Alert archive / South Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 15, NWS Sioux Falls, SD

May 7, 2000Brookings County, Kingsbury County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 7, 2000, 8:57 PM CDT for Brookings County, Kingsbury County, South Dakota. It was in force for 48 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: May 7, 2000, 8:57 PM CDT (01:57 UTC)
Expired: May 7, 2000, 9:45 PM CDT
In force: 48 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

Counties Brookings County, SD, Kingsbury County, SD

The radar

The Sioux Falls radar (KFSD), 93 km from the middle of the area, began a volume at 02:00 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
May 7, 9:00 PM CDT	Thunderstorm Wind 57 M	Arlington, SD	Thunderstorm winds caused tree damage. Trees greater than one foot in diameter were blown down.

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
May 7, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.0 hours before the alert went out and 116 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 807 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 410 m²/s²
0-3 km storm-relative helicity: 645 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.

000 
WUUS53 KFSD 080159
SVRFSD
SDC011-077-080245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
857 PM CDT SUN MAY 7 2000

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BROOKINGS COUNTY IN EAST CENTRAL SOUTH DAKOTA
  EASTERN KINGSBURY COUNTY IN EAST CENTRAL SOUTH DAKOTA

* UNTIL 945 PM CDT

* AT 857 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 2 MILES WEST OF HETLAND...OR ABOUT 25 MILES
  WEST OF BROOKINGS...MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ARLINGTON AROUND 905 PM CDT
  VOLGA AROUND 920 PM CDT
  BROOKINGS AROUND 925 PM CDT

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

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

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 Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at May 7, 3:20 PM CDT, 5 hours 37 minutes earlier.

Area forecast discussion, May 7, 3:20 PM CDT, 5 hours 37 minutes before

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
320 PM CDT SUN MAY 7 2000

SFC LOW DVLPG RAPIDLY IN NERN COLO AND IT WILL MOVE NEWD ALG STNY
FNT OVR SERN SD LATE TNGT AND MN MON. LOTS OF DYNAMICS...MOISTURE...
AND INSTABILITY TO WORK WITH...ESP ALG AND N OF FNT...AND WILL HIT
POPS HARD WITH CHC SVR TNGT IN ENTIRE CWA. FNT WILL SWEEP E OUT OF
CWA MON WITH LINGERING CHC OF MRNG SHWRS...BUT PROBABLY NOT AS STG
AS NGM. PRETTY STRAIGHTFORWARD FCST INTO TUE...BUT NEXT WAVE AND
RETURN FLOW SHOULD BRING CHC SHWRS/TSTMS INTO WRN CWA TUE AFTN AND
ENTIRE CWA TUE NGT AND WED...WITH NEXT ROUND EXPCD FOR THU NGT AND
FRI. WILL GO A LIT WARMER LOWS THAN GUID FOR EXTD WITH RETURN FLOW
AND MOISTURE EXPCD...BUT HIGHS LOOK OK FOR NOW.

.FSD...NONE
RYRHOLM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 7:37 PM CDT	Severe Thunderstorm Warning	FSD	Beadle	38 min
May 7, 8:06 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule	39 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.