Suppression Forecast
Issued by NWS Boise, ID

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910
FNUS75 KBOI 232131
FWSBOI

Spot Forecast for Weiser River Rx Unit 12...Payette NF
National Weather Service Boise ID
331 PM MDT Tue May 23 2017

Forecast is based on ignition time of 1500 MDT on May 23.
If conditions become unrepresentative...contact the National Weather
Service.

...DRY COLD FRONTAL PASSAGE EARLY WEDNESDAY MORNING...

.DISCUSSION...The upper level ridge that is currently in place over
Idaho will break down overnight, as a dry cold front tracks southeast
across the area. This front is timed to reach the Weiser River Rx
approximately 0500 MDT Wednesday morning. The front will bring
increased cloud cover and a few sprinkles, but no measurable rainfall.
A noticeable wind shift is expected with frontal passage, but wind
direction will become consistently northwest shortly after sunrise.
Please note that this front will usher in a dry air mass and
Wednesday`s RH values will remain low behind the front.

.TONIGHT...

Sky/weather.........Mostly clear.
CWR /0.10 inch/.....0 percent.
LAL.................1.
Min temperature.....45 to 49.
Max humidity........66 to 71 percent.
Wind - eye level....Southwest 5 to 8 mph with gusts to 15 mph through
                    2100 MDT, becoming north 2 to 4 mph after 2100 MDT;
                    but shifting to west-northwest 5 to 8 mph with
                    ridgetop gusts to 15 mph around 0500 MDT Wednesday
                    (with the frontal passage).
Haines Index........3 very low.
Mixing height.......800 ft AGL.
Transport winds.....Southwest around 15 mph.
Ventilation index...120 Poor.

.WEDNESDAY...

Sky/weather.........Sunny.
CWR /0.10 inch/.....0 percent.
LAL.................1.
Max temperature.....58 to 62.
Min humidity........24 to 28 percent.
Wind - eye level....Northwest 7 to 9 mph with ridgetop gusts to 17 mph.
Haines Index........3 very low.
Mixing height.......6500 ft AGL.
Transport winds.....Northwest around 18 mph.
Ventilation index...1170 Excellent.

$$
Forecaster...Thimmesch
Requested by...Patrick Schon
Type of request...PRESCRIBED
.TAG 1709968.0/BOI



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