Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 200

April 3, 20155 states

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2015, 11:56 AM CDT for 5 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2015, 11:56 AM CDT (16:56 UTC)
Expired
Apr 3, 2015, 1:30 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 100 counties

Gallatin County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Floyd County, IN, Harrison County, IN, Perry County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Adair County, KY, Allen County, KY, Ballard County, KY, Barren County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Casey County, KY, Christian County, KY, Crittenden County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Fulton County, KY, Graves County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Jefferson County, KY, Larue County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marion County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Meade County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Russell County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Warren County, KY, Washington County, KY, Webster County, KY, Mississippi County, MO, Pemiscot County, MO, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Clay County, TN, Crockett County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Gibson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lake County, TN, Macon County, TN, Montgomery County, TN, Obion County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Weakley County, TN, Williamson County, TN, Wilson County, TN

The radar

The Ft Campbell radar (KHPX), 50 km from the middle of the area, began a volume at 16:56 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

Nashville Metro, TN (KBNA), launched 12:00Z, 4.9 hours before the alert went out and 140 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, Nashville Metro, TN at 12:00Z on 2015-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 135 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, Nashville Metro, TN at 12:00Z on 2015-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 274 square meters per square second.19395878Sfc1 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
135 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
990 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
274 m²/s²
0-3 km storm-relative helicity
325 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.6

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
Apr 2, 7:32 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 17 more58 min
Apr 2, 10:41 PM CDTSevere Thunderstorm WatchSPCAlexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 19 more6 hr
Apr 3, 3:39 AM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 3 more66 min
Apr 3, 12:14 PM CDTTornado WatchSPCGallatin, Hardin, Johnson, Massac, Pope, Pulaski and 1 more8 hr
Apr 3, 2:23 PM CDTMesoscale DiscussionSPCClark, Floyd, Harrison, Jefferson, Ohio, Perry and 2 more97 min
Apr 3, 3:10 PM CDTTornado WatchSPCAdair, Anderson, Bath, Bell, Bourbon, Boyle and 53 more6 hr
Apr 3, 5:10 PM CDTMesoscale DiscussionSPCBoyd, Greenup95 min
Apr 2, 7:02 PM CDTTornado WatchSPCBarry, Barton, Cedar, Christian, Dade, Dallas and 21 more8 hr
Apr 2, 10:12 PM CDTMesoscale DiscussionSPCBarry, Christian, Douglas, Lawrence, McDonald, Newton and 3 more93 min
Apr 3, 1:16 AM CDTMesoscale DiscussionSPCBarry, Barton, Butler, Carter, Cedar, Christian and 23 more59 min
Apr 3, 1:35 AM CDTTornado WatchSPCButler, Carter, Dunklin, Mississippi, New Madrid, Pemiscot and 2 more6 hr
Apr 3, 1:52 AM CDTSevere Thunderstorm WatchSPCBarry, Barton, Camden, Cedar, Christian, Dade and 24 more4 hr
Apr 3, 4:37 AM CDTMesoscale DiscussionSPCChristian, Dent, Douglas, Howell, Laclede, Oregon and 8 more83 min
Apr 3, 5:43 AM CDTMesoscale DiscussionSPCDunklin, Pemiscot2 hr
Apr 3, 3:57 PM CDTMesoscale DiscussionSPCChester, Fayette, Giles, Hardeman, Hardin, Lawrence and 4 more93 min
Apr 3, 5:54 PM CDTMesoscale DiscussionSPCCannon, Cumberland, DeKalb, Fentress, Jackson, Morgan and 9 more66 min
Apr 3, 6:48 PM CDTSevere Thunderstorm WatchSPCFranklin, Lincoln, Moore4 hr

Nearby

Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Tennessee, 2015Mesoscale Discussions in Illinois, 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.