Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 38, NWS Cleveland, OH

April 29, 1991Crawford County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Apr 29, 1991, 12:20 AM EDT for Crawford County, Pennsylvania. It was in force for 55 min. 2 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: Apr 29, 1991, 12:20 AM EDT (04:20 UTC)
Expired: Apr 29, 1991, 1:15 AM EDT
In force: 55 min
Issued by: NWS Cleveland, OH
Area: Whole counties

County Crawford County, PA

What was reported inside it

Time	Report	Where	Remark
Apr 29, 12:30 AM EDT	Hail 0.75	Crawford, PA
Apr 29, 12:45 AM EDT	Hail 0.75	Crawford, 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 4.3 hours before the alert went out and 180 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: 3 J/kg
Mixed-layer CIN: -376 J/kg
Mixed-layer LCL: 1161 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 142 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, Apr 28, 6:46 PM EDT, 5 hours 34 minutes before

OHZ002-003-004-282345-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OHIO
646 PM EDT SUN APR 28 1991

AN AREA OF SLOW MOVING THUNDERSTORM CONTINUE TO DEVELOP OVER
NORTHEASTERN OHIO.

AT 640 PM EDT AN AREA OF INTENSE SLOW MOVING THUNDERSTORMS WERE OVER
EASTERN CUYAHOGA... NORTHERN SUMMIT AND EASTERN GEAUGA COUNTIES.

CONTINUED HEAVY DOWNPOURS CAN BE EXPECTED WITH THESE STORMS AS THEY
MOVE OVER GEAUGA COUNTY.

MOTORISTS SHOULD USE EXTRA CAUTION WHERE DRAINAGE IS POOR AND PONDING
OF WATER MAY OCCUR. THESE STORMS MAY PRODUCE DANGEROUS LIGHTNING AND
GUSTY WINDS.

JOHNSON

Special weather statement, Apr 28, 7:24 PM EDT, 4 hours 56 minutes before

OHZ002-003-290025-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OHIO
725 PM EDT SUN APR 28 1991

A CLUSTER OF THUNDERSTORMS CONTINUE TO MOVE VERY SLOWLY NORTHEAST
ACROSS GEAUGA COUNTY THIS EVENING.

AT 715 PM EDT AN INTENSE SLOW MOVING THUNDERSTORM WAS BETWEEN SOLON AND
BAINBRIDGE MOVING NORTHEAST AT AROUND 5 MPH. AT 705 PM EDT A SKYWARN
OBSERVER ESTIMATED ONE-QUARTER TO ONE-HALF INCH OF RAINFALL IN FIFTEEN
MINUTES IN SOLON.

CONTINUED HEAVY DOWNPOURS CAN BE EXPECTED WITH THESE STORMS AS THEY MOVE
OVER GEAUGA AND LAKE COUNTIES.

MOTORISTS SHOULD USE EXTRA CAUTION WHERE DRAINAGE IS POOR AND PONDING
OF WATER MAY OCCUR. THIS STORM MAY PRODUCE DANGEROUS LIGHTNING...
GUSTY WINDS AND SMALL HAIL.

JOHNSON

Special weather statement, Apr 28, 8:24 PM EDT, 3 hours 56 minutes before

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Special weather statement, Apr 28, 10:26 PM EDT, 1 hour 54 minutes before

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Special weather statement, Apr 28, 10:34 PM EDT, 1 hour 46 minutes before

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Special weather statement, Apr 28, 11:50 PM EDT, 30 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 8:20 PM EDT	Flash Flood Warning	CLE	McKean	3 hr

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.