Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 69, NWS Cleveland, OH

June 11, 1991McKean County, Potter County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jun 11, 1991, 2:39 PM EDT for McKean County, Potter County, Pennsylvania. It was in force for 66 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 11, 1991, 2:39 PM EDT (18:39 UTC)
Expired: Jun 11, 1991, 3:45 PM EDT
In force: 66 min
Issued by: NWS Cleveland, OH
Area: Whole counties

Counties McKean County, PA, Potter County, PA

What was reported inside it

Time	Report	Where
Jun 11, 2:50 PM EDT	Thunderstorm Wind 0	Mckean, PA
Jun 11, 2:55 PM EDT	Thunderstorm Wind 0	Mckean, PA
Jun 11, 3:00 PM EDT	Thunderstorm Wind 0	Potter, PA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 6.7 hours before the alert went out and 218 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: 106 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1304 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 109 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, Jun 11, 1:00 PM EDT, 1 hour 39 minutes before

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Special weather statement, Jun 11, 1:50 PM EDT, 49 minutes before

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Special weather statement, Jun 11, 2:26 PM EDT, 13 minutes before

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Special weather statement, Jun 11, 2:26 PM EDT, 13 minutes before

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Special weather statement, Jun 11, 2:27 PM EDT, 12 minutes before

OHZ004-PAZ003-112100-

SPECIAL WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
227 PM EDT TUE JUN 11 1991

STRONG THUNDERSTORMS WERE MOVING ACROSS NORTHEAST OHIO THIS
AFTERNOON.

AT 220 PM WEATHER SERVICE RADAR INDICATED STRONG THUNDERSTORMS
EXTENDING FROM JUST NORTH OF THE YOUNGSTOWN AIRPORT TO AKRON. THESE
STORMS WERE MOVING EAST AT 25 MPH .

THESE STORMS CAN PRODUCE HEAVY RAIN...FREQUENT LIGHTNING...GUSTY WINDS
AND SM9ALL HAIL. PEOPLE IN THE PATH OF THESE STORMS SHOULD BE PREPARED TO
TAKE ACTION. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR FURTHER
UPDATES.

SLA ...CORRECTED SPELLING...

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 5:18 PM EDT	Severe Thunderstorm Warning	CLE	Columbiana	27 min
Jun 11, 5:49 PM EDT	Severe Thunderstorm Warning	CLE	Columbiana	34 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1991 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.