Alert archive / South Dakota / Mesoscale Discussions in 2015

Mesoscale Discussion 1307

July 5, 20154 states

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2015, 3:46 PM CDT for 4 states. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Jul 5, 2015, 3:46 PM CDT (20:46 UTC)
Expired
Jul 5, 2015, 5:45 PM CDT
In force
119 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 58 counties

Lyon County, IA, Plymouth County, IA, Sioux County, IA, Lincoln County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Boyd County, NE, Brown County, NE, Cedar County, NE, Cherry County, NE, Dawes County, NE, Holt County, NE, Keya Paha County, NE, Knox County, NE, Rock County, NE, Sheridan County, NE, Aurora County, SD, Beadle County, SD, Bennett County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clay County, SD, Custer County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Fall River County, SD, Gregory County, SD, Haakon County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, Lyman County, SD, McCook County, SD, Meade County, SD, Mellette County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Oglala Lakota County, SD, Pennington County, SD, Sanborn County, SD, Todd County, SD, Tripp County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The North Platte radar (KLNX), 206 km from the middle of the area, began a volume at 20:49 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, 8.8 hours before the alert went out and 251 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 2015-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 357 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 2015-07-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
357 J/kg
Mixed-layer CIN
-280 J/kg
Mixed-layer LCL
2268 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
34 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

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
Jul 5, 9:54 AM CDTMesoscale DiscussionSPCBecker, Beltrami, Cass, Clay, Clearwater, Hubbard and 6 more96 min
Jul 5, 10:40 AM CDTSevere Thunderstorm WatchSPCBecker, Beltrami, Clay, Clearwater, Hubbard, Mahnomen and 5 more7 hr
Jul 5, 1:19 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Big Stone, Cass, Chippewa, Clay and 22 more86 min
Jul 5, 5:02 PM CDTMesoscale DiscussionSPCAitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 2 more118 min
Jul 5, 4:51 PM CDTSevere Thunderstorm WatchSPCArthur, Box Butte, Boyd, Brown, Cherry, Cheyenne and 10 more7 hr

Nearby

Mesoscale Discussions in South Dakota, 2015Mesoscale Discussions in Nebraska, 2015Mesoscale Discussions in Minnesota, 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.