Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 158, NWS Philadelphia/Mount Holly

July 7, 2011Carbon County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 7, 2011, 9:10 PM EDT for Carbon County, Pennsylvania. It was in force for 67 min. 4 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: Jul 7, 2011, 9:10 PM EDT (01:10 UTC)
Expired: Jul 7, 2011, 10:17 PM EDT
In force: 67 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Carbon County, PA

The radar

The Binghamton radar (KBGM), 142 km from the middle of the area, began a volume at 01:11 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 7, 9:28 PM EDT	TSTM WND DMG	3 Ene Hometown, PA	NUMEROUS TREES DOWN ACROSS EASTERN RUSH TOWNSHIP. TREE FELL ON HOUSE IN LAKE HAUTO AREA.
Jul 7, 9:36 PM EDT	TSTM WND DMG	Nesquehoning, PA	TREES REPORTED DOWN IN NESQUEHONING.
Jul 7, 9:40 PM EDT	HAIL 0.75	Summit Hill, PA	PENNY SIZE HAIL REPORTED IN SUMMIT HILL.
Jul 7, 9:50 PM EDT	HAIL 0.5	Summit Hill, PA

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 1.2 hours before the alert went out and 244 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: 1372 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1024 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

676 
WUUS51 KPHI 080110
SVRPHI
PAC025-080230-
/O.NEW.KPHI.SV.W.0158.110708T0110Z-110708T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
910 PM EDT THU JUL 7 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...

* UNTIL 1030 PM EDT

* AT 906 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 13
  MILES WEST OF NESQUEHONING...OR 19 MILES WEST OF LEHIGHTON...AND
  MOVING EAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WEATHERLY...NESQUEHONING AND 7 MILES NORTH OF NEW MAHONING AROUND
  1010 PM EDT...
  JIM THORPE...LEHIGHTON...7 MILES SOUTHWEST OF CHRISTMANS AND 7
  MILES WEST OF BELTZVILLE STATE PARK AROUND 1030 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.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.

&&

LAT...LON 4105 7559 4095 7559 4080 7553 4079 7579
      4080 7587 4084 7594 4091 7600 4095 7588
      4098 7584 4100 7575 4103 7576
TIME...MOT...LOC 0110Z 270DEG 11KT 4090 7606

$$

NIERENBERG

2 follow-up statements

656 
WWUS51 KPHI 080213
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1013 PM EDT THU JUL 7 2011

PAC025-080230-
/O.CON.KPHI.SV.W.0158.000000T0000Z-110708T0230Z/
CARBON PA-
1013 PM EDT THU JUL 7 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR SOUTHERN CARBON COUNTY...

AT 1010 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR NESQUEHONING...OR 7 MILES NORTHWEST OF LEHIGHTON...
MOVING EAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  JIM THORPE...LEHIGHTON...WEISSPORT EAST AND WEISSPORT BY 1030 PM
  EDT...

LAT...LON 4081 7588 4085 7589 4084 7588 4086 7584
      4089 7582 4092 7572 4090 7567 4080 7554
      4079 7579 4080 7587 4084 7594
TIME...MOT...LOC 0213Z 270DEG 11KT 4090 7581

$$

NIERENBERG

256 
WWUS51 KPHI 080217
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1017 PM EDT THU JUL 7 2011

PAC025-080227-
/O.CAN.KPHI.SV.W.0158.000000T0000Z-110708T0230Z/
CARBON PA-
1017 PM EDT THU JUL 7 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CARBON COUNTY IS
CANCELLED...

LAT...LON 4081 7588 4085 7589 4084 7588 4086 7584
      4089 7582 4092 7572 4090 7567 4080 7554
      4079 7579 4080 7587 4084 7594
TIME...MOT...LOC 0217Z 270DEG 11KT 4090 7579

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 8:56 PM EDT	Special Weather Statement	PHI	Carbon	94 min
Jul 7, 9:47 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Northampton	73 min
Jul 7, 10:55 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	28 min
Jul 8, 2:40 AM EDT	Special Weather Statement	PHI	Berks	65 min
Jul 8, 3:58 AM EDT	Flash Flood Watch	PHI	Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more	19 hr
Jul 8, 12:56 PM EDT	Special Weather Statement	PHI	Philadelphia	64 min
Jul 8, 2:12 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	93 min
Jul 8, 2:23 PM EDT	Special Weather Statement	PHI	Monroe, Northampton	82 min
Jul 8, 2:25 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	7 hr
Jul 8, 2:48 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	57 min
Jul 8, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	54 min
Jul 8, 2:56 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Montgomery	3 hr
Jul 8, 3:35 PM EDT	Special Weather Statement	PHI	Montgomery	55 min
Jul 8, 3:40 PM EDT	Areal Flood Advisory	PHI	Berks, Lehigh, Northampton	3 hr
Jul 8, 3:44 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Lehigh, Monroe, Montgomery and 1 more	76 min
Jul 8, 3:45 PM EDT	Flash Flood Warning	PHI	Philadelphia	3 hr
Jul 8, 4:18 PM EDT	Flash Flood Warning	PHI	Monroe	2 hr
Jul 8, 4:29 PM EDT	Areal Flood Advisory	PHI	Chester	4 hr
Jul 8, 5:33 PM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Jul 8, 5:44 PM EDT	Flash Flood Warning	PHI	Delaware, Philadelphia	3 hr

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