Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 13, NWS Cleveland, OH

June 10, 1999Erie County, Pennsylvania

NWS Cleveland, OH issued this severe thunderstorm warning at Jun 10, 1999, 5:13 PM EDT for Erie County, Pennsylvania. It was in force for 62 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: Jun 10, 1999, 5:13 PM EDT (21:13 UTC)
Expired: Jun 10, 1999, 6:15 PM EDT
In force: 62 min
Issued by: NWS Cleveland, OH
Area: Whole counties

County Erie County, PA

The radar

The Buffalo radar (KBUF), 145 km from the middle of the area, began a volume at 21:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 10, 5:30 PM EDT	Thunderstorm Wind	Corry, PA	Many large trees down and widepread power outages.
Jun 10, 5:35 PM EDT	Hail 0.75	Waterford, 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.2 hours before the alert went out and 146 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: 21 J/kg
Mixed-layer CIN: -179 J/kg
Mixed-layer LCL: 1546 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

971 
WUUS1 KCLE 102115 RRA
SVRCLE
PAC049-102215-

BULLETIN - EAS ACTIVATION/IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
513 PM EDT THU JUN 10 1999

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ERIE COUNTY PA IN NORTHWESTERN PENNSYLVANIA

* UNTIL 615 PM EDT

* AT 512 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 15 MILES SOUTH OF ERIE PA OR 12 MILES SOUTHEAST
  OF KEARSARGE... MOVING SOUTH AT 5 MPH.

THE SEVERE THUNDERSTORM WILL MOVE NEAR...THE CITIES CORRY AND
UNION CITY.


SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL. GO INSIDE
A STURDY BUILDING AND STAY AWAY FROM WINDOWS.
$$
END/COMEAUX

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 4:11 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	34 min
Jun 10, 4:43 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	47 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 1999 Every severe thunderstorm warning in 1999

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; radar from the NEXRAD Level II archive.