Alert archive / South Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 129, NWS Rapid City, SD

June 26, 2011Haakon County, Ziebach County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Jun 26, 2011, 11:09 AM MDT for Haakon County, Ziebach County, South Dakota. It was in force for 43 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 26, 2011, 11:09 AM MDT (17:09 UTC)
Expired
Jun 26, 2011, 11:52 AM MDT
In force
43 min
Issued by
NWS Rapid City, SD
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

Counties Haakon County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 113 km from the middle of the area, began a volume at 17:11 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.

IssuedProductOfficeLasted
Mar 3, 10:24 PM MSTSevere Thunderstorm WatchSPC157 days

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 5.2 hours before the alert went out and 120 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-pSkew-T log-p diagram, Rapid City, SD at 12:00Z on 2011-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 277 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 12:00Z on 2011-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 159 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
277 J/kg
Mixed-layer CIN
-195 J/kg
Mixed-layer LCL
837 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
159 m²/s²
0-3 km storm-relative helicity
281 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 Jun 26, 10:36 AM MDT, 33 minutes earlier.

Area forecast discussion, Jun 26, 10:36 AM MDT, 33 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Jun 26, 8:30 AM MDT, 2 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RAPID CITY SD
830 AM MDT SUN JUN 26 2011

SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058-
071-271300-
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-
830 AM MDT (930 AM CDT) SUN JUN 26 2011

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

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE AGAIN EXPECTED OVER THE AREA TODAY INTO THIS
EVENING. THERE IS A SLIGHT RISK THAT SOME OF THESE STORMS MAY BECOME
SEVERE. LARGE HAIL WILL BE THE MAIN THREAT...THOUGH DAMAGING WIND
GUSTS WILL ALSO BE POSSIBLE. THERE WILL ALSO BE A TORNADIC THREAT IN
THE AFTERNOON INTO THE EARLY EVENING HOURS...PARTICULARLY OVER
SOUTHWEST INTO SOUTH CENTRAL SOUTH DAKOTA.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

CHANCES FOR THUNDERSTORMS RETURN FOR WEDNESDAY NIGHT INTO
THURSDAY ...THOUGH AT THIS TIME WIDESPREAD SEVERE WEATHER IS NOT
EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY...ESPECIALLY SOUTH AND EAST
OF THE BLACK HILLS.

In the hours before

Special weather statement, Jun 26, 6:20 AM MDT, 4 hours 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
620 AM MDT SUN JUN 26 2011

SDZ031-042-043-261300-
JACKSON SD-PENNINGTON CO PLAINS SD-SHANNON SD-
620 AM MDT SUN JUN 26 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN PENNINGTON...
NORTHWESTERN JACKSON AND NORTHEASTERN SHANNON COUNTIES UNTIL 700 AM
MDT...

AT 618 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 12 MILES WEST OF INTERIOR...OR 37 MILES WEST OF
KADOKA...MOVING NORTHEAST AT 40 MPH.

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

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  INTERIOR...
  CEDAR PASS...
  MINUTEMAN MISSILE SITE...
  CACTUS FLAT...
  COTTONWOOD...

THIS INCLUDES INTERSTATE 90 BETWEEN SOUTH DAKOTA MILE MARKERS 122 AND
144...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

RUDGE
Local storm report, Jun 26, 6:30 AM MDT, 4 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
630 AM MDT SUN JUN 26 2011

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

1030 PM     HEAVY RAIN       1 SW DOWNTOWN STURGIS   44.40N 103.53W
06/25/2011  M2.20 INCH       MEADE              SD   TRAINED SPOTTER

            1/4 TO 1/2 INCH HAIL MIXED IN.

&&

WFO UNR STAFF
Local storm report, Jun 26, 11:04 AM MDT, 5 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
1104 AM MDT SUN JUN 26 2011

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

0420 AM     TSTM WND GST     5 E PORCUPINE           43.24N 102.23W
06/26/2011  E60 MPH          SHANNON            SD   TRAINED SPOTTER

0315 AM     TSTM WND GST     5 SSW LUDLOW            45.77N 103.43W
06/26/2011  E60 MPH          HARDING            SD   TRAINED SPOTTER

0848 AM     TSTM WND GST     1 N ROCKYFORD           43.51N 102.50W
06/26/2011  E60 MPH          SHANNON            SD   TRAINED SPOTTER

0848 AM     HAIL             1 N ROCKYFORD           43.51N 102.50W
06/26/2011  E1.00 INCH       SHANNON            SD   TRAINED SPOTTER

0405 AM     TSTM WND GST     6 E RALPH               45.79N 102.94W
06/26/2011  E60 MPH          PERKINS            SD   TRAINED SPOTTER

0943 AM     TSTM WND GST     1 N BUFFALO             45.60N 103.55W
06/26/2011  M73 MPH          HARDING            SD   ASOS

&&

JSCHILD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 6:33 PM MDTSevere Thunderstorm WarningUNRCuster, Fall River57 min
Jun 25, 6:53 PM MDTSevere Thunderstorm WarningUNRCuster, Fall River42 min
Jun 25, 7:00 PM MDTSevere Thunderstorm WarningUNRFall River30 min
Jun 25, 7:26 PM MDTSevere Thunderstorm WarningUNR35 min
Jun 25, 7:29 PM MDTSevere Thunderstorm WarningUNRCuster, Pennington46 min
Jun 25, 7:58 PM MDTSevere Thunderstorm WarningUNRMeade, Pennington62 min
Jun 25, 8:02 PM MDTSevere Thunderstorm WarningUNRBennett28 min
Jun 25, 8:05 PM MDTAreal Flood AdvisoryUNRMeade, Pennington3 hr
Jun 25, 8:07 PM MDTSevere Thunderstorm WarningUNRCuster, Pennington53 min
Jun 25, 8:14 PM MDTSevere Thunderstorm WarningUNRLawrence, Meade, Pennington61 min
Jun 25, 8:51 PM MDTSevere Thunderstorm WarningUNRHaakon, Jackson, Meade, Pennington54 min
Jun 25, 9:13 PM MDTSevere Thunderstorm WarningUNRButte, Meade62 min
Jun 25, 9:44 PM MDTAreal Flood AdvisoryUNRMeade6 hr
Jun 25, 10:02 PM MDTSevere Thunderstorm WarningUNRMeade40 min
Jun 25, 10:23 PM MDTSevere Thunderstorm WarningUNRButte, Lawrence, Meade31 min
Jun 26, 1:34 AM MDTAreal Flood AdvisoryUNRMeade, Pennington8 hr
Jun 26, 2:10 AM MDTSevere Thunderstorm WarningUNRCuster, Pennington41 min
Jun 26, 3:00 AM MDTAreal Flood AdvisoryUNRBennett, Custer, Jackson, Pennington6 hr
Jun 26, 3:07 AM MDTSevere Thunderstorm WarningUNRHarding68 min
Jun 26, 3:58 AM MDTSevere Thunderstorm WarningUNRHarding, Perkins62 min
Jun 26, 4:15 AM MDTSevere Thunderstorm WarningUNRBennett48 min
Jun 26, 4:37 AM MDTSevere Thunderstorm WarningUNRPerkins24 min
Jun 26, 7:19 AM MDTSevere Thunderstorm WarningUNRHarding56 min
Jun 26, 8:46 AM MDTSevere Thunderstorm WarningUNRBennett, Jackson, Pennington59 min
Jun 26, 9:03 AM MDTAreal Flood AdvisoryUNRBennett, Custer, Jackson, Pennington6 hr
Jun 26, 10:24 AM MDTSevere Thunderstorm WarningUNRHarding, Perkins66 min
Jun 26, 10:53 AM MDTSevere Thunderstorm WarningUNRZiebach19 min
Jun 26, 12:19 PM MDTSevere Thunderstorm WarningUNRHaakon, Jackson, Meade, Pennington56 min
Jun 26, 12:55 PM MDTSevere Thunderstorm WarningUNRCuster, Pennington65 min
Jun 26, 1:54 PM MDTSevere Thunderstorm WarningUNRCuster, Pennington32 min
Jun 26, 2:15 PM MDTSevere Thunderstorm WarningUNRPennington41 min
Jun 26, 2:22 PM MDTSevere Thunderstorm WarningUNRFall River53 min
Jun 26, 2:37 PM MDTSevere Thunderstorm WarningUNRMeade, Pennington53 min
Jun 26, 3:18 PM MDTSevere Thunderstorm WarningUNRMeade, Pennington57 min
Jun 26, 3:22 PM MDTSevere Thunderstorm WarningUNRHaakon, Jackson, Pennington53 min
Jun 26, 3:37 PM MDTSevere Thunderstorm WarningUNRFall River53 min
Jun 26, 3:51 PM MDTSevere Thunderstorm WarningUNRHaakon, Pennington, Ziebach41 min
Jun 26, 4:12 PM MDTSevere Thunderstorm WarningUNRHaakon, Jackson, Pennington63 min
Jun 26, 4:32 PM MDTSevere Thunderstorm WarningUNRFall River58 min
Jun 26, 5:46 PM MDTSevere Thunderstorm WarningUNRCuster, Fall River59 min
Jun 26, 5:49 PM MDTFlash Flood WarningUNRFall River65 min
Jun 25, 7:15 PM MDTSevere Thunderstorm WarningUNRWeston45 min
Jun 25, 8:11 PM MDTSevere Thunderstorm WarningUNRCampbell, Weston27 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2011Every severe thunderstorm warning in 2011

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.