FNUS76 KSGX 201347
FWSSGX

SPOT FORECAST FOR EAGLE FUEL BREAK...UNLISTED
NATIONAL WEATHER SERVICE SAN DIEGO CA
647 AM PDT FRI APR 20 2012

FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON APRIL 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...THERMAL BELT ACROSS THE BURN ELEVATIONS LAST NIGHT AND THIS MORNING...

...VERY WARM AND DRY TODAY AND SATURDAY...

.DISCUSSION...
HIGH PRESSURE BUILDING ALOFT OVER SOUTHERN CALIFORNIA THROUGH SATURDAY
THEN SLOWLY WEAKENING AND MOVING EAST SUNDAY THROUGH WEDNESDAY. THE
INCREASING SUBSIDENCE CREATED A THERMAL BELT ACROSS THE BURN SITE ELEVATIONS.
TEMPERATURES STAYED IN THE 70S LAST NIGHT. THIS MORNING THE BASE OF
THE INVERSION IS NEAR 1800 FEET MSL AND THE TOP NEAR 4000 FEET THIS
MORNING. TEMPERATURES OVER THE BURN SITE SHOULD CLIMB INTO THE 80S
QUICKLY THIS MORNING AND RELATIVE HUMIDITY DROP INTO THE TEENS. EXPECT
A WIND SHIFT IN THE EARLY TO MID AFTERNOON AS THE VALLEYS
HEAT UP AND A THERMAL TROUGH DEVELOPS. TONIGHT THE INVERSION SHOULD
JUST AS STRONG AND ABOUT 500 FEET LOWER...KEEPING THE BURN
ELEVATIONS IN THE THERMAL BELT AGAIN. FOR SATURDAY LOOK FOR
TEMPERATURES TO BE JUST AS WARM OR WARMER WITH VERY LOW HUMIDITY
AGAIN.

FOR SUNDAY...SLIGHTLY COOLER AND MOISTER.

MONDAY THROUGH WEDNESDAY...MUCH COOLER AND WETTER.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 85.
MIN HUMIDITY........13 PERCENT.
EYE LEVEL WINDS.....
   SLOPE............UPSLOPE/NORTHEAST 2 TO 4 MPH WITH GUSTS 10 MPH
                    SHIFTING TO DOWNSLOPE/SOUTHWEST IN THE MID TO
                    LATE AFTERNOON.

   RIDGETOP.........EAST 5 MPH WITH GUSTS 15 MPH IN THE MORNING.
                    SOUTHWEST 5 MPH WITH GUSTS 10 MPH IN THE AFTERNOON.

CHC WETTING RAIN....0 PERCENT.
MIXING HEIGHT.......5500 FT AGL.
MIXING WINDS........EAST 10 MPH.

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....AROUND 75.
MAX HUMIDITY........20 PERCENT.
EYE LEVEL WINDS.....DOWNSLOPE 1 TO 3 MPH.
   RIDGETOP.........NORTHEAST 2 TO 4 MPH.
CHC WETTING RAIN....0 PERCENT.
MIXING HEIGHT.......500 TO 2000 FT AGL.
MIXING WINDS........NORTH 2 MPH.

.SATURDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 86.
MIN HUMIDITY........15 PERCENT.
EYE LEVEL WINDS.....UPSLOPE/NORTHEAST 2 TO 4 MPH IN THE MORNING
                    DOWNSLOPE/SOUTHWEST 3 TO 5 MPH WITH GUSTS 10 MPH
                    IN THE AFTERNOON.

   RIDGETOP.........EAST 3 MPH WITH GUSTS 5 MPH IN THE MORNING...
                    SOUTH TO SOUTHWEST 4 MPH WITH GUSTS 10 MPH IN THE
                    AFTERNOON.

CHC WETTING RAIN....0 PERCENT.
MIXING HEIGHT.......500 FT AGL.
MIXING WINDS........SOUTH 5 MPH.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT AND SUNDAY...
CLEAR. LOWS AROUND 66. MAX RH 35 PERCENT. HIGHS AROUND 82.
MIN RH 20 PERCENT. EYE LEVEL WINDS LIGHT UPSLOPE BECOMING
SOUTHWEST IN THE AFTERNOON. RIDGETOP WINDS SOUTH TO SOUTHWEST 5 MPH
WITH GUSTS 10 MPH.

.SUNDAY NIGHT AND MONDAY...
COOLER AND WETTER. INCREASING CIRRUS CLOUDS. LOWS AROUND 61.
MAX RH 55 PERCENT. HIGHS AROUND 75. MIN RH 35 PERCENT.
EYE LEVEL WINDS LIGHT UPSLOPE IN THE MORNING BECOMING
SOUTHWEST 5 TO 10 MPH IN THE AFTERNOON.
RIDGETOP WINDS WEST TO SOUTHWEST 5 MPH WITH GUSTS 10 MPH.

.MONDAY NIGHT AND TUESDAY...
PARTLY CLOUDY. LOWS AROUND 58. MAX RH 80 PERCENT. HIGHS AROUND 62.
MIN RH 5 PERCENT. EYE LEVEL WINDS VARIABLE/SOUTHWEST 2 TO 5 MPH.
RIDGETOP WINDS SOUTH TO SOUTHEAST 5 MPH

$$
FORECASTER...ROB BALFOUR
REQUESTED BY...MICHAEL NOBLES
TYPE OF REQUEST...PRESCRIBED
.TAG 20120420.EAGLE.01/SGX