Suppression Forecast
Issued by NWS Great Falls, MT

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9
000
FNUS75 KTFX 212338
FWSTFX

Spot Forecast for Jimtown Harvest 4 RX...US Forest Service
National Weather Service Great Falls MT
538 PM MDT Sat Apr 21 2018

Forecast is based on ignition time of 1100 MDT on April 22.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Partly cloudy skies and light winds are expected Sunday as the next
disturbance approaches from the Pacific NW. Minimum RH of 25% is
expected Sunday afternoon. Mostly cloudy skies and a rain/snow mix
are then expected Sunday night into Monday as the disturbance moves
through. Winds will likely remain light.

.SUNDAY...

Sky/weather.........Partly cloudy.
CWR.................0 percent.
LAL.................1.
Temperature.........49 at ignition, then a max of 59 in the afternoon.
RH..................53 percent at ignition then a min of 25 percent
                    in the afternoon.
Wind (20 ft)........
 Slope/valley.......Southwest winds at 5-10 mph in the morning, then
                    west 5-10 mph in the afternoon, becoming northwest
                    after 3 PM.
Mixing height.......500 ft AGL in the morning, including ignition
                    time. Then increasing to 5000 ft AGL in the
                    afternoon.
Transport winds.....West-southwest 5-10 mph in the morning, becoming
                    northwest in the afternoon.
Haines Index........2 (very low), including at ignition time.

.SUNDAY NIGHT...

Sky/weather.........Mostly cloudy. Chance of rain in the evening,
                    then rain likely after midnight and changing
                    to snow by daybreak.
CWR.................40 percent.
Snow accumulation...1 inch or less.
LAL.................1.
Temperature.........Min 33.
RH..................Max 81 percent.
Wind (20 ft)........
 Slope/valley.......North winds around 5 mph.
Mixing height.......5000 ft AGL decreasing to 3000 ft AGL after
                    midnight.
Transport winds.....Northwest around 5 mph in the evening, becoming
                    north-northeast around 15 mph after midnight.
Haines Index........2 (very low).

.MONDAY...

Sky/weather.........Mostly cloudy. Snow likely in the early morning,
                    then a rain/snow mix likely by mid and late morning.
                    Thereafter, a chance of rain in the afternoon.
CWR.................40 percent.
Snow accumulation...1 inch or less.
LAL.................1.
Temperature.........Max 49.
RH..................Min 42 percent.
Wind (20 ft)........
 Slope/valley.......North winds around 5-10 mph.
Mixing height.......3000 ft AGL increasing to 5500 ft AGL in the
                    afternoon.
Transport winds.....North-northeast 10-15 mph.
Haines Index........2 (very low).

$$
Forecaster...Jaszka
Requested by...Anthony Emacio
Type of request...PRESCRIBED
.TAG 1807292.0/TFX
.EMAIL aemacio@fs.fed.us



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.