Suppression Forecast
Issued by NWS Portland, OR
Issued by NWS Portland, OR
059
FNUS76 KPQR 310052
FWSPQR
Spot Forecast for Piper Lake Fire...SA-Gray Team
National Weather Service Portland OR
552 PM PDT Wed Jul 30 2025
Forecast is based on forecast start time of 0600 PDT on July 31.
If conditions become unrepresentative, contact the National Weather
Service.
...RED FLAG WARNING IN EFFECT UNTIL 11 PM PDT THIS EVENING...
.DISCUSSION...15-20% chance of thunderstorms until 2300. Another
15-20% chance of thunderstorms from 1100 to 2300 Thursday. Any
thunderstorms that form could bring gusty erratic winds and
dangerous cloud to ground lightning. Moderate RH recovery each
night. 15-20% chance of wetting rain Thursday and Friday.
.THURSDAY...
Sky/weather.........Mostly cloudy. Chance of rain showers and
slight chance of thunderstorms.
CWR.................14 percent decreasing to 3 percent late in the
afternoon.
Chance of lightning.15 percent.
Max temperature.....Around 67 to 72.
Min humidity........58 to 63 percent.
Wind (20 ft)........
Slope/valley.......Light winds becoming northwest 5 to 6 mph in
the late morning and afternoon. Gusty and
erratic winds expected near thunderstorms late
in the morning.
Ridgetop...........Light winds becoming northwest winds 6 to 8
mph with gusts to 15 mph in the afternoon.
Mixing height.......3700 ft AGL.
Transport winds.....Northwest around 6 mph shifting to the
northeast 6 to 7 mph in the morning, then
shifting to the northwest 7 to 8 mph in the
afternoon.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........67 65 79 73 79 66 73 79 72 67 85 86
Weather cov.....SCH SCH CHC CHC SCH SCH SCH CHC CHC CHC CHC CHC
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH SCH SCH SCH SCH
CWR.............10 10 10 10 10 10 10 10 10 10 10 0
Chc of ltng (%).0 0 10 10 10 20 20 20 20 20 20 20
Temp............52 54 56 59 61 62 65 66 66 67 67 66
RH..............76 76 70 67 69 67 66 65 65 65 65 68
20 FT wind dir..NW NW N NW NW NW NW NW NW NW NW NW
20 FT wind spd..3 4 4 4 5 5 5 6 6 6 6 6
20 FT wind gust.6 6 6 6 7 10 10 10 10 11 11 11
Ridge wind dir..NW NW N NW NW NW NW NW NW NW NW NW
Ridge wind spd..5 5 5 5 6 6 6 7 7 7 8 8
Mix hgt (kft)...0.1 0.1 0.1 0.5 1.6 2.3 2.9 3.6 3.7 2.7 2.2 2.0
Transp wind dir.NW NE NE NE NE E E NW NW W NW NW
Transp wind spd.6 6 7 7 7 6 6 7 7 7 8 8
.THURSDAY NIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Chance of rain showers and slight chance of
thunderstorms in the evening.
CWR.................3 percent increasing to 13 percent early in the
morning.
Chance of lightning.15 percent.
Min temperature.....Around 45 to 50.
Max humidity........87 to 92 percent.
Wind (20 ft)........
Slope/valley.......Northwest winds 5 to 6 mph in the evening and
overnight becoming light. Gusty and erratic
winds expected near thunderstorms in the
evening.
Ridgetop...........Light northwest to west winds 4 to 5 mph.
Mixing height.......0 ft AGL.
Transport winds.....Northwest 5 to 8 mph shifting to the north
around 5 mph early in the morning.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........86 86 71 71 71 65 65 65 56 56 56 31
Weather cov.....CHC CHC CHC CHC CHC
Weather type....RW RW RW RW RW
Tstm cov........SCH SCH SCH SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 10
Chc of ltng (%).20 20 20 20 20 10 10 10 0 0 0 0
Temp............65 64 60 57 55 55 54 52 51 50 50 49
RH..............67 70 74 80 84 82 83 85 87 86 85 85
20 FT wind dir..NW NW NW NW NW W W W W W W W
20 FT wind spd..6 6 5 5 5 5 5 5 4 4 4 3
20 FT wind gust.11 11 10 10 10 10 10 10 6 6 6 6
Ridge wind dir..NW NW NW NW NW W W W W W W W
Ridge wind spd..5 5 5 5 5 4 4 4 4 3 3 3
Mix hgt (kft)...0.9 0.5 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.NW NW NW NW NW NW NW NW NW NW N N
Transp wind spd.8 8 7 8 8 7 6 6 5 5 5 5
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny then
becoming partly cloudy. Slight chance of rain
showers late in the morning. Slight chance of
thunderstorms late in the afternoon.
CWR.................13 percent decreasing to 3 percent late in the
afternoon.
Chance of lightning.18 percent.
Max temperature.....Around 68 to 73.
Min humidity........47 to 52 percent.
Wind (20 ft)........
Slope/valley.......Light winds becoming northwest 5 to 7 mph late
in the morning. Gusty and erratic winds
expected near thunderstorms late in the
afternoon.
Ridgetop...........Light winds becoming northwest winds 7 to 9
mph with gusts to 16 mph in the afternoon.
Mixing height.......5900 ft AGL.
Transport winds.....Northwest 5 to 6 mph increasing to 6 to 9 mph
late in the morning.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........31 31 17 17 17 43 43 43 43 43 43 48
Weather cov..... SCH SCH SCH SCH SCH SCH SCH
Weather type.... RW RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH
CWR.............10 10 10 10 10 10 10 10 10 10 10 0
Chc of ltng (%).0 0 0 0 0 10 10 10 20 20 20 10
Temp............51 53 55 58 60 63 65 66 68 68 67 67
RH..............80 75 70 66 62 58 57 55 53 53 54 54
20 FT wind dir..W W NW NW NW NW NW NW NW NW NW NW
20 FT wind spd..3 3 4 4 4 5 5 5 6 6 6 7
20 FT wind gust.6 6 6 6 6 10 10 10 12 12 12 13
Ridge wind dir..NW NW NW NW NW NW NW NW NW NW NW NW
Ridge wind spd..5 5 5 5 6 6 7 7 8 9 9 9
Mix hgt (kft)...0.1 0.1 0.1 1.0 2.1 3.3 4.4 5.4 5.9 5.7 5.0 4.0
Transp wind dir.N NW NW NW NW NW NW W W W NW NW
Transp wind spd.5 5 5 5 6 6 7 7 8 8 8 9
.FORECAST DAYS 3 THROUGH 7...
.SATURDAY...
Partly cloudy. Slight chance of showers. Lows in the upper 40s.
Highs in the upper 60s. Light winds.
.SUNDAY...
Partly cloudy with slight chance of showers and thunderstorms.
Lows in the upper 40s. Highs in the lower 60s. West winds around
5 mph.
.MONDAY...
Partly cloudy. Slight chance of showers. Lows in the mid 40s.
Highs in the lower 60s. West winds around 6 mph.
.TUESDAY...
Partly cloudy. Lows in the lower 40s. Highs in the mid 60s.
.WEDNESDAY...
Partly cloudy. Lows in the upper 40s. Highs in the upper 60s.
$$
Forecaster...Hall
Requested by...Mark Huff, PSC3
Type of request...WILDFIRE
.TAG 2518848.1/PQR
.DELDT 07/30/25
.FormatterVersion 2.0.0
.EMAIL mark_huff@firenet.gov,2025.piperlake.plans@firenet.gov