418  
FNUS73 KOAX 021701  
FWSOAX  
 
SPOT FORECAST FOR HNC SOLAR...POTTAWATTAMIE CONSERVATION  
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE  
1201 PM CDT WED SEP 2 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 1200 CDT ON SEPTEMBER 02.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
..HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT FRIDAY
 
 
   
DISCUSSION
 
 
MORNING SHOWERS AND STORMS CONTINUE TO MOVE NORTHEAST OF THE AREA.  
A HOT AND HUMID AFTERNOON UNDER MOSTLY SUNNY SKIES IS EXPECTED.  
TEMPERATURES THIS AFTERNOON REACH A HIGH BETWEEN 93 AND 97. HEAT  
INDEX VALUES MAY REACH UP TO 100. A SOUTH WIND OF 5-10 MPH WITH  
GUSTS UP TO 15-20 MPH CONTINUES THROUGHOUT THE AFTERNOON AND  
EVENING. AFTERNOON MINIMUM RELATIVE HUMIDITY FALLS TO BETWEEN  
40-45%. MIXING HEIGHTS INCREASE TO BETWEEN 3000 AND 4000 FT FOR  
GOOD SMOKE DISPERSAL. TEMPERATURES REMAIN WARM TONIGHT, FALLING  
TO BETWEEN 75 AND 79. SOUTH WINDS CONTINUE, BUT MAY BECOME LIGHT  
BY THURSDAY MORNING. MAXIMUM RELATIVE HUMIDITY CLIMBS TO 70-75%.  
THERE IS A LOW (10-20%) CHANCE OF RAIN BY THURSDAY MORNING. ANY  
RAINFALL AMOUNTS SHOULD BE RELATIVELY SMALL.  
 
STRONGEST POSSIBLE 30 FT WIND SPEEDS ON DAY OF BURN: UP TO 20 MPH  
 
LOWEST POSSIBLE RELATIVE HUMIDITY ON DAY OF BURN: AS LOW AS 40%  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT).  
MAX TEMPERATURE.....AROUND 96.  
MIN HUMIDITY........43 PERCENT.  
EYE LEVEL WINDS.....SOUTH WINDS AROUND 4 MPH.  
WIND (30 FT)........SOUTH WINDS 6 TO 8 MPH.  
WIND (20 FT)........SOUTH WINDS 5 TO 7 MPH.  
MIXING HEIGHT.......4200 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 16 TO 18 MPH.  
SMOKE DISPERSAL.....FAIR (29600 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (67000 KNOT-FT) IN THE  
AFTERNOON.  
GFDI................0.  
 
TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........31 28 28 26 24 21  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............85 87 89 91 93 93  
RH..............56 52 48 45 45 44  
20 FT WIND DIR..S S S S S S  
20 FT WIND SPD..6 6 6 6 5 5  
20 FT WIND GUST.10 13 13 13 12 11  
EYE LVL WND DIR.S S S S S S  
EYE LVL WND SPD.4 4 4 4 4 4  
EYE LVL WND GST.7 10 10 10 9 8  
30 FT WND DIR...S S S S S S  
30 FT WND SPD...8 8 8 8 6 6  
30 FT WND GST...12 16 16 16 15 14  
MIX HGT (KFT)...2.1 2.6 3.0 3.8 4.2 4.0  
TRANSP WIND DIR.SW SW SW S SW S  
TRANSP WIND SPD.16 17 16 17 18 16  
GFDI............0 0 0 0 0 0  
SDSPL KT-FT/100030 39 53 65 67 51  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT). SLIGHT CHANCE OF  
SHOWERS AND THUNDERSTORMS EARLY IN THE MORNING.  
MIN TEMPERATURE.....AROUND 76.  
MAX HUMIDITY........73 PERCENT.  
EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTH AROUND 4 MPH IN THE  
LATE EVENING AND OVERNIGHT.  
WIND (30 FT)........LIGHT WINDS BECOMING SOUTH 6 TO 8 MPH IN THE  
LATE EVENING AND OVERNIGHT.  
WIND (20 FT)........SOUTH WINDS 5 TO 6 MPH EARLY IN THE EVENING  
BECOMING LIGHT, THEN BECOMING SOUTH 5 TO 6 MPH  
IN THE LATE EVENING AND OVERNIGHT. GUSTY AND  
ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS EARLY  
IN THE MORNING.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTH 12 TO 16 MPH.  
SMOKE DISPERSAL.....FAIR (27500 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (2300 KNOT-FT) LATE IN THE  
NIGHT.  
GFDI................0.  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........11 2 12 6 8 10 14 8 14 25 32 29  
WEATHER COV..... SCH  
WEATHER TYPE.... RW  
TSTM COV........ SCH  
TEMP............95 92 90 85 84 84 83 82 81 80 79 79  
RH..............43 46 49 57 59 57 60 58 60 62 64 66  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..4 3 3 4 5 6 6 6 6 6 6 6  
20 FT WIND GUST.10 6 8 10 11 12 13 14 13 13 13 13  
EYE LVL WND DIR.S S S S S S S S S S S S  
EYE LVL WND SPD.3 2 2 3 4 4 4 4 4 4 4 4  
EYE LVL WND GST.7 5 6 8 8 9 10 10 10 10 10 10  
30 FT WND DIR...S S S S S S S S S S S S  
30 FT WND SPD...5 4 4 5 6 8 8 8 8 8 8 8  
30 FT WND GST...12 8 10 13 14 15 16 17 16 16 16 16  
MIX HGT (KFT)...2.1 0.8 0.4 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.15 12 12 13 15 15 16 16 16 16 15 15  
GFDI............0 0 0 0 0 0 0 0 0 0 0 0  
SDSPL KT-FT/100028 8 2 3 6 6 6 7 7 7 7 6  
 

 
FORECASTER...CHEHAK  
REQUESTED BY...ARIC PING  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2621107.0/OAX  
.DELDT 09/02/26  
.FORMATTERVERSION 2.0.0  
.EMAIL ARIC.PING@POTTCOUNTY-IA.GOV  
 
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