Alert archive / South Dakota / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 342

July 6, 20164 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 6, 2016, 7:38 PM CDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 6, 2016, 7:38 PM CDT (00:38 UTC)
Expired: Jul 7, 2016, 2:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 70 kt

All 68 counties

Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Antelope County, NE, Boone County, NE, Burt County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clark County, SD, Clay County, SD, Codington County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Faulk County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 75 km from the middle of the area, began a volume at 00:38 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: 90%
One or more gusts of 65 knots or more: 60%
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: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jul 6, 8:45 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	30 min
Jul 6, 8:56 PM CDT	Severe Thunderstorm Warning	FSD	Brule	34 min
Jul 6, 8:57 PM CDT	Severe Thunderstorm Warning	OAX	Knox	48 min
Jul 6, 9:06 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Brule, Jerauld	24 min
Jul 6, 9:09 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix, Hutchinson	36 min
Jul 6, 9:24 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox	51 min
Jul 6, 9:38 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Hutchinson, Turner, Yankton	37 min
Jul 6, 9:39 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Knox	51 min
Jul 6, 10:05 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Kingsbury, Lake, Miner, Sanborn	40 min
Jul 6, 10:08 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	52 min
Jul 6, 10:10 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Turner, Union, Yankton	50 min
Jul 6, 10:12 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Madison, Pierce	63 min
Jul 6, 10:18 PM CDT	Severe Thunderstorm Warning	OAX	Antelope	27 min
Jul 6, 10:21 PM CDT	Severe Thunderstorm Warning	FSD	Hanson, McCook	39 min
Jul 6, 10:24 PM CDT	Severe Thunderstorm Warning	OAX	Cedar, Wayne	51 min
Jul 6, 10:39 PM CDT	Severe Thunderstorm Warning	FSD	Brookings, Kingsbury, Lake, Moody	36 min
Jul 6, 10:53 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	37 min
Jul 6, 10:56 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Stanton, Thurston, Wayne	49 min
Jul 6, 11:31 PM CDT	Severe Thunderstorm Warning	OAX	Monona	59 min
Jul 6, 11:31 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Madison, Platte	29 min
Jul 6, 11:52 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Clay, O'Brien	38 min
Jul 6, 11:58 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Dodge, Platte, Saunders	32 min
Jul 6, 11:59 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Cuming, Dodge, Platte, Stanton	31 min
Jul 7, 12:08 AM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	52 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, 0.6 hours before the alert went out and 145 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: 2121 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 7, 12:30 AM CDT	Mesoscale Discussion	SPC	Audubon, Benton, Black Hawk, Boone, Bremer, Buchanan and 51 more	90 min
Jul 7, 12:47 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 37 more	4 hr
Jul 7, 1:22 AM CDT	Mesoscale Discussion	SPC	Decatur, Fremont, Page, Ringgold, Taylor, Wayne	83 min
Jul 7, 1:37 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 11 more	6 hr
Jul 7, 3:52 AM CDT	Mesoscale Discussion	SPC	Allamakee, Black Hawk, Bremer, Buchanan, Chickasaw, Fayette and 8 more	83 min
Jul 7, 4:27 AM CDT	Mesoscale Discussion	SPC	Adams, Appanoose, Clarke, Davis, Decatur, Lucas and 6 more	93 min
Jul 7, 5:26 AM CDT	Mesoscale Discussion	SPC	Appanoose, Clarke, Davis, Decatur, Lucas, Monroe and 2 more	2 hr
Jul 7, 6:01 AM CDT	Severe Thunderstorm Watch	SPC	Des Moines, Henry, Jefferson, Lee, Van Buren	6 hr
Jul 7, 8:10 AM CDT	Mesoscale Discussion	SPC	Des Moines, Lee	95 min
Jul 7, 1:50 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 41 more	115 min
Jul 7, 3:54 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 37 more	5 hr
Jul 7, 6:30 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 39 more	2 hr
Jul 7, 3:10 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Cass, Clay, Clearwater, Hubbard and 9 more	2 hr
Jul 6, 9:28 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Buffalo, Butler, Clay, Colfax and 29 more	2 hr
Jul 6, 9:47 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Clay, Custer, Dawson, Fillmore and 20 more	5 hr
Jul 7, 2:31 AM CDT	Mesoscale Discussion	SPC	Franklin, Furnas, Harlan, Nuckolls, Red Willow, Thayer and 1 more	89 min
Jul 7, 2:40 PM CDT	Mesoscale Discussion	SPC	Adams, Banner, Buffalo, Chase, Cheyenne, Clay and 23 more	2 hr
Jul 7, 5:14 PM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Furnas, Gosper, Harlan and 3 more	3 hr

Nearby

Severe Thunderstorm Watches in South Dakota, 2016 Severe Thunderstorm Watches in Nebraska, 2016 Severe Thunderstorm Watches in Iowa, 2016 Every severe thunderstorm watch in 2016

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.