Alert archive / Oklahoma / Mesoscale Discussions in 2013

Mesoscale Discussion 723

May 20, 20134 counties in Kansas; 9 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 20, 2013, 2:44 AM CDT for 4 counties in Kansas; 9 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 20, 2013, 2:44 AM CDT (07:44 UTC)
Expired: May 20, 2013, 4:45 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Chautauqua County, KS, Cherokee County, KS, Labette County, KS, Montgomery County, KS, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Rogers County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 70 km from the middle of the area, began a volume at 07:46 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, 7.7 hours before the alert went out and 162 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: 970 J/kg
Mixed-layer CIN: -187 J/kg
Mixed-layer LCL: 1767 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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
May 19, 7:55 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Brown, Chautauqua, Clay and 35 more	65 min
May 19, 9:34 PM CDT	Mesoscale Discussion	SPC	Chautauqua, Labette, Montgomery, Neosho, Wilson	26 min
May 19, 10:16 PM CDT	Mesoscale Discussion	SPC	Bourbon, Cherokee, Crawford	59 min
May 19, 11:49 PM CDT	Mesoscale Discussion	SPC	Cherokee	56 min
May 20, 8:46 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Coffey, Linn, Miami and 3 more	59 min
May 20, 12:26 PM CDT	Mesoscale Discussion	SPC	Allen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 6 more	2 hr
May 20, 12:46 PM CDT	Tornado Watch	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 13 more	8 hr
May 20, 2:31 PM CDT	Mesoscale Discussion	SPC	Allen, Chautauqua, Cherokee, Crawford, Elk, Labette and 4 more	119 min
May 19, 8:53 PM CDT	Mesoscale Discussion	SPC	Adair, Atoka, Bryan, Canadian, Carter, Cherokee and 48 more	67 min
May 19, 10:44 PM CDT	Tornado Watch	SPC	Adair, Cherokee, Craig, Creek, Delaware, Haskell and 19 more	5 hr
May 20, 1:10 PM CDT	Tornado Watch	SPC	Adair, Atoka, Bryan, Caddo, Canadian, Carter and 49 more	9 hr
May 20, 5:34 PM CDT	Mesoscale Discussion	SPC	Love	56 min
May 20, 6:33 PM CDT	Mesoscale Discussion	SPC	Bryan, Johnston, Love, Marshall	57 min

Nearby

Mesoscale Discussions in Oklahoma, 2013 Mesoscale Discussions in Kansas, 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.