Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
228 AM CDT Sat Sep 5 2026
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-060730-
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-
228 AM CDT Sat Sep 5 2026
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
Dangerous heat continues through this evening. Peak heat indices
of 100 to 110 degrees are expected.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
Heat and humidity will return on Tuesday and Wednesday as heat
indices reach into the mid 90s to 100 degrees along and south of
Interstate 80.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected today or tonight.
$$
Hazardous Weather Outlook
National Weather Service Lincoln IL
524 AM CDT Sat Sep 5 2026
ILZ027>031-036>038-040>057-061-061100-
Knox-Stark-Peoria-Marshall-Woodford-Fulton-Tazewell-McLean-Schuyler-
Mason-Logan-De Witt-Piatt-Champaign-Vermilion-Cass-Menard-Scott-
Morgan-Sangamon-Christian-Macon-Moultrie-Douglas-Coles-Edgar-Shelby-
524 AM CDT Sat Sep 5 2026
This Hazardous Weather Outlook is for central Illinois, east
central Illinois and west central Illinois.
.DAY ONE...Today and tonight.
The heat index will reach around 105 degrees across much of the area
by midday, although it will begin to edge downward late afternoon
following passage of a cold front.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
After a couple days of more tolerable conditions, the heat and
humidity is expected to return Tuesday and Wednesday.
Scattered thunderstorms are expected Wednesday night and Thursday.
The severe weather threat appears low at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not anticipated through tonight.
$$
Hazardous Weather Outlook
National Weather Service Kansas City/Pleasant Hill MO
0505 AM CDT Sat Sep 05 2026
KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040-
043>046-053-054-061005-
Atchison KS-Miami-Linn KS-Doniphan-Leavenworth-Wyandotte-Johnson KS-
Atchison MO-Nodaway-Worth-Gentry-Harrison-Mercer-Putnam-Schuyler-
Holt-Andrew-De Kalb-Daviess-Grundy-Sullivan-Adair-Buchanan-Clinton-
Caldwell-Livingston-Linn MO-Macon-Platte-Clay-Ray-Carroll-Chariton-
Randolph-Jackson-Lafayette-Saline-Howard-Cass-Johnson MO-Pettis-
Cooper-Bates-Henry-
0505 AM CDT Sat Sep 05 2026
This hazardous weather outlook is for northwest...north central and
west central Missouri...as well as extreme eastern Kansas.
.DAY ONE...Through tonight.
Please go to https://weather.gov/media/eax/DssPacket.pdf for more information on
potential weather hazards.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Please go to https://weather.gov/media/eax/DssPacket.pdf for more information on
potential weather hazards.
.KEY MESSAGES...
- Hazardous / prolonged heat continues through the weekend and into
next week.
- Extreme Heat Warning remains in effect through 8 PM Saturday area
wide and through 8 PM Tuesday for areas along and south of
a line from St. Joseph MO to Boonville MO
- Chances (20 to 35 percent) for thunderstorms Sunday afternoon
and evening, with greatest chances tending to be over northern
Missouri.
$$
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
333 AM CDT Sat Sep 5 2026
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-060845-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
333 AM CDT Sat Sep 5 2026 /433 AM EDT Sat Sep 5 2026/
This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.
.DAY ONE...Today and Tonight.
Weather hazards expected...
Limited Excessive Heat Risk.
DISCUSSION...
High temperatures are forecast in the lower 90s again today near
and south of the Kankakee and Illinois rivers, where afternoon
heat indices between 100 and 105 degrees are expected.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Tuesday Night and Wednesday...
Limited Thunderstorm Risk.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be necessary through tonight.
$$
Hazardous Weather Outlook
National Weather Service Des Moines IA
329 AM CDT Sat Sep 5 2026
IAZ004>007-015>017-023>028-060830-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-Butler-Bremer-
329 AM CDT Sat Sep 5 2026
This Hazardous Weather Outlook is for portions of central Iowa.
.DAY ONE...Today and tonight
Heat and humidity persists today with heat indices around 100
degrees late this afternoon.
.DAYS TWO THROUGH SEVEN...Sunday through Friday
Additional thunderstorm chances are forecast at times from Sunday
into early next week. Any severe weather potential during that
time will be assessed in the coming days.
.SPOTTER INFORMATION STATEMENT...
Storm reports are always appreciated.
&&
NWS Des Moines will discontinue the Hazardous Weather Outlook
product (HWO) on September 30th, 2026. Weather hazards and
outlooks will continue to be provided through the standard
forecast channels, including weather briefing packets, forecast
discussions, weather story graphics, the experimental graphical
hazardous weather outlook, and updated hazard messaging. All
local products and visual tools are accessible directly at
weather.gov/desmoines.
$$
Hazardous Weather Outlook
National Weather Service Des Moines IA
329 AM CDT Sat Sep 5 2026
IAZ033>039-044>050-057>062-070>075-081>086-092>097-060830-
Sac-Calhoun-Webster-Hamilton-Hardin-Grundy-Black Hawk-Crawford-
Carroll-Greene-Boone-Story-Marshall-Tama-Audubon-Guthrie-Dallas-
Polk-Jasper-Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska-
Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur-
Wayne-Appanoose-Davis-
329 AM CDT Sat Sep 5 2026
This Hazardous Weather Outlook is for portions of central Iowa.
.DAY ONE...Today and tonight
A Heat Advisory is in effect for the area. Please refer to the
National Weather Service website at weather.gov/desmoines for
further details.
.DAYS TWO THROUGH SEVEN...Sunday through Friday
Additional thunderstorm chances are forecast at times Sunday into
early next week. Any severe weather potential during that time
will be assessed in the coming days.
.SPOTTER INFORMATION STATEMENT...
Storm reports are always appreciated.
&&
NWS Des Moines will discontinue the Hazardous Weather Outlook
product (HWO) on September 30th, 2026. Weather hazards and
outlooks will continue to be provided through the standard
forecast channels, including weather briefing packets, forecast
discussions, weather story graphics, the experimental graphical
hazardous weather outlook, and updated hazard messaging. All
local products and visual tools are accessible directly at
weather.gov/desmoines.
$$
