Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 78, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2017, 5:35 PM EDT for 5 counties in New Jersey; 4 counties in Pennsylvania. It was in force for 40 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
- Jul 1, 2017, 5:35 PM EDT (21:35 UTC)
- Expired
- Jul 1, 2017, 6:15 PM EDT
- In force
- 40 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Mercer County, NJ, Salem County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 66 km from the middle of the area, began a volume at 21:34 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 1, 5:39 PM EDT | TSTM WND DMG | Abington, PA | SEVERAL TREES AND POWER LINES DOWN IN ABINGTON. TIME ESTIMATED FROM RADAR. |
| Jul 1, 6:08 PM EDT | TSTM WND DMG | 1 W White Horse, NJ | LARGE TREE FELL ON LAKE AVE. TREE DAMAGED TWO CARS AND JET SKIS. |
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 1, 1:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.6 hours before the alert went out and 217 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
- 160 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 564 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
581
WUUS51 KPHI 012135
SVRPHI
NJC005-007-015-021-033-PAC017-045-091-101-012215-
/O.NEW.KPHI.SV.W.0078.170701T2135Z-170701T2215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
535 PM EDT SAT JUL 1 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Salem County in southern New Jersey...
Camden County in southern New Jersey...
Southwestern Mercer County in central New Jersey...
Gloucester County in southern New Jersey...
Northwestern Burlington County in southern New Jersey...
Southeastern Montgomery County in southeastern Pennsylvania...
Southeastern Bucks County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
Eastern Delaware County in southeastern Pennsylvania...
* Until 615 PM EDT
* At 535 PM EDT, severe thunderstorms were located along a line
extending from near Doylestown to near Gibbstown, moving east at 20
mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Philadelphia, Trenton, Camden, Gloucester City, Cherry Hill,
Bensalem, Evesham, Mount Laurel, Ewing, Chester, Willingboro,
Deptford, Voorhees, West Deptford, Glassboro, Lindenwold,
Lumberton, Florence, Bellmawr and Yeadon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3965 7495 3974 7547 3977 7545 3979 7541
3981 7543 4035 7517 4028 7461
TIME...MOT...LOC 2135Z 267DEG 18KT 4029 7508 3981 7533
HAIL...0.75IN
WIND...60MPH
$$
SFJ2 follow-up statements
520 WWUS51 KPHI 012157 SVSPHI Severe Weather Statement National Weather Service Mount Holly NJ 557 PM EDT SAT JUL 1 2017 NJC033-012207- /O.CAN.KPHI.SV.W.0078.000000T0000Z-170701T2215Z/ Salem NJ- 557 PM EDT SAT JUL 1 2017 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SALEM COUNTY IS CANCELLED... The storms which prompted the warning have moved out of the warned area. Therefore, the warning has been cancelled. A severe thunderstorm watch remains in effect until 900 PM EDT for southern and central New Jersey...and southeastern Pennsylvania. LAT...LON 3965 7495 3978 7539 4033 7501 4028 7461 TIME...MOT...LOC 2157Z 273DEG 23KT 4025 7485 3982 7520 $$ NJC005-007-015-021-PAC017-045-091-101-012215- /O.CON.KPHI.SV.W.0078.000000T0000Z-170701T2215Z/ Camden NJ-Mercer NJ-Gloucester NJ-Burlington NJ-Montgomery PA- Bucks PA-Philadelphia PA-Delaware PA- 557 PM EDT SAT JUL 1 2017 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR CAMDEN...SOUTHWESTERN MERCER...NORTHERN GLOUCESTER...NORTHWESTERN BURLINGTON...SOUTHEASTERN MONTGOMERY...SOUTHEASTERN BUCKS... PHILADELPHIA AND SOUTHEASTERN DELAWARE COUNTIES... At 557 PM EDT, severe thunderstorms were located along a line extending from Yardley to West Deptford, moving east at 25 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. Locations impacted include... Philadelphia, Trenton, Camden, Gloucester City, Cherry Hill, Bensalem, Evesham, Mount Laurel, Ewing, Willingboro, Deptford, Voorhees, West Deptford, Glassboro, Lindenwold, Lumberton, Florence, Bellmawr, Yeadon and Woodbury. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 3965 7495 3978 7539 4033 7501 4028 7461 TIME...MOT...LOC 2157Z 273DEG 23KT 4025 7485 3982 7520 HAIL...0.75IN WIND...60MPH $$ SFJ
504
WWUS51 KPHI 012208
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
608 PM EDT SAT JUL 1 2017
NJC005-007-015-021-PAC017-045-091-101-012217-
/O.EXP.KPHI.SV.W.0078.000000T0000Z-170701T2215Z/
Camden NJ-Mercer NJ-Gloucester NJ-Burlington NJ-Montgomery PA-
Bucks PA-Philadelphia PA-Delaware PA-
608 PM EDT SAT JUL 1 2017
...THE SEVERE THUNDERSTORM WARNING FOR CAMDEN...SOUTHWESTERN
MERCER...NORTHERN GLOUCESTER...NORTHWESTERN BURLINGTON...SOUTHEASTERN
MONTGOMERY...SOUTHEASTERN BUCKS...PHILADELPHIA AND SOUTHEASTERN
DELAWARE COUNTIES WILL EXPIRE AT 615 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire. However gusty winds
are still possible with these thunderstorms.
A severe thunderstorm watch remains in effect until 900 PM EDT for
southern and central New Jersey...and southeastern Pennsylvania.
LAT...LON 3965 7495 3978 7539 4033 7501 4028 7461
TIME...MOT...LOC 2207Z 270DEG 18KT 4025 7479 3982 7514
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 9:48 PM EDT | Special Weather Statement | PHI | Middlesex | 42 min |
| Jun 30, 9:55 PM EDT | Special Weather Statement | PHI | Middlesex | 20 min |
| Jun 30, 10:32 PM EDT | Special Weather Statement | PHI | Middlesex | 28 min |
| Jul 1, 9:48 AM EDT | Marine Dense Fog Advisory | PHI | 5 hr | |
| Jul 1, 4:24 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 51 min |
| Jul 1, 5:00 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Warren | 4 hr |
| Jul 1, 5:01 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester, Salem | 44 min |
| Jul 1, 5:08 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Morris, Somerset, Warren | 52 min |
| Jul 1, 5:10 PM EDT | Special Marine Warning | PHI | 95 min | |
| Jul 1, 5:29 PM EDT | Special Weather Statement | PHI | Sussex | 31 min |
| Jul 1, 5:30 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester | 4 hr |
| Jul 1, 5:41 PM EDT | Special Weather Statement | PHI | Atlantic, Cape May, Cumberland, Salem | 34 min |
| Jul 1, 5:50 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 40 min |
| Jul 1, 6:07 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Gloucester, Mercer | 23 min |
| Jul 1, 6:17 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 4 hr |
| Jul 1, 6:22 PM EDT | Special Weather Statement | PHI | Middlesex, Monmouth, Morris | 23 min |
| Jul 1, 6:33 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Cumberland, Gloucester | 27 min |
| Jul 1, 6:59 PM EDT | Special Marine Warning | PHI | 61 min | |
| Jul 1, 7:01 PM EDT | Special Weather Statement | PHI | Atlantic, Burlington, Ocean | 29 min |
| Jun 30, 8:09 PM EDT | Special Weather Statement | PHI | Montgomery | 51 min |
| Jun 30, 8:32 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Lehigh, Montgomery | 118 min |
| Jun 30, 9:17 PM EDT | Special Weather Statement | PHI | Bucks | 43 min |
| Jul 1, 2:38 PM EDT | Special Weather Statement | PHI | Berks | 52 min |
| Jul 1, 3:22 PM EDT | Special Weather Statement | PHI | Berks, Carbon | 23 min |
| Jul 1, 3:24 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 3 hr |
| Jul 1, 3:41 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Northampton | 49 min |
| Jul 1, 4:05 PM EDT | Special Weather Statement | PHI | Chester | 40 min |
| Jul 1, 4:20 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 4 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.