Alert archive / New Jersey / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 17, NWS Philadelphia/Mount Holly

April 1, 2016Hunterdon County, Mercer County, New Jersey; Bucks County, Montgomery County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 1, 2016, 5:45 PM EDT for Hunterdon County, Mercer County, New Jersey; Bucks County, Montgomery County, Pennsylvania. It was in force for 30 min. 3 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: Apr 1, 2016, 5:45 PM EDT (21:45 UTC)
Expired: Apr 1, 2016, 6:15 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 21:48 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
Apr 1, 5:45 PM EDT	HAIL 0.88	Green Lane, PA	NICKEL SIZE HAIL REPORTED IN GREEN LANE.
Apr 1, 5:50 PM EDT	HAIL 0.25	Perkasie, PA	PEA SIZE HAIL REPORTED IN PERKASIE.
Apr 1, 6:08 PM EDT	TSTM WND DMG	Delaware Twp, NJ	WIRES DOWN

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 12:00Z, 9.8 hours before the alert went out and 208 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: 655 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 193 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

213 
WUUS51 KPHI 012145
SVRPHI
NJC019-021-PAC017-091-012215-
/O.NEW.KPHI.SV.W.0017.160401T2145Z-160401T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
545 PM EDT FRI APR 1 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...
  NORTHWESTERN BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  NORTHWESTERN MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 615 PM EDT

* AT 544 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 GREEN LANE...OR 17 MILES
  SOUTH OF ALLENTOWN...AND MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  QUAKERTOWN...PERKASIE...DOYLESTOWN...BYRAM...SOUDERTON...BEDMINSTER...
  FLEMINGTON...CHALFONT...TINICUM...HATFIELD...CLINTON...NEW HOPE...DUBLIN...
  FERNDALE...SCHWENKSVILLE...FRENCHTOWN...MILFORD...STOCKTON...GREEN LANE
  AND FRICKS.

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.

&&

LAT...LON 4022 7548 4036 7558 4066 7492 4041 7478
TIME...MOT...LOC 2144Z 245DEG 63KT 4034 7542 

$$

SZATKOWSKI

1 follow-up statement

228 
WWUS51 KPHI 012159
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
559 PM EDT FRI APR 1 2016

PAC091-012207-
/O.CAN.KPHI.SV.W.0017.000000T0000Z-160401T2215Z/
MONTGOMERY PA-
559 PM EDT FRI APR 1 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MONTGOMERY COUNTY
IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4030 7526 4044 7539 4066 7492 4041 7478
TIME...MOT...LOC 2157Z 245DEG 63KT 4044 7513 

$$

NJC019-021-PAC017-012215-
/O.CON.KPHI.SV.W.0017.000000T0000Z-160401T2215Z/
MERCER NJ-HUNTERDON NJ-BUCKS PA-
559 PM EDT FRI APR 1 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN MERCER...SOUTHERN HUNTERDON AND NORTHWESTERN BUCKS
COUNTIES...

AT 557 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 TINICUM...OR 17 MILES SOUTH OF
EASTON...MOVING NORTHEAST AT 50 MPH.

LOCATIONS IMPACTED INCLUDE...
QUAKERTOWN...PERKASIE...BYRAM...BEDMINSTER...FLEMINGTON...TINICUM...
CLINTON...NEW HOPE...DUBLIN...FERNDALE...FRENCHTOWN...MILFORD...STOCKTON...
FRICKS...SAND BROOK...GARDENVILLE...SERGEANTSVILLE...REVERE...OTTSVILLE
AND LUMBERVILLE.

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.

&&

LAT...LON 4030 7526 4044 7539 4066 7492 4041 7478
TIME...MOT...LOC 2157Z 245DEG 63KT 4044 7513 

$$

SZATKOWSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 1, 4:08 AM EDT	High Wind Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	24 hr
Apr 1, 4:14 AM EDT	Storm Watch	PHI		17 hr
Apr 1, 9:59 AM EDT	Special Marine Warning	PHI		46 min
Apr 1, 10:13 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	47 min
Apr 1, 10:31 AM EDT	Special Marine Warning	PHI		44 min
Apr 1, 10:45 AM EDT	Special Weather Statement	PHI	Atlantic, Ocean	45 min
Apr 1, 5:25 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris	65 min
Apr 1, 6:25 PM EDT	Special Weather Statement	PHI	Morris	35 min
Apr 1, 6:43 PM EDT	Special Weather Statement	PHI	Gloucester	32 min
Apr 1, 7:12 PM EDT	Special Weather Statement	PHI	Burlington, Camden	48 min
Apr 1, 7:30 PM EDT	Special Weather Statement	PHI	Monmouth	60 min
Apr 1, 7:40 PM EDT	Special Weather Statement	PHI	Mercer	35 min
Apr 1, 2:57 PM EDT	Special Weather Statement	PHI	Monroe	48 min
Apr 1, 3:41 PM EDT	Freeze Watch	PHI	Chester, Montgomery	18 hr
Apr 1, 5:15 PM EDT	Special Weather Statement	PHI	Chester	30 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.