Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 143, NWS Rapid City, SD

July 16, 2012Butte County, Harding County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jul 16, 2012, 5:04 PM MDT for Butte County, Harding County, South Dakota. It was in force for 41 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 16, 2012, 5:04 PM MDT (23:04 UTC)
Expired: Jul 16, 2012, 5:45 PM MDT
In force: 41 min
Issued by: NWS Rapid City, SD
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Butte County, SD, Harding County, SD

The radar

The Rapid City radar (KUDX), 135 km from the middle of the area, began a volume at 23:07 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 16, 2:53 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 11.1 hours before the alert went out and 139 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3356 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 67 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 Jul 16, 5:03 PM MDT, 1 minute earlier.

Area forecast discussion, Jul 16, 5:03 PM MDT, 1 minute before

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Hazardous weather outlook, Jul 16, 3:16 PM MDT, 1 hour 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RAPID CITY SD
316 PM MDT MON JUL 16 2012

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-171300-
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-
316 PM MDT (416 PM CDT) MON JUL 16 2012

...HEAT ADVISORY FOR CENTRAL SOUTH DAKOTA TODAY...

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

STRONG HIGH PRESSURE WILL PERSIST ACROSS THE REGION. THIS
WILL CONTINUE TO BRING TEMPERATURES WELL ABOVE AVERAGE TO THE AREA.
ACROSS CENTRAL SOUTH DAKOTA...MAXIMUM TEMPERATURES WILL BE OVER
100 DEGREES TODAY.

SCATTERED THUNDERSTORMS...SOME OF WHICH WILL BE SEVERE...ARE
POSSIBLE OVER NORTHWESTERN SOUTH DAKOTA THIS EVENING. THE MAIN
THREATS FROM THESE STORMS WILL BE DAMAGING WINDS AND LARGE HAIL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

A CHANCE OF THUNDERSTORMS EXISTS TUESDAY AND WEDNESDAY...AND AGAIN
THIS WEEKEND...BUT AT THIS TIME...WIDESPREAD SEVERE WEATHER IS NOT
EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

In the hours before

Local storm report, Jul 16, 4:06 PM MDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
406 PM MDT MON JUL 16 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0400 PM     TSTM WND GST     8 S BUFFALO             45.47N 103.55W
07/16/2012  E70 MPH          HARDING            SD   LAW ENFORCEMENT

            60 TO 70 MPH WINDS

&&

JJOHNSON

Local storm report, Jul 16, 4:08 PM MDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
408 PM MDT MON JUL 16 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0400 PM     HAIL             8 SW BUFFALO            45.50N 103.66W
07/16/2012  E1.50 INCH       HARDING            SD   PUBLIC

            HAIL RANGING FROM DIME TO PING PONG BALL COMPLETELY
            COVERING THE GROUND. WIND GUSTS OF 60 TO 70 MPH AND 1
            INCH OF RAIN.

0400 PM     TSTM WND GST     8 SW BUFFALO            45.50N 103.66W
07/16/2012  E70.00 MPH       HARDING            SD   PUBLIC

            HAIL RANGING FROM DIME TO PING PONG BALL COMPLETELY
            COVERING THE GROUND. WIND GUSTS OF 60 TO 70 MPH AND 1
            INCH OF RAIN.

&&

MSMITH

Local storm report, Jul 16, 4:09 PM MDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
409 PM MDT MON JUL 16 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0408 PM     HAIL             1 S BUFFALO             45.57N 103.55W
07/16/2012  E1.50 INCH       HARDING            SD   LAW ENFORCEMENT

&&

JJOHNSON

Local storm report, Jul 16, 4:23 PM MDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
423 PM MDT MON JUL 16 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0420 PM     HAIL             7 S BUFFALO             45.48N 103.55W
07/16/2012  E0.50 INCH       HARDING            SD   LAW ENFORCEMENT

            1 INCH OF ICE ON ROADS WITH THE HILLS AND GROUND
            COMPLETELY WHITE FROM THE HAIL.

&&

MSMITH

Special weather statement, Jul 16, 4:25 PM MDT, 39 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
425 PM MDT MON JUL 16 2012

SDZ002-162315-
PERKINS SD-
425 PM MDT MON JUL 16 2012

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN PERKINS COUNTY UNTIL 515
PM MDT...

AT 422 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR BISON...OR 29 MILES SOUTH OF LEMMON...MOVING
NORTHEAST AT 30 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  MEADOW...
  SHADEHILL RESERVOIR...
  SHADEHILL...

THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN
EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV
STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4561 10198 4551 10198 4550 10199 4540 10238
      4557 10253 4582 10218
TIME...MOT...LOC 2224Z 238DEG 25KT 4555 10235

BARBER

Local storm report, Jul 16, 4:35 PM MDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
435 PM MDT MON JUL 16 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0422 PM     HAIL             7 S BUFFALO             45.48N 103.55W
07/16/2012  E1.00 INCH       HARDING            SD   STORM CHASER

            MOST HAIL WAS LESS THAN 1 INCH BUT A FEW QUARTERS REMAIN.
            1/2 MILE STRETCH OF HWY 85 ABOUT 9 MILES SOUTH OF BUFFALO
            WAS COVERED WITH SMALL HAIL.

&&

MSMITH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 6:23 PM MDT	Special Weather Statement	UNR	Fall River, Oglala Lakota	67 min
Jul 16, 3:06 PM MDT	Severe Thunderstorm Warning	UNR	Harding	54 min
Jul 16, 3:48 PM MDT	Special Weather Statement	UNR	Perkins	42 min
Jul 16, 3:53 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Harding	67 min
Jul 16, 4:25 PM MDT	Special Weather Statement	UNR	Perkins	50 min
Jul 16, 4:40 PM MDT	Severe Thunderstorm Warning	UNR	Harding, Perkins	65 min
Jul 16, 4:53 PM MDT	Severe Thunderstorm Warning	UNR	Perkins, Ziebach	97 min
Jul 16, 5:56 PM MDT	Special Weather Statement	UNR	Perkins	49 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2012 Every severe thunderstorm warning in 2012

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.