textproduct: Pocatello

KEY MESSAGES

- Periods of snow this afternoon and tonight, ending late.

- After a break Wednesday, light snow with occasional periods of rain returns Wednesday night and continues on and off through the weekend.

- Windy to very windy conditions probable Friday afternoon through Saturday night for the Snake River plain.

SHORT TERM /THROUGH WEDNESDAY NIGHT/

Issued at 1240 PM MST Tue Dec 2 2025

An upper level trof will slide through Idaho this evening with cold front pushing south and a north to south moving band of precipitation expected to develop. Generally 1 to 3 inches of snow is the most likely amount in the southern and eastern mountains with locally heavier amounts in the mountains south of Burley. Expecting up to an inch in the Snake River Plain including Idaho Falls, Blackfoot and Pocatello. At those sites near 100 percent chance for over 0.1 inch and around 20 percent chance for more than an inch. Expecting some minor traffic impacts after sunset with the potential for some snow covered roads. It will turn much colder tonight with lows in the teens and 20s with snow ending after midnight. Wednesday will be dry and cool with highs slightly below normal in the 20s to low 30s mountains and low to mid 30s valleys. Light snow showers will return to the eastern mountains late Wednesday night but no impacts expected. Lows Wednesday night again in the teens and 20s.

LONG TERM /THURSDAY THROUGH MONDAY/

Issued at 1240 PM MST Tue Dec 2 2025

The long term forecast period remains an active one. On Friday, our next wave of moisture will be moving into Eastern Idaho and bringing a mix of rain and snow showers with it. Highs on Friday will range from low to mid 30s in the upper Snake River Plain and Eastern Highlands to low to mid 40s in the eastern Magic Valley and lower Snake River Plain, hence the mix of rain and snow showers. There looks to be a short break in the activity on Friday evening before the next wave moves in from the northwest for Saturday before another short break Sunday morning. Afternoon highs continue to be above freezing for many on Saturday, but some of the warmer temperatures also coincide with some drier periods throughout the timeframe. All in all, let's take a look at some preliminary, potential snow amounts for this Friday/Saturday snowfall. Of course, it comes with the caveat that it will chance over the next several days! For now, the NBM is showing about a 10 to 15 percent chance of over an inch of snow in Pocatello and Idaho Falls and about a 10 percent chance of two inches of snow in Rexburg. There's about a 30 to 40 percent chance of at least 4 inches in Stanley and about a 60 percent chance of the same in Driggs. It also shows about a 15 to 20 percent chance of 6 inches of snow in Stanley and Driggs. Looking at some of our passes, there is about a 40 to 50 percent chance of 8 inches of snow for Galena Summit and Pine Creek Pass and a 70 percent chance of 12 inches of snow at Emigration Summit. Again, these numbers and probability WILL change over the next few days, but Friday/Saturday is looking like a solid snowfall for our passes and mountains. Also of note, winds will increase with this wave, too, with gusts of 30 to 40 mph.

AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/

Issued at 1030 AM MST Tue Dec 2 2025

Scattered snow showers will be the main impact today and through early tomorrow morning along with some breezy conditions from time to time today. The first push of snow this morning has already moved through BYI, PIH, and SUN so those three sites should be a bit milder for the next few hours with generally VFR to borderline MVFR CIGs and wind gusts ranging from 15 to 25kts at BYI and PIH. Snow is still moving through IDA and is expected to arrive into DIJ within the next hour or two. We've seen VIS drop to around 1SM at times with this snow, so went with IFR conditions at DIJ for the bulk of this afternoon and early evening. Speaking of this evening, another round of snow is expected from IDA to PIH to BYI as a convergence band sets up right around 00Z at IDA this evening and drops southward through PIH before wrapping up around 06-07Z at BYI. Confidence in impacts at IDA is a bit lower as there is more model agreement on impacts to VIS and CIGs at PIH and BYI back down to IFR conditions. Watching for some BR and low stratus after the snow wraps up, particularly at BYI and PIH. SUN generally stays out of most of this mess thanks to the northwest flow that typically shadows SUN from -SN in this kind of setup.

PIH WATCHES/WARNINGS/ADVISORIES

None.