Suppression Forecast
Issued by NWS Portland, OR
Issued by NWS Portland, OR
984
FNUS76 KPQR 300224
FWSPQR
Spot Forecast for Piper Lake Fire...SA-Gray Team
National Weather Service Portland OR
724 PM PDT Tue Jul 29 2025
Forecast is based on forecast start time of 0700 PDT on July 30.
If conditions become unrepresentative, contact the National Weather
Service.
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT WEDNESDAY...
...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH
THURSDAY MORNING...
.DISCUSSION...Expect diurnally driven winds Wednesday. There is a
30-40% chance for a thunderstorm to impact the site between 1500
and 1900. Gusty erratic winds and dangerous cloud to ground
lightning will be the main threats with any thunderstorms that
develop. There is a 20% chance for thunderstorms Thursday. Relative
humidity will trend upward between Wednesday and Thursday with a
20-30% chance of a wetting rain each day.
.WEDNESDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny then
becoming partly cloudy then becoming mostly
cloudy. Slight chance of showers and
thunderstorms early in the afternoon. Chance of
showers and thunderstorms late in the
afternoon.
CWR.................32 percent.
Chance of lightning.34 percent.
Max temperature.....75-79.
Min humidity........37-42 percent.
Wind (20 ft)........
Slope/valley.......Light winds becoming east around 5 mph late in
the morning, then shifting to the northeast
early in the afternoon shifting to the
northwest early in the afternoon shifting to
the southwest in the mid to late afternoon.
Gusty and erratic winds expected near
thunderstorms late in the afternoon.
Ridgetop...........
Mixing height.......Rising to 7000 ft AGL in the afternoon.
Transport winds.....East 5 to 9 mph shifting to the northeast 7 to
9 mph early in the afternoon, then shifting to
the south around 10 mph late in the afternoon
shifting to the north around 14 mph late in the
afternoon.
TIME (PDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........26 22 11 9 15 20 24 43 59 71 85
Weather cov..... SCH CHC CHC CHC
Weather type.... RW RW RW RW
Tstm cov........ SCH CHC CHC CHC
CWR.............30 30 30 30 30 30 30 30 30 30 30
Chc of ltng (%).0 0 0 0 0 0 0 20 30 30 30
Temp............56 61 65 69 72 74 74 74 73 73 68
RH..............54 45 42 41 40 40 40 41 45 51 62
20 FT wind dir..E E E E E NE NW NW W SW SW
20 FT wind spd..4 4 4 4 5 5 5 5 5 5 5
20 FT wind gust.6 6 6 7 8 8 8 10 8 10 10
Ridge wind dir..M M M M M M M M M M M
Ridge wind spd..M M M M M M M M M M M
Mix hgt (kft)...0.1 0.1 1.0 2.7 4.9 6.5 5.9 5.0 4.0 3.4 2.1
Transp wind dir.E E E E E SE SE NE NE S N
Transp wind spd.5 6 7 8 8 9 8 7 9 10 14
.WEDNESDAY NIGHT...
Sky/weather.........Mostly cloudy. A chance of showers and
thunderstorms, particularly in the evening.
CWR.................32 percent decreasing to 21 percent early in
the morning.
Chance of lightning.34 percent.
Min temperature.....50-54.
Max humidity........75-85 percent.
Wind (20 ft)........
Slope/valley.......Southwest winds around 5 mph shifting to the
northwest early in the evening, then becoming
light overnight. Gusty and erratic winds
expected near thunderstorms in the evening.
Ridgetop...........
Mixing height.......Less than 500 ft AGL.
Transport winds.....West 5-10 mph shifting to the north early in
the evening, then shifting to the northeast
10-15 mph early in the evening shifting to
the northwest around 5 mph overnight.
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........85 85 85 85 85 87 87 87 72 72 72 60
Weather cov.....CHC CHC CHC CHC CHC SCH SCH SCH SCH SCH SCH CHC
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........CHC CHC CHC CHC CHC SCH SCH SCH SCH SCH SCH SCH
CWR.............30 30 30 30 30 30 30 30 30 30 30 20
Chc of ltng (%).30 30 30 30 30 20 20 20 20 20 20 20
Temp............66 64 61 59 58 56 56 55 55 54 54 53
RH..............65 67 67 74 72 71 73 75 77 77 77 77
20 FT wind dir..SW SW NW NW NW W W W SE SE SE W
20 FT wind spd..5 5 5 5 5 5 5 5 4 4 4 4
20 FT wind gust.10 10 8 8 8 10 10 10 7 7 7 6
Ridge wind dir..M M M M M M M M M M M M
Ridge wind spd..M M M M M M M M M M M M
Mix hgt (kft)...0.6 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.W N E E E E E N N N NW NW
Transp wind spd.8 12 9 9 12 14 12 8 5 5 5 5
.THURSDAY...
Sky/weather.........Partly sunny. A chance of showers and
a slight chance of thunderstorms,
particularly in the afternoon.
CWR.................20 percent.
Chance of lightning.20 percent.
Max temperature.....63-65.
Min humidity........65-75 percent.
Wind (20 ft)........
Slope/valley.......Light winds becoming northwest 5 to 6 mph early
in the morning. Gusty and erratic winds
expected near thunderstorms.
Ridgetop...........
Mixing height.......Rising to 3000 ft AGL in the afternoon.
Transport winds.....Northwest 5 to 10 mph.
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........60 60 70 70 70 67 67 67 67 67 67 71
Weather cov.....CHC CHC CHC CHC CHC CHC CHC 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 SCH SCH
CWR.............20 20 20 20 20 20 20 20 20 20 20 10
Chc of ltng (%).20 20 10 10 10 20 20 20 20 20 20 20
Temp............54 55 56 57 59 60 61 62 63 63 63 62
RH..............76 74 73 73 72 72 72 72 72 72 71 71
20 FT wind dir..W W W W W NW NW NW NW NW NW NW
20 FT wind spd..4 4 5 5 5 5 5 5 6 6 6 6
20 FT wind gust.6 6 7 7 7 10 10 10 11 11 11 12
Ridge wind dir..M M M M M M M M M M M M
Ridge wind spd..M M M M M M M M M M M M
Mix hgt (kft)...0.1 0.1 0.2 0.8 1.5 2.0 2.2 2.2 2.2 2.4 2.7 2.6
Transp wind dir.NW NW NW NW NW NW NW W W W W W
Transp wind spd.5 6 6 6 7 7 7 8 8 9 10 10
.FORECAST DAYS 3 THROUGH 7...
.FRIDAY...
Partly cloudy with chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the upper 60s.
Light winds.
.SATURDAY...
Partly cloudy. Lows in the upper 40s. Highs in the mid 60s. Light
winds.
.SUNDAY...
Partly cloudy. Lows in the mid 40s. Highs in the lower 60s. West
winds around 5 mph.
.MONDAY...
Partly cloudy. Lows in the lower 40s. Highs in the lower 60s.
.TUESDAY...
Partly cloudy. Lows in the mid 40s. Highs in the mid 60s.
$$
Forecaster...Neuman
Requested by...Mark Huff, PSC3
Type of request...WILDFIRE
.TAG 2518848.0/PQR
.DELDT 07/29/25
.FormatterVersion 2.0.0
.EMAIL mark_huff@firenet.gov,2025.piperlake.plans@firenet.gov