Alert archive / North Dakota / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 698

August 2, 200516 counties in North Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Aug 2, 2005, 7:30 PM CDT for 16 counties in North Dakota. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Aug 2, 2005, 7:30 PM CDT (00:30 UTC)
Expired
Aug 2, 2005, 11:50 PM CDT
In force
4 hr
Issued by
the Storm Prediction Center

Counties Benson County, ND, Cavalier County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Rolette County, ND, Steele County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Wells County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 135 km from the middle of the area, began a volume at 00:30 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

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

IssuedProductOfficeCountiesLasted
Aug 2, 7:42 PM CDTSevere Thunderstorm WarningBISRolette65 min
Aug 2, 7:52 PM CDTSevere Thunderstorm WarningFGFBenson55 min
Aug 2, 8:15 PM CDTSevere Thunderstorm WarningBISPierce61 min
Aug 2, 8:28 PM CDTSevere Thunderstorm WarningFGFTowner48 min
Aug 2, 8:50 PM CDTSevere Thunderstorm WarningBISWells57 min
Aug 2, 9:04 PM CDTSevere Thunderstorm WarningFGFBenson56 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, 0.5 hours before the alert went out and 191 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 2005-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2315 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 2005-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 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
2315 J/kg
Mixed-layer CIN
-155 J/kg
Mixed-layer LCL
1569 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
6 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 2, 11:30 PM CDTMesoscale DiscussionSPCTraill60 min
Aug 3, 1:58 AM CDTMesoscale DiscussionSPCRichland, Sargent92 min

Nearby

Severe Thunderstorm Watches in North Dakota, 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.