Winter conditions to return with a vengeance this weekend

Kansas City, Mo. – Friday, Dec. 7, 2012 – NOAA forecasters said the record warm temperatures enjoyed by most of the country in recent weeks will be a thing of the past at the conclusion of the coming weekend. High temperatures will once again start out 10-15 degrees above average, but will plummet as new winter storm systems move across the country.

 
Forecasters at NOAA’s Hydrometeorological Prediction Center said a front extending from the Great Lakes to the southern High Plains will move across the Tennessee Valley and into the southern Plains by Saturday evening. Rain will develop over portions of the northern Mid-Atlantic to the Ohio Valley/Great Lakes and into the Northeast. A second round of precipitation will develop over the Central Gulf Coast to parts of the Ohio Valley and Central Appalachians generating showers and thunderstorms by Saturday evening.
 
Upper level energy over the Northern High Plains and Central Rockies will move to the Lower Great Lakes by Saturday, producing light snow from the northern Rockies to the northern Plains, moving to the Upper Midwest by Friday night and to the Great Lakes by Saturday morning.
 
A front moving onshore over the Pacific Northwest on Friday will move to the Central Plains/Central Rockies by Saturday night, producing coastal rain and higher elevation snow over parts of the Northwest through Friday evening. The system will develop snow over the northern Rockies that will that will expand to the Northern Plains and Upper Mississippi Valley into the Central Rockies Friday night and Saturday evening.
 
See today’s Hazards Map at http://www.weather.gov/largemap.php and the Hydrometeorological Prediction Center threats map at http://origin.hpc.ncep.noaa.gov/noaa/noaad1.gif.
 
With some slight variation, the country’s weather pattern through the weekend will entail snow and some heavy snow to the North and the West, rain and thunderstorms to the East and Southeast and mostly dry conditions in the Central and Southern Plains. Forecast graphics through the weekend may be seen at:
 
Friday: http://origin.hpc.ncep.noaa.gov/noaa/noaad1.gif
 
Saturday: http://origin.hpc.ncep.noaa.gov/noaa/noaad2.gif
 
Sunday: http://origin.hpc.ncep.noaa.gov/noaa/noaad3.gif
 
Winter weather conditions ranging from freezing rain to heavy snow will cause problems for at least 15 states from Washington and Oregon to Lower and Upper Michigan, including parts of:
  • Washington, Oregon, Idaho, Montana, Wyoming, Colorado, New Mexico, North Dakota, South Dakota, Minnesota, Iowa, Wisconsin and Michigan.
Several Winter Storm Watches and Winter Storm Warnings are in effect for those areas through Sunday afternoon and evening. Forecast conditions include:
  • 2-5 inches of snow in the valleys and 7-12 inches in the mountains of eastern Washington and western Idaho
  • 2-4 inches of snow with 15-25 mph winds over northern Idaho and western Wyoming
  • 6-12 inches of snow with 15 inches and more on northwest facing slopes in west-central Wyoming
  • 2-4 inches of snow and 15-25 mph winds gusting to 30 mph in northwest Wyoming
  • 4-6 inches of snow in northern South Dakota
  • 2-4 inches of snow today in central South Dakota with 4-6 inches new snow Saturday
  • 6 inches and more of new snow through Sunday in northern Minnesota
  • 6 inches of snow in northwest Wisconsin
NOAA precipitation forecasts for the coming five days may be found on the web site at http://www.hpc.ncep.noaa.gov/qpf/qpf2.shtml.
 
Local National Weather Service office web pages are available at http://weather.gov; select the desired location. All segments of the U.S. weather and flood forecasts and outlooks are available through the NOAAWatch briefing page at http://www.noaawatch.gov/briefing.php.
 
Contact: Public Affairs Specialist Patrick Slattery (816) 268-3135


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