Alert archive / Missouri / Mesoscale Discussions in 2010

Mesoscale Discussion 539

May 13, 201017 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 13, 2010, 2:20 AM CDT for 17 counties in Missouri. It was in force for 25 min.

The area

The outline as issued.

The facts

Issued: May 13, 2010, 2:20 AM CDT (07:20 UTC)
Expired: May 13, 2010, 2:45 AM CDT
In force: 25 min
Issued by: the Storm Prediction Center

Counties Barton County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Dade County, MO, Dallas County, MO, Greene County, MO, Hickory County, MO, Jasper County, MO, Laclede County, MO, Miller County, MO, Morgan County, MO, Polk County, MO, Pulaski County, MO, St. Clair County, MO, Vernon County, MO, Webster County, MO

The radar

The Springfield radar (KSGF), 48 km from the middle of the area, began a volume at 07:24 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.

Severe Thunderstorm Watch 163May 13, 2:25 AM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 7.3 hours before the alert went out and 92 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: 1283 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1221 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 306 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 9.5

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 12, 7:20 PM CDT	Mesoscale Discussion	SPC	Atchison	55 min
May 12, 8:00 PM CDT	Mesoscale Discussion	SPC	Adair, Clark, Daviess, DeKalb, Gentry, Grundy and 17 more	90 min
May 12, 8:23 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Andrew, Atchison, Buchanan, Chariton, Clark and 22 more	4 hr
May 12, 10:53 PM CDT	Mesoscale Discussion	SPC	Carroll, Cass, Clay, Clinton, Cooper, Howard and 7 more	97 min
May 12, 11:24 PM CDT	Mesoscale Discussion	SPC	Adair, Andrew, Clark, Daviess, DeKalb, Gentry and 15 more	96 min
May 12, 11:58 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Audrain, Bates, Boone, Caldwell, Carroll and 31 more	5 hr
May 13, 2:24 AM CDT	Severe Thunderstorm Watch	SPC	Barton, Benton, Camden, Cedar, Dade, Dallas and 9 more	3 hr
May 13, 4:23 AM CDT	Mesoscale Discussion	SPC	Audrain, Barton, Bates, Benton, Boone, Camden and 31 more	67 min
May 13, 5:02 AM CDT	Mesoscale Discussion	SPC	Barry, Christian, Dade, Douglas, Greene, Jasper and 7 more	28 min
May 13, 5:04 AM CDT	Severe Thunderstorm Watch	SPC	Barry, Christian, Greene, Jasper, Lawrence, McDonald and 3 more	3 hr
May 13, 7:13 AM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Christian, Dent and 20 more	32 min
May 13, 7:38 AM CDT	Severe Thunderstorm Watch	SPC	Butler, Carter, Dent, Douglas, Howell, Iron and 12 more	2 hr
May 13, 1:28 PM CDT	Mesoscale Discussion	SPC	Howell, Ozark	62 min
May 13, 2:33 PM CDT	Severe Thunderstorm Watch	SPC	Douglas, Howell, Oregon, Ozark, Shannon, Taney and 1 more	5 hr
May 13, 5:41 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 24 more	94 min

Nearby

Mesoscale Discussions in Missouri, 2010 Every mesoscale discussion in 2010

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.