Alert archive / Pennsylvania / Tornado Warnings in 2004

Tornado Warning 4, NWS Pittsburgh, PA

July 4, 2004Jefferson County, Pennsylvania

NWS Pittsburgh, PA issued this tornado warning at Jul 4, 2004, 6:01 PM EDT for Jefferson County, Pennsylvania. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 4, 2004, 6:01 PM EDT (22:01 UTC)
Expired: Jul 4, 2004, 6:30 PM EDT
In force: 29 min
Issued by: NWS Pittsburgh, PA
Area: Counties, with a storm outline in the text

County Jefferson County, PA

The radar

The State College radar (KCCX), 66 km from the middle of the area, began a volume at 22:03 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 10.0 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: 509 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1039 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WFUS51 KPBZ 042201
TORPBZ
PAC065-042230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
601 PM EDT SUN JUL 4 2004

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

* TORNADO WARNING FOR...
  JEFFERSON COUNTY IN PENNSYLVANIA

* UNTIL 630 PM EDT

* AT 554 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES SOUTH OF
  BROCKWAY...AND MOVING NORTHEAST AT 25 MPH.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. EVACUATE MOBILE HOMES AND
GET INSIDE A SUBSTANTIAL SHELTER.

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4123 7889 4109 7874 4142 7815 4159 7834

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 4:24 PM EDT	Severe Thunderstorm Warning	PBZ	Clarion	66 min
Jul 4, 4:38 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong	67 min
Jul 4, 4:57 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	63 min
Jul 4, 5:34 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	56 min
Jul 4, 5:51 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	54 min

Nearby

Tornado Warnings in Pennsylvania, 2004 Every tornado warning in 2004 Tornadoes in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.