Alert archive / North Dakota / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 753

July 17, 20038 counties in Montana; 11 counties in North Dakota; Harding County, Perkins County, Ziebach County, South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jul 17, 2003, 2:05 PM MDT for 8 counties in Montana; 11 counties in North Dakota; Harding County, Perkins County, Ziebach County, South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 17, 2003, 2:05 PM MDT (20:05 UTC)
Expired
Jul 17, 2003, 8:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center
All 22 counties

Carter County, MT, Dawson County, MT, Fallon County, MT, McCone County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Dunn County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McKenzie County, ND, Slope County, ND, Stark County, ND, Williams County, ND, Harding County, SD, Perkins County, SD, Ziebach County, SD

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 17, 4:49 PM MDTSevere Thunderstorm WarningBISGolden Valley41 min
Jul 17, 5:32 PM MDTSevere Thunderstorm WarningBISGolden Valley, Slope58 min
Jul 17, 6:25 PM MDTSevere Thunderstorm WarningBISBowman, Slope50 min
Jul 17, 7:05 PM MDTSevere Thunderstorm WarningUNRHarding85 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, 8.1 hours before the alert went out and 220 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 2003-07-17Temperature 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 2003-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.19395878Sfc1 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
1206 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
107 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 17, 1:40 PM MDTMesoscale DiscussionSPCCarter, Custer, Dawson, Fallon, McCone, Powder River and 3 more65 min

Nearby

Severe Thunderstorm Watches in North Dakota, 2003Severe Thunderstorm Watches in Montana, 2003Severe Thunderstorm Watches in South Dakota, 2003Every severe thunderstorm watch in 2003

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.