Alert archive / Ohio / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 333, NWS Cleveland, OH

July 21, 1998Seneca County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Jul 21, 1998, 8:50 PM EDT for Seneca County, Ohio. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 21, 1998, 8:50 PM EDT (00:50 UTC)
Expired
Jul 21, 1998, 9:40 PM EDT
In force
50 min
Issued by
NWS Cleveland, OH
Area
Whole counties

County Seneca County, OH

The radar

The Cleveland radar (KCLE), 111 km from the middle of the area, began a volume at 00:50 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 21, 7:00 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 0.8 hours before the alert went out and 179 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, Detroit, MI at 00:00Z on 1998-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 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, Detroit, MI at 00:00Z on 1998-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 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
23 J/kg
Mixed-layer CIN
-374 J/kg
Mixed-layer LCL
1967 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
247 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

459 
WUUS1 KCLE 220049 RRA
SVRCLE
OHC147-220140-

BULLETIN - EAS ACTIVATION/IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
850 PM EDT TUE JUL 21 1998

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS EXTENDED THE

* SEVERE THUNDERSTORM WARNING FOR...
  SENECA COUNTY IN NORTHWESTERN OHIO

* UNTIL 940 PM EDT

* AT 848 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES WEST OF TIFFIN MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL MOVE NEAR...
  TIFFIN
  MELMORE
  ATTICA
  BLOOMVILLE

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL. GO INSIDE
A STURDY BUILDING AND STAY AWAY FROM WINDOWS

BARJENBRUCH

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cleveland, OH wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 2:45 AM EDT, 18 hours 5 minutes earlier.

Area forecast discussion, Jul 21, 2:45 AM EDT, 18 hours 5 minutes before
FORECAST COORDINATION MESSAGE
NATIONAL WEATHER SERVICE WILMINGTON OH
245 AM EDT TUE JUL 21 1998

FORECAST CHALLENGE...CONVECTION POTENTIAL THROUGH PERIOD.

AT THE MOMENT...IR AND RADAR IMAGERY SHOWING BOW ECHO IN SOUTHERN
ONTARIO AND NORTHERN OH.  SYSTEM WILL STAY WELL NORTH OF CWA.  KILN
AND KIWX SHOWING SOME A SMALL CLUSTER OF TSRA BETWEEN FWA AND LIMA WHICH
ACCORDING TO LAPS DATA IS IN AN AREA OF MOISTURE CONVERGENCE.

MODELS ARE PRETTY SIMILAR WITH THE OVERALL PATTERN.  BERMUDA HIGH
BUILDS IN OVER MUCH OF SOUTHERN OHIO WITH A 700 MB CAP OF 9 TO 10
DEGREES THROUGH MUCH OF THE FORECAST PERIOD.  THIS WILL SUPPRESS
CONVECTION OVER MUCH OF FORECAST AREA...ESPECIALLY SOUTHERN 2/3.
THE MAIN ACTIVITY WILL REMAIN ALONG A NEARLY STATIONARY BOUNDARY IN
SOUTHERN WI/MI AND NORTHERN IL/IN/OH.  THE NORTHERN JET STREAM WILL
PROVIDE THE UPPER LEVEL SUPPORT.  IN FACT ALL THREE MODELS SHOW THE
WHOLE BOUNDARY LIGHTING UP OVERNIGHT TONIGHT.  THE BERMUDA HIGH
BEGINS TO SLIDE SOUTHWARD ON WEDNESDAY AS STATIONARY BOUNDARY DRIFTS
SOUTH INTO NORTHERN AND CENTRAL IL/IN/OH ALONG WITH ASSOCIATED UPPER
LEVEL SUPPORT.

FWC GUIDANCE HAS PRETTY GOOD HANDLE ON POPS AND TEMPS THROUGH PERIOD.
THINK SUMMER TIME POP (30%) NORTH OF DAY AND CMH WOULD BE REASONABLE
FOR TODAY AND ISOLATED OR NO MENTION REST OF CWA.

DAY 094/072 090/072 085 114
CMH 094/073 091/071 084 214
CVG 095/073 091/071 084 114
PHM 095/071 092/072 087 114
 TIPTON

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 21, 8:01 PM EDTSevere Thunderstorm WarningCLECuyahoga64 min
Jul 21, 8:09 PM EDTSevere Thunderstorm WarningCLEAshtabula, Geauga, Lake61 min
Jul 21, 8:26 PM EDTSevere Thunderstorm WarningCLEPortage, Summit64 min
Jul 21, 8:26 PM EDTSevere Thunderstorm WarningCLEMedina64 min
Jul 21, 8:35 PM EDTSevere Thunderstorm WarningCLETrumbull65 min
Jul 21, 9:03 PM EDTSevere Thunderstorm WarningCLEHuron62 min
Jul 21, 9:10 PM EDTSevere Thunderstorm WarningCLEMahoning65 min
Jul 21, 9:21 PM EDTSevere Thunderstorm WarningCLELucas, Wood64 min
Jul 21, 9:36 PM EDTTornado WarningCLEWood64 min
Jul 21, 9:43 PM EDTSevere Thunderstorm WarningCLEOttawa, Sandusky62 min
Jul 21, 10:03 PM EDTSevere Thunderstorm WarningCLEHancock, Seneca62 min
Jul 21, 10:05 PM EDTSevere Thunderstorm WarningCLEErie65 min
Jul 21, 10:33 PM EDTFlash Flood WarningCLELorain3 hr
Jul 21, 10:38 PM EDTTornado WarningCLEErie, Huron47 min
Jul 21, 10:48 PM EDTSevere Thunderstorm WarningCLELorain62 min
Jul 21, 11:04 PM EDTTornado WarningCLELorain51 min
Jul 21, 11:18 PM EDTSevere Thunderstorm WarningCLECuyahoga, Medina62 min
Jul 21, 11:23 PM EDTSevere Thunderstorm WarningCLEAshland, Holmes, Knox, Richland62 min
Jul 21, 11:23 PM EDTSevere Thunderstorm WarningCLEWayne62 min
Jul 21, 11:45 PM EDTSevere Thunderstorm WarningCLEPortage, Stark, Summit60 min
Jul 22, 12:09 AM EDTSevere Thunderstorm WarningCLEMahoning, Trumbull61 min

Nearby

Severe Thunderstorm Warnings in Ohio, 1998Every severe thunderstorm warning in 1998

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.