Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 52, NWS Philadelphia/Mount Holly

May 19, 2011Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 19, 2011, 3:37 PM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 53 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: May 19, 2011, 3:37 PM EDT (19:37 UTC)
Expired: May 19, 2011, 4:30 PM EDT
In force: 53 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Warren County, NJ, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 19:38 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
May 19, 4:10 PM EDT	HAIL 0.75	Forks Twp, PA

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 19, 12:20 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.6 hours before the alert went out and 169 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: 143 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 819 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

861 
WUUS51 KPHI 191937
SVRPHI
NJC041-PAC089-095-192030-
/O.NEW.KPHI.SV.W.0052.110519T1937Z-110519T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
337 PM EDT THU MAY 19 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  SOUTH CENTRAL MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  CENTRAL WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 430 PM EDT

* AT 334 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR HARMONY...OR 6 MILES EAST OF EASTON...AND
  MOVING NORTHWEST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROXBURG AROUND 345 PM EDT...
  TATAMY AROUND 350 PM EDT...
  BELFAST AROUND 400 PM EDT...
  BANGOR AND EAST BANGOR AROUND 405 PM EDT...
  PEN ARGYL AND WIND GAP AROUND 410 PM EDT...
  SAYLORSBURG AND STORMVILLE AROUND 420 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4076 7534 4089 7548 4104 7522 4086 7498
      4079 7499 4069 7514
TIME...MOT...LOC 1937Z 141DEG 19KT 4073 7512

$$

HEAVENER

1 follow-up statement

794 
WWUS51 KPHI 192000
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
400 PM EDT THU MAY 19 2011

NJC041-PAC089-095-192030-
/O.CON.KPHI.SV.W.0052.000000T0000Z-110519T2030Z/
WARREN NJ-NORTHAMPTON PA-MONROE PA-
400 PM EDT THU MAY 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR SOUTH CENTRAL MONROE...NORTHEASTERN NORTHAMPTON AND WEST CENTRAL
WARREN COUNTIES...

AT 355 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS LOCATED NEAR BELFAST...
OR 8 MILES NORTH OF EASTON...MOVING NORTHWEST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BANGOR AND EAST BANGOR BY 405 PM EDT...
  PEN ARGYL...WIND GAP AND ROSETO BY 410 PM EDT...
  SAYLORSBURG AND STORMVILLE BY 420 PM EDT...
  ROSSLAND BY 425 PM EDT...
  BRODHEADSVILLE BY 430 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4076 7534 4089 7548 4104 7522 4095 7510
      4088 7505 4079 7508 4070 7513 4069 7514
TIME...MOT...LOC 2000Z 141DEG 19KT 4082 7522

$$

HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 8:29 PM EDT	Areal Flood Warning	PHI	Morris	4 days
May 19, 3:35 AM EDT	River Flood Warning	PHI	Essex, Morris, Passaic	4 days
May 19, 10:26 AM EDT	River Flood Warning	PHI	Essex, Passaic	65 hr
May 19, 10:28 AM EDT	River Flood Warning	PHI	Passaic	11 hr
May 19, 2:19 PM EDT	Special Weather Statement	PHI	Camden, Cumberland, Gloucester, Salem	56 min
May 19, 2:34 PM EDT	Special Weather Statement	PHI	Warren	56 min
May 19, 3:01 PM EDT	Areal Flood Advisory	PHI	Camden, Gloucester, Salem	3 hr
May 19, 3:23 PM EDT	Special Weather Statement	PHI	Hunterdon	67 min
May 19, 3:34 PM EDT	Small Craft Advisory for Hazardous Seas	PHI		12 hr
May 19, 3:40 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	5 hr
May 19, 3:52 PM EDT	Coastal Flood Statement	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more	8 hr
May 19, 4:02 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	58 min
May 19, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	54 min
May 19, 4:20 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	55 min
May 19, 4:31 PM EDT	Special Weather Statement	PHI	Hunterdon	59 min
May 19, 4:39 PM EDT	Flash Flood Warning	PHI	Hunterdon, Warren	4 hr
May 19, 5:08 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	50 min
May 19, 5:21 PM EDT	Special Weather Statement	PHI	Burlington	54 min
May 19, 5:43 PM EDT	Special Marine Warning	PHI		62 min
May 19, 5:58 PM EDT	Special Weather Statement	PHI	Sussex	47 min
May 19, 6:08 PM EDT	Special Weather Statement	PHI	Cumberland, Salem	52 min
May 19, 7:34 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester	56 min
May 19, 7:50 PM EDT	Special Weather Statement	PHI	Burlington, Camden	55 min
May 19, 12:31 PM EDT	Special Weather Statement	PHI	Berks	89 min
May 19, 1:26 PM EDT	Areal Flood Advisory	PHI	Berks	5 hr
May 19, 1:29 PM EDT	Severe Thunderstorm Warning	PHI	Berks	61 min
May 19, 2:22 PM EDT	Severe Thunderstorm Warning	PHI	Berks	41 min
May 19, 2:54 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Northampton	3 hr
May 19, 3:00 PM EDT	Special Weather Statement	PHI	Carbon	60 min
May 19, 3:05 PM EDT	Special Weather Statement	PHI	Lehigh, Northampton	55 min
May 19, 3:12 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Monroe, Northampton	63 min
May 19, 3:15 PM EDT	Special Weather Statement	PHI	Chester, Delaware, Montgomery, Philadelphia	60 min
May 19, 4:18 PM EDT	Special Weather Statement	PHI	Monroe	57 min
May 19, 4:28 PM EDT	Special Weather Statement	PHI	Bucks	62 min
May 19, 4:50 PM EDT	Special Weather Statement	PHI	Monroe	55 min
May 19, 7:23 PM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	82 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2011 Severe Thunderstorm Warnings in New Jersey, 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.