Alert archive / South Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 177, NWS Sioux Falls, SD

August 5, 2000Davison County, Sanborn County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 5, 2000, 1:45 AM CDT for Davison County, Sanborn County, South Dakota. It was in force for 30 min. 4 reports 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: Aug 5, 2000, 1:45 AM CDT (06:45 UTC)
Expired: Aug 5, 2000, 2:15 AM CDT
In force: 30 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties Davison County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 115 km from the middle of the area, began a volume at 06:48 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 5, 1:50 AM CDT	Thunderstorm Wind 52 E	Letcher, SD	Thunderstorm winds caused tree damage and tipped over a grain wagon.
Aug 5, 1:53 AM CDT	Thunderstorm Wind 104 E	Mitchell, SD	A wet microburst with winds estimated at 120 mph caused heavy damage in and around Mitchell. Apartments and several mobile homes were destroyed, vehicles were overturned, and other damage occurred to buildings and vehicles. Widespread tree and power line damag
Aug 5, 2:00 AM CDT	Tornado F1	Mitchell, SD	A brief tornado damaged several structures.
Aug 5, 2:04 AM CDT	Hail 0.88	Mitchell, 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
Aug 4, 10:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 6.8 hours before the alert went out and 119 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: 2354 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFSD 050644
SVRFSD
SDC035-111-050715-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
145 AM CDT SAT AUG 5 2000

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN SANBORN COUNTY IN EAST CENTRAL SOUTH DAKOTA
  NORTHERN DAVISON COUNTY IN SOUTHEAST SOUTH DAKOTA

* UNTIL 215 AM CDT

* AT 145 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 9 MILES NORTHWEST OF LETCHER...OR ABOUT 21
  MILES NORTHWEST OF MITCHELL...MOVING SOUTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LETCHER AROUND 200 AM CDT
  LOOMIS AROUND 215 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 AWUAY FROM WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 11:29 PM CDT	Severe Thunderstorm Warning	FSD	Brule	31 min
Aug 4, 11:52 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	53 min
Aug 5, 12:42 AM CDT	Tornado Warning	FSD	Jerauld	33 min
Aug 5, 12:46 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	29 min
Aug 5, 1:07 AM CDT	Severe Thunderstorm Warning	FSD	Jerauld, Sanborn	38 min
Aug 5, 2:03 AM CDT	Severe Thunderstorm Warning	FSD	Hanson	27 min
Aug 5, 2:16 AM CDT	Severe Thunderstorm Warning	FSD	Davison	14 min
Aug 5, 2:30 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hanson	30 min
Aug 5, 4:41 AM CDT	Severe Thunderstorm Warning	FSD	Beadle	34 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2000 Every severe thunderstorm warning in 2000

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.