Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 551

May 10, 20144 counties in Illinois; 40 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 10, 2014, 4:56 PM CDT for 4 counties in Illinois; 40 counties in Missouri. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: May 10, 2014, 4:56 PM CDT (21:56 UTC)
Expired: May 10, 2014, 6:00 PM CDT
In force: 64 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 44 counties

Calhoun County, IL, Jersey County, IL, Monroe County, IL, Saint Clair County, IL, Adair County, MO, Audrain County, MO, Boone County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Howard County, MO, Jefferson County, MO, Johnson County, MO, Lafayette County, MO, Lincoln County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Maries County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Saline County, MO, Shelby County, MO, Sullivan County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 130 km from the middle of the area, began a volume at 22:00 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 138May 10, 5:20 PM CDT

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 9.9 hours before the alert went out and 302 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: 1969 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 184 m²/s²
0-3 km storm-relative helicity: 179 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
May 10, 12:44 PM CDT	Mesoscale Discussion	SPC	Gallatin, Hardin, Wabash	2 hr
May 10, 5:16 PM CDT	Severe Thunderstorm Watch	SPC	Calhoun, Jersey, Madison, Monroe, Saint Clair	9 hr
May 10, 12:54 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Bates, Benton, Buchanan, Caldwell and 18 more	2 hr
May 10, 2:26 PM CDT	Severe Thunderstorm Watch	SPC	Andrew, Atchison, Bates, Buchanan, Caldwell, Carroll and 20 more	8 hr
May 10, 3:42 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Bates, Benton, Buchanan, Caldwell and 28 more	93 min
May 10, 5:35 PM CDT	Mesoscale Discussion	SPC	Carroll, Chariton, Howard, Lafayette, Ray, Saline	55 min

Nearby

Mesoscale Discussions in Missouri, 2014 Mesoscale Discussions in Illinois, 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.