692  
FNUS73 KDMX 201403  
FWSDMX  
 
SPOT FORECAST FOR LEDGES STATE PARK...IOWA DNR  
NATIONAL WEATHER SERVICE DES MOINES IA  
803 AM CST WED DEC 20 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CST ON DECEMBER 20.  
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
 
 
PARTLY SUNNY SKIES WITH DRY AND MILD CONDITIONS ARE EXPECTED TODAY  
WITH EAST WINDS OF 5 TO 10 MPH.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT).  
TEMPERATURE.........28 AT IGNITION...MAX 41.  
RH..................58 PERCENT AT IGNITION...MIN 36 PERCENT.  
WIND (20 FT)........WINDS EAST AT 9 MPH AT IGNITION...OTHERWISE  
SOUTHEAST WINDS 9 TO 13 MPH.  
MIXING HEIGHT.......900 FT AGL AT IGNITION...OTHERWISE 900-2200 FT  
AGL.  
TRANSPORT WINDS.....SOUTHEAST 10 TO 14 MPH IN THE LATE MORNING AND  
EARLY AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH AT IGNITION...MAX 4 IN THE LATE  
MORNING AND EARLY AFTERNOON.  
 
TIME (CST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........60 60 60 54 48 43 50 58  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............28 32 37 40 41 41 39 36  
RH..............58 49 42 37 36 36 39 45  
20 FT WIND DIR..E E E SE SE SE SE SE  
20 FT WIND SPD..9 10 12 13 13 13 13 12  
20 FT WIND GUST.10 15 15 15 15 15 15 15  
MIX HGT (KFT)...0.9 1.5 2.1 2.1 2.2 2.2 1.7 1.2  
MIXNG WIND DIR..E E E E SE SE M M  
MIXNG WIND SPD..10 12 13 14 14 14 M M  
HAINES INDEX....4 4 4 4 4 4 M M  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF  
LIGHT SLEET EARLY IN THE MORNING. SLIGHT CHANCE  
OF LIGHT FREEZING DRIZZLE EARLY IN THE MORNING.  
TEMPERATURE.........MIN 30.  
RH..................MAX 78 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 7 TO 12 MPH.  
MIXING HEIGHT.......0-700 FT AGL.  
TRANSPORT WINDS.....  
HAINES INDEX........MISSING.  
 
TIME (CST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........65 78 88 95 94 94  
WEATHER COV..... S CHC  
WEATHER TYPE....NONE NONE NONE NONE NONE SLEET  
TSTM COV........  
TEMP............33 32 31 31 31 31  
RH..............51 56 61 63 66 69  
20 FT WIND......SE 12 SE 12 SE 10 SE 10 SE 9 SE 8  
20 FT WIND GUST.15 15 15 15 10 10  
MIX HGT (FT)....700 700 500 BLW100 BLW100 BLW100  
MIXNG WIND......M M M M M M  
HAINES INDEX....M M M M M M  
   
THURSDAY
 
 
SKY/WEATHER.........CLOUDY (90-100 PERCENT). CHANCE OF LIGHT  
FREEZING DRIZZLE EARLY IN THE MORNING, THEN  
CHANCE OF DRIZZLE EARLY IN THE MORNING. CHANCE  
OF LIGHT FREEZING DRIZZLE LATE IN THE  
AFTERNOON.  
TEMPERATURE.........MAX 36.  
RH..................MIN 66 PERCENT.  
WIND (20 FT)........NORTH WINDS 5 TO 14 MPH WITH GUSTS TO AROUND 25  
MPH.  
MIXING HEIGHT.......0 FT AGL.  
TRANSPORT WINDS.....  
HAINES INDEX........MISSING.  
 
TIME (CST) 6 AM 9 AM NOON 3 PM  
SKY (%).........95 96 96 96  
WEATHER COV.....CHANCE CHANCE CHANCE CHANCE  
WEATHER TYPE....FZDRZL DRZL DRZL DRZL  
TSTM COV........  
TEMP............32 33 36 34  
RH..............72 82 75 75  
20 FT WIND......SE 6 E 5 N 9G10 N 14G20  
MIX HGT (FT)....BLW100 BLW100 BLW100 BLW100  
MIXNG WIND......M M M M  
HAINES INDEX....M M M M  
 

 
FORECASTER...PODRAZIK  
REQUESTED BY...ANDY BARTLETT  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1720124.0/DMX  
.EMAIL ANDY.BARTLETT@DNR.IOWA.GOV  
 
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