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The Iowa Department of Transportation and the forecast provider assume no responsibility for the use of this forecast, forecast errors, or omitted or misstated information. This forecast is strictly advisory in nature and all use, actions, and judgements taken on account of the forecast are solely the responsibility of the user.

Issue Time
02/03/2012 18:00CST

Complementary US Warnings and Watches
Polk County Forecast
Hour (CDT) Road Temp (F) Road Frost Prob (%) Road Evap Rate (gal/LM/hr) Bridge Temp (F) Bridge Frost Air Temp (F) Dew Point(F) Wind Wind Speed (mph) Wind Gust (mph) Precip Type Precip Prob (%) Precip Rate (in/hr) Sky

02/03/2012 18:00CST 35 5 150 40 NO 37 31 ENE 16 21 drizzle 30 trace overcast
02/03/2012 19:00CST 34 5 133 39 NO 36 31 ENE 15 21 rain 30 trace overcast
02/03/2012 20:00CST 33 5 193 38 NO 36 30 ENE 15 22 drizzle 30 trace overcast
02/03/2012 21:00CST 33 5 227 37 NO 36 29 ENE 16 23 drizzle 30 trace overcast
02/03/2012 22:00CST 32 10 198 37 NO 35 29 ENE 17 26 rain_snow 30 trace overcast
02/03/2012 23:00CST 32 15 156 37 NO 35 29 ENE 17 26 rain_snow 30 0.01 overcast
02/04/2012 00:00CST 33 5 276 36 NO 35 28 ENE 16 26 rain_snow 40 0.02 overcast
02/04/2012 01:00CST 32 15 188 34 NO 35 29 ENE 17 26 rain_snow 50 0.02 overcast
02/04/2012 02:00CST 32 15 190 34 NO 35 29 ENE 17 26 sleet 50 0.03 overcast
02/04/2012 03:00CST 31 20 141 33 NO 34 29 ENE 16 25 sleet 60 0.04 overcast
02/04/2012 04:00CST 31 25 95 32 NO 33 30 ENE 16 25 sleet 60 0.04 overcast
02/04/2012 05:00CST 31 25 86 31 NO 33 30 ENE 15 25 sleet 70 0.05 overcast
02/04/2012 06:00CST 32 20 114 31 NO 33 30 ENE 16 26 sleet 70 0.05 overcast
02/04/2012 07:00CST 32 15 110 31 NO 33 30 ENE 16 26 sleet 70 0.05 overcast
02/04/2012 08:00CST 32 15 114 31 NO 33 30 ENE 15 25 sleet 70 0.06 overcast
02/04/2012 09:00CST 32 15 111 31 NO 33 30 NE 15 24 sleet 70 0.06 overcast
02/04/2012 10:00CST 32 15 94 32 NO 33 31 NE 17 26 snow 70 0.06 overcast
02/04/2012 11:00CST 32 15 100 32 NO 34 31 NE 17 25 snow 70 0.06 overcast
02/04/2012 12:00CST 32 10 149 32 NO 34 31 NE 16 25 snow 70 0.05 overcast
02/04/2012 13:00CST 32 10 189 32 34 29 NE 17 25 snow 70 0.05 overcast
02/04/2012 14:00CST 32 10 191 32 35 29 NE 17 26 snow 70 0.05 overcast
02/04/2012 15:00CST 32 5 242 32 36 28 NNE 18 27 snow 70 0.04 overcast
02/04/2012 16:00CST 32 5 234 32 36 28 NE 17 27 snow 70 0.04 overcast
02/04/2012 17:00CST 32 5 219 32 36 27 NNE 14 25 snow 70 0.03 overcast
02/04/2012 18:00CST 32 5 227 32 35 27 NNE 14 25 snow 40 0.03 overcast
02/04/2012 19:00CST 35 NNE 14 snow 50 0.02 overcast
02/04/2012 20:00CST 35 NNE 13 snow 40 0.01 overcast
02/04/2012 21:00CST 35 NNE 13 snow 30 trace overcast
02/04/2012 22:00CST 36 NNE 14 snow 20 trace overcast
02/04/2012 23:00CST 35 NNE 13 none 0 0.00 mostly cloudy
02/05/2012 00:00CST 34 NNE 13 none 0 0.00 mostly cloudy
02/05/2012 01:00CST 33 NNE 12 none 0 0.00 mostly cloudy
02/05/2012 02:00CST 32 NNE 11 none 0 0.00 mostly cloudy
02/05/2012 03:00CST 32 N 9 none 0 0.00 mostly cloudy
02/05/2012 04:00CST 30 N 8 none 0 0.00 partly clear
02/05/2012 05:00CST 29 N 7 none 0 0.00 partly clear
02/05/2012 06:00CST 28 N 7 none 0 0.00 partly cloudy
02/05/2012 07:00CST 28 N 7 none 0 0.00 partly cloudy
02/05/2012 08:00CST 27 N 7 none 0 0.00 mostly clear
02/05/2012 09:00CST 30 N 7 none 0 0.00 mostly clear
02/05/2012 10:00CST 33 N 8 none 0 0.00 mostly clear
02/05/2012 11:00CST 36 N 7 none 0 0.00 mostly clear
02/05/2012 12:00CST 38 N 6 none 0 0.00 clear
02/05/2012 13:00CST 40 NNW 6 none 0 0.00 mostly clear
02/05/2012 14:00CST 41 NW 7 none 0 0.00 mostly clear
02/05/2012 15:00CST 41 NW 7 none 0 0.00 clear
02/05/2012 16:00CST 40 WNW 6 none 0 0.00 clear
02/05/2012 17:00CST 37 NW 4 none 0 0.00 clear
02/05/2012 18:00CST 33 WNW 4 none 0 0.00 clear

Hour (CDT) Road Temp (F) Road Frost Prob (%) Road Evap Rate (gal/LM/hr) Bridge Temp (F) Bridge Frost Air Temp (F) Dew Point(F) Wind Wind Speed (mph) Wind Gust (mph) Precip Type Precip Prob (%) Precip Rate (in/hr) Sky
Total Precipitation Accumulation
0.88
District Discussion
An area of low pressure will affect the district through Saturday night. Light rain from earlier this afternoon will taper off this evening. Later tonight, expect precipitation to redevelop as a rain/snow mix changing to all snow overnight. There is potential ice pellets could mix in Saturday morning. The snow will continue through the afternoon and diminish from north to south Saturday night. At this time, total accumulations district-wide will average between 2 and 4 inches, but could be a band in the southern or central part of the district were 4 to 7 inches will be possible. Gusty winds out of the north and northeast will produce areas of blowing and drifting Saturday into early Sunday. The remainder of Sunday will be dry and quiet.
State Discussion
Scattered areas of rainfall will gradually taper off tonight. Expect precipitation to ramp up later tonight as another surge of energy enters the large storm system over the Central Plains. This second period of precipitation will begin as rain or a rain/snow mix gradually changing to snow over the next 18 hours. The rain will mix with snow over the southwest and central areas tonight and will change over to all snow overnight. Southeastern Iowa will remain all rain overnight, but will slowly mix with and change over to snow during the day Saturday. There is potential of ice pellets mixing in with the rain/snow over central areas Saturday morning. The snow will slowly diminish from north to south Saturday night. Total accumulations will range from 5 to 10 inches over the southwest, 2 to 4 inches over central areas, and around an inch over the east central and southeast. Very little, if any, accumulation is expected across the north central and northeast, at this time. Gusty north and northeast winds will produce areas of blowing and drifting where the heavier snow falls Saturday into early Sunday. The remainder of Sunday will be dry and quiet.