Alert archive / Pennsylvania / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 307

May 19, 19976 counties in Ohio; 38 counties in Pennsylvania; 4 counties in West Virginia

The Storm Prediction Center issued this severe thunderstorm watch at May 19, 1997, 5:15 PM EDT for 6 counties in Ohio; 38 counties in Pennsylvania; 4 counties in West Virginia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 19, 1997, 5:15 PM EDT (21:15 UTC)
Expired
May 19, 1997, 11:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 48 counties

Belmont County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Noble County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Blair County, PA, Bradford County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Fayette County, PA, Forest County, PA, Fulton County, PA, Greene County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lawrence County, PA, Lycoming County, PA, McKean County, PA, Mifflin County, PA, Montour County, PA, Potter County, PA, Snyder County, PA, Somerset County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union 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 Pittsburgh radar (KPBZ), 75 km from the middle of the area, began a volume at 21:15 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

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

IssuedProductOfficeCountiesLasted
May 19, 5:19 PM EDTSevere Thunderstorm WarningPBZBeaver26 min
May 19, 5:20 PM EDTSevere Thunderstorm WarningCTPMcKean55 min
May 19, 5:24 PM EDTSevere Thunderstorm WarningPBZAllegheny51 min
May 19, 5:56 PM EDTSevere Thunderstorm WarningPBZWestmoreland49 min
May 19, 6:12 PM EDTSevere Thunderstorm WarningPBZBelmont48 min
May 19, 6:19 PM EDTSevere Thunderstorm WarningPBZArmstrong, Indiana41 min
May 19, 6:21 PM EDTSevere Thunderstorm WarningPBZWashington54 min
May 19, 6:23 PM EDTSevere Thunderstorm WarningCTPClearfield, Elk67 min
May 19, 6:26 PM EDTSevere Thunderstorm WarningPBZMarshall34 min
May 19, 6:31 PM EDTSevere Thunderstorm WarningCTPCameron29 min
May 19, 6:34 PM EDTSevere Thunderstorm WarningCTPClinton56 min
May 19, 6:37 PM EDTFlash Flood WarningPBZAllegheny53 min
May 19, 6:37 PM EDTSevere Thunderstorm WarningPBZAllegheny53 min
May 19, 6:40 PM EDTFlash Flood WarningPBZBelmont, Noble3 hr
May 19, 6:40 PM EDTSevere Thunderstorm WarningCTPCentre65 min
May 19, 6:40 PM EDTFlash Flood WarningPBZWashington3 hr
May 19, 6:46 PM EDTFlash Flood WarningPBZWestmoreland3 hr
May 19, 6:46 PM EDTSevere Thunderstorm WarningPBZWestmoreland3 hr
May 19, 6:47 PM EDTSevere Thunderstorm WarningCTPCambria58 min
May 19, 6:57 PM EDTSevere Thunderstorm WarningPBZIndiana33 min
May 19, 7:04 PM EDTSevere Thunderstorm WarningCTPLycoming56 min
May 19, 7:07 PM EDTSevere Thunderstorm WarningPBZFayette68 min
May 19, 7:29 PM EDTSevere Thunderstorm WarningCTPBlair61 min
May 19, 7:36 PM EDTFlash Flood WarningPBZAllegheny2 hr
May 19, 7:41 PM EDTSevere Thunderstorm WarningCTPSullivan64 min
May 19, 7:41 PM EDTSevere Thunderstorm WarningCTPMontour, Northumberland, Union64 min
May 19, 7:46 PM EDTSevere Thunderstorm WarningCTPHuntingdon, Mifflin59 min
May 19, 7:50 PM EDTSevere Thunderstorm WarningCTPJuniata, Snyder55 min

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.3 hours before the alert went out and 69 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 1997-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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, Pittsburgh, PA at 12:00Z on 1997-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
10 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
626 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 18, 11:00 PM EDTTornado WatchSPCAllen, Ashland, Ashtabula, Auglaize, Belmont, Carroll and 49 more6 hr
May 19, 6:00 PM EDTSevere Thunderstorm WatchSPCAthens, Gallia, Hocking, Jackson, Lawrence, Meigs and 7 more4 hr

Nearby

Severe Thunderstorm Watches in Pennsylvania, 1997Severe Thunderstorm Watches in Ohio, 1997Severe Thunderstorm Watches in West Virginia, 1997Every severe thunderstorm watch 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.