Alert archive / Kentucky / Mesoscale Discussions in 2004

Mesoscale Discussion 934

May 27, 200415 counties in Illinois; 23 counties in Indiana; 37 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at May 27, 2004, 1:53 AM CDT for 15 counties in Illinois; 23 counties in Indiana; 37 counties in Kentucky. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
May 27, 2004, 1:53 AM CDT (06:53 UTC)
Expired
May 27, 2004, 4:30 AM CDT
In force
3 hr
Issued by
the Storm Prediction Center
All 75 counties

Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Effingham County, IL, Fayette County, IL, Greene County, IL, Jasper County, IL, Lawrence County, IL, Macoupin County, IL, Montgomery County, IL, Richland County, IL, Shelby County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Daviess County, IN, Floyd County, IN, Greene County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Ohio County, IN, Orange County, IN, Owen County, IN, Ripley County, IN, Scott County, IN, Sullivan County, IN, Switzerland County, IN, Vigo County, IN, Washington County, IN, Bath County, KY, Boone County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Carroll County, KY, Carter County, KY, Clark County, KY, Elliott County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Johnson County, KY, Kenton County, KY, Lawrence County, KY, Lewis County, KY, Magoffin County, KY, Mason County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Powell County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Shelby County, KY, Trimble County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 93 km from the middle of the area, began a volume at 06:56 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.9 hours before the alert went out and 242 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 2004-05-27Temperature 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 00:00Z on 2004-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -75 square meters per square second.1939587897117136156Sfc1 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
1412 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
-75 m²/s²
0-3 km storm-relative helicity
67 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.

703 
ACUS11 KWNS 270654
SWOMCD
SPC MCD 270653 
WVZ000-KYZ000-OHZ000-INZ000-ILZ000-270930-

MESOSCALE DISCUSSION 0934
NWS STORM PREDICTION CENTER NORMAN OK
0153 AM CDT THU MAY 27 2004

AREAS AFFECTED...PORTIONS SRN IL...SRN INDIANA AND NRN KY

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 270653Z - 270930Z

SEVERE POTENTIAL MAY BE INCREASING IN ASSOCIATION WITH ELEVATED TSTM
CLUSTERS MOVING ESEWD ACROSS SRN INDIANA...TOWARD THAT PORTION OF
NRN KY NE THRU ENE OF SDF.  OTHER CONVECTION DEVELOPING OVER SRN IL
SHOULD MOVE EWD/ESEWD INTO SRN INDIANA.  PRIND THREAT IS MARGINAL
ENOUGH NOT TO NEED WW.

AIR MASS NEAR SFC HAS BEEN STABILIZED BY PASSAGE OF EARLIER MCS
PRESENTLY OVER SERN KY.  HOWEVER...ABOVE THAT COLD POOL...STRONG LOW
LEVEL WAA IS AIDING AIR MASS DESTABILIZATION.  PARCELS WILL CONTINUE
TO BE ISENTROPICALLY LIFTED TO LFC AS THIS ELEVATED BUOYANCY PLUME
-- MUCAPE 500-1000 J/KG -- SHIFTS ACROSS OH RIVER INTO ADJACENT
PORTIONS KY.  EFFECTIVE SHEAR THROUGH CAPE-BEARING LAYER IS
FAVORABLE WITH VALUES OF AT LEAST 50-60 KT.  PRIMARY THREAT WILL BE
ISOLATED/MARGINALLY SEVERE HAIL...GIVEN LACK OF STRONGER
BUOYANCY...AND OCCASIONAL GUSTS APCHG SEVERE LIMITS MAY PENETRATE
STABLE LAYER TO REACH SFC.

..EDWARDS.. 05/27/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...RLX...JKL...ILN...LMK...IND...PAH...ILX...LSX...

38188575 38538748 38878909 38999021 39189052 39349044
39509006 39628859 39478670 38658333 38508269 38038247
37618268 37778365 38138543

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 26, 7:57 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more63 min
May 26, 8:55 PM CDTTornado WatchSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 16 more5 hr
May 26, 9:36 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 25 more54 min
May 26, 11:14 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 17 more2 hr
May 27, 11:10 AM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Christian, DeWitt and 25 more2 hr
May 27, 11:55 AM CDTSevere Thunderstorm WatchSPCAdams, Brown, Hancock, Henderson, McDonough, Pike and 3 more6 hr
May 27, 1:07 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, DeWitt, Douglas, Edgar and 12 more113 min
May 27, 1:30 PM CDTSevere Thunderstorm WatchSPCCass, Champaign, Christian, Coles, DeWitt, Douglas and 22 more7 hr
May 27, 1:52 PM CDTMesoscale DiscussionSPCAdams, Calhoun, Greene, Jersey, Macoupin, Pike and 1 more113 min
May 27, 2:25 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Clinton, Fayette, Franklin, Greene and 12 more7 hr
May 27, 3:12 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 13 more2 hr
May 27, 3:37 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clay, Clinton, Edwards, Effingham and 22 more113 min
May 27, 4:00 PM CDTSevere Thunderstorm WatchSPCClark, Clay, Crawford, Cumberland, Edwards, Effingham and 7 more4 hr
May 27, 5:01 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clinton, Fayette, Greene, Jackson and 11 more89 min
May 27, 6:00 PM CDTMesoscale DiscussionSPCChampaign, DeWitt, Douglas, Edgar, Macon, Morgan and 4 more90 min
May 27, 6:35 PM CDTMesoscale DiscussionSPCOhio, Switzerland25 min
May 27, 6:55 PM CDTTornado WatchSPCJefferson, Ohio, Switzerland5 hr
May 27, 6:22 PM CDTMesoscale DiscussionSPCAnderson, Bath, Bourbon, Carroll, Clark, Fayette and 16 more53 min

Nearby

Mesoscale Discussions in Kentucky, 2004Mesoscale Discussions in Indiana, 2004Mesoscale Discussions in Illinois, 2004Every mesoscale discussion in 2004

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.