Weather Alerts For Port Byron, IL

# HEADLINE -------------------- FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM CDT SATURDAY # DETAILS -------------------- WHAT Temperatures as low as the lower to middle 30s will result in frost formation. WHERE Portions of northwest Illinois, east central, northeast, and southeast Iowa, and northeast Missouri. WHEN From 1 AM to 8 AM CDT Saturday. IMPACTS Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. ISSUED AT Friday, May 1, 2026 at 10:12 AM CDT ISSUED BY National Weather Service Quad Cities IA IL HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Take steps now to protect tender plants from the cold. # AREAS AFFECTED -------------------- Cedar, Henry IA, Benton, Buchanan, Carroll, Clinton, Delaware, Dubuque, Iowa, Jackson, Jefferson, Jo Daviess, Johnson, Jones, Keokuk, Linn, Louisa, Muscatine, Rock Island, Scotland, Scott, Stephenson, Van Buren, Washington, Whiteside Including the cities of Marengo, Sterling, Galena, Sigourney, Fairfield, Vinton, Muscatine, Moline, Cedar Rapids, Mount Pleasant, Iowa City, Tipton, Independence, Dubuque, Bettendorf, Memphis, Rock Island, Keosauqua, Anamosa, Manchester, Davenport, Freeport, Washington, Clinton, Mount Carroll, Maquoketa, and Wapello

Pollen Index: 10.1 Pollen Level: high Predominant Pollen: Maple, Birch and Oak. Based on past pollen counts and expected weather conditions, pollen levels for Saturday will be falling but will remain in the high range. This relief in pollen levels is caused in part by rising humidity, weak winds and expected precipitation in the morning and evening which tends to wash pollen out of the air.