Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 265, NWS Philadelphia/Mount Holly

August 19, 2011Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 19, 2011, 3:47 PM EDT for Carbon County, Monroe County, Pennsylvania. It was in force for 58 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 19, 2011, 3:47 PM EDT (19:47 UTC)
Expired: Aug 19, 2011, 4:45 PM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Carbon County, PA, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 19:50 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 19, 1:04 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.8 hours before the alert went out and 181 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: 146 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1250 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 359 m²/s²
0-3 km storm-relative helicity: 370 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.

158 
WUUS51 KPHI 191947
SVRPHI
PAC025-089-192045-
/O.NEW.KPHI.SV.W.0265.110819T1947Z-110819T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
347 PM EDT FRI AUG 19 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF LEHIGHTON...
  SOUTHERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 445 PM EDT

* AT 345 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM LAKE HARMONY TO 8 MILES WEST OF
  NESQUEHONING TO 22 MILES WEST OF NEW MAHONING...OR ALONG A LINE
  EXTENDING FROM 13 MILES WEST OF MOUNT POCONO TO 14 MILES WEST OF
  LEHIGHTON TO 27 MILES WEST OF LEHIGHTON...AND MOVING EAST AT 10
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  WEATHERLY AROUND 400 PM EDT...
  ALBRIGHTSVILLE AROUND 425 PM EDT...
  POCONO RACEWAY AROUND 440 PM EDT...
  LONG POND...CHRISTMANS...MECKESVILLE AND NESQUEHONING AROUND 445 PM
  EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. HEAVY
RAIN WILL ALSO OCCUR. 

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR NORTHERN DELAWARE AND NEW JERSEY AND EASTERN
PENNSYLVANIA.

&&

LAT...LON 4109 7503 4110 7499 4108 7497 4102 7505
      4100 7511 4096 7514 4092 7524 4086 7531
      4077 7570 4075 7580 4084 7594 4090 7600
      4107 7560 4115 7513 4115 7509
TIME...MOT...LOC 1947Z 257DEG 9KT 4105 7559 4089 7596
          4073 7621

$$

TFG

2 follow-up statements

789 
WWUS51 KPHI 192020
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
420 PM EDT FRI AUG 19 2011

PAC025-089-192045-
/O.CON.KPHI.SV.W.0265.000000T0000Z-110819T2045Z/
CARBON PA-MONROE PA-
420 PM EDT FRI AUG 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHERN MONROE AND CARBON COUNTIES...

AT 415 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM ALPINE MOUNTAIN TO
MECKESVILLE TO WEATHERLY TO LANSFORD...OR ALONG A LINE EXTENDING FROM
10 MILES EAST OF MOUNT POCONO TO 14 MILES SOUTHWEST OF MOUNT POCONO
TO 7 MILES NORTHWEST OF LEHIGHTON TO 11 MILES WEST OF LEHIGHTON...
MOVING EAST AT 20 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  SUMMIT HILL BY 425 PM EDT...
  NEW MAHONING AND NESQUEHONING BY 430 PM EDT...
  JONAS BY 440 PM EDT...
  ANALOMINK...REEDERS...PENN FOREST RESERVOIR AND ECHO LAKE BY 445 PM
  EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS LINE OF STORMS. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR NORTHERN DELAWARE AND NEW JERSEY AND EASTERN
PENNSYLVANIA.

&&

LAT...LON 4109 7503 4110 7499 4108 7497 4102 7505
      4100 7512 4096 7514 4092 7524 4086 7531
      4075 7579 4083 7592 4090 7597 4103 7556
      4115 7513 4115 7509
TIME...MOT...LOC 2020Z 263DEG 19KT 4111 7514 4100 7553
          4092 7578 4086 7590

$$

TFG

815 
WWUS51 KPHI 192043
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
443 PM EDT FRI AUG 19 2011

PAC025-089-192053-
/O.EXP.KPHI.SV.W.0265.000000T0000Z-110819T2045Z/
CARBON PA-MONROE PA-
443 PM EDT FRI AUG 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN MONROE AND CARBON
COUNTIES WILL EXPIRE AT 445 PM EDT...

THE LINE OF SEVERE STORMS IS NOW ENTERING THE LEHIGH VALLEY.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR NORTHERN DELAWARE AND NEW JERSEY AND EASTERN
PENNSYLVANIA.

LAT...LON 4109 7503 4110 7499 4108 7497 4102 7505
      4100 7512 4096 7514 4092 7524 4086 7531
      4075 7579 4083 7592 4090 7597 4103 7556
      4115 7513 4115 7509
TIME...MOT...LOC 2043Z 263DEG 19KT 4112 7498 4101 7537
          4093 7562 4087 7574

$$
 
TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 8:08 PM EDT	Special Weather Statement	PHI	Berks	67 min
Aug 18, 8:26 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	112 min
Aug 18, 8:31 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	59 min
Aug 18, 8:48 PM EDT	Special Weather Statement	PHI	Monroe	57 min
Aug 18, 8:48 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	57 min
Aug 19, 12:02 AM EDT	Special Weather Statement	PHI	Chester	58 min
Aug 19, 12:50 AM EDT	Special Weather Statement	PHI	Chester, Delaware	40 min
Aug 19, 1:14 AM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	3 hr
Aug 19, 1:31 AM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	59 min
Aug 19, 4:00 AM EDT	Areal Flood Warning	PHI	Delaware	4 hr
Aug 19, 1:46 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	59 min
Aug 19, 2:35 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	70 min
Aug 19, 2:38 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	3 hr
Aug 19, 2:57 PM EDT	Flash Flood Warning	PHI	Carbon, Monroe	3 hr
Aug 19, 4:29 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	61 min
Aug 19, 4:32 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	2 hr
Aug 19, 4:52 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	53 min
Aug 19, 5:35 PM EDT	Severe Thunderstorm Warning	PHI	Chester	55 min
Aug 19, 5:39 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	3 hr
Aug 19, 5:42 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Montgomery	48 min
Aug 19, 5:45 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery, Philadelphia	3 hr
Aug 19, 5:59 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	80 min
Aug 19, 6:14 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	65 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2011 Every severe thunderstorm warning in 2011

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.