Alert archive / South Dakota / Mesoscale Discussions in 2014

Mesoscale Discussion 1041

June 17, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2014, 2:22 PM MDT for 4 states. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
Jun 17, 2014, 2:22 PM MDT (20:22 UTC)
Expired
Jun 17, 2014, 4:15 PM MDT
In force
113 min
Issued by
the Storm Prediction Center
All 32 counties

Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, McCone County, MT, Prairie County, MT, Richland County, MT, Wibaux County, MT, Billings County, ND, Bowman County, ND, Golden Valley County, ND, Slope County, ND, Banner County, NE, Box Butte County, NE, Dawes County, NE, Garden County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD

The radar

The Rapid City radar (KUDX), 167 km from the middle of the area, began a volume at 20:23 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

Rapid City, SD (KRAP), launched 12:00Z, 8.4 hours before the alert went out and 169 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, Rapid City, SD at 12:00Z on 2014-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2446 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, Rapid City, SD at 12:00Z on 2014-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.19395878Sfc1 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
2446 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
487 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.1

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 16, 6:49 PM MDTMesoscale DiscussionSPCDawson, Richland86 min
Jun 17, 5:04 AM MDTMesoscale DiscussionSPCGarfield, Prairie86 min
Jun 17, 11:40 AM MDTMesoscale DiscussionSPCCarter, Custer, Dawson, Fallon, Garfield, Powder River and 2 more2 hr
Jun 17, 12:31 PM MDTTornado WatchSPCCarter, Custer, Dawson, Fallon, Garfield, McCone and 3 more7 hr
Jun 16, 8:11 PM MDTMesoscale DiscussionSPCAntelope, Burt, Cedar, Cuming, Dakota, Dixon and 9 more64 min
Jun 16, 8:56 PM MDTSevere Thunderstorm WatchSPCAntelope, Boone, Burt, Colfax, Cuming, Dakota and 9 more5 hr
Jun 16, 10:11 PM MDTMesoscale DiscussionSPCBurt, Colfax, Cuming, Dakota, Dixon, Dodge and 4 more64 min
Jun 17, 3:53 PM MDTTornado WatchSPCBlaine, Brown, Cherry, Grant, Hooker, Keya Paha and 3 more6 hr
Jun 17, 4:12 PM MDTMesoscale DiscussionSPCBoyd, Cedar, Knox2 hr
Jun 17, 5:48 PM MDTTornado WatchSPCAntelope, Cedar, Dakota, Dixon, Knox, Pierce and 2 more6 hr
Jun 16, 6:47 PM MDTMesoscale DiscussionSPCBon Homme, Charles Mix, Davison, Douglas, Gregory, Hanson and 8 more58 min
Jun 16, 7:37 PM MDTMesoscale DiscussionSPCBon Homme, Charles Mix, Davison, Douglas, Gregory, Hanson and 8 more83 min
Jun 17, 5:02 PM MDTMesoscale DiscussionSPCBennett, Butte, Harding, Jackson, Meade, Oglala Lakota and 1 more88 min

Nearby

Mesoscale Discussions in South Dakota, 2014Mesoscale Discussions in Nebraska, 2014Mesoscale Discussions in Montana, 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.