FNUS73 KFGF 121256 FWSFGF SPOT FORECAST FOR AGASSIZ...USFWS AGASSIZ NWR NATIONAL WEATHER SERVICE GRAND FORKS ND 756 AM CDT WED AUG 12 2009 FORECAST IS BASED ON IGNITION TIME OF 1300 CDT ON AUGUST 12. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... HOT AND SUNNY WEATHER WILL CONTINUE TODAY WITH LIGHT SOUTHWESTERLY WINDS AHEAD OF AN APPROACHING FRONTAL BOUNDARY. WIND GUSTS OF UP TO 15 MPH ARE ANTICIPATED...BUT IT WOULD NOT BE A SURPRISE IF THERE IS A STRAY GUST TO 20 MPH DUE TO THE DECENT MIXING POTENTIAL. DRY CONDITIONS ARE ANTICIPATED WITH AN AFTERNOON MINIMUM RH VALUE NEAR 30 PERCENT. HOWEVER...IF MIXING IS LESS THAN EXPECTED...THE MINIMUM RH COULD BE 5 OR 10 PERCENT HIGHER. SMOKE DISPERSION SHOULD BE GOOD TO EXCELLENT FROM BURN TIME THROUGH ABOUT 4 PM...BUT QUICKLY DETERIORATE BY LATE AFTERNOON. THERE IS POTENTIAL FOR LARGE FIRE GROWTH TODAY SINCE THE HAINES INDEX WILL BE 6. THE FRONTAL BOUNDARY MAY STALL JUST NORTH OR NEAR THE BURN SITE SOMETIME AROUND 7 TO 9 PM...SO THINK WINDS WILL REMAIN OUT OF THE SOUTHWEST MOST OF THE DAY. THURSDAY LOOKS LESS DRY...PARTLY DUE TO GREATER CLOUD COVER. THERE IS A CHANCE OF SHOWERS AND STORMS DURING THE EVENING AS THE BOUNDARY SETS UP ACROSS THE AREA. .TODAY... SKY/WEATHER.........SUNNY. MAX TEMPERATURE.....89-94. MIN HUMIDITY........27-32 PERCENT. WIND (20 FT)........SOUTH WINDS 6 TO 11 MPH. MIXING HEIGHT.......300-1400 FT AGL INCREASING TO 4000 FT AGL EARLY IN THE AFTERNOON...THEN INCREASING TO 6600 FT AGL EARLY IN THE AFTERNOON INCREASING TO 9200 FT AGL LATE IN THE AFTERNOON DECREASING TO 6200 FT AGL DECREASING TO 3200 FT AGL LATE IN THE AFTERNOON. MIXING WINDS........SOUTHWEST 9 TO 18 MPH. TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM 6PM SKY (%).........14 16 16 16 15 15 15 WEATHER COV..... WEATHER TYPE.... TEMP............82 85 88 89 91 91 90 RH..............47 42 40 35 33 33 35 20 FT WIND DIR..SW SW SW SW S S S 20 FT WIND SPD..10 10 10 9 9 8 7 20 FT WIND GUST.15 15 15 15 15 10 10 .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY. MIN TEMPERATURE.....61-66. MAX HUMIDITY........81-86 PERCENT. WIND (20 FT)........SOUTH WINDS 5 TO 10 MPH. MIXING HEIGHT.......300 FT AGL. MIXING WINDS........SOUTH 9 TO 12 MPH. TIME (CDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM SKY (%).........15 20 27 33 38 42 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE NONE NONE TEMP............89 81 73 70 67 64 RH..............36 45 58 68 73 80 20 FT WIND......S 7 S 7 S 8 S 9 S 8 S 7 20 FT WIND GUST.10 10 10 15 10 10 .THURSDAY... SKY/WEATHER.........PARTLY SUNNY. MAX TEMPERATURE.....87-92. MIN HUMIDITY........39-44 PERCENT. WIND (20 FT)........SOUTH WINDS 6 TO 11 MPH. MIXING HEIGHT.......300-600 FT AGL INCREASING TO 2300-3900 FT AGL LATE IN THE MORNING...THEN INCREASING TO 5500-7100 FT AGL EARLY IN THE AFTERNOON DECREASING TO 4800 FT AGL LATE IN THE AFTERNOON DECREASING TO 2500 FT AGL. MIXING WINDS........SOUTH 9 TO 17 MPH. TIME (CDT) 7 AM 10 AM 1 PM 4 PM SKY (%).........44 44 45 54 WEATHER COV..... WEATHER TYPE....NONE NONE NONE NONE TEMP............63 74 84 89 RH..............86 62 47 44 20 FT WIND......S 7G10 S 8G10 S 10G15 S 10G15 $$ FORECASTER...GROCHOCINSKI REQUESTED BY...DARRIN FRANCO TYPE OF REQUEST...PRESCRIBED .TAG 20090812.AGASS.01/FGF