Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 82, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 2011, 4:15 PM EDT for 5 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 45 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
- Jun 1, 2011, 4:15 PM EDT (20:15 UTC)
- Expired
- Jun 1, 2011, 5:00 PM EDT
- In force
- 45 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Somerset County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 44 km from the middle of the area, began a volume at 20:16 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 |
|---|---|---|---|
| Jun 1, 4:25 PM EDT | HAIL 1 | Upper Makefield Twp, PA |
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 |
|---|---|---|---|
| Jun 1, 12:58 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.3 hours before the alert went out and 159 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
- 2843 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1042 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 319 m²/s²
- 0-3 km storm-relative helicity
- 336 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
503
WUUS51 KPHI 012015
SVRPHI
NJC019-021-023-025-035-PAC017-012100-
/O.NEW.KPHI.SV.W.0082.110601T2015Z-110601T2100Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
415 PM EDT WED JUN 1 2011
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...
WEST CENTRAL MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
SOUTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
SOUTHWESTERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
EXTREME SOUTH CENTRAL HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 500 PM EDT
* AT 412 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
RICHBORO...OR 13 MILES WEST OF TRENTON...AND MOVING EAST AT 35 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
YARDLEY AND WOODSIDE AROUND 425 PM EDT...
EWING AND PENNINGTON AROUND 430 PM EDT...
LAWRENCEVILLE AND TRENTON AROUND 435 PM EDT...
MERCERVILLE-HAMILTON SQUARE AROUND 440 PM EDT...
EDINBURG AND PRINCETON AROUND 445 PM EDT...
WINDSOR AROUND 450 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 4027 7441 4025 7448 4023 7449 4021 7455
4019 7456 4018 7508 4036 7510 4040 7474
4040 7470 4041 7466 4041 7462 4041 7458
4044 7433 4034 7432
TIME...MOT...LOC 2015Z 265DEG 30KT 4028 7496
$$
MPD1 follow-up statement
600
WWUS51 KPHI 012050
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
450 PM EDT WED JUN 1 2011
NJC019-PAC017-012059-
/O.CAN.KPHI.SV.W.0082.000000T0000Z-110601T2100Z/
HUNTERDON NJ-BUCKS PA-
450 PM EDT WED JUN 1 2011
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BUCKS AND EXTREME
SOUTH CENTRAL HUNTERDON COUNTIES IS CANCELLED...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NEW JERSEY AND EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY.
LAT...LON 4027 7441 4025 7448 4023 7449 4025 7457
4031 7473 4040 7474 4040 7470 4041 7466
4041 7458 4044 7433 4034 7432
TIME...MOT...LOC 2049Z 255DEG 35KT 4037 7458
$$
NJC021-023-025-035-012100-
/O.CON.KPHI.SV.W.0082.000000T0000Z-110601T2100Z/
SOMERSET NJ-MERCER NJ-MIDDLESEX NJ-MONMOUTH NJ-
450 PM EDT WED JUN 1 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR CENTRAL MONMOUTH...SOUTHERN MIDDLESEX...NORTHEASTERN MERCER AND
EXTREME SOUTHWESTERN SOMERSET COUNTIES...
AT 441 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR
PRINCETON...OR 10 MILES NORTHEAST OF TRENTON...MOVING EAST AT 35
MPH. THE STORM IS CAPABLE OF PRODUCING QUARTER SIZED HAIL.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
HIGHTSTOWN...KENDALL PARK...MONMOUTH JUNCTION...SOUTH BRUNSWICK...
TWIN RIVERS...DAYTON...ROSSMOOR...CLEARBROOK PARK...CONCORDIA...
JAMESBURG...SPOTSWOOD...OLD BRIDGE...HELMETTA AND EAST BRUNSWICK
A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NEW JERSEY AND EASTERN PENNSYLVANIA. A SEVERE THUNDERSTORM WATCH
ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY.
LAT...LON 4027 7441 4025 7448 4023 7449 4025 7457
4031 7473 4040 7474 4040 7470 4041 7466
4041 7458 4044 7433 4034 7432
TIME...MOT...LOC 2049Z 255DEG 35KT 4037 7458
$$
ROBERTSONThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 1:57 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 63 min |
| Jun 1, 3:08 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 16 min |
| Jun 1, 3:26 PM EDT | Special Weather Statement | PHI | Sussex | 64 min |
| Jun 1, 4:00 PM EDT | Small Craft Advisory | PHI | 35 hr | |
| Jun 1, 4:05 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 40 min |
| Jun 1, 4:31 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 59 min |
| Jun 1, 4:59 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 61 min |
| Jun 1, 5:23 PM EDT | Special Weather Statement | PHI | Salem | 67 min |
| Jun 1, 5:50 PM EDT | Special Marine Warning | PHI | 40 min | |
| Jun 1, 6:11 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 64 min |
| Jun 1, 6:42 PM EDT | Special Marine Warning | PHI | 63 min | |
| Jun 1, 7:22 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 43 min |
| Jun 1, 12:56 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 60 min |
| Jun 1, 2:42 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Lehigh | 52 min |
| Jun 1, 4:55 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 26 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2011Severe Thunderstorm Warnings in Pennsylvania, 2011Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.