Weather Alerts For Williams, IA

# HEADLINE -------------------- HEAT ADVISORY IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT SATURDAY # DETAILS -------------------- WHAT Heat index values up to 105 expected. WHERE Grundy, Hamilton, Hardin, Webster, Black Hawk, Calhoun, and Sac Counties. WHEN From 1 PM this afternoon to 7 PM CDT Saturday. IMPACTS Hot temperatures and high humidity may cause heat illnesses. ADDITIONAL DETAILS While heat index values may not reach 105 degrees each day, the combination of the longevity of the heat and little or limited relief during the overnight periods with warm lows have prompted the multi-day Heat Advisory. ISSUED AT Friday, September 4, 2026 at 3:05 AM CDT ISSUED BY National Weather Service Des Moines IA HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. # AREAS AFFECTED -------------------- Black Hawk, Calhoun, Grundy, Hamilton, Hardin, Sac, Webster Including the cities of Odebolt, Pomeroy, Schaller, Lake View, Cedar Falls, Eldora, Grundy Center, Conrad, Webster City, Early, Dike, Waterloo, Wellsburg, Lake City, Fort Dodge, Manson, Wall Lake, Rockwell City, Ackley, Reinbeck, Sac City, and Iowa Falls

Closest strike: 27.87 miles Monitor Storms You are not at immediate risk, but frequently check WeatherBug to see if storms are moving towards you. Be aware that new storms can also form with little notice.

Pollen Index: 10.3 Pollen Level: high Predominant Pollen: Ragweed, Nettle and Chenopods. The amount of pollen in the air for Saturday will not change appreciably and will remain in the very high range. This lack of change in airborne pollen will continue to affect those who suffer from allergies and those who live with the allergy sufferers.