Alert archive / Minnesota / Mesoscale Discussions in 2007

Mesoscale Discussion 1745

August 13, 200744 counties in Minnesota; 7 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2007, 2:18 PM CDT for 44 counties in Minnesota; 7 counties in North Dakota. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Aug 13, 2007, 2:18 PM CDT (19:18 UTC)
Expired
Aug 13, 2007, 4:15 PM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 51 counties

Becker County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Clay County, MN, Clearwater County, MN, Cottonwood County, MN, Dakota County, MN, Douglas County, MN, Grant County, MN, Hennepin County, MN, Kandiyohi County, MN, Kittson County, MN, Le Sueur County, MN, Mahnomen County, MN, Marshall County, MN, McLeod County, MN, Meeker County, MN, Morrison County, MN, Nicollet County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Pope County, MN, Red Lake County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wadena County, MN, Waseca County, MN, Watonwan County, MN, Wilkin County, MN, Wright County, MN, Cass County, ND, Grand Forks County, ND, Nelson County, ND, Pembina County, ND, Steele County, ND, Traill County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 166 km from the middle of the area, began a volume at 19:20 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.3 hours before the alert went out and 249 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, Minneapolis, MN at 12:00Z on 2007-08-13Temperature 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, Minneapolis, MN at 12:00Z on 2007-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.1939587897117Sfc1 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
2331 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
56 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.

IssuedProductOfficeCountiesLasted
Aug 13, 12:11 PM CDTMesoscale DiscussionSPCBenton, Big Stone, Chippewa, Douglas, Grant, Kandiyohi and 12 more94 min
Aug 13, 2:57 PM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Clay, Clearwater, Grant, Hubbard and 9 more6 hr
Aug 13, 5:11 PM CDTMesoscale DiscussionSPCAnoka, Benton, Blue Earth, Brown, Carver, Chippewa and 37 more64 min
Aug 13, 6:59 PM CDTSevere Thunderstorm WatchSPCAitkin, Anoka, Benton, Brown, Carlton, Carver and 29 more7 hr
Aug 13, 3:16 AM CDTMesoscale DiscussionSPCDivide, Williams89 min
Aug 13, 8:45 AM CDTMesoscale DiscussionSPCBarnes, Benson, Bottineau, Cass, Cavalier, Dickey and 20 more60 min
Aug 13, 9:48 AM CDTSevere Thunderstorm WatchSPCBarnes, Benson, Cass, Cavalier, Dickey, Eddy and 18 more6 hr

Nearby

Mesoscale Discussions in Minnesota, 2007Mesoscale Discussions in North Dakota, 2007Every 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.