Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 27, NWS Duluth, MN

May 15, 1998Crow Wing County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at May 15, 1998, 2:29 PM CDT for Crow Wing County, Minnesota. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 15, 1998, 2:29 PM CDT (19:29 UTC)
Expired: May 15, 1998, 3:15 PM CDT
In force: 46 min
Issued by: NWS Duluth, MN
Area: Whole counties

County Crow Wing County, MN

The watch it was issued in

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

Issued	Product	Office	Lasted
May 15, 2:00 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.5 hours before the alert went out and 185 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: 1571 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 642 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 6.5

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 May 15, 2:00 PM CDT, 29 minutes earlier.

Area forecast discussion, May 15, 2:00 PM CDT, 29 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
200 PM CDT FRI MAY 15 1998

LOW PRESSURE IS SUPPOSED TO MOVE NORTHWARD THROUGH EASTERN MN
TONIGHT.  THE ETA IS THE WEAKEST...FURTHEST WEST...AND FASTEST.  THE
NGM MOVES THE LOW RIGHT OVER DLH...CENTERING IT HALFWAY UP THE U.S.
NORTH SHORE SATURDAY MORNING.  RAIN IS CERTAIN AND THUNDER IS
CEERTAIN WITH A STRONG WEST WIND EXPECTED TO FOLLOW.

ATTM...A COMPLEX OF MERGING CELLS IS MOVING NORTH INTO SOUTHERN MN.
THE MOST GROWTH AND LIGHTNING IS IN WEST-CENTRAL IOWA...WITH THE
LARGE CIRRUS SHIELD OVER THE SOUTHERN HALF OF MN WARMING.  THE RUC
HAS SURFACE 70F /21C/ DEW POINTS SWEEPING UP THROUGH IL AND WI...
THEN SPREADING NORTHWESTWARD INTO THE DLH AREA THIS EVENING.  THE
LACK OF STORM DEVELOPMENT ALONG THAT PATH INDICATES THAT THE
MOISTURE WILL ACTUALLY GET HERE AND FEED STORMS IN THIS AREA.

EOM

In the hours before

Special weather statement, May 15, 9:30 AM CDT, 4 hours 59 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, May 15, 9:30 AM CDT, 4 hours 59 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, May 15, 11:30 AM CDT, 2 hours 59 minutes before

MNZ010>012-018>021-025-026-152200-

SEVERE WEATHER OUTLOOK...UPDATED...
NATIONAL WEATHER SERVICE DULUTH MN
1130 AM CDT FRI MAY 15 1998

...MODERATE RISK FOR SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...

THREAT...
THUNDERSTORMS WITH HEAVY RAIN...LARGE HAIL...AND DAMAGING WINDS.

DISCUSSION...
DEVELOPING LOW PRESSURE OVER KANSAS WILL DEEPEN AS IT MOVES JUST
WEST OF DULUTH THIS EVENING.  HUMID UNSTABLE AIR WILL REMAIN ALONG
AND EAST OF NTHE LOW TRACK.  ISOLATED SEVERE THUNDERSTORMS ARE MOST
LIKELY FROM MIDAFTERNOON ON.

SPOTTER ACTIVATION...
SEVERE WEATHER SPOTTER ACTIVATION MAY BE NEEDED AFTER 400 PM CDT.

EOM

The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 15, 3:09 AM CDT	Severe Thunderstorm Warning	DLH	Koochiching	46 min
May 15, 4:16 AM CDT	Severe Thunderstorm Warning	DLH	Koochiching	49 min
May 15, 5:47 AM CDT	Severe Thunderstorm Warning	DLH	Cass	48 min
May 15, 6:11 AM CDT	Severe Thunderstorm Warning	DLH	Itasca	44 min
May 15, 5:04 PM CDT	Severe Thunderstorm Warning	DLH	Pine	56 min
May 15, 5:04 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin	56 min
May 15, 5:10 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	55 min
May 15, 5:23 PM CDT	Tornado Warning	DLH	Pine	62 min
May 15, 5:48 PM CDT	Tornado Warning	DLH	Pine	27 min
May 15, 6:06 PM CDT	Severe Thunderstorm Warning	DLH	Carlton	59 min
May 15, 6:06 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin	59 min
May 15, 6:17 PM CDT	Severe Thunderstorm Warning	DLH	Pine	48 min
May 15, 6:41 PM CDT	Tornado Warning	DLH	Carlton, Pine	34 min
May 15, 6:26 PM CDT	Severe Thunderstorm Warning	DLH	Burnett	44 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1998 Every severe thunderstorm warning in 1998

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.