Suppression Forecast
Issued by NWS Portland, OR
Issued by NWS Portland, OR
018
FNUS76 KPQR 010117
FWSPQR
Spot Forecast for Piper Lake Fire...SA-Gray Team
National Weather Service Portland OR
617 PM PDT Thu Jul 31 2025
Forecast is based on forecast start time of 0600 PDT on August 01.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...10-15% chance of thunderstorms end this evening, by
2000 Thursday. Another 15-20% chance of thunderstorms from 1400 to
1900 Friday. Fire weather concerns remain low with near average
temperatures and good overnight humidity recoveries each day.
15-25% chance of wetting rain and thunderstorms return late Sunday.
.FRIDAY...
Sky/weather.........Mostly sunny then becoming partly cloudy then
becoming partly sunny. Slight chance of showers
and thunderstorms early in the afternoon.
Slight chance of rain showers late in the
afternoon.
CWR.................9 percent.
Chance of thunder...17 percent.
Max temperature.....69 to 74.
Min humidity........43 to 48 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 early in the
afternoon.
Ridgetop...........Light winds becoming northwest 7 to 9 mph late
in the morning with gusts 14-16 mph. Gusty and
erratic winds expected near thunderstorms early
in the afternoon.
Mixing height.......4900 ft AGL.
Transport winds.....North 3 to 6 mph shifting to the west 7 to 9
mph in the afternoon.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........17 9 5 4 4 6 5 10 43 36 45 57
Weather cov..... SCH SCH SCH
Weather type.... RW RW RW
Tstm cov........ SCH SCH
CWR.............10 10 10 10 10 10 10 10 10 10 10 0
Chc of thdr (%).0 0 0 0 0 0 0 10 20 20 10 10
Temp............49 51 55 58 63 65 67 68 69 69 69 69
RH..............81 75 64 59 55 50 51 48 48 48 49 52
20 FT wind dir..N NW NW NW NW NW NW NW NW NW NW NW
20 FT wind spd..3 3 3 3 4 5 6 6 6 6 6 7
20 FT wind gust.6 6 5 6 7 10 10 11 12 12 12 13
Ridge wind dir..N NW NW NW NW NW NW NW NW NW NW NW
Ridge wind spd..3 3 3 5 5 6 7 7 8 8 8 9
Mix hgt (kft)...0.1 0.1 0.1 0.8 1.7 2.8 3.9 4.9 4.8 4.4 3.9 3.6
Transp wind dir.N NE N N NW NW W W NW W W W
Transp wind spd.3 3 3 5 5 6 7 7 8 8 8 9
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy. Slight chance of rain showers in
the evening.
CWR.................3 percent.
Chance of thunder...11 percent.
Min temperature.....45 to 49.
Max humidity........79 to 84 percent.
Wind (20 ft)........
Slope/valley.......Northwest winds 5 to 7 mph in the evening and
overnight becoming light.
Ridgetop...........Northwest winds 3 to 5 mph in the evening and
overnight becoming light.
Mixing height.......0 ft AGL.
Transport winds.....Northwest 3 to 10 mph.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........57 57 47 47 47 47 47 47 37 37 37 18
Weather cov.....SCH SCH SCH SCH SCH
Weather type....RW RW RW RW RW
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).10 10 0 0 0 0 0 0 0 0 0 0
Temp............67 64 63 57 56 54 53 51 50 50 49 49
RH..............53 58 62 69 71 73 75 77 79 79 78 78
20 FT wind dir..NW NW NW NW NW NW NW NW NW NW NW NW
20 FT wind spd..7 7 6 6 6 5 5 5 3 3 3 2
20 FT wind gust.13 13 11 11 11 8 8 8 6 6 6 5
Ridge wind dir..NW NW NW NW NW NW NW NW NW NW NW NW
Ridge wind spd..7 7 6 6 6 5 5 5 3 3 3 2
Mix hgt (kft)...2.2 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.W NW NW NW NW NW NW NW NW NW NW NW
Transp wind spd.10 9 7 7 7 6 6 6 3 3 5 5
.SATURDAY...
Sky/weather.........Mostly sunny.
CWR.................4 percent.
Chance of thunder...11 percent.
Max temperature.....68 to 73.
Min humidity........44 to 49 percent.
Wind (20 ft)........
Slope/valley.......Light winds becoming northwest 5 to 8 mph late
in the morning.
Ridgetop...........Light winds becoming northwest 7 to 10 mph
late in the morning with gusts 15 to 17 mph.
Mixing height.......5200 ft AGL.
Transport winds.....Northwest around 5 mph shifting to the west
late in the morning.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........18 18 14 14 14 19 19 19 19 19 19 19
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 10 10 10 10 10 10 10
Temp............51 53 55 58 61 64 65 66 67 67 67 67
RH..............73 69 64 60 56 52 52 51 51 52 54 55
20 FT wind dir..NW NW NW NW NW NW NW NW NW NW NW NW
20 FT wind spd..2 2 2 2 2 5 5 5 7 7 7 8
20 FT wind gust.5 5 5 5 5 10 10 10 13 13 13 14
Ridge wind dir..NW NW NW NW NW NW NW NW NW NW NW NW
Ridge wind spd..5 5 5 5 5 6 7 8 9 10 10 10
Mix hgt (kft)...0.1 0.1 0.1 1.1 2.4 3.6 4.5 5.0 5.2 5.0 4.4 3.6
Transp wind dir.NW N N NW W W W W W W W W
Transp wind spd.5 5 5 5 5 6 7 8 9 10 10 10
.FORECAST DAYS 3 THROUGH 7...
.SUNDAY...
Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the lower 60s.
Northwest winds around 5 mph.
.MONDAY...
Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs in the upper 50s. West
winds around 6 mph.
.TUESDAY...
Partly cloudy. Lows in the lower 40s. Highs in the mid 60s. West
winds around 5 mph.
.WEDNESDAY...
Partly cloudy. Lows in the mid 40s. Highs in the upper 60s.
.THURSDAY...
Partly cloudy. Lows in the upper 40s. Highs in the upper 60s.
$$
Forecaster...Hall
Requested by...Mark Huff, PSC3
Type of request...WILDFIRE
.TAG 2518848.2/PQR
.DELDT 07/30/25
.FormatterVersion 2.0.0
.EMAIL mark_huff@firenet.gov,2025.piperlake.plans@firenet.gov