Alert archive / North Dakota / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 671

July 24, 20054 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 24, 2005, 1:50 PM MDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jul 24, 2005, 1:50 PM MDT (19:50 UTC)
Expired
Jul 24, 2005, 8:54 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center

Counties Carter County, MT, Adams County, ND, Bowman County, ND, Grant County, ND, Hettinger County, ND, Slope County, ND, Butte County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Perkins County, SD, Crook County, WY

The radar

The Rapid City radar (KUDX), 167 km from the middle of the area, began a volume at 19:51 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 24, 2:09 PM MDTSevere Thunderstorm WarningBISHettinger, Stark38 min
Jul 24, 2:13 PM MDTSevere Thunderstorm WarningUNRHarding32 min
Jul 24, 2:29 PM MDTSevere Thunderstorm WarningUNRPerkins46 min
Jul 24, 2:34 PM MDTSevere Thunderstorm WarningBISGrant, Morton57 min
Jul 24, 3:37 PM MDTSevere Thunderstorm WarningUNRHarding53 min
Jul 24, 4:23 PM MDTSevere Thunderstorm WarningUNRHarding82 min
Jul 24, 4:48 PM MDTSevere Thunderstorm WarningUNRCrook72 min
Jul 24, 5:29 PM MDTSevere Thunderstorm WarningUNRPerkins61 min
Jul 24, 5:40 PM MDTSevere Thunderstorm WarningUNRButte65 min
Jul 24, 6:00 PM MDTSevere Thunderstorm WarningUNRLawrence48 min
Jul 24, 6:06 PM MDTSevere Thunderstorm WarningUNRCrook60 min
Jul 24, 6:27 PM MDTSevere Thunderstorm WarningUNRPerkins48 min
Jul 24, 6:32 PM MDTSevere Thunderstorm WarningUNRHarding59 min
Jul 24, 6:44 PM MDTSevere Thunderstorm WarningUNRButte18 min
Jul 24, 7:18 PM MDTSevere Thunderstorm WarningUNRLawrence57 min
Jul 24, 7:37 PM MDTSevere Thunderstorm WarningUNRPerkins53 min
Jul 24, 8:32 PM MDTSevere Thunderstorm WarningUNRMeade60 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 12:00Z, 7.8 hours before the alert went out and 243 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 12:00Z on 2005-07-24Temperature 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, Bismarck Municip, ND at 12:00Z on 2005-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.1939587897Sfc1 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
1962 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
92 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
Jul 24, 1:14 PM MDTMesoscale DiscussionSPCCarter2 hr
Jul 24, 2:14 AM MDTMesoscale DiscussionSPCAurora, Brule, Davison, Gregory, Jerauld, Kingsbury and 3 more91 min
Jul 24, 2:30 AM MDTSevere Thunderstorm WatchSPCAurora, Brookings, Brule, Buffalo, Charles Mix, Davison and 13 more2 hr
Jul 24, 4:22 AM MDTMesoscale DiscussionSPCAurora, Brookings, Brule, Buffalo, Charles Mix, Davison and 13 more83 min
Jul 24, 9:33 AM MDTMesoscale DiscussionSPCBon Homme, Charles Mix, Clay, Douglas, Hanson, Hutchinson and 7 more117 min
Jul 24, 3:10 PM MDTMesoscale DiscussionSPCClay, Union95 min
Jul 24, 3:50 PM MDTSevere Thunderstorm WatchSPCClay, Union, Yankton5 hr

Nearby

Severe Thunderstorm Watches in North Dakota, 2005Severe Thunderstorm Watches in South Dakota, 2005Severe Thunderstorm Watches in Montana, 2005Every severe thunderstorm watch in 2005

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.