Alert archive / New Jersey / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 111, NWS Philadelphia/Mount Holly

July 25, 2010Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 25, 2010, 1:59 PM EDT for Morris County, New Jersey. It was in force for 61 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: Jul 25, 2010, 1:59 PM EDT (17:59 UTC)
Expired: Jul 25, 2010, 3:00 PM EDT
In force: 61 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Morris County, NJ

The radar

The Philadelphia radar (KDIX), 109 km from the middle of the area, began a volume at 18:01 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
Jul 25, 2:42 PM EDT	TSTM WND DMG	Morris Plains, NJ	TREE ON VEHICLE

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
Jul 25, 11:29 AM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.0 hours before the alert went out and 130 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: 45 J/kg
Mixed-layer CIN: -339 J/kg
Mixed-layer LCL: 1287 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: 34 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.

234 
WUUS51 KPHI 251759
SVRPHI
NJC027-251900-
/O.NEW.KPHI.SV.W.0111.100725T1759Z-100725T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
159 PM EDT SUN JUL 25 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN MORRIS COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 300 PM EDT

* AT 154 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 11 MILES NORTHWEST OF GREEN
  POND...OR NEAR NEWTON...AND MOVING SOUTHEAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  GREEN POND AROUND 205 PM EDT...
  LAKE TELEMARK AND ROCKAWAY AROUND 210 PM EDT...
  BOONTON...MOUNTAIN LAKES AND PARSIPPANY AROUND 215 PM EDT...
  EAST HANOVER AND FLORHAM PARK AROUND 220 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT SUNDAY
EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND NEW JERSEY
AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4089 7433 4086 7431 4078 7437 4075 7436
      4072 7438 4094 7464 4096 7464 4108 7451
      4104 7449 4105 7444 4102 7442 4100 7432
      4097 7427 4090 7427
TIME...MOT...LOC 1758Z 315DEG 44KT 4106 7462

$$

 
GIGI

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 11:26 PM EDT	Special Weather Statement	PHI	Hunterdon	49 min
Jul 25, 12:09 AM EDT	Special Weather Statement	PHI	Somerset	66 min
Jul 25, 1:33 PM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	87 min
Jul 25, 1:48 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	42 min
Jul 25, 2:14 PM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	2 hr
Jul 25, 2:25 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	80 min
Jul 25, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Somerset, Warren	64 min
Jul 25, 2:45 PM EDT	Tornado Warning	PHI	Gloucester, Salem	30 min
Jul 25, 3:10 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	80 min
Jul 25, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Gloucester	57 min
Jul 25, 3:27 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	93 min
Jul 25, 3:28 PM EDT	Special Marine Warning	PHI		2 hr
Jul 25, 3:32 PM EDT	Special Marine Warning	PHI		118 min
Jul 25, 3:40 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Ocean	79 min
Jul 25, 4:02 PM EDT	Special Marine Warning	PHI		118 min
Jul 25, 4:11 PM EDT	Tornado Warning	PHI	Atlantic, Cape May, Cumberland	34 min
Jul 25, 5:19 PM EDT	Special Weather Statement	PHI	Cape May	56 min
Jul 25, 5:53 PM EDT	Special Marine Warning	PHI		67 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2010 Every severe thunderstorm warning in 2010

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.