Alert archive / North Dakota / Mesoscale Discussions in 2007

Mesoscale Discussion 1580

July 25, 200711 counties in Minnesota; 16 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 25, 2007, 8:59 PM CDT for 11 counties in Minnesota; 16 counties in North Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 25, 2007, 8:59 PM CDT (01:59 UTC)
Expired: Jul 25, 2007, 11:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 27 counties

Beltrami County, MN, Clearwater County, MN, Kittson County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, 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), 73 km from the middle of the area, began a volume at 02:00 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

International Fa, MN (KINL), launched 00:00Z, 2.0 hours before the alert went out and 264 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: 901 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1679 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 25 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
Jul 25, 11:24 PM CDT	Mesoscale Discussion	SPC	Beltrami, Clearwater, Kittson, Lake of the Woods, Mahnomen, Marshall and 5 more	96 min
Jul 26, 12:55 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Blue Earth, Brown, Carlton and 30 more	65 min
Jul 26, 1:16 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Anoka, Benton, Blue Earth, Brown, Carlton and 36 more	8 hr
Jul 26, 2:58 PM CDT	Mesoscale Discussion	SPC	Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 3 more	92 min
Jul 26, 3:43 PM CDT	Severe Thunderstorm Watch	SPC	Dodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more	7 hr
Jul 26, 4:05 PM CDT	Mesoscale Discussion	SPC	Anoka, Blue Earth, Brown, Carver, Chisago, Cottonwood and 26 more	55 min
Jul 25, 7:24 PM CDT	Mesoscale Discussion	SPC	Emmons, Kidder, Logan	96 min

Nearby

Mesoscale Discussions in North Dakota, 2007 Mesoscale Discussions in Minnesota, 2007 Every mesoscale discussion in 2007

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.