textproduct: Pocatello

KEY MESSAGES

- Wet and cooler (but still slightly above normal) conditions today and Wednesday

- Much cooler than normal temperatures and much wetter than normal conditions late Wednesday into Friday morning. Moderate to heavy snow for high elevations. Light snow possible for valleys. - Warmer and drier conditions this weekend into next week.

DISCUSSION

Issued at 201 AM MDT Tue Mar 31 2026

For the rest of this week, expect cooler temperatures and much wetter conditions. The potential for showers and isolated thunderstorms picks up today as a weaker system moves into the area and continues into Wednesday. Most of the precipitation will fall across the Sawtooths and surrounding ranges, as well as the Eastern Highlands along the Wyoming border with this round today into Wednesday. Look for light snow above 7500-8000ft. Any real potential for thunder will be across the Eastern and Southeast Highlands, and the South Hills/ALbion mountains. However, a couple of storms cannot be ruled out elsewhere. Expect day-time temperatures in the 50s and lower 60s today and Wednesday.

The bigger push of colder air and moderate to heavy valley rain and mostly mountain snow will occur as an upper-level low system moves through the area late Wednesday into early Friday. This upper-level low system is strong enough and has enough cold air with it to MAYBE produce some light snow across lowest elevations during the coldest hours (late Thursday into early Friday morning) during that stretch. That said, any snow that falls below 7000ft won't be sticking around long at all. Expect some continued potential for isolated thunderstorms until the main storm moves into the Plains. Looking at precipitation totals for the entire period, lowest elevations could see 0.10-0.50" through Thursday night. Higher valleys are looking at 0.60-1.0", and the mountains at 1.0-2.0". The probability for over 2.0" of total moisture this week is LOW, but also not zero for the Sawtooths, Bear River Range, and highest elevations around Island Park. Snow accumulations will be minimal below 7000ft, but some decent amounts of snow are possible especially above 8500ft. Again, the caveats here at that this will be over a multi-day period and we are looking showers/storms versus more widespread and steady precipitation at times. Day-time temperatures will be the coldest on Thursday, with highs in the 30s and 40s, even for the lowest elevations.

Models show a drying and warming trend starting late Friday, continuing through next weekend, and into early next week. Look for day-time temperatures in the 50s/60s to return by next Saturday and day-time temperatures in the 60s/low 70s by early next week.

AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/

Issued at 513 AM MDT Tue Mar 31 2026

Main impact today will be a chance for rain showers at all sites. Kept VFR ceiling levels at all TAF sites other than DIJ where have 2 thousand feet after 03Z. With heavier showers on station expect brief MVFR conditions. Have VCSH and -SHRA throughout Tuesday at all sites. Rain will likely come in waves and be intermittent. Have put in a PROB30 line for -TSRA for BYI and SUN late this afternoon. Winds will not be as strong today as yesterday but still expect gusts up to 25 to 30 knots after 18Z at PIH and IDA.

PIH WATCHES/WARNINGS/ADVISORIES

None.