Weather Alerts For Waterloo, IA

# HEADLINE -------------------- FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CDT MONDAY # DETAILS -------------------- WHAT Temperatures as low as 33 will result in frost formation. WHERE Portions of northern and northeast Iowa. WHEN From midnight tonight to 8 AM CDT Monday. IMPACTS Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. ISSUED AT Sunday, May 10, 2026 at 11:57 AM CDT ISSUED BY National Weather Service Des Moines IA HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Take steps now to protect tender plants from the cold. # AREAS AFFECTED -------------------- Wright, Black Hawk, Bremer, Butler, Cerro Gordo, Emmet, Franklin, Hancock, Kossuth, Palo Alto, Winnebago, Worth Including the cities of Estherville, Emmetsburg, Northwood, Eagle Grove, Clear Lake, Algona, Waterloo, Aplington, Cedar Falls, Parkersburg, Waverly, Forest City, Allison, Britt, Clarion, Manly, Mason City, Kanawha, Belmond, Greene, Garner, Hampton, Dumont, Clarksville, Lake Mills, and Shell Rock

Pollen Index: 10.5 Pollen Level: high Predominant Pollen: Ash, Birch and Maple. Pollen concentrations for Monday will be at about the same level in the very high range. If you do suffer from allergies, tomorrow should be about as difficult outdoors as it was today.