Alert archive / Pennsylvania / Tornado Warnings in 2007

Tornado Warning 6, NWS Cleveland, OH

May 1, 2007Crawford County, Pennsylvania

NWS Cleveland, OH issued this tornado warning at May 1, 2007, 5:50 PM EDT for Crawford County, Pennsylvania. It was in force for 40 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 1, 2007, 5:50 PM EDT (21:50 UTC)
Expired: May 1, 2007, 6:30 PM EDT
In force: 40 min
Issued by: NWS Cleveland, OH
Area: Counties, with a storm outline in the text

County Crawford County, PA

The radar

The Pittsburgh radar (KPBZ), 125 km from the middle of the area, began a volume at 21:52 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
May 1, 6:00 PM EDT	TSTM WND DMG	1 S Meadville, PA	TREE ON HOUSE
May 1, 6:05 PM EDT	TSTM WND DMG	5 Se Meadville, PA	OVER 100 TREES DOWN IN TAMAROCK LAKE AREA, SOME TREES FELL ON HOUSES.
May 1, 6:05 PM EDT	TORNADO	Meadville, PA	EF1 WIDTH 25-30 YARDS AND AN INTERMITTENT PATH OF 1.5 TO 2 MILES LONG. THE TORNADO PATH WAS FROM EAST OF MEADVILLE TO TAMARACK LAKE.
May 1, 6:10 PM EDT	TSTM WND DMG	Linesville, PA	SEVERAL TREES DOWN.
May 1, 6:20 PM EDT	TSTM WND DMG	Meadville, PA	HANGAR ROOF DAMAGED AND CONCRETE WALL BLOWN OUT OF A BUILDING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 1, 4:22 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.8 hours before the alert went out and 139 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1863 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 249 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.

000 
WFUS51 KCLE 012150
TORCLE
PAC039-012230-
/O.NEW.KCLE.TO.W.0006.070501T2150Z-070501T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
550 PM EDT TUE MAY 1 2007

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* TORNADO WARNING FOR...
  CRAWFORD COUNTY IN NORTHWEST PENNSYLVANIA...

* UNTIL 630 PM EDT

* AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  LINESVILLE...OR ABOUT 10 MILES WEST OF MEADVILLE...MOVING EAST AT
  35 MPH.

* THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE
  INDICATED COUNTY.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
TUESDAY EVENING FOR NORTHEASTERN OHIO.

LAT...LON 4176 8040 4159 8045 4149 7994 4168 7975

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 5:47 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	58 min
May 1, 6:26 PM EDT	Severe Thunderstorm Warning	CLE	Erie	64 min
May 1, 6:31 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	44 min
May 1, 7:56 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	64 min

Nearby

Tornado Warnings in Pennsylvania, 2007 Every tornado warning in 2007 Tornadoes in 2007

Sources

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