447  
FNUS73 KDMX 221317  
FWSDMX  
 
SPOT FORECAST FOR STRUEKER...IOWA DNR  
NATIONAL WEATHER SERVICE DES MOINES IA  
817 AM CDT TUE MAY 22 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON MAY 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
 
 
AREAS OF DENSE FOG LOOK TO BURN OFF THROUGH THE MORNING HOURS  
TODAY. LIGHT AND VARIABLE WINDS ARE EXPECTED TO COME AROUND TO  
SOUTHEAST AT 5 TO 10 MPH LATER TODAY. RELATIVE HUMIDITY WILL  
REMAIN FAIRLY HIGH IN THE MORNING, THEN DECREASE TO 50 TO 60  
PERCENT IN THE AFTERNOON.  
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT).  
TEMPERATURE.........61 AT IGNITION...MAX 79.  
RH..................87 PERCENT AT IGNITION...MIN 49 PERCENT.  
WIND (20 FT)........WINDS SOUTHEAST AT 2 MPH AT  
IGNITION...OTHERWISE LIGHT WINDS BECOMING  
SOUTHEAST 5 TO 7 MPH IN THE AFTERNOON.  
MIXING HEIGHT.......1500 FT AGL AT IGNITION...OTHERWISE 1500-3200  
FT AGL INCREASING TO 4300-6000 FT AGL IN THE  
AFTERNOON.  
TRANSPORT WINDS.....SOUTH 2 TO 10 MPH.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH AT IGNITION...MAX 4.  
 
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........72 59 53 47 41 37 33 29 35  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............61 65 68 71 74 76 78 79 79  
RH..............87 78 70 63 57 54 50 49 49  
20 FT WIND DIR..SE SE SE SE S S SE SE SE  
20 FT WIND SPD..2 3 3 5 6 7 7 7 7  
20 FT WIND GUST.  
MIX HGT (KFT)...1.5 2.2 3.2 4.3 5.3 5.6 5.8 6.0 5.8  
TRANSP WIND DIR.SE E SE SE S S S S S  
TRANSP WIND SPD.2 2 2 2 2 3 6 8 10  
HAINES INDEX....2 2 2 3 3 3 4 4 4  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF  
SHOWERS AND THUNDERSTORMS IN THE EVENING, THEN  
SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.  
TEMPERATURE.........MIN 61.  
RH..................MAX 100 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 7 TO 9 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE  
EVENING.  
MIXING HEIGHT.......3600-5500 FT AGL DECREASING TO 300-1900 FT AGL  
IN THE LATE EVENING AND OVERNIGHT.  
TRANSPORT WINDS.....SOUTHEAST 6 TO 15 MPH.  
HAINES INDEX........3 TO 4 OR OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH TO OR LOW POTENTIAL FOR  
LARGE PLUME DOMINATED FIRE GROWTH.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........42 53 62 73 80 83  
WEATHER COV..... S CHC S CHC LIKELY LIKELY DEFNTE  
WEATHER TYPE....NONE RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........ S CHC S CHC LIKELY LIKELY DEFNTE  
TEMP............79 75 70 67 65 62  
RH..............49 58 71 78 87 97  
20 FT WIND......SE 8 SE 7 SE 7 SE 7 SE 8 SE 8  
20 FT WIND GUST.  
MIX HGT (FT)....5500 3600 300 300 300 300  
TRANSPORT WIND..S 13 SE 10 SE 6 SE 13 S 13 SE 7  
HAINES INDEX....4 4 3 3 3 3  
 

 
FORECASTER...PODRAZIK  
REQUESTED BY...ROB PATTERSON  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1810469.0/DMX  
.DELDT 05/22/18  
.EMAIL ROB.PATTERSON@DNR.IOWA.GOV  
 
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