National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FLUS43 KGRB 211927
HWOGRB

Hazardous Weather Outlook
National Weather Service Green Bay WI
227 PM CDT Fri Jul 21 2017

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-221930-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
227 PM CDT Fri Jul 21 2017

This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.

.DAY ONE...Tonight

There is a chance for thunderstorms tonight across mainly central
and east central Wisconsin. As of late afternoon, there is still a
slight risk of severe storms south and west of a line from
Merrill to Oshkosh. Damaging winds and localized flooding will be
the primary threats. Continue to monitor trends as the potential
of severe weather may shift further southwestward.

.DAYS TWO THROUGH SEVEN...Saturday through Friday

There is a slight risk of severe thunderstorms Saturday afternoon
into Saturday evening across north-central Wisconsin. The
expected threats from these storms include damaging winds, brief
heavy rain, and hail.

There is a marginal risk of severe weather on Sunday. Large hail
and gusty winds are the main threats.

There is also a chance of thunderstorms Tuesday afternoon through
Wednesday. It is too early to determine whether any of these
storms may become severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and tonight.

$$

LMZ521-522-541>543-221930-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
227 PM CDT Fri Jul 21 2017

This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.

.DAY ONE...Tonight

There is a chance for thunderstorms tonight. A few storms may
contain gusty winds. Humid air developing over the region could
also result in dense fog on the lake tonight which would pose a
navigation hazard to boaters.

.DAYS TWO THROUGH SEVEN...Saturday through Friday

Thunderstorms are possible at times from Saturday through Sunday.
There is a marginal risk of severe thunderstorms on Saturday
afternoon and Sunday afternoon. Damaging winds and large hail
would be the main threats. Humid air returning to the region could
also result in dense fog on the lake at times through Saturday
night, which would pose a navigation hazard to boaters.

$$

TDH/KLB