FNUS76 KSGX 031120 FWSSGX SPOT FORECAST FOR TEST...UNLISTED NATIONAL WEATHER SERVICE SAN DIEGO CA 420 AM PDT TUE JUL 3 2012 FORECAST IS BASED ON IGNITION TIME OF 1550 PDT ON JULY 02. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... A TROUGH WILL MOVE FROM EAST TO WEST ACROSS THE SAN BERNARDINO MOUNTAINS THE AFTERNOON AND EVENING OF JULY 4TH. THIS WILL CAUSE THE GENERAL WINDS TO SHIFT FROM SOUTHWEST TO EAST AND BRING MONSOON MOISTURE ACROSS THE AREA. THE AIR MASS WILL BECOME UNSTABLE ENOUGH TO SUPPORT THUNDERSTORM DEVELOPMENT WEDNESDAY AFTERNOON AND EVENING. HOWEVER BELOW 12000 FT MSL THE AIR WILL REMAIN RELATIVELY DRY... SO LITTLE TO NO WETTING RAIN IS EXPECTED TO REACH THE GROUND AROUND BIG BEAR LAKE...AND THE MAIN IMPACT FROM THE THUNDERSTORMS WOULD BE INFREQUENT CLOUD TO GROUND LIGHTNING STRIKES AND GUSTY DOWN DRAFT WINDS WINDS. .TONIGHT/WEDNESDAY JULY 4TH... SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING. MIN TEMPERATURE.....AROUND 50. MAX HUMIDITY........55 PERCENT. WIND................ SLOPES...........SOUTHWEST 5 MPH BECOMING EAST LATE IN THE EVENING...THEN BECOMING DOWNSLOPE 1 TO 2 MPH EARLY THURSDAY MORNING. RIDGETOP.........EAST 5 TO 10 MPH IN THE EVENING DIMINISHING TO EAST 2 TO 5 MPH EARLY THURSDAY MORNING. MIXING HEIGHT.......5000 FT AGL...LOWERING TO 500 FT AGL AFTER 2100 PDT. MIXING WINDS........SOUTHEAST 5 TO 10 MPH. TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM SKY (%).........66 66 66 66 66 45 45 45 45 45 45 37 WEATHER COV.....SCH SCH SCH SCH SCH WEATHER TYPE....RW RW RW RW RW TEMP............68 66 63 59 57 55 54 52 51 50 50 50 RH..............40 44 49 54 56 57 55 54 52 53 53 53 20 FT WIND DIR..SW SW SW SW SW E E E E E E S 20 FT WIND SPD..4 4 4 4 4 4 4 4 4 4 4 0 20 FT WIND GUST.10 10 10 10 10 5 5 5 5 5 5 .THURSDAY... SKY/WEATHER.........PARTLY CLOUDY. MAX TEMPERATURE.....AROUND 72. MIN HUMIDITY........25 PERCENT. WIND................ SLOPES...........LIGHT WINDS BECOMING WEST 5 MPH LATE IN THE MORNING. RIDGETOP.........NORTH 5 MPH. MIXING HEIGHT.......500 FT AGL UNTIL 1000 PDT...THEN MIXING TO 7000 FT AGL. MIXING WINDS........NORTHWEST 5 MPH. TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%).........37 37 37 37 37 50 50 50 50 50 50 36 WEATHER COV..... WEATHER TYPE.... TEMP............50 55 62 66 69 70 71 71 72 72 71 70 RH..............53 45 35 30 28 27 28 29 29 30 32 34 20 FT WIND DIR..S S S S S W W W W W W W 20 FT WIND SPD..0 0 0 0 0 4 4 4 4 4 4 4 20 FT WIND GUST. 5 5 5 5 5 5 5 $$ FORECASTER...ROB BALFOUR REQUESTED BY...C FLORES TYPE OF REQUEST...PRESCRIBED .TAG 20120702.TEST_.01/SGX