Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 167, NWS Aberdeen, SD

July 26, 1997Dewey County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 26, 1997, 4:03 AM MDT for Dewey County, South Dakota. It was in force for 32 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
Jul 26, 1997, 4:03 AM MDT (10:03 UTC)
Expired
Jul 26, 1997, 4:35 AM MDT
In force
32 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 10:07 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 00:00Z, 10.1 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 1997-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1406 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 1997-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
1406 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1360 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.2

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 25, 7:40 PM MDT, 8 hours 23 minutes earlier.

Area forecast discussion, Jul 25, 7:40 PM MDT, 8 hours 23 minutes before
AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
0830 PM CDT FRI JUL 25 1997

SATELLITE AND RADAR INDICATE THUNDERSTORMS DEVELOPING ALONG SEVERAL
BOUNDARIES IN NORTHERN SD. THUNDERSTORMS MOVING ESE AND DEVELOPING TO
THE SOUTH. CURRENT FORECAST STILL LOOKS ON TRACK.

.ABR...NONE

WCT

In the hours before

Local storm report, Jul 25, 10:41 PM MDT, 5 hours 22 minutes before
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Local storm report, Jul 25, 10:42 PM MDT, 5 hours 21 minutes before
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Special weather statement, Jul 26, 12:59 AM MDT, 3 hours 4 minutes before
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Special weather statement, Jul 26, 1:00 AM MDT, 3 hours 3 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 6:15 PM MDTTornado WarningABRMarshall50 min
Jul 25, 6:25 PM MDTSevere Thunderstorm WarningABRCorson, Dewey65 min
Jul 25, 6:31 PM MDTTornado WarningABRBrown, Spink49 min
Jul 25, 6:59 PM MDTTornado WarningABRDewey61 min
Jul 25, 7:21 PM MDTSevere Thunderstorm WarningABRSpink59 min
Jul 25, 7:26 PM MDTTornado WarningABRSpink64 min
Jul 25, 7:43 PM MDTSevere Thunderstorm WarningABRClark62 min
Jul 25, 7:52 PM MDTSevere Thunderstorm WarningABRPotter63 min
Jul 25, 8:43 PM MDTSevere Thunderstorm WarningABRHamlin47 min
Jul 26, 4:22 AM MDTSevere Thunderstorm WarningABRPotter, Sully63 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1997Every 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.