Alert archive / Iowa / Special Weather Statements in 2021

Special Weather Statement, NWS Quad Cities, IA

July 14, 2021Buchanan County, Iowa

NWS Quad Cities, IA issued this special weather statement at Jul 14, 2021, 5:38 AM CDT for Buchanan County, Iowa. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 14, 2021, 5:38 AM CDT (10:38 UTC)
Expired
Jul 14, 2021, 6:15 AM CDT
In force
37 min
Issued by
NWS Quad Cities, IA

County Buchanan County, IA

The radar

The La Crosse radar (KARX), 148 km from the middle of the area, began a volume at 10:41 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 nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 10.6 hours before the alert went out and 160 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2021-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 476 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2021-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
476 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1203 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
15 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

<!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>

What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 14, 2:12 AM CDT, 3 hours 26 minutes earlier.

Area forecast discussion, Jul 14, 2:12 AM CDT, 3 hours 26 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, 3:03 AM CDT, 2 hours 35 minutes before
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
303 AM CDT Wed Jul 14 2021

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-150815-
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-
303 AM CDT Wed Jul 14 2021

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

The Storm Prediction Center has an enhanced risk for severe
thunderstorms along and north of a Freeport, Illinois to Belle
Plaine, Iowa line. There is a slight risk as far south as a
Mendota, Illinois to Ottumwa, Iowa line.

Super cells and organized bowing segments are likely ahead of a
slow moving cold front, especially in the afternoon and evening.
The main threats will be damaging winds, large hail and isolated
tornadoes. There is the potential for flash flooding especially
where slow moving thunderstorms move repeatedly over the same
areas.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

Thursday, there is a marginal risk for severe storms south of a
Rockford, Illinois to Bloomfield, Iowa line. The main threats will
be strong winds and large hail.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed today and tonight.

In the hours before

Special weather statement, Jul 14, 5:38 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
538 AM CDT Wed Jul 14 2021

IAC019-141115-
Buchanan-
538 AM CDT Wed Jul 14 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN BUCHANAN COUNTY
UNTIL 615 AM CDT...

At 537 AM CDT, a strong thunderstorm was located over Fairbank, or
near Oelwein, moving east at 20 mph.

Pea size hail is possible with this storm.

Locations impacted include...
Fairbank, Hazleton, Stanley, Fontana County Park and Fontana Park.

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4255 9181 4262 9208 4264 9208 4264 9181
TIME...MOT...LOC 1037Z 274DEG 20KT 4266 9203

Gibbs

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 9:32 AM CDTSpecial Weather StatementDVNKeokuk28 min
Jul 14, 10:02 AM CDTSpecial Weather StatementDVNBenton, Iowa, Jefferson, Keokuk, Washington28 min
Jul 14, 10:28 AM CDTSpecial Weather StatementDVNBenton, Buchanan, Henry, Iowa, Jefferson, Johnson and 1 more32 min
Jul 14, 10:58 AM CDTSpecial Weather StatementDVNDelaware, Johnson, Linn, Louisa, Washington32 min
Jul 14, 11:31 AM CDTSpecial Weather StatementDVNCedar, Clinton, Dubuque, Jackson, Jones, Scott29 min
Jul 14, 11:40 AM CDTSevere Thunderstorm WarningDVNDelaware, Dubuque, Jackson35 min
Jul 14, 12:15 PM CDTSpecial Weather StatementDVNClinton, Dubuque, Jackson30 min
Jul 14, 12:35 PM CDTSevere Thunderstorm WarningDVNDubuque, Jackson40 min
Jul 14, 1:07 PM CDTSpecial Weather StatementDVNScott38 min
Jul 14, 6:04 PM CDTSevere Thunderstorm WarningDVNBuchanan41 min
Jul 14, 6:25 PM CDTTornado WarningDVNBuchanan50 min
Jul 14, 6:32 PM CDTSevere Thunderstorm WarningDVNBenton, Buchanan43 min
Jul 14, 6:56 PM CDTSevere Thunderstorm WarningDVNBuchanan, Delaware49 min
Jul 14, 6:58 PM CDTTornado WarningDVNBenton47 min
Jul 14, 1:13 PM CDTSpecial Weather StatementDVNCarroll, Jo Daviess, Stephenson, Whiteside32 min
Jul 14, 1:47 PM CDTSpecial Weather StatementDVNWhiteside28 min
Jul 14, 2:03 PM CDTSpecial Weather StatementDVNStephenson42 min
Jul 14, 2:17 PM CDTSpecial Weather StatementDVNHenry, Whiteside28 min
Jul 14, 2:49 PM CDTSpecial Weather StatementDVNBureau41 min
Jul 14, 3:30 PM CDTSpecial Weather StatementDVNBureau45 min
Jul 14, 4:27 PM CDTSevere Thunderstorm WarningDVNBureau, Putnam33 min

Nearby

Special Weather Statements in Iowa, 2021Every special weather statement in 2021

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.