Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 188, NWS Aberdeen, SD

August 9, 1997Dewey County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 9, 1997, 12:50 AM MDT for Dewey County, South Dakota. It was in force for 60 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 9, 1997, 12:50 AM MDT (06:50 UTC)
Expired
Aug 9, 1997, 1:50 AM MDT
In force
60 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 06:50 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, 6.8 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 1997-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 122 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 1997-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.193958Sfc1 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
122 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
2838 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 8, 8:06 PM MDT, 4 hours 44 minutes earlier.

Area forecast discussion, Aug 8, 8:06 PM MDT, 4 hours 44 minutes before
AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
900 PM CDT FRI AUG 8 1997

COLD FRONT ENTERING NW SD NOW...WITH SVR TSTM JUST AHEAD OF IT. THIS
STM WILL BEAR WATCHING AS IT APPROACHES WRN PART OF ABR CWA...AS IT
WILL BE MOVING INTO AN ENVIRONMENT WITH VERTICAL WIND PROFILE FAVORABLE
FOR ORGANIZED CONVECTION. WILL UPDATE ERN SD ZONES TO REMOVE 10 PM
TIME REFERENCE...AND LEAVE EVERYTHING ELSE AS IS.

.ABR...NONE.

MIDDLEBROOKE

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 2:02 AM MDTSevere Thunderstorm WarningABRFaulk, Spink63 min
Aug 9, 2:11 AM MDTSevere Thunderstorm WarningABRSully64 min
Aug 9, 3:16 AM MDTSevere Thunderstorm WarningABRHughes, Hyde, Sully64 min
Aug 9, 7:07 AM MDTSevere Thunderstorm WarningABRHand33 min
Aug 9, 9:02 AM MDTSevere Thunderstorm WarningABRClark48 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.