Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 5, NWS Cleveland, OH

March 2, 1991Lawrence County, Mercer County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Mar 2, 1991, 3:19 PM EST for Lawrence County, Mercer County, Pennsylvania. It was in force for 41 min.

The area

The counties it named.

The facts

Issued
Mar 2, 1991, 3:19 PM EST (20:19 UTC)
Expired
Mar 2, 1991, 4:00 PM EST
In force
41 min
Issued by
NWS Cleveland, OH
Area
Whole counties

Counties Lawrence County, PA, Mercer County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 8.3 hours before the alert went out and 84 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 1991-03-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 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 1991-03-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 square meters per square second.1939587897117Sfc1 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
9 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
670 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
197 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.

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, Mar 2, 10:38 AM EST, 4 hours 41 minutes before
OHZALL-030830-

SEVERE WEATHER OUTLOOK FOR OHIO
NATIONAL WEATHER SERVICE CLEVELAND OH
1040 AM EST SAT MAR 2 1991

THE NATIONAL SEVERE STORMS FORECAST CENTER IN KANSAS CITY SAYS THAT
THERE IS A SLIGHT RISK$ OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
TONIGHT OVER ALL OF OHIO.

VRCEK

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 2, 2:24 PM ESTSevere Thunderstorm WarningCLEStark36 min
Mar 2, 2:37 PM ESTSevere Thunderstorm WarningCLEPortage53 min
Mar 2, 2:49 PM ESTSevere Thunderstorm WarningCLEColumbiana, Mahoning, Trumbull56 min
Mar 2, 2:57 PM ESTSevere Thunderstorm WarningCLEAshtabula48 min
Mar 2, 6:12 PM ESTSevere Thunderstorm WarningCLEMcKean, Potter63 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1991Every severe thunderstorm warning in 1991

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.