Alert archive / South Dakota / Tornado Watches in 2014

Tornado Watch 311

June 17, 20149 counties in Montana; 6 counties in North Dakota; 9 counties in South Dakota

The Storm Prediction Center issued this tornado watch at Jun 17, 2014, 12:31 PM MDT for 9 counties in Montana; 6 counties in North Dakota; 9 counties in South Dakota. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 17, 2014, 12:31 PM MDT (18:31 UTC)
Expired
Jun 17, 2014, 8:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 24 counties

Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Garfield County, MT, McCone County, MT, Prairie County, MT, Richland County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Golden Valley County, ND, McKenzie County, ND, Slope County, ND, Bennett County, SD, Butte County, SD, Custer County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
60%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
20%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
50%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

30 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 17, 1:02 PM MDTSevere Thunderstorm WarningBYZCuster, Fallon43 min
Jun 17, 1:07 PM MDTSevere Thunderstorm WarningGGWDawson, Prairie, Wibaux53 min
Jun 17, 1:26 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Prairie64 min
Jun 17, 1:41 PM MDTSevere Thunderstorm WarningBYZCuster, Fallon64 min
Jun 17, 1:51 PM MDTSevere Thunderstorm WarningGGWDawson, Prairie, Wibaux54 min
Jun 17, 2:15 PM MDTTornado WarningBYZCarter45 min
Jun 17, 2:17 PM MDTSevere Thunderstorm WarningGGWDawson, Prairie58 min
Jun 17, 2:21 PM MDTSevere Thunderstorm WarningGGWDawson, McCone54 min
Jun 17, 2:23 PM MDTSevere Thunderstorm WarningBYZCarter, Fallon52 min
Jun 17, 2:35 PM MDTSevere Thunderstorm WarningBYZCuster, Fallon55 min
Jun 17, 2:44 PM MDTTornado WarningBYZFallon61 min
Jun 17, 2:59 PM MDTTornado WarningBYZCarter46 min
Jun 17, 3:01 PM MDTFlash Flood WarningBYZFallon6 hr
Jun 17, 3:38 PM MDTFlash Flood WarningGGWDawson, Prairie4 hr
Jun 17, 3:45 PM MDTSevere Thunderstorm WarningBYZCarter45 min
Jun 17, 3:53 PM MDTSevere Thunderstorm WarningGGWDawson67 min
Jun 17, 4:00 PM MDTSevere Thunderstorm WarningBYZCarter30 min
Jun 17, 4:01 PM MDTSevere Thunderstorm WarningBYZFallon44 min
Jun 17, 4:01 PM MDTSevere Thunderstorm WarningGGWGarfield, Valley59 min
Jun 17, 4:12 PM MDTSevere Thunderstorm WarningGGWDawson, Prairie, Wibaux63 min
Jun 17, 4:26 PM MDTSevere Thunderstorm WarningUNRButte, Harding79 min
Jun 17, 4:31 PM MDTSevere Thunderstorm WarningBYZCarter29 min
Jun 17, 4:42 PM MDTSevere Thunderstorm WarningBYZFallon33 min
Jun 17, 5:16 PM MDTTornado WarningUNRButte, Harding59 min
Jun 17, 5:56 PM MDTSevere Thunderstorm WarningGGWGarfield, McCone, Valley64 min
Jun 17, 6:12 PM MDTTornado WarningUNRButte48 min
Jun 17, 6:14 PM MDTSevere Thunderstorm WarningUNRHarding61 min
Jun 17, 6:57 PM MDTSevere Thunderstorm WarningUNRButte63 min
Jun 17, 7:10 PM MDTSevere Thunderstorm WarningUNRHarding65 min
Jun 17, 7:53 PM MDTSevere Thunderstorm WarningUNRButte97 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

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 6.5 hours before the alert went out and 261 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.

Skew-T log-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 12:00Z on 2014-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 12:00Z on 2014-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 164 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1178 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
164 m²/s²
0-3 km storm-relative helicity
170 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 16, 6:49 PM MDTMesoscale DiscussionSPCDawson, Richland86 min
Jun 17, 5:04 AM MDTMesoscale DiscussionSPCGarfield, Prairie86 min
Jun 17, 11:40 AM MDTMesoscale DiscussionSPCCarter, Custer, Dawson, Fallon, Garfield, Powder River and 2 more2 hr
Jun 17, 2:22 PM MDTMesoscale DiscussionSPCCarter, Custer, Dawson, Fallon, McCone, Prairie and 2 more113 min
Jun 16, 6:47 PM MDTMesoscale DiscussionSPCBon Homme, Charles Mix, Davison, Douglas, Gregory, Hanson and 8 more58 min
Jun 16, 7:37 PM MDTMesoscale DiscussionSPCBon Homme, Charles Mix, Davison, Douglas, Gregory, Hanson and 8 more83 min
Jun 16, 8:56 PM MDTSevere Thunderstorm WatchSPCUnion5 hr
Jun 16, 10:11 PM MDTMesoscale DiscussionSPCUnion64 min
Jun 17, 3:53 PM MDTTornado WatchSPCMellette, Todd, Tripp6 hr
Jun 17, 4:12 PM MDTMesoscale DiscussionSPCBon Homme, Charles Mix, Clay, Davison, Douglas, Hanson and 7 more2 hr
Jun 17, 5:02 PM MDTMesoscale DiscussionSPCBennett, Butte, Harding, Jackson, Meade, Oglala Lakota and 1 more88 min
Jun 17, 5:48 PM MDTTornado WatchSPCBon Homme, Clay, Hanson, Hutchinson, Lake, Lincoln and 7 more6 hr

Nearby

Tornado Watches in South Dakota, 2014Tornado Watches in Montana, 2014Tornado Watches in North Dakota, 2014Every tornado watch in 2014

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.