Alert archive / Missouri / Mesoscale Discussions in 2013

Mesoscale Discussion 901

May 31, 20135 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 31, 2013, 7:03 AM CDT for 5 counties in Missouri. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: May 31, 2013, 7:03 AM CDT (12:03 UTC)
Expired: May 31, 2013, 8:00 AM CDT
In force: 57 min
Issued by: the Storm Prediction Center

Counties Cass County, MO, Cooper County, MO, Howard County, MO, Johnson County, MO, Pettis County, MO

The radar

The Pleasant Hill radar (KEAX), 91 km from the middle of the area, began a volume at 12:04 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

Topeka, KS (KTOP), launched 12:00Z, 0.1 hours before the alert went out and 210 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: 1021 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 580 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 316 m²/s²
0-3 km storm-relative helicity: 296 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

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 30, 7:04 PM CDT	Mesoscale Discussion	SPC	Perry, City of Saint Louis	56 min
May 30, 7:41 PM CDT	Mesoscale Discussion	SPC	Atchison	2 hr
May 30, 8:46 PM CDT	Tornado Watch	SPC	Dunklin, Pemiscot	7 hr
May 31, 1:57 AM CDT	Mesoscale Discussion	SPC	Butler, Carter, Oregon, Ripley	93 min
May 31, 2:05 AM CDT	Mesoscale Discussion	SPC	Buchanan, Clay, Clinton, Jackson, Platte, Ray	85 min
May 31, 2:44 AM CDT	Severe Thunderstorm Watch	SPC	Buchanan, Caldwell, Carroll, Cass, Chariton, Clay and 14 more	5 hr
May 31, 4:51 AM CDT	Mesoscale Discussion	SPC	Caldwell, Carroll, Cass, Chariton, Clay, Clinton and 11 more	114 min
May 31, 8:45 AM CDT	Mesoscale Discussion	SPC	Callaway, Camden, Cole, Crawford, Dent, Franklin and 18 more	90 min
May 31, 1:49 PM CDT	Mesoscale Discussion	SPC	Barry, Barton, Bates, Benton, Camden, Cass and 29 more	116 min
May 31, 2:15 PM CDT	Tornado Watch	SPC	Barry, Barton, Bates, Benton, Boone, Callaway and 30 more	8 hr
May 31, 5:21 PM CDT	Mesoscale Discussion	SPC	Franklin, Lincoln, Montgomery, Pike, Saint Charles, Saint Louis and 1 more	54 min
May 31, 5:45 PM CDT	Tornado Watch	SPC	Audrain, Crawford, Franklin, Gasconade, Jefferson, Lincoln and 9 more	4 hr

Nearby

Mesoscale Discussions in Missouri, 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.