textproduct: Pocatello

KEY MESSAGES

- Drastic Temperature Swings: Seasonable temperatures again today before another sharp drop Sunday when temperatures will struggle to reach the mid-40s to lower 50s.

- Breezy Conditions and Lake Wind Impacts: Lake Wind Advisory for the American Falls Reservoir due to sustained west winds up to 25 mph and gusts to 35 mph.

- 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 141 AM MDT Fri May 15 2026

Daytime temperatures today will run within a few degrees of yesterday's temperatures and very close to seasonable norms, with widespread upper-60s across our low elevation areas and 40s and 50s in the higher terrain. Westerly winds are expected to run slightly stronger today with the breeziest conditions being across the Arco Desert and Upper Snake River Plain, where a Wind Advisory is in effect from 10 AM this morning through 9 PM tonight for sustained winds as high as 35 mph and gusts up to around 50 mph. A Lake Wind Advisory is also in effect for American Falls Reservoir during the same timeframe for westerly winds up to 25 mph and gusts to 35 mph, which could make for choppy conditions, especially for small craft.

Otherwise, conditions will remain dry for the next few days as we gradually transition to below normal temperatures with freezing overnight lows. A PacNW trough will arrive Saturday into Sunday, bringing with it much colder temperatures and chances for snow showers for our northern and eastern mountains and highlands. Frost/freeze conditions will become increasingly widespread heading into the weekend and early next week. While locations here and there across the Snake River Plain may begin to see temperatures dip into the mid-30s as early as this morning or tomorrow morning, it's not until Sunday morning that our growing zones will observe widespread freezing overnight lows with hard freeze likely across the Snake River Plain Monday and Tuesday mornings. By Wednesday night/Thursday morning, temperatures begin to remain above freezing as we warm back into above-normal territory during the second half of next week.

AVIATION /12Z TAFS THROUGH 12Z SATURDAY/

Issued at 541 AM MDT Fri May 15 2026

VFR and dry conditions throughout the period. Westerly winds will remain breezy both today and tomorrow, with gusts up to 35 kts at KPIH and KIDA and 20 to 25 kts elsewhere. Cloud cover will increase late this evening as a Pacific trough approaches.

PIH WATCHES/WARNINGS/ADVISORIES

Wind Advisory from 10 AM this morning to 9 PM MDT this evening for IDZ052-053.