Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 164, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Jul 19, 2012, 6:20 PM CDT for Mellette County, Todd County, Tripp County, South Dakota. It was in force for 55 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 19, 2012, 6:20 PM CDT (23:20 UTC)
- Expired
- Jul 19, 2012, 7:15 PM CDT
- In force
- 55 min
- Issued by
- NWS Rapid City, SD
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 50.0 mph
Counties Mellette County, SD, Todd County, SD, Tripp County, SD
The radar
The North Platte radar (KLNX), 158 km from the middle of the area, began a volume at 23:23 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
Rapid City, SD (KUNR), launched 12:00Z, 11.3 hours before the alert went out and 210 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
- 97 J/kg
- Mixed-layer CIN
- -477 J/kg
- Mixed-layer LCL
- 3320 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -43 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 19, 3:27 PM CDT, 2 hours 53 minutes earlier.
Area forecast discussion, Jul 19, 3:27 PM CDT, 2 hours 53 minutes before
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</html>Hazardous weather outlook, Jul 19, 3:46 PM CDT, 2 hours 34 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RAPID CITY SD 246 PM MDT THU JUL 19 2012 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-201300- 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- 246 PM MDT (346 PM CDT) THU JUL 19 2012 ...HEAT ADVISORY THROUGH MIDNIGHT FRIDAY NIGHT FOR WESTERN SOUTH DAKOTA PLAINS... ...HEAT ADVISORY THROUGH MIDNIGHT SATURDAY NIGHT FOR CENTRAL SOUTH DAKOTA... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING. .DAY ONE...TODAY AND TONIGHT A FEW THUNDERSTORMS WILL OCCUR THROUGH THIS EVENING ON THE SOUTH DAKOTA PLAINS. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE WITH DAMAGING WINDS THE MAIN THREAT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A STRONG UPPER LEVEL RIDGE WILL BRING HOT WEATHER THROUGH EARLY NEXT WEEK. HEAT INDICES WILL PEAK FROM 100 TO 110 DEGREES FRIDAY ON THE SOUTH DAKOTA PLAINS...AND THEN 100 TO 105 DEGREES OVER CENTRAL SOUTH DAKOTA SATURDAY. HEAT EXHAUSTION AND HEAT STROKE ARE POSSIBLE DURING THESE CONDITIONS. EXTREME HEAT CAN ALSO BE DANGEROUS TO PETS AND LIVESTOCK. THUNDERSTORMS ARE POSSIBLE THROUGH EARLY NEXT WEEK. SEVERE THUNDERSTORMS ARE POSSIBLE OVER NORTHEAST WYOMING AND WESTERN SOUTH DAKOTA FRIDAY AND SATURDAY. THE MAIN THREAT FROM THESE STORMS WILL BE DAMAGING WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY.
In the hours before
Special weather statement, Jul 19, 3:27 PM CDT, 2 hours 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 227 PM MDT THU JUL 19 2012 SDZ032-043-192115- HAAKON SD-JACKSON SD- 227 PM MDT THU JUL 19 2012 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN HAAKON AND NORTHERN JACKSON COUNTIES UNTIL 315 PM MDT... AT 226 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES EAST OF CACTUS FLAT...OR 12 MILES WEST OF KADOKA...MOVING NORTHEAST AT 15 MPH. HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... KADOKA... THIS INCLUDES INTERSTATE 90 BETWEEN SOUTH DAKOTA MILE MARKERS 134 AND 160... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. && LAT...LON 4406 10144 4383 10130 4372 10178 4387 10187 TIME...MOT...LOC 2027Z 247DEG 14KT 4383 10175 CALDERON
Special weather statement, Jul 19, 4:16 PM CDT, 2 hours 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
316 PM MDT THU JUL 19 2012
SDZ032-043-046-192215-
HAAKON SD-JACKSON SD-MELLETTE SD-
316 PM MDT THU JUL 19 2012
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MELLETTE...EXTREME
SOUTHEASTERN HAAKON AND NORTHEASTERN JACKSON COUNTIES UNTIL 415 PM
MDT/515 PM CDT/...
AT 312 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 6 MILES SOUTHEAST OF KADOKA...MOVING EAST AT 15
MPH.
HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
BELVIDERE...
THIS INCLUDES INTERSTATE 90 BETWEEN SOUTH DAKOTA MILE MARKERS 149 AND
174...
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
&&
LAT...LON 4382 10159 4404 10105 4387 10105 4385 10101
4385 10099 4382 10096 4384 10092 4380 10087
4369 10079 4365 10151
TIME...MOT...LOC 2116Z 249DEG 11KT 4378 10139
CALDERONSpecial weather statement, Jul 19, 4:36 PM CDT, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
336 PM MDT THU JUL 19 2012
SDZ046-192215-
MELLETTE SD-
436 PM CDT THU JUL 19 2012
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MELLETTE COUNTY UNTIL 515
PM CDT...
AT 434 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR CEDAR BUTTE...OR 13 MILES WEST OF WHITE
RIVER...MOVING EAST AT 20 MPH.
HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
WHITE RIVER...
WOOD...
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
&&
LAT...LON 4359 10113 4374 10076 4372 10072 4376 10065
4375 10063 4377 10060 4374 10052 4343 10044
4343 10109
TIME...MOT...LOC 2136Z 255DEG 19KT 4354 10100
CALDERONSpecial weather statement, Jul 19, 4:57 PM CDT, 1 hour 23 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 357 PM MDT THU JUL 19 2012 SDZ043-046-192245- JACKSON SD-MELLETTE SD- 457 PM CDT THU JUL 19 2012 ...SIGNIFICANT WEATHER ADVISORY FOR WESTERN MELLETTE AND SOUTHEASTERN JACKSON COUNTIES UNTIL 545 PM CDT/445 PM MDT/... AT 355 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 5 MILES NORTH OF NORRIS...OR 24 MILES SOUTHEAST OF KADOKA...MOVING EAST AT 10 MPH. HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... NORRIS... CEDAR BUTTE... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. && LAT...LON 4367 10089 4342 10088 4345 10133 4363 10134 TIME...MOT...LOC 2157Z 268DEG 9KT 4354 10123 CALDERON
Special weather statement, Jul 19, 5:19 PM CDT, 1 hour 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
419 PM MDT THU JUL 19 2012
SDZ043-044-046-047-049-192315-
BENNETT SD-JACKSON SD-MELLETTE SD-TODD SD-TRIPP SD-
519 PM CDT THU JUL 19 2012
...SIGNIFICANT WEATHER ADVISORY FOR MELLETTE...EASTERN BENNETT...
SOUTHEASTERN JACKSON...TODD AND NORTHWESTERN TRIPP COUNTIES UNTIL 615
PM CDT/515 PM MDT/...
AT 518 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 5 MILES NORTHEAST OF
WHITE RIVER TO 9 MILES EAST OF PARMELEE TO 9 MILES SOUTH OF
HARRINGTON...AND MOVING NORTHEAST AT 25 MPH.
HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH FREQUENT DANGEROUS LIGHTNING.
LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
MISSION...
SPRING CREEK...
SAINT FRANCIS...
LAKEVIEW...
ROSEBUD...
WOOD...
MOSHER...
OKREEK...
HIDDEN TIMBER...
CARTER...
LITTLEBURG...
WITTEN...
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
&&
LAT...LON 4343 10134 4383 10097 4384 10092 4372 10072
4377 10058 4374 10051 4374 10036 4371 10028
4370 9988 4299 10035 4299 10152 4300 10153
TIME...MOT...LOC 2220Z 229DEG 23KT 4364 10068 4338 10083
4305 10119
CALDERONSpecial weather statement, Jul 19, 6:15 PM CDT, 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RAPID CITY SD
615 PM CDT THU JUL 19 2012
SDZ046-047-049-200000-
MELLETTE SD-TODD SD-TRIPP SD-
615 PM CDT THU JUL 19 2012
...SIGNIFICANT WEATHER ADVISORY FOR EASTERN MELLETTE...TODD AND TRIPP
COUNTIES UNTIL 700 PM CDT...
AT 610 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 16 MILES NORTH OF
MOSHER TO 6 MILES NORTHEAST OF CROOKSTON...AND MOVING EAST AT 30 MPH.
HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.
LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
WINNER...
OKREEK...
MOSHER...
HIDDEN TIMBER...
LITTLEBURG...
CARTER...
WITTEN...
IDEAL...
KEYAPAHA...
CLEARFIELD...
HAMILL...
MILLBORO...
COLOME...
WEWELA...
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
&&
LAT...LON 4299 9955 4299 10114 4373 10078 4372 10072
4377 10058 4373 10046 4374 10036 4371 10028
4371 10001 4368 9988 4371 9977 4375 9976
4376 9963 4351 9961 4350 9952
TIME...MOT...LOC 2315Z 276DEG 28KT 4369 10022 4300 10063
CALDERONThe office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 3:27 PM CDT | Special Weather Statement | UNR | Jackson | 48 min |
| Jul 19, 4:16 PM CDT | Special Weather Statement | UNR | Jackson | 59 min |
| Jul 19, 4:36 PM CDT | Special Weather Statement | UNR | Mellette | 39 min |
| Jul 19, 4:57 PM CDT | Special Weather Statement | UNR | Mellette | 48 min |
| Jul 19, 5:19 PM CDT | Special Weather Statement | UNR | Mellette, Todd | 56 min |
| Jul 19, 6:15 PM CDT | Special Weather Statement | UNR | Mellette, Todd, Tripp | 45 min |
| Jul 19, 6:58 PM CDT | Severe Thunderstorm Warning | UNR | Todd, Tripp | 92 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2012Every 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.