Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 123, NWS Sioux Falls, SD

August 7, 1994Nobles County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 7, 1994, 8:36 PM CDT for Nobles County, Minnesota. It was in force for 39 min.

The area

The counties it named.

The facts

Issued: Aug 7, 1994, 8:36 PM CDT (01:36 UTC)
Expired: Aug 7, 1994, 9:15 PM CDT
In force: 39 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Nobles County, MN

The nearest sounding before it

Minneapolis, MN (KSTC), launched 00:00Z, 1.6 hours before the alert went out and 216 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: 2071 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 998 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.3

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, Aug 7, 7:03 PM CDT, 1 hour 33 minutes before

IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-080100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
703 PM CDT SUN AUG 7 1994

...THUNDERSTORMS WILL MOVE INTO THE AREA BY MIDDLE EVENING...

SCATTERED THUNDERSTORMS THAT WERE DEVELOPING IN NORTH CENTRAL NEBRASKA
AND SOUTHEAST SOUTH DAKOTA WILL MOVE INTO THE AREA BY MIDDLE EVENING.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT FOR DIXON COUNTY
NEBRASKA...UNION COUNTY SOUTH DAKOTA...AND PLYMOUTH COUNTY IOWA.
A SEVERE THUNDERSTORM WATCH IS ALSO IN EFFECT UNTIL 1 AM CDT FOR
OBRIEN...CHEROKEE...WOODBURY AND IDA COUNTIES IN IOWA.

PEOPLE IN THESE WATCH AREAS SHOULD KEEP THEIR EYE ON THE SKY AND LISTEN
FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

MICHELS

Special weather statement, Aug 7, 7:06 PM CDT, 1 hour 30 minutes before

IAZ021-032-043-013-020-031-NEZ014-013-015-SDZ071-080100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
703 PM CDT SUN AUG 7 1994

...THUNDERSTORMS WILL MOVE INTO THE AREA BY MIDDLE EVENING...

SCATTERED THUNDERSTORMS THAT WERE DEVELOPING IN NORTH CENTRAL NEBRASKA
AND SOUTHEAST SOUTH DAKOTA WILL MOVE INTO THE AREA BY MIDDLE EVENING.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT FOR DIXON COUNTY
NEBRASKA...UNION COUNTY SOUTH DAKOTA...AND PLYMOUTH COUNTY IOWA.
A SEVERE THUNDERSTORM WATCH IS ALSO IN EFFECT UNTIL 1 AM CDT FOR
OBRIEN...CHEROKEE...WOODBURY AND IDA COUNTIES IN IOWA.

PEOPLE IN THESE WATCH AREAS SHOULD KEEP THEIR EYE ON THE SKY AND LISTEN
FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

MICHELS

Special weather statement, Aug 7, 7:55 PM CDT, 41 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, Aug 7, 7:57 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>

Special weather statement, Aug 7, 8:13 PM CDT, 23 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, Aug 7, 8:15 PM CDT, 21 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 Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 7, 8:49 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, Osceola	56 min
Aug 7, 9:14 PM CDT	Severe Thunderstorm Warning	FSD	O'Brien	46 min
Aug 7, 9:49 PM CDT	Severe Thunderstorm Warning	FSD	Sioux	56 min
Aug 7, 10:01 PM CDT	Severe Thunderstorm Warning	FSD	O'Brien	29 min
Aug 7, 10:20 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee	40 min
Aug 7, 11:51 PM CDT	Severe Thunderstorm Warning	FSD	Monona	24 min
Aug 8, 12:17 AM CDT	Tornado Warning	FSD	Monona	28 min
Aug 7, 7:40 PM CDT	Severe Thunderstorm Warning	FSD	Turner	35 min
Aug 7, 7:35 PM CDT	Severe Thunderstorm Warning	FSD	Jackson, Nobles	55 min
Aug 7, 7:47 PM CDT	Tornado Warning	FSD	Nobles	24 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 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.