Alert archive / South Dakota / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 362

June 27, 20149 counties in Nebraska; 15 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 27, 2014, 4:17 PM MDT for 9 counties in Nebraska; 15 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 27, 2014, 4:17 PM MDT (22:17 UTC)
Expired: Jun 27, 2014, 10:40 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

Arthur County, NE, Cherry County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, Logan County, NE, McPherson County, NE, Sheridan County, NE, Thomas County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Mellette County, SD, Pennington County, SD, Perkins County, SD, Todd County, SD, Tripp County, SD, Ziebach County, SD

The radar

The North Platte radar (KLNX), 156 km from the middle of the area, began a volume at 22:19 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: 2%
Ten or more severe wind reports: 30%
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: 30%
Six or more combined severe hail and wind reports: 60%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 27, 4:38 PM MDT	Severe Thunderstorm Warning	UNR	Fall River	42 min
Jun 27, 4:52 PM MDT	Severe Thunderstorm Warning	UNR	Meade	53 min
Jun 27, 5:18 PM MDT	Severe Thunderstorm Warning	UNR	Custer	57 min
Jun 27, 5:34 PM MDT	Severe Thunderstorm Warning	UNR	Bennett	47 min
Jun 27, 5:44 PM MDT	Severe Thunderstorm Warning	UNR	Butte, Harding	61 min
Jun 27, 5:47 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade, Pennington	58 min
Jun 27, 6:04 PM MDT	Severe Thunderstorm Warning	UNR	Custer, Pennington	56 min
Jun 27, 6:10 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln, Logan, McPherson	50 min
Jun 27, 6:38 PM MDT	Severe Thunderstorm Warning	LBF	Custer, Lincoln, Logan	52 min
Jun 27, 6:57 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith, Lincoln, McPherson	37 min
Jun 27, 7:04 PM MDT	Severe Thunderstorm Warning	LBF	Hooker, Lincoln, Logan, McPherson, Thomas	41 min
Jun 27, 7:09 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Lincoln, Logan, Thomas	51 min
Jun 27, 7:29 PM MDT	Flash Flood Warning	UNR	Perkins	6 hr
Jun 27, 7:36 PM MDT	Flash Flood Warning	UNR	Perkins	6 hr
Jun 27, 7:37 PM MDT	Severe Thunderstorm Warning	UNR	Haakon, Jackson, Pennington	68 min
Jun 27, 7:43 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Hooker, Thomas	47 min
Jun 27, 7:44 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Loup, Thomas	46 min
Jun 27, 9:29 PM MDT	Severe Thunderstorm Warning	UNR	Mellette, Todd, Tripp	76 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

Rapid City, SD (KRAP), launched 12:00Z, 10.3 hours before the alert went out and 153 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1804 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: -3 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.

Issued	Product	Office	Counties	Lasted
Jun 26, 8:00 PM MDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Chase, Cheyenne, Dawes and 10 more	90 min
Jun 26, 9:39 PM MDT	Severe Thunderstorm Watch	SPC	Chase, Dundy, Frontier, Hayes, Hitchcock, Lincoln and 1 more	3 hr
Jun 26, 10:55 PM MDT	Mesoscale Discussion	SPC	Arthur, Box Butte, Chase, Dundy, Frontier, Garden and 9 more	95 min
Jun 27, 12:37 AM MDT	Mesoscale Discussion	SPC	Buffalo, Custer, Dawson, Frontier, Furnas, Gosper and 7 more	23 min
Jun 27, 12:05 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Deuel, Kimball, Morrill and 2 more	115 min
Jun 27, 12:48 PM MDT	Severe Thunderstorm Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more	6 hr
Jun 27, 2:19 PM MDT	Mesoscale Discussion	SPC	Arthur, Chase, Deuel, Dundy, Frontier, Furnas and 8 more	86 min
Jun 27, 2:47 PM MDT	Tornado Watch	SPC	Chase, Deuel, Dundy, Frontier, Furnas, Gosper and 6 more	6 hr
Jun 27, 3:57 PM MDT	Mesoscale Discussion	SPC	Blaine, Brown, Cherry, Custer, Dawes, Garfield and 10 more	93 min
Jun 27, 5:06 PM MDT	Mesoscale Discussion	SPC	Chase, Deuel, Dundy, Frontier, Furnas, Gosper and 6 more	84 min
Jun 27, 5:47 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Kimball and 3 more	58 min
Jun 26, 8:13 PM MDT	Mesoscale Discussion	SPC	Butte, Custer, Harding, Lawrence, Meade, Pennington and 1 more	62 min
Jun 27, 1:54 PM MDT	Mesoscale Discussion	SPC	Marshall, Roberts	2 hr

Nearby

Severe Thunderstorm Watches in South Dakota, 2014 Severe Thunderstorm Watches in Nebraska, 2014 Every severe thunderstorm 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; radar from the NEXRAD Level II archive.