Alert archive / Missouri / Mesoscale Discussions in 2006

Mesoscale Discussion 8

January 2, 200620 counties in Illinois; 44 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jan 2, 2006, 1:25 AM CST for 20 counties in Illinois; 44 counties in Missouri. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Jan 2, 2006, 1:25 AM CST (07:25 UTC)
Expired
Jan 2, 2006, 3:00 AM CST
In force
95 min
Issued by
the Storm Prediction Center
All 64 counties

Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Clinton County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Perry County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Schuyler County, IL, Scott County, IL, Washington County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, Chariton County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Howard County, MO, Iron County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Linn County, MO, Macon County, MO, Madison 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, Perry County, MO, Phelps County, MO, Pike County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Saline County, MO, Shelby County, MO, Texas County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 56 km from the middle of the area, began a volume at 07:27 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.4 hours before the alert went out and 280 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2006-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2006-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 233 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
632 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
233 m²/s²
0-3 km storm-relative helicity
193 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.

IssuedProductOfficeCountiesLasted
Jan 1, 10:55 PM CSTTornado WatchSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more7 hr
Jan 2, 2:15 AM CSTTornado WatchSPCBond, Calhoun, Christian, Clay, Clinton, Edwards and 25 more7 hr
Jan 2, 3:01 AM CSTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more59 min
Jan 2, 4:31 AM CSTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 47 more59 min
Jan 2, 5:38 AM CSTTornado WatchSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more6 hr
Jan 2, 7:14 AM CSTMesoscale DiscussionSPCBond, Cass, Champaign, Christian, Clark, Clay and 30 more31 min
Jan 2, 7:35 AM CSTTornado WatchSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 12 more4 hr
Jan 2, 7:57 AM CSTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more93 min
Jan 2, 10:21 AM CSTMesoscale DiscussionSPCClark, Crawford, Edgar, Jasper, Lawrence, Richland and 1 more84 min
Jan 1, 7:55 PM CSTMesoscale DiscussionSPCButler, Camden, Carter, Christian, Crawford, Dallas and 23 more2 hr

Nearby

Mesoscale Discussions in Missouri, 2006Mesoscale Discussions in Illinois, 2006Every mesoscale discussion in 2006

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.