Alert archive / Missouri / Mesoscale Discussions in 2008

Mesoscale Discussion 1941

July 28, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Jul 28, 2008, 1:23 AM CDT for 4 states. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jul 28, 2008, 1:23 AM CDT (06:23 UTC)
Expired
Jul 28, 2008, 3:00 AM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 111 counties

Adair County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Guthrie County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Polk County, IA, Ringgold County, IA, Story County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Adams County, IL, Alexander County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Ballard County, KY, Carlisle County, KY, Crittenden County, KY, Livingston County, KY, Marshall County, KY, McCracken County, KY, Adair County, MO, Audrain County, MO, Bollinger County, MO, Boone County, MO, Callaway County, MO, Cape Girardeau County, MO, Carter County, MO, Chariton County, MO, City of Saint Louis, MO, Clark County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Grundy County, MO, Harrison 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, Mercer County, MO, Miller County, MO, Mississippi County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Perry County, MO, Phelps County, MO, Pike County, MO, Pulaski County, MO, Putnam 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, Schuyler County, MO, Scotland County, MO, Scott County, MO, Shannon County, MO, Shelby County, MO, Stoddard County, MO, Sullivan County, MO, Warren County, MO, Washington County, MO, Wayne County, MO

The radar

The St Louis radar (KLSX), 93 km from the middle of the area, began a volume at 06:24 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 00:00Z, 6.4 hours before the alert went out and 273 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 2008-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 569 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 2008-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 square meters per square second.193958Sfc1 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
569 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
1274 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
151 m²/s²
Significant tornado parameter
0.1
Supercell composite
3.8

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
Jul 27, 8:20 PM CDTMesoscale DiscussionSPCBond, Calhoun, Greene, Jersey, Macoupin, Madison and 4 more85 min
Jul 27, 9:39 PM CDTSevere Thunderstorm WatchSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more6 hr
Jul 27, 11:30 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Butler and 33 more9 hr
Jul 28, 5:31 AM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Carroll, Cass, Clarke and 13 more89 min
Jul 28, 7:26 AM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Carroll, Cass, Crawford and 8 more94 min
Jul 28, 1:44 PM CDTMesoscale DiscussionSPCAdair, Allen, Barren, Bath, Bell, Breathitt and 41 more2 hr

Nearby

Mesoscale Discussions in Missouri, 2008Mesoscale Discussions in Iowa, 2008Mesoscale Discussions in Illinois, 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.