Alert archive / South Dakota / Mesoscale Discussions in 2014

Mesoscale Discussion 1065

June 18, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2014, 3:29 PM CDT for 4 states. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Jun 18, 2014, 3:29 PM CDT (20:29 UTC)
Expired
Jun 18, 2014, 5:00 PM CDT
In force
91 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 45 counties

Lyon County, IA, Plymouth County, IA, Sioux County, IA, Rock County, MN, Antelope County, NE, Boyd County, NE, Cedar County, NE, Dakota County, NE, Dixon County, NE, Holt County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Rock County, NE, Thurston County, NE, Wayne County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clark County, SD, Clay County, SD, Codington County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 58 km from the middle of the area, began a volume at 20:28 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

Aberdeen, SD (KABR), launched 12:00Z, 8.5 hours before the alert went out and 177 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, Aberdeen, SD at 12:00Z on 2014-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 826 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, Aberdeen, SD at 12:00Z on 2014-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 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
826 J/kg
Mixed-layer CIN
-149 J/kg
Mixed-layer LCL
731 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.9

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
Jun 17, 7:44 PM CDTMesoscale DiscussionSPCAllamakee, Howard, Winneshiek2 hr
Jun 17, 9:38 PM CDTMesoscale DiscussionSPCClinton, Jackson97 min
Jun 17, 10:13 PM CDTSevere Thunderstorm WatchSPCAllamakee, Buchanan, Chickasaw, Clayton, Clinton, Delaware and 8 more6 hr
Jun 17, 10:18 PM CDTMesoscale DiscussionSPCCherokee, Clay, Dickinson, Ida, Lyon, O'Brien and 4 more57 min
Jun 17, 11:01 PM CDTMesoscale DiscussionSPCPlymouth, Sioux29 min
Jun 17, 11:23 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Emmet, Hancock and 11 more37 min
Jun 17, 11:39 PM CDTTornado WatchSPCBlack Hawk, Bremer, Buena Vista, Butler, Calhoun, Cerro Gordo and 25 more5 hr
Jun 18, 1:52 AM CDTMesoscale DiscussionSPCBoone, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 27 more83 min
Jun 18, 3:07 AM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Chickasaw and 11 more53 min
Jun 18, 3:47 AM CDTSevere Thunderstorm WatchSPCAllamakee, Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo and 16 more4 hr
Jun 18, 5:36 AM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Clayton and 12 more54 min
Jun 18, 6:23 PM CDTTornado WatchSPCLyon, Plymouth, Sioux, Woodbury5 hr
Jun 17, 10:36 PM CDTMesoscale DiscussionSPCAnoka, Blue Earth, Brown, Carver, Chisago, Dakota and 16 more84 min
Jun 17, 8:29 PM CDTMesoscale DiscussionSPCCedar31 min
Jun 17, 7:33 PM CDTMesoscale DiscussionSPCButte, Harding27 min
Jun 17, 8:58 PM CDTSevere Thunderstorm WatchSPCButte, Custer, Fall River, Haakon, Harding, Lawrence and 4 more5 hr
Jun 18, 1:19 AM CDTMesoscale DiscussionSPCButte, Corson, Custer, Dewey, Haakon, Lawrence and 4 more56 min
Jun 18, 4:45 AM CDTMesoscale DiscussionSPCCampbell, Corson, Dewey, Haakon, Hughes, Hyde and 10 more90 min
Jun 18, 1:13 PM CDTMesoscale DiscussionSPCBeadle, Brown, Campbell, Corson, Dewey, Edmunds and 10 more92 min
Jun 18, 1:28 PM CDTTornado WatchSPCBuffalo, Campbell, Corson, Dewey, Edmunds, Faulk and 13 more9 hr
Jun 18, 5:23 PM CDTMesoscale DiscussionSPCBrown, Campbell, Edmunds, McPherson, Marshall, Walworth97 min

Nearby

Mesoscale Discussions in South Dakota, 2014Mesoscale Discussions in Nebraska, 2014Mesoscale Discussions in Iowa, 2014Every mesoscale discussion in 2014

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.