The Nation's Weather 12.28.09

By WEATHER UNDERGROUND

The Associated Press
-- Wintry weather was forecast to persist over the Great Lakes and Northeast as a low pressure system hovered over the region.

The low pressure system that brought heavy snowfall and near blizzard conditions to the Northern Plains and Upper Midwest and periods of heavy rains over the Mid- and Upper Mississippi regions in the last few days was expected to move up the Ohio River Valley. While the storm had lost some energy, it was expected to gain moisture from the Great Lakes and the Atlantic Ocean and was forecast to bring light and scattered snowfall to the region.

Up to 4 inches of snow was forecast for New England, while the eastern shores of the Lower Great Lakes was expected to see up to 7 inches of heavier lake-effect snowfall. Parts of Maine were expected to only see a few scattered flurries with highs in the 30s, while the Ohio River Valley was to remain in the mid-20s.

Behind this system in the Central U.S., drier weather was expected as high pressure built over the region, bringing cool conditions and plenty of sunshine to the Plains. The Northern Plains were forecast to see highs in the lower 20s, while the Southern and Central Plains were to remain in the 40s and 50s.

In the West, a low pressure system spinning off the West Coast was expected to continue pushing slight moisture over the Pacific Northwest and northern California. Another cool day with scattered clouds and some snow was forecast over the higher elevations of the Cascades and the Sierra Nevadas.

Temperatures in the Lower 48 states Sunday ranged from a low of -20 degrees at Jordan, Mont. to a high of 79 degrees at Boca Raton, Fla.

The Nation's Weather 12.23.09

By WEATHER UNDERGROUND (AP)

The weather was forecast to become more wintry across the Central U.S. as a low pressure system continued to strengthen Wednesday. Flow around this large system was expected to pull abundant moisture into the Plains from the Gulf of Mexico. Forecasters expected the low pressure system, cool air from the north and moist air mass to trigger sloppy winter weather.

The Central and Northern Plains were to brace for 2 to 4 inches of snow during the day, with an additional 3 inches in the evening. The Upper Midwest was forecast to see increasingly snowy conditions by evening with snow totals near 3 inches.

A sloppy combination of freezing rain and snow was expected to make road conditions and any travel dangerous in southern Iowa, Nebraska, and Kansas, where temperatures were forecast just above freezing.

A winter weather storm watch was issued for most of the Central U.S.

Further south, the system was forecast to produce periods of heavy rain showers over Missouri, while a flash flood watch was issued over most of the state.

A low pressure system was expected to push eastward from the Great Basin and over the Central Rockies, strengthening as it traversed the mountains and dropping another 3 to 7 inches of snow.

Otherwise the West Coast was forecast to remain cool and dry as high pressure hovered over the region.

Meanwhile, the Northeast and New England was to see a few light and scattered snow showers with snowfall totals less than a half of an inch and highs in the 20s. Partly cloudy skies were forecast in the Southeast, with highs near 60.

The Nation's Weather 12.22.09

By WEATHER UNDERGROUND (AP)

Messy winter weather was forecast to continue Tuesday over the Northern U.S. as a low pressure system tracked over the Pacific Northwest and into the Northern Plains. This system was expected to obtain ample moisture from the Pacific Ocean and continue spreading scattered rain showers with periods of heavy snow at higher elevations.

Authorities issued a winter weather advisory over the region because up to 6 inches of snowfall was expected to fall over the Cascades and 1 to 3 inches on the Northern Rockies. Less than a half of an inch of rain was forecast at lower levels.

As this system strengthened in the West, the Northern and Central Plains was forecast to see increasingly cloudy skies. This system was expected to trigger a weak trough of low pressure, leading the system eastward across the Central U.S. While the trough was weak, it was forecast to possibly kick up scattered flurries over the Northern Plains and Upper Midwest.

A sloppy combination of snow and freezing rain was forecast for the Central Plains on Tuesday. The region was on the brink of a blizzard warning as strong winds were expected to move in from the West. Strong winds with gusts up to 29 mph were anticipated over much of the Plains, making travel and road conditions dangerous.

High pressure was expected to continue dominate the East Coast, bringing plenty of sunshine with highs in the South near 60, while the Northeast and New England were forecast in the 30s.

Temperatures in the Lower 48 states Monday ranged from a low of -9 degrees at Gunnison, Colo. to a high of 76 degrees at Harlingen, Texas.

The Nation's Weather 12.21.09

By WEATHER UNDERGROUND (AP)

The Pacific Northwest was forecast to experience another messy day on Monday as a strong low pressure system moved through the region. The system was expected to obtain ample moisture from the Pacific Ocean and pull cold air in from British Colombia, ensuring persistent cool weather with highs in the 20s and 30s and light rain over the region.

From 2 to 4 inches of new snow was anticipated over the Cascades and Northern Rockies, with less than a half of an inch of rain at lower elevations. Cool conditions with light and scattered showers were also forecast to extend into northern California.

Moving east, a low pressure system that dipped into the Upper Midwest from central Canada was forecast to bring another wintry day to the Great Lakes. This system was expected to slowly track eastward over the Great Lakes and kick up 1 to 2 inches of snowfall on Monday.

Elsewhere in the Central and Eastern U.S., high pressure was expected to continue building over the Mississippi and Ohio River Valleys, bringing a few patchy clouds with cool conditions. The North was forecast to remain in the 20s, while the Southeast was to see another sunny day with highs in the 50s. Relatively inactive weather was expected in the Plains on Monday.

Temperatures in the Lower 48 states Sunday ranged from a low of -13 degrees at Gunnison, Colo. to a high of 73 degrees at San Fernando, Calif.

The Nation's Weather 12.20.09

By WEATHER UNDERGROUND (AP)

The winter storm was expected to linger over the East Coast and bring another messy day to New England and the Northeast. A low pressure system was forecast to keep pushing northward up the East Coast and pulling cool and moist conditions into the region.

A winter weather advisory was issued over the region, with 3 inches to 5 inches of new snowfall expected over much of New England. Further north, a blizzard warning was in effect for Massachusetts as 6 inches to 10 inches of snow was anticipated with winds gusting up to 30 mph.

The conditions could mean dangerous road and travel conditions over most of the eastern U.S.

To the west and south of the storm system, dry and cool conditions were expected as high pressure started to build in from the Plains. A few scattered clouds were forecast over the Central and Southern U.S., with temperatures in the South expected to remain in the 50s, while the Midwest was forecast to see highs near 30.

A weak low pressure system tracking through the Northern Plains and Upper Midwest could allow for a few scattered flurries on Sunday.

More active weather was anticipated in the West, as a low pressure system moved onshore from the Pacific Ocean. This system could mean widespread scattered precipitation over most of the Pacific Northwest. Less than a quarter of an inch of rain was expected over most areas, while light snow with accumulation of up to 3 inches was expected over the higher elevations. The rest of the West was forecast to see cool conditions with overnight lows dropping below freezing in some areas.

Temperatures in the Lower 48 states on Saturday ranged from a low of -20 degrees at Berlin, N.H., to a high of 82 degrees at San Diego.

The Nation's Weather 12.19.09

By WEATHER UNDERGROUND (AP)

A major winter storm was forecast to keep moving up the Eastern Seaboard on Saturday.

The storm was expected to take a dangerous trajectory as it dropped widespread snow first in the Mid-Atlantic and northern Appalachians and then through the southern and coastal New England states.

Many winter storm warnings were posted from eastern Kentucky through eastern New England. The storm was also expected to bring strong winds that would blow the falling snow into blizzard conditions for many areas.

Frigid air was forecast to fill into the Upper Midwest and Mississippi Valley behind the storm. That cold air was expected to plunge toward the Gulf Coast and would greatly dampen daytime high temperatures throughout the East.

In the West, a warm front was forecast to stretch into the Northwest from the Pacific, providing rain and high-elevation snow in the Northwest and into the Intermountain West.

Temperatures in the Northeast were expected to rise into the 20s and 30s, while the Southeast was forecast to see temperatures in the 40s, 50s and 60s. In the Upper Midwest, temperatures were set to rise into the 10s, 20s and 30s, while the Rockies were expected to see temperatures in the 20s and 30s. The Southwest was forecast to see temperatures rise into the 60s and 70s.

In the Lower 48 states, temperatures on Friday ranged from a low of -25 degrees at Saranac Lake, N.Y., to a high of 83 degrees at Santee, Calif.

The Nation's Weather 12.18.09

By WEATHER UNDERGROUND (AP)

A potent storm system was forecast to deepen throughout Friday as it moved from the Gulf of Mexico across the Florida Peninsula and began its trek up the East Coast.

The storm was expected to drop heavy rain along the Gulf Coast at the start of the day, but by noon Eastern time, it would begin to track northeastward, heading for the Carolinas. Once in the Atlantic, the storm was expected to feed off the abundant warm water of the Gulf Stream current and begin a process of rapid intensification. By nightfall snow was forecast in the southern Appalachian Mountains, moving north to around the Pennsylvania border.

At the coast, rain was expected to make its way north to the Mid-Atlantic. Overnight the storm was expected to drop significant snow throughout the Mid-Atlantic — lasting through the weekend — and some locations were forecast to see very heavy snowfall totals by the time the weather cleared on Sunday.

Generally calm weather was forecast for the Plains Friday, with light overcast throughout the Northern Tier states, and a few showers and snow showers throughout the Dakotas.

Along the Pacific Coast, a Pacific storm was to push into the Northwest, bringing rain to the coast and snow to the higher elevations.

Temperatures in the Lower 48 states Thursday ranged from a low of -23 degrees at Mt. Washington, N.H. to a high of 84 degrees at Marathon, Fla.

The Nation's Weather 12.16.09

By WEATHER UNDERGROUND (AP)

The storm system that pounded through the Great Lakes and Northeast was forecast to depart the region Wednesday, bringing a drying trend. Nevertheless, localized lake effect snow was expected to continue over southern and eastern shores of the Lakes but it should remain mostly on the light side. New snow accumulation was to remain under 3 or 4 inches.

Much colder air was expected to filter in after the system. Thus, temperatures were expected to drop at least 5 to 7 degrees below normal Wednesday and Thursday, in northern New England in particular.

High pressure was forecast to build into the South on Wednesday, leading to a drying trend across the Gulf States and Southeast. The only exception was likely to be the extreme southern states where an old front stalls. This old front combined with energy from the Intermountain West was expected to help produce potentially heavy rain and moderate to strong thunderstorms in southern Texas and Louisiana. Moreover, scattered showers and thunderstorms were also likely in southern Florida.

Out West, more rain and mountain snow was forecast across the Northwest, Northern Rockies and Northern California as a Pacific system gradually moved through. Then, a warming and drying trend was to take place Thursday as high pressure began building in the region.

Temperatures in the Lower 48 states Tuesday ranged from a low of -40 degrees at Jordan, Montana to a high of 86 degrees at Lakeland, Florida.

The Nation's Weather 12.15.09

By WEATHER UNDERGROUND (AP)

Two weather systems were forecast to produce unsettling weather activity in the West and East on Tuesday.

A strong Pacific front was set to hit the Pacific Northwest and northern California with significant onshore flow and moisture. Energy along the front was expected to combine with rich Pacific moisture to produce swaths of lower elevation rainfall and high elevation snowfall throughout the regions. Gusty winds were forecast to accompany precipitation throughout the day. Precipitation in northern California was expected to spread southward into Monterrey Bay.

A weak ridge of high pressure was also expected to keep showers from spreading into southern California, while ridging was forecast to translate into warmer and drier weather conditions in the south.

In the East, low pressure over the Great Lakes was expected to continue to produce a mix of lake effect rain and snow showers as it shifted into the Lower Great Lakes and the Northeast. The heaviest snow totals are expected to develop to the east of the Great Lakes.

Meanwhile, an associated cold front was forecast to stretch across the Mid-Atlantic and the Southeast, mingling with moisture from the Gulf of Mexico to produce another round of light showers and thunderstorms.

Elsewhere, high pressure in the Central U.S. was forecast to keep a frigid air mass locked over the Plains and the Midwest.

Temperatures in the Lower 48 states Monday ranged from a low of -32 degrees at Jordan, Montana to a high of 87 degrees at Naples, Florida.

The Nation's Weather 12.14.09

By WEATHER UNDERGROUND (AP)

A mass of cold air moving south from Canada was forecast to push down temperatures in the central U.S. on Monday, with snow falling across the Great Lakes region and a mix of precipitation predicted to cover the Pacific Northwest.

High pressure was predicted to fill in behind the frigid Canadian air, holding daytime temperatures in the central part of the country below seasonal averages. In the Northern Plains states, temperatures weren't expected to rise above zero, while highs in the Central Plains states were forecast to reach into the 10s and 20s.

Bitter cold wind chills were predicted for the early morning and evening hours.

Meanwhile, a wave of low pressure was forecast to drop light to moderate snow showers as it heads across the Great Lakes. The heaviest snowfall was expected to blanket areas from eastern Iowa through Michigan's upper peninsula.

Showers and thunderstorms were forecast for areas of the Southeast, while high pressure was expected to return drier weather to the Mid-Atlantic and much of the Northeast. Most of California was expected to experience drier weather through the afternoon, with showers forecast in the northern part of the state Monday evening.

Temperatures in the Northeast were forecast to rise into the 30s and 40s, while the Southeast was to see temperatures mostly in the 40s and 50s, with highs reaching the 80s in parts of Florida. The Northwest was expected to see highs in the 40s.

Temperatures in the Lower 48 states on Sunday ranged from a low of minus 21 degrees at Westby, Mont., to a high of 87 degrees at Fort Pierce, Fla

The Nation's Weather 12.12.09

By WEATHER UNDERGROUND (AP)

More active weather was forecast across the country on Saturday, with widespread rain and high elevation snow expected in the West and significant rain predicted in the Southeast and the Mississippi Valley.

The last of a storm that swept through the West Coast on Friday was forecast to produce morning rain and high elevation snow from California through the Great Basin. That storm was to give way to a more intense Pacific storm likely to renew heavy rain.

The new storm was predicted to slam the West Coast late in the morning and last throughout the day. Significant heavy rain and high elevation snow were forecast in California before moving into the Great Basin and Intermountain West by the end of the day.

Winter storm warnings were in effect for much of the West through Saturday and into Sunday. Strong winds also were expected to be an issue in the higher elevations and along mountain ridges. Drivers were advised to monitor local weather.

A storm also was forecast to spread through the Southeast from the Gulf Coast, bring widespread rain to the Southeast and lower Mississippi Valley. Freezing rain was expected to develop late in the day near the Appalachian Mountains.

The nation's midsection was predicted to stay dry.

The Northeast was forecast to rise into the 20s and 30s, while the Southeast was to see temperatures in the 30s, 40s and 50s. The Northern Plains were expected to rise into the 10s, 20s and 30s, while the Northwest was see temperatures in the 30s and 40s.

Temperatures in the Lower 48 states on Friday ranged from a low of minus 29 degrees at Farson, Wyo., to a high of 84 degrees at Key West, Fla.

The Nation's Weather 12.11.09

By WEATHER UNDERGROUND (AP)

Wintry weather was expected to persist over the Northeast and New England on Friday, while the Central U.S. could start to warm.

The low pressure system that brought heavy snowfall to the Central and Eastern U.S. was expected to push northeastward into eastern Canada and off the East Coast.

But due to the large size of the storm, it could continue pulling a strong eastward flow over the Great Lakes and into the Northeast. That could cause heavy lake-effect snow to dumping over the eastern shores of the eastern Great Lakes.

Another 5 to 9 inches of heavy and damp snow was expected over northern New York, though western Michigan was expected to see an inch or two on Friday.

Behind this system, high pressure was expected to dominate the Central U.S. and bring cool and sunny skies to the Plains and Mississippi River Valley. Slightly warmer temperatures were expected as clockwise flow around the ridge pulled warmer air into the Northern and Central Plains.

New England was expected to remain in the 20s and 30s, while temperatures in the teens were forecast in the Northern Plains and Upper Midwest.

South of this system, a low pressure system was expected to develop over the Gulf of Mexico, which could pick up moisture and kick up scattered showers and thunderstorms. Wet weather from the event was expected to extend over the Southeastern states and into Mid-Atlantic states with rainfall amounts of less than a half inch in most places.

In the West, a strong low pressure system spinning off the coast of California was forecast to push onshore on Friday and spread light rain over most of California. Rainfall totals of less than a quarter of an inch were expected. High temperatures were expected to remain in the 50s and 60s, while the Pacific Northwest was expected to be cloudy with highs in the 30s and 40s.

On Thursday, temperatures in the Lower 48 states ranged from a low of -27 degrees at Big Piney, Wyo. to a high of 102 degrees at Newnan, Ga.

The Nation's Weather 12.10.09

By WEATHER UNDERGROUND (AP)

A strong winter storm was forecast to continue to bring snow and cold air to the Central U.S. on Thursday.

An intense low pressure system was expected to move from the Great Lakes into the Northeast, allowing it to obtain additional moisture and bring another snowy day to the region.

Snowfall was expected to diminish over the Upper Great Lakes, but 3 to 5 inches were expected over the Northeast and New England. Strong flow from the west could allow for snow to develop along the eastern shores of the Great Lakes and create periods of heavy snowfall.

Behind this system, cold air was expected to pour in from Canada as a high pressure built over the Plains. Highs of 20 degrees below normal were expected in the Plains, while the Appalachians could see highs of 10 degrees below normal. The Upper Midwest could see wind chills between negative 10 and negative 20.

Blizzard conditions were no longer anticipated over the Upper and Mid-Mississippi River Valley, but the region was expected to continue seeing strong winds cause blowing snow and dangerous traveling conditions.

To the South, high pressure was expected to build and bring a cold and sunny day to the region. Highs temperatures were expected to remain in the 40s and 50s.

Out West, a low pressure system spinning off the coast of California was forecast to push closer to land and bring another cloudy day with cool temperatures. Highs were expected to remain in the 40s and 50s, but precipitation could off until Friday.

On Wednesday, temperatures in the Lower 48 states ranged from a low of -37 degrees at Sixth Crossing, Wyo. to a high of 87 degrees at Pampano Beach, Fla.

The Nation's Weather 12.09.09

By WEATHER UNDERGROUND (AP)

The winter storm over the Central and Eastern U.S. was expected to amplify on Wednesday.

As the system pushed eastward into the Mississippi River Valley, it was forecast to scoop up a minor trough lingering over the Gulf states and strengthen as it obtained additional moisture. The system was expected to create a double frontal boundary, with one strong cold front followed closely by a second, that could sweep from the Central Plains, over the Mississippi Valley and approach the East Coast.

The system was expected to extend well northward into the Great Lakes, where it could continue bringing periods of heavy snowfall. Winter weather and blizzard advisories were to remain in effect over the Midwest as snowfall were expected to vary between 1 and 2 inches per hour. Wind gusts of up to 29 mph were expected over the Upper and Mid-Mississippi Valley.

The Upper Midwest and Great Lakes region could see up to 3 inches of new snow, while New England and the Northeast were expected to see increasing snowfall with totals less than a half of an inch.

To the South, above-freezing temperatures could allow for periods of heavy rain associated with late season thunderstorm development. A messy combination of sleet and frozen rain was expected between the Tennessee and Ohio valleys. Dangerous roadways were expected.

Behind the storm system, cold air was forecast to continue pouring in from Canada. It could allow for extremely cold temperatures over the Northern and Central Plains with wind chills that allow for below-zero temperatures.

Breezy conditions were anticipated over most of the Rockies and Central U.S. Further West, a trough of low pressure off the West Cost was expected to push moisture over California and allow for another rainy and cool day. Highs were expected to remain in the 40s and 50s across the West Coast.

On Tuesday, temperatures in the Lower 48 states ranged from a low of -34 degrees at Havre, Mont. to a high of 89 degrees at Punta Gorda, Fla.

The Nation's Weather 12.07.09

By WEATHER UNDERGROUND (AP)

Active weather was expected to develop nationwide on Monday.

A strong winter weather disturbance from the Pacific was forecast to interact with a trough of low pressure in the jet stream and produce a swath of precipitation and cold temperatures in California.

Lowered temperatures throughout the state were expected to aid in creating areas of heavy snowfall across the mountains. Lower elevations may also see snow flurries during the morning hours with no snow accumulation, while light snow accumulations are expected in the Central Valley.

Wet weather was expected to taper off during the afternoon hours in northern California and by the evening hours in southern California.

Meanwhile, the Pacific Northwest could see a brief period of dry weather on Monday due to strong high pressure situated over western Canada. The system was expected to continue pumping cold Arctic air into the Pacific Northwest during the next few days, keeping the region under cold and dry conditions through much of the week.

In the Central Great Basin, a major winter storm was forecast to hit the Four Corners with strong wintry weather. Blizzard like conditions with heavy snowfall, blustery winds and strong wind gusts were expected throughout western Colorado, southeastern Utah and central Arizona. Significant snowfall and blowing snow could create limited visibility and dangerous traveling conditions.

Out East, low pressure and scattered snow showers were expected to reach the Great Lakes region on Monday.

To the south, moisture from the Gulf of Mexico was forecast to spark rain showers and thunderstorms near the central and western regions of the Gulf Coast.

Fairly dry weather was expected to develop throughout the eastern seaboard due to high pressure.

On Sunday, temperatures in the Lower 48 states ranged from a low of -20 degrees at Stanley, Idaho, to a high of 80 degrees at Fort Lauderdale, Fla.

The Nation's Weather 12.06.09

By WEATHER UNDERGROUND (AP)

High pressure was forecast to build over the East Coast on Sunday as the strong storm that brought rain and snow to the region on Saturday moved into the northern Atlantic.

Temperatures were expected to start out chilly in most locations, but were to warm up slightly throughout the day. Temperatures east of the Appalachians were forecast to reach into the 40s while the eastern interior could expect temperatures to hover right around the freezing mark for much of the day. The high was also to bring clear skies to much of the region, which could help melt any snow that accumulated Saturday.

Chilly temperatures were to spread south along the Eastern seaboard with below freezing temperatures expected as far south as northern Florida.

High pressure also was to remain in place across the Plains, where despite sunny clear skies, temperatures were expected to cool off a bit, with temperatures forecast to fall far below normal.

West of the Rockies, high pressure was to keep the skies clear. Temperatures were expected to remain chilly along the West Coast, with the Northwest seeing highs well below normal, and more southern locations only moderately cooler than normal.

Temperatures in the lower 48 states Saturday ranged from a low of -9 degrees at Crane Lake, Minn. to a high of 83 degrees at Fort Lauderdale, Fla.

The Nation's Weather 12.05.09

By WEATHER UNDERGROUND (AP)

Early season snow was expected across the Appalachians on Saturday as an intense, low-pressure system developed off the Eastern Seaboard.

Fueled by warm Gulf Stream waters, the storm was forecast to rapidly intensify throughout the day helping to enhance snow amounts in the region. In addition to snow in the higher elevations, heavy rain and strong winds were anticipated at the coast. Exceptionally cold air was expected to fill in behind the storm as it moved toward the northeast throughout the day, and some of the rain in the coastal plain was to switch over to snow as it tapered off.

Overnight the cold air was forecast to deepen and low temperatures to drop to their lowest readings of the winter so far.

Temperatures in the Plains were to also be on the cool side Saturday, but clear skies were expected to bring a sunny and crisp day to the region with no precipitation anticipated until the late evening when some snow showers were to slide out of the Northern Rockies.

The snow showers in the Rockies were forecast to be triggered by a weak, low-pressure system sliding through southern Canada. Precipitation was to be most intense in the morning hours, tapering off as the system slid eastward.

The West Coast was expected to see another clear cool day Saturday, a high pressure remains in control of the weather pattern. In the northwest, temperatures were to be cold while the rest of the region was to see chilly temperatures. Highs along the California coast were forecast to be in the 60s south of Point Conception, and in the 50s farther north. In Washington and Oregon, many locations were to see temperatures flirting with the freezing mark for much of the day.

Temperatures in the Lower 48 states Friday ranged from a low of -21 degrees at Island Park, Idaho to a high of 84 degrees at Kendall, Fla.

The Nation's Weather 12.03.09

By WEATHER UNDERGROUND (AP)

A strong storm in the Southeast was forecast to produce more active weather as it moved northeast on Thursday.

Healthy moist flow from the Gulf of Mexico and Atlantic Ocean was expected to wrap around the system and fuel another round of light to moderate precipitation in the Mid-Atlantic, the Ohio Valley and the Northeast.

As the system moved toward southeastern Canada, energy from the storm was expected to spread across the Upper Midwest and leave snow in some areas.

The tail of a cold front associated with this system was forecast to spark rain and thunderstorms in southern Florida as the front exited into the Atlantic Ocean.

Chilly and less active weather was expected to persist behind this system in the Central U.S. as a frigid ridge of high pressure dropped into the region.

Cold air flow associated with the system was expected to push temperatures below seasonal averages from the Rockies through the Plains.

High pressure could keep dry and quiet weather in place throughout the West.

On Wednesday, temperatures in the Lower 48 states ranged from a low of -16 degrees at Yellowstone, Wyo. to a high of 90 degrees at Boca Raton, Fla.

The Nation's Weather 12.02.09

By WEATHER UNDERGROUND (AP)

Two weather features were expected to continue bringing wet weather to the U.S. on Wednesday.

One strong low pressure system was forecast to persistently advect northeast over the Southeastern states and into the Tennessee Valley and Mid-Atlantic states. This could continue to pull abundant moisture off the Gulf of Mexico and spread scattered showers well into Kentucky and the Virginias.

Periods of heavy downpours were expected to track through Florida, Georgia, and the Carolinas. Strong winds were forecast to accompany this system with gusts of up to 60 mph in some areas. The South was expected to see cool conditions with highs in the 50s.

The system also could advect minor moisture into New England and Northeastern states. Overcast skies with a few sprinkles were expected with highs remaining in the 40s.

In the North, a strong low pressure system was expected to dip into the Upper Midwest from central Canada and pull a cold front over the region. The system, associated with bitterly cold temperatures, could keep high temperatures in the single digits in the Northern Plains and western Great Lakes.

The system also was expected to continue to bring light and scattered flurries to Minnesota that could move into northern Wisconsin by evening.

Out West, high pressure was forecast to hover over the West Coast and bring another warm, dry day. Temperatures in California were expected to remain in the 60s and 70s, while the Pacific Northwest could see highs near 50.

On Tuesday, temperatures in the Lower 48 states ranged from a low of 1 degrees at Alamosa, Colo. to a high of 87 degrees at Boca Raton, Fla.

The Nation's Weather 12.01.09

By WEATHER UNDERGROUND (AP)

Wet weather in the East was expected to diminish Tuesday as a cold front pushed off shore, while a strong low pressure system could bring snow to the Southern Rockies.

A low pressure system and associated cold front was forecast to push eastward and into the Atlantic Ocean as high pressure builds in from the Central U.S. The front could bring some residual morning showers to the coastal regions of the Mid-Atlantic and New England states.

But the front was expected to wrap back around to the west and linger over Florida, where it could trigger light rains with rainfall totals of less than a half of an inch. Afternoon thunderstorms may develop and produce up to an inch of rain in these areas. Breezy conditions were expected to persist over the region with wind gusts of up to 25 mph.

Highs in the upper 60s were forecast for the Southeast, while the North was expected to see highs in the 40s.

In the West, a small yet intense low pressure system was expected to move northeast from northern Mexico and into the Southern Rockies and Southern Plains. Flow around the system could pull moisture in from the Gulf of Mexico and allow for up to 2 inches of snowfall and as much as 5 inches at higher elevations.

The eastern edge of the system was expected to move over Texas and bring abundant moisture to the Texas coast. Periods of heavy rain and coastal flooding were expected in the region.

The system also was forecast to push cloudy skies that may trigger a few sprinkles over Alabama and Georgia by Tuesday afternoon.

To the North, a low pressure system was expected to dip into the U.S. from Canada. The system could pull warmer air in from the south and allow for another unseasonably warm day for the Upper Midwest and Northern Plains. Sunny skies with highs near 50 were expected over most of the Midwest, while areas along the border could see scattered precipitation.

On Monday, temperatures in the Lower 48 states ranged from a low of -7 degrees at West Yellowstone, Mont. to a high of 82 degrees at Boca Raton, Fla.