273
FXUS65 KPIH 062047
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
147 PM MST Mon Jan 6 2025

.SHORT TERM...Today through Tuesday Night.
Light snow showers will continue on and off for the rest of the
afternoon and evening in eastern Idaho as a weak shortwave makes its
way through the area. Any additional accumulation is expected to
remain light, less than an inch. The exception would be in the
mountains of the South Hills and Southeastern Highlands with totals
closer to an additional 1 to 2 inches of snow. While we will get
some clearing overnight, we will be harder pressed to completely
break out of the low stratus. Breezy north winds gusting around 20
mph should help keep any real widespread fog development at bay.
Some much cooler air is coming in behind this shortwave tonight
and lows will fall into the single digits for much of the Central
Mountains, upper Snake River Plain, and Eastern Highlands by
Tuesday morning. In the lower Snake River Plain and eastern Magic
Valley, lows will fall into the low to mid teens for most. High
pressure building in over the area and this northerly flow will
keep us dry and cooler on Wednesday. Manually lowered highs for
tomorrow just a couple of degrees from what NBM came in with today
to have most of the Snake River Plain in the mid 20s for highs
and near 30 in the eastern Magic Valley. Would not be surprised if
we end up even a few degrees cooler as the latest HREF data shows
a 40 to 60 percent chance of highs less than 25 degrees between
Rexburg and Pocatello tomorrow. AMM

.LONG TERM...Wednesday through Monday.
Ridge of high pressure builds to the west, keeping northerly flow in
place over East Idaho. A weak but mostly dry shortwave passes to the
east Wednesday and Wednesday night, with a few snow showers possible
mainly across the northeast corner. Temperatures will be the biggest
concern, and could be highly impacted by how much low cloud cover
and fog develop and/or remain in place into mid week. Ensembles are
showing quite a bit of spread in daytime high temperatures. Kept
temperatures around the blend mean, but still have an eye toward
lowering if the lower atmosphere can break out of the moisture. The
next system arrives late Friday through Sunday, with the next
round of snow possible. Ridge does look to rebuild for drying
conditions early next week. DMH


&&

.AVIATION...18Z Monday to 18Z Tuesday.
Most of the snowfall has moved south of East Idaho terminals,
though can`t rule out a stray SHSN through the evening. Low
stratus in place for most terminals with exception of KSUN, and do
not see much improvement through tomorrow - expect CIGS to vary
between IFR and MVFR. Occasional LIFR will be possible around
sunrise along with reduced VIS. DMH


&&

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

$$