Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
321 AM CDT Mon Jul 20 2026

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-210830-
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-
321 AM CDT Mon Jul 20 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

Hot and humid conditions are expected today with peak heat index
readings between 95 to 105 degrees. A Heat Advisory has been
issued for portions of the outlook area, west and southwest of the
Quad Cities.

Thunderstorms will be seen today in two rounds; one during the
morning and the second, more widespread round late this afternoon
and into tonight.

The Storm Prediction Center has an enhanced, level 3 out of 5,
risk of severe storms along and north of Interstate 80. South of
Interstate 80, a slight, level 2 out of 5, risk of severe storms
exists.

The morning round of storms will be mainly non-severe, but, an
isolated severe storm with gusty winds cannot be ruled out.

The late afternoon and evening round of storms are expected to be
strong to severe. When this round of storms develops, all modes
of severe weather are possible with supercells, including
tornadoes. As the storms quickly grow upscale into organized
clusters, the main severe risk will transition to damaging winds,
potentially over 75 mph, with brief spin-up tornadoes as a
secondary risk.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is expected this afternoon and evening.

$$

ILZ001-002-007-009-015>018-024>026-034-035-210815-
Jo Daviess-Stephenson-Carroll-Whiteside-Rock Island-Henry IL-Bureau-
Putnam-Mercer-Henderson-Warren-Hancock-McDonough-
Including the cities of Galena, Freeport, Mount Carroll, Sterling,
Moline, Rock Island, Geneseo, Princeton, Hennepin, Aledo, Oquawka,
Monmouth, Carthage, and Macomb
305 AM CDT Mon Jul 20 2026

...AIR QUALITY ALERT IN EFFECT UNTIL MIDNIGHT CDT TONIGHT...

The Illinois Environmental Protection Agency has issued an Areawide
Air Pollution Action Day for today for portions of Illinois. This is
in addition to the ongoing Areawide Air Pollution Action Day issued
yesterday for the same areas.

An Areawide Air Pollution Action Day is declared when weather
conditions are such that widespread ozone and or particulate levels
are forecast to be at OR ABOVE the Unhealthy for Sensitive Groups
(USG) category in all or nearly all Illinois AQI forecast sectors.

Areas both inside and outside of the Action Day coverage area are
likely to see smoke/PM2.5 to a varying degree and duration today and
Monday with smoke likely decreasing from southwest to northeast
through the day Monday. Those with air quality concerns or anyone in
Illinois with outdoor plans are encouraged to check current NowCast
readings or sign up for EnviroFlash alerts on AirNow. gov. Before
going outside, checking the NowCast AQI will help identify periods of
both poor and cleaner air quality regardless of the level of the
daily 24-hour AQI forecast.

AQI Category Guidance

Unhealthy for Sensitive Groups (USG) - Members of sensitive groups
may experience health effects. The general public is less likely to
be affected. Sensitive groups: Make outdoor activities shorter and
less intense. Its OK to be active outdoors, but take more breaks.
Watch for symptoms such as coughing or shortness of breath. People
with asthma: Follow your asthma action plan and keep quick relief
medicine handy. People with heart disease: Symptoms such as
palpitations, shortness of breath, or unusual fatigue may indicate a
serious problem. If you have any of these, contact your health care
provider. Unhealthy - Sensitive groups: Avoid long or intense outdoor
activities. Consider rescheduling or moving activities indoors.
Everyone else: Reduce long or intense activities. Take more breaks
during outdoor activities.

Air quality forecasts and current air quality can be found at
www.airnow.gov

Media Contact... Illinois EPA


$$

Hazard Report Provided By forecast.weather.gov