FNUS75 KGJT 220453
FWSGJT

SPOT FORECAST FOR MAILBOX RX...BLM
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
1053 PM MDT TUE APR 21 2009

FORECAST IS BASED ON IGNITION TIME OF 0930 MDT ON APRIL 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...HIGH PRESSURE OVER THE GREAT BASIN WEAKENS TODAY. A
WEAK DISTURBANCE WILL PASS THIS AFTERNOON BRINGING SLIGHTLY
INCREASED INSTABILITY. WELL ABOVE NORMAL TEMPERATURES WILL CONTINUE
TODAY AND THURSDAY...ADDING TO THE POTENTIAL FOR AN ISOLATED
AFTERNOON BUILDUP OVER THE HIGHER TERRAIN. GUSTY OUTFLOW WINDS ARE A
THREAT BOTH AFTERNOONS. GRADIENT SOUTHWEST WINDS INCREASE ON THURSDAY
AS A TROUGH OF LOW PRESSURE STRENGTHENS OVER THE PACIFIC NORTHWEST.

.TODAY (THROUGH SUNSET)...

SKY/WEATHER.........MOSTLY SUNNY (10-20%). PARTLY SUNNY (30-40%)
    AFTER 1300.
MAX TEMPERATURE.....73-78 F.
MIN HUMIDITY........11-16%.
20-FOOT WINDS.......SOUTHEAST 2 TO 4 MPH SHIFTING TO THE WEST
    AND INCREASING TO 10 TO 15 MPH WITH GUSTS
    TO 25 MPH BY 1200.
SMOKE DISPERSAL.....EXCELLENT BY 1100.
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......RISING TO 15000 FT AGL BY 1400.
TRANSPORT WINDS.....DOWNSLOPE 5 MPH THROUGH 0900...THEN BECOMING
    WEST 15 MPH BY 1100.

.TONIGHT (AFTER SUNSET)...

SKY/WEATHER.........PARTLY CLOUDY (30-40%).
MIN TEMPERATURE.....38-43 F.
MAX HUMIDITY........45-50%.
20-FOOT WINDS.......NORTH WINDS 5 MPH SHIFTING TO THE EAST AFTER
                    MIDNIGHT.
SMOKE DISPERSAL.....POOR (3000-5200 KNOT-FT).
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......1000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 5 MPH.

.THURSDAY...

SKY/WEATHER.........PARTLY CLOUDY (30-40%).
MAX TEMPERATURE.....73-78 F.
MIN HUMIDITY........10-15%.
20-FOOT WINDS.......SOUTHEAST WINDS 5 MPH THROUGH 0900...THEN
    INCREASING AND SHIFTING TO THE SOUTHWEST
                    AT 13 TO 18 MPH WITH GUSTS TO AROUND 30 MPH
            IN THE AFTERNOON AFTER 1200.
SMOKE DISPERSAL.....BECOMING EXCELLENT BY 1300.
HAINES INDEX........5 MODERATE.
MIXING HEIGHT.......RISING TO 16500 FT AGL BY 1300.
TRANSPORT WINDS.....SOUTHEAST 5 MPH THROUGH 0900...THEN BECOMING
    SOUTHWEST 18 MPH BY 1200.

$$

FORECASTER...NORV LARSON
REQUESTED BY...ERIC BRANTINGHAM
TYPE OF REQUEST...PRESCRIBED
.TAG 20090422.MAILB.01/GJT