Alert archive / Minnesota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 29, NWS Grand Forks, ND

June 4, 1999Marshall County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 4, 1999, 6:16 AM CDT for Marshall County, Minnesota. It was in force for 34 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 4, 1999, 6:16 AM CDT (11:16 UTC)
Expired
Jun 4, 1999, 6:50 AM CDT
In force
34 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Marshall County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 117 km from the middle of the area, began a volume at 11:16 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Jun 4, 6:30 AM CDTHail 0.75Warren, MN

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 11.3 hours before the alert went out and 370 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 1999-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 59 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 1999-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 270 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
59 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
1938 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
270 m²/s²
0-3 km storm-relative helicity
297 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.0

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.

NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 4, 3:30 AM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, Jun 4, 3:30 AM CDT, 2 hours 46 minutes before
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In the hours before

Local storm report, Jun 4, 3:00 AM CDT, 3 hours 16 minutes before
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    <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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Special weather statement, Jun 4, 3:10 AM CDT, 3 hours 6 minutes before
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<head>
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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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        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 Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 3, 7:25 PM CDTSevere Thunderstorm WarningFGFBarnes, Cass35 min
Jun 3, 8:23 PM CDTSevere Thunderstorm WarningFGFEddy32 min
Jun 3, 8:46 PM CDTSevere Thunderstorm WarningFGFGriggs34 min
Jun 3, 8:54 PM CDTSevere Thunderstorm WarningFGFEddy, Nelson36 min
Jun 3, 9:20 PM CDTSevere Thunderstorm WarningFGFGriggs35 min
Jun 3, 9:27 PM CDTSevere Thunderstorm WarningFGFNelson33 min
Jun 3, 9:53 PM CDTSevere Thunderstorm WarningFGFGrand Forks32 min
Jun 4, 1:11 AM CDTSevere Thunderstorm WarningFGFCass, Steele, Traill29 min
Jun 4, 4:04 AM CDTSevere Thunderstorm WarningFGFNelson, Walsh31 min
Jun 4, 4:04 AM CDTSevere Thunderstorm WarningFGFPembina31 min
Jun 4, 4:43 AM CDTSevere Thunderstorm WarningFGFWalsh32 min
Jun 4, 5:14 AM CDTSevere Thunderstorm WarningFGFGrand Forks31 min
Jun 4, 4:38 PM CDTSevere Thunderstorm WarningFGFPennington32 min
Jun 4, 5:04 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater36 min
Jun 4, 5:21 PM CDTSevere Thunderstorm WarningFGFPolk34 min
Jun 4, 5:37 PM CDTSevere Thunderstorm WarningFGFBeltrami33 min
Jun 4, 5:55 PM CDTSevere Thunderstorm WarningFGFNorman, Polk35 min
Jun 4, 6:30 PM CDTSevere Thunderstorm WarningFGFClearwater, Polk35 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1999Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.