textproduct: Pocatello

KEY MESSAGES

- Warm weather continues into next week

- Wet and windy conditions likely returning early next week

SHORT TERM /THROUGH TONIGHT/

Issued at 101 AM MST Fri Dec 12 2025

Ridge of high pressure will produce mainly dry weather once again today. Storm track remains just to our north and there's an outside shot that Island Park could see some flurries or sprinkles, but nothing appreciable. Winds look lighter as the ridge axis begins to slide our way. Peak wind gusts today will mainly be in the 15 to 25 mph range. Temperatures look warm again and could potentially approach records. Values on Thursday overachieved the forecast by 4 or 5 degrees which resulted in records at BYI, LLJ and SNT. The forecast ranges from mid and upper 40s for the mountains and highlands to upper 40s to mid 50s for the Snake Plain and eastern Magic Valley. If we were to overachieve by a similar amounts again, sites that could break a record would be LLJ whose record is 52 set in 2014, PIH whose record is 59 set in 2014, and BYI whose record is 62 set in 2014. SNT and IDA records should be safe.

LONG TERM /SATURDAY THROUGH THURSDAY/

Issued at 1200 PM MST Thu Dec 11 2025

High confidence in well above normal temperatures across eastern Idaho this weekend and into the first part of next week with high pressure in control of the weather. Valley highs in the upper 40s to mid 50s are expected with mostly clear skies throughout the weekend. This remains around 20 degrees above normal for mid-December. Even our overnight low temps are within a few degrees of where the daytime highs should be so saying things are mild could be an understatement. The ridge looks to break as we get later into the day on Monday and this is when it looks like the upper flow becomes more zonal allowing for Pacific moisture to return to the region for the middle part of next week. This is when the forecast becomes tricky as cluster analysis shows wildly differing views on the potential upper level pattern. For now, it seems like a shortwave will move north of the area through the brisk upper flow aloft which should produce some precip potential Tuesday into Wednesday. Snow levels will be high initially but lower throughout the day Wednesday but it still looks like any accumulations will be limited to the higher terrain of the eastern highlands and central mountains. The tight pressure gradient should keep conditions breezy across the Snake Plain and Magic Valley Tuesday-Thursday next week. Still some uncertainty though during this period so stay tuned.&&

AVIATION /12Z TAFS THROUGH 12Z SATURDAY/

Issued at 321 AM MST Fri Dec 12 2025

Winds continue to be problematic mainly at IDA. Just can't seem to lose the gusts which we will probably pick back up again at PIH this afternoon. Winds may have trouble weakening again tonight as well. At SUN expect winds to turn upvalley resulting in a tail wind this afternoon. There wasn't much of a shift to the southwest yesterday and so have little faith that will happen today either. Mainly looking at high clouds drifting through today. Although DIJ continues to hold a 7000 ft deck, but guidance shows it busting up by afternoon.

PIH WATCHES/WARNINGS/ADVISORIES

None.