Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 191941
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
141 PM MDT Wed Jul 19 2017

.DISCUSSION...Monsoonal moisture will infringe upon the region
beginning tonight as a cold front works into the Pacific
Northwest. Could see a few isolated storms across the southeast
highlands tonight. Better chances across both the eastern and
southern highlands Thursday afternoon as the front approaches
eastern Idaho. The front should pass through the region Thursday
night resulting in dry weather for the weekend. However
temperatures will not cool down much because the air mass behind
the front will have modified significantly. Looks like a healthy
push of monsoonal moisture returns early next week which will
result in the next threat for thunderstorms.

Valle

&&

.AVIATION...Skies will actually be clearer this afternoon/evening
than this morning as some moisture exits. However, some mid- to high
level moisture is moving in from the south tonight and will develop
CIGs just below 500mb/18000 MSL. By Thu morning, some lower level
moisture will have also worked its way into the extreme southeast
corner of the Gem State. Thus some -SHRA at KPIH and KDIJ is
possible in the morning and -TSRA are possible at KPIH and KDIJ for
Thu afternoon. KSUN is expected to stay extremely dry with only a
brief CIG late tonight. Some gusty wind in the afternoon is
possible, but should be the usual west to southwest and aligning
with the valley airdrome runways. Messick

&&

.FIRE WEATHER...Weak trough moving through tomorrow will kick up the
wind in exposed higher elevations, enough so that, if fuels at the
higher elevations were receptive, it would be a critical weather
day. But that is not the case, so now Warnings or Watches have been
issued. Wind will subside by the weekend. The weak trough will bring
up some moisture for the southeast corner of the Caribou-Targhee NF
and surrounding BLM lands. Expect enough instability and moisture
for isolated dry thunderstorms and some light shower activity. It
will boost minimum humidity in this area as well. The cloud cover
should continue into Fri, along with a thunderstorm threat. Humidity
will quickly dry out once sunshine gets back during the weekend.
Showers and thunderstorms return to the area from the southwest at
the beginning of the week, Mon in the southern highlands and central
Idaho mountains, Tue elsewhere. Messick

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$



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