Suppression Forecast
Issued by NWS Des Moines, IA

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Spot Forecast for Chodur-Irons...Worth County Conservation
National Weather Service Des Moines IA
912 PM CST Sun Dec 10 2017

Forecast is based on ignition time of 0900 CST on December 11.
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...

Clouds will thicken and scattered rain and/or snow showers may
arrive by later in the morning into the afternoon. Winds from the
southwest early in the day will become gusty from the northwest by
mid-morning continuing into the evening. Minimum relative
humidities Monday afternoon will be around 80% with good recovery
Monday night.

Temperatures will be above freezing from 11 am to around 2 pm
Monday. Observed frost depths of several inches have been reported
across the area, though local conditions may vary.

.MONDAY...

Sky/weather.........Cloudy (85-95 percent). Slight chance of rain
                    late in the morning. Chance of snow through the
                    day. Chance of rain in the afternoon.
Max temperature.....Around 35.
Min humidity........81 percent.
Wind (20 ft)........Northwest winds 12 to 20 mph.
Mixing height.......1100-2700 ft AGL.
Transport winds.....Northwest 17 to 23 mph increasing to north 28
                    to 36 mph late in the morning.
Haines Index........2 to 4 or very low potential for large plume
                    dominated fire growth to low potential for
                    large plume dominated fire growth.

TIME (CST)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........83  87  92  96  94  92  90  85  81
WEATHER COV.....SCH CHC CHC CHC CHC CHC SCH SCH SCH
WEATHER TYPE....SN  SN  SN  RN  SN  SN  SN  SN  SN
TSTM COV........
TEMP............31  32  34  35  34  34  32  31  28
RH..............85  85  82  82  82  82  85  81  88
20 FT WIND DIR..W   NW  NW  NW  NW  NW  NW  NW  N
20 FT WIND SPD..12  14  16  18  20  20  20  20  20
20 FT WIND GUST.    20  25  30  30  30  30  30  30
MIX HGT (KFT)...1.1 1.6 2.1 2.6 2.2 1.8 1.4 2.0 2.7
MIXNG WIND DIR..W   NW  NW  NW  NW  N   N   N   N
MIXNG WIND SPD..17  23  28  32  35  36  36  36  36
HAINES INDEX....3   3   2   2   2   3   3   3   4

.MONDAY NIGHT...

Sky/weather.........Mostly cloudy (60-70 percent) then becoming
                    partly cloudy (35-45 percent).
Min temperature.....Around 12.
Max humidity........91 percent.
Wind (20 ft)........Northwest winds 15 to 23 mph.
Mixing height.......1400-3300 ft AGL decreasing to 300-800 ft AGL
                    after midnight.
Transport winds.....Northwest 28 to 36 mph decreasing to 21 to 25
                    mph after midnight.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CST)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........76     55     47     42     32     31
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TSTM COV........
TEMP............28     24     21     18     15     13
RH..............81     84     84     84     88     87
20 FT WIND......NW 23  NW 23  NW 21  NW 17  NW 15  NW 15
20 FT WIND GUST.30     30     30     25     20     20
MIX HGT (FT)....3300   2800   2300   2000   800    300
MIXNG WIND......N 36   NW 35  NW 32  NW 30  NW 25  NW 22
HAINES INDEX....4      4      4      4      4      4

.TUESDAY...

Sky/weather.........Mostly sunny (40-50 percent).
Max temperature.....Around 26.
Min humidity........60 percent.
Wind (20 ft)........Northwest winds 10 to 15 mph.
Mixing height.......300-2200 ft AGL increasing to 2300-2800 ft AGL
                    in the afternoon.
Transport winds.....Northwest 12 to 20 mph shifting to the west
                    around 9 mph late in the afternoon.
Haines Index........3 to 4 or very low potential for large plume
                    dominated fire growth to low potential for
                    large plume dominated fire growth.

TIME (CST)      6 AM      9 AM      NOON      3 PM
SKY (%).........39        35        49        56
WEATHER COV.....
WEATHER TYPE....NONE      NONE      NONE      NONE
TSTM COV........
TEMP............12        14        23        26
RH..............87        88        65        62
20 FT WIND......NW 15G20  NW 14G20  NW 14G20  NW 14G20
MIX HGT (FT)....300       1100      2800      2800
MIXNG WIND......NW 20     NW 18     NW 20     NW 14
HAINES INDEX....4         4         4         4

$$
Forecaster...Ansorge
Requested by...Brett Backhaus
Type of request...PRESCRIBED
.TAG 1719801.0/DMX
.EMAIL brett.backhaus@worthcounty.org



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