Alert archive / South Dakota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 12, NWS Aberdeen, SD

June 6, 2001Dewey County, South Dakota

NWS Aberdeen, SD issued this severe thunderstorm warning at Jun 6, 2001, 8:29 AM MDT for Dewey County, South Dakota. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 6, 2001, 8:29 AM MDT (14:29 UTC)
Expired: Jun 6, 2001, 9:00 AM MDT
In force: 31 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 14:31 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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 2.5 hours before the alert went out and 180 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: 156 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 729 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 189 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KABR 061428
SVRABR
SDC041-061500-
/NEW.KABR.SV.W.0040.061427-061500/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
829 AM MDT WED JUN 6 2001

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

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

* UNTIL 900 AM MDT

* AT 827 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES NORTHWEST OF LAPLANT...OR ABOUT 28
  MILES NORTHEAST OF EAGLE BUTTE...MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER...
  RURAL DEWEY COUNTY SOUTH OF PROMISE THROUGH 900 AM MDT

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM WINDOWS.

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

$$
LAT...LON 4530 10077 4510 10071 45i15 10030 4537 10033

PARKIN

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 6, 2:15 AM MDT, 6 hours 14 minutes earlier.

Area forecast discussion, Jun 6, 2:15 AM MDT, 6 hours 14 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTHCENTRAL AND NORTHEAST
SOUTH DAKOTA AND WEST CENTRAL MINNESOTA
NATIONAL WEATHER SERVICE ABERDEEN SD
315 AM CDT WED JUN 6 2001

MAIN PROBLEM THIS MORNING IS PRECIPITATION MOVING INTO AREA TODAY.
MODELS AGREEING WELL ON MAJOR FEATURES...THOUGH DO SHOW SOME MINOR
DIFFERENCES IN TIMING AND AMOUNTS OF PRECIP. LOOK FOR SHOWERS TO
START IN WESTERN CWA BY MID MORNING...THEN MOVING EAST. SAT NOT
SHOWING A STRONG MSTR PUSH...WHICH AGREES WELL WITH RH ON PROGS.
NONE SHOWING REAL GOOD MSTR ADVECTION...AND THAT CUTTING OFF RAPIDLY
AS THE SW MOVES THROUGH. LOOKS LIKE NVA...DRYER AIR STARTING INTO SW
COUNTIES BY NOON. BEST CHANCE OF THUNDERSTOMS APPEARS TO BE OVER
EASTERN CWA AS HEATING AND LIFT COMBINE IN AFTERNOON. LI DROPPING TO
-6 OVER CENTRAL ZONES BY AFTERNOON. EXPECT ACTIVITY TO TAPER OFF IN
EASTERN ZONES BY MIDNIGHT...WITH POTENTIAL FOR FOG AS CLDS BREAK.

TEMPS SIMILAR ON ALL MODELS...SO BLENDED GUIDANCE. WINDS LOOKING
PRETTY LIGHT AS THIS SYSTEM MOVES THROUGH. MESOETA 925 FLOW
SOUTHEAST WITH MAX OF 20KTS THIS AFTERNOON.

LOOK FOR IMPROVING CONDS THURS AS UPPER RDG BEGINS BLDG BACK IN WITH
NORTHWEST FLOW. SW XMOVG DOWN RDG THURS EVENING...BUT NO MSTR TO WORK
WITH SO DONT EXPECT ANY ACTIVITY TO DEVELOP.

.ABR...NONE.

MARSHALL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 9:06 AM MDT	Severe Thunderstorm Warning	ABR	Dewey, Walworth	24 min
Jun 6, 10:24 AM MDT	Severe Thunderstorm Warning	ABR	Potter, Walworth	51 min
Jun 6, 11:06 AM MDT	Severe Thunderstorm Warning	ABR	Edmunds	54 min
Jun 6, 2:39 PM MDT	Severe Thunderstorm Warning	ABR	Spink	66 min
Jun 6, 4:41 PM MDT	Severe Thunderstorm Warning	ABR	Spink	49 min
Jun 6, 5:28 PM MDT	Severe Thunderstorm Warning	ABR	Clark, Spink	62 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.