Alert archive / Missouri / Mesoscale Discussions in 2010

Mesoscale Discussion 1024

June 19, 2010Calhoun County, Jersey County, Illinois; 21 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2010, 1:07 PM CDT for Calhoun County, Jersey County, Illinois; 21 counties in Missouri. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jun 19, 2010, 1:07 PM CDT (18:07 UTC)
Expired: Jun 19, 2010, 2:00 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

All 23 counties

Calhoun County, IL, Jersey County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 80 km from the middle of the area, began a volume at 18:07 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 352Jun 19, 1:45 PM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 6.1 hours before the alert went out and 314 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: 623 J/kg
Mixed-layer CIN: -172 J/kg
Mixed-layer LCL: 773 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.5

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
Jun 18, 7:38 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Brown, Bureau, Carroll, Cass and 34 more	97 min
Jun 18, 8:05 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Bureau, Cass, Christian, Cook and 36 more	4 hr
Jun 18, 10:46 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Cass, Champaign, Christian, Clark and 26 more	89 min
Jun 18, 11:38 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Champaign and 29 more	5 hr
Jun 19, 2:33 AM CDT	Mesoscale Discussion	SPC	Clay, Clinton, Edwards, Franklin, Gallatin, Hamilton and 19 more	57 min
Jun 19, 1:48 PM CDT	Severe Thunderstorm Watch	SPC	Bond, Calhoun, Clinton, Fayette, Greene, Jersey and 9 more	5 hr
Jun 19, 5:55 PM CDT	Mesoscale Discussion	SPC	Alexander, Bond, Christian, Clay, Clinton, Cumberland and 28 more	95 min
Jun 19, 6:50 AM CDT	Mesoscale Discussion	SPC	Andrew, Buchanan, Caldwell, Clay, Clinton, DeKalb and 3 more	55 min
Jun 19, 8:02 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Andrew, Atchison, Bates, Buchanan, Caldwell and 24 more	7 hr
Jun 19, 11:29 AM CDT	Mesoscale Discussion	SPC	Buchanan, Caldwell, Carroll, Cass, Clay, Clinton and 6 more	91 min
Jun 19, 6:55 PM CDT	Mesoscale Discussion	SPC	Atchison, Holt, Nodaway	95 min

Nearby

Mesoscale Discussions in Missouri, 2010 Mesoscale Discussions in Illinois, 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.