Alert archive / South Dakota / Severe Thunderstorm Watches in 2015

Severe Thunderstorm Watch 366

June 27, 20159 counties in Minnesota; 15 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 27, 2015, 5:11 PM CDT for 9 counties in Minnesota; 15 counties in South Dakota. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 27, 2015, 5:11 PM CDT (22:11 UTC)
Expired
Jun 28, 2015, 12:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 24 counties

Big Stone County, MN, Chippewa County, MN, Douglas County, MN, Lac qui Parle County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Yellow Medicine County, MN, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hyde County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD, Spink County, SD

The radar

The Aberdeen radar (KABR), 58 km from the middle of the area, began a volume at 22:11 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
20%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 27, 5:33 PM CDTSevere Thunderstorm WarningABRBrown, Edmunds, McPherson27 min
Jun 27, 5:59 PM CDTSevere Thunderstorm WarningABRBrown, Edmunds, McPherson, Spink46 min
Jun 27, 7:34 PM CDTSevere Thunderstorm WarningABRSpink24 min
Jun 27, 7:52 PM CDTSevere Thunderstorm WarningABRBig Stone, Traverse38 min
Jun 27, 8:30 PM CDTSevere Thunderstorm WarningABRBig Stone, Traverse60 min
Jun 27, 8:55 PM CDTSevere Thunderstorm WarningMPXLac qui Parle80 min
Jun 27, 9:09 PM CDTTornado Warning Tornado observedABRTraverse36 min
Jun 27, 9:22 PM CDTSevere Thunderstorm WarningMPXDouglas53 min
Jun 27, 9:37 PM CDTTornado WarningABRBig Stone, Traverse23 min
Jun 27, 9:52 PM CDTSevere Thunderstorm WarningMPXStevens53 min
Jun 27, 9:57 PM CDTSevere Thunderstorm WarningABRBig Stone, Traverse18 min
Jun 27, 10:01 PM CDTSevere Thunderstorm WarningMPXYellow Medicine29 min
Jun 27, 10:16 PM CDTSevere Thunderstorm WarningMPXPope44 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 12:00Z, 10.2 hours before the alert went out and 79 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, Aberdeen, SD at 12:00Z on 2015-06-27Temperature 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, Aberdeen, SD at 12:00Z on 2015-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.19395878Sfc1 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
1706 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
116 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 27, 2:01 PM CDTMesoscale DiscussionSPCBecker, Clay, Clearwater, Kittson, Lake of the Woods, Mahnomen and 7 more119 min
Jun 27, 2:42 PM CDTTornado WatchSPCBecker, Beltrami, Clay, Clearwater, Grant, Hubbard and 12 more7 hr
Jun 27, 4:45 PM CDTMesoscale DiscussionSPCBig Stone, Chippewa, Grant, Lac qui Parle, Lincoln, Lyon and 5 more90 min
Jun 27, 5:54 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Douglas, Grant and 14 more66 min

Nearby

Severe Thunderstorm Watches in South Dakota, 2015Severe Thunderstorm Watches in Minnesota, 2015Every severe thunderstorm watch in 2015

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.