Alert archive / Ohio / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 653

August 6, 200030 counties in Ohio; 19 counties in Pennsylvania; 4 counties in West Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Aug 6, 2000, 9:30 PM EDT for 30 counties in Ohio; 19 counties in Pennsylvania; 4 counties in West Virginia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Aug 6, 2000, 9:30 PM EDT (01:30 UTC)
Expired
Aug 7, 2000, 3:00 AM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 53 counties

Ashland County, OH, Ashtabula County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Erie County, OH, Geauga County, OH, Guernsey County, OH, Harrison County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Licking County, OH, Lorain County, OH, Mahoning County, OH, Medina County, OH, Morrow County, OH, Muskingum County, OH, Portage County, OH, Richland County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Wayne County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Cambria County, PA, Clarion County, PA, Crawford County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Somerset County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV

The radar

The Cleveland radar (KCLE), 62 km from the middle of the area, began a volume at 01:30 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.

Warnings issued inside it

26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Aug 6, 9:48 PM EDTSevere Thunderstorm WarningPBZJefferson27 min
Aug 6, 10:03 PM EDTSevere Thunderstorm WarningPBZWashington42 min
Aug 6, 10:05 PM EDTSevere Thunderstorm WarningPBZArmstrong55 min
Aug 6, 10:11 PM EDTSevere Thunderstorm WarningPBZAllegheny64 min
Aug 6, 10:17 PM EDTSevere Thunderstorm WarningCLECrawford, Huron43 min
Aug 6, 10:17 PM EDTSevere Thunderstorm WarningCLEErie43 min
Aug 6, 10:27 PM EDTSevere Thunderstorm WarningCLERichland48 min
Aug 6, 10:28 PM EDTFlash Flood WarningPBZAllegheny4 hr
Aug 6, 10:37 PM EDTSevere Thunderstorm WarningPBZWestmoreland53 min
Aug 6, 10:39 PM EDTSevere Thunderstorm WarningCLEAshland, Lorain51 min
Aug 6, 10:39 PM EDTFlash Flood WarningPBZWestmoreland3 hr
Aug 6, 11:03 PM EDTSevere Thunderstorm WarningCLEMedina, Wayne42 min
Aug 6, 11:06 PM EDTSevere Thunderstorm WarningCLECuyahoga54 min
Aug 6, 11:18 PM EDTSevere Thunderstorm WarningCLEStark, Summit57 min
Aug 6, 11:31 PM EDTSevere Thunderstorm WarningCLEGeauga, Portage59 min
Aug 6, 11:38 PM EDTSevere Thunderstorm WarningPBZCarroll, Columbiana67 min
Aug 6, 11:38 PM EDTSevere Thunderstorm WarningPBZTuscarawas67 min
Aug 6, 11:43 PM EDTSevere Thunderstorm WarningCLEMahoning, Trumbull62 min
Aug 7, 12:09 AM EDTSevere Thunderstorm WarningPBZJefferson66 min
Aug 7, 12:09 AM EDTSevere Thunderstorm WarningPBZLawrence66 min
Aug 7, 12:16 AM EDTSevere Thunderstorm WarningPBZMercer59 min
Aug 7, 12:18 AM EDTSevere Thunderstorm WarningPBZHarrison57 min
Aug 7, 12:21 AM EDTSevere Thunderstorm WarningCLECrawford54 min
Aug 7, 12:36 AM EDTSevere Thunderstorm WarningPBZAllegheny, Butler54 min
Aug 7, 1:27 AM EDTFlash Flood WarningPBZAllegheny, Westmoreland4 hr
Aug 7, 1:30 AM EDTFlash Flood WarningPBZWashington4 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 1.5 hours before the alert went out and 123 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, Pittsburgh, PA at 00:00Z on 2000-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2398 joules per kilogram.LCLEL10008507005003002001001 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, Pittsburgh, PA at 00:00Z on 2000-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 272 square meters per square second.193958Sfc1 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
2398 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
723 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
272 m²/s²
0-3 km storm-relative helicity
361 m²/s²
Significant tornado parameter
3.8
Supercell composite
24.1

Open this sounding in Storm Lab

The text

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

237 
WWUS9 KMKC 070104
SEL3  

SEL3  
MKC WW 070058
OHZ000-PAZ000-WVZ000-LEZ000-070700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 653
STORM PREDICTION CENTER NORMAN OK
858 PM EDT SUN AUG 6 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   EASTERN OHIO                               
   WESTERN PENNSYLVANIA                       
   THE WESTERN PANHANDLE OF WEST VIRGINIA                      
   LAKE ERIE                          

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 930 PM UNTIL
300 AM EDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 75 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 25 MILES WEST NORTHWEST OF MANSFIELD
OHIO TO 30 MILES SOUTH SOUTHEAST OF DUBOIS PENNSYLVANIA.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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...  CONTINUE...WW 651...WW 652...

DISCUSSION...CONVECTIVE CLUSTER/BOW ECHO WITH A HISTORY OF WIND
DAMAGE MOVING EASTWARD INTO WATCH AREA ALONG AXIS OF 3000 TO 4000
J/KG CAPES. 50 KT MID LEVEL SPEED MAX WILL MAINTAIN POTENTIAL FOR
DAMAGING WINDS AND A FEW LARGE HAILSTONES. 

AVIATION...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 27050.

...ROGASH

420,0825 415,0784 394,0784 395,0825

Nearby

Severe Thunderstorm Watches in Ohio, 2000Severe Thunderstorm Watches in Pennsylvania, 2000Severe Thunderstorm Watches in West Virginia, 2000Every severe thunderstorm watch in 2000

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.