Alert archive / Illinois / Mesoscale Discussions in 2008

Mesoscale Discussion 162

February 5, 200823 counties in Illinois; 4 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Feb 5, 2008, 4:46 PM CST for 23 counties in Illinois; 4 counties in Missouri. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Feb 5, 2008, 4:46 PM CST (22:46 UTC)
Expired
Feb 5, 2008, 6:45 PM CST
In force
119 min
Issued by
the Storm Prediction Center
All 27 counties

Bond County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Saint Clair County, IL, Shelby County, IL, City of Saint Louis, MO, Jefferson County, MO, Saint Louis County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 132 km from the middle of the area, began a volume at 22:49 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

Lincoln, IL (KILX), launched 12:00Z, 10.8 hours before the alert went out and 156 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 12:00Z on 2008-02-05Temperature 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 12:00Z on 2008-02-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.1939587897Sfc1 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
860 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
54 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
Feb 4, 6:20 PM CSTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Clinton and 13 more85 min
Feb 4, 7:14 PM CSTSevere Thunderstorm WatchSPCBond, Calhoun, Cass, Champaign, Christian, Clark and 33 more6 hr
Feb 4, 9:21 PM CSTMesoscale DiscussionSPCAlexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 18 more84 min
Feb 4, 9:44 PM CSTMesoscale DiscussionSPCCalhoun, Champaign, Christian, DeWitt, Douglas, Ford and 13 more91 min
Feb 5, 6:45 AM CSTMesoscale DiscussionSPCMassac2 hr
Feb 5, 9:47 AM CSTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more88 min
Feb 5, 3:09 PM CSTTornado Watch PDSSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more9 hr
Feb 5, 6:39 AM CSTMesoscale DiscussionSPCDouglas, Howell, Oregon, Ozark, Stone, Taney3 hr
Feb 5, 7:07 AM CSTMesoscale DiscussionSPCAndrew, Buchanan, Caldwell, Clay, Clinton, Daviess and 6 more6 hr
Feb 5, 10:18 AM CSTMesoscale DiscussionSPCBarry, Christian, McDonald, Newton, Stone87 min
Feb 5, 11:16 AM CSTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, Howell and 10 more89 min
Feb 5, 12:39 PM CSTTornado WatchSPCBarry, Christian, Dent, Douglas, Howell, Oregon and 7 more7 hr
Feb 5, 3:17 PM CSTMesoscale DiscussionSPCDouglas, Howell, Ozark, Taney, Texas88 min
Feb 5, 5:26 PM CSTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 8 more5 hr
Feb 5, 5:39 PM CSTMesoscale DiscussionSPCBollinger, Butler, Carter, Dunklin, New Madrid, Oregon and 5 more96 min

Nearby

Mesoscale Discussions in Illinois, 2008Mesoscale Discussions in Missouri, 2008Every mesoscale discussion in 2008

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.