Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 151, NWS Philadelphia/Mount Holly

August 1, 2012Carbon County, Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 1, 2012, 5:55 PM EDT for Carbon County, Monroe County, Northampton County, Pennsylvania. It was in force for 65 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 1, 2012, 5:55 PM EDT (21:55 UTC)
Expired: Aug 1, 2012, 7:00 PM EDT
In force: 65 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Carbon County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 21:57 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 nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.9 hours before the alert went out and 159 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: 897 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 643 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: -2 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.

424 
WUUS51 KPHI 012155
SVRPHI
PAC025-089-095-012300-
/O.NEW.KPHI.SV.W.0151.120801T2155Z-120801T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
555 PM EDT WED AUG 1 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  SOUTHEASTERN CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF LEHIGHTON...
  SOUTHWESTERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 700 PM EDT

* AT 552 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 NEAR   
  JIM THORPE...OR NEAR LEHIGHTON...AND MOVING EAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BELTZVILLE STATE PARK AROUND 625 PM EDT...
  PALMERTON AROUND 630 PM EDT...
  PENN FOREST RESERVOIR AROUND 640 PM EDT...
  7 MILES NORTH OF WALNUTPORT AROUND 645 PM EDT...
  KRESGEVILLE...KUNKLETOWN...7 MILES SOUTHWEST OF GILBERT AND 8 MILES
  WEST OF ROSSLAND AROUND 700 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE 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.

&&

LAT...LON 4096 7533 4070 7540 4075 7560 4079 7561
      4077 7569 4079 7581 4098 7576
TIME...MOT...LOC 2155Z 280DEG 5KT 4087 7567

$$

HAYES

2 follow-up statements

075 
WWUS51 KPHI 012224
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
624 PM EDT WED AUG 1 2012

PAC025-089-095-012300-
/O.CON.KPHI.SV.W.0151.000000T0000Z-120801T2300Z/
MONROE PA-CARBON PA-NORTHAMPTON PA-
624 PM EDT WED AUG 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR WEST CENTRAL NORTHAMPTON...SOUTHEASTERN CARBON AND SOUTHWESTERN
MONROE COUNTIES...

AT 622 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 BELTZVILLE STATE PARK...OR 6 MILES NORTHEAST OF
LEHIGHTON...MOVING EAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BELTZVILLE STATE PARK BY 630 PM EDT...
  PALMERTON BY 635 PM EDT...
  PENN FOREST RESERVOIR BY 645 PM EDT...
  7 MILES NORTH OF WALNUTPORT BY 650 PM EDT...
  TRACHSVILLE...KRESGEVILLE...KUNKLETOWN AND 6 MILES WEST OF
  FIDDLETOWN BY 700 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4096 7533 4070 7540 4075 7560 4079 7561
      4077 7569 4078 7577 4079 7578 4097 7557
TIME...MOT...LOC 2224Z 280DEG 5KT 4086 7562

$$

HAYES

824 
WWUS51 KPHI 012258
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
658 PM EDT WED AUG 1 2012

PAC025-089-095-012309-
/O.EXP.KPHI.SV.W.0151.000000T0000Z-120801T2300Z/
MONROE PA-CARBON PA-NORTHAMPTON PA-
658 PM EDT WED AUG 1 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL NORTHAMPTON...
SOUTHEASTERN CARBON AND SOUTHWESTERN MONROE COUNTIES WILL EXPIRE AT
700 PM EDT...

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.

LAT...LON 4096 7533 4070 7540 4075 7560 4079 7561
      4077 7569 4078 7577 4079 7578 4097 7557
TIME...MOT...LOC 2259Z 280DEG 5KT 4085 7556

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 8:11 PM EDT	Special Weather Statement	PHI	Berks	64 min
Jul 31, 9:12 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	63 min
Jul 31, 9:51 PM EDT	Coastal Flood Statement	PHI	Delaware, Philadelphia	5 hr
Aug 1, 1:02 AM EDT	Special Weather Statement	PHI	Chester	58 min
Aug 1, 2:03 PM EDT	Special Weather Statement	PHI	Chester	57 min
Aug 1, 2:27 PM EDT	Special Weather Statement	PHI	Bucks	63 min
Aug 1, 2:47 PM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Aug 1, 3:03 PM EDT	Special Weather Statement	PHI	Monroe	57 min
Aug 1, 3:31 PM EDT	Coastal Flood Statement	PHI	Delaware, Philadelphia	11 hr
Aug 1, 3:35 PM EDT	Special Weather Statement	PHI	Philadelphia	55 min
Aug 1, 4:07 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery	3 hr
Aug 1, 4:16 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	59 min
Aug 1, 4:51 PM EDT	Areal Flood Advisory	PHI	Monroe	36 min
Aug 1, 4:53 PM EDT	Special Weather Statement	PHI	Philadelphia	67 min
Aug 1, 5:06 PM EDT	Areal Flood Advisory	PHI	Montgomery, Philadelphia	12 min
Aug 1, 5:09 PM EDT	Flash Flood Warning	PHI	Montgomery, Philadelphia	3 hr
Aug 1, 5:22 PM EDT	Flash Flood Warning	PHI	Monroe	106 min
Aug 1, 5:34 PM EDT	Special Weather Statement	PHI	Carbon	56 min
Aug 1, 5:43 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery	62 min
Aug 1, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Philadelphia	31 min
Aug 1, 5:50 PM EDT	Special Weather Statement	PHI	Montgomery	55 min
Aug 1, 5:53 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	100 min
Aug 1, 6:08 PM EDT	Flash Flood Warning	PHI	Chester, Montgomery	2 hr
Aug 1, 6:16 PM EDT	Areal Flood Advisory	PHI	Philadelphia	46 min
Aug 1, 6:22 PM EDT	Special Weather Statement	PHI	Lehigh	53 min
Aug 1, 6:30 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	64 min
Aug 1, 6:53 PM EDT	Areal Flood Advisory	PHI	Lehigh, Northampton	69 min
Aug 1, 6:59 PM EDT	Special Weather Statement	PHI	Northampton	61 min
Aug 1, 7:32 PM EDT	Special Weather Statement	PHI	Chester	58 min
Aug 1, 7:49 PM EDT	Areal Flood Advisory	PHI	Chester	52 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2012 Every severe thunderstorm warning in 2012

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.