Alert archive / Missouri / Mesoscale Discussions in 2015

Mesoscale Discussion 2030

December 23, 20155 states

The Storm Prediction Center issued this mesoscale discussion at Dec 23, 2015, 6:13 AM CST for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Dec 23, 2015, 6:13 AM CST (12:13 UTC)
Expired
Dec 23, 2015, 8:15 AM CST
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 67 counties

Clay County, AR, Greene County, AR, Randolph County, AR, Alexander County, IL, Bond County, IL, Clinton County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Madison County, IL, Marion County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Washington County, IL, Williamson County, IL, Ballard County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, McCracken County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Dunklin County, MO, Franklin County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Perry County, MO, Phelps County, MO, Reynolds County, MO, Ripley County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Lake County, TN, Obion County, TN

The radar

The Paducah radar (KPAH), 147 km from the middle of the area, began a volume at 12:15 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

Little Rock, AR (KBYH), launched 12:00Z, 0.2 hours before the alert went out and 272 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, Little Rock, AR at 12:00Z on 2015-12-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 343 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, Little Rock, AR at 12:00Z on 2015-12-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 331 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
343 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
331 m²/s²
0-3 km storm-relative helicity
353 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

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
Dec 22, 10:17 PM CSTMesoscale DiscussionSPCClark, Columbia, Dallas, Garland, Hempstead, Hot Spring and 9 more2 hr
Dec 23, 12:06 AM CSTTornado WatchSPCBradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 10 more7 hr
Dec 23, 4:39 AM CSTMesoscale DiscussionSPCBradley, Calhoun, Clark, Cleburne, Cleveland, Columbia and 37 more2 hr
Dec 23, 6:20 AM CSTTornado WatchSPCArkansas, Baxter, Boone, Bradley, Calhoun, Clark and 50 more7 hr
Dec 23, 9:05 AM CSTMesoscale DiscussionSPCArkansas, Clark, Clay, Cleburne, Cleveland, Craighead and 28 more85 min
Dec 23, 9:13 AM CSTTornado WatchSPCClay, Craighead, Greene, Lawrence, Mississippi, Poinsett and 1 more8 hr
Dec 23, 10:12 AM CSTMesoscale DiscussionSPCBradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 10 more93 min
Dec 23, 10:29 AM CSTMesoscale DiscussionSPCClay91 min
Dec 23, 10:58 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Chicot, Cleveland, Crittenden and 11 more2 hr
Dec 23, 11:57 AM CSTTornado Watch PDSSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 12 more9 hr
Dec 23, 12:48 PM CSTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 16 more57 min
Dec 23, 2:49 PM CSTMesoscale DiscussionSPCChicot, Crittenden, Cross, Desha, Lee, Mississippi and 2 more86 min
Dec 23, 9:41 AM CSTMesoscale DiscussionSPCCook, DuPage, Ford, Grundy, Iroquois, Kane and 5 more2 hr
Dec 23, 12:06 PM CSTMesoscale DiscussionSPCClay, Crawford, Edwards, Gallatin, Hamilton, Hardin and 7 more84 min
Dec 23, 12:42 PM CSTMesoscale DiscussionSPCAdams, Brown, Bureau, Calhoun, Cass, Fulton and 25 more2 hr
Dec 23, 1:55 PM CSTTornado WatchSPCAdams, Brown, Bureau, Calhoun, Cass, Fulton and 24 more4 hr
Dec 23, 3:24 PM CSTMesoscale DiscussionSPCAdams, Brown, Bureau, Calhoun, Cass, Fulton and 26 more96 min
Dec 23, 12:28 PM CSTTornado WatchSPCBreckinridge, Bullitt, Butler, Carroll, Christian, Daviess and 24 more8 hr
Dec 23, 2:16 PM CSTMesoscale DiscussionSPCBoone, Campbell, Carroll, Gallatin, Grant, Henry and 5 more59 min
Dec 23, 3:17 PM CSTSevere Thunderstorm WatchSPCBoone, Bracken, Campbell, Gallatin, Grant, Kenton and 5 more7 hr
Dec 23, 4:59 PM CSTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bourbon, Boyle and 51 more2 hr
Dec 23, 4:26 PM CSTMesoscale DiscussionSPCBedford, Bledsoe, Cannon, Cheatham, Clay, Coffee and 38 more64 min
Dec 23, 4:49 PM CSTTornado WatchSPCBedford, Cannon, Cheatham, Coffee, Davidson, Dickson and 23 more6 hr

Nearby

Mesoscale Discussions in Missouri, 2015Mesoscale Discussions in Illinois, 2015Mesoscale Discussions in Kentucky, 2015Every mesoscale discussion in 2015

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.