FNUS74 KTSA 182209 FWSTSA FIRE WEATHER PLANNING FORECAST FOR GRIGGS WRP...USDA-NRCS NATIONAL WEATHER SERVICE TULSA OK 509 PM CDT WED MAR 18 2009 FORECAST IS BASED ON IGNITION TIME OF 1655 CDT ON MARCH 18. IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... A COLD FRONT WILL MOVE THROUGH THE FORECAST AREA THIS EVENING WITH CHANCES OF SHOWERS AND THUNDERSTORMS INCREASING BEHIND THE COLD FRONT. TEMPERATURES WILL BE MUCH COOLER ON THURSDAY IN THE WAKE OF THE FRONTA AS HIGH PRESSURE BUILDS INTO THE REGION. THE WINDS WILL BECOME SOUTHEASTERLY ON FRIDAY AS THE HIGH PRESSURE SYSTEM SHIFTS EAST OF THE AREA. .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING MOSTLY CLOUDY (55-65 PERCENT). SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. CHANCE OF SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT. MIN TEMPERATURE.....AROUND 47. MAX HUMIDITY........78 PERCENT. MIXING HEIGHT.......5700-7300 FT AGL DECREASING TO 0 FT AGL. TRANSPORT WINDS.....NORTHEAST 7 TO 15 MPH. WIND (20 FT)........SOUTHEAST WINDS AROUND 5 MPH SHIFTING TO THE NORTH 10 TO 14 MPH. .THURSDAY... SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). CHANCE OF SHOWERS AND THUNDERSTORMS IN THE MORNING. MAX TEMPERATURE.....AROUND 64. MIN HUMIDITY........35 PERCENT. MIXING HEIGHT.......0-1000 FT AGL INCREASING TO 4700-5400 FT AGL. TRANSPORT WINDS.....NORTHEAST 8 TO 16 MPH INCREASING TO EAST 20 TO 28 MPH IN THE LATE MORNING AND AFTERNOON. WIND (20 FT)........EAST WINDS 10 TO 15 MPH. GUSTS UP TO 25 MPH LATE IN THE MORNING. TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM TEMP............48 47 47 49 52 55 58 60 62 63 64 64 DEWPT...........41 41 40 40 39 39 39 38 37 37 36 36 RH..............76 78 77 70 61 54 48 44 40 38 36 35 20FT WIND DIR...NE NE NE NE NE NE NE E E E E E 20FT SPD (MPH)..7 6 7 8 9 10 10 11 10 10 9 8 20FT GUST(MPH)..15 15 15 15 15 25 25 25 25 25 25 25 CLOUDS (%)......71 65 60 54 48 42 37 31 28 26 23 20 WEATHER COV.....CHC CHC CHC CHC CHC CHC CHC WEATHER TYPE....RW RW RW RW RW RW RW MIXHGT/100(FT)..000 000 000 010 021 031 040 047 052 054 053 047 TR WIND DIR.....NE NE NE NE NE E E E E E E E TR WIND SPD(MPH)8 9 12 16 22 25 26 28 26 24 22 20 STABILITY.......E F F F D D D C C C C C 1700FT MIX T (F)53 53 53 53 52 55 58 60 62 63 64 64 VENT/1000(M 3/S)000 000 000 002 006 011 014 018 018 018 016 013 .FORECAST DAYS 3 THROUGH 5... .FRIDAY... MOSTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. SOUTHEAST WINDS AROUND 9 MPH. LOWEST RELATIVE HUMIDITY AROUND 30 PERCENT. HIGHEST RELATIVE HUMIDITY AROUND 75 PERCENT. .SATURDAY... WARMER. PARTLY CLOUDY. LOWS IN THE MID 40S. HIGHS IN THE MID 70S. SOUTH WINDS AROUND 12 MPH. .SUNDAY... MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE LOWER 70S. SOUTH WINDS AROUND 13 MPH. .MONDAY... MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE LOWER 70S. SOUTH WINDS AROUND 18 MPH. $$ FORECASTER...SONDAG REQUESTED BY...JAMES DIXON TYPE OF REQUEST...PRESCRIBED .TAG 20090318.GRIGG.01/TSA