FNUS76 KSGX 252056 FWSSGX SPOT FORECAST FOR CA-CNF-MESA...CNF MONT NATIONAL WEATHER SERVICE SAN DIEGO CA 156 PM PDT WED AUG 25 2010 FORECAST IS BASED ON REQUEST TIME OF 1340 PDT ON AUGUST 25. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...AIR MASS WILL REMAIN UNSTABLE ENOUGH TO SUPPORT MIXTURE OF DRY AND WET THUNDERSTORMS UNTIL 8 PM. MAIN WEATHER THREAT IN ADDITION TO LIGHTNING IS DOWNDRAFT WINDS TO 40 MPH FUNNELED DOWN THE SAN DIEGO RIVER AND OTHER ALIGNED DRAINAGES AND ACROSS MESA FIRE. FOR THURSDAY THE GENERAL WINDS WILL SHIFT FROM EAST TO WEST BY THE AFTERNOON. THIS SHOULD STEER ANY THUNDERSTORMS THAT MIGHT DEVELOP AWAY FROM THE MESA FIRE. FOR FRIDAY THE COMBINATION OF THE GENERAL WINDS FROM THE SOUTHWEST AND THE NORMAL UP VALLEY AFTERNOON AND EVENING WINDS COULD PRODUCE WIND GUSTS OVER 35 MPH. BY SATURDAY A SIGNIFICANT COOLING AND MOISTENING IS EXPECTED AS THE MARINE AIR SURGES INLAND ACROSS ELEVATIONS BELOW 2000 FEET. .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE EVENING. MIN TEMPERATURE.....AROUND 73. MAX HUMIDITY........40 PERCENT. WIND................ SLOPES...........NORTHEAST 5 MPH IN THE EVENING BECOMING LIGHT DOWNSLOPE. RIDGETOP.........EAST 5 TO 10 MPH. CHC WETTING RAIN....10 PERCENT IN THE EVENING...THEN 0 PERCENT. LAL.................2...BECOMING 1 LATE IN THE EVENING. MIXING HEIGHT.......12000 FT AGL...BECOMING 500 FT AGL EARLY IN THE EVENING. MIXING WINDS........EAST 5 MPH. TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM SKY (%).........37 37 37 37 37 25 25 25 25 25 25 25 WEATHER COV.....ISO ISO ISO ISO ISO WEATHER TYPE....RW RW RW RW RW TEMP............89 85 82 81 80 79 78 77 76 74 74 74 RH..............38 41 42 42 42 42 42 42 42 42 42 40 20 FT WIND DIR..NE NE W W W NW NW NW E E E S 20 FT WIND SPD..4 4 0 0 0 0 0 0 0 0 0 0 20 FT WIND GUST.10 10 EYE LVL WND DIR.NE NE W W W NW NW NW E E E S EYE LVL WND SPD.4 4 0 0 0 0 0 0 0 0 0 0 EYE LVL WND GST.10 10 .THURSDAY... SKY/WEATHER.........MOSTLY SUNNY...BECOMING PARTLY CLOUDY. MAX TEMPERATURE.....AROUND 99. MIN HUMIDITY........20 PERCENT. WIND................ SLOPES...........UPSLOPE 3 TO 5 MPH IN THE MORNING...BECOMING WEST TO SOUTHWEST 10 MPH IN THE AFTERNOON. RIDGETOP.........EAST 10 TO 15 MPH IN THE MORNING...BECOMING WEST IN THE AFTERNOON. CHC WETTING RAIN....5 PERCENT. LAL.................1. MIXING HEIGHT.......BECOMING 11000-12500 FT AGL LATE IN THE MORNING... LOWERING TO 3000 FT AGL LATE IN THE AFTERNOON. MIXING WINDS........EAST 5 MPH...BECOMING WEST 10 TO 15 MPH. TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%).........25 25 25 25 25 34 34 34 34 34 34 26 WEATHER COV..... WEATHER TYPE.... TEMP............76 80 84 89 94 98 98 98 98 97 92 88 RH..............37 34 30 27 23 21 22 22 22 22 26 30 20 FT WIND DIR..S S NE NE NE N N N W W W W 20 FT WIND SPD..0 0 0 0 0 4 4 4 4 4 4 8 20 FT WIND GUST. 5 5 5 5 5 5 10 EYE LVL WND DIR.S S NE NE NE N N N W W W W EYE LVL WND SPD.0 0 0 0 0 4 4 4 4 4 4 8 EYE LVL WND GST. 5 5 5 5 5 5 10 $$ FORECASTER...ROB BALFOUR REQUESTED BY...DISPATCHER TYPE OF REQUEST...WILDFIRE .TAG 20100825.CACNF.02/SGX