textproduct: Pocatello

KEY MESSAGES

- Lake Wind Advisory for the American Falls Reservoir this afternoon and evening due to breezy to windy conditions.

- Weak trough moving through eastern Idaho today brings in cooler air for Saturday, then gradual warming through Tuesday.

- Second trough on Tuesday night/Wednesday cools temperatures again.

DISCUSSION

Issued at 201 AM MDT Fri Jun 12 2026

Upper level low over western Canada will swing a weak trough through eastern Idaho today. This will increase wind enough to create some blowing dust and rough waters on the American Falls Reservoir. So a Lake Wind Advisory for the reservoir was issued for today. There is a wind shift that starts tonight to the northeast, and the wind increases to the point that a Lake Wind Advisory will be needed again on Sat and Sun, because of northeast wind exceeding 8KT. Otherwise wind is staying below warning and advisory thresholds.

This trough is so dry that few clouds will move through the region. The only area expecting to see a risk of showers, and it is still very low, is the northeast corner of Fremont County in the extreme northeast portion on Sat and Sat night. Other days and locations are expected to be dry.

Temperatures will cool down thanks to the northerly wind expected during the day Sat, then a gradual warming through Tue, with low 90s possible in the eastern Magic Valley and Snake River plain by then. Yet another dry trough and surface cold front brings high temperatures down again for Wed and Thu, but still staying above normal.

AVIATION /06Z TAFS THROUGH 06Z SATURDAY/

Issued at 1001 PM MDT Thu Jun 11 2026

Clear skies with light winds are likely through the night. Will probably see some gusts up towards 20kts in the afternoon at most taf sites tomorrow afternoon.

FIRE WEATHER

Issued at 201 PM MDT Fri Jun 12 2026

Dry cold front moving through during the day will bring gusty windy and continued low humidity. If the fuel conditions were more critical, the eastern Magic Valley, Zone 425, would be under critical fire weather conditions. The southern Sawtooth NF, Zone 427 ahs some limited areas for two hours reaching critical fire weather conditions, so the borderline conditions that are slightly below thresholds for time and coverage means no Red Flag Warning for today/tonight.

Humidity will continue low, with lower elevations hovering around the 15 percent critical threshold in the southwest quadrant and valleys in the Salmon-Challis NF. With limited risk of showers and even cloudiness, minimum humidity gets into single digit range by Wed and Thu. With a trough moving through Tue Night/Wed, Red Flag conditions appear to be possible at that time.

PIH WATCHES/WARNINGS/ADVISORIES

None.