743  
FNUS73 KDMX 210903  
FWSDMX  
 
SPOT FORECAST FOR USFWS FEDERAL FIRE TRAINING EXERCISE...USFWS  
NATIONAL WEATHER SERVICE DES MOINES IA  
403 AM CDT SUN OCT 21 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON OCTOBER 21.  
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
 
 
GENERALLY SEASONAL BUT DRY WEATHER IS FORECAST FROM TODAY THROUGH  
WEDNESDAY AFTERNOON. GUSTY SOUTH WINDS WILL DEVELOP LATE THIS  
MORNING AND AFTERNOON OVER THE REGION WITH MINIMUM RH NEAR 40  
PERCENT. THE NEXT CHANCE FOR WETTING RAINFALL WILL BE WEDNESDAY  
NIGHT AND THURSDAY MAINLY OVER CENTRAL AND WESTERN IOWA. MORE  
CHANCES FOR LIGHT RAIN WILL OCCUR FRIDAY AND SATURDAY OVER THE  
ENTIRE REGION.  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY (0-10 PERCENT).  
MAX TEMPERATURE.....AROUND 58.  
MIN HUMIDITY........38 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 12 TO 17 MPH.  
MIXING HEIGHT.......1600-2600 FT AGL.  
TRANSPORT WINDS.....SOUTH 17 TO 22 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) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........1 2 3 4 5 6 7 8  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............40 44 48 52 55 57 58 57  
RH..............59 53 46 41 38 38 39 42  
20 FT WIND DIR..S S S S S SW SW SW  
20 FT WIND SPD..12 14 15 16 17 17 17 15  
20 FT WIND GUST.14 18 21 23 24 25 24 22  
MIX HGT (KFT)...1.6 2.0 2.3 2.6 2.6 2.6 2.5 2.3  
TRANSP WIND DIR.SW SW S S S S S S  
TRANSP WIND SPD.22 22 21 20 21 22 22 17  
HAINES INDEX....4 4 3 3 3 4 4 4  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).  
MIN TEMPERATURE.....AROUND 40.  
MAX HUMIDITY........85 PERCENT.  
WIND (20 FT)........WEST WINDS 5 TO 13 MPH.  
MIXING HEIGHT.......300-2000 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 3 TO 10 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 (%).........10 9 6 13 19 22  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............55 50 47 46 45 42  
RH..............47 58 68 73 76 82  
20 FT WIND......S 13 S 9 S 7 SW 7 SW 6 W 5  
20 FT WIND GUST.18  
MIX HGT (FT)....2000 1300 300 300 300 300  
TRANSPORT WIND..S 10 S 5 S 6 S 5 SW 5 SW 3  
HAINES INDEX....4 4 3 3 3 3  
   
MONDAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT).  
MAX TEMPERATURE.....AROUND 62.  
MIN HUMIDITY........42 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 5 TO 8 MPH.  
MIXING HEIGHT.......0-300 FT AGL.  
TRANSPORT WINDS.....WEST AROUND 2 MPH EARLY IN THE MORNING.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH EARLY IN THE MORNING.  
 
TIME (CDT) 6 AM 9 AM NOON 3 PM  
SKY (%).........26 20 10 3  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
TSTM COV........  
TEMP............40 44 55 62  
RH..............85 79 57 43  
20 FT WIND......NW 5 NW 5 NW 6 NW 8  
MIX HGT (FT)....300 100 BLW100 BLW100  
TRANSPORT WIND..W 2 M M M  
HAINES INDEX....4 M M M  
 

 
FORECASTER...VACHALEK  
REQUESTED BY...RYAN HARR  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1817170.0/DMX  
.DELDT 10/21/18  
.EMAIL RYAN.HARR@DNR.IOWA.GOV  
 
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