Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 26, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 29, 2017, 4:32 AM EDT for 6 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 43 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
- Apr 29, 2017, 4:32 AM EDT (08:32 UTC)
- Expired
- Apr 29, 2017, 5:15 AM EDT
- In force
- 43 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 08:31 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, 8.5 hours before the alert went out and 131 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1920 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 215 m²/s²
- 0-3 km storm-relative helicity
- 229 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
545
WUUS51 KPHI 290832
SVRPHI
NJC019-021-023-025-027-035-PAC017-290915-
/O.NEW.KPHI.SV.W.0026.170429T0832Z-170429T0915Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
432 AM EDT SAT APR 29 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Southeastern Morris County in northern New Jersey...
Hunterdon County in northwestern New Jersey...
Northwestern Mercer County in central New Jersey...
Somerset County in northern New Jersey...
Northeastern Monmouth County in central New Jersey...
Middlesex County in northern New Jersey...
Central Bucks County in southeastern Pennsylvania...
* Until 515 AM EDT
* At 432 AM EDT, a severe thunderstorm was located over Cloverhill,
or 12 miles southwest of Somerville, moving east at 55 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
New Brunswick, Perth Amboy, Morristown, Somerville, Sandy Hook,
Somerset, Edison, Old Bridge, East Brunswick, Bridgewater, South
Brunswick, Sayreville, North Brunswick, Carteret, Madison,
Middlesex, Princeton, Florham Park, East Hanover and Bound Brook.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
In addition to large hail and damaging winds...frequent cloud to
ground lightning is occurring with this storm. Move indoors
immediately. Remember...if you can hear thunder...you are close
enough to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4028 7501 4053 7511 4091 7431 4089 7434
4086 7433 4079 7437 4075 7436 4067 7446
4065 7441 4060 7446 4060 7421 4056 7421
4055 7425 4050 7428 4046 7426 4044 7410
4046 7401 4047 7401 4044 7398
TIME...MOT...LOC 0832Z 257DEG 49KT 4045 7480
HAIL...1.00IN
WIND...60MPH
$$
SFJ2 follow-up statements
540
WWUS51 KPHI 290857
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
457 AM EDT SAT APR 29 2017
PAC017-290906-
/O.CAN.KPHI.SV.W.0026.000000T0000Z-170429T0915Z/
Bucks PA-
457 AM EDT SAT APR 29 2017
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BUCKS COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4031 7485 4070 7476 4091 7431 4089 7434
4086 7433 4079 7437 4075 7436 4067 7446
4065 7441 4060 7446 4060 7421 4056 7421
4055 7425 4050 7428 4046 7426 4044 7410
4046 7401 4047 7401 4044 7398
TIME...MOT...LOC 0856Z 257DEG 49KT 4053 7437
$$
NJC019-021-023-025-027-035-290915-
/O.CON.KPHI.SV.W.0026.000000T0000Z-170429T0915Z/
Morris NJ-Hunterdon NJ-Mercer NJ-Somerset NJ-Monmouth NJ-
Middlesex NJ-
457 AM EDT SAT APR 29 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM EDT
FOR SOUTHEASTERN MORRIS...SOUTHEASTERN HUNTERDON...NORTHWESTERN
MERCER...SOMERSET...NORTHEASTERN MONMOUTH AND MIDDLESEX COUNTIES...
At 456 AM EDT, a severe thunderstorm was located over Edison, or near
New Brunswick, moving east at 55 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
New Brunswick, Perth Amboy, Morristown, Somerville, Sandy Hook,
Somerset, Edison, Old Bridge, East Brunswick, Bridgewater, South
Brunswick, Sayreville, North Brunswick, Carteret, Madison, Middlesex,
Princeton, Florham Park, East Hanover and Bound Brook.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4031 7485 4070 7476 4091 7431 4089 7434
4086 7433 4079 7437 4075 7436 4067 7446
4065 7441 4060 7446 4060 7421 4056 7421
4055 7425 4050 7428 4046 7426 4044 7410
4046 7401 4047 7401 4044 7398
TIME...MOT...LOC 0856Z 257DEG 49KT 4053 7437
HAIL...1.00IN
WIND...60MPH
$$
SFJ339
WWUS51 KPHI 290907
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
507 AM EDT SAT APR 29 2017
NJC019-021-023-025-027-035-290917-
/O.EXP.KPHI.SV.W.0026.000000T0000Z-170429T0915Z/
Morris NJ-Hunterdon NJ-Mercer NJ-Somerset NJ-Monmouth NJ-
Middlesex NJ-
507 AM EDT SAT APR 29 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MORRIS...
SOUTHEASTERN HUNTERDON...NORTHWESTERN MERCER...SOMERSET...
NORTHEASTERN MONMOUTH AND MIDDLESEX COUNTIES WILL EXPIRE AT 515 AM
EDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.
LAT...LON 4031 7485 4070 7476 4091 7431 4089 7434
4086 7433 4079 7437 4075 7436 4067 7446
4065 7441 4060 7446 4060 7421 4056 7421
4055 7425 4050 7428 4046 7426 4044 7410
4046 7401 4047 7401 4044 7398
TIME...MOT...LOC 0907Z 257DEG 49KT 4056 7422
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 2:54 AM EDT | Special Weather Statement | PHI | Burlington | 36 min |
| Apr 29, 4:14 AM EDT | Special Weather Statement | PHI | Hunterdon, Middlesex, Somerset | 46 min |
| Apr 29, 4:20 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 40 min |
| Apr 29, 4:22 AM EDT | Special Weather Statement | PHI | Burlington, Camden, Gloucester | 38 min |
| Apr 29, 4:29 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 4 hr |
| Apr 29, 4:56 AM EDT | Special Marine Warning | PHI | 64 min | |
| Apr 29, 4:56 AM EDT | Special Weather Statement | PHI | Burlington, Mercer, Monmouth, Ocean | 49 min |
| Apr 29, 5:16 AM EDT | Special Marine Warning | PHI | 29 min | |
| Apr 29, 6:16 AM EDT | Special Marine Warning | PHI | 29 min | |
| Apr 29, 7:04 AM EDT | Areal Flood Warning | PHI | Hunterdon, Somerset | 4 hr |
| Apr 29, 3:12 AM EDT | Areal Flood Advisory | PHI | Berks | 4 hr |
| Apr 29, 3:20 AM EDT | Special Weather Statement | PHI | Berks, Lehigh, Northampton | 40 min |
| Apr 29, 3:51 AM EDT | Special Weather Statement | PHI | Berks, Bucks, Chester, Delaware, Montgomery | 39 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2017Severe Thunderstorm Warnings in Pennsylvania, 2017Every severe thunderstorm warning in 2017
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.