Alert archive / North Dakota / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 551

June 25, 201128 counties in North Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 25, 2011, 7:01 PM MDT for 28 counties in North Dakota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 25, 2011, 7:01 PM MDT (01:01 UTC)
Expired
Jun 26, 2011, 12:00 AM MDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 28 counties

Adams County, ND, Benson County, ND, Burleigh County, ND, Cavalier County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Grant County, ND, Griggs County, ND, Hettinger County, ND, Kidder County, ND, Logan County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Nelson County, ND, Oliver County, ND, Pembina County, ND, Ramsey County, ND, Sheridan County, ND, Sioux County, ND, Stark County, ND, Stutsman County, ND, Towner County, ND, Walsh County, ND, Wells County, ND

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
20%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 25, 7:04 PM MDTSevere Thunderstorm WarningBISWells56 min
Jun 25, 7:32 PM MDTSevere Thunderstorm WarningFGFBenson, Eddy58 min
Jun 25, 7:43 PM MDTFlash Flood WarningBISPierce, Wells4 hr
Jun 25, 7:47 PM MDTSevere Thunderstorm WarningBISMcLean, Sheridan58 min
Jun 25, 8:01 PM MDTSevere Thunderstorm WarningFGFBenson, Ramsey, Towner59 min
Jun 25, 8:02 PM MDTSevere Thunderstorm WarningBISFoster, Wells58 min
Jun 25, 8:06 PM MDTSevere Thunderstorm WarningBISMorton54 min
Jun 25, 8:29 PM MDTSevere Thunderstorm WarningFGFBenson, Eddy46 min
Jun 25, 9:00 PM MDTSevere Thunderstorm WarningBISGrant, Morton27 min
Jun 25, 9:02 PM MDTSevere Thunderstorm WarningFGFBenson, Eddy, Nelson, Ramsey46 min
Jun 25, 9:04 PM MDTSevere Thunderstorm WarningBISFoster26 min
Jun 25, 9:17 PM MDTSevere Thunderstorm WarningFGFEddy, Nelson58 min
Jun 25, 9:43 PM MDTFlash Flood WarningFGFEddy7 hr

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, 1.0 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2011-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1619 joules per kilogram.LCLLFCEL10008507005003002001001 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, Bismarck Municip, ND at 00:00Z on 2011-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 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
1619 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
1448 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 25, 9:47 PM MDTMesoscale DiscussionSPCEmmons, Grand Forks, Griggs, Logan, Stutsman88 min
Jun 26, 5:08 AM MDTMesoscale DiscussionSPCAdams, Sioux97 min
Jun 26, 11:35 AM MDTMesoscale DiscussionSPCCass, Dickey, Emmons, LaMoure, Logan, McIntosh and 1 more85 min

Nearby

Severe Thunderstorm Watches in North Dakota, 2011Every severe thunderstorm watch in 2011

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.