314
FNUS76 KPQR 222258
FWSPQR

Spot Forecast for Purcell Tire Fire...Gresham Fire Department
National Weather Service Portland OR
358 PM PDT Fri Aug 22 2025

Forecast is based on forecast start time of 1600 PDT on August 22.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Hot and critically dry conditions through Saturday.
Minimum daytime relative humidity today is around 15-20%, and
will be similar tomorrow afternoon. Winds will be out of the east-
northeast this afternoon 10-15 mph with gusts up to 20 mph. Winds
ease overnight and shift more northerly 5-6 mph. Expect poor to
moderate overnight humidity recoveries. Winds become east-
northeasterly tomorrow with gusts up to 16 mph in the afternoon.

.REST OF TODAY...

Sky/weather.........Sunny.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 99.
Min humidity........17 percent.
Dewpoint............48.
Surface winds.......Northeast winds around 10 mph.
Mixing height.......3400 ft AGL.
Transport winds.....East around 16 mph.
Rainfall amount.....0.00 inches.
CEILING (KFT).......25.
Visibility (SM)......10.

TIME (PDT)      4PM 5PM
Sky (%).........3   2
Chc of pcpn (%).0   0
Chc of ltng (%).0   0
Temp............97  99
Dewpoint........48  48
RH..............19  18
Surface wnd dir.NE  NE
Surface wnd spd.10  10
Surface wnd gst.18  18
Mix hgt (kft)...3.4 3.3
Transp wind dir.E   E
Transp wind spd.16  16
Ceiling (kft)...25  25
Visibility (sm).10  10

.TONIGHT...

Sky/weather.........Mostly clear.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 67.
Max humidity........53 percent.
Dewpoint............49 increasing to 52 overnight.
Surface winds.......Northeast winds 6 to 10 mph shifting to the
                    north around 6 mph overnight.
Mixing height.......400 ft AGL.
Transport winds.....Northeast 7 to 15 mph.
Rainfall amount.....0.00 inches.
CEILING (KFT).......25.
Visibility (SM)......10.

TIME (PDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........0   2   2   3   3   0   17  26  25  21  26  26
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............97  95  91  86  83  80  77  75  73  71  69  69
Dewpoint........48  50  50  50  51  51  53  54  53  51  51  51
RH..............19  22  25  29  33  37  44  48  49  50  52  52
Surface wnd dir.NE  NE  NE  NE  NE  NE  N   N   N   N   N   N
Surface wnd spd.10  9   8   8   6   6   6   6   6   6   6   6
Surface wnd gst.17  16  14  13  12  10  12  12  12  10  10  9
Mix hgt (kft)...2.3 1.1 0.6 0.6 0.7 0.7 0.6 0.6 0.6 0.5 0.4 0.4
Transp wind dir.E   E   E   E   NE  E   E   NE  NE  NE  NE  NE
Transp wind spd.15  14  9   7   7   7   7   7   7   7   7   7
Ceiling (kft)...25  25  25  25  25  25  25  25  25  25  25  25
Visibility (sm).10  10  10  10  10  10  10  10  10  10  10  10

.SATURDAY...

Sky/weather.........Partly cloudy.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Max temperature.....Around 101.
Min humidity........19 percent.
Dewpoint............51.
Surface winds.......North winds around 6 mph shifting to the
                    northeast 6 to 8 mph with gusts up to 16 mph
                    in the late morning and afternoon.
Mixing height.......4800 ft AGL.
Transport winds.....East 7 to 13 mph.
Rainfall amount.....0.00 inches.
CEILING (KFT).......25.
Visibility (SM)......10.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........38  37  40  43  45  63  69  56  40  34  33  46
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Chc of ltng (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............67  69  71  76  83  87  90  94  98  99  101 100
Dewpoint........49  51  53  53  52  51  52  52  51  51  51  50
RH..............53  53  53  45  34  29  27  24  21  20  19  19
Surface wnd dir.N   N   N   NE  E   E   E   E   E   NE  NE  NE
Surface wnd spd.6   6   6   6   6   6   8   8   8   8   8   8
Surface wnd gst.9   9   9   9   12  12  12  13  13  13  13  13
Mix hgt (kft)...0.4 0.5 0.6 1.0 1.4 1.7 2.2 3.2 4.0 4.4 4.8 4.0
Transp wind dir.NE  E   E   E   E   E   E   E   E   E   E   NE
Transp wind spd.7   8   7   9   13  13  13  12  10  9   9   9
Ceiling (kft)...25  25  25  25  25  25  25  25  25  25  25  25
Visibility (sm).10  10  10  10  10  10  10  10  10  10  10  10

$$
Forecaster...Alviz
Requested by...Denny Dahlgren
Type of request...HAZMAT
.TAG 2520480.0/PQR
.DELDT 08/22/25
.FormatterVersion 2.0.0
.EMAIL gfd@greshamoregon.gov