Alert archive / New Jersey / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 191, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 23, 2017, 12:29 AM EDT for 4 counties in New Jersey; Philadelphia County, Pennsylvania. It was in force for 46 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
- Aug 23, 2017, 12:29 AM EDT (04:29 UTC)
- Expired
- Aug 23, 2017, 1:15 AM EDT
- In force
- 46 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, Ocean County, NJ, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 46 km from the middle of the area, began a volume at 04:30 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 4.5 hours before the alert went out and 209 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
- 1036 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 890 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.0
The text
As transmitted.
497
WUUS51 KPHI 230429
SVRPHI
NJC005-007-015-029-PAC101-230515-
/O.NEW.KPHI.SV.W.0191.170823T0429Z-170823T0515Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1229 AM EDT WED AUG 23 2017
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Ocean County in southern New Jersey...
Camden County in southern New Jersey...
Northeastern Gloucester County in southern New Jersey...
Burlington County in southern New Jersey...
Southwestern Philadelphia County in southeastern Pennsylvania...
* Until 115 AM EDT
* At 1229 AM EDT, a severe thunderstorm was located over Woodbury
Heights, or near Gloucester City, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Philadelphia, Camden, Gloucester City, Cherry Hill, Evesham, Mount
Laurel, Deptford, Voorhees, Medford, West Deptford, Glassboro,
Lindenwold, Hammonton, Lumberton, Bellmawr, Woodbury, Pitman,
Clayton, Berlin and Tabernacle.
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 3962 7442 3964 7466 3969 7467 3973 7473
3965 7483 3969 7530 3985 7531 3985 7525
3987 7521 3988 7526 3992 7524 4004 7441
TIME...MOT...LOC 0429Z 268DEG 39KT 3980 7513
HAIL...<.75IN
WIND...60MPH
$$
CMS2 follow-up statements
500
WWUS51 KPHI 230450
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1250 AM EDT WED AUG 23 2017
PAC101-230500-
/O.CAN.KPHI.SV.W.0191.000000T0000Z-170823T0515Z/
Philadelphia PA-
1250 AM EDT WED AUG 23 2017
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PHILADELPHIA
COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3973 7521 3994 7508 4004 7441 3968 7442
3970 7468 3973 7473 3970 7476
TIME...MOT...LOC 0450Z 262DEG 31KT 3981 7494
$$
NJC005-007-015-029-230515-
/O.CON.KPHI.SV.W.0191.000000T0000Z-170823T0515Z/
Ocean NJ-Camden NJ-Gloucester NJ-Burlington NJ-
1250 AM EDT WED AUG 23 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM EDT
FOR NORTHWESTERN OCEAN...CAMDEN...NORTHEASTERN GLOUCESTER AND CENTRAL
BURLINGTON COUNTIES...
At 1250 AM EDT, a severe thunderstorm was located over Berlin, or 10
miles southeast of Gloucester City, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Camden, Gloucester City, Cherry Hill, Evesham, Mount Laurel,
Voorhees, Medford, Glassboro, Lindenwold, Hammonton, Lumberton,
Bellmawr, Woodbury, Pitman, Berlin, Tabernacle, Shamong, Magnolia,
Westville and Woodbury Heights.
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 3973 7521 3994 7508 4004 7441 3968 7442
3970 7468 3973 7473 3970 7476
TIME...MOT...LOC 0450Z 262DEG 31KT 3981 7494
HAIL...<.75IN
WIND...60MPH
$$
CMS850
WWUS51 KPHI 230508
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
108 AM EDT WED AUG 23 2017
NJC005-007-015-029-230518-
/O.EXP.KPHI.SV.W.0191.000000T0000Z-170823T0515Z/
Ocean NJ-Camden NJ-Gloucester NJ-Burlington NJ-
108 AM EDT WED AUG 23 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN OCEAN...CAMDEN...
NORTHEASTERN GLOUCESTER AND CENTRAL BURLINGTON COUNTIES WILL EXPIRE
AT 115 AM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire. However gusty winds
and heavy rain are still possible with this thunderstorm.
LAT...LON 3973 7521 3994 7508 4004 7441 3968 7442
3970 7468 3973 7473 3970 7476
TIME...MOT...LOC 0508Z 268DEG 39KT 3982 7469
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 8:12 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 48 min |
| Aug 22, 8:15 PM EDT | Tornado Warning | PHI | Warren | 30 min |
| Aug 22, 8:20 PM EDT | Special Weather Statement | PHI | Sussex | 40 min |
| Aug 22, 8:45 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset, Warren | 60 min |
| Aug 22, 8:58 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 24 min |
| Aug 22, 9:42 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Warren | 48 min |
| Aug 22, 10:07 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 53 min |
| Aug 22, 10:13 PM EDT | Special Marine Warning | PHI | 92 min | |
| Aug 22, 10:27 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 48 min |
| Aug 22, 10:37 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 4 hr |
| Aug 22, 10:40 PM EDT | Areal Flood Advisory | PHI | Mercer | 4 hr |
| Aug 22, 10:58 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Cumberland, Gloucester, Mercer, Middlesex and 1 more | 62 min |
| Aug 22, 11:39 PM EDT | Special Marine Warning | PHI | 66 min | |
| Aug 22, 11:42 PM EDT | Flash Flood Warning | PHI | Hunterdon, Middlesex, Somerset | 4 hr |
| Aug 22, 11:46 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Ocean, Salem | 44 min |
| Aug 23, 12:06 AM EDT | Flash Flood Warning | PHI | Camden, Gloucester | 4 hr |
| Aug 23, 12:37 AM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Mercer, Middlesex, Monmouth and 1 more | 4 hr |
| Aug 23, 1:56 AM EDT | Areal Flood Advisory | PHI | Salem | 4 hr |
| Aug 23, 2:43 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Ocean and 1 more | 4 hr |
| Aug 23, 3:37 AM EDT | Areal Flood Warning | PHI | Hunterdon, Middlesex, Somerset | 4 hr |
| Aug 23, 4:02 AM EDT | Areal Flood Warning | PHI | Camden, Gloucester | 4 hr |
| Aug 22, 9:18 PM EDT | Areal Flood Advisory | PHI | Berks, Montgomery | 4 hr |
| Aug 22, 9:23 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 52 min |
| Aug 22, 9:40 PM EDT | Tornado Warning | PHI | Berks, Chester, Montgomery | 20 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.