Alert archive / South Dakota / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 82, NWS Aberdeen, SD

June 30, 1997Dewey County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 30, 1997, 6:00 AM MDT for Dewey County, South Dakota. It was in force for 30 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 30, 1997, 6:00 AM MDT (12:00 UTC)
Expired: Jun 30, 1997, 6:30 AM MDT
In force: 30 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 11:59 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 30, 6:00 AM MDT	Hail 0.88	Eagle Butte, 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 nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 0.0 hours before the alert went out and 196 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: 224 J/kg
Mixed-layer CIN: -189 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KABR 301200 RRA
SVRABR
SDC041-301230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
700 AM CDT MON JUN 30 1997

* SEVERE THUNDERSTORM WARNING FOR
  DEWEY COUNTY - NORTH CENTRAL SOUTH DAKOTA

* UNTIL 630 AM MDT (730 AM CDT)
 
* SOME LOCATIONS AFFECTED
  GREEN GRASS
  LA PLANT
  RIDGEVIEW

* AT 557 AM MDT...ABERDEEN DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM JUST SOUTHEAST OF WHITEHORSE AND NEAR GREEN GRASS.
  STORMS ARE MOVING EAST AT 45 MPH.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

TDK/DEE

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 29, 8:21 PM MDT, 9 hours 39 minutes earlier.

Area forecast discussion, Jun 29, 8:21 PM MDT, 9 hours 39 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTH CENTRAL/NORTHEAST SD
AND FOR TRAVERSE/BIG STONE COUNTIES OF MN
NATIONAL WEATHER SERVICE ABERDEEN SD
920 PM CDT SUN JUN 30 1997

SEVERAL OUTFLOW BOUNDRIES FORM PREVIOUS MCS ARE MOVG THRU THE CWA
ATTM WHICH HAD TRIGGERED OFF A FEW TSTMS. THESE STORMS HAS WEAKEN
AND WILL BE ALL BUT GONE BY SUN SET. THIS SHUD LEAVE P/CLDY SKIES
FOR THE REST OF THE NIGHT & WILL UPDATE TO REMOVE PRECIP.

.ABR...NONE

In the hours before

Local storm report, Jun 30, 5:24 AM MDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
624 AM CDT MON JUN 30 1997

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0620 AM    MCLAUGHLIN                SD   61 MPH WIND GUST
06/30/97   CORSON

DEE

Local storm report, Jun 30, 5:36 AM MDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
636 AM CDT MON JUN 30 1997

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0635 AM    MOBRIDGE                  SD   69 MPH WIND GUST
06/30/97   WALWORTH                       RECORDED AT THE WATER
                                          PLANT

END

Local storm report, Jun 30, 5:37 AM MDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  ABERDEEN SD
636 AM CDT MON JUN 30 1997

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0635 AM    MOBRIDGE                  SD   69 MPH WIND GUST
06/30/97   WALWORTH                       RECORDED AT THE WATER
                                          PLANT

END

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 6:34 PM MDT	Severe Thunderstorm Warning	ABR	Corson	61 min
Jun 30, 4:58 AM MDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	62 min
Jun 30, 5:29 AM MDT	Severe Thunderstorm Warning	ABR	Campbell, Walworth	61 min
Jun 30, 6:10 AM MDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	50 min
Jun 30, 6:29 AM MDT	Severe Thunderstorm Warning	ABR	Dewey, Potter	61 min
Jun 30, 7:13 AM MDT	Severe Thunderstorm Warning	ABR	Sully	47 min
Jun 30, 8:08 AM MDT	Severe Thunderstorm Warning	ABR	Hyde	62 min
Jun 30, 8:16 AM MDT	Severe Thunderstorm Warning	ABR	Hyde	54 min
Jun 30, 8:30 AM MDT	Severe Thunderstorm Warning	ABR	Hand	50 min
Jun 30, 5:28 PM MDT	Severe Thunderstorm Warning	ABR	Jones, Lyman	57 min
Jun 30, 5:38 PM MDT	Severe Thunderstorm Warning	ABR	Hughes, Stanley	62 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.