Alert archive / Minnesota / Mesoscale Discussions in 2011

Mesoscale Discussion 1623

July 15, 201120 counties in Minnesota; 4 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2011, 6:30 AM CDT for 20 counties in Minnesota; 4 counties in North Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 15, 2011, 6:30 AM CDT (11:30 UTC)
Expired
Jul 15, 2011, 8:30 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 24 counties

Benton County, MN, Carver County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Hennepin County, MN, Kandiyohi County, MN, McLeod County, MN, Meeker County, MN, Morrison County, MN, Otter Tail County, MN, Pope County, MN, Renville County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Todd County, MN, Wadena County, MN, Wilkin County, MN, Wright County, MN, Barnes County, ND, Cass County, ND, Ransom County, ND, Richland County, ND

The radar

The Minneapolis radar (KMPX), 182 km from the middle of the area, began a volume at 11:30 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 00:00Z, 11.5 hours before the alert went out and 180 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 00:00Z on 2011-07-15Temperature 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 00:00Z on 2011-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 square meters per square second.193958Sfc1 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
703 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
271 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.

IssuedProductOfficeCountiesLasted
Jul 15, 2:56 AM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Clay, Clearwater, Hubbard, Mahnomen and 8 more7 hr
Jul 15, 6:40 AM CDTSevere Thunderstorm WatchSPCAnoka, Benton, Carver, Chisago, Douglas, Hennepin and 14 more6 hr
Jul 15, 11:20 AM CDTMesoscale DiscussionSPCAnoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 30 more85 min
Jul 15, 2:21 PM CDTMesoscale DiscussionSPCBlue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 6 more114 min
Jul 15, 6:10 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Grant, Hubbard and 8 more65 min
Jul 14, 9:46 PM CDTMesoscale DiscussionSPCAdams, Emmons, Grant, Kidder, Logan, McIntosh and 1 more59 min
Jul 14, 11:01 PM CDTSevere Thunderstorm WatchSPCAdams, Billings, Bowman, Burke, Divide, Dunn and 14 more6 hr
Jul 14, 11:55 PM CDTMesoscale DiscussionSPCBarnes, Cass, Dickey, Emmons, Kidder, LaMoure and 6 more65 min
Jul 15, 2:54 AM CDTMesoscale DiscussionSPCAdams, Billings, Bottineau, Bowman, Burke, Divide and 12 more2 hr

Nearby

Mesoscale Discussions in Minnesota, 2011Mesoscale Discussions in North Dakota, 2011Every mesoscale discussion in 2011

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.