Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 9, NWS Cleveland, OH

April 16, 1993Cameron County, Potter County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Apr 16, 1993, 3:39 AM EDT for Cameron County, Potter County, Pennsylvania. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Apr 16, 1993, 3:39 AM EDT (07:39 UTC)
Expired
Apr 16, 1993, 4:45 AM EDT
In force
66 min
Issued by
NWS Cleveland, OH
Area
Whole counties

Counties Cameron County, PA, Potter County, PA

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 7.7 hours before the alert went out and 158 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, Buffalo Intl Airport, NY at 00:00Z on 1993-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 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, Buffalo Intl Airport, NY at 00:00Z on 1993-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 155 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
17 J/kg
Mixed-layer CIN
-186 J/kg
Mixed-layer LCL
2592 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
155 m²/s²
0-3 km storm-relative helicity
188 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 
TTAA00 KERI 160750 COR
SVRERI
PAC023-105-160845-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED FOR TIME IN 3RD PARAGRAPH
NATIONAL WEATHER SERVICE ERIE PA
339 AM EDT FRI APR 16 1993

THE NATIONAL WEATHER SERVICE IN ERIE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  445 AM EDT
FOR THE FOLLOWING LOCATIONS...

IN NORTHWEST PENNSYLVANIA

   ...CAMERON COUNTY...POTTER COUNTY

WEATHER RADAR FROM ERIE AT 335 AM SHOWED A LINE OF SEVERE THUNDERSTORMS
LOCATED FROM JUST WEST OF ELDRED IN MCKEAN COUNTY...SOUTH TO NEAR
WEEDVILE IN ELK COUNTY.

THIS LINE OF STORMS IS MOVING RAPIDLY TO THE EAST AT 50 MPH.
THE STORMS WILL MOVE THROUGH CAMERON AND WESTERN POTTER COUNTY BY
415 AM AND THROUGH EASTERN POTTER COUNTY...AND THE TOWN OF GALETON
BY 430 AM.

THERE HAVE BEEN SEVERAL REPORTS OF WIND GUSTS OF 60 MPH ALONG WITH UP TO
THREE-QUARTERS OF AN INCH OF RAIN IN A 15-MINUTE TIME PERIOD AS THE LINE
OF STORMS MOVED THROUGH WESTERN PORTIONS OF MCKEAN AND ELK COUNTIES
WITHIN THE PAST HOUR.


SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FL@OOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.




&

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

Special weather statement, Apr 15, 10:09 PM EDT, 5 hours 30 minutes before
OHZALL-160400-

SPECIAL WEATHER STATEMENT AND EVENING OHIO WEATHER STORY
NATIONAL WEATHER SERVICE CLEVELAND OH
1005 PM EDT THU APR 15 1993

...THE TORNADO WATCH FOR PORTIONS OF WESTERN OHIO THIS EVENING HAS BEEN
CANCELLED...

...A FLOOD WATCH WAS IN EFFECT FOR THE SOUTHWEST QUARTER OF OHIO
OVERNIGHT...

STORMY WEATHER AFFECTED THE WESTERN THIRD OF OHIO EARLY THIS EVENING
PROMPTING A TORNADO WATCH TO BE ISSUED. AT 10PM THE TORNADO WATCH FOR
PORTIONS OF SOUTHWEST OHIO WAS CANCELLED.

AFTER RECORD-BREAKING WARMTH PUSHED INTO OHIO TODAY BEHIND A WARM FRONT
STRONG AND ISOLATED SEVERE THUNDERSTORMS BROKE OUT AHEAD OF A COLD FRONT
EARLIER THIS EVENING. SOME OF THESE SEVERE STORMS PRODUCED LARGE HAIL
AND DAMAGING WINDS...CAUSING DOWNED TREES AND POWER LINES IN SOUTHWEST
OHIO...SPECIFICALLY BUTLER AND HAMILTON COUNTIES.

SOME OF THE STORMS HAD PRODUCED LOCALIZED RAINFALL IN THE ONE TO 2 INCH
RANGE...CAUSING SOME FLASH FLOODING ALSO IN BUTLER COUNTY. WITH RAIN
COVERING MUCH OF THE SOUTHWEST...ADDITIONAL RAINFALL UP TO AN INCH IS
POSSIBLE OVERNIGHT. WITH THE GROUND SATURATED AND THE RAIN CAUSING
RUNOFF...MINOR FLOODING WILL BE POSSIBLE IN THE SOUTHWEST QUARTER OF THE
STATE UNTIL THE RAIN ENDS WITH THE PASSAGE OF A COLD FRONT EARLY FRIDAY.

AS A RESULT OF THESE STORMS A FLOOD WATCH WAS IN EFFECT FOR THE
SOUTHWEST QUARTER OF THE STATE TIL FRIDAY MORNING.

RECORDS HIGHS WERE TIED AT YOUNGSTOWN AND AKRON-CANTON THIS AFTERNOON...
AKRON-CANTON AT 79 DEGREES AND YOUNGSTOWN AT 81 DEGREE. OLD RECORDS FOR
BOTH LOCATIONS WERE SET IN 1976.

THE MOVEMENT OF THE COLD FRONT WILL CONTINUE TO INFLUENCE THE OHIO
WEATHER FOR THE NEXT COUPLE OF DAYS. BRISK WINDS AHEAD OF THE FRONT WILL
PRECEDE AND THEN ACCOMPANY SOME SHOWERS AND THUNDERSTORMS TONIGHT.

THE FRONT WILL MOVE THROUGH MOST OF THE WESTERN HALF OF OHIO BY DAYBREAK
AND SHOWERS AND THUNDERSTORMS WILL BE QUITE NUMEROUS WITH IT. SOME OF
THEM COULD BE ACCOMPANIED BY HIGH WINDS...HAIL OR HEAVY RAINS IN
SOUTHERN OHIO. TEMPERATURES WILL DIP DOWN INTO THE 40'S IN WESTERN OHIO
AND THE MID 50'S IN EASTERN OHIO OVERNIGHT.

THE COLDER WEATHER WILL STAY AROUND FOR THE WEEKEND WITH HIGHS ONLY
EXPECTED TO REACH THE 40'S TO LOWER 50'S.

ON THE EVENING WEATHER MAP...A STRONG LOW PRESSURE AREA CENTERED OVER
SOUTHERN LAKE MICHIGAN EXTENDED A WARM FRONT ACROSS SOUTHERN MICHIGAN
THEN CURVED DOWN ACROSS PENNSYLVANIA. A COLD FRONT CURVED SOUTH FROM THE
LOW ACROSS TENNESSEE AND ALABAMA.

THE LOW WILL TRACK NORTH INTO MICHIGAN BY FRIDAY MORNING. THE WARM
FRONT WILL CONTINUE TO PUSH NORTH TOWARD NEW ENGLAND WHILE THE COLD
FRONT CROSSES OHIO AND REACHES THE MID ATLANTIC COAST BY FRIDAY EVENING.
A TROUGH OF LOW PRESSURE WILL FOLLOW THE FRONT ACROSS OHIO FRIDAY NIGHT.
WEAK HIGH PRESSURE WILL THEN BUILD INTO OHIO FROM THE SOUTHWEST DURING
SATURDAY.

SEM
Special weather statement, Apr 16, 12:40 AM EDT, 2 hours 59 minutes before
OHZ002-003-160730-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
1240 AM EDT FRI APR 16 1993

LOCALLY HEAVY RAIN AND GUSTY WINDS WERE AFFECTING THE LAKESHORE COUNTIES
AND NORTH CENTRAL OHIO EARLY FRIDAY MORNING.

AT 1230 AM EDT...RADAR SHOWED A LARGE AREA OF RAIN WITH EMBEDDED
THUNDERSTORMS OVER MOST OF EASTERN OHIO. THUNDERSTORMS WITH HEAVY RAIN
WERE LOCATED OVER THE EASTERN SUBURBS OF CLEVELAND AND NEAR GENEVA IN
ASHTABULA COUNTY. THE STORMS WERE MOVING NORTHEAST AROUND 40 MPH.

HEAVY RAIN AND WIND GUSTS UP TO 50 MPH WILL OCCUR WITH THE
THUNDERSTORMS. SOME STREET FLOODING IS LIKELY DUE TO THE HEAVY RAIN AND
SOME SMALL CREEKS MAY OVERFLOW.

THE RAIN AREA WAS MOVING RAPIDLY NORTHEAST AND SHOULD END OVER NORTH
CENTRAL OHIO AND THE CENTRAL LAKESHORE COUNTIES BY 2 AM AND OVER THE
EAST LAKESHORE BY 330 AM EDT. BOATERS ON LAKE ERIE SHOULD SEEK SAFE
HARBOR UNTIL THE STORMS PASS. LISTEN TO NOAA WEATHER RADIO FOR UPDATES.

GABRIC

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 12:45 AM EDTSevere Thunderstorm WarningCLELawrence45 min
Apr 16, 12:58 AM EDTSevere Thunderstorm WarningCLEMercer47 min
Apr 16, 1:24 AM EDTSevere Thunderstorm WarningCLEButler, Crawford, Venango66 min
Apr 16, 1:45 AM EDTSevere Thunderstorm WarningCLEErie45 min
Apr 16, 2:15 AM EDTSevere Thunderstorm WarningCLEWarren45 min
Apr 16, 2:46 AM EDTSevere Thunderstorm WarningCLEElk, McKean44 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1993Every severe thunderstorm warning in 1993

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.