Alert archive / Kentucky / Mesoscale Discussions in 2004
Mesoscale Discussion 899
The Storm Prediction Center issued this mesoscale discussion at May 25, 2004, 4:02 PM EST for 22 counties in Indiana; 54 counties in Kentucky; 14 counties in Ohio. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- May 25, 2004, 4:02 PM EST (21:02 UTC)
- Expired
- May 25, 2004, 5:00 PM EST
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 90 counties
Bartholomew County, IN, Brown County, IN, Clark County, IN, Crawford County, IN, Dearborn County, IN, Decatur County, IN, Dubois County, IN, Floyd County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Ohio County, IN, Orange County, IN, Perry County, IN, Ripley County, IN, Scott County, IN, Switzerland County, IN, Washington County, IN, Anderson County, KY, Bath County, KY, Boone County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Breckinridge County, KY, Bullitt County, KY, Campbell County, KY, Carroll County, KY, Carter County, KY, Clark County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Greenup County, KY, Hancock County, KY, Hardin County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Johnson County, KY, Kenton County, KY, Lawrence County, KY, Lewis County, KY, Madison County, KY, Magoffin County, KY, Mason County, KY, Meade County, KY, Menifee County, KY, Mercer County, KY, Montgomery County, KY, Morgan County, KY, Nelson 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, Spencer County, KY, Trimble County, KY, Washington County, KY, Wolfe County, KY, Woodford County, KY, Adams County, OH, Brown County, OH, Clermont County, OH, Clinton County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Lawrence County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Vinton County, OH, Warren County, OH
The radar
The Louisville radar (KLVX), 102 km from the middle of the area, began a volume at 21:02 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.0 hours before the alert went out and 146 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.
- Mixed-layer CAPE
- 996 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 656 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
652 ACUS11 KWNS 252102 SWOMCD SPC MCD 252102 KYZ000-WVZ000-OHZ000-INZ000-252200- MESOSCALE DISCUSSION 0899 NWS STORM PREDICTION CENTER NORMAN OK 0402 PM CDT TUE MAY 25 2004 AREAS AFFECTED...NORTHERN KY SOUTHERN IN SWRN OH CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 252102Z - 252200Z WW MAY BE REQUIRED SOON ACROSS THIS REGION. THUNDERSTORMS HAVE DEVELOPED ALONG A DIFFUSE E-W ORIENTED SURFACE BOUNDARY ALONG THE OH RIVER VALLEY FROM SRN IND INTO NERN KY. AIR MASS REMAINS VERY UNSTABLE WITH MLCAPES NEAR 3000 J/KG...WITH LITTLE IF ANY CAP. GIVEN THE STRENGTH OF DEEP LAYER SHEAR /AROUND 40 KT FROM 0-6 KM/...ENVIRONMENT IS FAVORABLE FOR SEVERE THUNDERSTORMS INCLUDING SUPERCELLS. HOWEVER...MORE UNIDIRECTIONAL VERTICAL WIND PROFILE SUGGESTS MOST LIKELY SCENARIO WILL BE GRADUAL EVOLUTION INTO ONE OR MORE SMALL LINES/BOW ECHOES WITH ACTIVITY CURRENTLY UPSTREAM OVER SRN IL AS STORMS TRACK EWD ALONG THE OH RIVER VALLEY THIS EVENING. SINCE LEADING DISCRETE DEVELOPMENT WILL ALSO POSE A RISK OF SEVERE...WW MAY BE NEEDED SOON. ..EVANS.. 05/25/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...RLX...JKL...ILN...LMK...IND...PAH... 39238697 39628240 37638253 37638699
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 3:00 AM EST | Severe Thunderstorm Watch | SPC | Bartholomew, Blackford, Boone, Brown, Clark, Clay and 58 more | 3 hr |
| May 25, 4:23 AM EST | Mesoscale Discussion | SPC | Bartholomew, Blackford, Clark, Crawford, Dearborn, Decatur and 28 more | 97 min |
| May 25, 9:19 AM EST | Mesoscale Discussion | SPC | Clark, Crawford, Daviess, Dearborn, Dubois, Floyd and 20 more | 86 min |
| May 25, 2:39 PM EST | Mesoscale Discussion | SPC | Gibson, Pike, Posey, Vanderburgh, Warrick | 96 min |
| May 25, 3:00 PM EST | Severe Thunderstorm Watch | SPC | Daviess, Gibson, Knox, Pike, Posey, Spencer and 3 more | 6 hr |
| May 25, 4:30 PM EST | Severe Thunderstorm Watch | SPC | Clark, Crawford, Dubois, Floyd, Greene, Harrison and 14 more | 6 hr |
| May 25, 5:03 PM EST | Mesoscale Discussion | SPC | Daviess, Gibson, Greene, Knox, Pike, Posey and 3 more | 87 min |
| May 25, 11:54 AM EST | Mesoscale Discussion | SPC | Ashland, Ashtabula, Athens, Belmont, Carroll, Columbiana and 42 more | 96 min |
| May 25, 12:30 PM EST | Severe Thunderstorm Watch | SPC | Athens, Belmont, Carroll, Columbiana, Coshocton, Cuyahoga and 22 more | 7 hr |
| May 25, 2:57 PM EST | Mesoscale Discussion | SPC | Athens, Belmont, Carroll, Columbiana, Coshocton, Cuyahoga and 21 more | 63 min |
Nearby
Mesoscale Discussions in Kentucky, 2004Mesoscale Discussions in Indiana, 2004Mesoscale Discussions in Ohio, 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.