Alert archive / Pennsylvania / Tornado Warnings in 2009

Tornado Warning 7, NWS Cleveland, OH

July 11, 2009Crawford County, Pennsylvania

NWS Cleveland, OH issued this tornado warning at Jul 11, 2009, 5:44 PM EDT for Crawford County, Pennsylvania. It was in force for 19 min. 1 report 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: Jul 11, 2009, 5:44 PM EDT (21:44 UTC)
Expired: Jul 11, 2009, 6:03 PM EDT
In force: 19 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon

County Crawford County, PA

The radar

The Pittsburgh radar (KPBZ), 132 km from the middle of the area, began a volume at 21:47 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 11, 5:45 PM EDT	TSTM WND DMG	2 N Titusville, PA	A FEW TREES DOWN.

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.7 hours before the alert went out and 142 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: 1949 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

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

000 
WFUS51 KCLE 112144
TORCLE
PAC039-112215-
/O.NEW.KCLE.TO.W.0007.090711T2144Z-090711T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
544 PM EDT SAT JUL 11 2009

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

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

* UNTIL 615 PM EDT

* AT 543 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR TITUSVILLE...OR 17 MILES NORTH OF OIL   
CITY...AND MOVING EAST AT 35 MPH. POSSIBLE BRIEF TORNADO TOUCHDOWN 
IN BLOOMING VALLEY.

* 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 4162 7981
      4174 7980 4175 7960
TIME...MOT...LOC 2144Z 270DEG 31KT 4167 7969

$$

MULLEN

1 follow-up statement

000 
WWUS51 KCLE 112203
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
603 PM EDT SAT JUL 11 2009

PAC039-112213-
/O.CAN.KCLE.TO.W.0007.000000T0000Z-090711T2215Z/
CRAWFORD PA-
603 PM EDT SAT JUL 11 2009

...THE TORNADO WARNING FOR EASTERN CRAWFORD COUNTY IN NORTHWEST
PENNSYLVANIA IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 4162 7960 4161 7962 4161 7981 4162 7981
      4174 7980 4175 7960
TIME...MOT...LOC 2203Z 270DEG 31KT 4167 7947

$$

WILLARD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 11:41 AM EDT	Areal Flood Advisory	CLE	Crawford, Erie	3 hr
Jul 11, 5:10 PM EDT	Severe Thunderstorm Warning	CLE	Erie	16 min
Jul 11, 5:26 PM EDT	Severe Thunderstorm Warning	CLE	Crawford	34 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.