Alert archive / Kentucky / Mesoscale Discussions in 2014

Mesoscale Discussion 1439

July 23, 20146 states

The Storm Prediction Center issued this mesoscale discussion at Jul 23, 2014, 6:29 AM CDT for 6 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 23, 2014, 6:29 AM CDT (11:29 UTC)
Expired
Jul 23, 2014, 8:30 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 75 counties

Clay County, AR, Craighead County, AR, Greene County, AR, Lawrence County, AR, Randolph County, AR, Alexander County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Johnson County, IL, Lawrence County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Wabash County, IL, White County, IL, Williamson County, IL, Crawford County, IN, Daviess County, IN, Dubois County, IN, Gibson County, IN, Greene County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Fulton County, KY, Graves County, KY, Hancock County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Butler County, MO, Cape Girardeau County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Dyer County, TN, Henry County, TN, Lake County, TN, Obion County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 62 km from the middle of the area, began a volume at 11:29 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, 11.5 hours before the alert went out and 286 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 2014-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1652 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 2014-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 107 square meters per square second.1939Sfc1 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
1652 J/kg
Mixed-layer CIN
-255 J/kg
Mixed-layer LCL
1237 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
107 m²/s²
0-3 km storm-relative helicity
221 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
Jul 23, 11:56 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more94 min
Jul 23, 12:59 PM CDTSevere Thunderstorm WatchSPCArkansas, Baxter, Benton, Boone, Bradley, Calhoun and 49 more7 hr
Jul 23, 1:27 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 3 more63 min
Jul 23, 1:37 PM CDTSevere Thunderstorm WatchSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more4 hr
Jul 23, 3:01 PM CDTMesoscale DiscussionSPCBaxter, Clark, Cleburne, Conway, Craighead, Crawford and 46 more89 min
Jul 23, 4:04 PM CDTSevere Thunderstorm WatchSPCColumbia, Hempstead, Lafayette, Miller, Nevada5 hr
Jul 23, 6:06 PM CDTMesoscale DiscussionSPCBradley, Calhoun, Cleveland, Columbia, Drew, Lafayette and 4 more84 min
Jul 23, 6:29 PM CDTSevere Thunderstorm WatchSPCUnion5 hr
Jul 22, 7:41 PM CDTMesoscale DiscussionSPCHancock, Henderson, McDonough, Warren94 min

Nearby

Mesoscale Discussions in Kentucky, 2014Mesoscale Discussions in Illinois, 2014Mesoscale Discussions in Indiana, 2014Every mesoscale discussion in 2014

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.