Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 81, NWS Philadelphia/Mount Holly

June 30, 2015Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2015, 6:28 PM EDT for Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey. It was in force for 47 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: Jun 30, 2015, 6:28 PM EDT (22:28 UTC)
Expired: Jun 30, 2015, 7:15 PM EDT
In force: 47 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 131 km from the middle of the area, began a volume at 22:31 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
Jun 30, 6:29 PM EDT	TSTM WND DMG	Hamilton Twp, PA	TREES DOWN ON WIRES

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
Jun 30, 1:21 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.5 hours before the alert went out and 183 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1399 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 40 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.

900 
WUUS51 KPHI 302228
SVRPHI
NJC037-041-PAC089-095-302315-
/O.NEW.KPHI.SV.W.0081.150630T2228Z-150630T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
628 PM EDT TUE JUN 30 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN WARREN COUNTY IN NORTHWESTERN NEW JERSEY...
  SOUTHWESTERN SUSSEX COUNTY IN NORTHWESTERN NEW JERSEY...
  NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  CENTRAL MONROE COUNTY IN NORTHEASTERN PENNSYLVANIA...

* UNTIL 715 PM EDT

* AT 627 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED OVER STORMVILLE...OR 14 MILES
  SOUTH OF MOUNT POCONO...AND MOVING NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  EAST STROUDSBURG...BLAIRSTOWN...BANGOR...PEN ARGYL...WIND GAP...
  HOPE...EAST BANGOR...STORMVILLE...MILLBROOK...GREENDELL...
  COLUMBIA...ECHO LAKE...WERRY LAKE...FLATBROOKVILLE...DELAWARE WATER
  GAP...ANALOMINK...SAYLORSBURG...BRODHEADSVILLE...ALLAMUCHY-PANTHER
  VALLEY AND STROUDSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4094 7478 4085 7533 4097 7541 4112 7507
      4108 7503 4109 7500 4112 7497 4115 7490
TIME...MOT...LOC 2227Z 245DEG 21KT 4093 7527 

$$

HEAVENER

1 follow-up statement

574 
WWUS51 KPHI 302257
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
657 PM EDT TUE JUN 30 2015

NJC037-041-PAC089-095-302315-
/O.CON.KPHI.SV.W.0081.000000T0000Z-150630T2315Z/
WARREN NJ-SUSSEX NJ-NORTHAMPTON PA-MONROE PA-
657 PM EDT TUE JUN 30 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHERN WARREN...SOUTHWESTERN SUSSEX...NORTHEASTERN NORTHAMPTON
AND EAST CENTRAL MONROE COUNTIES...

AT 657 PM EDT...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 ECHO LAKE...OR 16 MILES WEST OF
NEWTON...MOVING NORTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
EAST STROUDSBURG...BLAIRSTOWN...EAST BANGOR...MILLBROOK...
GREENDELL...COLUMBIA...ECHO LAKE...WERRY LAKE...FLATBROOKVILLE...
DELAWARE WATER GAP...ALLAMUCHY-PANTHER VALLEY...STROUDSBURG...
PORTLAND...HIDDEN LAKE...SHAWNEE...MARSHALLS CREEK AND ARLINGTON
HEIGHTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

THIS IS A SUPERCELL THUNDERSTORM. DUE TO THE ROTATING NATURE OF THESE
STORMS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE WEATHER...
INCLUDING EXTREMELY LARGE HAIL...DESTRUCTIVE STRAIGHT LINE WINDS...
AND POSSIBLY TORNADOES. MOVE QUICKLY TO A SAFE SHELTER...PREFERABLY
INTO A BASEMENT...OR AN INTERIOR ROOM SUCH AS A BATHROOM OR CLOSET.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4094 7478 4088 7519 4102 7526 4112 7507
      4108 7503 4109 7500 4112 7497 4115 7490
TIME...MOT...LOC 2257Z 245DEG 21KT 4100 7506 

$$

MWG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 10:01 AM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	4 hr
Jun 30, 12:37 PM EDT	Areal Flood Advisory	PHI	Berks	4 hr
Jun 30, 12:47 PM EDT	Special Weather Statement	PHI	Berks	43 min
Jun 30, 1:08 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	52 min
Jun 30, 1:47 PM EDT	Special Weather Statement	PHI	Lehigh	43 min
Jun 30, 1:48 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Jun 30, 1:55 PM EDT	Special Weather Statement	PHI	Chester	50 min
Jun 30, 2:00 PM EDT	Tornado Warning	PHI	Berks, Chester	30 min
Jun 30, 2:05 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	55 min
Jun 30, 2:13 PM EDT	Tornado Warning	PHI	Lehigh	32 min
Jun 30, 2:19 PM EDT	Special Weather Statement	PHI	Chester	26 min
Jun 30, 2:26 PM EDT	Areal Flood Advisory	PHI	Berks, Chester	4 hr
Jun 30, 2:34 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Montgomery	56 min
Jun 30, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Chester	49 min
Jun 30, 2:42 PM EDT	Tornado Warning	PHI	Lehigh, Northampton	33 min
Jun 30, 2:48 PM EDT	Special Weather Statement	PHI	Chester	57 min
Jun 30, 2:52 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	38 min
Jun 30, 2:55 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh, Northampton	4 hr
Jun 30, 3:00 PM EDT	Areal Flood Advisory	PHI	Bucks, Monroe, Northampton	4 hr
Jun 30, 3:00 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	60 min
Jun 30, 3:08 PM EDT	Areal Flood Advisory	PHI	Chester	4 hr
Jun 30, 3:22 PM EDT	Tornado Warning	PHI	Chester, Delaware, Montgomery	23 min
Jun 30, 3:25 PM EDT	Severe Thunderstorm Warning	PHI	Chester	37 min
Jun 30, 3:31 PM EDT	Special Weather Statement	PHI	Lehigh	44 min
Jun 30, 3:37 PM EDT	Areal Flood Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	4 hr
Jun 30, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Philadelphia	47 min
Jun 30, 3:45 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	45 min
Jun 30, 3:47 PM EDT	Severe Thunderstorm Warning	PHI	Northampton	43 min
Jun 30, 3:54 PM EDT	Flash Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	13 hr
Jun 30, 3:57 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Jun 30, 4:22 PM EDT	Special Weather Statement	PHI	Monroe	23 min
Jun 30, 4:29 PM EDT	Special Weather Statement	PHI	Delaware, Philadelphia	31 min
Jun 30, 4:31 PM EDT	Special Weather Statement	PHI	Carbon	29 min
Jun 30, 4:58 PM EDT	Areal Flood Advisory	PHI	Delaware, Montgomery, Philadelphia	3 hr
Jun 30, 4:59 PM EDT	Special Weather Statement	PHI	Philadelphia	61 min
Jun 30, 5:03 PM EDT	Special Weather Statement	PHI	Monroe	27 min
Jun 30, 5:51 PM EDT	Special Weather Statement	PHI	Monroe	24 min
Jun 30, 6:03 PM EDT	Flash Flood Warning	PHI	Carbon, Monroe	11 hr
Jun 30, 7:13 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	62 min
Jun 30, 3:22 PM EDT	Special Marine Warning	PHI		23 min
Jun 30, 4:13 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	32 min
Jun 30, 4:35 PM EDT	Special Weather Statement	PHI	Morris	25 min
Jun 30, 5:48 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	57 min
Jun 30, 6:20 PM EDT	Special Weather Statement	PHI	Warren	25 min
Jun 30, 6:35 PM EDT	Small Craft Advisory	PHI		3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2015 Severe Thunderstorm Warnings in New Jersey, 2015 Every severe thunderstorm warning in 2015

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.