Alert archive / North Dakota / Mesoscale Discussions in 2008

Mesoscale Discussion 2279

September 23, 20087 counties in Minnesota; 14 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Sep 23, 2008, 1:37 AM CDT for 7 counties in Minnesota; 14 counties in North Dakota. It was in force for 23 min.

The area

The outline as issued.

The facts

Issued: Sep 23, 2008, 1:37 AM CDT (06:37 UTC)
Expired: Sep 23, 2008, 2:00 AM CDT
In force: 23 min
Issued by: the Storm Prediction Center

All 21 counties

Kittson County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Barnes County, ND, 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, Ramsey County, ND, Steele County, ND, Towner County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 49 km from the middle of the area, began a volume at 06:39 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, 6.6 hours before the alert went out and 260 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1686 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 150 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
Sep 22, 7:35 PM CDT	Severe Thunderstorm Watch	SPC	Kittson, Marshall, Pennington, Polk, Red Lake, Roseau	8 hr
Sep 22, 10:21 PM CDT	Mesoscale Discussion	SPC	Kittson, Marshall, Pennington, Polk, Red Lake, Roseau	54 min
Sep 23, 1:45 PM CDT	Mesoscale Discussion	SPC	Anoka, Blue Earth, Carlton, Carver, Chisago, Dakota and 19 more	2 hr
Sep 22, 10:58 PM CDT	Mesoscale Discussion	SPC	Sargent	62 min
Sep 23, 1:13 PM CDT	Mesoscale Discussion	SPC	Benson, Burleigh, Eddy, Emmons, Foster, Griggs and 16 more	2 hr

Nearby

Mesoscale Discussions in North Dakota, 2008 Mesoscale Discussions in Minnesota, 2008 Every mesoscale discussion in 2008

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.