Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 180, NWS Aberdeen, SD

August 28, 2002Edmunds County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Aug 28, 2002, 2:50 PM CDT for Edmunds County, South Dakota. It was in force for 55 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 28, 2002, 2:50 PM CDT (19:50 UTC)
Expired: Aug 28, 2002, 3:45 PM CDT
In force: 55 min
Issued by: NWS Aberdeen, SD
Area: Counties, with a storm outline in the text

County Edmunds County, SD

The radar

The Aberdeen radar (KABR), 87 km from the middle of the area, began a volume at 19:52 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
Aug 28, 2:55 PM CDT	Hail 1	Hosmer, 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 7.8 hours before the alert went out and 108 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: 1363 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 969 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

719 
WUUS53 KABR 281950
SVRABR
SDC045-282045-
/NEW.KABR.SV.W.0280.281950-282045/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
250 PM CDT WED AUG 28 2002

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EDMUNDS COUNTY IN NORTH CENTRAL SOUTH DAKOTA

* UNTIL 345 PM CDT

* AT 250 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 13 MILES SOUTHWEST OF HOSMER...OR ABOUT 21
  MILES EAST OF SELBY...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HOSMER AROUND 320 PM CDT

THIS IS A DANGEROUS STORM. TAKE SHELTER NOW

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
ABERDEEN.

LAT...LON 4540 9970 4530 9962 4556 9912 4558 9953

MARSILI

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 28, 11:04 AM CDT, 3 hours 46 minutes earlier.

Area forecast discussion, Aug 28, 11:04 AM CDT, 3 hours 46 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/N-EAST SD AND W-CENTRAL MN
NATIONAL WEATHER SERVICE ABERDEEN SD
1104 AM CDT WED AUG 28 2002

CURRENTLY HAVE CONVECTION ALREADY OCCURRING IN WRN COUNTIES ALONG
WITH AN ISOLATED STORM IN THE EAST. EARLIER HAD SLIGHTLY MORE TSRA
IN ERN CWA BUT HAVE SINCE DISSIPATED. RUC AND MESOETA BOTH BRINGING
ANOTHER S/W ACROSS THE STATE TODAY. FEEL ANOTHER CHANCE FOR AN
ISOLATED TSRA MAY COME THIS AFTERNOON AS THE S/W MOVES OVER CWA BY
21Z. WITH MINIMAL CLOUD COVER ACROSS CENTRAL AND ERN CWA
ATTM...DAYTIME HEATING WILL HELP TO DESTABILIZE ATMOSPHERE ALONG
WITH SUFFICIENT MOISTURE ALREADY IN PLACE. CURRENT FCST LOOKS TO
HAVE A GOOD HANDLE ON CURRENT SITUATION WITH CHANCE OF TSRA...HIGH
TEMPS REACHING THE LOW TO MID 80S ACROSS CWA. NO UPDATE NEEDED AT
THIS TIME.

.ABR...NONE.

ALBRECHT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 7:44 AM CDT	Severe Thunderstorm Warning	ABR	Day, Marshall	46 min
Aug 28, 3:21 PM CDT	Severe Thunderstorm Warning	ABR	Faulk, Spink	24 min
Aug 28, 3:45 PM CDT	Severe Thunderstorm Warning	ABR	Brown, Spink	45 min
Aug 28, 4:38 PM CDT	Severe Thunderstorm Warning	ABR	Roberts	37 min
Aug 28, 5:15 PM CDT	Severe Thunderstorm Warning	ABR	Roberts	45 min
Aug 28, 5:36 PM CDT	Severe Thunderstorm Warning	ABR	Marshall	24 min
Aug 28, 5:57 PM CDT	Severe Thunderstorm Warning	ABR	Clark	33 min
Aug 28, 6:01 PM CDT	Severe Thunderstorm Warning	ABR	Roberts	44 min
Aug 28, 6:49 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds	41 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2002 Every severe thunderstorm warning in 2002

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.