Alert archive / Iowa / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 187, NWS Quad Cities, IA

July 14, 2023Clinton County, Jackson County, Jones County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 14, 2023, 4:32 PM CDT for Clinton County, Jackson County, Jones County, Iowa. It was in force for 58 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: Jul 14, 2023, 4:32 PM CDT (21:32 UTC)
Expired: Jul 14, 2023, 5:30 PM CDT
In force: 58 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Clinton County, IA, Jackson County, IA, Jones County, IA

The radar

The Quad Cities radar (KDVN), 52 km from the middle of the area, began a volume at 21:34 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
Jul 14, 3:52 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.5 hours before the alert went out and 279 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 354 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1297 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

Open this sounding in Storm Lab

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 Jul 14, 2:47 PM CDT, 1 hour 45 minutes earlier.

Area forecast discussion, Jul 14, 2:47 PM CDT, 1 hour 45 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, Jul 14, 7:54 AM CDT, 8 hours 38 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
754 AM CDT Fri Jul 14 2023

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-151300-
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-
754 AM CDT Fri Jul 14 2023

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

Thunderstorms are expected especially this afternoon and tonight.
The Storm Prediction Center has a slight risk of severe storms
across most of the area. The primary severe risk is damaging winds
with large hail as a secondary risk. Heavy rain and frequent
lightning can be expected with any storm.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

Daily chances for showers and thunderstorms exist through the
period. There is a chance for strong to isolated severe storms
each day.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and evening.

In the hours before

Special weather statement, Jul 14, 2:53 PM CDT, 1 hour 39 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>

Special weather statement, Jul 14, 2:58 PM CDT, 1 hour 34 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>

Local storm report, Jul 14, 3:53 PM CDT, 39 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
Jul 13, 7:36 PM CDT	Special Weather Statement	DVN	Muscatine	39 min
Jul 13, 10:44 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan	46 min
Jul 14, 2:53 PM CDT	Special Weather Statement	DVN	Delaware	67 min
Jul 14, 2:58 PM CDT	Special Weather Statement	DVN	Buchanan	62 min
Jul 14, 3:15 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware, Jones, Linn	45 min
Jul 14, 3:25 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque, Jackson, Jones	50 min
Jul 14, 4:12 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jackson, Jones	48 min
Jul 14, 4:40 PM CDT	Special Weather Statement	DVN	Muscatine	80 min
Jul 14, 4:44 PM CDT	Special Weather Statement	DVN	Delaware	46 min
Jul 14, 5:11 PM CDT	Special Weather Statement	DVN	Des Moines	49 min
Jul 14, 5:30 PM CDT	Special Weather Statement	DVN	Scott	45 min
Jul 14, 5:32 PM CDT	Special Weather Statement	DVN	Clinton, Jackson	43 min
Jul 14, 6:22 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines	38 min
Jul 13, 8:01 PM CDT	Special Weather Statement	DVN	Whiteside	44 min
Jul 13, 8:34 PM CDT	Special Weather Statement	DVN	Bureau	26 min
Jul 13, 8:54 PM CDT	Special Weather Statement	DVN	Bureau	36 min
Jul 13, 8:58 PM CDT	Severe Thunderstorm Warning	DVN	Bureau	47 min
Jul 14, 6:00 PM CDT	Special Weather Statement	DVN	Henry, Mercer, Rock Island	45 min
Jul 14, 6:06 PM CDT	Special Weather Statement	DVN	Carroll, Whiteside	39 min
Jul 14, 6:12 PM CDT	Special Weather Statement	DVN	Henderson, Warren	78 min
Jul 14, 6:30 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Mercer	34 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2023 Every severe thunderstorm warning in 2023

Sources

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