FNUS76 KSGX 162123
FWSSGX

SPOT FORECAST FOR S390 FIELD EXERCISE 6 - TYPICAL MID SUMMER DAY...CNTY ORNG
NATIONAL WEATHER SERVICE SAN DIEGO CA
123 PM PST WED FEB 16 2011

FORECAST IS BASED ON A HYPOTHETICAL WEATHER SCENARIO. IT DOES NOT
REPRESENT ACTUAL CONDITIONS. IT IS ONLY TO BE USED FOR THE S390
FIELD EXERCISE BEING HOSTED BY ORANGE COUNTY FIRE AUTHORITY.

CONTACT DONAL BOURSIER FC ORC FS15-8 FOR FURTHER INFORMATION.

.DISCUSSION...TEST...TEST...TEST...
BROAD HIGH PRESSURE RIDGE CENTERED OVER ARIZONA WITH THERMAL
TROUGH OVER SOUTHEAST CALIFORNIA DESERTS. LOOK FOR MARINE AIR TO
PUSH UP CANYON EACH AFTERNOON THEN RETREAT DURING THE NIGHT.
LOWEST RELATIVE HUMIDITY WILL OCCUR DURING THE MID MORNING HOURS
AND HIGHEST RELATIVE HUMIDITY IN THE EARLY EVENING HOURS.
GENERAL WINDS ARE SOUTHWEST 10 MPH...AND WILL ADD TO THE SEA
BREEZE PUSH IN THE AFTERNOONS...BUT NOT BE STRONG ENOUGH TO
OPPOSE THE DOWN CANYON/DOWN SLOPE RETURN FLOW AT NIGHT.

.TODAY FOR S390 FIELD EXERCISE...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........15 PERCENT IN THE MORNING...INCREASING TO
                    35 PERCENT IN THE AFTERNOON.
WIND................
   SLOPES...........UPSLOPE 3 TO 8 MPH IN THE MORNING...
                    BECOMING WEST 10 TO 15 MPH DURING THE
                    AFTERNOON WITH GUSTS 25 MPH UP CANYON.
   RIDGETOP.........SOUTHWEST 10 MPH WITH GUSTS 20 MPH IN THE AFTERNOON.
MIXING HEIGHT.......8500 FT AGL.
MIXING WINDS........SOUTHWEST 5 TO 10 MPH.

.TONIGHT FOR S390 FIELD EXERCISE...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....LOW 57.
MAX HUMIDITY........85 PERCENT DURING THE EVENING...LOWERING
                    OVERNIGHT TO 35 PERCENT.
WIND................
   SLOPES...........WEST 10 MPH WITH GUSTS 25 MPH UNTIL 1900 PST...
                    THEN DOWNSLOPE/DOWN CANYON 3 TO 6 MPH.
   RIDGETOP.........SOUTHWEST 10 MPH WITH GUSTS 20 MPH IN THE EVENING.
MIXING HEIGHT.......LOWERING TO 1500 FT AGL AFTER 1900 PST.
MIXING WINDS........SOUTHWEST 10 MPH DURING THE EVENING...THEN
                    NORTHEAST LESS THAN 5 MPH OVERNIGHT.

.TOMORROW FOR S390 FIELD EXERCISE...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........15 PERCENT IN THE MORNING...INCREASING TO
                    35 PERCENT IN THE AFTERNOON.
WIND................
   SLOPES...........UPSLOPE 3 TO 8 MPH IN THE MORNING...
                    BECOMING WEST 10 TO 15 MPH DURING THE
                    AFTERNOON WITH GUSTS 25 MPH UP CANYON.
   RIDGETOP.........NORTHEAST LESS THAN 5 MPH IN THE MORNING...BECOMING
                    SOUTHWEST 10 MPH WITH GUSTS 20 MPH IN THE AFTERNOON.
MIXING HEIGHT.......8500 FT AGL.
MIXING WINDS........SOUTHWEST 5 TO 10 MPH.

TEST...TEST...TEST

$$
FORECASTER...ROB BALFOUR
REQUESTED BY...DONAL BOURSEIR
TYPE OF REQUEST...TEST
.TAG 20110218.S390F.06/SGX