Alert archive / Missouri / Mesoscale Discussions in 2006

Mesoscale Discussion 371

March 30, 200619 counties in Illinois; 34 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2006, 7:57 PM CST for 19 counties in Illinois; 34 counties in Missouri. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued
Mar 30, 2006, 7:57 PM CST (01:57 UTC)
Expired
Mar 30, 2006, 9:00 PM CST
In force
63 min
Issued by
the Storm Prediction Center
All 53 counties

Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, McDonough County, IL, Monroe County, IL, Morgan County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Adair County, MO, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Clark County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Macon County, MO, Maries County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Phelps County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 66 km from the middle of the area, began a volume at 01:59 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, 2.0 hours before the alert went out and 229 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 2006-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 joules per kilogram.LCLLFCEL10008507005003002001001 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 2006-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 162 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
46 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1236 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
162 m²/s²
0-3 km storm-relative helicity
250 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
Mar 30, 8:17 PM CSTSevere Thunderstorm WatchSPCAdams, Bond, Brown, Calhoun, Cass, Clinton and 22 more6 hr
Mar 30, 11:08 PM CSTMesoscale DiscussionSPCHenderson, Mercer, Rock Island, Warren67 min
Mar 30, 11:23 PM CSTSevere Thunderstorm WatchSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 18 more4 hr
Mar 31, 12:58 AM CSTMesoscale DiscussionSPCBond, Champaign, Christian, Clark, Clay, Clinton and 46 more92 min
Mar 31, 12:57 PM CSTMesoscale DiscussionSPCClark, Crawford, Edwards, Franklin, Hamilton, Jasper and 5 more2 hr
Mar 31, 2:43 PM CSTTornado WatchSPCAlexander, Clark, Clay, Clinton, Coles, Crawford and 30 more6 hr
Mar 31, 4:03 PM CSTMesoscale DiscussionSPCCrawford, Lawrence57 min
Mar 30, 8:29 PM CSTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Caldwell, Camden and 41 more91 min
Mar 30, 9:42 PM CSTTornado WatchSPCBarry, Benton, Camden, Cedar, Christian, Dade and 25 more5 hr
Mar 31, 1:13 AM CSTMesoscale DiscussionSPCButler, Carter, Douglas, Howell, Oregon, Ozark and 7 more62 min
Mar 31, 1:58 PM CSTMesoscale DiscussionSPCDunklin, New Madrid, Pemiscot92 min

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.