Alert archive / Arkansas / Mesoscale Discussions in 2013

Mesoscale Discussion 1606

August 3, 20134 states

The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2013, 4:23 AM CDT for 4 states. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Aug 3, 2013, 4:23 AM CDT (09:23 UTC)
Expired: Aug 3, 2013, 6:00 AM CDT
In force: 97 min
Issued by: the Storm Prediction Center

All 45 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Conway County, AR, Faulkner County, AR, Fulton County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Cherokee County, KS, Barry County, MO, Barton County, MO, Christian County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Howell County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Oregon County, MO, Ozark County, MO, Polk County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO, Craig County, OK, Ottawa County, OK

The radar

The Springfield radar (KSGF), 100 km from the middle of the area, began a volume at 09:26 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 00:00Z, 9.4 hours before the alert went out and 97 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: 2924 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 955 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 239 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 12.4

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
Aug 2, 7:15 PM CDT	Severe Thunderstorm Watch	SPC	Benton	7 hr
Aug 2, 9:47 PM CDT	Mesoscale Discussion	SPC	Clay, Fulton, Randolph, Sharp	58 min
Aug 3, 1:15 AM CDT	Mesoscale Discussion	SPC	Baxter, Clay, Craighead, Fulton, Greene, Izard and 4 more	90 min
Aug 2, 10:20 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Barton, Bourbon, Butler, Chase and 34 more	55 min
Aug 2, 11:43 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 23 more	92 min
Aug 3, 1:29 AM CDT	Severe Thunderstorm Watch	SPC	Bourbon, Cherokee, Crawford, Linn, Miami	6 hr
Aug 3, 2:06 PM CDT	Mesoscale Discussion	SPC	Grant, Hamilton, Haskell, Morton, Seward, Stanton and 1 more	84 min
Aug 3, 3:40 PM CDT	Severe Thunderstorm Watch	SPC	Cimarron	7 hr

Nearby

Mesoscale Discussions in Arkansas, 2013 Mesoscale Discussions in Missouri, 2013 Mesoscale Discussions in Oklahoma, 2013 Every mesoscale discussion in 2013

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.