Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 112, NWS Aberdeen, SD

July 11, 1997Jones County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 11, 1997, 5:42 PM CDT for Jones 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: Jul 11, 1997, 5:42 PM CDT (22:42 UTC)
Expired: Jul 11, 1997, 6:15 PM CDT
In force: 33 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Jones County, SD

The radar

The Rapid City radar (KUDX), 172 km from the middle of the area, began a volume at 22:42 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

Rapid City, SD (KUNR), launched 12:00Z, 10.7 hours before the alert went out and 176 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: 1017 J/kg
Mixed-layer CIN: -301 J/kg
Mixed-layer LCL: 1583 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 31 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 Jul 11, 10:34 AM CDT, 7 hours 8 minutes earlier.

Area forecast discussion, Jul 11, 10:34 AM CDT, 7 hours 8 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
1030 AM CDT FRI JUL 11 1997

WILL UPDATE MOST ZONES TO FRESHEN UP WORDING.  MORNING SOUNDINGS DO
INDEED REVEAL LESS CAPPING OVER NE CWA AND SAT PIX IN COMBINATION WITH
88D REVEAL CONTD DEVELOPMENT OF WEAK CONVECTION WEST MO RIVER.  WILL
PROBABLY TAKE OUT LATE MENTION FOR SOME ZONES.  FORECAST BECOMING
COMPLICATED LATER PERIODS WITH S/WS LIFTING OUT OF SW US AND APPROACHING
TROF FROM WEST INCHING IN.  AT LEAST PER WATER VAPOR IMAGERY IT APPEARS
THAT ETA HAS FAIR HANDLE ON LOCATION OF S/WS COMING OUT OF SW US.  ALTHO
ITS SFC LOW OVER NEBRASKA PANHANDLE LOOKS A LITTLE OVERDOWN AT 24 HOURS.
MAIN SFC FRNT JUST BARELY INTO NW SD AND SUSPECT ITLL AWAIT A NUDGE FROM
THE WEST TNT BEFORE MOVING MUCH.

.ABR...NONE.
TDK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 8:24 PM CDT	Severe Thunderstorm Warning	ABR	Corson	31 min
Jul 11, 6:14 PM CDT	Severe Thunderstorm Warning	ABR	Jones	31 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.