Alert archive / Oklahoma / Mesoscale Discussions in 2014

Mesoscale Discussion 1340

July 10, 20147 counties in Arkansas; 21 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2014, 5:07 PM CDT for 7 counties in Arkansas; 21 counties in Oklahoma. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2014, 5:07 PM CDT (22:07 UTC)
Expired: Jul 10, 2014, 7:00 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 28 counties

Hempstead County, AR, Howard County, AR, Little River County, AR, Montgomery County, AR, Pike County, AR, Polk County, AR, Sevier County, AR, Atoka County, OK, Canadian County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Johnston County, OK, Kingfisher County, OK, Latimer County, OK, Logan County, OK, McClain County, OK, McCurtain County, OK, Murray County, OK, Oklahoma County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK

The radar

The Western Arkansas radar (KSRX), 133 km from the middle of the area, began a volume at 22:08 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

Springfield, MO (KSGF), launched 12:00Z, 10.1 hours before the alert went out and 294 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1349 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 80 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.

Issued	Product	Office	Counties	Lasted
Jul 10, 2:39 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Kay, Major, Noble and 1 more	96 min

Nearby

Mesoscale Discussions in Oklahoma, 2014 Mesoscale Discussions in Arkansas, 2014 Every 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.