Alert archive / South Dakota / Tornado Watches in 2007
Tornado Watch 352
The Storm Prediction Center issued this tornado watch at Jun 6, 2007, 12:04 PM MDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 6, 2007, 12:04 PM MDT (18:04 UTC)
- Expired
- Jun 6, 2007, 6:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 24 counties
Big Horn County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Powder River County, MT, Rosebud County, MT, Box Butte County, NE, Dawes County, NE, Sioux County, NE, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Campbell County, WY, Converse County, WY, Crook County, WY, Johnson County, WY, Niobrara County, WY, Sheridan County, WY, Weston County, WY
The radar
The Rapid City radar (KUDX), 190 km from the middle of the area, began a volume at 18:04 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 2:27 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 63 min |
| Jun 6, 2:35 PM MDT | Severe Thunderstorm Warning | UNR | 55 min | |
| Jun 6, 2:39 PM MDT | Tornado Warning | UNR | Campbell | 51 min |
| Jun 6, 3:10 PM MDT | Tornado Warning | UNR | 50 min | |
| Jun 6, 3:27 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 63 min |
| Jun 6, 3:44 PM MDT | Tornado Warning | UNR | Campbell | 61 min |
| Jun 6, 3:45 PM MDT | Flash Flood Warning | BYZ | Sheridan | 3 hr |
| Jun 6, 3:55 PM MDT | Severe Thunderstorm Warning | UNR | 80 min | |
| Jun 6, 4:12 PM MDT | Severe Thunderstorm Warning | UNR | Butte, Meade | 93 min |
| Jun 6, 4:20 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 55 min |
| Jun 6, 4:50 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 55 min |
| Jun 6, 5:07 PM MDT | Severe Thunderstorm Warning | UNR | Meade | 53 min |
| Jun 6, 5:11 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 34 min |
| Jun 6, 5:43 PM MDT | Severe Thunderstorm Warning | UNR | Butte | 62 min |
| Jun 6, 5:53 PM MDT | Flash Flood Warning | BYZ | Rosebud | 6 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 6.1 hours before the alert went out and 184 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
- 1559 J/kg
- Mixed-layer CIN
- -237 J/kg
- Mixed-layer LCL
- 2235 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 061804
SEL2
SPC WW 061804
MTZ000-NEZ000-SDZ000-WYZ000-070000-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 352
NWS STORM PREDICTION CENTER NORMAN OK
1205 PM MDT WED JUN 6 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
PARTS OF SOUTHEAST MONTANA
PART OF NEBRASKA PANHANDLE
PART OF WESTERN SOUTH DAKOTA
PARTS OF EASTERN WYOMING
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1205 PM UNTIL
600 PM MDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE
MILES EAST AND WEST OF A LINE FROM 10 MILES WEST SOUTHWEST OF
TORRINGTON WYOMING TO 40 MILES NORTH NORTHEAST OF BROADUS
MONTANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
DISCUSSION...APPROACH OF INTENSE UPPER TROUGH AND RAPIDLY DEEPENING
SURFACE LOW OVER CENTRAL WY...EXPECTED TO SUPPORT SEVERE
THUNDERSTORM DEVELOPMENT ACROSS WATCH. 40-50 KT OF DEEP LAYER SHEAR
AND FAVORABLE LOW LEVEL HODOGRAPHS SUPPORT SUPERCELLS INCLUDING
LARGE HAIL AND ISOLATED TORNADOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24025.
...HALESSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 1:28 AM MDT | Mesoscale Discussion | SPC | Richland, Roosevelt, Sheridan | 92 min |
| Jun 6, 11:36 AM MDT | Mesoscale Discussion | SPC | Carter, Powder River | 114 min |
| Jun 6, 5:19 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carter, Custer, Fallon, Powder River, Rosebud | 26 min |
| Jun 6, 5:47 PM MDT | Tornado Watch | SPC | Carter, Custer, Dawson, Fallon, Prairie, Richland and 1 more | 7 hr |
| Jun 5, 6:22 PM MDT | Mesoscale Discussion | SPC | Arthur, Box Butte, Chase, Cheyenne, Dawes, Deuel and 11 more | 113 min |
| Jun 6, 2:31 PM MDT | Mesoscale Discussion | SPC | Cherry | 119 min |
| Jun 6, 2:45 PM MDT | Tornado Watch | SPC | Blaine, Brown, Cherry, Garden, Grant, Hooker and 5 more | 7 hr |
| Jun 6, 5:56 PM MDT | Mesoscale Discussion | SPC | Antelope, Arthur, Blaine, Boone, Boyd, Brown and 24 more | 2 hr |
| Jun 5, 10:47 PM MDT | Mesoscale Discussion | SPC | Buffalo, Corson, Dewey, Hughes, Hyde, Jones and 9 more | 88 min |
Nearby
Tornado Watches in South Dakota, 2007Tornado Watches in Wyoming, 2007Tornado Watches in Montana, 2007Every tornado watch 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.