Alert archive / Kentucky / Mesoscale Discussions in 2014

Mesoscale Discussion 1247

July 1, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2014, 6:13 PM CDT for 4 states. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Jul 1, 2014, 6:13 PM CDT (23:13 UTC)
Expired
Jul 1, 2014, 7:45 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 24 counties

Clay County, AR, Massac County, IL, 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, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Webster County, KY, Mississippi County, MO, New Madrid County, MO

The radar

The Paducah radar (KPAH), 23 km from the middle of the area, began a volume at 23:17 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

Little Rock, AR (KBYH), launched 12:00Z, 11.2 hours before the alert went out and 248 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 2014-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 403 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 2014-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -70 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
403 J/kg
Mixed-layer CIN
-418 J/kg
Mixed-layer LCL
1533 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-70 m²/s²
0-3 km storm-relative helicity
9 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 1, 1:31 PM CDTMesoscale DiscussionSPCBaxter, Boone, Clay, Craighead, Fulton, Greene and 9 more59 min
Jul 1, 2:07 PM CDTSevere Thunderstorm WatchSPCBaxter, Clay, Fulton, Greene, Izard, Lawrence and 3 more7 hr
Jul 1, 4:29 PM CDTMesoscale DiscussionSPCCrawford, Franklin, Johnson, Logan, Madison, Newton and 4 more3 hr
Jun 30, 7:26 PM CDTMesoscale DiscussionSPCBureau, Fulton, Hancock, Henderson, Henry, Knox and 13 more2 hr
Jun 30, 7:47 PM CDTMesoscale DiscussionSPCKankakee88 min
Jun 30, 7:48 PM CDTMesoscale DiscussionSPCHancock57 min
Jun 30, 8:44 PM CDTMesoscale DiscussionSPCBureau, Cook, DeKalb, DuPage, Grundy, Iroquois and 12 more31 min
Jun 30, 9:01 PM CDTSevere Thunderstorm WatchSPCCass, Champaign, Cook, DeWitt, Douglas, DuPage and 31 more6 hr
Jun 30, 9:47 PM CDTMesoscale DiscussionSPCDuPage, Ford, Grundy, Iroquois, Kankakee, Kendall and 9 more88 min
Jun 30, 10:11 PM CDTMesoscale DiscussionSPCChampaign, Douglas, Edgar, Moultrie, Piatt, Vermilion2 hr
Jun 30, 10:14 PM CDTMesoscale DiscussionSPCAdams61 min
Jun 30, 10:22 PM CDTMesoscale DiscussionSPCKankakee, Will53 min
Jun 30, 11:31 PM CDTMesoscale DiscussionSPCChampaign, DeWitt, Logan, Macon, Menard, Piatt and 2 more89 min
Jul 1, 1:56 AM CDTMesoscale DiscussionSPCBoone, Bracken, Campbell, Carroll, Fleming, Gallatin and 7 more64 min
Jul 1, 4:43 PM CDTMesoscale DiscussionSPCBoone, Bracken, Breckinridge, Bullitt, Campbell, Carroll and 18 more92 min

Nearby

Mesoscale Discussions in Kentucky, 2014Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Arkansas, 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.