Suppression Forecast
Issued by NWS Portland, OR

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Spot Forecast for Rider 990...USFS
National Weather Service Portland OR
626 AM PDT Tue May 23 2017

Forecast is based on ignition time of 0700 PDT on May 23.
If conditions become unrepresentative...contact the National Weather
Service Portland, Oregon office.

.DISCUSSION...
Thermal trough over the I-5 corridor early this morning will move
east of the Cascades late this morning and this afternoon,
producing a marine push later this afternoon and evening. An upper
level system will move through Washington and clip northwest Oregon
tonight with brisk westerly flow aloft but the threat of spotty
precipitation is mainly north of the fire area. A cool upper trough
will carve out over the Pacific Northwest Wednesday with
northwesterly flow aloft and again spotty precipitation mainly
north of the fire area.

.TODAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
LAL.................1.
Max temperature.....77-82.
Min humidity........27-32 percent.
Wind (20 ft)........
 Slope/valley.......Northeast winds 2 to 4 mph early morning
                    becoming Upslope 4 to 8 mph, then becoming west
                    5 to 9 mph late in the morning increasing to 8
                    to 12 mph with gusts to 25 mph in the
                    mid to late afternoon.

TIME (PDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM

Temp............58  62  66  69  73  76  79  77  76  75  74
RH..............67  58  50  45  40  32  29  34  36  36  37
20 FT wind dir..NE  S   S   S   W   W   W   W   W   W   W
20 FT wind spd..4   3   3   3   7   7   7   9   9   9   13
20 FT wind gust.7   5   5   5   10  10  10  20  20  25  25

.TONIGHT...

Sky/weather.........Partly cloudy becoming partly to mostly
                    cloudy after midnight.
CWR.................0 percent.
LAL.................1.
Min temperature.....40-45.
Max humidity........81-86 percent.
Wind (20 ft)........
 Slope/valley.......West winds 7 to 13 mph with gusts to 25 mph
                    decreasing to 3 to 5 mph late.

TIME (PDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM

Temp............71  67  62  58  53  50  47  46  44  43  41  40
RH..............39  43  52  57  66  71  76  76  82  82  85  85
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..13  13  11  11  11  9   9   9   9   9   9   5
20 FT wind gust.25  25  20  20  20  15  15  15  15  15  15

.WEDNESDAY...

Sky/weather.........Partly  to mostly cloudy in the morning then
                    becoming partly cloudy.
CWR.................0 percent.
LAL.................1.
Max temperature.....54-60.
Min humidity........30-35 percent.
Wind (20 ft)........
 Slope/valley.......Northwest winds 5 to 9 mph. Gusts to 20 mph.

$$
Forecaster...Tolleson
Requested by...Dirk Rogers
Type of request...PRESCRIBED
.TAG 1709932.0/PQR
.EMAIL drogers02@fs.fed.us



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