Spot Forecast
Issued by NWS Portland, OR

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Spot Forecast for High Lava...USFS
National Weather Service Portland OR
602 AM PDT Fri Sep 11 2026

Forecast is based on forecast start time of 0700 PDT on September 11.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Winds from the west to northwest through Saturday.
There is a 20-40% chance of gusts up to 18 mph until 0900 today.
Daytime and overnight RH values improve through the weekend. Rain
returns Saturday with a 15-20% chance of thunderstorms in the
afternoon. Gusty and erratic winds expected near thunderstorms.

.REST OF TODAY...

Sky/weather.........Partly sunny then becoming partly cloudy.
CWR.................2 percent.
Chance of lightning.0 percent.
Max temperature.....Around 57.
Min humidity........58 percent.
Wind (20 ft)........
 Slope/valley.......Northwest winds 6 to 8 mph early in the morning
                    becoming light late in the evening.
 Ridgetop...........Northwest winds 10 to 15 mph early in the
                    morning becoming 7 to 9 mph. Gusts up to 16 mph
                    before 0900.
Mixing height.......2600 ft AGL.
Transport winds.....West 7 to 8 mph.

TIME (PDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........80  78  79  82  51  31  41  43  43  42  38
Weather cov.....
Weather type....
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   0
Temp............43  41  41  43  46  49  54  56  56  57  55
RH..............99  100 98  92  84  77  67  60  58  55  57
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..8   7   6   5   4   4   4   4   4   4   4
20 FT wind gust.14  12  11  9   8   8   8   8   8   8   8
Ridge wind dir..NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW
Ridge wind spd..15  14  13  10  9   8   8   8   8   8   7
Mix hgt (kft)...0.6 1.0 1.2 1.4 1.9 2.1 2.4 2.6 2.6 2.5 2.3
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.8   8   8   8   8   8   8   8   7   7   7

.TONIGHT...

Sky/weather.........Mostly cloudy.
CWR.................6 percent.
Chance of lightning.0 percent.
Min temperature.....Around 43.
Max humidity........84 percent.
Wind (20 ft)........
 Slope/valley.......Light winds.
 Ridgetop...........Northwest winds 7 to 9 mph becoming west.
Mixing height.......200 ft AGL.
Transport winds.....West 3 to 7 mph.

TIME (PDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........66  74  88  77  94  91  92  90  85  86  88  93
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   10
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............55  54  49  48  48  49  50  49  50  49  48  48
RH..............57  62  74  77  78  75  76  75  75  73  74  72
20 FT wind dir..W   W   NW  NW  NW  NW  NW  NW  NW  NW  W   W
20 FT wind spd..4   3   2   2   2   2   2   2   3   3   3   3
20 FT wind gust.7   6   6   5   5   6   6   6   6   6   6   6
Ridge wind dir..W   W   NW  NW  NW  NW  NW  NW  NW  NW  W   W
Ridge wind spd..9   8   7   6   5   6   6   6   6   6   6   6
Mix hgt (kft)...1.8 0.7 0.4 0.3 0.3 0.2 0.3 0.3 0.2 0.3 0.2 0.2
Transp wind dir.W   W   W   NW  NW  NW  NW  NW  NW  W   SW  SW
Transp wind spd.7   7   6   6   5   5   3   3   5   3   5   5

.SATURDAY...

Sky/weather.........Mostly cloudy. Rain showers and slight chance
                    of thunderstorms in the afternoon.
CWR.................6 percent increasing to 84 percent late in the
                    afternoon.
Chance of lightning.15 percent.
Max temperature.....Around 55.
Min humidity........73 percent.
Wind (20 ft)........
 Slope/valley.......Light winds becoming west around 7 to 9 mph
                    late in the afternoon. Gusty and erratic winds
                    expected near thunderstorms late in the
                    afternoon.
 Ridgetop...........West winds 7 to 9 mph becoming 11 to 14 mph by
                    late afternoon. Gusts up to 18 mph after 1500.
                    Gusty and erratic winds expected near
                    thunderstorms late in the afternoon.
Mixing height.......3500 ft AGL.
Transport winds.....Southwest 5 to 10 mph.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........93  93  93  93  93  71  71  71  53  53  53  88
Weather cov.....                        SCH CHC CHC CHC CHC DEF
Weather type....                        RN  RN  RW  RW  RW  RW
Tstm cov........                                SCH SCH SCH SCH
CWR.............10  10  10  10  10  10  10  10  10  10  10  80
Chc of ltng (%).0   0   0   0   0   0   0   0   20  20  20  20
Temp............48  44  43  44  46  48  51  53  54  54  52  49
RH..............75  82  83  84  83  81  80  75  73  79  83  92
20 FT wind dir..W   W   SW  SW  SW  SW  SW  SW  SW  SW  SW  W
20 FT wind spd..3   3   3   3   3   4   4   5   6   7   8   9
20 FT wind gust.6   6   6   6   6   10  10  10  12  14  16  18
Ridge wind dir..W   W   SW  SW  SW  SW  SW  SW  SW  SW  SW  W
Ridge wind spd..6   6   6   6   6   10  10  10  11  12  13  14
Mix hgt (kft)...0.2 0.3 0.3 0.9 1.7 2.2 2.4 3.0 3.5 3.3 3.3 2.4
Transp wind dir.SW  SW  SW  SW  SW  SW  SW  SW  SW  W   W   W
Transp wind spd.5   5   5   5   6   6   8   9   10  9   9   9

$$
Forecaster...Hall
Requested by...Brian Scott
Type of request...WILDFIRE
.TAG 2621427.2/PQR
.DELDT 09/11/26
.FormatterVersion 2.0.0
.EMAIL keith.mcmillen@usda.gov,brian.scott@usda.gov