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Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Lincoln IL
1132 AM CDT Mon Aug 21 2017

ILZ027>031-036>038-040>055-061-221100-
Cass-Champaign-Christian-De Witt-Douglas-Fulton-Knox-Logan-Macon-
Marshall-Mason-McLean-Menard-Morgan-Moultrie-Peoria-Piatt-
Sangamon-Schuyler-Scott-Shelby-Stark-Tazewell-Vermilion-Woodford-
1132 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of central
Illinois and east central Illinois.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

Scattered thunderstorms will continue through the afternoon,
especially in areas north of I-72. A break in thunderstorm
activity is expected, then another period of thunderstorms is
expected overnight. There is a small risk of severe thunderstorms
this afternoon, with strong winds and hail the main threats.

Heat index values will reach 92 to 98 degrees this afternoon.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

Scattered thunderstorms will remain possible through Tuesday
afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon.

$$

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 Milwaukee/Sullivan WI
1054 AM CDT Mon Aug 21 2017

LMZ643>646-221600-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
1054 AM CDT Mon Aug 21 2017

This Hazardous Weather Outlook is for portions of Lake Michigan.

.DAY ONE...This Afternoon and Tonight

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

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Northwest winds may approach Small Craft Advisory levels late
tonight into Tuesday night.

There is a slight chance of thunderstorms Sunday afternoon.

$$
Hentz

www.weather.gov/mkx

Hazardous Weather Outlook
National Weather Service Northern Indiana
902 AM EDT Mon Aug 21 2017

INZ004>009-012>018-020-022>027-032>034-MIZ078>081-OHZ001-002-004-005-
015-016-024-025-221000-
St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-Pulaski-
Marshall-Fulton IN-Kosciusko-Whitley-Allen IN-White-Cass IN-Miami-
Wabash-Huntington-Wells-Adams-Grant-Blackford-Jay-Cass MI-
St. Joseph MI-Branch-Hillsdale-Williams-Fulton OH-Defiance-Henry-
Paulding-Putnam-Van Wert-Allen OH-
902 AM EDT Mon Aug 21 2017 /802 AM CDT Mon Aug 21 2017/

This hazardous weather outlook is for portions of southwest
Michigan...northern Indiana and northwest Ohio.

.DAY ONE...Today and Tonight

No hazardous weather is expected.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Thunderstorms will be possible Tuesday mainly along and southeast of
Interstate 69. An isolated strong storm is possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will no be needed.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

$$

Hazardous Weather Outlook
National Weather Service Northern Indiana
902 AM EDT Mon Aug 21 2017

INZ003-MIZ077-221000-
La Porte-Berrien-
902 AM EDT Mon Aug 21 2017 /802 AM CDT Mon Aug 21 2017/

This hazardous weather outlook is for portions of southwest Michigan
and northern Indiana.

.DAY ONE...Today and Tonight

There is a chance for thunderstorms into this evening, with
thunderstorms becoming likely late tonight. No severe weather is
expected. However isolated locally heavy rainfall is possible late
tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

There is a chance of thunderstorms mainly Tuesday morning. Severe
weather is not expected.

Dangerous swimming conditions due to high waves and rip currents are
possible at Lake Michigan beaches Tuesday and Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.


&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

$$

Hazardous Weather Outlook
National Weather Service Northern Indiana
902 AM EDT Mon Aug 21 2017

LMZ043-046-221000-
New Buffalo MI to St Joseph MI-Michigan City IN to New Buffalo MI-
902 AM EDT Mon Aug 21 2017

This hazardous weather outlook is for portions of The Nearshore
Waters of Southeastern Lake Michigan.

.DAY ONE...Today and Tonight

There is a chance of thunderstorms this evening with thunderstorms
becoming likely late tonight. Wind gusts of 35 knots will be
possible along with locally higher waves.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Hazardous wind and wave conditions for small craft are possible
Tuesday through Wednesday.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

$$

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

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-220930-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Seul Choix Point to Rock Island Passage 5 NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and north of a line from Charlevoix MI to South
Fox Island 5 NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5 NM offshore to
Mid Lake-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5 NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5 NM offshore to
Mid Lake-
Lake Michigan from Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5 NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5 NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5 NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor IL to Michigan City IN 5 NM
offshore to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5 NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5 NM offshore to Mid
Lake-
Lake Michigan from St. Joseph to South Haven MI 5 NM offshore to
Mid Lake-
427 AM CDT Mon Aug 21 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.

.DAY ONE...Today and Tonight.

There is a small chance of thunderstorms this afternoon, mainly
across the south. Thunderstorms are likely late this evening
into overnight, some of which may be strong.

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

There is a chance of thunderstorms across the south Tuesday
morning. There is a chance of thunderstorms across the north
Sunday night.

&&

$$

MTF

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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 Chicago/Romeoville IL
427 AM CDT Mon Aug 21 2017

LMZ740>745-220930-
Winthrop Harbor to Wilmette Harbor-
Wilmette Harbor to Northerly Island-
Northerly Island to Calumet Harbor-Calumet Harbor to Gary-
Gary to Burns Harbor-Burns Harbor to Michigan City-
427 AM CDT Mon Aug 21 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.

.DAY ONE...Today and Tonight.

Elevated Thunderstorm Risk, with some storms tonight possibly
strong.

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

Tuesday...
  Limited Thunderstorm Risk.
  Hazardous Conditions for Small Craft are likely.

&&

$$

Hazardous Weather Outlook
National Weather Service Indianapolis IN
513 AM EDT Mon Aug 21 2017

INZ021-028>031-035>049-051>057-060>065-067>072-220915-
Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone-
Tipton-Hamilton-Madison-Delaware-Randolph-Vermillion-Parke-Putnam-
Hendricks-Marion-Hancock-Henry-Vigo-Clay-Owen-Morgan-Johnson-Shelby-
Rush-Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess-
Martin-Lawrence-Jackson-Jennings-
Including the cities of Lafayette, Frankfort, Kokomo,
Crawfordsville, Anderson, Muncie, Indianapolis, Terre Haute,
Shelbyville, Bloomington, Columbus, Vincennes, Bedford, and Seymour
513 AM EDT Mon Aug 21 2017

This hazardous weather outlook is for central Indiana.

.DAY ONE...Today and Tonight.

Outlook: Strong thunderstorms possible.

Hazards: Gusty wind, lightning, heavy rain, small hail.

Timing: Chances slowly increasing from north to south today through
tonight.

Discussion: Warm moist air and upper level disturbances will cause
storms. The current forecast is conditions will be marginally
favorable for severe weather. That could change depending on how
unstable the air gets.

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

Outlook: Thunderstorms likely Tuesday, ending during the evening.
Storms may be strong or severe. They may also produce torrential
rain or frequent lightning.

Dry weather Wednesday through Sunday.

Discussion: A cold front should make Tuesday the stormiest day since
July. Afterward high pressure will bring drier, cooler, weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon or tonight.

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind

$$

HAZARDOUS WEATHER OUTLOOK
National Weather Service Grand Rapids MI
429 AM EDT Mon Aug 21 2017

MIZ037>040-043>046-050>052-056>059-064>067-071>074-220830-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
429 AM EDT Mon Aug 21 2017

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Today and Tonight

There is a small chance of a thunderstorm this afternoon mainly
along and east of U.S.-131. These storms are not expected to
become severe.

Thunderstorms are expected to develop overnight tonight. Some of
the storms could become locally strong to severe. Wind gusts,
large hail, locally heavy rainfall, and cloud to ground lightning
strikes will be the main threats.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Thunderstorms will gradually diminish through the day on Tuesday.
Some of the storms could be locally strong early.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be possible overnight tonight.

$$

HAZARDOUS WEATHER OUTLOOK
National Weather Service Grand Rapids MI
429 AM EDT Mon Aug 21 2017

LMZ844>849-220830-
St Joseph to South Haven MI-South Haven to Holland MI-
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
429 AM EDT Mon Aug 21 2017

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Today and Tonight

Thunderstorms are expected to develop overnight tonight. Some of
the storms could become locally strong to severe. Wind gusts,
large hail, locally heavy rainfall, and cloud to water lightning
strikes will be the main threats.

Winds and waves will increase overnight tonight. Conditions will
deteriorate, with conditions becoming hazardous to boaters and
swimmers late tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

A few thunderstorms will remain possible on Tuesday morning.

Very hazardous conditions can be expected on Tuesday for boaters
and swimmers as waves are expected to build to at least 5 to 7
feet. These conditions could linger into Wednesday before
improving.

$$

NJJ

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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