Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 12, NWS Duluth, MN

June 28, 1997Aitkin County, Crow Wing County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jun 28, 1997, 2:15 PM CDT for Aitkin County, Crow Wing County, Minnesota. It was in force for 60 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 28, 1997, 2:15 PM CDT (19:15 UTC)
Expired: Jun 28, 1997, 3:15 PM CDT
In force: 60 min
Issued by: NWS Duluth, MN
Area: Whole counties

Counties Aitkin County, MN, Crow Wing County, MN

The radar

The Duluth radar (KDLH), 121 km from the middle of the area, began a volume at 19:16 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

Time	Report	Where	Remark
Jun 28, 2:50 PM CDT	Thunderstorm Wind 55	Aitkin, MN	Strong thunderstorm winds blew down many trees and power lines across a wide area from east and north of Mille Lacs Lake to the vicinity of Aitkin. Wind speed is estimated.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 28, 12:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.3 hours before the alert went out and 189 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: 1849 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 891 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 201 m²/s²
0-3 km storm-relative helicity: 197 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.5

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 Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 28, 2:17 AM CDT, 11 hours 58 minutes earlier.

Area forecast discussion, Jun 28, 2:17 AM CDT, 11 hours 58 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 Duluth, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 27, 9:01 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	59 min
Jun 27, 9:24 PM CDT	Severe Thunderstorm Warning	DLH	Itasca	66 min
Jun 27, 10:04 PM CDT	Tornado Warning	DLH	Itasca	41 min
Jun 27, 11:16 PM CDT	Severe Thunderstorm Warning	DLH	Itasca	59 min
Jun 28, 1:48 AM CDT	Severe Thunderstorm Warning	DLH	Cass	57 min
Jun 28, 1:10 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Crow Wing	65 min
Jun 28, 2:57 PM CDT	Severe Thunderstorm Warning	DLH	Carlton, Pine	63 min
Jun 28, 3:35 PM CDT	Severe Thunderstorm Warning	DLH	Burnett, Douglas, Washburn	55 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1997 Every severe thunderstorm warning in 1997

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.