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
- Drastic Temperature Swings: Afternoon highs have plummeted 20+ degrees since yesterday, and another sharp drop is expected Sunday as temperatures struggle to reach the mid-40s to lower 50s.
- Breezy Conditions and Lake Wind Impacts: Sustained winds of 1520 mph continue during the day through Saturday, with slightly higher gusts tomorrow potentially requiring a Lake Wind Advisory for the American Falls Reservoir.
- Frost and Freeze Risk: Winter-like conditions return late this weekend, with frost or freeze products likely needed for growing zones Sunday through Tuesday morning.
DISCUSSION
Issued at 145 PM MDT Thu May 14 2026
The contrast in conditions compared to 24 hours ago is notable, with ample sunshine currently across the region. Despite the clearer skies, a much cooler air mass has settled in, dropping temperatures by 20 degrees or more. Breezy west-to-southwest winds of 1520 mph will remain in place through the evening before ramping up again Friday. Winds tomorrow look slightly stronger, which may necessitate a Lake Wind Advisory for the American Falls Reservoir. Overall, Friday will look very similar to today to round out the work week.
A significant shift arrives this weekend as a potent trough digs into the Pacific Northwest. While cloud cover increases Saturday, the bulk of the precipitation should hold off until Sunday or Monday. Sunday will mark the coldest point of the transition, with highs in the mid-40s to lower 50sa "shocking" change for those accustomed to the 90-degree heat seen just yesterday. This system will likely bring light snow to the central mountains and eastern highlands, and while a few flakes could drift into the Snake Plain, significant impacts there are unlikely. Temperatures will stay below seasonal averages until mid-to-late next week as the trough slowly exits the area.
AVIATION /18Z TAFS THROUGH 18Z FRIDAY/
Issued at 1155 AM MDT Thu May 14 2026
VFR conditions continue through the forecast period with clear to mostly clear skies. Gusty winds prevail this afternoon with gusts 25-30kts. Sunset brings a decrease in winds for the overnight, but they begin increasing again mid morning Friday and continue gusty for the afternoon.
PIH WATCHES/WARNINGS/ADVISORIES
None.
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