Alert archive / North Dakota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 51, NWS Grand Forks, ND

August 12, 1994Barnes County, Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 12, 1994, 8:27 PM CDT for Barnes County, Cass County, North Dakota. It was in force for 63 min.

The area

The counties it named.

The facts

Issued: Aug 12, 1994, 8:27 PM CDT (01:27 UTC)
Expired: Aug 12, 1994, 9:30 PM CDT
In force: 63 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

Counties Barnes County, ND, Cass County, ND

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.5 hours before the alert went out and 373 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: 907 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1020 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

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 12, 6:42 PM CDT, 1 hour 45 minutes before

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Special weather statement, Aug 12, 7:40 PM CDT, 47 minutes before

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<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.
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      <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 12, 11:08 PM CDT	Severe Thunderstorm Warning	FGF	Lake of the Woods, Roseau	37 min
Aug 13, 12:02 AM CDT	Severe Thunderstorm Warning	FGF	Polk	58 min
Aug 13, 12:54 AM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	66 min
Aug 13, 1:59 AM CDT	Severe Thunderstorm Warning	FGF	Becker, Otter Tail	61 min
Aug 13, 3:54 AM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail	41 min
Aug 13, 3:54 AM CDT	Severe Thunderstorm Warning	FGF	Douglas	66 min

Nearby

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.