Alert archive / Minnesota / Mesoscale Discussions in 2015

Mesoscale Discussion 1735

August 22, 201516 counties in Iowa; 30 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Aug 22, 2015, 5:52 PM CDT for 16 counties in Iowa; 30 counties in Minnesota. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Aug 22, 2015, 5:52 PM CDT (22:52 UTC)
Expired
Aug 22, 2015, 7:15 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 46 counties

Buena Vista County, IA, Cerro Gordo County, IA, Clay County, IA, Emmet County, IA, Franklin County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Faribault County, MN, Freeborn County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Nicollet County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 59 km from the middle of the area, began a volume at 22:56 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

Minneapolis, MN (KMPX), launched 12:00Z, 10.9 hours before the alert went out and 57 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 2015-08-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 445 joules per kilogram.LCLLFCEL10008507005003002001001 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 2015-08-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
445 J/kg
Mixed-layer CIN
-348 J/kg
Mixed-layer LCL
1017 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
65 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 22, 2:13 PM CDTMesoscale DiscussionSPCAudubon, Boone, Buena Vista, Calhoun, Carroll, Cerro Gordo and 33 more62 min
Aug 22, 2:35 PM CDTTornado WatchSPCBuena Vista, Calhoun, Cerro Gordo, Cherokee, Clay, Dickinson and 21 more7 hr
Aug 22, 2:55 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 19 more65 min
Aug 22, 3:48 PM CDTTornado WatchSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 25 more8 hr
Aug 22, 6:12 PM CDTMesoscale DiscussionSPCAllamakee, Bremer, Butler, Chickasaw, Clayton, Fayette and 4 more63 min
Aug 22, 6:21 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Carroll, Cass, Clarke and 15 more84 min
Aug 22, 2:35 PM CDTMesoscale DiscussionSPCAitkin, Becker, Beltrami, Cass, Clay, Clearwater and 18 more55 min
Aug 22, 2:56 PM CDTTornado WatchSPCAitkin, Becker, Beltrami, Carlton, Cass, Clay and 20 more8 hr
Aug 22, 5:42 PM CDTMesoscale DiscussionSPCAitkin, Becker, Beltrami, Carlton, Cass, Clearwater and 16 more93 min

Nearby

Mesoscale Discussions in Minnesota, 2015Mesoscale Discussions in Iowa, 2015Every mesoscale discussion in 2015

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.