Alert archive / South Dakota / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 91, NWS Rapid City, SD

June 21, 2003Butte County, Lawrence County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jun 21, 2003, 4:14 PM MDT for Butte County, Lawrence County, South Dakota. It was in force for 61 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 21, 2003, 4:14 PM MDT (22:14 UTC)
Expired: Jun 21, 2003, 5:15 PM MDT
In force: 61 min
Issued by: NWS Rapid City, SD
Area: Counties, with a storm outline in the text

Counties Butte County, SD, Lawrence 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
Jun 21, 1:10 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 10.2 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: 34 J/kg
Mixed-layer CIN: -373 J/kg
Mixed-layer LCL: 2468 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: -39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Rapid City, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 3:04 PM MDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jun 21, 3:04 PM MDT, 1 hour 10 minutes before

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
304 PM MDT SAT JUN 21 2003

MAIN CONCERN FOR NEXT COUPLE OF DAYS WILL BE SEVERE WX RISK AS
SERIES OF SHRTWVS AND SURF BOUNDARY LINGER ACROSS THE AREA. UPPER
LEVEL LOW OVER SOUTHERN AB WILL CONTINUE TO SPIN SHRTWV ENERGY
ACROSS THE NORTHERN ROCKIES AND NORTHERN PLAINS. RIGHT NOW...STRONG
TO SEVERE STORMS DEVELOPING ALONG THE SLOW MOVING FRONTAL BOUNDARY
ACROSS NORTHEAST WY AND NORTHWEST SD. LARGE HAIL IS THE MAIN
THREAT...BUT BRIEF TORNADO TOUCHDOWNS AND FUNNEL CLOUDS HAVE BEEN
REPORTED NEAR GCC WITH A STRONG SUPERCELL RIDING THE BOUNDARY.
STORMS ARE EXPECTED TO CONTINUE TO DEVELOP NEAR AND ALONG
THE FRONTAL BOUNDARY AS IT MOVES SLOWLY EAST LATE THIS AFT AND EVE.
OTHER STORMS WILL ALSO MOVE INTO THE AREA WITH ANOTHER SHRTWV MOVING
ACROSS SOUTHEASTERN WY.

FOR TOMORROW...BOUNDARY WILL STALL ACROSS THE DAKOTAS AND IS
EXPECTED TO RETROGRADE WESTWARD A BIT DURING THE DAY AND BE THE
FOCUS FOR MORE POTENTIALLY STRONG TO SEVERE THUNDERSTORMS DURING THE
AFT AND EVE. AREA FOR SEVERE WX POTENTIAL SHOULD BE FROM THE
BLACK HILLS AND EASTWARD.

UPPER LOW MOVES WELL NORTH OF REGION MONDAY...BUT ANOTHER UPPER
LEVEL SYSTEM MOVES INTO THE GREAT BASIN AREA AND CONTINUES TO BRING
WEAK DISTURBANCES ACROSS THE NORTHERN HIGH PLAINS. AS SYSTEM MOVES
CLOSER BY MIDWEEK...TEMPS WILL COOL TO BELOW NORMAL LEVELS TUE AND
WED. NOT BITING COMPLETELY ON VERY COOL GFS...BUT HAVE CONTINUED TO
TREND TEMPS DOWN A BIT. THE LATTER PART OF NEXT WEEK LOOKS DRY AND
PROGRESSIVELY WARMER AS WEAK RIDGING BUILDS INTO THE AREA.

.UNR...NONE.

ST

Hazardous weather outlook, Jun 21, 6:59 AM MDT, 9 hours 15 minutes before

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-221230-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RAPID CITY SD
659 AM MDT SAT JUN 21 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND
NORTHEASTERN WYOMING.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER NORTHEASTERN
WYOMING AND WESTERN SOUTH DAKOTA THIS AFTERNOON AND EVENING.
THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND CONTINUE INTO THE
EVENING. SOME STRONGER STORMS MAY BECOME ORGANIZED AND PRODUCE
SEVERE WEATHER. THE PRIMARY THREAT WILL BE HAIL LARGER THAN 3/4 INCH
DIAMETER.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A DAILY CHANCE FOR SHOWERS AND THUNDERSTORMS ARE EXPECTED SATURDAY
THROUGH THURSDAY AS A SERIES OF DISTURBANCES MOVES ACROSS THE
NORTHERN PLAINS. THERE IS A SLIGHT CHANCE FOR SEVERE STORMS SATURDAY
AS A COLD FRONT WILL BE MOVING THROUGH NORTHEAST WYOMING AND WESTERN
SOUTH DAKOTA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

99

In the hours before

Local storm report, Jun 21, 2:31 PM MDT, 1 hour 43 minutes before

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Local storm report, Jun 21, 2:36 PM MDT, 1 hour 38 minutes before

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Local storm report, Jun 21, 3:10 PM MDT, 1 hour 4 minutes before

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Local storm report, Jun 21, 3:42 PM MDT, 32 minutes before

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Local storm report, Jun 21, 3:58 PM MDT, 16 minutes before

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Local storm report, Jun 21, 4:14 PM MDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
414 PM MDT SAT JUN 21 2003

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

0335 PM    9 SW GLAD VLY             SD   1.25 INCH HAIL
06/21/03   ZIEBACH                        REPORTED BY STORM
                                          SPOTTER.

0400 PM    SUNDANCE                  WY   TORNADO
06/21/03   CROOK                          BRIEF AND WEAK TORNADO
                                          TOUCHDOWN AT MILE
                                          MARKER 185 ON
                                          INTERSTATE 90. REPORTED
                                          BY LAW ENFORCEMENT
                                          OFFICIAL.

0400 PM    4 SW FAITH                SD   1.75 INCH HAIL
06/21/03   MEADE                          REPORTED BY STORM
                                          SPOTTER.

0408 PM    FAITH                     SD   1.75 INCH HAIL
06/21/03   MEADE                          REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.

Bunkers

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 6:28 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	47 min
Jun 20, 6:41 PM MDT	Severe Thunderstorm Warning	UNR		49 min
Jun 20, 6:55 PM MDT	Severe Thunderstorm Warning	UNR	Meade	65 min
Jun 21, 1:49 PM MDT	Severe Thunderstorm Warning	UNR	Meade	56 min
Jun 21, 2:21 PM MDT	Severe Thunderstorm Warning	UNR	Butte	39 min
Jun 21, 2:34 PM MDT	Severe Thunderstorm Warning	UNR	Meade, Perkins	56 min
Jun 21, 3:22 PM MDT	Severe Thunderstorm Warning	UNR	Ziebach	53 min
Jun 21, 3:26 PM MDT	Severe Thunderstorm Warning	UNR	Meade	64 min
Jun 21, 4:08 PM MDT	Severe Thunderstorm Warning	UNR	Ziebach	67 min
Jun 21, 5:05 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Meade	55 min
Jun 21, 1:19 PM MDT	Severe Thunderstorm Warning	UNR	Campbell	56 min
Jun 21, 1:45 PM MDT	Tornado Warning	UNR	Campbell	30 min
Jun 21, 2:12 PM MDT	Severe Thunderstorm Warning	UNR	Campbell	63 min
Jun 21, 2:18 PM MDT	Tornado Warning	UNR	Campbell	57 min
Jun 21, 2:50 PM MDT	Tornado Warning	UNR	Crook	55 min
Jun 21, 3:40 PM MDT	Severe Thunderstorm Warning	UNR	Crook	65 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2003 Every severe thunderstorm warning in 2003

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.