Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 45, NWS Philadelphia/Mount Holly

May 15, 2011Morris County, Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 15, 2011, 8:21 PM EDT for Morris County, Sussex County, New Jersey. It was in force for 35 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: May 15, 2011, 8:21 PM EDT (00:21 UTC)
Expired: May 15, 2011, 8:56 PM EDT
In force: 35 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Morris County, NJ, Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 126 km from the middle of the area, began a volume at 00:24 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

Brookhaven, NY (KOKX), launched 00:00Z, 0.4 hours before the alert went out and 134 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: 185 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 731 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 71 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.

740 
WUUS51 KPHI 160021
SVRPHI
NJC027-037-160115-
/O.NEW.KPHI.SV.W.0045.110516T0021Z-110516T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
821 PM EDT SUN MAY 15 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN MORRIS COUNTY IN NORTHERN NEW JERSEY...
  NORTHEASTERN SUSSEX COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 915 PM EDT

* AT 816 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 13 MILES NORTHEAST OF NEWTON TO 6 MILES EAST OF NEWTON...AND 
  MOVING NORTHEAST AT 25 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  HAMBURG AND VERNON VALLEY AROUND 835 PM EDT...
  HIGHLAND LAKE AROUND 845 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.

&&

LAT...LON 4119 7437 4109 7448 4101 7439 4099 7429
      4097 7427 4092 7429 4101 7442 4103 7442
      4104 7445 4105 7444 4108 7448 4108 7450
      4121 7470 4130 7459
TIME...MOT...LOC 0021Z 218DEG 21KT 4122 7455 4114 7454
          4108 7461

$$

HAYES

2 follow-up statements

526 
WWUS51 KPHI 160031
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
831 PM EDT SUN MAY 15 2011

NJC027-160041-
/O.CAN.KPHI.SV.W.0045.000000T0000Z-110516T0115Z/
MORRIS NJ-
831 PM EDT SUN MAY 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MORRIS COUNTY IS
CANCELLED...

THE STORM HAS MOVED NORTH OF THE WARNING AREA.

LAT...LON 4119 7437 4109 7448 4108 7448 4108 7450
      4121 7470 4130 7459
TIME...MOT...LOC 0031Z 218DEG 21KT 4125 7451 4118 7449
          4114 7455

$$

NJC037-160115-
/O.CON.KPHI.SV.W.0045.000000T0000Z-110516T0115Z/
SUSSEX NJ-
831 PM EDT SUN MAY 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR NORTHEASTERN SUSSEX COUNTY...

AT 828 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM VERNON VALLEY TO HIGHLAND LAKE TO HAMBURG...OR ALONG A
LINE EXTENDING FROM 15 MILES EAST OF MONTAGUE TO 15 MILES NORTHEAST
OF NEWTON TO 11 MILES NORTHEAST OF NEWTON...MOVING NORTHEAST AT 25
MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  HIGHLAND LAKE BY 845 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.

&&

LAT...LON 4119 7437 4109 7448 4108 7448 4108 7450
      4121 7470 4130 7459
TIME...MOT...LOC 0031Z 218DEG 21KT 4125 7451 4118 7449
          4114 7455

$$

HAYES

201 
WWUS51 KPHI 160056
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
856 PM EDT SUN MAY 15 2011

NJC037-160105-
/O.CAN.KPHI.SV.W.0045.000000T0000Z-110516T0115Z/
SUSSEX NJ-
856 PM EDT SUN MAY 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN SUSSEX COUNTY IS
CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS EXITED THE AREA.

LAT...LON 4119 7437 4109 7448 4108 7448 4108 7450
      4121 7470 4130 7459
TIME...MOT...LOC 0055Z 218DEG 21KT 4136 7439 4129 7437
          4125 7443

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 8:53 PM EDT	Special Weather Statement	PHI	Hunterdon, Warren	67 min
May 15, 9:17 PM EDT	Special Weather Statement	PHI	Salem	58 min
May 15, 9:46 PM EDT	Special Weather Statement	PHI	Sussex, Warren	59 min
May 15, 10:08 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	3 hr
May 15, 10:12 PM EDT	Special Weather Statement	PHI	Gloucester, Salem	63 min
May 15, 10:16 PM EDT	Areal Flood Advisory	PHI	Cumberland, Gloucester, Salem	3 hr
May 15, 10:28 PM EDT	Special Weather Statement	PHI	Cumberland	62 min
May 15, 10:56 PM EDT	Special Weather Statement	PHI	Sussex	64 min
May 15, 11:10 PM EDT	Special Weather Statement	PHI	Mercer	65 min
May 15, 11:14 PM EDT	Areal Flood Advisory	PHI	Hunterdon	3 hr
May 15, 11:18 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Warren	57 min
May 15, 11:31 PM EDT	Special Weather Statement	PHI	Warren	59 min
May 15, 11:43 PM EDT	Special Weather Statement	PHI	Burlington	62 min
May 15, 11:58 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Somerset	62 min
May 16, 12:07 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	3 hr
May 16, 12:10 AM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	65 min
May 16, 3:32 AM EDT	Small Craft Advisory	PHI		4 days
May 16, 2:33 PM EDT	Special Weather Statement	PHI	Burlington	57 min
May 16, 2:50 PM EDT	Areal Flood Advisory	PHI	Burlington	3 hr
May 16, 3:50 PM EDT	Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more	60 hr
May 16, 4:37 PM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more	17 hr

Nearby

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.