FNUS76 KSGX 181413 AAA
FWSSGX

SPOT FORECAST FOR ANNUAL WILDLAND FIRE DRILL - DAY 1...UPDATED
NATIONAL WEATHER SERVICE SAN DIEGO CA
713 AM PDT SAT APR 18 2009

FORECAST IS BASED ON IGNITION TIME OF 0900 PDT ON APRIL 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
STRONG HIGH PRESSURE BUILDING ALOFT WILL PRODUCE VERY WARM AND DRY
CONDITIONS TODAY WITH EAST WINDS GUSTING TO 20 MPH. EVEN WARMER AND
DRIER SUNDAY AND MONDAY WITH STRONGER EAST WINDS. TUESDAY...DAY 2
OF THE DRILL...WILL BE A TRANSITION DAY. LOOK FOR CONTINUED HOT
AND DRY WEATHER TUESDAY BUT WINDS SHIFTING TO A WESTERLY
DIRECTION AS HIGH PRESSURE RIDGE BEGINS TO BREAK DOWN. A COOLING
AND MOISTENING TREND IF FORECAST FOR WEDNESDAY AND THURSDAY WITH
INCREASING WEST WINDS AS A TROUGH APPROACHES FROM THE NORTHWEST.
THE MARINE LAYER MAY DEEPEN ENOUGH BY THURSDAY MORNING TO IMPACT
AIRPORTS BELOW 1500 FEET MSL.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....VALLEY FLOOR/2400 FT...........85.
                    AT 2900 FT.....................82
                    ATOP VIEJAS MOUNTAIN/4100 FT...75

MIN HUMIDITY........12 TO 15 PERCENT.

WIND................
   SLOPES...........EAST TO NORTHEAST 5 TO 10 MPH...WITH GUSTS
                    15 MPH DOWN ALIGNED VALLEYS.

   RIDGETOP.........NORTHEAST 15 TO 20 MPH...THEN BECOMING
                    NORTHEAST 10 MPH LATE IN THE AFTERNOON.

CHC WETTING RAIN....0 PERCENT.
LAL.................1.
MIXING HEIGHT.......5000-5500 FT AGL AFTER 1100 PDT.
MIXING WINDS........NORTHEAST 10 TO 15 MPH.


HOURLY FORECAST FOR VALLEY FLOOR/2400 FT MSL

TIME (PDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........1   1   1   1   1   1   1   1   1
WEATHER COV.....
WEATHER TYPE....
TEMP............60  72  81  83  85  85  84  84  81
RH..............25  17  13  12  11  11  12  12  14
20 FT WIND DIR..E   E   NE  NE  NE  E   E   E   NE
20 FT WIND SPD..4   4   4   4   4   4   4   4   4
20 FT WIND GUST.5   5   10  10  10  10  10  10  5

AIR OPERATIONS...
CEILING AND VISIBILITY UNLIMITED ALL AIRPORTS.
LIGHT TO MODERATE TURBULENCE BELOW FL100 OVER AND WEST
OF HIGHER MOUNTAINS.

WINDS ALOFT...DIRECTION/SPEED IN KNOTS
           8AM         11AM        2PM          5PM
FL100   025/19      020/20      030/20       045/17
FL090      035/18      025/18      035/19       040/17
FL080      040/18      040/17      040/18       040/16
FL070      050/18      055/18      050/12       040/13
FL060      050/20      065/20      075/16       055/13
FL050      060/16      075/18      080/16       065/12
FL040      070/13      075/17      080/16       065/12
FL030      075/07      075/13      080/11       035/05

$$
FORECASTER...ROB BALFOUR
REQUESTED BY...RON HUFF
TYPE OF REQUEST...PRESCRIBED
.TAG 20090418.ANNUA.01/SGX