Alert archive / Missouri / Mesoscale Discussions in 2006

Mesoscale Discussion 522

April 15, 2006Adams County, Pike County, Illinois; 34 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2006, 11:39 PM CDT for Adams County, Pike County, Illinois; 34 counties in Missouri. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Apr 15, 2006, 11:39 PM CDT (04:39 UTC)
Expired
Apr 16, 2006, 12:45 AM CDT
In force
66 min
Issued by
the Storm Prediction Center
All 36 counties

Adams County, IL, Pike County, IL, Audrain County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cedar County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Hickory County, MO, Howard County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Macon 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, Pettis County, MO, Phelps County, MO, Pike County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Shelby County, MO, St. Clair County, MO, Warren County, MO

The radar

The Pleasant Hill radar (KEAX), 118 km from the middle of the area, began a volume at 04:42 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

Topeka, KS (KTOP), launched 00:00Z, 4.7 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-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 2006-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1495 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, Topeka, KS at 00:00Z on 2006-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 439 square meters per square second.1939587897117Sfc1 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
1495 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
1459 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
439 m²/s²
0-3 km storm-relative helicity
519 m²/s²
Significant tornado parameter
2.1
Supercell composite
8.5

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.

IssuedProductOfficeCountiesLasted
Apr 15, 10:46 PM CDTMesoscale DiscussionSPCHancock, Henderson, Mercer, Rock Island, Warren119 min
Apr 16, 7:15 AM CDTMesoscale DiscussionSPCGallatin, Hardin, Johnson, Massac, Pope, Saline2 hr
Apr 16, 10:57 AM CDTMesoscale DiscussionSPCAdams, Boone, Brown, Bureau, Calhoun, Carroll and 33 more2 hr
Apr 16, 11:17 AM CDTTornado WatchSPCAdams, Bond, Brown, Bureau, Calhoun, Cass and 44 more8 hr
Apr 16, 12:20 PM CDTSevere Thunderstorm WatchSPCBoone, Carroll, Cook, DeKalb, DuPage, Ford and 15 more7 hr
Apr 16, 1:08 PM CDTMesoscale DiscussionSPCChampaign, Clark, Crawford, Douglas, Edgar, Ford and 3 more97 min
Apr 16, 1:18 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Bureau, Calhoun, Cass and 45 more57 min
Apr 16, 1:39 PM CDTTornado WatchSPCChampaign, Clark, Coles, Crawford, Cumberland, Douglas and 11 more7 hr
Apr 16, 3:24 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more2 hr
Apr 16, 3:43 PM CDTMesoscale DiscussionSPCBond, Bureau, Cass, Champaign, Christian, Clark and 49 more92 min
Apr 16, 3:50 PM CDTMesoscale DiscussionSPCBoone, Cook, DeKalb, DuPage, Kane, Kendall and 6 more85 min
Apr 16, 6:14 PM CDTMesoscale DiscussionSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 19 more2 hr
Apr 15, 9:14 PM CDTMesoscale DiscussionSPCAdair, Bates, Caldwell, Carroll, Cass, Chariton and 17 more91 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.