Area Forecast Discussion
Issued by NWS Riverton, WY

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FXUS65 KRIW 190445
AFDRIW

Area Forecast Discussion
National Weather Service Riverton WY
1045 PM MDT SUN SEP 18 2016

.Short Term...Tonight Through Monday (Issued at 227 PM MDT)

Increasing west flow aloft will continue to bring limited
moisture will bring some light showers to the northern
mountains...and warmer temperatures. across the south windy
conditions will develop by noon Monday. Relative humidity will
become quite low combining with the strong wind gusts and
critically dry fuels producing conditions favorable for fires with
rapid rates of spread.

.Long Term...Monday Night Through Sunday

The flow aloft will continue to increase and slowly shift to the
southwest Tuesday with continued windy areas and low relative
humidity and a few showers across the north as temperatures
continue to warm. Monday night through tuesday night.  As a low
pressure trough in the eastern Pacific moves east towards the west
coast...moisture will increase in the southwest flow with
increasing afternoon and evening showers and isolated
thunderstorms across the western mountains Thursday.  Showers
will become widespread and spread east with much of the area
receiving precipitation Thursday through Friday with significant
cooling. Significant snowfall may develop in the mountains
Thursday night lifting to the higher mountains on Friday.
Precipitation is expected to decrease on Saturday as the Pacific
trough moves east of the area and cold northwest flow spreads over
the area. Clearing will occur Saturday night with cold
temperatures as high pressure builds in from the west. Sunday
looks dry with slow warming.

&&

.Aviation.../06Z Issuance/

VFR conditions will occur through Monday night. Isolated showers
over the north will end by 12z. LLWS will be an issue for many
terminal sites through 18z. A gusty wind will occur at most terminal
sites Monday afternoon. The wind will decrease between 01z and 02z
at the terminal sites.

&&

.Fire Weather...

...Fire Weather Watch for low relative humidity and strong wind
gusts noon to 8 pm mdt Monday zones 277 279 and 289...

Increasing west flow aloft will continue to bring limited
moisture will bring some light showers to the northern
mountains...and warmer temperatures. across the south windy
conditions will develop by noon Monday. Relative humidity will
become quite low combining with the strong wind gusts and
critically dry fuels producing conditions favorable for fires with
rapid rates of spread.

&&

.RIW Watches/Warnings/Advisories...

Fire Weather Watch from Monday afternoon through Monday evening
for WYZ277-279-289.

&&

$$

SHORT TERM...C.Baker
LONG TERM...C.Baker
AVIATION...AR
FIRE WEATHER...C.Baker



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