507  
FNUS73 KOAX 281350  
FWSOAX  
 
SPOT FORECAST FOR KRESS RX FIRE UNITS...IOWA DNR  
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE  
850 AM CDT THU MAR 28 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON MARCH 28.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
A STATIONARY FRONT LIES IN THE VICINITY OF OMAHA/BLAIR AREA THIS  
MORNING. WINDS NEAR THE FRONT WILL BE LIGHT AND VARIABLE. I EXPECT  
THE FRONT TO SLIP SLOWLY SOUTH THROUGH THE DAY.  
 
NORTH OF THE FRONT - CLOSER TO THE FIRE - WINDS WILL PRIMARILY BE  
OUT OF THE EAST THIS MORNING WITH AN INCREASING SOUTHERLY  
COMPONENT, THOUGH REMAIN AT 5-10 MPH.  
 
A COLD FRONT WILL PASS THROUGH FROM NORTHWEST TO SOUTHEAST ON  
FRIDAY, WITH WINDS SHIFTING FROM SOUTHERLY TO NORTHWESTERLY. A FEW  
GUSTS OF 20 TO 25 MPH MAY BE SEEN ON EITHER SIDE OF THE FRONT,  
BUT NEAR THE FRONT, WINDS WILL REMAIN 5 TO 10 MPH. RH VALUES  
SHOULD ONCE AGAIN BE IN THE 30 TO 50 PERCENT RANGE.  
 
STRONGEST POSSIBLE WIND SPEEDS ON DAY OF BURN: 8-10 MPH  
 
LOWEST POSSIBLE RELATIVE HUMIDITY ON DAY OF BURN: 42%  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT).  
MAX TEMPERATURE.....AROUND 58.  
MIN HUMIDITY........47 PERCENT.  
EYE LEVEL WINDS.....SOUTHEAST WINDS AROUND 4 MPH.  
SURFACE WINDS (MPH).SOUTHEAST WINDS AROUND 8 MPH.  
WIND (20 FT)........SOUTHEAST WINDS 6 TO 7 MPH.  
MIXING HEIGHT.......3300 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 9 TO 12 MPH.  
SMOKE DISPERSAL.....FAIR (15400 KNOT-FT).  
GFDI................3.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........12 11 9 11 14 16 17  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............42 47 50 53 55 56 57  
RH..............62 58 56 52 49 47 47  
20 FT WIND DIR..E E SE SE SE SE SE  
20 FT WIND SPD..6 6 6 6 6 6 6  
20 FT WIND GUST.  
EYE LVL WND DIR.E E SE SE SE SE SE  
EYE LVL WND SPD.4 4 4 4 4 4 4  
EYE LVL WND GST.5 5 5 5 5  
SURFACE WND DIR.E E SE SE SE SE SE  
SURFACE WND SPD.8 8 8 8 8 8 8  
SURFACE WND GST.  
MIX HGT (KFT)...1.4 2.0 2.4 2.8 3.1 3.3 3.1  
TRANSP WIND DIR.E E E SE SE SE SE  
TRANSP WIND SPD.12 12 10 10 10 10 9  
GFDI............2 2 2 2 3 2 2  
HAINES INDEX....5 5 5 5 5 5 5  
SDSPL KT-FT/100015 19 22 26 30 30 22  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (60-70 PERCENT).  
MIN TEMPERATURE.....AROUND 39.  
MAX HUMIDITY........82 PERCENT.  
EYE LEVEL WINDS.....SOUTHEAST WINDS UP TO 7 MPH.  
SURFACE WINDS (MPH).SOUTHEAST WINDS 6 TO 11 MPH.  
WIND (20 FT)........EAST WINDS 5 TO 10 MPH.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 8 TO 17 MPH.  
SMOKE DISPERSAL.....POOR (2300 KNOT-FT).  
GFDI................3.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........16 24 42 40 49 72  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............57 50 43 42 41 40  
RH..............47 61 73 76 79 82  
20 FT WIND......E 5 E 6 E 8 E 9 E 9 SE 8  
20 FT WIND GUST. 10 12 12 10  
EYE LEVEL WIND..E 4 E 4 E 6 E 7 E 7 SE 6  
EYE LVL WND GST. 5 8 9 9 7  
SURFACE WIND....E 6 E 8 E 10 E 11 E 11 SE 10  
SURFACE WND GST. 13 15 15 12  
MIX HGT (FT)....2800 400 500 500 500 400  
TRANSPORT WIND..SE 8 E 12 E 16 SE 17 SE 17 SE 16  
GFDI............2 2 2 3 3 2  
HAINES INDEX....5 5 5 5 5 5  
SDSPL KT-FT/100012 2 6 7 7 6  
   
FRIDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT).  
MAX TEMPERATURE.....AROUND 63.  
MIN HUMIDITY........46 PERCENT.  
EYE LEVEL WINDS.....SOUTH WINDS 6 TO 8 MPH SHIFTING TO THE WEST UP  
TO 5 MPH LATE IN THE AFTERNOON.  
SURFACE WINDS (MPH).SOUTHEAST WINDS AROUND 10 MPH SHIFTING TO THE  
WEST 8 TO 9 MPH LATE IN THE AFTERNOON.  
WIND (20 FT)........SOUTHEAST WINDS AROUND 9 MPH SHIFTING TO THE  
WEST 7 TO 8 MPH LATE IN THE AFTERNOON.  
MIXING HEIGHT.......4000 FT AGL.  
TRANSPORT WINDS.....SOUTH 12 TO 20 MPH SHIFTING TO THE SOUTHWEST 8  
TO 12 MPH LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (5200 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (34500 KNOT-FT) IN THE  
AFTERNOON.  
GFDI................3.  
HAINES INDEX........4 TO 5 OR LOW TO MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).........53 53 72 74 74 72  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............40 44 51 57 62 63  
RH..............82 79 74 62 52 46  
20 FT WIND......SE 8 SE 9 S 11 S 9 S 7 W 6  
20 FT WIND GUST.10 12 14 11  
EYE LEVEL WIND..SE 6 SE 7 S 8 S 7 S 5 W 4  
EYE LVL WND GST.7 9 10 8 5  
SURFACE WIND....SE 10 SE 11 S 14 S 11 S 9 W 8  
SURFACE WND GST.12 15 17 14  
MIX HGT (FT)....500 500 1600 2700 3300 4000  
TRANSPORT WIND..SE 15 S 17 S 20 S 16 S 12 SW 8  
GFDI............2 3 4 4 3 3  
HAINES INDEX....5 5 5 5 4 4  
SDSPL KT-FT/10005 13 28 34 33 28  
 

 
FORECASTER...NICOLAISEN  
REQUESTED BY...JEFF SEAGO  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2408744.0/OAX  
.DELDT 03/28/24  
.FORMATTERVERSION 2.0.0  
.EMAIL JEFFREY.SEAGO@DNR.IOWA.GOV  
 
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