Alert archive / South Dakota / Tornado Warnings in 2007
Tornado Warning 21, NWS Rapid City, SD
NWS Rapid City, SD issued this tornado warning at Aug 17, 2007, 5:52 PM MDT for Pennington County, South Dakota. It was in force for 53 min. 3 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
- Aug 17, 2007, 5:52 PM MDT (23:52 UTC)
- Expired
- Aug 17, 2007, 6:45 PM MDT
- In force
- 53 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), 43 km from the middle of the area, began a volume at 23:55 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 |
|---|---|---|---|
| Aug 17, 6:30 PM MDT | TSTM WND GST 60 | 1 N Hisega, SD | |
| Aug 17, 6:30 PM MDT | HAIL 0.88 | 1 N Hisega, SD | |
| Aug 17, 6:30 PM MDT | HAIL 1.75 | Black Hawk, SD |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 17, 4:21 PM MDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 11.9 hours before the alert went out and 39 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
- 1026 J/kg
- Mixed-layer CIN
- -203 J/kg
- Mixed-layer LCL
- 1565 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KUNR 172351 TORUNR SDC103-180045- /O.NEW.KUNR.TO.W.0021.070817T2352Z-070818T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE RAPID CITY SD 552 PM MDT FRI AUG 17 2007 THE NATIONAL WEATHER SERVICE IN RAPID CITY HAS ISSUED A * TORNADO WARNING FOR... CENTRAL PENNINGTON COUNTY IN WEST CENTRAL SOUTH DAKOTA * UNTIL 645 PM MDT * AT 547 PM MDT...DOPPLER RADAR INDICATED A TORNADIC THUNDERSTORM NEAR JOHNSON SIDING...OR ABOUT 12 MILES NORTHWEST OF RAPID CITY... MOVING SOUTHEAST AT 10 MPH. * LOCATIONS IMPACTED INCLUDE... JOHNSON SIDING... HISEGA... RAPID CITY... THIS INCLUDES INTERSTATE 90 BETWEEN MILE MARKERS 53 AND 61... TAKE SHELTER IN A BASEMENT OR SMALL INTERIOR ROOM ON THE GROUND FLOOR. STAY AWAY FROM WINDOWS AND EXTERIOR WALLS. PROTECT YOURSELF FROM FLYING DEBRIS WITH BLANKETS...PILLOWS...OR CUSHIONS. LAT...LON 4422 10340 4413 10355 4395 10334 4408 10314 $$ RUDGE
The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 3:23 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 67 min |
| Aug 17, 3:47 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 58 min |
| Aug 17, 3:48 PM MDT | Flash Flood Warning | UNR | Meade | 117 min |
| Aug 17, 4:28 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 62 min |
| Aug 17, 4:41 PM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 64 min |
| Aug 17, 5:28 PM MDT | Severe Thunderstorm Warning | UNR | Meade, Pennington | 62 min |
| Aug 17, 5:29 PM MDT | Flash Flood Warning | UNR | Meade | 4 hr |
Nearby
Tornado Warnings in South Dakota, 2007Every tornado warning in 2007Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.