Alert archive / Pennsylvania / Tornado Warnings in 2009

Tornado Warning 9, NWS Philadelphia/Mount Holly

July 29, 2009Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this tornado warning at Jul 29, 2009, 2:11 PM EDT for Carbon County, Monroe County, Pennsylvania. It was in force for 34 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 29, 2009, 2:11 PM EDT (18:11 UTC)
Expired: Jul 29, 2009, 2:45 PM EDT
In force: 34 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Carbon County, PA, Monroe County, PA

The radar

The Binghamton radar (KBGM), 137 km from the middle of the area, began a volume at 18:13 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
Jul 29, 12:49 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.2 hours before the alert went out and 197 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: 1577 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 745 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

000 
WFUS51 KPHI 291811
TORPHI
PAC025-089-291845-
/O.NEW.KPHI.TO.W.0009.090729T1811Z-090729T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
211 PM EDT WED JUL 29 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 245 PM EDT

* AT 211 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  BRODHEADSVILLE...OR 11 MILES SOUTH OF MOUNT POCONO...MOVING
  NORTHEAST AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  REEDERS AND STORMVILLE BY 220 PM EDT...
  SCOTRUN BY 225 PM EDT...
  ANALOMINK...HERNYVILLE...PARADISE VALLEY AND EAST STROUDSBURG BY
  230 PM EDT...
  ALPINE MOUNTAIN BY 235 PM EDT...
  ECHO LAKE BY 240 PM EDT...

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. 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 800 PM EDT
WEDNESDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN
PENNSYLVANIA.

&&

LAT...LON 4121 7518 4118 7515 4116 7516 4116 7513
      4115 7512 4107 7504 4084 7541 4098 7556
TIME...MOT...LOC 1811Z 232DEG 30KT 4097 7539

$$

EBERWINE

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 10:15 AM EDT	Flash Flood Watch	PHI	Berks, Delaware, Lehigh, Northampton, Philadelphia	17 hr
Jul 29, 11:48 AM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Montgomery	72 min
Jul 29, 12:12 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	78 min
Jul 29, 1:51 PM EDT	Flash Flood Warning	PHI	Carbon, Monroe	9 hr
Jul 29, 1:56 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	64 min
Jul 29, 2:04 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	56 min
Jul 29, 2:32 PM EDT	Flash Flood Warning	PHI	Monroe	6 hr
Jul 29, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	66 min
Jul 29, 5:28 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh, Northampton	40 min
Jul 29, 5:55 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	4 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.