Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 935

May 11, 200310 counties in Indiana; 8 counties in Kentucky; 50 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 11, 2003, 12:28 AM EDT for 10 counties in Indiana; 8 counties in Kentucky; 50 counties in Ohio. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 11, 2003, 12:28 AM EDT (04:28 UTC)
Expired: May 11, 2003, 2:30 AM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 68 counties

Dearborn County, IN, Fayette County, IN, Franklin County, IN, Jay County, IN, Ohio County, IN, Randolph County, IN, Ripley County, IN, Switzerland County, IN, Union County, IN, Wayne County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Pendleton County, KY, Adams County, OH, Allen County, OH, Ashland County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Ross County, OH, Sandusky County, OH, Scioto County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Warren County, OH, Wayne County, OH, Wyandot County, OH

The radar

The Cincinnati radar (KILN), 39 km from the middle of the area, began a volume at 04:28 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 4.5 hours before the alert went out and 39 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1265 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 897 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 411 m²/s²
0-3 km storm-relative helicity: 392 m²/s²
Significant tornado parameter: 3.2
Supercell composite: 17.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

379 
ACUS11 KWNS 110428
SWOMCD
SPC MCD 110428 
OHZ000-KYZ000-INZ000-110630-

MESOSCALE DISCUSSION 0935
NWS STORM PREDICTION CENTER NORMAN OK
1128 PM CDT SAT MAY 10 2003

AREAS AFFECTED...ERN IND THROUGH MUCH OF OH

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 110428Z - 110630Z

THREAT FOR DAMAGING WIND AND ISOLATED TORNADOES EXPECTED TO INCREASE
OVER THE NEXT FEW HOURS. AREA WILL CONTINUE TO BE MONITORED FOR
POSSIBLE WW.

THE LATEST SURFACE ANALYSIS SHOWS A WEAK BOUNDARY ACROSS SRN/WRN OH
NWWD THROUGH NRN IND. THE ATMOSPHERE REMAINS MODERATELY UNSTABLE S
OF THIS BOUNDARY WITH MORE MARGINAL INSTABILITY FARTHER NE INTO ERN
OH. HOWEVER...THE ATMOSPHERE SHOULD DESTABILIZE NEWD WITH TIME AS
HIGHER THETA-E AIR ADVECTS NEWD ALONG SWLY LOW LEVEL JET. POTENTIAL
FOR DAMAGING WIND AND ISOLATED TORNADOES WILL SPREAD EWD LATER
TONIGHT AS STORMS DEVELOP EWD TOWARD OH.


..DIAL.. 05/11/2003

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

ATTN...WFO...PBZ...RLX...CLE...ILN...LMK...IWX...IND...

38498530 40558526 41598310 40758156 38748287

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 9:05 PM EDT	Tornado Watch	SPC	Benton, Jasper, Lake, Newton, Porter	6 hr
May 10, 9:41 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Boone, Brown, Clay, Crawford, Daviess and 39 more	2 hr
May 10, 9:45 PM EDT	Tornado Watch	SPC	Posey	5 hr
May 10, 10:10 PM EDT	Tornado Watch	SPC	Bartholomew, Boone, Brown, Clark, Clay, Clinton and 40 more	5 hr
May 10, 11:40 PM EDT	Mesoscale Discussion	SPC	DeKalb, Elkhart, Kosciusko, LaGrange, LaPorte, Marshall and 5 more	2 hr
May 10, 11:56 PM EDT	Mesoscale Discussion	SPC	Benton, Jasper, Lake, Newton, Porter	94 min
May 11, 12:00 AM EDT	Tornado Watch	SPC	Adams, Allen, Cass, DeKalb, Elkhart, Fulton and 15 more	6 hr
May 11, 12:20 AM EDT	Tornado Watch	SPC	Harrison, Perry, Spencer	6 hr
May 11, 2:46 AM EDT	Mesoscale Discussion	SPC	Bartholomew, Boone, Brown, Clark, Clay, Clinton and 43 more	89 min
May 10, 8:06 PM EDT	Mesoscale Discussion	SPC	Ballard, Calloway, Carlisle, Crittenden, Fulton, Graves and 5 more	54 min
May 10, 9:28 PM EDT	Mesoscale Discussion	SPC	Breathitt, Floyd, Johnson, Knott, Magoffin, Martin and 1 more	62 min
May 10, 11:04 PM EDT	Mesoscale Discussion	SPC	Allen, Barren, Breckinridge, Butler, Caldwell, Calloway and 23 more	116 min
May 11, 5:16 AM EDT	Mesoscale Discussion	SPC	Adair, Anderson, Barren, Bath, Bell, Bourbon and 68 more	59 min
May 11, 6:05 AM EDT	Severe Thunderstorm Watch	SPC	Bath, Bell, Bourbon, Boyle, Breathitt, Casey and 38 more	4 hr
May 11, 6:55 AM EDT	Severe Thunderstorm Watch	SPC	Bell, Harlan	5 hr
May 11, 10:30 AM EDT	Mesoscale Discussion	SPC	Ashland, Ashtabula, Athens, Belmont, Carroll, Columbiana and 26 more	2 hr
May 11, 11:45 AM EDT	Tornado Watch	SPC	Ashtabula, Belmont, Carroll, Columbiana, Guernsey, Harrison and 5 more	5 hr
May 11, 2:52 PM EDT	Mesoscale Discussion	SPC	Ashtabula, Belmont, Carroll, Columbiana, Guernsey, Harrison and 5 more	113 min

Nearby

Mesoscale Discussions in Ohio, 2003 Mesoscale Discussions in Indiana, 2003 Mesoscale Discussions in Kentucky, 2003 Every mesoscale discussion in 2003

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.