Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 28, NWS Aberdeen, SD

June 20, 1997Stanley County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 20, 1997, 12:34 AM MDT for Stanley County, South Dakota. It was in force for 31 min. 1 report 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: Jun 20, 1997, 12:34 AM MDT (06:34 UTC)
Expired: Jun 20, 1997, 1:05 AM MDT
In force: 31 min
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Stanley County, SD

The radar

The Rapid City radar (KUDX), 170 km from the middle of the area, began a volume at 06:34 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
Jun 20, 1:00 AM MDT	Thunderstorm Wind 61	Wendte, 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
Jun 19, 11:00 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 6.6 hours before the alert went out and 175 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: 967 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1078 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 245 m²/s²
Significant tornado parameter: 0.6
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 200633 RRA
SVRABR
SDC117-200705-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
134 AM CDT (1234 AM MDT) FRI JUN 20 1997

* SEVERE THUNDERSTORM WARNING FOR
  WESTERN STANLEY COUNTY - CENTRAL SOUTH DAKOTA

* UNTIL 105 AM MDT (205 AM CDT)
 
* SOME LOCATIONS AFFECTED
  HAYES                               AROUND 1240 AM MDT
  WENDTE                              AROUND 1255 AM MDT

* AT 1231 AM MDT...ABERDEEN DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 40 MILES WEST OF PIERRE OR 20 MILES WEST OF WENDTE
  MOVING EAST AT 40 MPH.

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

BROYLES/GUERRERO

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 19, 7:41 PM MDT, 4 hours 53 minutes earlier.

Area forecast discussion, Jun 19, 7:41 PM MDT, 4 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
845 PM CDT THU JUN 19 1997

THUNDERSTORM STILL A POSSIBILITY IN NORTHEAST SD AND WEST CENTRAL MN
THRU THE REST OF THE EVENING. ELSEWHERE...THUNDERSTORM THREAT APPEARS TO
HAVE ENDED ACROSS OUR CWA.  WILL UPDATE OUR ZONES TO REFLECT THIS AND
MAKE A FEW COSMETIC CHANGES.

.ABR...NONE

TALLMAN

In the hours before

Special weather statement, Jun 20, 12:18 AM MDT, 16 minutes before

MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-201120-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
118 AM CDT (1218 AM MDT) FRI JUN 20 1997

...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR CENTRAL SOUTH
DAKOTA UNTIL 500 AM CDT...
...SEVERE THUNDERSTORM WATCH FOR BIG STONE AND TRAVERSE COUNTY HAS
EXPIRED...

STRONG TO SEVERE THUNDERSTORM ARE POSSIBLE THROUGH THE EARLY
MORNING HOURS FOR CENTRAL SOUTH DAKOTA.

SOME OF THESE STORMS MAY PRODUCE LARGE HAIL AND DAMAGING WINDS.

HG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 8:47 PM MDT	Severe Thunderstorm Warning	ABR	Roberts	48 min
Jun 19, 9:34 PM MDT	Severe Thunderstorm Warning	ABR	Lyman	46 min
Jun 19, 10:03 PM MDT	Severe Thunderstorm Warning	ABR	Buffalo	62 min
Jun 19, 10:22 PM MDT	Severe Thunderstorm Warning	ABR	Lyman	48 min
Jun 19, 10:41 PM MDT	Severe Thunderstorm Warning	ABR	Hand	49 min
Jun 20, 12:13 AM MDT	Severe Thunderstorm Warning	ABR	Jones, Lyman	32 min
Jun 20, 12:53 AM MDT	Severe Thunderstorm Warning	ABR	Jones	47 min
Jun 20, 12:54 AM MDT	Severe Thunderstorm Warning	ABR	Jones, Stanley	46 min
Jun 20, 1:05 AM MDT	Severe Thunderstorm Warning	ABR	Hughes, Lyman	45 min
Jun 20, 1:22 AM MDT	Severe Thunderstorm Warning	ABR	Jones	33 min
Jun 20, 1:47 AM MDT	Severe Thunderstorm Warning	ABR	Stanley	28 min
Jun 20, 1:47 AM MDT	Severe Thunderstorm Warning	ABR	Buffalo, Hyde	28 min
Jun 20, 1:52 AM MDT	Severe Thunderstorm Warning	ABR	Hughes, Lyman	63 min
Jun 20, 1:55 AM MDT	Severe Thunderstorm Warning	ABR	Jones	65 min
Jun 20, 2:14 AM MDT	Severe Thunderstorm Warning	ABR	Buffalo	31 min
Jun 20, 2:56 AM MDT	Severe Thunderstorm Warning	ABR	Lyman	49 min
Jun 20, 3:05 AM MDT	Severe Thunderstorm Warning	ABR	Jones	65 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.