Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 1406

June 26, 201115 counties in Illinois; 5 counties in Iowa; 17 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2011, 6:22 PM CDT for 15 counties in Illinois; 5 counties in Iowa; 17 counties in Missouri. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jun 26, 2011, 6:22 PM CDT (23:22 UTC)
Expired
Jun 26, 2011, 7:45 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 37 counties

Des Moines County, IA, Henry County, IA, Jefferson County, IA, Lee County, IA, Van Buren County, IA, Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Greene County, IL, Hancock County, IL, Henderson County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, McDonough County, IL, Morgan County, IL, Pike County, IL, Schuyler County, IL, Scott County, IL, Adair County, MO, Audrain County, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Scotland County, MO, Shelby County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 145 km from the middle of the area, began a volume at 23:21 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

Davenport, (KDVN), launched 12:00Z, 11.4 hours before the alert went out and 198 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, Davenport, at 12:00Z on 2011-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Davenport, at 12:00Z on 2011-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
922 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
64 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
Jun 25, 7:36 PM CDTSevere Thunderstorm WatchSPCAlexander, Bond, Calhoun, Clinton, Edwards, Fayette and 27 more6 hr
Jun 25, 9:30 PM CDTSevere Thunderstorm WatchSPCChristian, Clay, Crawford, Cumberland, Effingham, Jasper and 4 more5 hr
Jun 25, 10:22 PM CDTMesoscale DiscussionSPCGallatin, Hardin, Pope, Saline, Wabash, White and 1 more53 min
Jun 26, 1:21 AM CDTMesoscale DiscussionSPCAlexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 20 more84 min
Jun 26, 1:58 AM CDTSevere Thunderstorm WatchSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 12 more4 hr
Jun 26, 4:14 AM CDTMesoscale DiscussionSPCMassac91 min
Jun 26, 2:24 PM CDTSevere Thunderstorm WatchSPCMonroe, Randolph5 hr
Jun 26, 6:16 AM CDTMesoscale DiscussionSPCAudubon, Cass, Cherokee, Crawford, Fremont, Harrison and 10 more59 min
Jun 26, 3:09 PM CDTMesoscale DiscussionSPCFremont, Mills, Montgomery, Page, Pottawattamie2 hr
Jun 26, 4:56 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 40 more7 hr
Jun 25, 7:07 PM CDTMesoscale DiscussionSPCAudrain, Barton, Bates, Benton, Boone, Callaway and 46 more113 min
Jun 26, 10:13 AM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Camden, Cass and 24 more62 min
Jun 26, 12:05 PM CDTSevere Thunderstorm WatchSPCDunklin, Pemiscot8 hr
Jun 26, 2:11 PM CDTMesoscale DiscussionSPCButler, Carter, Dunklin, Howell, Oregon, Pemiscot and 6 more64 min
Jun 26, 6:55 PM CDTTornado WatchSPCAdair, Andrew, Atchison, Audrain, Boone, Buchanan and 46 more7 hr

Nearby

Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Illinois, 2011Mesoscale Discussions in Iowa, 2011Every mesoscale discussion in 2011

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.