SAC-CALHOUN-WEBSTER-CRAWFORD-CARROLL-GREENE-BOONE-AUDUBON-GUTHRIE- DALLAS-CASS-ADAIR-MADISON–ADAMS-UNION-TAYLOR-RINGGOLD–

324 PM CST TUE DEC 18 2012 .

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW…WHICH IS IN EFFECT FROM 4 PM WEDNESDAY TO NOON CST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT FOR THE COUNTIES MENTIONED ABOVE. A WINTER STORM WATCH REMAINS IN EFFECT FOR COUNTIES IN FAR WEST AND SOUTHWEST IOWA FROM WEDNESDAY AFTERNOON THROUGH LATE WED. NIGHT.

TIMING…PRECIPITATION WILL OVERSPREAD CENTRAL IOWA LATE WEDNESDAY AFTERNOON. SNOW IS EXPECTED ALONG AND NORTH OF AN ATLANTIC THROUGH JEFFERSON LINE. RAIN IS EXPECTED IN SOUTHERN IOWA SOUTH OF A BEDFORD TO OSCEOLA LINE. IN BETWEEN…A RAIN AND SNOW MIX IS EXPECTED. THIS PRECIPITATION WILL CHANGE TO ALL SNOW LATE WEDNESDAY EVENING BEFORE ENDING ON THURSDAY MORNING.

STORM TOTAL SNOW ACCUMULATION…6 TO 10 INCHES OF SNOW IS EXPECTED BY THURSDAY MORNING. THE HEAVIEST SNOW AXIS WILL BE ALONG A LINE FROM ATLANTIC TO ADEL. THE LOWEST AMOUNTS ARE EXPECTED NEAR THE MISSOURI BORDER. SNOW DRIFTS SEVERAL FEET DEEP WILL BE POSSIBLE GIVEN THE STRONG WINDS.

WINDS/VISIBILITY…WINDS WILL BECOME VERY STRONG WEDNESDAY NIGHT FROM THE NORTH NORTHWEST. SUSTAINED WINDS OF 25 TO 35 MPH ARE EXPECTED WITH GUSTS OVER 45 MPH POSSIBLE. THE STRONGEST WINDS ARE EXPECTED A FEW HOURS PRIOR TO DAYBREAK THROUGH NOON THURSDAY. NEAR BLIZZARD CONDITIONS MAY OCCUR WITH VISIBILITIES REDUCED BELOW ONE QUARTER OF A MILE FROM TIME TO TIME.

IMPACTS...VERY DANGEROUS CONDITIONS ARE EXPECTED TO DEVELOP ON WEDNESDAY NIGHT INTO THURSDAY MORNING. BE PREPARED FOR VERY DIFFICULT TRAVEL AND NEAR BLIZZARD CONDITIONS. THIS WARNING MAY NEED TO BE UPGRADED TO A BLIZZARD WARNING SHOULD FORECAST CONDITIONS WARRANT.

PRECAUTIONARY/PREPAREDNESS ACTIONS… A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL…KEEP AN EXTRA FLASHLIGHT… FOOD…AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.