Alert archive / Missouri / Mesoscale Discussions in 2005

Mesoscale Discussion 2194

September 13, 2005Monroe County, Saint Clair County, Illinois; 15 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Sep 13, 2005, 10:44 PM CDT for Monroe County, Saint Clair County, Illinois; 15 counties in Missouri. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Sep 13, 2005, 10:44 PM CDT (03:44 UTC)
Expired: Sep 14, 2005, 12:15 AM CDT
In force: 91 min
Issued by: the Storm Prediction Center

Counties Monroe County, IL, Saint Clair County, IL, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Texas County, MO, Washington County, MO, Wright County, MO

The radar

The St Louis radar (KLSX), 114 km from the middle of the area, began a volume at 03:44 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

Springfield, MO (KSGF), launched 00:00Z, 3.7 hours before the alert went out and 239 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: 1509 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 2064 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

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
Sep 13, 7:29 PM CDT	Mesoscale Discussion	SPC	Audrain, Barry, Barton, Bates, Benton, Boone and 36 more	2 hr
Sep 13, 9:10 PM CDT	Severe Thunderstorm Watch	SPC	Barry, Barton, Camden, Cedar, Christian, Dade and 22 more	7 hr
Sep 14, 2:15 AM CDT	Mesoscale Discussion	SPC	Barry, Christian, Douglas, Howell, McDonald, Ozark and 5 more	60 min

Nearby

Mesoscale Discussions in Missouri, 2005 Mesoscale Discussions in Illinois, 2005 Every mesoscale discussion in 2005

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.