Alert archive / Ohio / Mesoscale Discussions in 2003

Mesoscale Discussion 918

May 10, 200312 counties in Kentucky; 14 counties in Ohio; Cabell County, West Virginia

The Storm Prediction Center issued this mesoscale discussion at May 10, 2003, 3:46 PM EDT for 12 counties in Kentucky; 14 counties in Ohio; Cabell County, West Virginia. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
May 10, 2003, 3:46 PM EDT (19:46 UTC)
Expired
May 10, 2003, 4:45 PM EDT
In force
59 min
Issued by
the Storm Prediction Center
All 27 counties

Boyd County, KY, Bracken County, KY, Campbell County, KY, Fleming County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Lewis County, KY, Mason County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Brown County, OH, Clermont County, OH, Clinton County, OH, Fayette County, OH, Gallia 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, Cabell County, WV

The radar

The Cincinnati radar (KILN), 63 km from the middle of the area, began a volume at 19:49 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, 7.8 hours before the alert went out and 63 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, Cncnati-Daytn, OH at 12:00Z on 2003-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 149 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2003-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 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
149 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
754 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
14 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

601 
ACUS11 KWNS 101946
SWOMCD
SPC MCD 101946 
OHZ000-WVZ000-KYZ000-102045-

MESOSCALE DISCUSSION 0918
NWS STORM PREDICTION CENTER NORMAN OK
0246 PM CDT SAT MAY 10 2003

AREAS AFFECTED...SWRN/SCENTRL OH AND FAR NRN KY

CONCERNING...TORNADO WATCH 336...

VALID 101946Z - 102045Z

LINE OF STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO TRACK EWD
ACROSS THE REMAINDER OF SWRN INTO SCENTRAL OH. ALTHOUGH THE
CONVECTION REMAINS MOSTLY ELEVATED...THERE WILL BE SOME POTENTIAL
FOR DAMAGING WINDS. OVERALL TREND IN THIS CONVECTION HAS BEEN
WEAKENING AND ANOTHER WW EAST OF WW 336 OVER ERN OH IS NOT
ANTICIPATED. SURFACE STATIONARY BOUNDARY AT 19Z EXTENDS FROM 20 S OF
CVG TO NEAR HTS. A SEVERE THUNDERSTORM OVER FAR NRN KY TO THE SOUTH
OF CVG WILL POSE THE GREATEST THREAT FOR ISOLATED TORNADOES AS IT
RIDES ALONG THIS BOUNDARY AND INTO WW 339 BY 10/21Z. ANOTHER SEVERE
THUNDERSTORM FARTHER SOUTH WILL TRACK EWD CROSSING JUST NORTH OF THE
LEX AREA AND WILL CONTINUE TO POSE A THREAT FOR DAMAGING WINDS/LARGE
HAIL AND POSSIBLY A TORNADO BEFORE IT MOVES INTO WW 339 AROUND
10/2130Z.

..CROSBIE.. 05/10/2003

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

ATTN...WFO...RLX...JKL...ILN...LMK...

38388508 39668377 39638215 38328216

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 10, 4:33 AM EDTMesoscale DiscussionSPCAnderson, Bath, Boone, Bourbon, Boyd, Bracken and 45 more87 min
May 10, 10:25 AM EDTMesoscale DiscussionSPCBreckinridge, Daviess, Hancock, Henderson, McLean, Union and 1 more2 hr
May 10, 11:12 AM EDTMesoscale DiscussionSPCBoone, Bracken, Campbell, Greenup, Harrison, Kenton and 4 more2 hr
May 10, 11:54 AM EDTMesoscale DiscussionSPCBallard, Boone, Campbell, Carroll, Gallatin, Henderson and 4 more66 min
May 10, 12:00 PM EDTTornado WatchSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 5 more5 hr
May 10, 12:41 PM EDTMesoscale DiscussionSPCBell, Breathitt, Clay, Floyd, Harlan, Jackson and 13 more2 hr
May 10, 1:20 PM EDTTornado WatchSPCBell, Boyd, Breathitt, Carter, Clay, Elliott and 19 more6 hr
May 10, 2:04 PM EDTMesoscale DiscussionSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 5 more86 min
May 10, 3:27 PM EDTMesoscale DiscussionSPCBell, Boyd, Breathitt, Carter, Clay, Elliott and 20 more93 min
May 10, 5:56 PM EDTMesoscale DiscussionSPCBoyd, Breathitt, Carter, Elliott, Floyd, Greenup and 10 more94 min
May 10, 6:30 PM EDTTornado WatchSPCBoyd, Breathitt, Carter, Elliott, Floyd, Greenup and 11 more6 hr
May 9, 8:57 PM EDTMesoscale DiscussionSPCAthens, Hocking, Meigs63 min
May 9, 11:40 PM EDTSevere Thunderstorm WatchSPCAllen, Defiance, Fulton, Hancock, Henry, Lucas and 5 more5 hr

Nearby

Mesoscale Discussions in Ohio, 2003Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in West Virginia, 2003Every 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.