Alert archive / Iowa / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 32, NWS Quad Cities, IA

May 14, 1991Scott County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at May 14, 1991, 3:37 PM CDT for Scott County, Iowa. It was in force for 68 min.

The area

The counties it named.

The facts

Issued: May 14, 1991, 3:37 PM CDT (20:37 UTC)
Expired: May 14, 1991, 4:45 PM CDT
In force: 68 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

County Scott County, IA

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.6 hours before the alert went out and 377 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2865 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, May 14, 12:53 PM CDT, 2 hours 44 minutes before

ILZ004-IAZ015-141830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
12 40 PM CDT   TUE MAY 14 1991

...VERY STRONG THUNDERSTORM WESTERN CLINTON COUNTY IOWA...

THUNDERSTORMS STRETCHED ACROSS EAST IOWA INTO NORTHWEST ILLINOIS MORTH
OF THE QUAD CITIES HAVE INCREASED IN INTENSITY IN THE EAST CENTRAL IOWA
SECTION.

AT 12 45 PM A THUNDERSTORM OVER WESTERN CLINTON COUNTY /20 MILES WEST OF
CLINTON/ HAS BECOME VERY STRONG AND MAY BE PRODUCING HEAVY RAINFALL AND
HAIL.  THIS STORM IS DRIFTING SLOWLY TO THE NORTH AT AROUND 5 MPH.

PERSONS SHOULD BE ALERT FOR CHANGING WEATHER CONDITIONS AND BE PREPARED
TO MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES.

DICKEY

Special weather statement, May 14, 1:34 PM CDT, 2 hours 3 minutes before

ILZ004-IAZ015-141915-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
1 30 PM CDT   TUE MAY 14 1991

...THUNDERSTORM WESTERN CLINTON COUNTY IOWA DECREASES...

THE VERY STRONG THUNDERSTORM IN WESTERN CLINTON COUNTY HAS DECREASED IN
INTENSITY SINCE 12 45 PM.  THIS STORM CONTINUES TO DRIFT SLOWLY TO THE
NORTH AT AROUND 5 MPH.  MEANWHILE FARTHER TO THE NORTHWEST IN LINN AND
PARTS OF JONES COUNTIES, SEVERE THUNDERSTORMS WITH HEAVY RAIN AND HAIL
WERE OCCURRING.

CONDITIONS STILL REMAIN FAVORABLE FOR THUNDERSTORM DEVELOP ACROSS THE
BISTATE AREA THIS AFTERNOON.

PERSONS SHOULD BE ALERT FOR CHANGING WEATHER CONDITIONS AND BE PREPARED
TO MOVE TO A PLACE OF SAFETY IF THREATENING WEATHEBR APPROACHES.

DICKEY

Special weather statement, May 14, 2:15 PM CDT, 1 hour 22 minutes before

ILZ004-IAZ015-142000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOLINE IL
2 10 PM CDT   TUE MAY 14 1991

AT 2 05 PM A POSSIBLE FUNNEL CLOUD WAS REPORTED OVER MOUNT VERNON IOWA
ABOUT 10 MILES SOUTHEAST OF CEDAR RAPIDS.  THIS POSSIBLE FUNNEL CLOUD
WAS MOVING INTO THE NORTHWEST CORNER OF CEDAR COUNTY IOWA.  IF YOU
LIVE IN NORTHWEST OR NORTH CENTRAL CEDAR COUNTY BE PREPARED TO SEEK
SHELTER IF NECCESARY.

OTHER STRONG THUNDERSTORMS WERE LOCATED ACROSS NORTH CEDAR EXTENDING
INTO NORTH SCOTT AND CENTRAL CLINTON COUNTIES.

HEAVY RAIN AND HAIL ARE POSSIBLE WITH THESE STORMS.  PERSONS SHOULD BE
ALERT FOR CHANGING WEATHER CONDITIONS AND BE PREPARED TO MOVE TO A
PLACE OF SAFETY IF THREATENINwG WEATHER APPROACHES.

MEYER/DICKEY

Special weather statement, May 14, 2:46 PM CDT, 51 minutes before

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Local storm report, May 14, 3:18 PM CDT, 19 minutes before

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<body>
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    <section class="card" role="status" aria-live="polite">
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Special weather statement, May 14, 3:30 PM CDT, 7 minutes before

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<head>
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  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <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.
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The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 6:26 AM CDT	Severe Thunderstorm Warning	DVN	Clayton	34 min
May 14, 1:38 PM CDT	Tornado Warning	DVN	Delaware	37 min
May 14, 2:01 PM CDT	Tornado Warning	DVN	Dubuque	29 min
May 14, 2:45 PM CDT	Tornado Warning	DVN	Cedar	30 min
May 14, 3:23 PM CDT	Severe Thunderstorm Warning	DVN	Muscatine	67 min
May 14, 3:23 PM CDT	Severe Thunderstorm Warning	DVN	Henry	67 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1991 Every severe thunderstorm warning in 1991

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.