Spot Forecast
Issued by NWS Portland, OR

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Spot Forecast for Drano Pile RX...USFS
National Weather Service Portland OR
629 PM PST Tue Nov 18 2025

Forecast is based on ignition time of 0700 PST on November 19.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Dry conditions are expected to persist through
Wednesday as a quick moving ridge of high pressure moves overhead.
However, easterly winds increase with gusts peaking late morning
before slowly decreasing Wednesday night. Another weak frontal
boundary moves overhead for Thursday bringing light rain to the
local area and an east to west wind switch.


.WEDNESDAY...

Sky/weather.........Partly cloudy.
Max temperature.....46-49.
Min humidity........60-65 percent.
Wind (20 ft)........
 Slope/valley.......East winds 9 to 14 mph with gusts to around 20 to
25 mph.
Mixing height.......3200 ft AGL.
Transport winds.....East 13 to 18 mph.

TIME (PST)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........30  21  34  26  22  37  40  41  40  48  61
Weather cov.....
Weather type....
Tstm cov........
Temp............37  38  39  40  42  44  46  46  47  45  45
RH..............79  79  80  78  76  69  64  63  65  68  66
20 FT wind dir..E   E   E   E   E   E   E   E   E   E   E
20 FT wind spd..12  13  13  14  14  14  14  12  11  9   9
20 FT wind gust.19  20  22  25  22  22  22  20  18  17  17
Mix hgt (kft)...1.5 1.6 2.1 2.5 2.8 3.2 3.1 3.1 2.7 2.1 1.9
Transp wind dir.E   E   E   E   E   E   E   E   E   E   E
Transp wind spd.15  16  16  17  17  18  17  17  15  14  13

.WEDNESDAY NIGHT...

Sky/weather.........Mostly cloudy. Chance of rain in the late
                    evening and overnight. Rain likely after 3 am.
Min temperature.....40-44.
Max humidity........90-95 percent.
Wind (20 ft)........
 Slope/valley.......East winds 5 to 10 mph. Gusts up to 20 mph early
                    in the evening.
Mixing height.......1500 ft AGL.
Transport winds.....East 6 to 12 mph.

TIME (PST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........69  67  69  74  78  78  78  86  86  86  84  84
Weather cov.....                CHC CHC CHC CHC CHC CHC LKY LKY
Weather type....                RN  RN  RN  RN  RN  RN  RN  RN
Tstm cov........
Temp............45  44  44  43  42  42  41  41  41  41  41  41
RH..............66  66  67  69  70  72  73  75  77  79  81  81
20 FT wind dir..E   E   E   E   E   E   E   E   E   E   E   E
20 FT wind spd..9   8   8   8   7   7   7   6   6   6   5   5
20 FT wind gust.17  16  16  16  14  14  14  10  10  10  10  10
Mix hgt (kft)...1.9 1.8 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
Transp wind dir.E   E   E   E   E   E   E   E   E   E   E   E
Transp wind spd.12  12  10  10  9   9   9   7   7   7   6   6

.THURSDAY...

Sky/weather.........Mostly cloudy then becoming partly cloudy. Rain
                    likely early in the morning, then chance of
                    showers in the late morning and early afternoon.
Max temperature.....47-51.
Min humidity........70-75 percent.
Wind (20 ft)........
 Slope/valley.......East winds 5 to 10 mph shifting to the
                    west-northwest around 5 to 10 mph mph early
in the afternoon, then shifting to the southwest
late in the afternoon.
Mixing height.......3400 ft AGL.
Transport winds.....East 6 to 9 mph shifting to the southeast
                    around 10 mph late in the morning, then
                    shifting to the southwest 10 to 12 mph early in
                    the afternoon.

TIME (PST)      6 AM         10 AM        2 PM
Sky (%).........84           59           58
Weather cov.....LIKELY       CHANCE       CHANCE
Weather type....RAIN         RAIN         RAIN
Tstm cov........
Temp............42           43           48
RH..............82           87           78
20 FT wind......E 5G10       NE 6G10      NW 5G10
Mix hgt (ft)....1400         2300         3000
Transport wind..E 6          E 9          SW 10

$$
Forecaster...Schuldt
Requested by...Lauren Clark
Type of request...PRESCRIBED
.TAG 2526133.1/PQR
.DELDT 11/18/25
.FormatterVersion 2.0.0
.EMAIL roland.rose@usda.gov,lauren.clark@usda.gov