FNUS75 KVEF 171348 FWSVEF SPOT FORECAST FOR MIDDLE FORK RX...CCIFC NATIONAL WEATHER SERVICE LAS VEGAS NV 648 AM PDT THU SEP 17 2009 FORECAST IS BASED ON IGNITION TIME OF 0655 ON SEPTEMBER 17. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A LOW PRESSURE SYSTEM WILL MOVG TO EASTERN ARIZONA TODAY KEEPING THUNDERSTORMS JUST EAST OF THE AREA BUT SOME CUMULUS DEVELOPMENT IS EXPECTED. A PERSISTENT EASTERLY FLOW IN ARIZONA WILL PULL ADDITIONAL MOISTURE BACK INTO THE AREA FRIDAY LEADING TO A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS. .TODAY... SKY/WEATHER.........SUNNY IN THE MORNING. PARTLY CLOUDY IN THE AFTERNOON. MAX TEMPERATURE.....69-74. MIN HUMIDITY........19-24 PERCENT. 20 FT-10 MIN AVG..EAST WINDS 5 TO 10 MPH. 10K FT WIND.......EAST 13 TO 20 MPH. CWR (>= 0.10 IN)....0 PERCENT. LAL.................1. MIXING HEIGHT.......10000 FT AGL. TRANSPORT WINDS.....NORTHEAST 6 TO 12 KNOTS. .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY. MIN TEMPERATURE.....51-56. MAX HUMIDITY........57-63 PERCENT. 20 FT-10 MIN AVG..EAST WINDS 2 TO 5 MPH. 10K FT WIND.......EAST 6 TO 11 MPH. CWR (>= 0.10 IN)....0 PERCENT. LAL.................1. MIXING HEIGHT.......6500 FT AGL. TRANSPORT WINDS.....EAST 6 TO 10 KNOTS. .FRIDAY... SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE LATE MORNING AND AFTERNOON. MAX TEMPERATURE.....67-72. MIN HUMIDITY........25-30 PERCENT. 20 FT-10 MIN AVG..EAST WINDS 5 TO 10 MPH. 10K FT WIND.......NORTHEAST 6 TO 11 MPH. CWR (>= 0.10 IN)....5 PERCENT. LAL.................2. MIXING HEIGHT.......11500 FT AGL. TRANSPORT WINDS.....EAST 6 TO 12 KNOTS. $$ FORECASTER...HARRISON REQUESTED BY...WILLIAMS TYPE OF REQUEST...PRESCRIBED .TAG 20090917.MIDDL.01/VEF