Alert archive / South Dakota / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 21, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Jun 5, 2017, 4:10 PM MDT for Pennington County, South Dakota. It was in force for 35 min. 4 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 5, 2017, 4:10 PM MDT (22:10 UTC)
- Expired
- Jun 5, 2017, 4:45 PM MDT
- In force
- 35 min
- Issued by
- NWS Rapid City, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Pennington County, SD
The radar
The Rapid City radar (KUDX), 61 km from the middle of the area, began a volume at 22:13 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 5, 4:25 PM MDT | HAIL 0.75 | 3 Ene Hill City, SD | |
| Jun 5, 4:42 PM MDT | HAIL 1 | 2 Nnw Hill City, SD | |
| Jun 5, 4:42 PM MDT | HAIL 1 | 3 Nne Hill City, SD | |
| Jun 5, 4:42 PM MDT | HAIL 1 | Hill City, SD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 32 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Rapid City, SD (KRAP), launched 12:00Z, 10.2 hours before the alert went out and 55 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2173 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
672
WUUS53 KUNR 052210
SVRUNR
SDC103-052245-
/O.NEW.KUNR.SV.W.0021.170605T2210Z-170605T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Rapid City SD
410 PM MDT MON JUN 5 2017
The National Weather Service in Rapid City has issued a
* Severe Thunderstorm Warning for...
West central Pennington County in west central South Dakota...
* Until 445 PM MDT
* At 409 PM MDT, a severe thunderstorm was located near Hill City,
moving east at 5 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Hill City, Sheridan Lake and Mount Rushmore KOA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4399 10365 4405 10356 4400 10339 4389 10356
TIME...MOT...LOC 2209Z 291DEG 5KT 4399 10358
HAIL...1.00IN
WIND...60MPH
$$
Carstens1 follow-up statement
647 WWUS53 KUNR 052234 SVSUNR Severe Weather Statement National Weather Service Rapid City SD 434 PM MDT MON JUN 5 2017 SDC103-052245- /O.CON.KUNR.SV.W.0021.000000T0000Z-170605T2245Z/ Pennington SD- 434 PM MDT MON JUN 5 2017 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM MDT FOR WEST CENTRAL PENNINGTON COUNTY... At 434 PM MDT, a severe thunderstorm was located near Hill City, and is nearly stationary. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Hill City, Sheridan Lake and Mount Rushmore KOA. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4399 10365 4405 10356 4400 10339 4389 10356 TIME...MOT...LOC 2234Z 314DEG 3KT 4396 10354 HAIL...1.00IN WIND...<50MPH $$ Carstens
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 5, 2:09 PM MDT, 2 hours 1 minute earlier.
Area forecast discussion, Jun 5, 2:09 PM MDT, 2 hours 1 minute before
Area Forecast Discussion For Western SD and Northeastern WY National Weather Service Rapid City SD 209 PM MDT Mon Jun 5 2017 .DISCUSSION...(This Evening Through Monday) Issued at 144 PM MDT Mon Jun 5 2017 Latest upper analysis shows a high amplitude SW-NE oriented upper ridge extending from the SRN Rockies, across the nrn plains and then northward across Manitoba to Hudson Bay. An upper trough is currently approaching the forecast area from the west. The SFC low/trough is currently moving from eastern MT/WY into the western Dakotas with a cold front moving into southeastern MT. Very warm temperatures currently exists across the forecast area, generally in the mid 80s to lower 90s. With southeasterly winds, most observations are showing dewpoints in the lower 50s, however dewpoints adjacent to the western/downslope side of the Black Hills are only in the mid 30 to mid 40s. Latest meso analysis shows MUCAPE ranging from 500-1500J/KG with most areas remaining capped at this time. The exception is over the nrn Black Hills were an isolated thunderstorm had already developed earlier this afternoon but couldn't sustain convection after moving northeastward off the Black Hills. Shear will become most favorable for possible supercells during the late afternoon and early evening. As the cold front moves into the forecast area. This will increasing chances for TSRA during the late aftn/eve. Gusty winds look to be the main threat from any thunderstorms, but can't rule out some large hail as well. The showers and thunderstorms will continue to spread eastward over western South Dakota tonight. The cold front will continue to slowly move eastward, across south central SD on Tuesday. The trailing shortwave will keep chances for showers and storms across western and central SD on Tuesday, before exiting the eastern parts of the forecast area Tuesday night. Highs will be cooler on Tuesday behind the front, with readings in the 70s and lower 80s. There will be slight chances for showers and thunderstorms over parts of northeastern Wyoming, the Black Hills and far southwestern SD on Wednesday, with a better chance over northeastern Wyoming and western South Dakota on Thursday during the afternoon and evening hours. The upper ridge will then build back over the area late in the week, with drier weather and much warmer than average temperatures. Slightly cooler air will arrive behind a cold front on Sunday. .AVIATION...(For the 18Z TAFS Through 18Z Tuesday) Issued At 1045 AM MDT Mon Jun 5 2017 Scattered thunderstorms will develop over northeastern Wyoming and far western South Dakota this afternoon, with showers and thunderstorms spreading eastward across the rest of western South Dakota overnight. Strong wind gusts and large hail are possible this afternoon and evening. The showers and thunderstorms will continue over parts of southwestern and central South Dakota through Tuesday morning. LCL MVFR conditions are expected near any showers or thunderstorms. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...None. WY...None. && DISCUSSION...10 AVIATION...10
Hazardous weather outlook, Jun 5, 4:17 AM MDT, 11 hours 53 minutes before
Hazardous Weather Outlook National Weather Service Rapid City SD 417 AM MDT Mon Jun 5 2017 SDZ046-047-049-061300- Mellette-Todd-Tripp- 517 AM CDT Mon Jun 5 2017 This Hazardous weather outlook is for portions of south central South Dakota. .DAY ONE...Today and Tonight Isolated to scattered thunderstorms will develop late this afternoon and tonight. A few storms may contain small hail and gusts winds, but widespread severe storms are not expected. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms are possible Tuesday and Thursday, but organized severe thunderstorms are 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 SDZ001-002-012>014-024>032-041>044-072>074-WYZ054>058-071-061300- Harding-Perkins-Butte-Northern Meade Co Plains-Ziebach- Northern Black Hills-Northern Foot Hills-Rapid City- Southern Foot Hills-Central Black Hills-Southern Black Hills- Custer Co Plains-Pennington Co Plains-Haakon-Fall River- Oglala Lakota-Jackson-Bennett-Sturgis/Piedmont Foot Hills- Southern Meade Co Plains-Hermosa Foot Hills-Northern Campbell- Southern Campbell-Western Crook-Wyoming Black Hills-Weston- Northeastern Crook- 417 AM MDT Mon Jun 5 2017 This Hazardous weather outlook is for portions of the Black Hills of South Dakota...western South Dakota...northeast Wyoming...and the Black Hills of Wyoming. .DAY ONE...Today and Tonight Isolated to scattered thunderstorms will develop later this afternoon and persist into tonight. Isolated severe thunderstorms are possible late this afternoon and early this evening. The main threats will be damaging wind gusts and quarter size hail. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday Thunderstorms are possible Wednesday through Friday, but organized severe thunderstorms are 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, Jun 5, 1:01 PM MDT, 3 hours 9 minutes before
Special Weather Statement National Weather Service Rapid City SD 101 PM MDT MON JUN 5 2017 SDZ024-072-051930- Northern Black Hills SD-Sturgis/Piedmont Foot Hills SD- 101 PM MDT MON JUN 5 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MEADE AND EASTERN LAWRENCE COUNTIES UNTIL 130 PM MDT... At 100 PM MDT, Doppler radar was tracking a strong thunderstorm near Dalton Lake, or 10 miles south of Sturgis, moving east at 10 mph. Dime size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Piedmont, Tilford and Dalton Lake. This Includes Interstate 90 in South Dakota between Mile Markers 40 and 45. LAT...LON 4421 10354 4427 10359 4434 10346 4423 10337 TIME...MOT...LOC 1900Z 249DEG 7KT 4426 10352 Richards
Special weather statement, Jun 5, 2:23 PM MDT, 1 hour 47 minutes before
Special Weather Statement National Weather Service Rapid City SD 223 PM MDT MON JUN 5 2017 SDZ024-025-028-072-052115- Northern Black Hills SD-Central Black Hills SD- Northern Foot Hills SD-Sturgis/Piedmont Foot Hills SD- 223 PM MDT MON JUN 5 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MEADE...SOUTHEASTERN LAWRENCE AND WEST CENTRAL PENNINGTON COUNTIES UNTIL 315 PM MDT... At 222 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from near Roubaix Lake to Pactola Reservoir. Movement was northeast at 15 mph. Dime size hail and winds in excess of 30 mph will be possible with these storms. Locations impacted include... Sturgis, Summerset, Nemo, Piedmont, Silver City, Tilford, Brownsville, Galena, Mystic, Pactola Reservoir, Dalton Lake, Apple Springs and Roubaix Lake. This Includes Interstate 90 in South Dakota between Mile Markers 28 and 32, and between Mile Markers 40 and 49. LAT...LON 4445 10355 4418 10333 4399 10356 4425 10386 TIME...MOT...LOC 2022Z 223DEG 13KT 4421 10374 4405 10353 Hintz
Special weather statement, Jun 5, 3:50 PM MDT, 20 minutes before
Special Weather Statement National Weather Service Rapid City SD 350 PM MDT MON JUN 5 2017 WYZ056-057-052230- Wyoming Black Hills WY-Western Crook WY- 350 PM MDT MON JUN 5 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CROOK COUNTY UNTIL 430 PM MDT... At 350 PM MDT, Doppler radar was tracking a strong thunderstorm near Alva, or 23 miles north of Sundance. This storm was nearly stationary. Winds in excess of 40 mph will be possible with this storm. Locations impacted include... Alva and Bear Lodge Campground. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4491 10437 4460 10426 4461 10452 4481 10459 TIME...MOT...LOC 2150Z 080DEG 1KT 4475 10444 Hintz
Special weather statement, Jun 5, 3:55 PM MDT, 15 minutes before
Special Weather Statement National Weather Service Rapid City SD 355 PM MDT MON JUN 5 2017 SDZ028-052245- Central Black Hills SD- 355 PM MDT MON JUN 5 2017 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL PENNINGTON COUNTY UNTIL 445 PM MDT... At 354 PM MDT, Doppler radar was tracking a strong thunderstorm near Mystic, or near Hill City. This storm was nearly stationary. Winds in excess of 30 mph will be possible with this storm. Locations impacted include... Pactola Reservoir and Sheridan Lake. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4408 10352 4395 10348 4393 10362 4404 10367 TIME...MOT...LOC 2154Z 293DEG 3KT 4401 10359 Hintz
The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 1:01 PM MDT | Special Weather Statement | UNR | Lawrence | 29 min |
| Jun 5, 2:23 PM MDT | Special Weather Statement | UNR | Lawrence | 52 min |
| Jun 5, 2:37 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence, Meade | 53 min |
| Jun 5, 2:55 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 50 min |
| Jun 5, 3:55 PM MDT | Special Weather Statement | UNR | Custer | 50 min |
| Jun 5, 4:46 PM MDT | Severe Thunderstorm Warning | UNR | Pennington | 29 min |
| Jun 5, 4:52 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 38 min |
| Jun 5, 5:01 PM MDT | Severe Thunderstorm Warning | UNR | Custer | 44 min |
| Jun 5, 5:50 PM MDT | Special Weather Statement | UNR | Lawrence | 40 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2017Every severe thunderstorm warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.