527
FNUS76 KPQR 042340
FWSPQR

Spot Forecast for Letsom Mtn. Fire...ODF
National Weather Service Portland OR
440 PM PDT Tue Jun 4 2024

Forecast is based on forecast start time of 0000 PDT on June 05.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...High pressure will build offshore, while thermal
trough sits over far southwest Oregon into northwest California.
This will more typical early June weather, with uptick of
northwest winds in the afternoon. That thermal trough will build
up the coast Wednesday night into Thursday, bringing east to
northeast winds along with warmer and drier conditions.


.WEDNESDAY (5 JUNE)...
Sky/weather.........Partly cloudy in the morning, then sunny.
                    Patchy valley fog early.
CWR.................0 percent.
LAL.................1.
Max temperature.....72 to 75.
Min humidity........45-50 percent.
Wind (20 ft)........
 Slope/valley.......Variable 0-2 mph, becoming northwest 2-5 mph
                      by early afternoon.
 Ridgetop...........West 2-5 mph, becoming northwest 4-7 mph
                      around 1300.
Mixing height.......rising to 4500 ft AGL.
Transport winds.....North to northwest 10 mph.
Haines Index........2 (very low).
Haines Index (Mid)..4 (low).


.WEDNESDAY NIGHT...
Sky/weather.........Clear. Patchy valley fog late.
CWR.................0 percent.
LAL.................1.
Min temperature.....45 to 50.
Max humidity........85-95 percent, lowest on ridges.
Wind (20 ft)........
 Slope/valley.......Northwest 3-5 mph until 2100, then drainage.
 Ridgetop...........Northwest 4-8 mph until 2100, then easing
                      to 2-5 mph. Winds will becoming
                      north to northeast late.
Mixing height.......lowering to 600 ft AGL.
Transport winds.....North around 10 mph.
Haines Index........4 (low).
Haines Index (Mid)..4 (low).


.THURSDAY (6 JUNE)...
Sky/weather.........Sunny. Patchy valley fog early.
CWR.................0 percent.
LAL.................1.
Max temperature.....78 to 82.
Min humidity........around 35 percent.
Wind (20 ft)........
 Slope/valley.......Variable 0-2 mph early, then becoming north
                      to northwest 3-5 mph by early afternoon.
 Ridgetop...........North to northeast 2-6 mph, becoming north
                      to northwest 4-8 mph by 1200.
Mixing height.......5000 ft AGL.
Transport winds.....North to northwest 10-15 mph.
Haines Index........4 (low).
Haines Index (Mid)..5 (moderate).


.FRIDAY (7 JUNE)...
Sky/weather.........Sunny.
CWR.................0 percent.
LAL.................1.
Max temperature.....80 to 85.
Min humidity........30-35 percent.
Wind (20 ft)........
 Slope/valley.......Variable 0-2 mph early, then becoming north
                      to northwest 2-4 mph by early afternoon.
 Ridgetop...........North to northeast 2-4 mph, becoming north,
                      to northwest 3-8 mph by 1200.
Mixing height.......5000 ft AGL.
Transport winds.....North to northwest 10-15 mph.
Haines Index........5 (moderate).
Haines Index (Mid)..5 (moderate).


$$
Forecaster...Rockey
Requested by...Oregon Department of Forestry - Chet Behling
Type of request...WILDFIRE
.TAG 2415619.0/PQR
.DELDT 06/04/24
.FormatterVersion 2.0.0
.EMAIL chet.behling@odf.oregon.gov