Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 77, NWS Aberdeen, SD

June 28, 1997Grant County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 28, 1997, 11:46 PM CDT for Grant County, South Dakota. It was in force for 34 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: Jun 28, 1997, 11:46 PM CDT (04:46 UTC)
Expired: Jun 29, 1997, 12:20 AM CDT
In force: 34 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Grant County, SD

The radar

The Aberdeen radar (KABR), 132 km from the middle of the area, began a volume at 04:46 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

Aberdeen, SD (KABR), launched 00:00Z, 4.8 hours before the alert went out and 132 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: 2683 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1089 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KABR 290446 RRA
SVRABR
SDC051-290520-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
1146 PM CDT SAT JUN 28 1997

* SEVERE THUNDERSTORM WARNING FOR
  EASTERN GRANT COUNTY - NORTHEASTERN SOUTH DAKOTA

* UNTIL 1220 AM CDT
 
* SOME LOCATIONS AFFECTED
  RURAL AREAS TO THE EAST OF MILBANK

* AT 1143 PM CDT...ABERDEEN DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM WITH LARGE HAIL 39 MILES NORTHEAST OF WATERTOWN OR IN
  THE VICINITY OF BIG STONE CITY MOVING EAST AT 30 MPH.

THIS IS A DANGEROUS STORM! STAY INDOORS AWAY FROM WINDOWS.

GS/RB

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 Jun 28, 8:53 PM CDT, 2 hours 53 minutes earlier.

Area forecast discussion, Jun 28, 8:53 PM CDT, 2 hours 53 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
852 PM CDT SAT JUN 29 1997

THIS EVE SNDG SHWS CAP OF 3.0 WITH AMS CONTG TO BE VRY UNSTBL. CAP
SHUD SAVE US AGAIN FOR MOST OF THE NGT FRM ANY OUTBREAKS OVR ABR
CWA. 88D SHWS A BOUNDRY LINE...WHICH SHUD BE THE FNT...STRETCHING
THRU SE SD FRM STC MN TO VTN NE. A FEW TSTMS MAY POP UP ALONG THIS
LINE AS ONE DID JUST S OF BKX. BUT THIS IS OUTSIDE OF ABR CWA.
ANOTHER CELL POP UP JUST N OF ATY MOVG E. SHWS THAT THIS AREA NEEDS
SOME WATCHING. ANOTHER PROBLEM WITH OUR CWA IS THE TSTMS OVR NE WY.
THESE STORMS SHUD MOVE E TNGT AND MAY REJUVENATE OVR THE MSTR RICH\
& UNSTBL AIR OF N-CNTRL & CNTRL SD. IT DEPENDS ON WHETHER THE CAP
HOLDS.  SELS HAS CONT SD IN A SLGT RISK TNGT SO WIL KEEP TSTMS IN
FCST.  CRNT FCST SEEM TO ON TRACK & WILL NOT UPDATE ATTM.

.ABR...NONE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 10:02 PM CDT	Severe Thunderstorm Warning	ABR	Deuel	33 min
Jun 29, 4:01 AM CDT	Severe Thunderstorm Warning	ABR	Jones, Stanley	64 min
Jun 29, 6:23 PM CDT	Tornado Warning	ABR	Day	32 min
Jun 29, 6:57 PM CDT	Tornado Warning	ABR	Day	33 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.