Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 170, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 5, 2012, 6:16 PM EDT for 9 counties in New Jersey; 4 counties in Pennsylvania. It was in force for 74 min. 2 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
- Aug 5, 2012, 6:16 PM EDT (22:16 UTC)
- Expired
- Aug 5, 2012, 7:30 PM EDT
- In force
- 74 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 45 km from the middle of the area, began a volume at 22:17 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 |
|---|---|---|---|
| Aug 5, 6:46 PM EDT | HAIL 0.5 | Feasterville, PA | |
| Aug 5, 7:00 PM EDT | TSTM WND DMG | Dunellen, NJ | LARGE TREE LIMBS DOWN IN DUNELLEN. |
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 |
|---|---|---|---|
| Aug 5, 3:36 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.3 hours before the alert went out and 166 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.
- Mixed-layer CAPE
- 2201 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 477 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
256
WUUS51 KPHI 052216
SVRPHI
NJC005-007-015-019-021-023-025-027-035-PAC017-045-091-101-052330-
/O.NEW.KPHI.SV.W.0170.120805T2216Z-120805T2330Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
616 PM EDT SUN AUG 5 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MERCER COUNTY IN CENTRAL NEW JERSEY...
THIS INCLUDES THE CITY OF TRENTON...
SOUTHWESTERN MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF NEW BRUNSWICK...
SOUTHERN MORRIS COUNTY IN NORTHERN NEW JERSEY...
SOMERSET COUNTY IN NORTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF SOMERVILLE...
HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
EASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
EASTERN DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF PHILADELPHIA...
WESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
THIS INCLUDES THE CITY OF CAMDEN...
NORTHERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
* UNTIL 730 PM EDT
* AT 613 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM NEAR PHILIPSBURG TO NEAR
DOYLESTOWN TO KING OF PRUSSIA TO NEAR WILMINGTON...AND MOVING EAST
AT 30 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
GARDENVILLE...ERWINNA...HAMPTON AND TINICUM TOWNSHIP AROUND 620 PM
EDT...
MORRIS PARK...LUMBERVILLE...CHESTNUT HILL AND BYRAM AROUND 625 PM
EDT...
CALIFON AND ROXBOROUGH AROUND 630 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY
EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3972 7472 3973 7474 3969 7479 3971 7536
3976 7541 4069 7501 4079 7488 4076 7436
4072 7438 4067 7445 4067 7440 4061 7443
4062 7431 4060 7429
TIME...MOT...LOC 2214Z 278DEG 28KT 4073 7502 3973 7551
$$
IOVINO1 follow-up statement
681
WWUS51 KPHI 052249
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
649 PM EDT SUN AUG 5 2012
PAC045-091-052256-
/O.CAN.KPHI.SV.W.0170.000000T0000Z-120805T2330Z/
MONTGOMERY PA-DELAWARE PA-
649 PM EDT SUN AUG 5 2012
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN DELAWARE AND
SOUTHEASTERN MONTGOMERY COUNTIES IS CANCELLED...
THE SEVERE THUNDERSTORMS HAVE MOVED TO THE EAST OF MONTGOMERY COUNTY
AND DELAWARE COUNTY.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY
EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND SOUTHEAST PENNSYLVANIA.
LAT...LON 3972 7472 3973 7475 3969 7479 3971 7527
4005 7512 4006 7509 4014 7501 4017 7507
4079 7478 4076 7436 4072 7438 4067 7445
4067 7440 4061 7443 4062 7431 4060 7429
TIME...MOT...LOC 2246Z 278DEG 28KT 4069 7469 3970 7519
$$
NJC005-007-015-019-021-023-025-027-035-PAC017-101-052330-
/O.CON.KPHI.SV.W.0170.000000T0000Z-120805T2330Z/
CAMDEN NJ-HUNTERDON NJ-MERCER NJ-MORRIS NJ-SOMERSET NJ-BUCKS PA-
PHILADELPHIA PA-GLOUCESTER NJ-MIDDLESEX NJ-BURLINGTON NJ-MONMOUTH NJ-
649 PM EDT SUN AUG 5 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR SOUTHWESTERN MONMOUTH...WESTERN BURLINGTON...WESTERN MIDDLESEX...
CENTRAL GLOUCESTER...EASTERN PHILADELPHIA...SOUTHEASTERN BUCKS...
SOMERSET...SOUTHERN MORRIS...MERCER...EASTERN HUNTERDON AND CAMDEN
COUNTIES...
AT 643 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM NEAR BRIDGEWATER TO NEAR
TRENTON TO NORTHEAST PHILADEPHIA TO MULLICA HILL...MOVING EAST AT 30
MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
FAR HILLS...BERNARDSVILLE...SKILLMAN AND FLAGTOWN BY 655 PM EDT...
BASKING RIDGE...VOORHEES...SPRINGDALE AND MOUNT LAUREL BY 700 PM
EDT...
MILLINGTON AND WESTAMPTON BY 705 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.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT.
&&
LAT...LON 3972 7472 3973 7475 3969 7479 3971 7527
4005 7512 4006 7509 4014 7501 4017 7507
4079 7478 4076 7436 4072 7438 4067 7445
4067 7440 4061 7443 4062 7431 4060 7429
TIME...MOT...LOC 2246Z 278DEG 28KT 4069 7469 3970 7519
$$
IOVINOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 3:49 AM EDT | Flash Flood Watch | PHI | Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren | 16 hr |
| Aug 5, 1:00 PM EDT | Special Weather Statement | PHI | Warren | 30 min |
| Aug 5, 1:20 PM EDT | Special Weather Statement | PHI | Sussex | 85 min |
| Aug 5, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 77 min |
| Aug 5, 5:22 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Hunterdon, Salem, Warren | 68 min |
| Aug 5, 5:38 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 82 min |
| Aug 5, 5:52 PM EDT | Special Marine Warning | PHI | 83 min | |
| Aug 5, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 39 min |
| Aug 5, 7:09 PM EDT | Special Weather Statement | PHI | Atlantic, Cumberland | 66 min |
| Aug 5, 7:30 PM EDT | Special Weather Statement | PHI | Atlantic, Cumberland, Monmouth, Ocean | 60 min |
| Aug 5, 7:38 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth, Ocean | 67 min |
| Aug 5, 7:40 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 5, 12:15 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 45 min |
| Aug 5, 12:29 PM EDT | Special Weather Statement | PHI | Northampton | 31 min |
| Aug 5, 1:03 PM EDT | Special Weather Statement | PHI | Monroe | 27 min |
| Aug 5, 4:12 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 78 min |
| Aug 5, 4:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 67 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2012Severe Thunderstorm Warnings in Pennsylvania, 2012Every severe thunderstorm warning in 2012
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.