FNUS76 KSGX 121332 AAA FWSSGX SPOT FORECAST FOR 2012 SD COUNTY WILDLAND FIRE DRILL - SATURDAY...UPDATED NATIONAL WEATHER SERVICE SAN DIEGO CA 632 AM PDT SAT MAY 12 2012 FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON MAY 12. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... STRONG INVERSION NEAR 1900 FEET MSL...MARINE LAYER IMPACTING LOWER ELEVATIONS OF INCIDENT/DRILL WHILE UPPER SLOPES AND RIDGES ARE IN MUCH DRIER AIR. FOG THIS MORNING AT LOWER ELEVATIONS/BASE CAMP SHOULD LIFT/BREAK UP AROUND 0730 PDT...WITH LOW CLOUDS CLEARING BY 0800 PDT. SOME HIGH CIRRUS CLOUDS WILL BE PRESENT THROUGH MOST OF THE DAY DUE TO AN UPPER LEVEL TROUGH MOVING BY TO THE DISTANT NORTH. ABOVE THE INVERSION...LIFTING FROM 1900 FEET THIS MORNING TO 2300 FEET THIS AFTERNOON...THE GENERAL WINDS ARE FROM THE EAST/SOUTHEAST. THESE ARE OPPOSED TO THE PREVAILING UP SLOPE/VALLEY WIND DIRECTION AND ARE FAVORABLE CONDITIONS FOR DUST DEVILS...OR IF A FIRE WAS PRESENT...FIRE WHIRLS...WITH UP HILL RUNS OR IN JACKPOTS OF FUEL ESPECIALLY DURING THE LATE MORNING THROUGH AFTERNOON HOURS. .TODAY...SATURDAY MAY 12 SKY/WEATHER.........MOSTLY SUNNY. PATCHY FOG IN THE EARLY MORNING. MAX TEMPERATURE.....AROUND 75. MIN HUMIDITY........40 PERCENT. WIND................ SLOPES...........UPSLOPE/SOUTHWEST 1 TO 3 MPH THROUGH MID MORNING BECOMING WEST 5 TO 10 MPH LATE MORNING THROUGH AFTERNOON. RIDGETOP.........EAST TO SOUTHEAST 5 TO 10 MPH. CHC WETTING RAIN....0 PERCENT. LAL.................1. MIXING HEIGHT.......500-2000 FT AGL. MIXING WINDS........WEST 5 MPH. TIME (PDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%).........20 8 8 8 8 8 8 8 19 WEATHER COV..... WEATHER TYPE.... TEMP............59 63 67 70 73 75 74 75 73 RH..............69 60 52 47 44 42 43 43 45 20 FT WIND DIR..NW NW W W W W W W W 20 FT WIND SPD..0 0 4 4 4 4 4 4 4 20 FT WIND GUST. 5 5 5 10 10 10 10 $$ FORECASTER...ROB BALFOUR REQUESTED BY...STEVE BUTCHER TYPE OF REQUEST...PRESCRIBED .TAG 20120512.2012S.01/SGX