Weather Alerts For Waterloo, WI

# HEADLINE -------------------- FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CDT MONDAY # DETAILS -------------------- WHAT Temperatures as low as 30 will result in frost formation. WHERE Portions of east central, south central, and southeast Wisconsin. 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 6:48 PM CDT ISSUED BY National Weather Service Milwaukee/Sullivan WI HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Take steps now to protect tender plants from the cold. # AREAS AFFECTED -------------------- Rock, Washington, Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake, Iowa, Jefferson, Lafayette, Marquette, Ozaukee, Sauk, Sheboygan, Walworth, Waukesha Including the cities of Mayville, West Bend, Barneveld, Montello, Oxford, Beaver Dam, Elkhorn, Plymouth, Markesan, Sheboygan Falls, Blanchardville, Portage, Howards Grove, Whitewater, Mineral Point, Sauk City, Fond Du Lac, Lake Geneva, Princeton, Jefferson, Delavan, Endeavor, Baraboo, Prairie Du Sac, Darlington, Menomonee Falls, Janesville, Madison, Lake Wisconsin, Beloit, Dodgeville, New Berlin, Argyle, Neshkoro, East Troy, Muskego, Brookfield, Fort Atkinson, Benton, Reedsburg, Oostburg, Hartford, Lodi, Germantown, Mequon, Belmont, Cedarburg, Columbus, Monroe, Waukesha, Westfield, Waupun, Brodhead, Watertown, Shullsburg, Berlin, and Grafton

Pollen Index: 10.4 Pollen Level: high Predominant Pollen: Maple, Ash and Birch. The pollen levels for Monday will be falling but will remain in the very high range. Since the weather has a major influence on pollen dispersal, this decrease is due in part to rising relative humidity and relatively weaker winds.