Alert archive / Illinois / Severe Thunderstorm Warnings in 2025

Severe Thunderstorm Warning 36, NWS Quad Cities, IA

April 20, 2025Henry County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 20, 2025, 8:31 PM CDT for Henry County, Illinois. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 20, 2025, 8:31 PM CDT (01:31 UTC)
Expired: Apr 20, 2025, 9:30 PM CDT
In force: 59 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Henry County, IL

The radar

The Quad Cities radar (KDVN), 47 km from the middle of the area, began a volume at 01:30 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 20, 3:41 PM CDT	Tornado Watch	SPC	7 hr

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Quad Cities, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 6:36 PM CDT, 1 hour 55 minutes earlier.

Area forecast discussion, Apr 20, 6:36 PM CDT, 1 hour 55 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Apr 20, 2:07 PM CDT, 6 hours 24 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
207 PM CDT Sun Apr 20 2025

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-211915-
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-
207 PM CDT Sun Apr 20 2025

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...THIS AFTERNOON AND TONIGHT

A strong storm system is expected to bring widespread rain and a
few thunderstorms to the outlook area today into this evening.
Heavy rainfall and a few severe storms are possible, with the main
threats damaging wind and large hail, especially this evening. A
few tornadoes are also possible mainly south of Highway 34.

The Storm Prediction Center has an Enhanced Risk (Level 3 of 5)
across portions of northeast Missouri, a Slight Risk extending to
the north just south of the Interstate 80 corridor, and a Marginal
Risk up to the Highway 30 corridor.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

GENERAL STORM MOTION OF THE DAY:

Toward the northeast at 40 to 45 mph.

Haase/Uttech

In the hours before

Special weather statement, Apr 20, 4:18 PM CDT, 4 hours 13 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 7:14 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	61 min
Apr 20, 7:25 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Des Moines, Johnson, Jones, Louisa, Muscatine and 1 more	65 min
Apr 20, 7:33 PM CDT	Tornado Warning	DVN	Des Moines, Louisa	42 min
Apr 20, 7:49 PM CDT	Flash Flood Warning	DVN	Benton, Johnson, Linn	3 hr
Apr 20, 8:00 PM CDT	Tornado Warning	DVN	Muscatine, Scott	32 min
Apr 20, 8:08 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Muscatine, Scott	67 min
Apr 20, 7:00 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, McDonough	60 min
Apr 20, 7:33 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough, Warren	42 min
Apr 20, 7:37 PM CDT	Tornado Warning	DVN	Hancock, Henderson, McDonough, Warren	23 min
Apr 20, 7:55 PM CDT	Severe Thunderstorm Warning	DVN	McDonough, Mercer, Warren	65 min
Apr 20, 7:57 PM CDT	Tornado Warning	DVN	Warren	23 min
Apr 20, 8:36 PM CDT	Tornado Warning	DVN	Henry, Mercer	39 min
Apr 20, 8:52 PM CDT	Tornado Warning	DVN	Henry	34 min
Apr 20, 9:06 PM CDT	Tornado Warning Tornado observed	DVN	Henry, Rock Island, Whiteside	24 min
Apr 20, 9:14 PM CDT	Tornado Warning	DVN	Bureau, Henry, Whiteside	31 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2025 Every severe thunderstorm warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.