171  
FNUS73 KOAX 111000  
FWSOAX  
 
SPOT FORECAST FOR HENCHAL CREEK...WOHLERS FIRE EQUIPMENT  
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE  
500 AM CDT SUN APR 11 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 CDT ON APRIL 11.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
NORTHWEST WINDS ARE EXPECTED FOR THE AREA TODAY, WITH A COLD FRONT  
EXPECTED TO PASS THROUGH FROM THE WEST THIS AFTERNOON. THE CURRENT  
TIMING FOR THE FRONT TO REACH POTTAWATTAMIE COUNTY CURRENTLY LOOKS  
TO BE AROUND 5 TO 7 PM. WITH THE PASSAGE OF THE COLD FRONT WILL  
BE A SUBSTANTIAL INCREASE IN WIND SPEED, WITH GUST VALUES REACHING  
OVER 30 MPH FROM THE NORTHWEST BEHIND THE FRONT. MINIMUM RH  
VALUES ARE EXPECTED TO FALL IN THE 25 TO 35% RANGE, WITH GOOD  
SMOKE DISPERSAL RATES THIS AFTERNOON AS MIXING HEIGHTS REACH  
AROUND 5000 FT.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY (0-5 PERCENT). AREAS OF FROST EARLY IN  
THE MORNING.  
MAX TEMPERATURE.....AROUND 66.  
MIN HUMIDITY........31 PERCENT.  
EYE LEVEL WINDS.....LIGHT WINDS BECOMING NORTHEAST AROUND 4 MPH  
LATE IN THE MORNING, THEN BECOMING LIGHT LATE  
IN THE MORNING BECOMING NORTHWEST UP TO 8 MPH  
LATE IN THE AFTERNOON.  
SURFACE WINDS (MPH).LIGHT WINDS BECOMING NORTHEAST AROUND 6 MPH  
LATE IN THE MORNING, THEN BECOMING LIGHT LATE  
IN THE MORNING BECOMING NORTHWEST 6 TO 14 MPH  
LATE IN THE AFTERNOON.  
WIND (20 FT)........LIGHT WINDS BECOMING NORTHEAST AROUND 5 MPH  
LATE IN THE MORNING, THEN BECOMING LIGHT LATE  
IN THE MORNING BECOMING NORTHWEST 5 TO 12 MPH  
LATE IN THE AFTERNOON.  
MIXING HEIGHT.......5400 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 3 MPH SHIFTING TO THE  
NORTHEAST 2 TO 3 MPH EARLY IN THE MORNING, THEN  
SHIFTING TO THE WEST 2 TO 5 MPH EARLY IN THE  
AFTERNOON INCREASING TO 14 TO 20 MPH LATE IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (700 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (77700 KNOT-FT) IN THE  
AFTERNOON.  
GFDI................MODERATE.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (CDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM  
SKY (%).........2 2 1 0 1 2  
WEATHER COV.....AREAS  
WEATHER TYPE....FROST NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............36 44 54 60 64 64  
RH..............79 68 50 37 32 35  
20 FT WIND......N 3 NE 4 NE 3 W 3 NW 6 NW 11  
20 FT WIND GUST. 6 5 4 10 14  
EYE LEVEL WIND..N 2 NE 3 NE 2 W 2 NW 4 NW 8  
EYE LVL WND GST. 4 4 3 7 10  
SURFACE WIND....N 4 NE 5 NE 4 W 4 NW 8 NW 14  
SURFACE WND GST. 7 6 5 12 17  
MIX HGT (FT)....200 500 1800 3000 4300 5400  
TRANSPORT WIND..NW 3 NE 3 NE 3 W 3 W 14 W 20  
GFDI............0 1 1 1 4 7  
HAINES INDEX....5 5 5 5 5 5  
SDSPL KT-FT/1K..1 2 2 9 54 78  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).  
MIN TEMPERATURE.....AROUND 39.  
MAX HUMIDITY........70 PERCENT.  
EYE LEVEL WINDS.....NORTHWEST WINDS 8 TO 9 MPH SHIFTING TO THE 6 TO  
12 MPH EARLY IN THE EVENING. GUSTS UP TO 33 MPH  
LATE IN THE EVENING DECREASING TO 20 MPH, THEN  
THEN 24 MPH OVERNIGHT.  
SURFACE WINDS (MPH).NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 33  
MPH LATE IN THE EVENING DECREASING TO 20 MPH,  
THEN THEN 24 MPH OVERNIGHT.  
WIND (20 FT)........NORTHWEST WINDS 9 TO 17 MPH. GUSTS UP TO 33 MPH  
LATE IN THE EVENING DECREASING TO 20 MPH, THEN  
THEN 24 MPH OVERNIGHT.  
MIXING HEIGHT.......1100 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 9 TO 25 MPH INCREASING TO 28 TO 32  
MPH.  
SMOKE DISPERSAL.....EXCELLENT (74700 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO FAIR (21800 KNOT-FT) LATE IN THE  
NIGHT.  
GFDI................HIGH DECREASING TO MODERATE LATE IN THE  
EVENING.  
HAINES INDEX........4 TO 5 OR LOW TO MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........3 5 16 13 8 6  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............62 56 51 47 44 42  
RH..............39 45 50 56 62 67  
20 FT WIND......NW 12 NW 8 NW 13 NW 8 NW 10 NW 11  
20 FT WIND GUST.16 17 24 14 18 18  
EYE LEVEL WIND..NW 9 NW 6 NW 10 NW 6 NW 8 NW 8  
EYE LVL WND GST.12 13 18 10 14 14  
SURFACE WIND....NW 15 NW 10 NW 16 NW 10 NW 13 NW 14  
SURFACE WND GST.20 21 30 17 23 23  
MIX HGT (FT)....5000 2300 1100 1400 2000 1800  
TRANSPORT WIND..NW 24 NW 24 NW 22 NW 24 NW 30 NW 31  
GFDI............8 5 9 3 4 4  
HAINES INDEX....5 5 5 5 4 4  
SDSPL KT-FT/1K..75 51 22 32 46 50  
   
MONDAY
 
 
SKY/WEATHER.........SUNNY (0-10 PERCENT).  
MAX TEMPERATURE.....AROUND 57.  
MIN HUMIDITY........29 PERCENT.  
EYE LEVEL WINDS.....NORTHWEST WINDS AROUND 9 MPH DECREASING TO 10  
TO 12 MPH EARLY IN THE MORNING. GUSTS UP TO 28  
MPH INCREASING TO 31 MPH IN THE LATE MORNING  
AND AFTERNOON.  
SURFACE WINDS (MPH).NORTHWEST WINDS 15 TO 20 MPH. GUSTS UP TO 28  
MPH INCREASING TO 31 MPH IN THE LATE MORNING  
AND AFTERNOON.  
WIND (20 FT)........NORTHWEST WINDS 13 TO 17 MPH. GUSTS UP TO 28  
MPH INCREASING TO 31 MPH IN THE LATE MORNING  
AND AFTERNOON.  
MIXING HEIGHT.......6200 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 13 TO 21 MPH INCREASING TO 23 TO 30  
MPH EARLY IN THE MORNING, THEN SHIFTING TO THE  
SOUTHWEST AROUND 31 MPH EARLY IN THE AFTERNOON  
SHIFTING TO THE NORTHWEST 29 TO 30 MPH LATE IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (26800 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (123100 KNOT-FT) IN THE  
AFTERNOON INCREASING TO EXCELLENT (139800  
KNOT-FT) LATE IN THE AFTERNOON.  
GFDI................HIGH INCREASING TO VERY HIGH IN THE AFTERNOON.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY (%).........4 2 2 3 5 6  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............40 41 45 51 55 56  
RH..............70 62 51 41 31 29  
20 FT WIND......NW 12 NW 13 NW 16 NW 16 W 16 W 16  
20 FT WIND GUST.16 19 24 23 24 25  
EYE LEVEL WIND..NW 9 NW 10 NW 12 NW 12 W 12 W 12  
EYE LVL WND GST.12 14 18 17 18 19  
SURFACE WIND....NW 15 NW 16 NW 20 NW 20 W 20 W 20  
SURFACE WND GST.20 24 30 29 30 31  
MIX HGT (FT)....1600 2000 3500 4400 5400 6200  
TRANSPORT WIND..NW 21 NW 23 NW 30 NW 28 S 31 NW 30  
GFDI............4 5 10 12 16 18  
HAINES INDEX....4 4 4 4 4 4  
SDSPL KT-FT/1K..29 43 91 114 143 162  
 

 
FORECASTER...PETERSEN  
REQUESTED BY...KODY WOHLERS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2108558.0/OAX  
.DELDT 04/11/21  
.FORMATTERVERSION 1.0.26  
 
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