Alert archive / Minnesota / Mesoscale Discussions in 2015

Mesoscale Discussion 1693

August 16, 20155 states

The Storm Prediction Center issued this mesoscale discussion at Aug 16, 2015, 4:01 PM CDT for 5 states. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Aug 16, 2015, 4:01 PM CDT (21:01 UTC)
Expired
Aug 16, 2015, 6:00 PM CDT
In force
119 min
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 65 counties

Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Hancock County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Sioux County, IA, Winnebago County, IA, Woodbury County, IA, Worth County, IA, Anoka County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Chisago County, MN, Cottonwood County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Jackson County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Nicollet County, MN, Nobles County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Burt County, NE, Cedar County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Stanton County, NE, Thurston County, NE, Wayne County, NE, Clay County, SD, Lincoln County, SD, Union County, SD, Pierce County, WI, Polk County, WI, Saint Croix County, WI

The radar

The Sioux Falls radar (KFSD), 150 km from the middle of the area, began a volume at 21:01 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, 9.0 hours before the alert went out and 188 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 2015-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 2015-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1027 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
88 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 15, 9:26 PM CDTMesoscale DiscussionSPCClay, Marshall, Norman, Pennington, Polk, Red Lake94 min
Aug 15, 11:13 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Douglas, Grant and 9 more62 min
Aug 15, 7:01 PM CDTMesoscale DiscussionSPCArthur, Boyd, Brown, Cherry, Garden, Grant and 7 more89 min
Aug 16, 1:08 PM CDTMesoscale DiscussionSPCKimball3 hr
Aug 16, 2:42 PM CDTMesoscale DiscussionSPCAdams, Boone, Buffalo, Dawson, Franklin, Frontier and 15 more2 hr
Aug 16, 6:24 PM CDTMesoscale DiscussionSPCBanner, Box Butte, Scotts Bluff, Sioux2 hr

Nearby

Mesoscale Discussions in Minnesota, 2015Mesoscale Discussions in Iowa, 2015Mesoscale Discussions in Nebraska, 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.