Alert archive / South Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 149, NWS Sioux Falls, SD

July 10, 2002Yankton County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 10, 2002, 1:36 AM CDT for Yankton County, South Dakota. It was in force for 24 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
Jul 10, 2002, 1:36 AM CDT (06:36 UTC)
Expired
Jul 10, 2002, 2:00 AM CDT
In force
24 min
Issued by
NWS Sioux Falls, SD
Area
Counties, with a storm outline in the text

County Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 82 km from the middle of the area, began a volume at 06:39 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

TimeReportWhereRemark
Jul 10, 1:40 AM CDTHail 0.75Lesterville, 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

Omaha, NE (KOAX), launched 00:00Z, 6.6 hours before the alert went out and 213 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2002-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2865 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2002-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2865 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1846 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.4

Open this sounding in Storm Lab

The text

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

568 
WUUS53 KFSD 100636
SVRFSD
SDC135-100700-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
135 AM CDT WED JUL 10 2002

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  YANKTON COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 200 AM CDT

* AT 135 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTH OF UTICA...OR ABOUT 12 MILES   
  NORTHWEST OF YANKTON...MOVING EAST AT 30 MPH. ANOTHER SEVERE 
  THUNDERSTORM WAS IN SOUTHEAST BOM HOMME COUNTY MOVING TO THE EAST. 
  THIS WILL MOVE INTO SOUTHWEST YANKTON COUNTY. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MAYFIELD AROUND 150 AM CDT

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE 
FOR DAMAGING WINDS IN EXCESS OF 58 MPH...LARGE HAIL...HEAVY RAINS AND
DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A 
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 4312 9763 4294 9758 4298 9717 4317 9722

BOUSTEAD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 7:51 PM CDTSevere Thunderstorm WarningFSDBrule, Charles Mix39 min
Jul 9, 8:21 PM CDTSevere Thunderstorm WarningFSDCharles Mix, Gregory39 min
Jul 9, 8:59 PM CDTSevere Thunderstorm WarningFSDBon Homme, Charles Mix46 min
Jul 9, 9:16 PM CDTSevere Thunderstorm WarningFSDHutchinson44 min
Jul 9, 9:28 PM CDTSevere Thunderstorm WarningFSDCharles Mix32 min
Jul 9, 9:42 PM CDTSevere Thunderstorm WarningFSDYankton48 min
Jul 9, 9:48 PM CDTSevere Thunderstorm WarningFSDBon Homme27 min
Jul 9, 10:00 PM CDTSevere Thunderstorm WarningFSDTurner45 min
Jul 9, 10:13 PM CDTSevere Thunderstorm WarningFSDMcCook47 min
Jul 10, 1:10 AM CDTSevere Thunderstorm WarningFSDBon Homme35 min
Jul 10, 3:03 AM CDTFlash Flood WarningFSDLincoln, Minnehaha87 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2002Every 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.