Alert archive / Iowa / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 116, NWS Des Moines, IA

June 19, 1994Benton County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 19, 1994, 6:09 PM CDT for Benton County, Iowa. It was in force for 36 min.

The area

The counties it named.

The facts

Issued: Jun 19, 1994, 6:09 PM CDT (23:09 UTC)
Expired: Jun 19, 1994, 6:45 PM CDT
In force: 36 min
Issued by: NWS Des Moines, IA
Area: Whole counties

County Benton County, IA

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 11.2 hours before the alert went out and 332 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: 741 J/kg
Mixed-layer CIN: -153 J/kg
Mixed-layer LCL: 734 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 130 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, Jun 19, 2:50 PM CDT, 3 hours 19 minutes before

IAZALL-192100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
250 PM CDT SUN JUN 19 1994

...THUNDERSTORMS STALLING OVER CENTRAL IOWA COUNTIES...

AT 235 PM CDT DOPPLER RADAR INDICATED STRONG THUNDERSTORMS WITH VERY
HEAVY RAIN AFFECTING TAMA...GRUNDY...AND MARSHALL COUNTIES.  THE MOST
INTENSE RAINS STALLED OVER NORTHERN MARSHALL COUNTY JUST NORTH OF
MARSHALLTOWN.  THE STORM TOTAL PRECIPITATION HAS REACHED AMOUNTS OF
1 TO 3 INCHES HOWEVER DURING THE PAST TEN MINUTES THE STORMS WERE
WEAKENING.

BE AWARE OF PONDING WATER AND LOCALIZED FLOODING IN DITCHES AND LOW
LYING AREAS.

KAUFMAN

Special weather statement, Jun 19, 2:51 PM CDT, 3 hours 18 minutes before

IAZALL-192100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
250 PM CDT SUN JUN 19 1994

...THUNDERSTORMS STALLING OVER CENTRAL IOWA COUNTIES...

AT 235 PM CDT DOPPLER RADAR INDICATED STRONG THUNDERSTORMS WITH VERY
HEAVY RAIN AFFECTING TAMA...GRUNDY...AND MARSHALL COUNTIES.  THE MOST
INTENSE RAINS STALLED OVER NORTHERN MARSHALL COUNTY JUST NORTH OF
MARSHALLTOWN.  THE STORM TOTAL PRECIPITATION HAS REACHED AMOUNTS OF
1 TO 3 INCHE
S HOWEVER DURING THE PAST TEN MINUTES THE STORMS WERE
WEAKENING.

BE AWARE OF PONDING WATER AND LOCALIZED FLOODING IN DITCHES AND LOW
LYING AREAS.

KAUFMAN

Special weather statement, Jun 19, 4:25 PM CDT, 1 hour 44 minutes before

IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038-
039-040-192230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WATERLOO IA
425 PM CDT SUN JUN 19 1994

...THUNDERSTORMS CONTINUED TO RUMBLE IN NORTHEAST IOWA...

AT 425 PM SCATTERED STORMS WERE LOCATED FROM WATERLOO AND LAPORTE CITY
NORTH TO NEAR CHARLES CITY (30 MILES NORTH OF WATERLOO) AND EXTENDING
SOUTHEAST TO FAYETTE (30 MILES SOUTH OF DECORAH). OTHER STORMS WERE
DEVELOPING ALONG AND WEST OF I-35 AS WELL. THROUGH 6 PM SCATTERED
STORMS WILL CONTINUE TO PRODUCE ISOLATED LOCALLY HEAVY RAINS AND DEADLY
LIGHTNING...ESPECIALLY ALONG AND EAST OF HIGHWAY 218 AND SOUTH OF
HIGHWAY 18. SCATTERED STORMS WILL TRAVEL AREAS WEST OF MASON CITY AND
HAMPTON AS WELL.

AN URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT FOR
FLOYD AND BUTLER COUNTIES UNTIL 6 PM. DO NOT CROSS ROADWAYS THAT ARE
FLOODED.

COLLAR

Special weather statement, Jun 19, 4:27 PM CDT, 1 hour 42 minutes before

IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038-
039-040-192230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WATERLOO IA
425 PM CDT SUN JUN 19 1994

...THUNDERSTORMS CONTINUED TO RUMBLE IN NORTHEAST IOWA...

AT 425 PM SCATTERED STORMS WERE LOCATED FROM WATERLOO AND LAPORTE CITY
NORTH TO NEAR CHARLES CITY (30 MILES NORTH OF WATERLOO) AND EXTENDING
SOUTHEAST TO FAYETTE (30 MILES SOUTH OF DECORAH). OTHER STORMS WERE
DEVELOPING ALONG AND WEST OF I-35 AS WELL. THROUGH 6 PM SCATTERED
STORMS WILL CONTINUE TO PRODUCE ISOLATED LOCALLY HEAVY RAINS AND DEADLY
LIGHTNING...ESPECIALLY ALONG AND EAST OF HIGHWAY 218 AND SOUTH OF
HIGHWAY 18. SCATTERED STORMS WILL TRAVEL AREAS WEST OF MASON CITY AND
HAMPTON AS WELL.

AN URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT FOR
FLOYD AND BUTLER COUNTIES UNTIL 6 PM. DO NOT CROSS ROADWAYS THAT ARE
FLOODED.

COLLAR

Special weather statement, Jun 19, 5:30 PM CDT, 39 minutes before

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Special weather statement, Jun 19, 5:33 PM CDT, 36 minutes before

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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.
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The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 18, 7:12 PM CDT	Tornado Warning	DMX	Humboldt	18 min
Jun 19, 2:51 PM CDT	Severe Thunderstorm Warning	DMX	Grundy	39 min
Jun 19, 4:32 PM CDT	Severe Thunderstorm Warning	DMX	Story	28 min
Jun 19, 4:48 PM CDT	Tornado Warning	DMX	Hardin	27 min
Jun 19, 5:44 PM CDT	Severe Thunderstorm Warning	DMX	Linn	31 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1994 Every severe thunderstorm warning in 1994

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.