Suppression Forecast
Issued by NWS Des Moines, IA

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FNUS73 KDMX 221256
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Spot Forecast for A4 2017...Iowa Army National Guard
National Weather Service Des Moines IA
656 AM CST Wed Feb 22 2017

Forecast is based on ignition time of 0800 CST on February 22.
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...

Warm and breezy conditions continue today. With minimum relative
humidity values lowering to under 30% over portions of southern
Iowa this afternoon...there will be an elevated fire threat for
fine fuels and grasses. Elsewhere increasing relative humidity
over the north today...where temperatures are cooler...will
lessen the threat for fires in that area. Colder with wetting
rainfall returns for Thursday with moderate to heavy snow possible
over portions of northern Iowa Friday followed by stronger
northwest winds.

.TODAY...

Sky/weather.........Sunny (5-15 percent).
Max temperature.....Around 74.
Min humidity........30 percent.
Eye level winds.....West winds 8 to 14 mph.
Wind (20 ft)........West winds 8 to 14 mph.
Mixing height.......300-2100 ft AGL increasing to 2600-3700 ft AGL
                    in the afternoon.
Transport winds.....West 9 to 17 mph.
Haines Index........4 to 5 or low potential for large plume
                    dominated fire growth to or moderate potential
                    for large plume dominated fire growth.

TIME (CST)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........14  10  7   5   3   2   4   4   4   4
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............50  54  59  64  68  73  74  73  71  68
RH..............58  54  45  40  36  31  30  31  34  39
20 FT WIND DIR..SW  SW  SW  SW  SW  SW  W   W   W   W
20 FT WIND SPD..9   10  13  14  14  14  14  13  12  9
20 FT WIND GUST.10  15  15  20  20  15  15  15      10
EYE LVL WND DIR.SW  SW  SW  SW  SW  SW  W   W   W   W
EYE LVL WND SPD.5   6   8   8   8   8   8   8   7   5
EYE LVL WND GST.10  15  15  20  20  15  15  15      10
MIX HGT (KFT)...0.3 0.3 0.9 1.5 2.1 2.6 3.2 3.7 3.4 3.2
MIXNG WIND DIR..S   S   S   S   S   SW  SW  W   W   W
MIXNG WIND SPD..9   9   10  12  13  15  17  17  15  10
HAINES INDEX....4   4   4   4   4   4   4   4   4   5

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent) then becoming
                    mostly cloudy (65-75 percent).
Min temperature.....Around 40.
Max humidity........85 percent.
Eye level winds.....North winds 5 to 8 mph.
Wind (20 ft)........North winds 5 to 8 mph.
Mixing height.......1100-2900 ft AGL decreasing to 300-800 ft AGL
                    in the late evening and overnight.
Transport winds.....North 6 to 10 mph.
Haines Index........3 to 5 or very low potential for large plume
                    dominated fire growth to or moderate potential
                    for large plume dominated fire growth.

TIME (CST)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........5      1      3      9      31     47
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TSTM COV........
TEMP............65     58     52     48     44     41
RH..............43     53     63     68     76     82
20 FT WIND......W 8    NW 8   NW 8   N 8    N 6    N 5
20 FT WIND GUST.10     10     10     10
EYE LEVEL WIND..W 5    NW 5   NW 5   N 5    N 4    N 3
EYE LVL WND GST.10     10     10     10
MIX HGT (FT)....2900   1100   400    800    400    500
MIXNG WIND......W 7    W 6    NW 8   N 9    N 7    N 8
HAINES INDEX....5      4      4      3      4      4

$$
Forecaster...Vachalek
Requested by...andy roby
Type of request...PRESCRIBED
.TAG 1702611.0/DMX
.EMAIL andy.roby@iowa.gov



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