Suppression Forecast
Issued by NWS Des Moines, IA

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000
FNUS73 KDMX 230848
FWSDMX

Spot Forecast for Prairie Point Crossing...City of Johnston
National Weather Service Des Moines IA
348 AM CDT Thu Mar 23 2017

Forecast is based on ignition time of 0800 CDT on March 23.
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 warm front will lift into Iowa today and will bring light
showers to the area today and possibly a thunderstorm. By this
afternoon, any precipitation is expected to be focused north of
Highway 30. The wind will be breezy from the southeast.

.TODAY...

Sky/weather.........Cloudy (85-95 percent). Isolated rain showers
                    late in the morning. Scattered rain showers
                    early in the afternoon, then isolated rain
                    showers late in the afternoon.
Max temperature.....Around 59.
Min humidity........39 percent.
Eye level winds.....Southeast winds 10 to 13 mph.
Wind (20 ft)........Southeast winds 10 to 13 mph.
Mixing height.......1700-2500 ft AGL.
Transport winds.....Southeast 17 to 24 mph.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........97  96  94  94  95  95  89  84  79  76
WEATHER COV.....    ISO ISO ISO SCT SCT SCT ISO
WEATHER TYPE....    RW  RW  RW  RW  RW  RW  RW
TSTM COV........
TEMP............41  42  43  45  46  48  50  52  55  56
RH..............57  60  62  62  65  65  63  63  59  62
20 FT WIND DIR..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT WIND SPD..12  12  13  13  13  13  13  13  13  13
20 FT WIND GUST.15  15  15  15  15  15  15  15  15  15
EYE LVL WND DIR.SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
EYE LVL WND SPD.7   7   8   8   8   8   8   8   8   8
EYE LVL WND GST.15  15  15  15  15  15  15  15  15  15
MIX HGT (KFT)...2.0 2.1 2.2 2.3 2.4 2.5 2.4 2.4 2.4 2.5
MIXNG WIND DIR..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
MIXNG WIND SPD..20  22  23  24  24  24  23  22  20  17
HAINES INDEX....2   2   2   2   2   2   2   2   2   2

.TONIGHT...

Sky/weather.........Mostly cloudy (65-75 percent).
Min temperature.....Around 53.
Max humidity........80 percent.
Eye level winds.....South winds 9 to 13 mph.
Wind (20 ft)........South winds 9 to 13 mph.
Mixing height.......900-2700 ft AGL decreasing to 300-600 ft AGL
                    after midnight.
Transport winds.....Southeast 7 to 15 mph.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........74     71     71     68     66     65
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TSTM COV........
TEMP............58     59     56     54     53     53
RH..............59     57     66     71     74     77
20 FT WIND......SE 13  SE 10  SE 9   S 9    S 9    S 9
20 FT WIND GUST.15     15     10     10     10     10
EYE LEVEL WIND..SE 8   SE 6   SE 5   S 5    S 5    S 5
EYE LVL WND GST.15     15     10     10     10     10
MIX HGT (FT)....2600   2200   1200   600    300    300
MIXNG WIND......SE 15  SE 13  SE 12  SE 8   SE 7   SE 7
HAINES INDEX....2      2      2      3      3      3

.FRIDAY...

Sky/weather.........Mostly cloudy (80-90 percent). Rain likely.
                    Slight chance of thunderstorms late in the
                    afternoon.
Max temperature.....Around 67.
Min humidity........59 percent.
Eye level winds.....South winds 8 to 9 mph.
Wind (20 ft)........South winds 8 to 9 mph. Gusty and erratic winds
                    expected near thunderstorms late in the
                    afternoon.
Mixing height.......300-1800 ft AGL increasing to 2500-3900 ft AGL
                    in the afternoon.
Transport winds.....South 9 to 14 mph.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
SKY (%).........80        90        90        91
WEATHER COV.....          LIKELY    LIKELY    LIKELY
WEATHER TYPE....NONE      RAIN      RAIN      RAIN
TSTM COV........
TEMP............54        58        62        66
RH..............77        72        67        61
20 FT WIND......S 8G10    S 9G15    S 9G15    S 9G15
EYE LEVEL WIND..S 5G10    S 5G15    S 5G15    S 5G15
MIX HGT (FT)....300       900       2500      3700
MIXNG WIND......SE 9      S 13      SE 10     S 13
HAINES INDEX....3         2         3         3

$$
Forecaster...Donavon
Requested by...Kari Allen
Type of request...PRESCRIBED
.TAG 1704980.0/DMX
.EMAIL kallen@cityofjohnston.com



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