Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 239, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Aug 2, 2012, 10:41 PM MDT for 4 counties in South Dakota. It was in force for 64 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 2, 2012, 10:41 PM MDT (04:41 UTC)
- Expired
- Aug 2, 2012, 11:45 PM MDT
- In force
- 64 min
- Issued by
- NWS Rapid City, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Bennett County, SD, Jackson County, SD, Mellette County, SD, Todd County, SD
The radar
The Rapid City radar (KUDX), 153 km from the middle of the area, began a volume at 04:41 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.7 hours before the alert went out and 259 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
- 1601 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 2010 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.7
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 2, 8:29 PM MDT, 2 hours 12 minutes earlier.
Area forecast discussion, Aug 2, 8:29 PM MDT, 2 hours 12 minutes before
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</html>Hazardous weather outlook, Aug 2, 4:49 AM MDT, 17 hours 52 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RAPID CITY SD 449 AM MDT THU AUG 2 2012 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-031300- 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- 449 AM MDT (549 AM CDT) THU AUG 2 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR FIRE ZONES 259...297 AND 298 IN NORTHEASTERN WYOMING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING. .DAY ONE...TODAY AND TONIGHT LOW HUMIDITY AND GUSTY WINDS WILL RESULT IN RED FLAG CONDITIONS ACROSS NORTHEAST WYOMING THIS AFTERNOON AND EVENING. THERE IS A CHANCE FOR THUNDERSTORMS TODAY AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING ACROSS NORTHEASTERN WYOMING AND WESTERN SOUTH DAKOTA. THE MAIN THREATS FOR SEVERE STORMS WILL BE DAMAGING WIND GUSTS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE OF THUNDERSTORMS ACROSS THE AREA ON FRIDAY. SEVERE STORMS ARE NOT EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY.
In the hours before
Local storm report, Aug 2, 7:55 PM MDT, 2 hours 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
755 PM MDT THU AUG 02 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0751 PM HAIL WASTA 44.07N 102.45W
08/02/2012 E1.25 INCH PENNINGTON SD TRAINED SPOTTER
&&
DBARBERLocal storm report, Aug 2, 8:03 PM MDT, 2 hours 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
803 PM MDT THU AUG 02 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0747 PM TSTM WND GST RAPID CITY AIRPORT 44.05N 103.06W
08/02/2012 M63 MPH PENNINGTON SD ASOS
&&
DBARBERLocal storm report, Aug 2, 8:43 PM MDT, 1 hour 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
843 PM MDT THU AUG 02 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0834 PM TSTM WND GST 3 E PHILIP 44.05N 101.60W
08/02/2012 M61 MPH HAAKON SD ASOS
&&
DBARBERLocal storm report, Aug 2, 9:35 PM MDT, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
935 PM MDT THU AUG 02 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0910 PM TSTM WND GST 2 NE KADOKA 43.85N 101.48W
08/02/2012 E60 MPH JACKSON SD TRAINED SPOTTER
&&
DBARBERSpecial weather statement, Aug 2, 10:02 PM MDT, 39 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 1002 PM MDT THU AUG 2 2012 SDZ043-044-046-047-030445- BENNETT SD-JACKSON SD-MELLETTE SD-TODD SD- 1002 PM MDT THU AUG 2 2012 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MELLETTE...NORTHERN BENNETT...SOUTHERN JACKSON AND NORTHWESTERN TODD COUNTIES UNTIL 1045 PM MDT/1145 PM CDT/... AT 958 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR HISLE...OR 18 MILES NORTH OF MARTIN...MOVING EAST AT 35 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... LONG VALLEY... NORRIS... PARMELEE... CEDAR BUTTE... && LAT...LON 4362 10091 4322 10104 4333 10199 4367 10183 TIME...MOT...LOC 0402Z 276DEG 31KT 4344 10169 CARPENTER
Local storm report, Aug 2, 10:21 PM MDT, 20 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE RAPID CITY SD
1021 PM MDT THU AUG 02 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0448 PM HAIL SUNDANCE 44.40N 104.38W
08/02/2012 E1.75 INCH CROOK WY TRAINED SPOTTER
0545 PM HAIL CHEYENNE CROSSING 44.30N 103.87W
08/02/2012 E1.00 INCH LAWRENCE SD TRAINED SPOTTER
0545 PM TSTM WND GST 12 SSE HOOVER 44.96N 103.13W
08/02/2012 E70 MPH BUTTE SD TRAINED SPOTTER
0545 PM TSTM WND GST 2 NNW SAINT ONGE 44.58N 103.75W
08/02/2012 M70 MPH LAWRENCE SD TRAINED SPOTTER
TREE BRANCHES BROKEN
0615 PM HAIL NEMO 44.19N 103.50W
08/02/2012 M1.00 INCH LAWRENCE SD FIRE DEPT/RESCUE
0623 PM HAIL 1 NNW PIEDMONT 44.24N 103.40W
08/02/2012 M1.25 INCH MEADE SD NWS EMPLOYEE
0640 PM TSTM WND GST 8 WNW USTA 45.25N 102.31W
08/02/2012 E60 MPH PERKINS SD TRAINED SPOTTER
0700 PM HAIL 7 NNE ELLSWORTH AFB 44.25N 103.04W
08/02/2012 M1.00 INCH MEADE SD NWS EMPLOYEE
0702 PM HAIL BOX ELDER 44.12N 103.07W
08/02/2012 E1.75 INCH PENNINGTON SD PUBLIC
0747 PM TSTM WND GST RAPID CITY AIRPORT 44.05N 103.06W
08/02/2012 M63 MPH PENNINGTON SD ASOS
0751 PM HAIL WASTA 44.07N 102.45W
08/02/2012 E1.25 INCH PENNINGTON SD TRAINED SPOTTER
0834 PM TSTM WND GST 3 E PHILIP 44.05N 101.60W
08/02/2012 M61 MPH HAAKON SD ASOS
0910 PM TSTM WND GST 2 NE KADOKA 43.85N 101.48W
08/02/2012 E60 MPH JACKSON SD TRAINED SPOTTER
&&
DBARBERThe office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 6:08 PM MDT | Severe Thunderstorm Warning | UNR | Butte, Meade, Perkins, Ziebach | 67 min |
| Aug 2, 6:41 PM MDT | Severe Thunderstorm Warning | UNR | Haakon, Meade, Ziebach | 39 min |
| Aug 2, 6:44 PM MDT | Severe Thunderstorm Warning | UNR | Meade, Pennington | 76 min |
| Aug 2, 7:20 PM MDT | Severe Thunderstorm Warning | UNR | Meade, Pennington | 55 min |
| Aug 2, 8:12 PM MDT | Severe Thunderstorm Warning | UNR | Custer, Haakon, Jackson, Meade, Pennington | 63 min |
| Aug 2, 9:15 PM MDT | Severe Thunderstorm Warning | UNR | Haakon, Jackson, Mellette | 39 min |
| Aug 2, 10:02 PM MDT | Special Weather Statement | UNR | Jackson | 43 min |
| Aug 2, 11:23 PM MDT | Severe Thunderstorm Warning | UNR | Mellette, Todd, Tripp | 97 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.