Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 101, NWS Pittsburgh, PA

July 10, 2001Allegheny County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 10, 2001, 2:28 PM EDT for Allegheny County, Pennsylvania. It was in force for 47 min. 1 report 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 10, 2001, 2:28 PM EDT (18:28 UTC)
Expired: Jul 10, 2001, 3:15 PM EDT
In force: 47 min
Issued by: NWS Pittsburgh, PA
Area: Whole counties

County Allegheny County, PA

The radar

The Pittsburgh radar (KPBZ), 21 km from the middle of the area, began a volume at 18:31 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
Jul 10, 2:45 PM EDT	Thunderstorm Wind	Liberty, PA	Thunderstorm winds downed numerous trees in the Liberty and Glassport areas. Several homes and one parked boat were damaged in Liberty from falling trees. On Elizabeth Street in Liberty, a children's playground and pavilion were damaged. In nearby McKeesport

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

Pittsburgh, PA (KPIT), launched 12:00Z, 6.5 hours before the alert went out and 12 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: 633 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 1057 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPBZ 101828
SVRPBZ

PAC003-101915-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
228 PM EDT TUE JUL 10 2001

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALLEGHENY COUNTY IN PENNSYLVANIA

* UNTIL 315 PM EDT

* AT 228 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WEST MIFFLIN...MOVING EAST AT 20 MPH.

* SOME LOCATIONS THAT WILL BE AFFECTED BY THIS STORM INCLUDE...
   WILMERDING...RANKIN...  LINCOLN...LIBERTY...ELIZABETH...EAST
   PITTSBURGH...EAST   MCKEESPORT...DRAVOSBURG AND BRADDOCK HILLS...

<<CALL TO ACTION>>SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 58
MILES AN HOUR AND LARGE HAIL GREATER THAN THREE QUARTERS OF AN INCH.

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.

NWS Pittsburgh, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 10, 9:00 AM EDT, 5 hours 28 minutes earlier.

Area forecast discussion, Jul 10, 9:00 AM EDT, 5 hours 28 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
900 AM EDT TUE JUL 10 2001

ISSUED MID MORNING UPDATE TO DROP MENTION OF MORNING FOG AND BEEF
WORDING FOR THUNDERSTORMS THIS AFTERNOON fAND TONIGHT. REST UNCHANGED.
...GIORDANO

.PBZ...
MD...NONE.
OH...NONE.
PA...NONE.
WV...NONE.

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 2:45 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	60 min
Jul 10, 3:06 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	24 min
Jul 10, 3:24 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	66 min
Jul 10, 3:34 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	41 min
Jul 10, 4:26 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	34 min
Jul 10, 5:01 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Washington	59 min
Jul 10, 5:40 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	65 min
Jul 10, 5:44 PM EDT	Flash Flood Warning	PBZ	Washington	3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2001 Every severe thunderstorm warning in 2001

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.