Weather Alerts For American Falls, ID

URGENT - WEATHER MESSAGE National Weather Service Pocatello ID 616 PM MST Sun Jan 18 2026 Lower Snake River Plain- Including the cities of Pocatello, Fort Hall, Blackfoot, American Falls, and Shelley 616 PM MST Sun Jan 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON MST MONDAY... ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON MST TUESDAY... * WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory, poor air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Lower Snake River Plain. * WHEN...For the Dense Fog Advisory, until noon MST Monday. For the Air Stagnation Advisory, until noon MST Tuesday. * IMPACTS...Periods of air stagnation can lead to the buildup of pollutants near the surface. Low visibility could make driving conditions hazardous. Idaho Transportation Department weather stations along Interstates 84 and 86 indicate visibility does fall to as little as 500 feet, making normal high way speeds dangerous. * ADDITIONAL DETAILS...The fog has moved into the American Falls area already, and should spread eastward to the Pocatello area during the evening tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. &&

URGENT - WEATHER MESSAGE National Weather Service Pocatello ID 616 PM MST Sun Jan 18 2026 Lower Snake River Plain- Including the cities of Pocatello, Fort Hall, Blackfoot, American Falls, and Shelley 616 PM MST Sun Jan 18 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL NOON MST MONDAY... ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON MST TUESDAY... * WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory, poor air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Lower Snake River Plain. * WHEN...For the Dense Fog Advisory, until noon MST Monday. For the Air Stagnation Advisory, until noon MST Tuesday. * IMPACTS...Periods of air stagnation can lead to the buildup of pollutants near the surface. Low visibility could make driving conditions hazardous. Idaho Transportation Department weather stations along Interstates 84 and 86 indicate visibility does fall to as little as 500 feet, making normal high way speeds dangerous. * ADDITIONAL DETAILS...The fog has moved into the American Falls area already, and should spread eastward to the Pocatello area during the evening tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. &&