Alert archive / South Dakota / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 310, NWS Rapid City, SD

July 30, 2013Butte County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 30, 2013, 1:38 PM MDT for Butte County, South Dakota. It was in force for 67 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: Jul 30, 2013, 1:38 PM MDT (19:38 UTC)
Expired: Jul 30, 2013, 2:45 PM MDT
In force: 67 min
Issued by: NWS Rapid City, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Butte County, SD

The radar

The Rapid City radar (KUDX), 102 km from the middle of the area, began a volume at 19:41 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
Jul 30, 1:27 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Rapid City, SD (KRAP), launched 12:00Z, 7.6 hours before the alert went out and 105 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: 796 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 858 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

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 Jul 30, 11:15 AM MDT, 2 hours 23 minutes earlier.

Area forecast discussion, Jul 30, 11:15 AM MDT, 2 hours 23 minutes before

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Hazardous weather outlook, Jul 30, 5:00 AM MDT, 8 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RAPID CITY SD
500 AM MDT TUE JUL 30 2013

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-311300-
BENNETT-BUTTE-CENTRAL BLACK HILLS-CUSTER CO PLAINS-FALL RIVER-HAAKON-
HARDING-HERMOSA FOOT HILLS-JACKSON-MELLETTE-NORTHEASTERN CROOK-
NORTHERN BLACK HILLS-NORTHERN CAMPBELL-NORTHERN FOOT HILLS-
NORTHERN MEADE CO PLAINS-PENNINGTON CO PLAINS-PERKINS-RAPID CITY-
SHANNON-SOUTHERN BLACK HILLS-SOUTHERN CAMPBELL-SOUTHERN FOOT HILLS-
SOUTHERN MEADE CO PLAINS-STURGIS/PIEDMONT FOOT HILLS-TODD-TRIPP-
WESTERN CROOK-WESTON-WYOMING BLACK HILLS-ZIEBACH-
500 AM MDT (600 AM CDT) TUE JUL 30 2013

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED TODAY AND TONIGHT. THERE IS A
SLIGHT RISK FOR SEVERE THUNDERSTORMS OVER WESTERN AND SOUTH CENTRAL
SOUTH DAKOTA INTO FAR NORTHEASTERN WYOMING. THE PRIMARY THREAT FROM
THESE STORMS WILL BE LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THERE IS A CHANCE OF THUNDERSTORMS OVER THE AREA ON WEDNESDAY.
HOWEVER...SEVERE WEATHER IS NOT EXPECTED.

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP THURSDAY AFTERNOON
AND EVENING. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER
PORTIONS OF NORTHEASTERN WYOMING AND SOUTHWESTERN SOUTH DAKOTA...
WITH LARGE HAIL AND DAMAGING WIND GUSTS BEING THE PRIMARY THREATS.

CHANCES FOR THUNDERSTORMS CONTINUE THROUGH MONDAY WITH WIDESPREAD
SEVERE THUNDERSTORMS NOT EXPECTED AT THIS TIME. HOWEVER...ISOLATED
SEVERE WEATHER WILL BE POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

&&

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...
OR CHECK OUR WEB SITE AT WEATHER.GOV/RAPIDCITY

In the hours before

Special weather statement, Jul 30, 8:33 AM MDT, 5 hours 5 minutes before

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Special weather statement, Jul 30, 1:26 PM MDT, 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
126 PM MDT TUE JUL 30 2013

SDZ001-012-302015-
BUTTE SD-HARDING SD-
126 PM MDT TUE JUL 30 2013

...STRONG THUNDERSTORM MOVING OVER FAR NORTHERN BUTTE AND SOUTHERN
HARDING COUNTIES UNTIL 215 PM MDT...

AT 123 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 5 MILES SOUTHWEST OF REDIG...OR 26 MILES SOUTH OF
BUFFALO...MOVING EAST-SOUTHEAST AT 15 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS STORM.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  HOOVER...

THIS STORM MAY INTENSIFY OVER THE NEXT HOUR.

&&

LAT...LON 4530 10343 4521 10316 4509 10326 4498 10346
      4512 10368 4521 10378 4532 10366
TIME...MOT...LOC 1926Z 291DEG 12KT 4520 10358

BUNKERS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 11:29 PM MDT	Special Weather Statement	UNR	Fall River	46 min
Jul 30, 1:26 PM MDT	Special Weather Statement	UNR	Butte	49 min
Jul 30, 1:58 PM MDT	Special Weather Statement	UNR	Meade	47 min
Jul 30, 2:19 PM MDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	56 min
Jul 30, 2:23 PM MDT	Special Weather Statement	UNR	Pennington	52 min
Jul 30, 2:33 PM MDT	Severe Thunderstorm Warning	UNR	Mellette	57 min
Jul 30, 2:40 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Meade	50 min
Jul 30, 2:45 PM MDT	Tornado Warning	UNR	Meade, Pennington	30 min
Jul 30, 2:48 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	57 min
Jul 30, 2:57 PM MDT	Severe Thunderstorm Warning	UNR	Todd	33 min
Jul 30, 3:07 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Pennington	53 min
Jul 30, 3:22 PM MDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	68 min
Jul 30, 3:23 PM MDT	Severe Thunderstorm Warning	UNR	Meade	52 min
Jul 30, 3:30 PM MDT	Severe Thunderstorm Warning	UNR	Jackson, Pennington	60 min
Jul 30, 3:54 PM MDT	Severe Thunderstorm Warning	UNR	Jackson, Mellette	66 min
Jul 30, 4:06 PM MDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	39 min
Jul 30, 4:20 PM MDT	Special Weather Statement	UNR		40 min
Jul 30, 4:39 PM MDT	Special Weather Statement	UNR	Butte	51 min
Jul 30, 4:46 PM MDT	Special Weather Statement	UNR	Jackson	44 min
Jul 30, 4:49 PM MDT	Severe Thunderstorm Warning	UNR	Mellette, Todd	56 min
Jul 30, 5:01 PM MDT	Special Weather Statement	UNR	Butte	59 min
Jul 30, 5:06 PM MDT	Areal Flood Advisory	UNR	Mellette, Todd	6 hr
Jul 30, 5:10 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Harding	65 min
Jul 30, 5:40 PM MDT	Special Weather Statement	UNR	Fall River	50 min
Jul 30, 5:42 PM MDT	Severe Thunderstorm Warning	UNR	Todd	63 min
Jul 30, 3:27 PM MDT	Special Weather Statement	UNR	Campbell	48 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2013 Every severe thunderstorm warning in 2013

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.