Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 202020

Area Forecast Discussion
National Weather Service Pocatello ID
220 PM MDT SAT AUG 20 2016


Today`s high pressure ridge will slowly weaken and a brief return
to west to southwest flow on tap for Sunday into Monday. Expect
one more night of cool temperatures with some higher mountain
valleys below freezing. Warm air advection in advance of Monday
afternoon`s cold front will push temperatures back into the 90s
with breezy conditions. Monday there is a slight chance for a
stray thunderstorm late afternoon through the evening but for the
most part expect breezy to windy conditions. Northwest flow to
dominate the middle part of this coming week with potential for
another small weather system to slide by Wednesday night and
Thursday mainly bringing a slight chance of showers along the
Idaho Montana border area. Friday shows a more vigorous system
dropping south and a greater potential for thunderstorms. Timing
and intensity very uncertain at this juncture.  Preston


.AVIATION... Look for clear skies and overall light winds today
with high pressure building back into the area. Expect breezy winds
by tomorrow afternoon ahead of a mostly dry system moving through
late Monday. Wyatt


.FIRE WEATHER...High pressure is continuing to build into the area
today with weak Northwest flow overhead. Expect breezy to moderate
Southwest flow Sunday ahead of stronger system late Monday.
Currently, Sunday winds are gusting near 20 to 22 mph for the
Central Mountains, Arco Desert, and Upper Snake Highlands...
particularly near the Wyoming border. Though relative humidity will
be around 10 to 15 percent along with widespread Haines of 5, have
decided to hold off as winds remain slightly under criteria,
particularly widespread. A red flag may still need to be issued if
models increase winds and become more consistent among each other. A
red flag does look likely for Monday for the Central Mountains and
Upper Snake highlands for gusty winds and low relative humidity. A
fire weather watch has been issued for Monday afternoon into early
evening for the Central mountains and Upper Snake Highlands. Models
have backed off slightly for thunderstorm coverage across our
Southern areas on Monday afternoon into Tuesday morning so have held
off on a fire weather watch for this point. Beyond
Tuesday morning look for cooler weather in mostly Northerly flow
with a chance of showers and thunderstorms mainly over our Northern
areas by late next week. Wyatt


.PIH Watches/Warnings/Advisories...

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