Alert archive / Pennsylvania / Tornado Warnings in 2009

Tornado Warning 8, NWS Cleveland, OH

August 10, 2009Crawford County, Pennsylvania

NWS Cleveland, OH issued this tornado warning at Aug 10, 2009, 4:43 PM EDT for Crawford County, Pennsylvania. It was in force for 47 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: Aug 10, 2009, 4:43 PM EDT (20:43 UTC)
Expired: Aug 10, 2009, 5:30 PM EDT
In force: 47 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon

County Crawford County, PA

The radar

The Pittsburgh radar (KPBZ), 123 km from the middle of the area, began a volume at 20:43 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 watch it was issued in

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

Issued	Product	Office	Lasted
Aug 10, 3:13 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 8.7 hours before the alert went out and 134 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: 1328 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 696 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
WFUS51 KCLE 102043
TORCLE
PAC039-102130-
/O.NEW.KCLE.TO.W.0008.090810T2043Z-090810T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
443 PM EDT MON AUG 10 2009

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

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

* UNTIL 530 PM EDT

* AT 443 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 5 MILES SOUTHEAST OF MEADVILLE...AND MOVING EAST
  AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  TITUSVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. IF NO
BASEMENT IS AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR CLOSET.

&&

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 4162 7960 4161 7962 4161 7981 4158 7986
      4149 7999 4150 8021 4168 8020 4169 7960
TIME...MOT...LOC 2043Z 273DEG 27KT 4159 8009

$$
ASTIFAN

1 follow-up statement

000 
WWUS51 KCLE 102122
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
522 PM EDT MON AUG 10 2009

PAC039-102130-
/O.CON.KCLE.TO.W.0008.000000T0000Z-090810T2130Z/
CRAWFORD PA-
522 PM EDT MON AUG 10 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR SOUTHERN
CRAWFORD COUNTY IN NORTHWEST PENNSYLVANIA...

AT 520 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO. THIS TORNADO WAS LOCATED NEAR TITUSVILLE...OR 10
MILES NORTH OF OIL CITY...MOVING EAST AT 30 MPH.

LOCATIONS NEAR THE PATH OF THE TORNADO INCLUDE....

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. OTHERWISE...SEEK
SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR HALLWAY OR
ROOM SUCH AS A CLOSET.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
MONDAY EVENING FOR NORTHEASTERN OHIO AND NORTHWEST PENNSYLVANIA.

&&

LAT...LON 4162 7960 4161 7962 4161 7981 4158 7986
      4149 7999 4150 8021 4168 8020 4169 7960
TIME...MOT...LOC 2122Z 273DEG 27KT 4157 7970

$$

FITZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 6:28 AM EDT	Areal Flood Advisory	CLE	Erie	3 hr
Aug 10, 2:32 PM EDT	Flash Flood Warning	CLE	Erie	3 hr
Aug 10, 2:38 PM EDT	Severe Thunderstorm Warning	CLE	Erie	67 min
Aug 10, 3:37 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	53 min
Aug 10, 4:01 PM EDT	Areal Flood Advisory	CLE	Crawford	6 hr
Aug 10, 4:24 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	66 min
Aug 10, 4:32 PM EDT	Flash Flood Warning	CLE	Crawford	2 hr

Nearby

Tornado Warnings in Pennsylvania, 2009 Every tornado warning in 2009 Tornadoes in 2009

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.