textproduct: Pocatello
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- After a brief relative cooldown through Tuesday, the dry and warming trend returns through the end of the week.
- Inversions may break provided there is sufficient mixing but stagnant conditions will return for the latter half of the week as upper level high pressure ridge moves overhead by Wednesday. Air stagnation advisories have been re-issued with the high pressure return.
SHORT TERM /THROUGH WEDNESDAY NIGHT/
Issued at 119 PM MST Tue Feb 3 2026
No short term impacts as strong upper level high pressure ridge moves overhead Wednesday. No precipitation is expected with light winds tonight through Wednesday night. Lows tonight teens and 20s mountains and 20s to lower 30s valleys. Highs Wednesday Upper 30s and 40s mountains and mid 40s to lower 50s valleys. Lows Wednesday night again teens and 20s mountains and 20s to lower 30s valleys.
LONG TERM /THURSDAY THROUGH TUESDAY/
Issued at 119 PM MST Tue Feb 3 2026
Upper ridge continues to dominate conditions Thursday through Saturday with very mild conditions, light winds and no chance of any precipiation. Highs Thursday through Sunday in the 40s and 50s with some low elevations close to 60 by Friday. Start to get into more of a westerly flow pattern by Sunday and grids start to show some precipitation chances in the central mountains late Sunday. Models very inconsistent especially operational ones Monday and Tuesday but for now have a widespread chance of snow and rain everywhere in southeast idaho both days early next week. Also expect cooling with highs mainly 30s mountains and upper 30s to lower 40s valleys on Monday and Tuesday much closer to seasonal normal. There is a greater than 50 percent chance for some light mountain snow accumulation Monday and Tuesday.
AVIATION /06Z TAFS THROUGH 06Z THURSDAY/
Issued at 936 PM MST Tue Feb 3 2026
High pressure keeps skies with CIG/VSBY unlimited. The trend has been for fewer clouds compared to previous set of TAFs. No risk of BR/FG/Stratus creating impactful conditions. Wind continues light, at times driven by slope- valley interactions.
AIR QUALITY
Issued at 119 PM MST Tue Feb 3 2026
A large high pressure ridge aloft moves overhead Wednesday and air stagnation advisories have been re-issued through the weekend with the air stagnation expected to increase through the next few days.
PIH WATCHES/WARNINGS/ADVISORIES
Air Stagnation Advisory until 11 AM MST Monday for IDZ054-059.
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