textproduct: Pocatello

KEY MESSAGES

- Shifting Pattern Tomorrow: An upper-level trough and a "backdoor" cold front will move into the area, bringing showers and cooler temperatures for Tuesday and Wednesday.

- Breezy Winds & Lake Advisory: Gusty northeast winds are expected tomorrow, which has resulted in the issuance of a Lake Wind Advisory.

- Freeze Potential: Northerly flow will usher in much cooler air, potentially requiring a Freeze Warning for parts of eastern Idaho early Wednesday morning.

- Warming Trend Returns: High pressure will build late this week and into the weekend, returning temperatures to above- normal levels.

DISCUSSION

Issued at 245 PM MDT Mon May 4 2026

A gorgeous spring afternoon is currently in progress across eastern Idaho, with satellite imagery showing mostly clear skies and temperatures warming comfortably into the 60s and 70s. This tranquil weather will begin to shift this evening as showers develop over the higher terrain. High-resolution models indicate these showers will linger through the overnight hours and into Tuesday as an upper-level trough and a backdoor cold front push into the region.

The arrival of this front will lead to a noticeably cooler Tuesday and Wednesday. In addition to the temperature drop, breezy northeast winds will develop tomorrow, prompting the issuance of a Lake Wind Advisory. By Wednesday morning, northerly flow aloft will bring the coldest air of this stretch into the region, and a Freeze Warning may be necessary for portions of eastern Idaho.

Precipitation is expected to taper off for most locations after tomorrow, though a few isolated showers may persist in the eastern highlands. A warming trend will begin mid-week as a high-pressure ridge builds over the Intermountain West. This setup will allow above-normal temperatures to return late in the workweek and persist into early next week, keeping most of the region dry.

AVIATION /18Z TAFS THROUGH 18Z TUESDAY/

Issued at 1228 PM MDT Mon May 4 2026

Have maintained PROB30s for thunderstorms this afternoon at KSUN and KDIJ. VCSH is forecast at KPIH and KIDA this afternoon through the first part of Tuesday, with VCSH at KBYI beginning around 09z tonight. VFR CIGs and VIS are anticipated unless a direct thunderstorm impact leads to degradation. Winds will increase beginning overnight tonight and remain elevated Tuesday as a cold front swings through, with gusts 20 to 25 kts at all sites except for KDIJ.

PIH WATCHES/WARNINGS/ADVISORIES

None.