Spot Forecast
Issued by NWS Portland, OR
Issued by NWS Portland, OR
750
FNUS76 KPQR 272357
FWSPQR
Spot Forecast for Cascade Head Non-Broadcast Burn...The Nature Conservancy
National Weather Service Portland OR
357 PM PST Thu Feb 27 2025
Forecast is based on ignition time of 0800 PST on February 28.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...High pressure will maintain dry weather on Friday
with mostly sunny skies. Weak pressure gradients will support
light northerly to northeasterly winds on Friday. The slight
easterly component to the wind will support moderate daytime
humidity. Expect high overnight humidity recoveries Friday night.
Winds will turn more southerly early Saturday morning as the
next frontal system approaches the region. Chances for light rain
return Saturday, with amounts generally under one tenth of an
inch.
.FRIDAY...
Sky/weather.........Partly cloudy then becoming mostly sunny then
becoming partly cloudy then becoming mostly
sunny.
CWR.................2 percent.
Max temperature.....Around 56.
Min humidity........58-63 percent.
Wind (20 ft)........
Slope/valley.......Light northeast winds under 5 mph becoming north
5 to 7 mph by the late morning.
Ridgetop...........Light northeast winds under 5 mph increasing to
7 to 9 mph by the late morning.
Mixing height.......1000 ft AGL.
Transport winds.....North 7 to 10 mph.
TIME (PST) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........33 26 22 16 21 22 23 29 25 25
CWR.............0 0 0 0 0 0 0 0 0 0
Temp............47 48 50 51 52 53 53 54 55 53
RH..............71 71 67 67 66 64 64 63 61 63
20 FT wind dir..NE N N N N N N N N N
20 FT wind spd..4 4 5 6 6 7 7 7 6 6
20 FT wind gust.5 5 6 7 10 10 10 10 10
Ridge wind dir..NE NE NE NE NE NE NE NE NE NE
Ridge wind spd..4 5 6 7 7 7 8 8 9 9
Mix hgt (kft)...0.7 0.7 0.8 0.8 1.0 1.0 0.8 0.8 0.8 0.7
Transp wind dir.NE NE NE N N N N N N N
Transp wind spd.7 7 7 7 8 9 9 9 10 8
.FRIDAY NIGHT...
Sky/weather.........Partly cloudy in the evening then becoming
mostly cloudy overnight. Chance of rain returns
after 3 am.
CWR.................3 percent.
Min temperature.....Around 46.
Max humidity........88-93 percent.
Wind (20 ft)........
Slope/valley.......North winds 5 to 6 mph early in the evening
becoming southwest under 5 mph by 2 to 4 AM.
Ridgetop...........Northeast winds 6 to 8 mph early in the evening
becoming southwest 5 to 7 mph by 2 to 4 AM.
Mixing height.......600 ft AGL.
Transport winds.....North 6 to 8 mph shifting to the east around 5
mph overnight, then shifting to the southeast
overnight shifting to the southwest 5 to 7 mph
after 3 am.
TIME (PST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........25 45 45 45 44 44 44 45 45 45 61 61
Weather cov..... CHC CHC
Weather type.... RN RN
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Temp............53 51 51 50 49 49 48 48 48 47 47 47
RH..............85 85 88 88 88 88 88 88 86 84 82 82
20 FT wind dir..N N N N N N N NE SE S SW SW
20 FT wind spd..6 5 5 5 4 4 4 4 4 4 4 4
20 FT wind gust.10 8 8 8 6 6 6 6 6 6 6 6
Ridge wind dir..NE NE NE NE NE NE NE E SE S SW SW
Ridge wind spd..8 8 7 6 6 5 5 5 6 6 7 7
Mix hgt (kft)...0.7 0.7 0.6 0.6 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7
Transp wind dir.N NE N N N NE E E SE S SW SW
Transp wind spd.8 7 6 6 6 6 5 5 5 5 6 7
.SATURDAY...
Sky/weather.........Mostly cloudy. Chance of rain in the morning
and early afternoon, then rain likely late in
the afternoon.
CWR.................7 percent.
Max temperature.....Around 51.
Min humidity........73-78 percent.
Wind (20 ft)........
Slope/valley.......Southwest 5 to 7 mph.
Ridgetop...........Southwest 8 to 10 mph with gusts up to 15 mph.
Mixing height.......2200 ft AGL.
Transport winds.....South 9 to 12 mph.
TIME (PST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........61 71 71 71 74 74 74 79 79 79 82 82
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC LKY LKY
Weather type....RN RN RN RN RN RN RN RN RN RN RN RN
CWR.............0 0 0 0 0 0 0 0 0 0 10 10
Temp............47 46 47 47 48 48 48 49 49 49 49 49
RH..............83 84 86 87 89 92 95 96 94 91 88 87
20 FT wind dir..SW S S S S S S SW SW SW SW SW
20 FT wind spd..4 5 5 5 6 6 6 6 6 6 7 7
20 FT wind gust.6 8 8 8 10 10 10 11 11 11 11 11
Ridge wind dir..SW SW SW SW SW SW SW SW SW SW SW SW
Ridge wind spd..7 7 7 8 8 8 9 9 9 10 10 10
Mix hgt (kft)...0.7 0.8 1.2 1.6 1.9 2.1 2.2 2.2 2.2 2.1 1.9 1.5
Transp wind dir.S S S S S S S S S SW SW S
Transp wind spd.9 10 12 12 12 12 12 12 12 12 12 10
$$
Forecaster...Alviz
Requested by...Catherine Dunn
Type of request...PRESCRIBED
.TAG 2503726.2/PQR
.DELDT 02/27/25
.FormatterVersion 2.0.0
.EMAIL grayson.smith@tnc.org,mike.beachy@tnc.org,cdunn@tnc.org,katie.sauerbrey@tnc.org,charlie.redheffer@odf.oregon.gov