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Hazardous Weather Outlook
National Weather Service La Crosse WI
500 AM CDT Mon Aug 21 2017

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-221100-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-
Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-
Adams-Vernon-Crawford-Richland-Grant-
500 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa and southwest into central Wisconsin.

.DAY ONE...Today and Tonight

Scattered storms will move through the area this morning. The main
threat with these storms will be lightning. The stronger storms
may produce small hail and locally heavy rain.

Another round of storms will move through the area from mid
afternoon through early overnight. A few of these storms may
become severe between 3 PM and 10 PM. While the entire area will
have the potential of seeing severe weather, the greatest threat
will be south of Interstate 90. The main severe weather threat
will be damaging winds with a lesser threat for large hail and
isolated tornadoes. In addition to this, there will be periods of
heavy rain.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There will be a chance of storms from Friday night into Sunday. It
is too early discern whether any of these storms will become
severe.

.SPOTTER INFORMATION STATEMENT...

Spotter activation could be needed from mid afternoon into the
evening.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

$$

Boyne

Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
1054 AM CDT Mon Aug 21 2017

WIZ046-047-051-052-056>060-062>072-221600-
Marquette-Green Lake-Fond Du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
1054 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin, and southeast Wisconsin.

.DAY ONE...This Afternoon and Tonight

There is a chance of thunderstorms west of madison late this
afternoon.

Thunderstorms are then expected tonight, moving eastward across
the area. There is a marginal risk for severe storms tonight.
Damaging winds, large hail and heavy rainfall are possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There is a chance of thunderstorms Sunday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed tonight.

$$

Hazardous Weather Outlook
National Weather Service Green Bay WI
448 AM CDT Mon Aug 21 2017

WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-221100-
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-
448 AM CDT Mon Aug 21 2017

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

.DAY ONE...Today and Tonight

Isolated Storms will be possible this morning and early
afternoon, and then become more numerous later this afternoon
into tonight. There is a marginal of risk of severe storms with
damaging winds and large hail this afternoon and evening for
locations south of a line from Tomahawk to Wausaukee. Some of the
storms could also produce torrential rainfall which may result in
some ponding of water on roads.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed today into tonight.

$$

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
430 AM CDT Mon Aug 21 2017

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-220930-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
430 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...TODAY AND TONIGHT

A complex of thunderstorms moving into the outlook area early this
morning will produce locally heavy rainfall, frequent lightning
and wind gusts up to 40 mph. Rainfall amounts of 1 inch or more
in less than an hour may cause some localized flooding.

Isolated thunderstorms are possible through the rest of the day.
Some of these storms could produce hail over 1 inch in diameter,
wind gusts over 60 mph and heavy rainfall.

Tonight, widespread thunderstorms are expected as a cold front
moves through the area. These storms may produce damaging winds
up to 70 mph and heavy rainfall. The Storm Prediction Center has
placed a slight risk for severe storms over most of the outlook
area for today and tonight.

Heavy rainfall tonight may lead to totals as high as 3 inches in a
few locations overnight, which could lead to flash flooding.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon through evening.

$$

Sheets

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
427 AM CDT Mon Aug 21 2017

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
220930-
Winnebago-Boone-McHenry-Lake Illinois-Ogle-Lee-De Kalb-Kane-
DuPage-Cook-La Salle-Kendall-Grundy-Will-Kankakee-Livingston-
Iroquois-Ford-Lake Indiana-Porter-Newton-Jasper-Benton-
427 AM CDT Mon Aug 21 2017 /527 AM EDT Mon Aug 21 2017/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...Today and Tonight.

WEATHER HAZARDS EXPECTED:
  Significant Thunderstorm Risk...with an associated:
      Elevated Flooding Risk.
      Elevated Thunderstorm Wind Damage Risk...up to 60 MPH.
      Limited Hail Risk...up to quarter size.
      Limited Tornado Risk.

DISCUSSION:

An area of storms across Iowa early this morning will slowly
move east southeast through late morning. Some of these
thunderstorms may impact part of the area during mid morning
through early afternoon. This is most favored south of a Dixon
to Joliet to Valparaiso line. A few of the storms could be
severe with mainly a wind and heavy rain threat.

Thunderstorm potential increases again after dark from west to
east across the area. Some of these storms may be severe with
mainly a scattered damaging wind threat. Heavy rainfall is
likely with any storms tonight, and it is possible some
training occurs mainly in north central Illinois. This could
result in flooding.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday...
  Limited Thunderstorm Risk.
  High Swim Risk.
Sunday...
  Limited Thunderstorm Risk.

DISCUSSION:

Gusty northwest to north winds Tuesday afternoon and night will
result in a heightened risk of rip current for the northwest
Indiana shores.

.SPOTTER INFORMATION STATEMENT...

Spotters may be needed today and tonight.

GENERAL STORM MOTION OF THE DAY:

Moving to the east at 20 mph through this evening, and moving to
the east at 35 mph overnight.

&&

$$

Hazardous Weather Outlook
National Weather Service Duluth MN
412 AM CDT Mon Aug 21 2017

MNZ034-036>038-WIZ001>004-006>009-221030-
Crow Wing-South Aitkin-Carlton/South St. Louis-Pine-Douglas-
Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price-
412 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of northeast
Minnesota and northwest Wisconsin.

.DAY ONE...Today and Tonight

Thunderstorms are possible this afternoon and tonight south of a
line from south of the Brainerd Lakes to Wrenshall to Bayfield.
Occasional lightning is expected. Brief downpours and gusty winds
may accompany some of the stronger storms.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There are a few chances of isolated to scattered thunderstorms
this week into next weekend. It is too early to characterize the
risk of severe weather, but all storms will be capable of
occasional cloud-to-ground lightning.

.SPOTTER INFORMATION STATEMENT...

Skywarn Spotter activation is not anticipated today or tonight.

$$

Hazardous Weather Outlook
National Weather Service Des Moines IA
403 AM CDT Mon Aug 21 2017

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-220915-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-Sac-Calhoun-
Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-Carroll-Greene-
Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-Polk-Jasper-
Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-Adams-Union-
Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-Wayne-
Appanoose-Davis-
403 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Periods of thunderstorms will occur today and tonight. There is a
marginal risk for hail and strong wind with the storms this
morning, along with heavy rainfall that could lead to localized
flooding.

There is a slight risk for severe storms late this afternoon and
tonight. All modes of severe weather is possible along with heavy
rainfall which could lead to localized flooding. Very large hail
is possible across much of central Iowa especially north of
Interstate 80 and west of Interstate 35. Damaging wind and a few
tornadoes are possible across all of central Iowa.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and evening.

$$

FAB

Hazardous Weather Outlook
National Weather Service Twin Cities/Chanhassen MN
359 AM CDT Mon Aug 21 2017

MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028-
220900-
Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns-
Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa-
Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington-
Yellow Medicine-Renville-McLeod-Sibley-Carver-Scott-Dakota-
Redwood-Brown-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth-
Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-Rusk-
St. Croix-Pierce-Dunn-Pepin-Eau Claire-
359 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of central and
southern Minnesota...and west central Wisconsin.

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected today into this evening across
central and south central Minnesota and west central Wisconsin.
A few of these storms could produce severe weather, primarily
over southern Minnesota. Damaging winds, large hail and heavy
rainfall are the primary threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Thunderstorms are expected periodically from Friday night through
Sunday. Although predictability regarding timing and location is
low at this time, severe weather appears possible over the
weekend.

.SPOTTER INFORMATION STATEMENT...

SKYWARN spotter activation will may be needed over southern
Minnesota today into this evening.

$$

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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