Alert archive / South Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 170, NWS Rapid City, SD

August 19, 2021Meade County, Perkins County, Ziebach County, South Dakota

NWS Rapid City, SD issued this severe thunderstorm warning at Aug 19, 2021, 5:26 PM MDT for Meade County, Perkins County, Ziebach County, South Dakota. It was in force for 79 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: Aug 19, 2021, 5:26 PM MDT (23:26 UTC)
Expired: Aug 19, 2021, 6:45 PM MDT
In force: 79 min
Issued by: NWS Rapid City, SD
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Meade County, SD, Perkins County, SD, Ziebach County, SD

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 Aug 19, 11:43 AM MDT, 5 hours 43 minutes earlier.

Area forecast discussion, Aug 19, 11:43 AM MDT, 5 hours 43 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, Aug 19, 3:02 AM MDT, 14 hours 24 minutes before

Hazardous Weather Outlook
National Weather Service Rapid City SD
302 AM MDT Thu Aug 19 2021

SDZ026>032-041>044-046-047-049-074-201300-
Rapid City-Southern Foot Hills-Central Black Hills-
Southern Black Hills-Custer Co Plains-Pennington Co Plains-Haakon-
Fall River-Oglala Lakota-Jackson-Bennett-Mellette-Todd-Tripp-
Hermosa Foot Hills-
302 AM MDT Thu Aug 19 2021 /402 AM CDT Thu Aug 19 2021/

This Hazardous Weather Outlook is for portions of south central
South Dakota...southwestern South Dakota...and the Black Hills of
South Dakota.

.DAY ONE...Today and Tonight

Thunderstorms are likely today and tonight. There is a slight risk
of severe thunderstorms with large hail and damaging winds.
Locally heavy rainfall is also possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There is a chance of thunderstorms Friday. Severe thunderstorms
are not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

SDZ001-002-012>014-024-025-072-073-WYZ054>058-071-201300-
Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach-
Northern Black Hills-Northern Foot Hills-
Sturgis/Piedmont Foot Hills-Southern Meade Co Plains-
Northern Campbell-Southern Campbell-Western Crook-
Wyoming Black Hills-Weston-Northeastern Crook-
302 AM MDT Thu Aug 19 2021

This Hazardous Weather Outlook is for portions of western South
Dakota and northeastern Wyoming.

.DAY ONE...Today and Tonight

Thunderstorms are likely today and tonight. There is a marginal
risk of severe thunderstorms with large hail and damaging winds.
Locally heavy rainfall is also possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

There is a chance of thunderstorms Friday. Severe thunderstorms
are not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

In the hours before

Special weather statement, Aug 19, 3:05 PM MDT, 2 hours 21 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>

Special weather statement, Aug 19, 3:34 PM MDT, 1 hour 52 minutes before

Special Weather Statement
National Weather Service Rapid City SD
334 PM MDT Thu Aug 19 2021

SDZ032-043-192215-
Jackson SD-Haakon SD-
334 PM MDT Thu Aug 19 2021

...A strong thunderstorm will impact portions of southwestern Haakon
and north central Jackson Counties through 415 PM MDT...

At 334 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Cactus Flat, or 13 miles west of Kadoka, moving
north at 35 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
  Philip.

This includes Interstate 90 in South Dakota between Mile Markers 132
and 145.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4370 10166 4373 10190 4419 10186 4413 10150
TIME...MOT...LOC 2134Z 189DEG 32KT 4380 10177

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Bunkers

Special weather statement, Aug 19, 4:22 PM MDT, 1 hour 4 minutes before

Special Weather Statement
National Weather Service Rapid City SD
422 PM MDT Thu Aug 19 2021

SDZ031-032-192245-
Pennington Co Plains SD-Haakon SD-
422 PM MDT Thu Aug 19 2021

...A strong thunderstorm will impact portions of west central Haakon
and eastern Pennington Counties through 445 PM MDT...

At 421 PM MDT, Doppler radar was tracking a strong thunderstorm 8
miles east of Creighton, or 23 miles northwest of Philip, moving
north at 30 mph.

HAZARD...Nickel size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

This storm will remain over mainly rural areas of northeastern
Pennington Co Plains and west central Haakon Counties, northeast of
Creighton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4421 10212 4442 10218 4444 10215 4445 10215
      4444 10211 4446 10208 4447 10191 4420 10194
TIME...MOT...LOC 2221Z 179DEG 25KT 4427 10203

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...<30 MPH

JC

Local storm report, Aug 19, 4:28 PM MDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
428 PM MDT THU AUG 19 2021

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

0427 PM     HEAVY RAIN       MOORCROFT               44.26N 104.94W
08/19/2021  M1.44 INCH       CROOK              WY   MESONET

            24-HOUR RAINFALL.

0427 PM     HEAVY RAIN       1 NNE EDGEMONT          43.31N 103.82W
08/19/2021  M0.79 INCH       FALL RIVER         SD   OTHER FEDERAL

            24-HOUR RAINFALL.

0427 PM     HEAVY RAIN       19 SW UPTON             43.93N 104.92W
08/19/2021  M1.53 INCH       WESTON             WY   MESONET

            24-HOUR RAINFALL.

0427 PM     HEAVY RAIN       1 S DEVILS TOWER        44.58N 104.72W
08/19/2021  M1.02 INCH       CROOK              WY   MESONET

            24-HOUR RAINFALL.

0427 PM     HEAVY RAIN       1 SSW ROZET             44.28N 105.21W
08/19/2021  M1.01 INCH       CAMPBELL           WY   MESONET

            24-HOUR RAINFALL.

0427 PM     HEAVY RAIN       2 WNW CUSTER            43.78N 103.64W
08/19/2021  M0.87 INCH       CUSTER             SD   MESONET

            24-HOUR RAINFALL.

0427 PM     HEAVY RAIN       9 NNE EDGEMONT          43.43N 103.76W
08/19/2021  M0.96 INCH       FALL RIVER         SD   MESONET

            24-HOUR RAINFALL.

0427 PM     HEAVY RAIN       25 ESE WRIGHT           43.55N 105.09W
08/19/2021  M0.76 INCH       CAMPBELL           SD   MESONET

            24-HOUR RAINFALL.

0427 PM     HEAVY RAIN       4 N MOORCROFT           44.32N 104.94W
08/19/2021  M1.69 INCH       CROOK              WY   OTHER FEDERAL

            24-HOUR RAINFALL.

&&

JC

Local storm report, Aug 19, 4:58 PM MDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
458 PM MDT THU AUG 19 2021

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

0450 PM     TSTM WND GST     2 SW BRIDGER            44.53N 101.93W
08/19/2021  M52 MPH          ZIEBACH            SD   MESONET

&&

JC

Special weather statement, Aug 19, 4:59 PM MDT, 27 minutes before

Special Weather Statement
National Weather Service Rapid City SD
459 PM MDT Thu Aug 19 2021

SDZ013-014-073-192330-
Ziebach SD-Southern Meade Co Plains SD-Northern Meade Co Plains SD-
459 PM MDT Thu Aug 19 2021

...A strong thunderstorm will impact portions of southwestern Ziebach
and east central Meade Counties through 530 PM MDT...

At 459 PM MDT, Doppler radar was tracking a strong thunderstorm near
Bridger, or 32 miles south of Faith, moving north at 30 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Takini around 510 PM MDT.

Other locations in the path of this storm include Red Scaffold.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4458 10171 4456 10173 4457 10174 4455 10175
      4452 10181 4452 10185 4454 10189 4452 10205
      4478 10208 4479 10170
TIME...MOT...LOC 2259Z 178DEG 28KT 4456 10187

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 3:05 PM MDT	Special Weather Statement	UNR	Pennington	40 min
Aug 19, 3:34 PM MDT	Special Weather Statement	UNR	Jackson	41 min
Aug 19, 4:22 PM MDT	Special Weather Statement	UNR	Haakon	23 min
Aug 19, 4:59 PM MDT	Special Weather Statement	UNR	Ziebach	31 min
Aug 19, 5:49 PM MDT	Special Weather Statement	UNR	Oglala Lakota	41 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.