402
FNUS76 KPQR 202242
FWSPQR

Spot Forecast for High Lava IAP...USFS GPF
National Weather Service Portland OR
342 PM PDT Thu Aug 20 2026

Forecast is based on forecast start time of 0700 PDT on August 21.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Northwest winds turn toward the southwest as a weak
system passes offshore on Friday. Stronger onshore flow will
bring cooler temperatures and higher humidity into the weekend.
20-30% chances for light rain showers and 15-20% chances for
isolated thunderstorms Friday afternoon into early Saturday
morning, with gusty and erratic winds possible near storms.

.FRIDAY...

Sky/weather.........Mostly cloudy. Patchy to areas of smoke.
CWR.................4 percent.
Chance of lightning.6 percent.
Max temperature.....Around 77.
Min humidity........47 percent.
Wind (20 ft)........
 Slope/valley.......Light winds.
 Ridgetop...........Light winds becoming west around 5 mph late
                    in the afternoon.
Mixing height.......1600 ft AGL.
Transport winds.....Light winds becoming southeast 3 to 6 mph in
                    the late morning, then shifting to the west
                    6 to 7 mph late in the afternoon.

TIME (PDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........91  72  85  73  83  95  94  92  96  97  96
Weather cov.....PTY PTY PTY             PTY PTY ARS ARS ARS
Weather type....SMK SMK SMK             SMK SMK SMK SMK SMK
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   10
Temp............64  62  65  66  68  72  74  76  75  76  74
RH..............54  58  56  57  54  51  49  47  49  53  56
20 FT wind dir..N   NW  NE  NW  SE  SE  S   S   SW  W   W
20 FT wind spd..3   4   3   2   2   3   3   4   4   4   4
20 FT wind gust.6   7   6   6   6   7   7   8   10  10  10
Ridge wind dir..N   NW  NE  E   SE  SE  S   S   SW  W   W
Ridge wind spd..4   4   3   3   3   4   4   5   5   6   6
Mix hgt (kft)...0.3 0.3 0.5 0.7 1.3 1.6 1.6 1.6 1.5 1.4 1.3
Transp wind dir.N   W   S   SE  SE  SE  S   S   SW  W   W
Transp wind spd.5   5   3   3   5   6   5   6   6   6   7

.FRIDAY NIGHT...

Sky/weather.........Mostly cloudy then becoming partly cloudy.
                    Patchy to areas of smoke. Chance of showers and
                    slight chance of thunderstorms in the evening
                    and overnight.
CWR.................5 percent.
Chance of lightning.20 percent.
Min temperature.....Around 50.
Max humidity........96 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming west 6 to 8 mph late in
                    the evening. Gusty and erratic winds expected
                    near thunderstorms.
 Ridgetop...........West winds around 5 mph increasing to 7 to 9
                    mph overnight. Gusty and erratic winds
                    expected near thunderstorms.
Mixing height.......200 ft AGL.
Transport winds.....West 6 to 7 mph increasing to 7 to 10 mph.

TIME (PDT)      6 PM      9 PM      MIDNGT    3 AM
Sky (%).........96        96        69        60
Weather cov.....AREAS     PATCHY    CHANCE    CHANCE
Weather type....SMOKE     SMOKE     RNSHWR    RNSHWR
Tstm cov........                    S CHC     S CHC
CWR.............0         0         0         0
Chc of ltng (%).10        10        20        20
Temp............73        67        68        64
RH..............60        69        67        73
20 FT wind......W 4G10    W 4G8     W 6G11    W 7G13
Ridgetop wind...W 5G11    W 6G12    W 7G13    SW 8G15
Mix hgt (ft)....900       400       400       400
Transport wind..W 7       NW 7      W 7       SW 9

.SATURDAY...

Sky/weather.........Partly cloudy then becoming mostly sunny.
                    Slight chance of rain showers in the morning.
CWR.................5 percent.
Chance of lightning.5 percent.
Max temperature.....Around 65.
Min humidity........61 percent.
Wind (20 ft)........
 Slope/valley.......West winds 6 to 8 mph. Gusts up to 20 mph late
                    in the afternoon.
 Ridgetop...........Southwest winds 8 to 10 mph becoming west around
                    10 mph in the afternoon. Gusts up to 22 mph in
                    the afternoon.
Mixing height.......4000 ft AGL.
Transport winds.....West 8 to 13 mph.

TIME (PDT)      6 AM         10 AM        2 PM
Sky (%).........57           44           29
Weather cov.....S CHC        S CHC
Weather type....RNSHWR       RNSHWR       NONE
Tstm cov........
CWR.............0            0            0
Chc of ltng (%).0            0            0
Temp............57           52           63
RH..............79           91           67
20 FT wind......W 8G14       SW 8G14      W 7G16
Ridgetop wind...SW 9G16      SW 8G16      W 10G18
Mix hgt (ft)....500          1600         3300
Transport wind..SW 10        W 10         W 12

$$
Forecaster...Picard
Requested by...Scott Koehler
Type of request...WILDFIRE
.TAG 2618852.32/PQR
.DELDT 08/20/26
.FormatterVersion 2.0.0
.EMAIL Scott_Koehler@firenet.gov