Alert archive / South Dakota / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 367
The Storm Prediction Center issued this severe thunderstorm watch at Jun 10, 2012, 1:07 AM CDT for 6 counties in Minnesota; 8 counties in North Dakota; 9 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 10, 2012, 1:07 AM CDT (06:07 UTC)
- Expired
- Jun 10, 2012, 6:45 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
All 23 counties
Big Stone County, MN, Clay County, MN, Grant County, MN, Norman County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, LaMoure County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Beadle County, SD, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 93 km from the middle of the area, began a volume at 06:10 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
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 2:22 AM CDT | Severe Thunderstorm Warning | BIS | Dickey, LaMoure, McIntosh | 53 min |
| Jun 10, 3:53 AM CDT | Severe Thunderstorm Warning | ABR | Clark, Day, Marshall, Roberts | 37 min |
| Jun 10, 4:15 AM CDT | Severe Thunderstorm Warning | ABR | Marshall | 18 min |
| Jun 10, 4:18 AM CDT | Severe Thunderstorm Warning | FGF | Richland, Sargent | 42 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 6.1 hours before the alert went out and 146 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
- 1653 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 2112 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
539
WWUS20 KWNS 100614
SEL7
SPC WW 100614
MNZ000-NDZ000-SDZ000-101300-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 367
NWS STORM PREDICTION CENTER NORMAN OK
110 AM CDT SUN JUN 10 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
FAR WESTERN MINNESOTA
SOUTHEAST NORTH DAKOTA
NORTHEAST SOUTH DAKOTA
EFFECTIVE THIS SUNDAY MORNING FROM 110 AM UNTIL 800 AM CDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES WEST
SOUTHWEST OF ABERDEEN SOUTH DAKOTA TO 40 MILES EAST SOUTHEAST OF
FARGO NORTH DAKOTA. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 366...
DISCUSSION...CNTRL SD SQLN EXPECTED TO CONTINUE GENERALLY NEWD
THROUGH NE SD AND SE ND BEFORE WEAKENING UPON REACHING WRN EDGE OF
LOW LVL MOIST AXIS IN WRN MN. CONVECTIVE SYSTEM...LIKE THE ONE
YESTERDAY MORNING...LIKELY IS SLIGHTLY ELEVATED ABOVE SE-MOVING
NE-SW COLD FRONT. SFC DATA SUGGEST THAT THIS BOUNDARY WILL CONTINUE
MOVING SEWD THROUGH SUNRISE. THIS ACTION MAY FOSTER ADDITIONAL
STORM DEVELOPMENT ON THE S SIDE OF THE SQLN...AND...AT LEAST FOR
AWHILE...MAY TURN OVERALL SYSTEM MOTION SLIGHTLY TO THE RIGHT.
DESPITE ELEVATED NATURE OF SQLN...EMBEDDED SUSTAINED
STORMS/SUPERCELLS WILL POSE A RISK FOR DMGG WIND AND SVR HAIL GIVEN
STRENGTH OF CLOUD LAYER FLOW AND STRONG BUOYANCY ASSOCIATED WITH
DEEP EML.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 24030.
...CORFIDISPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 8:02 PM CDT | Mesoscale Discussion | SPC | Kittson, Marshall, Roseau | 28 min |
| Jun 10, 12:45 AM CDT | Mesoscale Discussion | SPC | Clay, Wilkin | 60 min |
| Jun 10, 1:34 PM CDT | Mesoscale Discussion | SPC | Aitkin, Benton, Brown, Cass, Chippewa, Cottonwood and 29 more | 56 min |
| Jun 10, 3:03 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Anoka, Becker, Beltrami, Benton, Blue Earth and 58 more | 8 hr |
| Jun 10, 5:38 PM CDT | Mesoscale Discussion | SPC | Aitkin, Anoka, Beltrami, Benton, Blue Earth, Brown and 45 more | 67 min |
| Jun 9, 10:08 PM CDT | Mesoscale Discussion | SPC | Bennett, Brown, Buffalo, Campbell, Edmunds, Faulk and 17 more | 67 min |
| Jun 9, 10:23 PM CDT | Severe Thunderstorm Watch | SPC | Bennett, Buffalo, Campbell, Dewey, Edmunds, Faulk and 17 more | 5 hr |
Nearby
Severe Thunderstorm Watches in South Dakota, 2012Severe Thunderstorm Watches in North Dakota, 2012Severe Thunderstorm Watches in Minnesota, 2012Every severe thunderstorm watch 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.