Alert archive / Minnesota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 50, NWS Grand Forks, ND

August 7, 1994Clay County, Minnesota; Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 7, 1994, 1:02 AM CDT for Clay County, Minnesota; Cass County, North Dakota. It was in force for 58 min.

The area

The counties it named.

The facts

Issued: Aug 7, 1994, 1:02 AM CDT (06:02 UTC)
Expired: Aug 7, 1994, 2:00 AM CDT
In force: 58 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Clay County, MN, Cass County, ND

The nearest sounding before it

Aberdeen, SD (KHON), launched 00:00Z, 6.0 hours before the alert went out and 253 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: 1375 J/kg
Mixed-layer CIN: -165 J/kg
Mixed-layer LCL: 1550 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.9

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

Local storm report, Aug 6, 11:14 PM CDT, 1 hour 48 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
1115 PM CDT SAT AUG 6 1994

TIME      EVENT
1034 PM   GRIGGS COUNTY SHERIFF REPORTED ONE INCH HAIL NEAR SUTTON ND
          (35 N OF VALLEY CITY).

Local storm report, Aug 6, 11:15 PM CDT, 1 hour 47 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
1115 PM CDT SAT AUG 6 1994

TIME      EVENT
1034 PM   GRIGGS COUNTY SHERIFF REPORTED ONE INCH HAIL NEAR SUTTON ND
          (35 N OF VALLEY CITY).

Local storm report, Aug 6, 11:50 PM CDT, 1 hour 12 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
1150 PM CDT SAT AUG 6 1994

TIME      EVENT
1150 PM   GRAND FORKS CO.  SHERIFF REPORTED PEA TO MARBLE SIZE HAIL AT
          NORTHWOOD.

1150 PM   GRIGGS CO SHERIFF REPORTED PEA TO MARBLE SIZE HAIL AT COOPERSTOWN
          AND 40 TO 50 MPH WIND.

1150 PM   MAYOR OF TOLNA IN NELSON CO. REPROTED EST. 70 TO 80 MPH WINDS
          GRAIN ELEVATOR AND MOBILE HOME DAMAGED...NUMEROUS TREES DOWN
          DURING PAST HALF HOUR.

Local storm report, Aug 6, 11:56 PM CDT, 1 hour 6 minutes before

STORM REPORTS
NATIONAL WEATHER SERVICE FARGO ND
1150 PM CDT SAT AUG 6 1994

TIME      EVENT
1150 PM   GRAND FORKS CO.  SHERIFF REPORTED PEA TO MARBLE SIZE HAIL AT
          NORTHWOOD.

1150 PM   GRIGGS CO SHERIFF REPORTED PEA TO MARBLE SIZE HAIL AT COOPERSTOWN
          AND 40 TO 50 MPH WIND.

1150 PM   MAYOR OF TOLNA IN NELSON CO. REPROTED EST. 70 TO 80 MPH WINDS
          GRAIN ELEVATOR AND MOBILE HOME DAMAGED...NUMEROUS TREES DOWN
          DURING PAST HALF HOUR.

Local storm report, Aug 7, 12:45 AM CDT, 17 minutes before

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Local storm report, Aug 7, 12:55 AM CDT, 7 minutes before

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<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.
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The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 11:08 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	67 min
Aug 6, 10:21 PM CDT	Severe Thunderstorm Warning	FGF	Griggs	69 min
Aug 6, 10:36 PM CDT	Severe Thunderstorm Warning	FGF	Nelson	69 min
Aug 6, 11:04 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Steele	56 min
Aug 6, 11:35 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs	55 min
Aug 7, 12:11 AM CDT	Severe Thunderstorm Warning	FGF	Steele, Traill	64 min
Aug 7, 12:34 AM CDT	Severe Thunderstorm Warning	FGF	Griggs	56 min
Aug 7, 12:34 AM CDT	Severe Thunderstorm Warning	FGF	Cass	56 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1994 Severe Thunderstorm Warnings in North Dakota, 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.