784
FXUS65 KPIH 092312
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
512 PM MDT Sun Aug 9 2026

.KEY MESSAGES...

- Red Flag Warning for the Central Mountains this afternoon due
  to low relative humidity and breezy winds. Red Flag Warning
  likely Monday as well.

- Very small chance for an isolated (virga) shower or storm this
  afternoon, mainly in the South Hills, very similar to
  yesterday.

- Wildfire smoke will continue to impact the area on and off for
  the next few days. Expect decreased air quality at times with
  an air quality advisory remaining in effect for Custer County.

&&

.DISCUSSION...
Issued at 156 PM MDT Sun Aug 9 2026

Short term impacts will again be some air quality issues with
smoke persisting throughout all of southeast Idaho to some
extent. Will remain very hot through Tuesday with low elevation
highs remaining in the 90s but think triple digit highs are done
for now. Will have some convective activity but very isolated
this afternoon and evening and Monday mainly in the southern
mountains. Afternoons both today and Monday will be breezy with
widespread 20 to 30 mph gusts especially on Monday afternoon.
Other issue will be a pattern change expected Wednesday through
next weekend with wetter and cooler conditions expected. Have
much higher chance of showers and thunderstorms Thursday through
Sunday. High temperatures are expected to be well below normal
as well mid week through next weekend for a change as well.
Mainly 70s and 80s with some days in the 60s mountains.

&&

.AVIATION /00Z TAFS THROUGH 00Z TUESDAY/...
Issued at 455 PM MDT Sun Aug 9 2026
Kept smoke visibilities at 6 miles or above through Monday. Main
impact other than occasional smoke visibility restrictions will
be increase in winds Monday afternoon after 18Z. Expect 25 knot
gusts at PIH, IDA and DIJ and 20 knots at SUN.

&&

.FIRE WEATHER...
Issued at 106 PM MDT Sun Aug 9 2026

Elevated fire weather conditions will persist through the first part
of this week due to the combination of critical minimum RH values
and gusty winds. Winds continue to be marginal across much of the
region with higher confidence in winds reaching critical thresholds
tomorrow with gusts to 25 to 30 mph across Fire Weather Zones 410,
425, 475, and 476. A RED FLAG WARNING will be issued for the
aforementioned Fire Weather Zones upon the expiration of today`s RFW
for Zones 475 and 476. We anticipate more isolated pockets of Red
Flag conditions to materialize elsewhere, as well.

A deepening trough along the Pacific coast will continue to
gradually flatten the ridge of high pressure over Idaho, resulting
in a gradual cool-down through late this week. Daytime highs will
return to around normal by the middle of this week, turning cooler
than normal late week. Monsoon moisture will return for the latter
half of this week, raising humidities above critical threshold
beginning Wednesday.

&&

.AIR QUALITY...
Issued at 209 AM MDT Sat Aug 8 2026

An Air Quality Advisory remains in effect for Custer County through
Monday afternoon due to air quality expected to remain in the
"moderate" to "unhealthy for sensitive groups" categories.

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Air Quality Alert until 3 PM MDT Monday for IDZ068>074.
Red Flag Warning until 9 PM MDT this evening for IDZ475-476.

&&

$$

DISCUSSION...GK
AVIATION...GK
FIRE WEATHER...Cropp
AIR QUALITY...AMM