Alert archive / North Dakota / Mesoscale Discussions in 2005

Mesoscale Discussion 767

May 7, 200519 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at May 7, 2005, 9:37 PM CDT for 19 counties in North Dakota. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: May 7, 2005, 9:37 PM CDT (02:37 UTC)
Expired: May 7, 2005, 10:30 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

Counties Barnes County, ND, Benson County, ND, Burleigh County, ND, Cass County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, Nelson County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Ransom County, ND, Sheridan County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Wells County, ND

The radar

The Bismarck radar (KBIS), 128 km from the middle of the area, began a volume at 02:37 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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.6 hours before the alert went out and 124 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: 92 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1597 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 8, 1:10 PM CDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, Emmons, Foster, Griggs and 10 more	3 hr
May 8, 1:50 PM CDT	Tornado Watch	SPC	Dickey, LaMoure, Ransom, Richland, Sargent	7 hr
May 8, 3:50 PM CDT	Tornado Watch	SPC	Barnes, Benson, Cass, Cavalier, Eddy, Foster and 12 more	5 hr
May 8, 5:27 PM CDT	Mesoscale Discussion	SPC	Barnes, Benson, Cass, Dickey, Eddy, Foster and 13 more	63 min

Nearby

Mesoscale Discussions in North Dakota, 2005 Every mesoscale discussion 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.