Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 97, NWS Cleveland, OH

July 18, 1986McKean County, Warren County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jul 18, 1986, 10:04 PM EDT for McKean County, Warren County, Pennsylvania. It was in force for 86 min. 4 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: Jul 18, 1986, 10:04 PM EDT (02:04 UTC)
Expired: Jul 18, 1986, 11:30 PM EDT
In force: 86 min
Issued by: NWS Cleveland, OH
Area: Whole counties

Counties McKean County, PA, Warren County, PA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where
Jul 18, 10:30 PM EDT	Thunderstorm Wind 0	Warren, PA
Jul 18, 10:45 PM EDT	Thunderstorm Wind 0	Warren, PA
Jul 18, 10:45 PM EDT	Thunderstorm Wind 0	Mckean, PA
Jul 18, 11:00 PM EDT	Thunderstorm Wind 0	Warren, 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, 2.1 hours before the alert went out and 126 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: 698 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1256 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KERI 190204
SVRERI
PAC083-123-190330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ERIE PA
1004 PM EDT FRI JUL 18 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1130 PM EDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

NORTHWEST PENNSYLVANIA...MCKEAN AND WARREN

AT 10 PM ERIE WEATHER RADAR SHOWED SEVERE THUNDERSTORMS IN
SOUTHWEST NEW YORK STATE..MOVING TO THE SOUTHEAST AT 40 MILES
AN HOUR..TOWARD WARREN AND MCKEAN COUNTIES.

 THIS STORM IS ACCOMPANIED BY INTENSE LIGHTNING AND STRONG GUSTY
 WINDS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 9:46 PM EDT	Flash Flood Warning	CLE	McKean	2 hr
Jul 18, 11:44 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie	76 min
Jul 19, 12:02 AM EDT	Severe Thunderstorm Warning	CLE	Warren	58 min
Jul 19, 1:12 AM EDT	Flash Flood Warning	CLE	Warren	3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1986 Every severe thunderstorm warning in 1986

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.