Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 180, NWS Aberdeen, SD

August 3, 1997Dewey County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 3, 1997, 4:22 PM MDT for Dewey County, South Dakota. It was in force for 33 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: Aug 3, 1997, 4:22 PM MDT (22:22 UTC)
Expired: Aug 3, 1997, 4:55 PM MDT
In force: 33 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Dewey County, SD

The radar

The Bismarck radar (KBIS), 180 km from the middle of the area, began a volume at 22:26 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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.4 hours before the alert went out and 180 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: 812 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 1501 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 3, 9:46 AM MDT, 6 hours 36 minutes earlier.

Area forecast discussion, Aug 3, 9:46 AM MDT, 6 hours 36 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
1040 AM CDT SUN AUG 3 1997

HAVE UPDATED ENTIRE PACKAGE...MOSTLY TO MAKE MINOR ADJUSTMENTS TO
TEMPERATURES AND TO FRESHEN WORDING. HAVE INTORDUCED 20 PCT POPS IN
BIG STONE/TRAVERSE COUNTIES. WEAK FRONT IN ND SHUD DRIFT SOUTH
DURING THE AFTERNOON...AND THERE IS STILL PLENTY OF INSTABILITY
AROUND. MODIFIED SOUNDING FOR ABR GIVES LI OF -7 AND CAPE AROUND
2500 J/KG.

.ABR...NONE

MIDDLEBROOKE

In the hours before

Special weather statement, Aug 3, 10:30 AM MDT, 5 hours 52 minutes before

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Special weather statement, Aug 3, 10:31 AM MDT, 5 hours 51 minutes before

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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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The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 3, 5:15 PM MDT	Severe Thunderstorm Warning	ABR	Dewey, Potter	30 min
Aug 3, 5:37 PM MDT	Severe Thunderstorm Warning	ABR	Sully	33 min
Aug 3, 5:55 PM MDT	Severe Thunderstorm Warning	ABR	Hand	45 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.