Alert archive / New Jersey / Tornado Warnings in 2011

Tornado Warning 3, NWS Philadelphia/Mount Holly

April 28, 2011Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this tornado warning at Apr 28, 2011, 11:45 AM EDT for Morris County, New Jersey. It was in force for 30 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: Apr 28, 2011, 11:45 AM EDT (15:45 UTC)
Expired: Apr 28, 2011, 12:15 PM EDT
In force: 30 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Morris County, NJ

The radar

The Philadelphia radar (KDIX), 113 km from the middle of the area, began a volume at 15:46 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 28, 12:05 PM EDT	TSTM WND DMG	Denville, NJ	A TREE BLOWN DOWN ONTO POWER LINES IN DENVILLE.

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
Apr 28, 9:45 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 3.8 hours before the alert went out and 133 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: 211 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 513 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 346 m²/s²
0-3 km storm-relative helicity: 324 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.

768 
WFUS51 KPHI 281545
TORPHI
NJC027-281615-
/O.NEW.KPHI.TO.W.0003.110428T1545Z-110428T1615Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1145 AM EDT THU APR 28 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN MORRIS COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 1215 PM EDT

* AT 1141 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR DOVER...OR
  7 MILES NORTHWEST OF MORRISTOWN...MOVING NORTHEAST AT 55 MPH.

* THE TORNADO WILL BE NEAR...
  GREEN POND BY 1150 AM EDT...
  KINNELON...BUTLER...RIVERDALE AND PEQUANNOCK TOWNSHIP BY 1155 AM
  EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
DAMAGING STRAIGHT LINE WINDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 PM EDT
THURSDAY AFTERNOON FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4082 7453 4091 7464 4104 7450 4105 7447
      4105 7444 4102 7442 4101 7435 4099 7429
      4096 7427
TIME...MOT...LOC 1544Z 225DEG 50KT 4091 7450

$$

GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 6:12 AM EDT	Special Weather Statement	PHI	Gloucester, Salem	63 min
Apr 28, 6:56 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	34 min
Apr 28, 7:35 AM EDT	Special Weather Statement	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more	55 min
Apr 28, 9:00 AM EDT	Special Weather Statement	PHI	Monmouth	60 min
Apr 28, 9:02 AM EDT	Special Marine Warning	PHI		26 min
Apr 28, 10:10 AM EDT	Gale Warning	PHI		5 hr
Apr 28, 10:25 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	50 min
Apr 28, 10:48 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Sussex, Warren	3 hr
Apr 28, 10:57 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Somerset, Warren	63 min
Apr 28, 10:58 AM EDT	Tornado Warning	PHI	Hunterdon, Warren	32 min
Apr 28, 11:11 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	64 min
Apr 28, 11:15 AM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex, Morris, Somerset	4 hr
Apr 28, 11:22 AM EDT	Tornado Warning	PHI	Hunterdon, Morris, Sussex, Warren	23 min
Apr 28, 12:06 PM EDT	Special Marine Warning	PHI		43 min
Apr 28, 12:29 PM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	61 min
Apr 28, 12:34 PM EDT	Special Weather Statement	PHI	Cumberland	56 min
Apr 28, 12:38 PM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset	52 min
Apr 28, 12:42 PM EDT	Special Weather Statement	PHI	Gloucester, Salem	63 min
Apr 28, 1:13 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May	62 min
Apr 28, 1:23 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	103 min
Apr 28, 1:44 PM EDT	Special Marine Warning	PHI		91 min
Apr 28, 2:02 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester	41 min
Apr 28, 2:11 PM EDT	Areal Flood Advisory	PHI	Burlington, Monmouth, Ocean	94 min
Apr 28, 2:27 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	41 min
Apr 28, 2:42 PM EDT	Special Marine Warning	PHI		63 min
Apr 28, 2:55 PM EDT	Special Weather Statement	PHI	Monmouth	65 min
Apr 28, 5:04 PM EDT	Special Weather Statement	PHI	Cape May	56 min
Apr 28, 6:03 PM EDT	Special Marine Warning	PHI		57 min
Apr 28, 6:22 PM EDT	Special Weather Statement	PHI	Cape May	53 min
Apr 28, 6:37 PM EDT	Special Marine Warning	PHI		53 min

Nearby

Tornado Warnings in New Jersey, 2011 Every tornado warning in 2011 Tornadoes 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.