Weather Alerts For Firth, ID

# HEADLINE -------------------- LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR AMERICAN FALLS RESERVOIR FROST ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING # DETAILS -------------------- WHAT North winds 20 to 30 mph with gusts up to 45 mph for American Falls Reservoir. WHERE Lower Snake River Plain. WHEN Until 9 PM MDT this evening. IMPACTS Strong winds and rough waves on area lakes will create hazardous conditions for small craft. ISSUED AT Monday, May 18, 2026 at 8:35 AM MDT ISSUED BY National Weather Service Pocatello ID HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Boaters on area lakes should use extra caution since strong winds and rough waves can overturn small craft. # AREAS AFFECTED -------------------- Lower Snake River Plain Including the cities of Shelley, Blackfoot, American Falls, Fort Hall, and Pocatello