FNUS75 KFGZ 191321 FWSFGZ SPOT FORECAST FOR WHEATFIELDS PILE BURN...NAVAJO REGION NATIONAL WEATHER SERVICE FLAGSTAFF AZ 621 AM MST FRI AUG 19 2011 FORECAST IS BASED ON IGNITION TIME OF 0900 MST ON AUGUST 19. IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A MOIST AND UNSTABLE AIRMASS WILL AFFECT THE FIRE SITE TODAY WITH SCATTERED SHOWERS AND THUNDERSTORMS ANTICIPATED. SOUTHWEST WINDS WILL DEVELOP BY LATE MORNING...WITH A FEW GUSTS OVER 10 MPH. .TODAY... SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE MORNING...THEN A CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....82 TO 84. MIN HUMIDITY........28 TO 31 PERCENT. WINDS (20 FT).......LIGHT AND VARIABLE WINDS BECOMING SOUTHWEST 4 TO 8 MPH WITH GUSTS TO 12 MPH BY 1100L. LAL.................3. HAINES INDEX........3 VERY LOW. MAX VENT RATE.......EXCELLENT (113700 KNOT-FT). CLEARING INDEX......1137. $$ FORECASTER...PETERSON REQUESTED BY...DARRYL WILSON REASON FOR REQUEST...PRESCRIBED .TAG 20110819.WHEAT.01/FGZ