Alert archive / Kentucky / Mesoscale Discussions in 2012

Mesoscale Discussion 1058

June 4, 20125 states

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2012, 6:27 PM CDT for 5 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Jun 4, 2012, 6:27 PM CDT (23:27 UTC)
Expired
Jun 4, 2012, 8:00 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 75 counties

Alexander County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson 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, White County, IL, Williamson County, IL, Posey County, IN, Vanderburgh County, IN, Ballard County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Fulton County, KY, Graves 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, Simpson County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Warren County, KY, Webster County, KY, Bollinger County, MO, Cape Girardeau County, MO, Jefferson County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Perry County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Benton County, TN, Cheatham County, TN, Davidson County, TN, Dickson County, TN, Henry County, TN, Houston County, TN, Humphreys County, TN, Lake County, TN, Montgomery County, TN, Obion County, TN, Robertson County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Weakley County, TN, Wilson County, TN

The radar

The Paducah radar (KPAH), 23 km from the middle of the area, began a volume at 23:30 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

Lincoln, IL (KILX), launched 12:00Z, 11.5 hours before the alert went out and 325 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 12:00Z on 2012-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2012-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 156 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1375 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
156 m²/s²
0-3 km storm-relative helicity
231 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 4, 2:38 PM CDTMesoscale DiscussionSPCAlexander, Bond, Calhoun, Clinton, Franklin, Gallatin and 24 more2 hr
Jun 4, 3:25 PM CDTSevere Thunderstorm WatchSPCAlexander, Bond, Calhoun, Clinton, Fayette, Franklin and 26 more7 hr
Jun 3, 7:09 PM CDTTornado WatchSPCDunklin, Pemiscot7 hr
Jun 3, 7:47 PM CDTMesoscale DiscussionSPCBarry, Barton, Cedar, Dade, Greene, Jasper and 6 more58 min
Jun 3, 8:34 PM CDTMesoscale DiscussionSPCDunklin, Pemiscot56 min
Jun 4, 1:51 AM CDTMesoscale DiscussionSPCMcDonald54 min
Jun 3, 11:13 PM CDTMesoscale DiscussionSPCHardin, McNairy62 min
Jun 4, 3:14 AM CDTMesoscale DiscussionSPCFayette, Hardeman, McNairy, Shelby91 min

Nearby

Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Illinois, 2012Mesoscale Discussions in Tennessee, 2012Every mesoscale discussion in 2012

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.