Alert archive / Ohio / Tornado Watches in 2003

Tornado Watch 933

September 27, 20034 states

The Storm Prediction Center issued this tornado watch at Sep 27, 2003, 12:40 AM EDT for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Sep 27, 2003, 12:40 AM EDT (04:40 UTC)
Expired
Sep 27, 2003, 6:00 AM EDT
In force
5 hr
Issued by
the Storm Prediction Center
All 106 counties

Anderson County, KY, Bath County, KY, Boone County, KY, Bourbon County, KY, Bracken County, KY, Bullitt County, KY, Campbell 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, Greenup County, KY, Harrison County, KY, Henry County, KY, Jessamine County, KY, Kenton County, KY, Lewis County, KY, Madison County, KY, Mason County, KY, Menifee County, KY, Mercer County, KY, Montgomery County, KY, Morgan County, KY, Nelson County, KY, Nicholas 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, Washington County, KY, Wolfe County, KY, Woodford County, KY, Adams County, OH, Ashland County, OH, Ashtabula County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Carroll County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Cuyahoga County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Geauga County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Lawrence County, OH, Licking County, OH, Lorain County, OH, Madison County, OH, Mahoning County, OH, Medina County, OH, Meigs County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Wayne County, OH, Beaver County, PA, Butler County, PA, Crawford County, PA, Forest County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Warren County, PA, Hancock County, WV

The radar

The Cincinnati radar (KILN), 52 km from the middle of the area, began a volume at 04:42 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.

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 4.7 hours before the alert went out and 50 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 00:00Z on 2003-09-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 780 joules per kilogram.LCLLFCEL10008507005003002001001 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, Cncnati-Daytn, OH at 00:00Z on 2003-09-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 368 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
780 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
699 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
368 m²/s²
0-3 km storm-relative helicity
432 m²/s²
Significant tornado parameter
0.0
Supercell composite
8.5

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 270440
SEL3  
SPC WW 270440
INZ000-KYZ000-OHZ000-PAZ000-WVZ000-LEZ000-271000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 933 
NWS STORM PREDICTION CENTER NORMAN OK 
1240 AM EDT SAT SEP 27 2003

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       SOUTHEAST INDIANA
       CENTRAL AND EASTERN KENTUCKY
       MUCH OF OHIO
       NORTHWEST PENNSYLVANIA
       THE WEST VIRGINIA PANHANDLE
       LAKE ERIE

EFFECTIVE THIS SATURDAY MORNING FROM 1240 AM UNTIL 600 AM EDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST
OF A LINE FROM 45 MILES NORTH NORTHWEST OF FRANKLIN PENNSYLVANIA
TO 25 MILES SOUTH SOUTHWEST OF LEXINGTON KENTUCKY.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 932. WATCH NUMBER 932 WILL NOT BE IN EFFECT AFTER
1240 AM EDT. CONTINUE...WW 931...


DISCUSSION...SQUALL LINE CONTINUES TO TRACK EASTWARD ACROSS
OH/IN...WITH NUMEROUS CELLS FORMING AHEAD OF LINE.  LOW LEVEL
VERTICAL SHEAR PROFILES ARE VERY FAVORABLE FOR SUPERCELLS AND
ISOLATED TORNADOES.  ACTIVITY SHOULD SPREAD EASTWARD OVERNIGHT INTO
PARTS OF WESTERN PA...EASTERN OH...AND EASTERN KY.  DAMAGING WINDS
WILL ALSO BE A THREAT WITH BOW/LEWP STRUCTURES ALONG SQUALL LINE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24040.


...HART

415,0784 374,0832 374,0860 415,0813

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 26, 8:56 PM EDTMesoscale DiscussionSPCBoone, Henderson94 min
Sep 26, 9:20 PM EDTTornado WatchSPCBoone, Campbell, Carroll, Gallatin, Henderson, Kenton and 3 more6 hr
Sep 27, 12:06 AM EDTMesoscale DiscussionSPCBoone, Campbell, Carroll, Gallatin, Grant, Henderson and 6 more84 min
Sep 27, 3:12 AM EDTMesoscale DiscussionSPCAdair, Allen, Barren, Butler, Calloway, Casey and 21 more93 min
Sep 27, 3:37 AM EDTMesoscale DiscussionSPCAnderson, Bath, Bourbon, Bracken, Bullitt, Campbell and 36 more113 min
Sep 27, 5:15 AM EDTMesoscale DiscussionSPCBath, Bourbon, Carter, Clark, Elliott, Estill and 18 more60 min
Sep 27, 11:42 AM EDTMesoscale DiscussionSPCBell, Harlan, Knox, Leslie, Letcher108 min
Sep 27, 2:35 AM EDTTornado WatchSPCErie5 hr
Sep 27, 2:22 PM EDTMesoscale DiscussionSPCAdams, Bedford, Bradford, Centre, Clinton, Columbia and 16 more113 min
Sep 27, 4:05 PM EDTSevere Thunderstorm WatchSPCBedford, Blair, Cambria, Cameron, Centre, Clearfield and 11 more5 hr
Sep 27, 6:52 PM EDTMesoscale DiscussionSPCBedford, Blair, Centre, Clinton, Franklin, Fulton and 5 more53 min
Sep 27, 2:41 PM EDTMesoscale DiscussionSPCMonroe2 hr

Nearby

Tornado Watches in Ohio, 2003Tornado Watches in Kentucky, 2003Tornado Watches in Pennsylvania, 2003Every tornado watch 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.