Alert archive / South Dakota / Tornado Warnings in 1998

Tornado Warning 14, NWS Rapid City, SD

June 22, 1998Butte County, Lawrence County, South Dakota

NWS Rapid City, SD issued this tornado warning at Jun 22, 1998, 8:04 PM MDT for Butte County, Lawrence County, South Dakota. It was in force for 46 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 22, 1998, 8:04 PM MDT (02:04 UTC)
Expired: Jun 22, 1998, 8:50 PM MDT
In force: 46 min
Issued by: NWS Rapid City, SD
Area: Whole counties

Counties Butte County, SD, Lawrence County, SD

The radar

The Rapid City radar (KUDX), 86 km from the middle of the area, began a volume at 02:08 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jun 22, 7:45 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 2.1 hours before the alert went out and 88 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: 610 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 2011 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 575 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 18.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jun 22, 9:02 AM MDT, 11 hours 2 minutes earlier.

Area forecast discussion, Jun 22, 9:02 AM MDT, 11 hours 2 minutes before

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
900 AM MDT MON JUNE 22 1998

MORNING FORECAST PACKAGE LOOKS ON TRACK AND SEE NO REASONS TO UPDATE.
TEMPS ARE CLIMBING QUICKLY BUT CONVECTIVE TEMPERATURES ARE IN THE LOWER
70S. AIR MASS WILL MIX QUICKLY AND COVECTION SHOULD START FORMING CU BY
18Z AND EXPECT SCATTERED TSRA BY 20 TO 21Z...MOST PRONOUNCED OVER BLACK
HILLS. SEVERE POTENTIAL LOOKS GOOD WITH 94O IN PLACE AND SLIGHT RISK
AREA AS WELL. WILL ISSUE AN SPS AND MENTION MOST LIKELY THREAT TO BE
HAIL AND STRONG WINDS AS LAPSE RATES STEEPEN.  FORECAST SHEAR PROFILE
AND HELICITY OF 256 OVER SOUTH CENTRAL WOULD SUPPORT POTENTIAL FOR AN
ISOLATED TORNADO...BUT WILL NOT MENTION IN SPS.

SPECI KUNR 221500Z 16013KT P6SM  SKC 19/13 FEW AC DSNT SW-W

.UNR...NONE.

SEARLES

In the hours before

Local storm report, Jun 22, 5:17 PM MDT, 2 hours 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
517 PM MDT MON JUN 22 1998

TIME(MDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0450 PM    WESTON                    WY    1 INCH HAIL
06/22/98   CAMPBELL

0450 PM    WESTON                    WY    60 MPH TSTM GUST
06/22/98   CAMPBELL

0455 PM    10 NE WESTON              WY    1.75 INCH HAIL
06/22/98   CAMPBELL

Local storm report, Jun 22, 5:17 PM MDT, 2 hours 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
517 PM MDT MON JUN 22 1998

TIME(MDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0450 PM    WESTON                    WY    1 INCH HAIL
06/22/98   CAMPBELL

0450 PM    WESTON                    WY    60 MPH TSTM GUST
06/22/98   CAMPBELL

0455 PM    10 NE WESTON              WY    1.75 INCH HAIL
06/22/98   CAMPBELL

Local storm report, Jun 22, 7:24 PM MDT, 40 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 1:00 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence	35 min
Jun 23, 1:41 PM MDT	Severe Thunderstorm Warning	UNR	Meade	19 min
Jun 23, 4:33 PM MDT	Severe Thunderstorm Warning	UNR	Jackson	32 min
Jun 23, 4:38 PM MDT	Severe Thunderstorm Warning	UNR	Meade	32 min
Jun 23, 5:05 PM MDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	50 min
Jun 23, 5:20 PM MDT	Severe Thunderstorm Warning	UNR	Meade	35 min
Jun 23, 5:52 PM MDT	Severe Thunderstorm Warning	UNR	Meade	48 min
Jun 23, 5:55 PM MDT	Severe Thunderstorm Warning	UNR	Mellette	50 min
Jun 23, 5:57 PM MDT	Tornado Warning	UNR	Meade	33 min
Jun 22, 6:32 PM MDT	Tornado Warning	UNR	Crook	48 min
Jun 22, 6:46 PM MDT	Tornado Warning	UNR	Campbell	49 min
Jun 22, 7:50 PM MDT	Severe Thunderstorm Warning	UNR	Crook	60 min
Jun 23, 4:44 PM MDT	Severe Thunderstorm Warning	UNR	Crook	36 min

Nearby

Tornado Warnings in South Dakota, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.