534  
FNUS73 KOAX 271233  
FWSOAX  
 
SPOT FORECAST FOR UNIT 6...USFWS  
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE  
733 AM CDT THU APR 27 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 CDT ON APRIL 27.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
WEAK HIGH PRESSURE WILL BUILD INTO THE AREA TODAY. TEMPERATURES WILL  
REMAIN COOL. RAIN CHANCES RETURN FOR TONIGHT AND THEN CONTINUE THE  
NEXT SEVERAL DAYS.  
   
REST OF TODAY
 
 
SKY/WEATHER.........CLOUDY (85-95 PERCENT) THEN BECOMING PARTLY  
SUNNY (45-55 PERCENT). PATCHY FROST EARLY IN  
THE MORNING.  
TEMPERATURE.........36 AT IGNITION...MAX 57.  
RH..................80 PERCENT AT IGNITION...MIN 42 PERCENT.  
WIND (20 FT)........WINDS NORTHWEST AT 8 MPH AT  
IGNITION...OTHERWISE NORTHWEST WINDS 5 TO 8  
MPH.  
MIXING HEIGHT.......1000 FT AGL AT IGNITION...OTHERWISE 1000-2700  
FT AGL INCREASING TO 2800-4100 FT AGL LATE IN  
THE MORNING, THEN DECREASING TO 1400 FT AGL  
LATE IN THE AFTERNOON.  
TRANSPORT WINDS.....WEST 7 TO 16 MPH.  
SMOKE DISPERSAL.....FAIR /13500 KNOT-FT/ AT IGNITION. MAX...GOOD  
/35800 KNOT-FT/.  
GFDI (MAX)..........LOW.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH AT IGNITION...MAX 3.  
 
TIME (CDT) 8 AM 10 AM NOON 2 PM 4 PM 6 PM  
SKY (%).........99 79 63 41 44 60  
WEATHER COV.....PATCHY  
WEATHER TYPE....FROST NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............36 41 47 52 56 57  
RH..............80 67 58 50 45 42  
20 FT WIND......NW 8 NW 8 NW 8 NW 6 NW 6 NW 5  
20 FT WIND GUST.10 15 10 10 10  
MIX HGT (FT)....1000 2200 3000 3700 3900 1400  
TRANSPORT WIND..NW 16 NW 15 W 14 W 10 W 7 W 8  
GFDI............0 0 0 0 0 0  
HAINES INDEX....2 2 3 3 3 3  
SDSPL KT-FT/100014 29 36 34 24 8  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF  
RAIN SHOWERS AFTER MIDNIGHT. CHANCE OF RAIN  
SHOWERS EARLY IN THE MORNING.  
TEMPERATURE.........MIN 42.  
RH..................MAX 86 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING NORTHEAST 6 TO 7 MPH AFTER  
MIDNIGHT.  
MIXING HEIGHT.......0-600 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 9 MPH SHIFTING TO THE  
NORTHEAST EARLY IN THE EVENING, THEN INCREASING  
TO 17 TO 18 MPH EARLY IN THE MORNING.  
SMOKE DISPERSAL.....POOR (200 KNOT-FT).  
GFDI (MAX)..........LOW.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM  
SKY (%).........68 80 86 87 93 93  
WEATHER COV..... S CHC CHANCE  
WEATHER TYPE....NONE NONE NONE NONE RNSHWR RNSHWR  
TSTM COV........  
TEMP............56 53 50 48 46 44  
RH..............44 52 64 71 77 79  
20 FT WIND......W 4 NE 4 E 3 NE 3 NE 6 NE 7  
20 FT WIND GUST.5 5 5 5 10 10  
MIX HGT (FT)....300 100 200 300 500 400  
TRANSPORT WIND..W 9 NE 9 E 8 NE 7 NE 14 NE 18  
GFDI............0 0 0 0 0 0  
HAINES INDEX....3 3 3 3 3 3  
SDSPL KT-FT/10002 1 1 2 7 6  
   
FRIDAY
 
 
SKY/WEATHER.........CLOUDY (90-100 PERCENT). RAIN SHOWERS LIKELY.  
TEMPERATURE.........MAX 48.  
RH..................MIN 65 PERCENT.  
WIND (20 FT)........NORTHEAST WINDS 7 TO 12 MPH.  
MIXING HEIGHT.......300-2200 FT AGL INCREASING TO 2600 FT AGL LATE  
IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHEAST 18 TO 26 MPH INCREASING TO 26 TO 31  
MPH IN THE LATE MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....POOR TO GOOD (3900-53300 KNOT-FT) INCREASING TO  
EXCELLENT (66300 KNOT-FT) LATE IN THE  
AFTERNOON.  
GFDI (MAX)..........LOW.  
HAINES INDEX........2 TO 3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
TIME (CDT) 7 AM 9 AM 11 AM 1 PM 3 PM 5 PM  
SKY (%).........98 98 99 99 97 95  
WEATHER COV.....LIKELY LIKELY LIKELY LIKELY LIKELY LIKELY  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........  
TEMP............43 42 42 42 41 44  
RH..............80 86 86 83 87 80  
20 FT WIND......NE 7 NE 11 NE 12 NE 11 NE 11 NE 9  
20 FT WIND GUST.10 20 20 20 20 15  
MIX HGT (FT)....300 900 1400 1400 1600 2200  
TRANSPORT WIND..NE 18 NE 26 NE 31 NE 29 NE 26 NE 28  
GFDI............0 0 0 0 0 0  
HAINES INDEX....3 3 3 2 3 3  
SDSPL KT-FT/10004 24 37 37 38 53  
 

 
FORECASTER...MILLER  
REQUESTED BY...SAM VANOURNEY  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1707860.0/OAX  
 
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