Alert archive / South Dakota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 252, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Jul 9, 2007, 6:59 PM MDT for Pennington County, South Dakota. It was in force for 46 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 9, 2007, 6:59 PM MDT (00:59 UTC)
- Expired
- Jul 9, 2007, 7:45 PM MDT
- In force
- 46 min
- Issued by
- NWS Rapid City, SD
- Area
- Counties, with a storm outline in the text
County Pennington County, SD
The radar
The Rapid City radar (KUDX), 13 km from the middle of the area, began a volume at 01:01 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 9, 1:01 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 1.0 hours before the alert went out and 9 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
- 260 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 3053 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 9, 1:40 PM MDT, 5 hours 19 minutes earlier.
Area forecast discussion, Jul 9, 1:40 PM MDT, 5 hours 19 minutes before
AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY NATIONAL WEATHER SERVICE RAPID CITY SD 140 PM MDT MON JUL 9 2007 .DISCUSSION...SFC ANALYSIS SHOWS TROF EXTENDING FM ERN MT THRU CNTRL WY ATTM WITH CDFNT PUSHING THRU NCNTRL MT. WATER VAPOR SHOWS VIGOROUS UPR TROF TRACKING SEWD FROM SRN ALTA INTO SASK. QUITE WX CURRENTLY ACRS THE CWFA EARLY THIS AFTN...BUT EXPECT THIS TO CHANGE AS FORCING WITH CDFNT/UPR WAVE BRINGS THE THREAT FOR SVR WX. TONIGHT...EXPECT CONVECTION TO CONTINUE DEVELOPING ALONG SFC TROF/CDFNT AS THEY ADVANCE EWD. MLCAPE OVER 2000J/KG WITH LITTLE IN THE WAY OF A CAP...COMBINED WITH STEEPENING MID LVL LAPSE RATES AND INCREASING MID LVL WINDS (AS UPR TROF APPROACHES) WILL SET THE STAGE FOR AN ACTIVE LATE AFTN/EVE ACRS THE CWFA. BIGGEST THREAT INITIALLY WILL BE LARGE HAIL...BUT THREAT MAY SHIFT TO MORE OF A WIND THREAT THIS EVE AS CONVECTION BECOMES LINEAR ALG THE CDFNT. TUE AND WED...CDFNT SHOULD BE THRU THE CWFA BY OR SHORTLY AFTER DAYBREAK TUESDAY WITH GUSTY NW WINDS USHERING MUCH COOLER AND DRIER AIR INTO THE REGION. MOST AREAS SHOULD ONLY SEE HIGHS IN THE 70S. DRY CONDITIONS WILL CONTINUE ON WED...WITH A LITTLE LESS WIND AND ONLY SLIGHTLY WARMER TEMPS. EXTENDED...NORTHWEST FLOW ALOFT WILL CONTINUE ACROSS THE NORTHERN PLAINS THROUGH THE WEEKEND. TEMPERATURES WILL REMAIN MILD THROUGH THE WORK WEEK WITH MOSTLY DRY WEATHER EXPECTED. A WEAK DISTURBANCE WILL CROSS THE NORTHERN PLAINS BY THE WEEKEND...GIVING THE AREA A CHANCE OF THUNDERSTORMS. && .AVIATION...SCATTERED -SHRA AND -TSRA ARE EXPECTED TO RE-DEVELOP THIS AFTERNOON AND PERSIST THROUGH THE EVENING. SOME OF THESE STORMS COULD BE SEVERE WITH HAIL AND VERY GUSTY WINDS. A STRONG COLD FRONT WILL PASS THROUGH THE REGION LATE THIS EVENING WITH WINDS SWITCHING TO THE NORTH/NORTHWEST AT 20 TO 30 MPH. && .UNR WATCHES/WARNINGS/ADVISORIES... SD...NONE. WY...NONE. && JOHNSON/RUDGE
Hazardous weather outlook, Jul 9, 5:11 AM MDT, 13 hours 48 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RAPID CITY SD 511 AM MDT MON JUL 9 2007 SDZ001-002-012>014-024>032-041>044-046-047-049-072>074-WYZ054>058- 071-101400- 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- 511 AM MDT (611 AM CDT) MON JUL 9 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN SOUTH DAKOTA AND NORTHEASTERN WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS NORTHEAST WYOMING...THE BLACK HILLS...AND NORTHWEST SOUTH DAKOTA THIS AFTERNOON AND EVENING AS A COLD FRONT MOVES INTO THE AREA. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS... WITH LARGE HAIL AND DAMAGING WIND GUSTS POSSIBLE. AN ISOLATED TORNADO IS POSSIBLE ACROSS NORTHWEST SOUTH DAKOTA. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY.
In the hours before
Local storm report, Jul 9, 6:32 PM MDT, 27 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 |
|---|---|---|---|---|
| Jul 9, 6:05 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 25 min |
| Jul 9, 6:08 PM MDT | Severe Thunderstorm Warning | UNR | Perkins | 45 min |
| Jul 9, 6:24 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 66 min |
| Jul 9, 6:43 PM MDT | Severe Thunderstorm Warning | UNR | Haakon, Ziebach | 62 min |
| Jul 9, 6:47 PM MDT | Severe Thunderstorm Warning | UNR | Pennington | 58 min |
| Jul 9, 7:00 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 33 min |
| Jul 9, 7:25 PM MDT | Severe Thunderstorm Warning | UNR | Haakon | 65 min |
| Jul 9, 7:53 PM MDT | Severe Thunderstorm Warning | UNR | Custer | 67 min |
| Jul 9, 7:57 PM MDT | Severe Thunderstorm Warning | UNR | Pennington | 18 min |
| Jul 9, 8:01 PM MDT | Severe Thunderstorm Warning | UNR | Jackson | 59 min |
| Jul 9, 8:22 PM MDT | Severe Thunderstorm Warning | UNR | 53 min | |
| Jul 9, 8:33 PM MDT | Severe Thunderstorm Warning | UNR | Mellette | 57 min |
| Jul 9, 8:41 PM MDT | Severe Thunderstorm Warning | UNR | Bennett | 64 min |
| Jul 9, 8:50 PM MDT | Severe Thunderstorm Warning | UNR | Todd | 55 min |
| Jul 9, 9:17 PM MDT | Severe Thunderstorm Warning | UNR | 45 min | |
| Jul 9, 9:26 PM MDT | Severe Thunderstorm Warning | UNR | Mellette | 27 min |
| Jul 9, 9:28 PM MDT | Severe Thunderstorm Warning | UNR | Tripp | 62 min |
| Jul 9, 9:32 PM MDT | Severe Thunderstorm Warning | UNR | Todd | 35 min |
| Jul 9, 11:53 PM MDT | Severe Thunderstorm Warning | UNR | Fall River | 36 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2007Every severe thunderstorm warning in 2007
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.