FNUS75 KGJT 231431
FWSGJT

SPOT FORECAST FOR YELLOW PINE...U.S. FOREST SERVICE
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
831 AM MDT THU APR 23 2009

FORECAST IS BASED ON IGNITION TIME OF 0805 MDT ON APRIL 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A NORTHWEST PACIFIC TROUGH COMES ONSHORE...AND
A WEAK LOW PRESSURE SYSTEM WORKS THROUGH THE FOUR CORNERS TODAY.
THIS WILL INCREASE SOUTHWEST GRADIENT WINDS THAT WILL OVERCOME
TERRAIN WINDS THIS AFTERNOON. A WEAK SURFACE-BASED INVERSION SETS UP
WITH SUNSET. FRIDAY...EXPECT STRONGER GRADIENT WINDS AS THE TROUGH
WORKS ACROSS THE GREAT BASIN. THE ASSOCIATED COLD FRONT WILL PASS
SATURDAY EVENING PRODUCING 2-4 INCHES OF NEW SNOW BY SUNDAY MORNING.


.TODAY (UNTIL SUNSET)...

SKY/WEATHER.........MOSTLY SUNNY (10-20%)...THEN BECOMING PARTLY
                    CLOUDY (30-40%) IN THE AFTERNOON. ISOLATED
                    VIRGA DEVELOPING IN THE AFTERNOON.
MAX TEMPERATURE.....60-65 F.
MIN HUMIDITY........17-22%.
20-FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 3-6 MPH UNTIL 1030...THEN
                    LIGHT AND VARIABLE FOR A TIME BEFORE BECOMING
                    SOUTHWEST AROUND NOON AND INCREASING TO 10-15
                    MPH WITH GUSTS TO AROUND 25 MPH. VIRGA MAY
                    PRODUCE STRONGER GUSTS LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....BECOMING EXCELLENT BY 1300.
MIXING HEIGHT.......11900 FT AGL.
TRANSPORT WINDS.....WEST 21 MPH...BECOMING SOUTHWEST LATE IN THE
                    AFTERNOON.

.TONIGHT (AFTER SUNSET)...

SKY/WEATHER.........PARTLY CLOUDY (30-40%).
SMOKE DISPERSAL.....POOR (16500 KNOT-FT).

.FRIDAY...

SKY/WEATHER.........PARTLY CLOUDY (30-40%).
20-FOOT WINDS.......BREEZY. SOUTHWEST WINDS 5-10 MPH UNTIL AROUND
                    1200...THEN INCREASING TO 20-25 MPH WITH GUSTS
                    TO AROUND 40 MPH.
SMOKE DISPERSAL.....BECOMING EXCELLENT BY 1200.
MIXING HEIGHT.......9800 FT AGL.
TRANSPORT WINDS.....WEST 35 MPH.

$$
FORECASTER...ELLEN HEFFERNAN
REQUESTED BY...JEREMY SPETTER
TYPE OF REQUEST...PRESCRIBED
.TAG 20090423.YELLO.01/GJT