Alert archive / North Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 2245

August 25, 200318 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 25, 2003, 3:53 AM CDT for 18 counties in North Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 25, 2003, 3:53 AM CDT (08:53 UTC)
Expired: Aug 25, 2003, 6:00 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

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

The radar

The Fargo/Grand Forks radar (KMVX), 114 km from the middle of the area, began a volume at 08:54 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

Aberdeen, SD (KABR), launched 00:00Z, 8.9 hours before the alert went out and 347 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: 78 J/kg
Mixed-layer CIN: -234 J/kg
Mixed-layer LCL: 2411 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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
Aug 25, 4:43 PM CDT	Mesoscale Discussion	SPC	Grand Forks	62 min
Aug 25, 5:00 PM CDT	Tornado Watch	SPC	Grand Forks, Nelson, Pembina, Traill, Walsh	5 hr
Aug 25, 6:21 PM CDT	Mesoscale Discussion	SPC	Dickey, Ransom, Richland, Sargent	54 min

Nearby

Mesoscale Discussions in North Dakota, 2003 Every mesoscale discussion 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; radar from the NEXRAD Level II archive.