Alert archive / South Dakota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 157, NWS Aberdeen, SD

July 22, 2001Codington County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 22, 2001, 8:00 PM CDT for Codington County, South Dakota. It was in force for 45 min. 2 reports 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: Jul 22, 2001, 8:00 PM CDT (01:00 UTC)
Expired: Jul 22, 2001, 8:45 PM CDT
In force: 45 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Codington County, SD

The radar

The Aberdeen radar (KABR), 110 km from the middle of the area, began a volume at 01:02 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
Jul 22, 8:15 PM CDT	Hail 1.5	Rauville, SD
Jul 22, 8:33 PM CDT	Hail 0.75	Waverly, SD

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
Jul 22, 6:15 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 1.0 hours before the alert went out and 96 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: 2747 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1276 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 13.2

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 Jul 22, 3:15 PM CDT, 4 hours 45 minutes earlier.

Area forecast discussion, Jul 22, 3:15 PM CDT, 4 hours 45 minutes before

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In the hours before

Local storm report, Jul 22, 2:16 PM CDT, 5 hours 44 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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 7:36 PM CDT	Severe Thunderstorm Warning	ABR	Codington	24 min
Jul 23, 12:31 AM CDT	Severe Thunderstorm Warning	ABR	Jones, Stanley	29 min
Jul 23, 12:41 AM CDT	Severe Thunderstorm Warning	ABR	Day, Roberts	64 min
Jul 23, 1:28 AM CDT	Severe Thunderstorm Warning	ABR	Big Stone	32 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2001 Every severe thunderstorm warning in 2001

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.