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FNUS75 KFGZ 192222
FWSFGZ

Spot Forecast for Prescott Basin Ops Drill...USFS
National Weather Service Flagstaff AZ
322 PM MST Thu Apr 19 2018

Forecast is based on ignition time of 1700 MST on April 19.
If conditions become unrepresentative, contact the
National Weather Service in Flagstaff, AZ

...RED FLAG WARNING IN EFFECT UNTIL 8 PM MST THIS EVENING...

.DISCUSSION...Critical fire weather conditions with strong winds
will persist into early this evening as a cold front moves through.
Cooler temperatures and higher humidity will arrive Friday behind the
front, with winds becoming westerly. There will be a slight chance of
rain showers Friday though any amounts will be very light.

.TONIGHT...

Sky/weather.........Mostly clear.
Chance of pcpn......0 percent.
Min temperature.....Around 36.
Max humidity........47 percent.
Wind (20 ft)........Southwest 20 to 25 mph with gusts to 45 mph,
                    decreasing to 10 to 15 mph after 8 PM.
LAL.................1.
Haines Index........3 very low.
Min Vent Rate.......Poor.
Clearing Index......2.
Mixing height.......5000 ft agl early in the evening decreasing to
                    100 ft agl in the late evening and overnight.
Transport winds.....Southwest around 20 mph decreasing to 5 to 10
                    mph in the late evening and early morning, then
                    shifting to the southeast late in the night.

.FRIDAY...

Sky/weather.........Partly cloudy. Slight chance of rain showers
                    through the day.
Chance of pcpn......10 percent.
Max temperature.....Around 60.
Min humidity........20 to 26 percent.
Wind (20 ft)........West winds 10 to 15 mph. Gusts up to 25 mph.
LAL.................1.
Haines Index........3 very low.
Max Vent Rate.......Excellent.
Clearing Index......2065.
Mixing height.......800 ft agl increasing to 9600 ft agl.
Transport winds.....South around 5 mph increasing to west 15 to 20
                    mph in the late morning and early afternoon,
                    then shifting to the northwest around 25 mph
                    late in the afternoon.

.FRIDAY NIGHT...

Sky/weather.........Mostly clear. Slight chance of rain showers in
                    the evening.
Chance of pcpn......20 percent.
Min temperature.....Around 37.
Max humidity........54 percent.
Wind (20 ft)........Northwest winds around 10 mph with gusts up to
                    25 mph in the evening, becoming light.
LAL.................1.
Haines Index........3 very low.
Min Vent Rate.......Poor.
Clearing Index......2.
Mixing height.......6000 ft agl early in the evening decreasing to
                    100 ft agl in the late evening and overnight.
Transport winds.....Northwest around 20 mph decreasing to 5 to 10
                    mph in the late evening and overnight.

.SATURDAY...

Sky/weather.........Sunny.
Chance of pcpn......0 percent.
Max temperature.....Around 73.
Min humidity........14 percent.
Wind (20 ft)........Light winds.
LAL.................1.
Haines Index........3 very low.
Max Vent Rate.......Fair.
Clearing Index......315.
Mixing height.......300 ft agl increasing to 8000 ft agl.
Transport winds.....North 5 to 10 mph.

$$
Forecaster...JOHNDROW
Requested by...Daniel Matthews
Type of request...PRESCRIBED
.TAG 1806977.1/FGZ
.EMAIL dmmatthews@fs.fed.us