837
FNUS76 KOTX 182358
FWSOTX

Spot Forecast for Pioneer...NPS
National Weather Service Spokane WA
458 PM PDT Wed Sep 18 2024

Forecast is based on forecast start time of 0700 PDT on September 19.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Dry weather is forecast through Saturday. A weather system passing
into British Columbia will bring enhanced northwest winds to the
Pioneer Fire Thursday and Thursday Night with wind gusts as high as
35 MPH out of the northwest. Winds will remain breezy on Friday
with gusts up to 25 MPH with lighter winds on Saturday.  On Sunday
a weather system will bring a chance of rain, with the chance of
wetting rain still at 30 percent mainly for portions of the fire
closer to the Cascade crest.

.THURSDAY...

Sky/weather.........Sunny.
CWR.................0 percent.
LAL.................1.
Max temperature.....1100 ft elevation: 78 near the lake.
                    6000 ft elevation: 55 near ridge top.
Min humidity........1100 ft elevation: 27 percent.
                    6000 ft elevation: 44 percent.
Wind (20 ft)........Northwest 3 to 7 mph in the morning
                    increasing to 7 to 14 mph with gusts up to 30
                    mph in the afternoon. Strongest winds on ridge
                    tops and along Lake Chelan. For steep south to
                    north drainages winds locally downslope/downvalley
                    4 to 8 mph then upslope/upvalley by 1100.
Mixing height.......Near the surface through 0900 PDT increasing to
                    3500 ft AGL in the afternoon.
Transport winds.....Northwest 5 to 10 mph in the morning increasing to
                    15 to 20 mph in the afternoon.
Haines Index........4 Low.

.THURSDAY NIGHT...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
LAL.................1.
Min temperature.....1100 ft elevation: 54 near the lake.
                    6000 ft elevation: 38 near ridge top.
Max humidity........60-80 percent, highest recoveries ridge tops.
Wind (20 ft)........Northwest 7 to 15 mph with gusts up to 35 MPH.
                    Strongest winds on ridge tops and along Lake
                    Chelan.
Mixing height.......Near the surface.
Transport winds.....Northwest 10 to 20 mph.
Haines Index........4 Low.

.FRIDAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
LAL.................1.
Max temperature.....1100 ft elevation: 72 near the lake.
                    6000 ft elevation: 49 near ridge top.
Min humidity........1100 ft elevation: 30 percent.
                    6000 ft elevation: 50 percent.
Wind (20 ft)........Northwest winds 6 to 15 mph with gusts up to
                    25 mph. Strongest winds on ridge tops and
                    along Lake Chelan. For steep south to north
                    drainages winds locally downslope/downvalley
                    5 to 10 mph in the morning then upslope/upvalley
                    4 to 8 mph.
Mixing height.......Near surface through 0800 PDT increasing to
                    3000 ft AGL in the afternoon.
Transport winds.....Northwest 10 to 15 mph.
Haines Index........4 Low.

.FRIDAY NIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
LAL.................1.
Min temperature.....1100 ft elevation: 47 near the lake.
                    6000 ft elevation: 33 near ridge top.
Max humidity........60-77 percent, highest recoveries ridge tops.
Wind (20 ft)........Downslope/downvalley 4 to 9 mph.
Mixing height.......Near the surface.
Transport winds.....Downslope/downvalley 5 to 10 mph.
Haines Index........4 Low.

$$
Forecaster...JW
Requested by...Anna Valentine
Type of request...WILDFIRE
.TAG 2422366.6/OTX
.DELDT 09/18/24
.FormatterVersion 2.0.0
.EMAIL geoff_hibbs@nps.gov.,anna_valentine@nps.gov