Alert archive / Ohio / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 21, NWS Pittsburgh, PA

May 18, 1997Columbiana County, Ohio

NWS Pittsburgh, PA issued this severe thunderstorm warning at May 18, 1997, 5:51 PM EDT for Columbiana County, Ohio. It was in force for 69 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
May 18, 1997, 5:51 PM EDT (21:51 UTC)
Expired
May 18, 1997, 7:00 PM EDT
In force
69 min
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Columbiana County, OH

The radar

The Pittsburgh radar (KPBZ), 54 km from the middle of the area, began a volume at 21:53 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
May 18, 3:45 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.9 hours before the alert went out and 70 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 12:00Z on 1997-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 1997-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 448 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
820 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
448 m²/s²
0-3 km storm-relative helicity
540 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

902 
WUUS1 KPIT 182152 RRA
SVRPIT
OHC029-182300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
551 PM EDT SUN MAY 18 1997
 
THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 PM EDT
FOR THE FOLLOWING LOCATION...
 
IN EAST CENTRAL OHIO
 
   ...COLUMBIANA COUNTY
 
SEVERE STORMS NEAR CANTON OHIO WILL MOVE EAST ACROSS COLUMBIANA COUNTY
BETWEEN 600 AND 700 PM. THESE STORMS HAVE HAD A PAST HISTORY OF DAMAGING
WINDS AND LARGE HAIL.
 
THESE ARE A DANGEROUS STORMS.  IF YOU ARE IN THEIR PATH...PREPARE FOR
DAMAGING WIND OVER 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING.  TAKE
SHELTER INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
 
PM

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 18, 4:24 PM EDTSevere Thunderstorm WarningPBZMonroe36 min
May 18, 4:38 PM EDTSevere Thunderstorm WarningPBZBelmont52 min
May 18, 6:13 PM EDTSevere Thunderstorm WarningPBZCarroll, Tuscarawas62 min
May 18, 6:42 PM EDTSevere Thunderstorm WarningPBZCoshocton63 min
May 18, 7:15 PM EDTSevere Thunderstorm WarningPBZCarroll30 min
May 18, 7:49 PM EDTSevere Thunderstorm WarningPBZJefferson26 min

Nearby

Severe Thunderstorm Warnings in Ohio, 1997Every severe thunderstorm warning in 1997

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.