Suppression Forecast
Issued by NWS Des Moines, IA

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FNUS73 KDMX 262323
FWSDMX

Spot Forecast for MCCB Night Burn...Mahaska County Conservation Board
National Weather Service Des Moines IA
623 PM CDT Thu Apr 26 2018

Forecast is based on ignition time of 1900 CDT on April 26.
If conditions become unrepresentative...contact the National Weather
Service.

An initial observation at ignition and a mid burn observation are required.

Please relay them to the National Weather Service for each prescribed burn.

.DISCUSSION...

A dry cold front will pass through the state this evening with a
brief period through mid evening of gusty northwest to north
winds. Winds will diminish overnight then increase again on Friday
as much drier air moves into the state. Dewpoints may fall into
the lower to mid 20s in the afternoon. An elevated fire threat is
already expected with burning discouraged but check later
forecasts for possible upgrades to the fire danger.


.REST OF TONIGHT...

Sky/weather.........Mostly cloudy (55-65 percent) then becoming
                    partly cloudy (25-35 percent) then becoming
                    clear (0-5 percent).
Min temperature.....Around 39.
Max humidity........73 percent.
Wind (20 ft)........Northwest winds 5 to 9 mph.
Mixing height.......7800 ft AGL decreasing to 300-1000 ft AGL.
Transport winds.....Northwest 8 to 15 mph.
Haines Index........3 to 4 or very low to low potential for large
plume dominated fire growth.

TIME (CDT)      7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........58  48  39  29  19  10  2   2   1   1   1
Weather cov.....
Weather type....
Tstm cov........
Temp............71  64  60  57  55  52  49  47  45  43  41
RH..............24  35  44  47  49  52  56  58  60  65  70
20 FT wind dir..W   NW  NW  NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..8   8   9   9   9   9   8   8   6   5   6
20 FT wind gust.        10  10  10  10
Mix hgt (kft)...7.8 5.5 3.2 1.0 0.7 0.5 0.3 0.3 0.3 0.4 0.3
Transp wind dir.W   NW  NW  NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.15  14  13  12  12  12  12  10  10  9   8
Haines index....4   4   3   3   3   3   3   3   4   4   4

$$
Forecaster...Ansorge
Requested by...Dave Sedivec
Type of request...PRESCRIBED
.TAG 1808043.0/DMX
.EMAIL sedivec@mahaskacounty.org



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