Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 116

February 20, 201435 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Feb 20, 2014, 2:43 AM CST for 35 counties in Missouri. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Feb 20, 2014, 2:43 AM CST (08:43 UTC)
Expired: Feb 20, 2014, 5:15 AM CST
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 35 counties

Benton County, MO, Camden County, MO, Cedar County, MO, Cole County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Hickory County, MO, Iron County, MO, Jefferson County, MO, Laclede County, MO, Maries County, MO, Miller County, MO, Morgan County, MO, Osage County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shannon County, MO, St. Clair County, MO, Texas County, MO, Vernon County, MO, Warren County, MO, Washington County, MO, Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 95 km from the middle of the area, began a volume at 08:46 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

Topeka, KS (KFOE), launched 00:00Z, 8.7 hours before the alert went out and 295 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: 1831 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 316 m²/s²
0-3 km storm-relative helicity: 540 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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
Feb 20, 4:24 AM CST	Mesoscale Discussion	SPC	Andrew, Buchanan, Caldwell, Clay, Clinton, Daviess and 11 more	2 hr
Feb 20, 10:20 AM CST	Mesoscale Discussion	SPC	Adair, Clark, Daviess, Gentry, Grundy, Harrison and 7 more	85 min
Feb 20, 11:34 AM CST	Mesoscale Discussion	SPC	Audrain, Boone, Callaway, Camden, Chariton, Cole and 25 more	116 min
Feb 20, 1:36 PM CST	Severe Thunderstorm Watch	SPC	Crawford, Franklin, Gasconade, Iron, Jefferson, Lincoln and 12 more	4 hr
Feb 20, 1:45 PM CST	Mesoscale Discussion	SPC	Dunklin, Mississippi, New Madrid, Pemiscot, Scott, Stoddard	2 hr
Feb 20, 2:23 PM CST	Tornado Watch	SPC	Bollinger, Butler, Cape Girardeau, Carter, Dunklin, Mississippi and 7 more	7 hr
Feb 20, 3:23 PM CST	Mesoscale Discussion	SPC	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	97 min
Feb 20, 5:29 PM CST	Mesoscale Discussion	SPC	Bollinger, Cape Girardeau, Dunklin, Mississippi, New Madrid, Pemiscot and 3 more	46 min

Nearby

Mesoscale Discussions in Missouri, 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.