041  
FNUS73 KOAX 231354 CCA  
FWSOAX  
 
SPOT FORECAST FOR WALLIS CRP SE...IOWA DNR  
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE  
846 AM CDT WED JUL 23 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON JULY 23.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT THIS  
EVENING...  
   
DISCUSSION
 
 
MOSTLY SUNNY, HOT, AND HUMID CONDITIONS WILL PREVAIL THROUGH THE  
BURN TIME TODAY. TEMPERATURE AT IGNITION WILL BE 83-85 DEGREES IN  
THE SHADE, MUCH WARMER IN THE SUNNY AREAS. DEWPOINTS ARE IN THE  
LOW TO MID 70S ALL DAY, WHICH WILL KEEP RH IN THE 50-70% RANGE  
EVEN WITH THE HOT TEMPERATURES (LOWER RH IN THE SUNNY AREAS). DO  
EXPECT WINDS GUSTING OUT OF THE SOUTH AT 18-24 MPH (AT 30 FOOT,  
LESS AT EYE LEVEL). SMOKE DISPERSAL WILL BE FAIR EARLY, BUT SHOULD  
BECOME QUITE GOOD BY NOON AS MIXING HEIGHTS INCREASE AND WINDS  
BELOW THE INVERSION ALSO INCREASE A BIT. THUNDERSTORMS WILL IMPACT  
THE BURN SITE BETWEEN 7 AND 10 PM. EXPECT STRONG NORTHWESTERLY WIND  
GUSTS WITH THE ARRIVAL OF THE STORMS, ALONG WITH LIGHTNING AND RAIN.  
 
STRONGEST POSSIBLE WIND SPEEDS ON DAY OF BURN: 25 MPH GUST  
 
LOWEST POSSIBLE RELATIVE HUMIDITY ON DAY OF BURN: 50%, ALTHOUGH  
LOWER IN SUN-DRENCHED AREAS.  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY (0-10 PERCENT).  
MAX TEMPERATURE.....AROUND 94.  
MIN HUMIDITY........56 PERCENT.  
EYE LEVEL WINDS.....SOUTH WINDS 7 TO 8 MPH WITH GUSTS TO AROUND 14  
MPH.  
SURFACE WINDS (MPH).SOUTH WINDS 11 TO 13 MPH WITH GUSTS TO AROUND  
23 MPH.  
WIND (20 FT)........SOUTH WINDS 9 TO 12 MPH WITH GUSTS TO AROUND 18  
MPH.  
MIXING HEIGHT.......3800 FT AGL.  
TRANSPORT WINDS.....SOUTH 18 TO 22 MPH.  
SMOKE DISPERSAL.....FAIR (23100 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (72800 KNOT-FT) IN THE  
AFTERNOON.  
GFDI................0.  
 
TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........6 3 5 2 2 4 6 8  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............82 85 87 90 92 92 93 91  
RH..............72 67 68 64 58 58 56 60  
20 FT WIND DIR..S S S S S S S S  
20 FT WIND SPD..10 10 10 10 10 10 10 9  
20 FT WIND GUST.18 18 18 18 18 18 18 17  
EYE LVL WND DIR.S S S S S S S S  
EYE LVL WND SPD.8 8 8 8 8 8 8 7  
EYE LVL WND GST.14 14 13 13 13 13 13 13  
SURFACE WND DIR.S S S S S S S S  
SURFACE WND SPD.13 13 13 13 13 13 13 11  
SURFACE WND GST.23 23 22 22 22 22 22 21  
MIX HGT (KFT)...1.4 1.9 2.1 2.5 3.2 3.6 3.8 3.1  
TRANSP WIND DIR.S S S S S S S S  
TRANSP WIND SPD.18 20 18 20 21 22 22 20  
GFDI............0 0 0 0 0 0 0 0  
SDSPL KT-FT/100023 29 35 42 56 69 73 59  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (75-85 PERCENT). SHOWERS AND  
THUNDERSTORMS IN THE EVENING, THEN SHOWERS AND  
THUNDERSTORMS LIKELY OVERNIGHT.  
MIN TEMPERATURE.....AROUND 68.  
MAX HUMIDITY........100 PERCENT.  
EYE LEVEL WINDS.....SOUTH WINDS UP TO 6 MPH WITH GUSTS TO AROUND 12  
MPH EARLY IN THE EVENING SHIFTING TO THE WEST  
AROUND 6 MPH, THEN SHIFTING TO THE NORTH AROUND  
4 MPH LATE IN THE EVENING SHIFTING TO THE  
NORTHEAST SHIFTING TO THE SOUTHEAST OVERNIGHT  
BECOMING LIGHT.  
SURFACE WINDS (MPH).SOUTH WINDS 8 TO 10 MPH WITH GUSTS TO AROUND 20  
MPH EARLY IN THE EVENING SHIFTING TO THE WEST  
AROUND 10 MPH, THEN SHIFTING TO THE NORTH  
AROUND 8 MPH LATE IN THE EVENING SHIFTING TO  
THE NORTHEAST SHIFTING TO THE SOUTHEAST AROUND  
6 MPH OVERNIGHT BECOMING LIGHT.  
WIND (20 FT)........SOUTH WINDS 5 TO 6 MPH WITH GUSTS TO AROUND 16  
MPH EARLY IN THE EVENING SHIFTING TO THE EAST  
AROUND 6 MPH, THEN SHIFTING TO THE NORTHWEST  
AROUND 5 MPH LATE IN THE EVENING SHIFTING TO  
THE NORTHEAST SHIFTING TO THE SOUTHEAST  
OVERNIGHT BECOMING LIGHT. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE  
EVENING.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTH 14 TO 17 MPH SHIFTING TO THE NORTHWEST  
LATE IN THE EVENING, THEN SHIFTING TO THE EAST  
AROUND 10 MPH OVERNIGHT SHIFTING TO THE WEST  
AROUND 12 MPH OVERNIGHT SHIFTING TO THE NORTH  
AROUND 15 MPH SHIFTING TO THE EAST AROUND 8 MPH  
AFTER 3 AM SHIFTING TO THE SOUTHEAST SHIFTING  
TO THE SOUTHWEST AROUND 5 MPH EARLY IN THE  
MORNING.  
SMOKE DISPERSAL.....GOOD (37300 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (2500 KNOT-FT) LATE IN THE  
NIGHT.  
GFDI................0.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........24 67 87 83 86 85  
WEATHER COV..... CHANCE LIKELY LIKELY LIKELY LIKELY  
WEATHER TYPE....NONE RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........ CHANCE LIKELY LIKELY LIKELY LIKELY  
TEMP............90 84 77 72 71 70  
RH..............64 74 90 100 93 97  
20 FT WIND......S 8 S 6 W 8 NE 6 SE 5 S 4  
20 FT WIND GUST.16 13 14 10 8 8  
EYE LEVEL WIND..S 6 S 4 W 6 NE 4 SE 4 S 3  
EYE LVL WND GST.12 10 11 7 6 6  
SURFACE WIND....S 10 S 8 W 10 NE 8 SE 6 S 5  
SURFACE WND GST.20 16 18 12 10 10  
MIX HGT (FT)....2300 400 400 400 500 400  
TRANSPORT WIND..S 17 S 14 W 12 E 10 N 15 SE 8  
GFDI............0 0 0 0 0 0  
SDSPL KT-FT/100037 9 4 4 4 3  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SHOWERS AND  
THUNDERSTORMS LIKELY IN THE MORNING, THEN  
CHANCE OF SHOWERS AND THUNDERSTORMS IN THE  
AFTERNOON.  
MAX TEMPERATURE.....AROUND 81.  
MIN HUMIDITY........72 PERCENT.  
EYE LEVEL WINDS.....LIGHT WINDS BECOMING NORTH AROUND 4 MPH IN THE  
AFTERNOON.  
SURFACE WINDS (MPH).LIGHT WINDS BECOMING NORTH AROUND 6 MPH IN THE  
AFTERNOON.  
WIND (20 FT)........LIGHT WINDS BECOMING NORTH AROUND 5 MPH IN THE  
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED  
NEAR THUNDERSTORMS EARLY IN THE MORNING. GUSTY  
AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS  
IN THE LATE MORNING AND AFTERNOON.  
MIXING HEIGHT.......2700 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 6 TO 7 MPH SHIFTING TO THE NORTH IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (2200 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO FAIR (15900 KNOT-FT) IN THE  
AFTERNOON.  
GFDI................0.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).........82 74 72 66 70 67  
WEATHER COV.....LIKELY CHANCE CHANCE CHANCE CHANCE CHANCE  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........LIKELY CHANCE S CHC S CHC S CHC CHANCE  
TEMP............69 71 75 77 80 81  
RH..............97 93 87 82 74 72  
20 FT WIND......W 4 W 3 NW 4 N 5 N 5 N 5  
20 FT WIND GUST.6 6 7 10 10 8  
EYE LEVEL WIND..W 3 W 2 NW 3 N 4 N 4 N 4  
EYE LVL WND GST.5 5 5 7 7 6  
SURFACE WIND....W 5 W 4 NW 5 N 6 N 6 N 6  
SURFACE WND GST.8 8 9 12 12 10  
MIX HGT (FT)....700 700 1300 1900 2500 2600  
TRANSPORT WIND..SW 7 SW 7 W 6 NW 7 N 6 N 7  
GFDI............0 0 0 0 0 0  
SDSPL KT-FT/10002 4 6 9 13 16  
 

 
FORECASTER...BARJENBRUCH  
REQUESTED BY...JEFF SEAGO  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2518451.0/OAX  
.DELDT 07/23/25  
.FORMATTERVERSION 2.0.0  
.EMAIL JEFFREY.SEAGO@DNR.IOWA.GOV  
 
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