Alert archive / South Dakota / Special Weather Statements in 2021

Special Weather Statement, NWS Rapid City, SD

August 5, 2021Bennett County, Jackson County, South Dakota

NWS Rapid City, SD issued this special weather statement at Aug 5, 2021, 6:33 PM MDT for Bennett County, Jackson County, South Dakota. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 5, 2021, 6:33 PM MDT (00:33 UTC)
Expired: Aug 5, 2021, 7:30 PM MDT
In force: 57 min
Issued by: NWS Rapid City, SD
Hail: 0.00 in
Wind: 50

Counties Bennett County, SD, Jackson County, SD

The radar

The Rapid City radar (KUDX), 106 km from the middle of the area, began a volume at 00:36 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 0.6 hours before the alert went out and 324 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: 835 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1549 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 259 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 5, 5:26 PM MDT, 1 hour 7 minutes earlier.

Area forecast discussion, Aug 5, 5:26 PM MDT, 1 hour 7 minutes before

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Hazardous weather outlook, Aug 5, 4:45 AM MDT, 13 hours 48 minutes before

Hazardous Weather Outlook
National Weather Service Rapid City SD
445 AM MDT Thu Aug 5 2021

SDZ001-002-012-013-024>031-041-042-072>074-WYZ054>058-071-061300-
Harding-Perkins-Butte-Northern Meade Co Plains-
Northern Black Hills-Northern Foot Hills-Rapid City-
Southern Foot Hills-Central Black Hills-Southern Black Hills-
Custer Co Plains-Pennington Co Plains-Fall River-Oglala Lakota-
Sturgis/Piedmont Foot Hills-Southern Meade Co Plains-
Hermosa Foot Hills-Northern Campbell-Southern Campbell-
Western Crook-Wyoming Black Hills-Weston-Northeastern Crook-
445 AM MDT Thu Aug 5 2021

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

.DAY ONE...TODAY AND TONIGHT

Isolated showers and thunderstorms are possible today. Severe storms
are not expected.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Scattered thunderstorms are expected Friday afternoon and evening.
Some of the storms will be capable of marginally severe wind or
hail.

.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

SDZ014-032-043-044-046-047-049-061300-
Ziebach-Haakon-Jackson-Bennett-Mellette-Todd-Tripp-
445 AM MDT Thu Aug 5 2021 /545 AM CDT Thu Aug 5 2021/

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

.DAY ONE...Today and Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Scattered thunderstorms are expected Friday evening and then again
on Saturday. A strong storm or two is possible, but widespread
severe weather is not expected.

.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 5, 4:53 PM MDT, 1 hour 40 minutes before

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Local storm report, Aug 5, 4:54 PM MDT, 1 hour 39 minutes before

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Special weather statement, Aug 5, 5:36 PM MDT, 57 minutes before

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Local storm report, Aug 5, 5:56 PM MDT, 37 minutes before

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Local storm report, Aug 5, 6:11 PM MDT, 22 minutes before

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Special weather statement, Aug 5, 6:33 PM MDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 1:52 PM MDT	Special Weather Statement	UNR	Custer	23 min
Aug 6, 2:15 PM MDT	Special Weather Statement	UNR	Custer	30 min
Aug 6, 2:24 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade, Pennington	36 min
Aug 6, 3:12 PM MDT	Special Weather Statement	UNR		33 min
Aug 6, 3:44 PM MDT	Special Weather Statement	UNR		31 min
Aug 6, 4:36 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Harding	33 min
Aug 6, 4:53 PM MDT	Severe Thunderstorm Warning	UNR	Fall River	67 min
Aug 6, 5:53 PM MDT	Severe Thunderstorm Warning	UNR	Fall River, Oglala Lakota	67 min
Aug 6, 4:11 PM MDT	Special Weather Statement	UNR	Campbell	34 min
Aug 6, 4:23 PM MDT	Special Weather Statement	UNR	Campbell	22 min
Aug 6, 4:31 PM MDT	Special Weather Statement	UNR	Weston	29 min
Aug 6, 5:08 PM MDT	Special Weather Statement	UNR	Crook	37 min
Aug 6, 5:47 PM MDT	Special Weather Statement	UNR	Crook	28 min

Nearby

Special Weather Statements in South Dakota, 2021 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.