weather.gov     
National Weather Service

Watches, Warnings & Advisories
NWS Homepage

Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
459 AM CDT Sat Aug 17 2019

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-181000-
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-
459 AM CDT Sat Aug 17 2019

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 few thunderstorms are possible this morning, mainly south of
Interstate 80. The primary threats with any activity this
morning will be small hail and lightning.

Thunderstorms with more widespread coverage are expected to
redevelop this evening and persist overnight. A few of the
storms could be severe with large hail, damaging winds, and
tornadoes all threats. In addition, localized flash flooding
from heavy rain will be possible.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

On Sunday afternoon and evening, there is a marginal risk for
severe storms along and to the southeast of a line from Freeport,
Illinois to Williamsburg, Iowa. The main threats are strong winds
and lightning. The coverage of storms should be low.

Peak heat indices on Monday and Tuesday may reach the upper 90s to
around 100 degrees in the counties south of Interstate 80.

There are chances for thunderstorms Tuesday and Tuesday night. It
is too early to determine the risk for severe weather.

.SPOTTER INFORMATION STATEMENT...

Spotter and amateur radio network activation may be needed tonight.

$$

McClure/Uttech

Hazardous Weather Outlook
National Weather Service Lincoln IL
519 AM CDT Sat Aug 17 2019

ILZ027>031-036>038-040>042-047-048-181030-
Cass-Fulton-Knox-Logan-Marshall-Mason-McLean-Menard-Peoria-
Schuyler-Stark-Tazewell-Woodford-
519 AM CDT Sat Aug 17 2019

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

.DAY ONE...TODAY AND TONIGHT...

Scattered thunderstorms are possible this morning. Some of the
storms will contain frequent lightning and locally heavy
downpours. Severe thunderstorms are possible tonight. Damaging
wind gusts are the main threat overnight.


.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

Scattered thunderstorms are possible Sunday through Tuesday.
Strong storms are possible on Sunday, with gusty winds and small
hail.

Hot and humid conditions will set up over the area on Monday and
Tuesday, when afternoon heat indices of 100 to 105 degrees are
expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible tonight.

$$

Hazardous Weather Outlook
National Weather Service Lincoln IL
519 AM CDT Sat Aug 17 2019

ILZ043>046-049>057-061>063-066>068-071>073-181030-
Champaign-Christian-Clark-Clay-Coles-Crawford-Cumberland-De Witt-
Douglas-Edgar-Effingham-Jasper-Lawrence-Macon-Morgan-Moultrie-
Piatt-Richland-Sangamon-Scott-Shelby-Vermilion-
519 AM CDT Sat Aug 17 2019

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

.DAY ONE...TODAY AND TONIGHT...

Scattered thunderstorms are possible this morning, and again
tonight. While widespread severe weather is not expected, some of
the storms could be strong, with gusty winds and small hail.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

Scattered thunderstorms are possible Sunday through Tuesday.
Strong storms are possible on Sunday, with gusty winds and small
hail.

Hot and humid conditions will set up over the area on Monday and
Tuesday, when afternoon heat indices of 100 to 105 degrees are
expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated through tonight.

$$

Hazardous Weather Outlook
National Weather Service Des Moines IA
514 AM CDT Sat Aug 17 2019

IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-
081>086-092>097-181015-
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-
514 AM CDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...Today and tonight

Strong to severe storms are possible late this afternoon and into
the evening hours. The severe threats include large hail,
damaging winds, and even a few tornadoes.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Isolated storms are possible Sunday night into Monday and again on
Tuesday. The severe weather risk is low. Hot and humid conditions
return to the state on Monday and Tuesday where heat index values
look to top 100 degrees.

.SPOTTER INFORMATION STATEMENT...

Spotters are likely to be needed this afternoon and tonight.

$$

KLP

Hazardous Weather Outlook
National Weather Service Saint Louis MO
451 AM CDT Sat Aug 17 2019

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-181000-
Adams IL-Audrain MO-Bond IL-Boone MO-Brown IL-Calhoun IL-Callaway MO-
Clinton IL-Cole MO-Crawford MO-Fayette IL-Franklin MO-Gasconade MO-
Greene IL-Iron MO-Jefferson MO-Jersey IL-Knox MO-Lewis MO-Lincoln MO-
Macoupin IL-Madison IL-Madison MO-Marion IL-Marion MO-Moniteau MO-
Monroe IL-Monroe MO-Montgomery IL-Montgomery MO-Osage MO-Pike IL-
Pike MO-Ralls MO-Randolph IL-Reynolds MO-Saint Charles MO-
Saint Clair IL-Saint Francois MO-Saint Louis City MO-Saint Louis MO-
Sainte Genevieve MO-Shelby MO-Warren MO-Washington IL-Washington MO-
451 AM CDT Sat Aug 17 2019

This Hazardous Weather Outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Today and tonight.

Thunderstorms are likely through this morning. A few of these storms
could be severe with damaging winds and large hail. Heavy rainfall
is also possible, and a Flash Flood Watch remains in effect where
the heaviest rainfall is expected.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There is a chance of thunderstorms across parts of the area each day
Sunday through Friday. A few of these storms could be strong to
severe on Sunday.

Heat index readings will climb to around 105 degrees across parts of
the area on Monday and Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed through this morning.

$$

Britt

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
447 AM CDT Sat Aug 17 2019

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
181000-
Winnebago-Boone-McHenry-Lake-Ogle-Lee-De Kalb-Kane-DuPage-Cook-
La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford-
Porter-Newton-Jasper-Benton-
447 AM CDT Sat Aug 17 2019 /547 AM EDT Sat Aug 17 2019/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Significant Thunderstorm Risk...with an associated:
     Limited Tornado risk.
     Elevated hail risk...up to half dollar size.
     Elevated damaging wind risk...up to 60 mph.
  Elevated Flooding Risk.

DISCUSSION...

Scattered thunderstorms are likely early this morning along and
south of I-80 in northern Illinois and northwest Indiana. A few
of these storms will be capable of producing large hail and
damaging winds. More widespread thunderstorms are expected through
mid to late morning for locations along and south of I-88 in
northern Illinois and northwest Indiana. These storms will also be
capable of producing large hail and damaging winds. A lull in the
activity is expected by early this afternoon, though a few storms
could develop. If any storms were to develop this afternoon, an
additional severe threat is expected.

Expect a complex of storms to develop across IA this evening, and
then track east into northern IL and northwest IN later in the
night into early Sunday morning. A large hail and damaging wind
threat will accompany these storms, along with the potential for
heavy downpours and localized flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Sunday...
  Limited Severe Thunderstorm Risk.
  Limited Excessive Heat Risk.
Monday and Tuesday...
  Limited Thunderstorm Risk.
  Limited Excessive Heat Risk.
Wednesday...
  Limited Thunderstorm Risk.
Friday...
  Limited Thunderstorm Risk.

DISCUSSION:

Thunderstorms may still be in place early Sunday morning, with a
few strong to severe storms still possible. Additional
thunderstorms are expected Sunday night across much of the area,
with a threat of strong to severe storms also possible during this
time. Active pattern will continue early next week, with periodic
thunderstorm chances expected through mid week.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed this morning, and again tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east northeast at 35 to 45 mph.

$$

Hazardous Weather Outlook
National Weather Service La Crosse WI
421 AM CDT Sat Aug 17 2019

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-180930-
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-
421 AM CDT Sat Aug 17 2019

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

.DAY ONE...Today and Tonight

Showers and thunderstorms will spread across the area after
midnight tonight. A few strong to severe storms will be possible,
mainly south of Interstate 90, with isolated large hail and
damaging winds as the main threats. Locally heavy rainfall will
also be possible.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Scattered thunderstorms will continue Sunday morning, diminishing
through the afternoon. These storms are not expected to be
severe, but they may still produce locally heavy rainfall.

Additional thunderstorm chances will return late Monday night
into Tuesday, but it is too early to discern any potential severe
weather threat.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected tonight, but any reports of
severe weather or heavy rainfall would be appreciated.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

$$

Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
351 AM CDT Sat Aug 17 2019

WIZ046-047-051-052-056>060-062>072-180900-
Marquette-Green Lake-Fond Du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
351 AM CDT Sat Aug 17 2019

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

.DAY ONE...Today and Tonight

Patchy fog is possible through sunrise, especially across central
and southwestern Wisconsin. Fog may be dense in some areas.

There are chances for thunderstorms this afternoon in far southern
Wisconsin. Then more widespread chances for thunderstorms are
expected overnight into Sunday morning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

There are chances for thunderstorms Sunday and Sunday night,
followed by off and on chances through Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed late tonight into Sunday
morning.

$$

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
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE