Dense fog, with visibilities of 1/4 mile or less, formed over all of Sheboygan County and northern sections of Ozaukee County during the early morning hours of April 13th. Clearing skies and light southeast winds allowed air temperatures to cool rapidly to the dew point.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MKX wrote it up.
Dense fog, with visibilities of 1/4 mile or less, formed over all of Sheboygan County and northern sections of Ozaukee County during the early morning hours of April 13th. Clearing skies and light southeast winds allowed air temperatures to cool rapidly to the dew point. The light southeast flow off of Lake Michigan added moisture that aided the development of the dense fog.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Milwaukee, WI wrote its last area forecast discussion before the first event at Apr 12, 9:16 PM CST, 2 hours 27 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
2 dense fog. Local standard time, as filed.
The ASOS at the Sheboygan airport (KSBM) reported visibilities of 1/4 mile or less.
Ozaukee County sheriff deputies reported visibilities of 1/4 mile or less across northern portions of Ozaukee County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2012Every state in 2012This day in weather historyWarnings in Wisconsin, April 2012
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 377862, 377863.