The National Weather Service in Green Bay issued a flood advisory for parts of central and eastern Wisconsin at 10:38 PM CDT on September 14, effective until 1:45 AM CDT. The advisory covers southeastern Portage, Waushara, Calumet, Manitowoc, Winnebago, southern Brown, southwestern Kewaunee, southern Outagamie, and southern Waupaca counties. The NWS reports that urban and small stream flooding is expected due to excessive rainfall, with minor flooding likely in low lying and poor drainage areas.

KEY FACTS

  • The advisory is in effect until 1:45 AM CDT for multiple counties in central and eastern Wisconsin.
  • Between 1 and 1.5 inches of rain had fallen by 10:37 PM CDT, according to Doppler radar and automated rain gauges.
  • Additional rounds of rain are expected overnight, which could worsen flooding conditions.
  • Locations that may experience flooding include Appleton, Oshkosh, Manitowoc, Waupaca, Kewaunee, Wautoma, Menasha, Kaukauna, Little Chute, New London, Kimberly, Chilton, Brillion, Redgranite, Denmark, Valders, Fremont, and Two Creeks.

CONTEXT

The National Weather Service issued the advisory based on radar and gauge observations showing heavy rain from thunderstorms. The agency warns that urban areas and small streams are particularly vulnerable to rapid flooding when rainfall rates are high. Minor flooding is expected in low lying and poorly drained locations. The advisory is a short term notice, and conditions may change as additional rain falls overnight. The NWS advises residents in affected areas to stay informed and be ready to act if conditions worsen.

WHY IT MATTERS

Flooding can disrupt travel, damage property, and pose safety risks, especially in urban areas where drainage systems may be overwhelmed. Even minor flooding can make roads impassable and create hazardous conditions for drivers and pedestrians. The advisory gives residents time to prepare and avoid flood prone areas.

WHAT TO WATCH

  • Whether the advisory is extended or expanded as additional rain falls overnight.
  • Reports of actual flooding or road closures in the affected counties.
  • Any updates from the National Weather Service regarding changing conditions.

SOURCES AND REFERENCES