Alert archive / South Dakota / Tornado Warnings in 2000

Tornado Warning 10, NWS Rapid City, SD

July 24, 2000Tripp County, South Dakota

NWS Rapid City, SD issued this tornado warning at Jul 24, 2000, 6:25 PM CDT for Tripp County, South Dakota. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jul 24, 2000, 6:25 PM CDT (23:25 UTC)
Expired: Jul 24, 2000, 7:15 PM CDT
In force: 50 min
Issued by: NWS Rapid City, SD
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Tripp County, SD

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 24, 5:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.4 hours before the alert went out and 223 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: 1511 J/kg
Mixed-layer CIN: -363 J/kg
Mixed-layer LCL: 1652 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KUNR 242326
TORRAP

SDC123-250015-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE RAPID CITY SD
625 PM CDT MON JUL 24 2000

THE NATIONAL WEATHER SERVICE IN RAPID CITY SD HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN TRIPP COUNTY IN SOUTH CENTRAL SOUTH DAKOTA

* UNTIL 715 PM CDT

* AT 625 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADIC THUNDERSTORM 3 MILES WEST OF CLEARFIELD...OR ABOUT 18
  MILES SOUTHWEST OF WINNER...MOVING SOUTH AT 15 MPH.

* SOME LOCATIONS AFFECTED
  CLEARFIELD AROUND 630 PM CDT
  KEYAPAHA AROUND 645 PM CDT
  MILLBORO AROUND 650 PM CDT

MOVE QUICKLY TO A STURDY INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. ABANDON YOUR CAR OR MOBILE HOME FOR A STRONGER
SHELTER.

THIS WARNING EXTENDS THE TORNADO WARNING PREVIOUSLY ISSUED FOR THE
AREA.

LAT...LON 4328 9998 4327 10022 4282 10025 4283 9991

HELGESON

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Rapid City, SD wrote its last area forecast discussion before this tornado warning went out at Jul 24, 3:45 PM CDT, 2 hours 40 minutes earlier.

Area forecast discussion, Jul 24, 3:45 PM CDT, 2 hours 40 minutes before

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
245 PM MDT MON JUL 24 2000

SFC RIDGE TO BUILD IN AND TO THE E TODAY WILL MAKE FOR QUIET WX. BY
TONIGHT...SFC RIDGE PUSHES FAR ENOUGH E TO SET UP RETURN FLOW OVR
ERN WY AND WRN SD. THIS COUPLED WITH H7 WAA MAY BE ENOUGH TO TRIGGER
A FEW STORMS IN THESE LOCATIONS...SO MENTIONED ISOLD -TSRA THERE. BY
WED AFTERNOON MDLS PROG ENOUGH H20 TO HAVE MADE IT BACK TO THE AREA
FOR LESS OF A CAP AND RESPECTABLE CAPE. THIS COUPLED WITH A WEAK YET
ADEQUATE WAVE MOVING THROUGH WY WILL COMBINE TO PRODUCE THE BEST CHC
OF PRECIP OUT OF THE NEXT 48 HRS WED AFTERNOON AND EVENING. WITH
LLVL MOISTURE A LITTLE LACKING IN THE W...PRECIP AMOUNTS IN THE W
WILL BE LOW AS EVAP HOGS ALOT OF IT. NUMERICAL TEMP GUIDANCE HAS
BEEN VERY GOOD THE LAST SEVERAL DAYS AND HAVE GENERALLY FOLLOWED IT AGAIN
WITH A BIAS TOWARDS FWC AND ETA SOUNDINGS IN SOME LOCATIONS.

.UNR...NONE.
BAILEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 12:48 AM CDT	Severe Thunderstorm Warning	UNR	Harding	57 min
Jul 24, 5:28 PM CDT	Severe Thunderstorm Warning	UNR	Tripp	32 min
Jul 24, 5:45 PM CDT	Tornado Warning	UNR	Todd, Tripp	45 min
Jul 24, 6:42 PM CDT	Severe Thunderstorm Warning	UNR	Todd	28 min

Nearby

Tornado Warnings in South Dakota, 2000 Every tornado warning in 2000 Tornadoes 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; the sounding from the Mesonet's radiosonde archive.