931 FXUS65 KPIH 140442 AFDPIHArea Forecast Discussion National Weather Service Pocatello ID 1042 PM MDT Mon Oct 13 2025
.KEY MESSAGES...
- Showers will return and gradually increase through Tuesday
- Colder temperatures will come back with better chance of rain and snow midweek
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.SHORT TERM /THROUGH TUESDAY NIGHT/... Issued at 106 PM MDT Mon Oct 13 2025
A few showers are expected this evening across the central mountains before we see a rapid increase in development overnight. Multiple bands of showers with a few thunderstorms are likely Tuesday into Tuesday night. At that point, we may see some enhancement from the Wood River Valley up through Island Park due to decent south to southeast flow across our part of the state. Any accumulating snow should remain above 7000ft, although we may need to watch where colder air stays in valley locations to see if we end up with at least rain mixing with snow...even if no accumulation takes place. Right now, this pattern isn`t conducive to seeing any surprise pockets of freezing rain where it stays colder overnight. Highs Tuesday should remain in the mid 50s to mid 60s in those lower valleys. We could see if eek out into the upper 60s for areas favored with southerly downslope conditions.
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.LONG TERM /WEDNESDAY THROUGH MONDAY/... Issued at 106 PM MDT Mon Oct 13 2025
Wednesday begins with a closed upper low in place across central Nevada with broad upper troughing in place across eastern Idaho. This will set the stage for a few unsettled days on Wednesday and Thursday with widespread precipitation expected throughout the area on Wednesday. Temperatures will be well below normal, by 10 to 15 degrees, throughout eastern Idaho with highs only in the 40s to lower 50s. Snow levels will be running around 7000-7500 feet during this period so expect some accumulations across the higher terrain of the central mountains and eastern highlands where some Winter Weather Advisories may be needed above the aforementioned elevations for accumulations. Stay tuned. Thursday looks like the coldest day with the low nearly centered near the Bear Lake region with areas near the Wyoming border perhaps staying in the 30s to lower 40s for highs, with 40s and low 50s elsewhere. Precip will slowly taper off from west to east throughout the day as the low starts to move east of the area over the course of the day.
Ridging looks to quickly build over the area on Friday and continuing into the weekend which should allow temps to warm up a few degrees each day returning closer to seasonal norms by Sunday. Precip chances look limited to the higher terrain during this period although another deep upper trough appears poised to approach the region on Monday. As such, expect clouds to be on the increase during the afternoon hours Sunday and into the overnight hours Monday morning as another system looks to bring much cooler temperatures along with rain/snow chances for the early part of next week.
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.AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/... Issued at 1042 PM MDT Mon Oct 13 2025
VFR conditions are expected to continue, for the most part, until Tuesday early evening when widespread showers and vicinity thunderstorms are expected for all TAF sites as an upper level low moves over the area. Prior to the low moving into our area from the south expect southerly winds with gusts of around 20 mph by late tomorrow morning/early afternoon. Vicinity showers are possible overnight into tomorrow afternoon as well with light moisture moving into the area ahead of the next system. Also thunderstorms are possible for KSUN late tomorrow morning into the early afternoon. The HREF model shows a brief break in the thunderstorm chances tomorrow mid afternoon until the early evening when the main system hits our area. Expect widespread MVFR/IFR conditions Tuesday evening through Wednesday morning.
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.FIRE WEATHER... Issued at 304 AM MDT Mon Oct 13 2025
Will see mainly dry conditions today as flow aloft turns southerly with significant warming with high temperatures 10 to 15 degrees warmer compared to Sunday. Rain showers will return tonight with more significant precipitation on Wednesday and Thursday with snow levels in the 7 to 8 thousand foot range. But will have widespread wetting rains once again everywhere and will see significant cooling again Wednesday and Thursday.
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.PIH WATCHES/WARNINGS/ADVISORIES... None.
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SHORT TERM...Keyes LONG TERM...McKaughan AVIATION...TW FIRE WEATHER...01
NWS PIH Office Area Forecast Discussion