Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 189, NWS Cleveland, OH

July 6, 1994McKean County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jul 6, 1994, 3:39 PM EDT for McKean County, Pennsylvania. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Jul 6, 1994, 3:39 PM EDT (19:39 UTC)
Expired
Jul 6, 1994, 4:45 PM EDT
In force
66 min
Issued by
NWS Cleveland, OH
Area
Whole counties

County McKean County, PA

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.7 hours before the alert went out and 125 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 12:00Z on 1994-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 362 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 12:00Z on 1994-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
362 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
1159 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

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, Jul 6, 2:39 PM EDT, 1 hour before
OHZ001>009-015>019-051935-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
239 PM EDT TUE JUL 5 1994

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF NORTHWESTERN OHIO
UNTIL 8 PM EDT.

SOME CITIES IN THE WATCH AREA INCLUDE TOLEDO AND DEFIANCE.

AT 239 PM EDT CLEVELAND DOPPLER RADAR INDICATED NO PRECIPITATION IN THE
WATCH AREA. HOWEVER...SCATTERED THUNDERSTORMS WERE LOCATED OVER SOUTHERN
OHIO. THE STORMS WAS MOVING TO THE NORTHWEST AT 15 MILES AN HOUR.

THE AIRMASS ACROSS NORTHWEST OHIO IS VERY MOIST AND UNSTABLE...AND THERE
IS A GOOD CHANCE THAT SEVERE THUNDERSTORMS COULD DEVELOP ACROSS THE
WATCH AREA THIS AFTERNOON AND EVENING.

PEOPLE IN AND CLOSE TO THE WATCH AREA SHOULD KEEP UP TO DATE ON THE
LATEST WEATHER INFORMATION...AND BE PREPARED TO MOVE TO SAFETY SHOULD
THREATENING WEATHER APPROACH OR A WARNING BE ISSUED.

HOVIS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 9:53 AM EDTSevere Thunderstorm WarningCLEErie, Lorain24 min
Jul 6, 4:25 PM EDTSevere Thunderstorm WarningCLEAshtabula35 min
Jul 6, 3:44 PM EDTSevere Thunderstorm WarningCLEVenango61 min
Jul 6, 4:10 PM EDTFlash Flood WarningCLEMcKean, Potter2 hr
Jul 6, 4:32 PM EDTSevere Thunderstorm WarningCLECrawford58 min
Jul 6, 4:53 PM EDTSevere Thunderstorm WarningCLEWarren67 min
Jul 6, 5:24 PM EDTSevere Thunderstorm WarningCLEForest, Venango66 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1994Every 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.