Alert archive / North Dakota / Tornado Watches in 2010

Tornado Watch 470

July 14, 201011 counties in North Dakota; 4 counties in South Dakota

The Storm Prediction Center issued this tornado watch at Jul 14, 2010, 1:02 AM CDT for 11 counties in North Dakota; 4 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 14, 2010, 1:02 AM CDT (06:02 UTC)
Expired: Jul 14, 2010, 7:23 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 3 in
Strongest gust expected: 70 kt

Counties Barnes County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Brown County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD

The radar

The Bismarck radar (KBIS), 129 km from the middle of the area, began a volume at 06:03 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: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 30%
One or more gusts of 65 knots or more: 30%
Ten or more severe hail reports: 80%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jul 14, 1:14 AM CDT	Tornado Warning	BIS	Adams, Grant, Hettinger, Sioux	46 min
Jul 14, 1:25 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	50 min
Jul 14, 1:27 AM CDT	Tornado Warning	BIS	Emmons, Logan, McIntosh	48 min
Jul 14, 1:45 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton	60 min
Jul 14, 1:49 AM CDT	Flash Flood Warning	BIS	Burleigh, Dickey, Emmons, Grant, Kidder, LaMoure and 6 more	6 hr
Jul 14, 1:52 AM CDT	Tornado Warning	BIS	Emmons, Morton, Sioux	23 min
Jul 14, 2:00 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	45 min
Jul 14, 2:10 AM CDT	Tornado Warning	BIS	Grant, Morton, Sioux	35 min
Jul 14, 2:13 AM CDT	Tornado Warning	BIS	Dickey, LaMoure, Logan, McIntosh	32 min
Jul 14, 2:15 AM CDT	Tornado Warning	BIS	Emmons, Morton, Sioux	30 min
Jul 14, 2:27 AM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Logan, Stutsman	48 min
Jul 14, 2:34 AM CDT	Tornado Warning	BIS	Emmons, Logan, McIntosh	41 min
Jul 14, 2:40 AM CDT	Tornado Warning	BIS	Dickey, LaMoure, Logan, McIntosh	65 min
Jul 14, 2:42 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Grant, Morton, Sioux	63 min
Jul 14, 2:44 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Morton, Sioux	61 min
Jul 14, 2:58 AM CDT	Tornado Warning	BIS	Sioux	32 min
Jul 14, 3:02 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Ransom	58 min
Jul 14, 3:14 AM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Stutsman	31 min
Jul 14, 3:16 AM CDT	Tornado Warning	BIS	LaMoure, Logan	34 min
Jul 14, 3:30 AM CDT	Tornado Warning	FGF	Ransom, Sargent	60 min
Jul 14, 3:34 AM CDT	Severe Thunderstorm Warning	BIS	Emmons, Kidder, Logan	41 min
Jul 14, 3:43 AM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Logan, Stutsman	47 min
Jul 14, 3:50 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Richland	55 min
Jul 14, 4:06 AM CDT	Severe Thunderstorm Warning	BIS	Kidder, LaMoure, Logan, Stutsman	54 min
Jul 14, 4:15 AM CDT	Tornado Warning	FGF	Ransom, Richland, Sargent	44 min
Jul 14, 4:20 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Ransom	55 min
Jul 14, 4:24 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	51 min
Jul 14, 4:28 AM CDT	Tornado Warning	BIS	Emmons, Sioux	32 min
Jul 14, 4:29 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	61 min
Jul 14, 4:56 AM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Richland, Sargent	64 min
Jul 14, 5:37 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	53 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 6.0 hours before the alert went out and 125 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: 2253 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 916 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 13, 10:36 PM CDT	Mesoscale Discussion	SPC	Adams, Benson, Burleigh, Cavalier, Eddy, Emmons and 14 more	24 min
Jul 13, 10:58 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Barnes, Benson, Bowman, Burleigh, Cass and 28 more	7 hr
Jul 14, 12:44 AM CDT	Mesoscale Discussion	SPC	Dickey, Emmons, LaMoure, Logan, McIntosh, Ransom and 3 more	31 min
Jul 14, 3:00 AM CDT	Mesoscale Discussion	SPC	Adams, Barnes, Benson, Bowman, Burleigh, Cass and 36 more	90 min
Jul 14, 3:50 AM CDT	Tornado Watch	SPC	Barnes, Cass, Ransom, Richland, Sargent	5 hr

Nearby

Tornado Watches in North Dakota, 2010 Tornado Watches in South Dakota, 2010 Every tornado watch in 2010

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.