FNUS76 KOTX 132332
FWSOTX

SPOT FORECAST FOR YAKIMA COMPLEX SOUTH...WAIIMT#1
NATIONAL WEATHER SERVICE SPOKANE WA
432 PM PDT THU SEP 13 2012

FORECAST IS BASED ON REQUEST TIME OF 1625 MDT ON SEPTEMBER 13.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

...CONTINUED DRY AND UNSTABLE TONIGHT AND FRIDAY...

HIGH PRESSURE BUILDING OVER THE FIRE WILL ALLOW FOR A DRYING
AND WARMING TREND PEAKING FRIDAY. A WEAK DISTURBANCE PASSING LATE
IN THE DAY FRIDAY WILL BRING A WIND SHIFT AND INCREASE WEST AND
NORTHWEST WINDS OVER THE FIRE. THIS SYSTEM IS EXPECTED TO BRING
BETTER MIXING AND SHOULD SCOUR OUT THE SMOKE ACROSS THE AREA LATE
IN THE DAY. THE WESTERLY WINDS WILL CONTINUE TO BE BREEZY
THROUGH FRIDAY NIGHT WITH GUSTS UP TO 20 MPH POSSIBLY. THIS SYSTEM
WILL ALSO USHER IN HIGHER DEW POINTS THAT WILL RESULT IN BETTER
NIGHTTIME RELATIVE HUMIDITY RECOVERIES. COOLER WEATHER IS EXPECTED
TO CONTINUE OVER THE WEEKEND WITH ANOTHER WEAK COLD FRONT PASSAGE
IN THE AFTERNOON ON SATURDAY THAT WILL RESULT IN MORE BREEZY
WESTERLY WINDS. HIGH PRESSURE WILL THEN BUILD BACK IN EARLY NEXT
WEEK WITH ANOTHER WARMING AND DRYING TREND EXPECTED.

.FRIDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....83 IN BASINS AND 71 ON RIDGES.
MIN HUMIDITY........18 PERCENT IN BASINS AND 25 PERCENT ON RIDGES.
WIND (20 FT)........DOWNSLOPE/DOWNVALLEY 1 TO 3 MPH IN THE MORNING
                    ...BECOMING UPSLOPE 2 TO 4 MPH AFTER 1100AM.
                    AFTER 200 PM...WINDS WILL SHIFT OUT OF THE WEST
                    AND INCREASE TO 5 TO 8 MPH WITH GUSTS UP TO
                    16 MPH.
MIXING HEIGHT.......INVERSION BREAKING AROUND 1000 OR 1100 AM...
                    INCREASING TO 6000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 2 TO 4 MPH...INCREASING TO 8 TO 12 MPH
                    AFTER 200 PM.
LAL.................1.
HAINES INDEX........4 LOW.

.FRIDAY NIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....42 IN BASINS AND 52 ON RIDGES.
MAX HUMIDITY........78 PERCENT IN BASINS AND 68 PERCENT ON RIDGES.
WIND (20 FT)........WEST 6 TO 10 MPH WITH GUSTS UP TO 20 MPH.
MIXING HEIGHT.......NEAR SURFACE.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
LAL.................1.
HAINES INDEX........4 LOW.

.OUTLOOK...

.SATURDAY...MOSTLY CLEAR. LOWS 45 TO 55. HIGHS 76 TO 85 VALLEYS
63 TO 73 MOUNTAINS. NORTHWEST WIND 4 TO 8 MPH.
.SUNDAY...MOSTLY CLEAR. LOWS 43 TO 52. HIGHS 76 TO 85 VALLEYS...
66 TO 76 MOUNTAINS. NORTHWEST WIND 3 TO 7 MPH.
.MONDAY THROUGH TUESDAY...CLEAR. AREAS OF SMOKE. LOWS 43 TO 53.
HIGHS 79 TO 89 VALLEYS...68 TO 78 MOUNTAINS. WEST WIND 3 TO
7 MPH.
.WEDNESDAY...CLEAR. LOWS 45 TO 53. HIGHS 79 TO 87 VALLEYS...68 TO
78 MOUNTAINS.
.THURSDAY...MOSTLY CLEAR. LOWS 44 TO 53. HIGHS 79 TO 87 VALLEYS...
67 TO 77 MOUNTAINS.

$$
FORECASTER...SVH
REQUESTED BY...JOE BLAZEK
TYPE OF REQUEST...WILDFIRE
.TAG 20120913.YAKIM.02/OTX