Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 170, NWS Cleveland, OH

June 29, 1994Mercer County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jun 29, 1994, 7:21 PM EDT for Mercer County, Pennsylvania. It was in force for 69 min.

The area

The counties it named.

The facts

Issued: Jun 29, 1994, 7:21 PM EDT (23:21 UTC)
Expired: Jun 29, 1994, 8:30 PM EDT
In force: 69 min
Issued by: NWS Cleveland, OH
Area: Whole counties

County Mercer County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 11.4 hours before the alert went out and 100 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1570 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 280 m²/s²
0-3 km storm-relative helicity: 286 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.

000 
WUUS1 KYNG 292321
SVRCLE
PAC085-300030-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
721 PM EDT WED JUN 29 1994
 
THE NATIONAL WEATHER SERVICE IN YOUNGSTOWN HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  830 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST PENNSYLVANIA
 
   ...MERCER COUNTY
 
AT 715 PM EDT NATIONAL WEATHER SERVICE DOPPLAR INDICATED A SEVERE
THUNDERSTORM MOVING INTO WESTERN MERCER COUNTY. THIS STORM HAS A
HISTORY OF DAMAGING WINDS AND LARGE HAIL. IT WILL AFFECT GREENVILLE
AND MERCER BY 730 PM EDT.
 
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
 
WILKINSON

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.

In the hours before

Local storm report, Jun 29, 4:44 PM EDT, 2 hours 37 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE ERIE, PA
444 PM EDT WED JUN 29 1994

STORM REPORTS FOR WEDNESDAY JUNE 29 1994

TIME  EDT    EVENT
.........................................................................
416 PM EDT   SKYWARN SPOTTER IN EASTERN ERIE COUTNY...5 MILES ENE
             OF WATERFORD REPORTED DIME TO MARBLE SIZE HAIL...AND
             WIND GUSTS ESTIMATED AT 50 MPH.

WSO/ERIE

Local storm report, Jun 29, 4:47 PM EDT, 2 hours 34 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE ERIE, PA
444 PM EDT WED JUN 29 1994

STORM REPORTS FOR WEDNESDAY JUNE 29 1994

TIME  EDT    EVENT
....................................................................l.....
416 PM EDT   SKYWARN SPOTTER IN EASTERN ERIE COUTNY...5 MILES ENE
             OF WATERFORD REPORTED DIME TO MARBLE SIZE HAIL...AND
             WIND GUSTS ESTIMATED AT 50 MPH.

WSO/ERIE

Local storm report, Jun 29, 4:54 PM EDT, 2 hours 27 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE ERIE, PA
454 PM EDT WED JUN 29 1994

ADDITIONAL STORM REPORTS FOR WEDNESDAY JUNE 29 1994

TIME  EDT    EVENT
.........................................................................
425 PM EDT   SKYWARN SPOTTER IN EASTERN ERIE COUTNY...3 MILES SE
             OF WATTSBURG REPORTED DIME TO PENNY SIZE HAIL...AND
             WIND GUSTS ESTIMATED AT 60 MPH.

432 PM EDT   SKYWARN SPOTTER IN THE TOWN OF CORRY...SOUTHEAST ERIE
             COUNTY...REPORTED UP TO MARBLE SIZE HAIL AND GUSTS TO
             55 MPH.

WSO/ERIE

Local storm report, Jun 29, 4:59 PM EDT, 2 hours 22 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE ERIE, PA
454 PM EDT WED JUN 29 1994

ADDITIONAL STORM REPORTS FOR WEDNESDAY JUNE 29 1994

TIME  EDT    EVENT
.........................................................................
425 PM EDT   SKYWARN SPOTTER IN EASTERN ERIE COUTNY...3 MILES SE
             OF WATTSBURG REPORTED DIME TO PENNY SIZE HAIL...AND
             WIND GUSTS ESTIMATED AT 60 MPH.

432 PM EDT   SKYWARN SPOTTER IN THE TOWN OF CORRY...SOUTHEAST ERIE
             COUNTY...REPORTED UP TO MARBLE SIZE HAIL AND GUSTS TO
             55 MPH.

WSO/ERIE

Special weather statement, Jun 29, 6:20 PM EDT, 1 hour 1 minute before

PAZ001>006-008-292315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ERIE, PA
620 PM EDT WED JUN 29 1994

...STRONG THUNDERSTORMS CONTINUING TO FORM ACROSS NORTHWEST PENNSYLVANIA
   EARLY THIS WEDNESDAY EVENING...

RADAR AT 620 PM SHOWED NUMEROUS THUNDERSTORMS...SOME STRONG IN INTENSITY
...SCATTERED THROUGHOUT ERIE...CRAWFORD...VENANGO...WARREN AND MCKEAN
COUNTIES.

THE STRONGEST THUNDERSTORMS WERE LOCATED JUST NORTHEAST OF LINESVILLE
...AND NORTHWEST OF CAMBRIDGE SPRINGS...IN CRAWFORD COUNTY.
ANOTHER STRONG THUNDERSTORM WAS ALSO LOCATED ABOUT 8 MILES NORTHWEST
OF YOUNGSVILLE IN WARREN COUNTY.

ELSEWHERE...STRONG THUNDERSTORMS WERE ALSO OCCURRING ACROSS CHAUTAUQUA
AND CATTARAUGUS COUNTIES OF WESTERN NEW YORK...AND ALSO OVER CUYAHOGA
AND PORTAGE COUNTIES IN EXTREME NORTHEAST OHIO.

MOVEMENT WAS TO THE NORTHEAST AT 30 MPH.

ANY OF THE THUNDERSTORMS WILL LIKELY PRODUCE DOWPOURS OF RAIN...HEAVY
ENOUGH TO CAUSE SOME FLOODING IN POOR DRAINAGE AREAS.  IN ADDITION...
THE STORMS WILL CONTAIN FREQUENT DEADLY CLOUD-TO-GROUND LIGHTNING...
GUSTY WINDS...AND POSSIBLE HAIL.

IF THREATENING WEATHER APPROACHES YOUR AREA...SEEK SHELTER INSIDE A
STURDY BUILDING AWAY FROM WINDOWS.

KEEP TUNED TO NOAA  WEATHER RADIO OR OTHER LOCAL RADIO AND TV STATIONS
THIS EVENING FOR FURTHER UPDATES.

LAMBERT/BELK

Special weather statement, Jun 29, 6:28 PM EDT, 53 minutes before

PAZ001>006-008-292315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ERIE, PA
620 PM EDT WED JUN 29 1994

...STRONG THUNDERSTORMS CONTINUING TO FORM ACROSS NORTHWEST PENNSYLVANIA
   EARLY THIS WEDNESDAY EVENING...

RADAR AT 620 PM SHOWED NUMEROUS THUNDERSTORMS...SOME STRONG IN INTENSITY
...SCATTERED THROUGHOUT ERIE...CRAWFORD...VENANGO...WARREN AND MCKEAN
COUNTIES.

THE STRONGEST THUNDERSTORMS WERE LOCATED JUST NORTHEAST OF LINESVILLE
...AND NORTHWEST OF CAMBRIDGE SPRINGS...IN CRAWFORD COUNTY.
ANOTHER STRONG THUNDERSTORM WAS ALSO LOCATED ABOUT 8 MILES NORTHWEST
OF YOUNGSVILLE IN WARREN COUNTY.

ELSEWHERE...STRONG THUNDERSTORMS WERE ALSO OCCURRING ACROSS CHAUTAUQUA
AND CATTARAUGUS COUNTIES OF WESTERN NEW YORK...AND ALSO OVER CUYAHOGA
AND PORTAGE COUNTIES IN EXTREME NORTHEAST OHIO.

MOVEMENT WAS TO THE NORTHEAST AT 30 MPH.

ANY OF THE THUNDERSTORMS WILL LIKELY PRODUCE DOWPOURS OF RAIN...HEAVY
ENOUGH TO CAUSE SOME FLOODING IN POOR DRAINAGE AREAS.  IN ADDITION...
THE STORMS WILL CONTAIN FREQUENT DEADLY CLOUD-TO-GROUND LIGHTNING...
GUSTY WINDS...AND POSSIBLE HAIL.

IF THREATENING WEATHER APPROACHES YOUR AREA...SEEK SHELTER INSIDE A
STURDY BUILDING AWAY FROM WINDOWS.

6KEEP TUNED TO NOAA  WEATHER RADIO OR OTHER LOCAL RADIO AND TV STATIONS
THIS EVENING FOR FURTHER UPDATES.

LAMBERT/BELK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 2:49 AM EDT	Severe Thunderstorm Warning	CLE	Crawford	56 min
Jun 29, 4:05 PM EDT	Severe Thunderstorm Warning	CLE	Erie	55 min
Jun 29, 7:17 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	58 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1994 Every severe thunderstorm warning in 1994

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.