Alert archive / New Jersey / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 70, NWS Philadelphia/Mount Holly

June 21, 2016Hunterdon County, Mercer County, New Jersey; Bucks County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 21, 2016, 7:20 PM EDT for Hunterdon County, Mercer County, New Jersey; Bucks County, Montgomery County, Pennsylvania. It was in force for 40 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 21, 2016, 7:20 PM EDT (23:20 UTC)
Expired: Jun 21, 2016, 8:00 PM EDT
In force: 40 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hunterdon County, NJ, Mercer County, NJ, Bucks County, PA, Montgomery County, PA

The radar

The Philadelphia radar (KDIX), 54 km from the middle of the area, began a volume at 23:21 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 21, 7:25 PM EDT	HAIL 1	Jamison, PA

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.3 hours before the alert went out and 143 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: 1292 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1267 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 191 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

660 
WUUS51 KPHI 212320 RRA
SVRPHI
NJC019-021-PAC017-091-220000-
/O.NEW.KPHI.SV.W.0070.160621T2320Z-160622T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
720 PM EDT TUE JUN 21 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN MERCER COUNTY IN CENTRAL NEW JERSEY...
  SOUTHERN HUNTERDON COUNTY IN NORTHWESTERN NEW JERSEY...
  CENTRAL BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  EAST CENTRAL MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 800 PM EDT

* AT 720 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR DOYLESTOWN TO NEAR RICHBORO TO WASHINGTON
  CROSSING...MOVING NORTHEAST AT 10 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  TRENTON...EWING...PRINCETON...DOYLESTOWN...HATBORO...CHALFONT...
  PENNINGTON...NEW HOPE...YARDLEY...NEWTOWN...HOPEWELL...IVYLAND...
  LAWRENCEVILLE...WOODSIDE...WASHINGTON CROSSING...RICHBORO...
  MERCERVILLE-HAMILTON SQUARE...HORSHAM...
  LAMBERTVILLE AND NEW BRITAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

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.

&&

LAT...LON 4024 7467 4021 7490 4016 7527 4034 7519
      4042 7475 4037 7472 4039 7467 4039 7465
TIME...MOT...LOC 2320Z 230DEG 7KT 4026 7513 4028 7500 4029 7483 

HAIL...1.00IN
WIND...60MPH
 
$$

LF

2 follow-up statements

230 
WWUS51 KPHI 212345
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
745 PM EDT TUE JUN 21 2016

NJC019-PAC091-212354-
/O.CAN.KPHI.SV.W.0070.000000T0000Z-160622T0000Z/
HUNTERDON NJ-MONTGOMERY PA-
745 PM EDT TUE JUN 21 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN HUNTERDON AND EAST
CENTRAL MONTGOMERY COUNTIES IS CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED
AREA THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4024 7467 4021 7490 4019 7508 4031 7498
      4034 7476 4035 7471 4036 7467 4036 7465
TIME...MOT...LOC 2344Z 230DEG 7KT 4029 7509 4031 7496 4032 7478 

$$

NJC021-PAC017-220000-
/O.CON.KPHI.SV.W.0070.000000T0000Z-160622T0000Z/
MERCER NJ-BUCKS PA-
745 PM EDT TUE JUN 21 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR CENTRAL MERCER AND EAST CENTRAL BUCKS COUNTIES...

AT 744 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR DOYLESTOWN TO NEAR NEW HOPE TO
PENNINGTON...MOVING NORTHEAST AT 10 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
TRENTON...EWING...PRINCETON...PENNINGTON...YARDLEY...NEWTOWN...
WOODSIDE...WASHINGTON CROSSING...RICHBORO...LAWRENCEVILLE...
MERCERVILLE-HAMILTON SQUARE...NEWTOWN GRANT...VILLAGE SHIRES...
CHURCHVILLE...PRINCETON NORTH...WARMINSTER HEIGHTS AND WOODBOURNE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

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.

&&

LAT...LON 4024 7467 4021 7490 4019 7508 4031 7498
      4034 7476 4035 7471 4036 7467 4036 7465
TIME...MOT...LOC 2344Z 230DEG 7KT 4029 7509 4031 7496 4032 7478 

HAIL...1.00IN
WIND...60MPH
 
$$

LF

493 
WWUS51 KPHI 212354
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
754 PM EDT TUE JUN 21 2016

NJC021-PAC017-220004-
/O.EXP.KPHI.SV.W.0070.000000T0000Z-160622T0000Z/
MERCER NJ-BUCKS PA-
754 PM EDT TUE JUN 21 2016

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MERCER AND EAST
CENTRAL BUCKS COUNTIES WILL EXPIRE AT 800 PM EDT...
            
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.  HOWEVER HEAVY RAIN
IS STILL POSSIBLE WITH THESE THUNDERSTORMS.

LAT...LON 4024 7467 4021 7490 4019 7508 4031 7498
      4034 7476 4035 7471 4036 7467 4036 7465
TIME...MOT...LOC 2352Z 230DEG 7KT 4029 7509 4031 7496 4032 7478 

$$

LF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 3:37 AM EDT	Special Weather Statement	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	83 min
Jun 21, 3:58 AM EDT	Special Weather Statement	PHI	Warren	47 min
Jun 21, 4:57 AM EDT	Special Weather Statement	PHI	Hunterdon	63 min
Jun 21, 6:16 AM EDT	Special Weather Statement	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	59 min
Jun 21, 6:18 AM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Ocean	46 min
Jun 21, 6:48 AM EDT	Small Craft Advisory	PHI		9 hr
Jun 21, 2:17 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	58 min
Jun 21, 2:20 PM EDT	Special Marine Warning	PHI		55 min
Jun 21, 2:51 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	54 min
Jun 21, 2:55 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	35 min
Jun 21, 2:58 PM EDT	Special Marine Warning	PHI		62 min
Jun 21, 3:05 PM EDT	Special Marine Warning	PHI		85 min
Jun 21, 3:36 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	54 min
Jun 21, 3:40 PM EDT	Tornado Warning	PHI	Cape May	24 min
Jun 21, 3:46 PM EDT	Special Marine Warning	PHI		89 min
Jun 21, 3:52 PM EDT	Special Marine Warning	PHI		83 min
Jun 21, 3:56 PM EDT	Small Craft Advisory for Hazardous Seas	PHI		17 hr
Jun 21, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	39 min
Jun 21, 4:11 PM EDT	Special Marine Warning	PHI		64 min
Jun 21, 4:18 PM EDT	Special Marine Warning	PHI		87 min
Jun 21, 4:39 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	30 min
Jun 21, 5:29 PM EDT	Special Weather Statement	PHI	Monmouth	46 min
Jun 21, 7:09 PM EDT	Special Weather Statement	PHI	Mercer	51 min
Jun 21, 7:27 PM EDT	Special Marine Warning	PHI		48 min
Jun 21, 7:37 PM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Monmouth	4 hr
Jun 21, 7:51 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	39 min
Jun 21, 7:57 PM EDT	Special Marine Warning	PHI		63 min
Jun 21, 3:17 AM EDT	Special Weather Statement	PHI	Carbon, Monroe	28 min
Jun 21, 5:38 PM EDT	Special Weather Statement	PHI	Chester, Delaware	52 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2016 Severe Thunderstorm Warnings in Pennsylvania, 2016 Every severe thunderstorm warning in 2016

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.