23 Nov 2010 Extended Forecast

MAP PROVIDED BY ACCUWEATHER AND NOAA. PRECIP PROBABILITY/TYPE AND THANKSGIVING DAY OUTLOOK.....CUT AND PASTE TO SEE PRECIP TIME LOOP: http://www.hpc.ncep.noaa.gov/wwprobs/loop_files/zr_3hr_loop.html

THANKSGIVING TRAVEL PROBLEMS: Midwest and Northern Plains (WI, IL, MN, IA, NE, ND, SD)

Extremely cold weather will grip the Midwest and northern Plains through Thanksgiving. Snow and blowing snow will develop Wednesday across the Dakotas and Minnesota and continue into Thanksgiving. Due to the extremely cold weather and snow, travel along I-90, I-94, and I-35 will be extremely poor and in some cases, life-threatening. Road closures are also possible late Wednesday into Thursday.

The very cold weather will move across Nebraska and Iowa through Thanksgiving. There will be a little snow, but the extreme cold conditions will be the big problem along I-80.

Heavy thunderstorms will develop across Illinois Wednesday night and last into Thanksgiving morning. Expect slow-downs due to the storms along most Interstates.
There is the chance that the rain ends as snow across Wisconsin and northern Illinois on Thanksgiving Day. A few inches of snow may hit that area and cause icy travel due to flash freezes.



THE HIGH IN THE PLAINS WILL SLIDE EAST TODAY AND PASS THROUGH THE MISSISSIPPI RIVER VALLEY BY THIS EVENING. THE HIGH IS FORECAST TO PROVIDE MOSTLY SUNNY CONDITIONS FOR A LARGE PORTION OF IOWA TODAY AS THE COOL HIGH AIRMASS DOMINATES THE WEATHER. THE EXCEPTION WILL BE ACROSS THE HIGH PLAINS WHERE CLOUDINESS WILL BE ON THE INCREASE AHEAD OF A STRONG STORM SYSTEM PASSING THROUGH THE ROCKIES. THIS STORM IS FORECAST TO PUSH SLOWLY EASTWARD TONIGHT AS LOW PRESSURE DEVELOPS ALONG THE FRONT RANGE IN COLORADO. SOUTHERLY WINDS WILL INCREASE ACROSS MUCH OF THE REGION BY TONIGHT AS WARMER AIR HEADS NORTHWARD. SHOWERS ARE FORECAST TO SPREAD THROUGH EASTERN KANSAS AND MISSOURI LATE TONIGHT AS CLOUDS INCREASE ELSEWHERE. BY WEDNESDAY...THE LOW WILL TRACK QUICKLY EAST INTO IOWA AND MISSOURI BY EVENING. SCATTERED SHOWERS ARE FORECAST FROM CENTRAL IOWA SOUTH AND EAST INTO ILLINOIS AND MISSOURI. FARTHER NORTH (NORTH OF HWY 30)...A MIXTURE OF FREEZING RAIN/SLEET AND SNOW WILL OCCUR. AT THIS POINT...THE SYSTEM SHOULD BE MOVING FAST ENOUGH SO THAT SIGNIFICANT ACCUMULATIONS OF ICE AND SNOW WILL BE KEPT TO A MINIMUM. MUCH COOLER AIR WILL THEN SPREAD IN ON STRONG NORTHWEST WINDS WEDNESDAY NIGHT INTO THANKSGIVING DAY...A SLOW MODERATION IN TEMPERATURES IS EXPECTED INTO THE HOLIDAY WEEKEND WITH LITTLE CHANCE FOR PRECIPITATION AT THIS TIME.

THE NEXT STRONG SYSTEM WILL DEVELOP IN NRN TEXAS OVER THE WEEKEND AND TRACK NORTH INTO OKLAHOMA BY LASTER SUNDAY. STRONG WARM AIR WILL PUSH NORTHWARD AHEAD OF THE LOW - PUMPING MOISTURE INTO IOWA BY EARLY MONDAY. EXPECT PRECIP TO START OUT WITH RAIN LATE SUNDAY/EARLY MONDAY AND QUICKLY CHANGE OVER TO ALL SNOW DURING THE DAY MONDAY WITH VERY STRONG NORTH WINDS AS THE LOW TRACKS INTO WI/ILL.....


23 Nov 2010 Extended Forecast

Today 23rd - Dry - Temp 35.

Wed 24th - Windy - Morning Rain/Snow Changing to Rain with pockets of SLEET by afternoon - Lt Snow after sunset - Temps 40/25.

Thurs and Fri 25th/26th - Thurs morning Snowshowers and Windy - Then Dry - Temps Mid 20's to Low Teens.

Sat and Sun 27th/28th - Breezy - Dry - Temps Mid 30's to Low 20's.

Mon 29th - Snow and Windy - Temps Low 30's to Mid 20's.

Tues thru Thurs 30th-Dec 2nd - Clearing and Cold - High Temps Near 20.