941
FNUS76 KPQR 060242
FWSPQR

Spot Forecast for Letsom Mtn. Fire...ODF
National Weather Service Portland OR
742 PM PDT Wed Jun 5 2024

Forecast is based on forecast start time of 2000 PDT on June 05.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...High pressure will remain over the region through
Friday. Thermal trough will remain along the south Oregon coast,
bending back towards the Cascades across western Douglas and into
central Lane Counties, generally to the south of the burn area.
As such, will not see all that much offshore flow, so not expecting
any extreme wildfire weather such as very low humidity of hot
temperatures. Onshore flow will pick up Friday night, as cooler and
more moist marine air spreads inland from the coast.


.THURSDAY (6 JUNE)...
Sky/weather.........Sunny.
CWR.................0 percent.
LAL.................1.
Max temperature.....near 80.
Min humidity........35 to 40 percent.
Wind (20 ft)........
 Slope/valley.......Variable 0-2 mph, then north 2-5 mph by 1200.
 Ridgetop...........North to northeast 2-4 mph early, then north
                      4-8 mph. Few gusts to 18 mph after 1400.
Mixing height.......rising to 5000 ft AGL.
Transport winds.....North 15 mph.
Haines Index........5 (moderate).
Haines Index (Mid)..5 (moderate).


.THURSDAY NIGHT...
Sky/weather.........Clear.
CWR.................0 percent.
LAL.................1.
Min temperature.....50 to 55.
Max humidity........75 to 85 percent, lowest on ridgetops.
Wind (20 ft)........
 Slope/valley.......North 2-5 mph early, then light drainage.
 Ridgetop...........North to northwest 5-8 mph with gusts to 18 mph
                    early, then wind gradually easing to 1-4 mph.
Mixing height.......lowering to 500 ft AGL.
Transport winds.....North 10 to 15 mph.
Haines Index........5 (moderate).
Haines Index (Mid)..4 (low).


.FRIDAY (7 JUNE)...
Sky/weather.........Mostly sunny.
CWR.................0 percent.
LAL.................1.
Max temperature.....80 to 83.
Min humidity........35 to 40 percent.
Wind (20 ft)........
 Slope/valley.......Variable 0-2 mph, becoming northwest 2-4 mph
                      later in the morning.
 Ridgetop...........North to northeast 2-4 mph early, then north
                      to northwest 4-8 mph. Few gusts to 18 mph.
Mixing height.......5000 ft AGL.
Transport winds.....North 10 to 15 mph.
Haines Index........5 (moderate).
Haines Index (Mid)..4 (low).


$$
Forecaster...Rockey
Requested by...Chet Behling
Type of request...WILDFIRE
.TAG 2415679.0/PQR
.DELDT 06/05/24
.FormatterVersion 2.0.0
.EMAIL chet.behling@odf.oregon.gov