Alert archive / South Dakota / Tornado Warnings in 2010
Tornado Warning 4, NWS Rapid City, SD
NWS Rapid City, SD issued this tornado warning at May 22, 2010, 9:11 PM CDT for Tripp County, South Dakota. It was in force for 38 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
- May 22, 2010, 9:11 PM CDT (02:11 UTC)
- Expired
- May 22, 2010, 9:49 PM CDT
- In force
- 38 min
- Issued by
- NWS Rapid City, SD
- Area
- Storm-based polygon
County Tripp County, SD
The radar
The North Platte radar (KLNX), 164 km from the middle of the area, began a volume at 02:14 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, 2.2 hours before the alert went out and 209 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
- 3099 J/kg
- Mixed-layer CIN
- -118 J/kg
- Mixed-layer LCL
- 1145 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 426 m²/s²
- 0-3 km storm-relative helicity
- 443 m²/s²
- Significant tornado parameter
- 4.0
- Supercell composite
- 14.0
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at May 22, 3:05 PM CDT, 6 hours 6 minutes earlier.
Area forecast discussion, May 22, 3:05 PM CDT, 6 hours 6 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 205 PM MDT SAT MAY 22 2010 .DISCUSSION...WATER VAPOR SHOWS UPR LOW OVR SRN ID WITH JET STREAK NOSING THRU WRN WY. SFC MAPS SHOWS LOW CENTER EAST KIEN WITH TROF EXTENDING NWD JUST EAST OF A KPHP TO LEMMON LINE. SOME CONVECTION HAS BEGUN ACRS NERN INTO FAR WRN SD BEHIND THE TROF WHERE CAP HAS ERODED AND UPR SUPPORT HAS INCREASED WITH APPROACHING JET STREAK. LATE AFTN/TONIGHT...SCT CONVECTION WILL PROGRESS EWD AS CAP SLOWLY ERODES AND SFC TROF ADVANCES EWD. WITH SFC BOUNDARY HAVING PUSHED EAST OF ALL BUT OUR SCNTRL SD ZONES...THE BEST SVR THREAT MAY BE SHIFTING MORE EAST OF OUR CWFA. HOWEVER...MLCAPE OF 1000-2000J/KG DOES EXIST BEHIND THE TROF INTO WRN SD AND BULK SHEAR IS MORE THAN SUFFICIENT FOR SUPERCELLS SO WE'RE NOT OUT OF THE WOODS QUITE YET. TORNADIC THREAT HOWEVER DOES LOOK TO BE MOSTLY EAST OF OUR AREA. IF CAP IS TO BREAK ACRS SCNTRL SD WHERE THEY WILL SIT ALONG AND JUST EAST OF THE BOUNDARY...ISOLATED TORNADOES MAY STILL BE POSSIBLE. SHOULD SVR STORMS DEVELOP...THE SVR THREAT SHOULD DIMINISH LATER THIS EVE WITH STORMS BECOMING MORE ELEVATED IN NATURE. SUNDAY...SFC HIGH BUILDS INTO THE AREA WITH SHORT WAVE RIDGE PASSING OVERHEAD. MUCH OF THE DAY SHOULD BE DRY...ALTHOUGH COULD SEE A FEW LATE AFTN STORMS IN NERN WY AND THE BLKHLS AS SE BL FLOW BEGINS TO INCREASE. SUNDAY NIGHT AND MONDAY WILL SERVE UP MORE THUNDERSTORMS. FIRST WAVE OF THUNDERSTORMS WILL COME SUNDAY NIGHT AS LOW LEVEL JET TAKES AIM AT WRN SD WITH 850-700MB THETA-E ADVECTION OF 3-5C/HR. STEEP LAPSE RATES...WITH MUCAPE AROUND 500J/KG. THREAT OF HEAVY RAIN. WITH STREAMS RUNNING HIGH MAY NEED A FLOOD WATCH WITH LATER FORECASTS. NEGATIVE TILTED SHORTWAVE THEN LIFTS THROUGH EASTERN WYOMING LATE MONDAY...BRINGING MORE TSRA. EXTENDED...A PERSISTENT UPPER LEVEL TROF OVER THE WESTERN CONUS WILL KEEP ACTIVE SOUTHWESTERLY FLOW ALOFT OVER OUR AREA THROUGH MUCH OF NEXT WEEK. WITH WEAK SHORTWAVE ENERGY EJECTING OUT OF THE TROF...WILL KEEP PERIODIC CHANCES FOR SHOWERS AND THUNDERSTORMS IN THE FORECAST THROUGH THURSDAY. COULD SEE A BREAK IN ACTIVITY FOR MOST AREAS ON TUESDAY AS A DRY SLOT IS PROJECTED TO SLIDE ACROSS. TEMPERATURES WILL GENERALLY BE CLOSE TO SEASONAL AVERAGES EARLY NEXT WEEK WITH A WARMING TREND TOWARD LATE NEXT WEEK. && .AVIATION...SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN ACROSS MUCH OF THE AREA...WITH SOME STRONG STORMS POSSIBLE LATE THIS AFTERNOON AND EVENING...MAINLY ACROSS CENTRAL AND SOUTHERN SOUTH DAKOTA. IN THE WAKE OF THE STORMS...SOME MVFR CEILINGS MAY BE FOUND ACROSS HIGHER ELEVATIONS OF NORTHEAST WYOMING AND ACROSS THE BLACK HILLS LATE TONIGHT INTO SUNDAY MORNING. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...NONE. WY...NONE. && JOHNSON/RUDGE
Hazardous weather outlook, May 22, 12:13 PM CDT, 8 hours 58 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RAPID CITY SD 1113 AM MDT SAT MAY 22 2010 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-231300- 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- 1113 AM MDT (1213 PM CDT) SAT MAY 22 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING. .DAY ONE...TODAY AND TONIGHT AN AREA OF LOW PRESSURE WILL LIFT ACROSS WESTERN SOUTH DAKOTA TODAY...AND WILL BRING THUNDERSTORMS THIS AFTERNOON AND EVENING. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE SOUTH DAKOTA PLAINS...MAINLY EAST OF A LINE FROM LEMMON TO RAPID CITY TO PINE RIDGE. LARGE HAIL AND DAMAGING WIND GUSTS WILL BE THE MAIN THREAT. HOWEVER...ISOLATED TORNADOES ARE ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A STRONG UPPER LEVEL DISTURBANCE WILL BRING WIDESPREAD SHOWERS AND THUNDERSTORMS TO THE AREA SUNDAY NIGHT AND MONDAY. SEVERE THUNDERSTORMS ARE POSSIBLE MONDAY ACROSS MUCH OF WESTERN SOUTH DAKOTA. THERE IS ALSO A THREAT OF HEAVY RAINFALL. WITH AREA RIVERS AND STREAMS RUNNING HIGH...LOCALIZED FLOODING IS POSSIBLE. UNSETTLED WEATHER WILL CONTINUE TUESDAY THROUGH THURSDAY WITH A SLIGHT CHANCE OF THUNDERSTORMS EACH DAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED ACROSS THE SOUTH DAKOTA PLAINS THIS AFTERNOON AND EVENING.
In the hours before
Local storm report, May 22, 6:44 PM CDT, 2 hours 27 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
544 PM MDT SAT MAY 22 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0534 PM HAIL 9 NW RED SCAFFOLD 44.86N 101.98W
05/22/2010 E1.00 INCH ZIEBACH SD TRAINED SPOTTER
&&
WETENKAMPSpecial weather statement, May 22, 7:11 PM CDT, 2 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 611 PM MDT SAT MAY 22 2010 SDZ013-014-031-032-073-230100- HAAKON SD-NORTHERN MEADE CO PLAINS SD-PENNINGTON CO PLAINS SD-SOUTHERN MEADE CO PLAINS SD-ZIEBACH SD- 611 PM MDT SAT MAY 22 2010 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN PENNINGTON... SOUTHEASTERN MEADE...WESTERN HAAKON AND SOUTHWESTERN ZIEBACH COUNTIES UNTIL 700 PM MDT... AT 609 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES NORTHEAST OF WASTA...OR 36 MILES WEST OF PHILIP...MOVING NORTHEAST AT 50 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS STORM... ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... CREIGHTON... PLAINVIEW... BRIDGER... HOWES... RED SCAFFOLD... THIS INCLUDES INTERSTATE 90 BETWEEN SOUTH DAKOTA MILE MARKERS 94 AND 107... TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. CARPENTER
Special weather statement, May 22, 7:17 PM CDT, 1 hour 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 617 PM MDT SAT MAY 22 2010 SDZ012-013-024-025-072-073-230100- BUTTE SD-NORTHERN BLACK HILLS SD-NORTHERN FOOT HILLS SD-NORTHERN MEADE CO PLAINS SD-SOUTHERN MEADE CO PLAINS SD-STURGIS/PIEDMONT FOOT HILLS SD- 617 PM MDT SAT MAY 22 2010 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN LAWRENCE...WESTERN MEADE AND SOUTHEASTERN BUTTE COUNTIES UNTIL 700 PM MDT... AT 614 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR TILFORD...OR 7 MILES SOUTHEAST OF DOWNTOWN STURGIS...MOVING NORTHEAST AT 50 MPH. HAIL UP TO THE SIZE OF NICKELS IS EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... BEAR BUTTE STATE PARK... VALE... THIS INCLUDES INTERSTATE 90 BETWEEN SOUTH DAKOTA MILE MARKERS 29 AND 43... THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. CARPENTER
Local storm report, May 22, 7:34 PM CDT, 1 hour 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
634 PM MDT SAT MAY 22 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0605 PM HAIL 3 W DUPREE 45.05N 101.65W
05/22/2010 E0.88 INCH ZIEBACH SD PUBLIC
&&
WETENKAMPSpecial weather statement, May 22, 7:45 PM CDT, 1 hour 26 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 645 PM MDT SAT MAY 22 2010 SDZ031-032-042-043-230130- HAAKON SD-JACKSON SD-PENNINGTON CO PLAINS SD-SHANNON SD- 645 PM MDT SAT MAY 22 2010 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN PENNINGTON... NORTHEASTERN SHANNON...HAAKON AND WESTERN JACKSON COUNTIES UNTIL 730 PM MDT... AT 641 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR CEDAR PASS...OR 24 MILES WEST OF KADOKA... MOVING NORTHEAST AT 50 MPH. HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... PHILIP... CACTUS FLAT... MINUTEMAN MISSILE SITE... COTTONWOOD... BILLSBURG... MILESVILLE... THIS INCLUDES INTERSTATE 90 BETWEEN SOUTH DAKOTA MILE MARKERS 120 AND 138... THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. CARPENTER
Local storm report, May 22, 8:26 PM CDT, 45 minutes before
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</html>The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 8:05 PM CDT | Severe Thunderstorm Warning | UNR | Mellette, Todd, Tripp | 55 min |
| May 22, 8:31 PM CDT | Tornado Warning | UNR | Mellette, Todd, Tripp | 44 min |
| May 22, 9:08 PM CDT | Severe Thunderstorm Warning | UNR | Tripp | 64 min |
| May 23, 4:13 PM CDT | Flood Watch | UNR | Bennett, Butte, Custer, Fall River, Haakon, Harding and 10 more | 29 hr |
| May 23, 4:30 PM CDT | High Wind Watch | UNR | Bennett, Butte, Custer, Fall River, Haakon, Harding and 10 more | 12 hr |
Nearby
Tornado Warnings in South Dakota, 2010Every tornado warning in 2010Tornadoes in 2010
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.