Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 343, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 8, 2023, 10:17 PM EDT for Chester County, Delaware County, Philadelphia County, Pennsylvania; New Castle County, Delaware; Gloucester County, Salem County, New Jersey. It was in force for 43 min. 5 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
- Sep 8, 2023, 10:17 PM EDT (02:17 UTC)
- Expired
- Sep 8, 2023, 11:00 PM EDT
- In force
- 43 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 90 km from the middle of the area, began a volume at 02:18 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 |
|---|---|---|---|
| Sep 8, 10:23 PM EDT | HAIL 1 | Phillips Heights, DE | Quarter size hail reported at Marsh Road and Philadelphia Pike. Time estimated from radar. |
| Sep 8, 10:24 PM EDT | HAIL 0.25 | West Grove, PA | |
| Sep 8, 10:25 PM EDT | HAIL 1 | Phillips Heights, DE | Report from mPING: Quarter (1.00 in.). |
| Sep 8, 10:53 PM EDT | TSTM WND DMG | 1 Wnw Media, PA | Down trees or limbs in the Rosemary Circle area of Upper Providence Township resulting in several power outages. Time estimated from radar. |
| Sep 8, 10:55 PM EDT | TSTM WND GST 50 | Media, PA | Thunderstorm wind gust estimated to be 40 to 50 mph in Media. Pea size hail also reported. Time estimated from radar. |
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 |
|---|---|---|---|
| Sep 8, 3:11 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.3 hours before the alert went out and 224 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
- 1941 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 954 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
244
WUUS51 KPHI 090217
SVRPHI
DEC003-NJC015-033-PAC029-045-101-090300-
/O.NEW.KPHI.SV.W.0343.230909T0217Z-230909T0300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1017 PM EDT Fri Sep 8 2023
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern New Castle County in northern Delaware...
Northwestern Salem County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
Central Chester County in southeastern Pennsylvania...
Southwestern Philadelphia County in southeastern Pennsylvania...
Delaware County in southeastern Pennsylvania...
* Until 1100 PM EDT.
* At 1017 PM EDT, a severe thunderstorm was located over Greenville,
or near Wilmington, moving northeast at 15 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
* Locations impacted include...
Philadelphia, Wilmington, West Chester, Chester, Pennsville,
Coatesville, Yeadon, Westtown, Carneys Point, Downingtown,
Folcroft, Swarthmore, Elsmere, Paulsboro, Kennett Square, New
Castle, Penns Grove, National Park, West Grove and East Lansdowne.
This includes the following highways...
New Jersey Turnpike near exit 1.
Pennsylvania Turnpike between mile markers 305 and 318.
Interstate 95 in Pennsylvania between mile markers 0 and 15.
Interstate 95 in Delaware between mile markers 10 and 23.
Interstate 76 in Pennsylvania between mile markers 345 and 349.
Interstate 295 in New Jersey between mile markers 0 and 18.
Interstate 476 in Pennsylvania between mile markers 0 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4014 7578 3999 7528 3998 7527 3997 7525
3995 7514 3962 7539 3979 7588
TIME...MOT...LOC 0217Z 206DEG 11KT 3979 7562
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB3 follow-up statements
530
WWUS51 KPHI 090232
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1032 PM EDT Fri Sep 8 2023
DEC003-NJC015-033-PAC029-045-101-090300-
/O.CON.KPHI.SV.W.0343.000000T0000Z-230909T0300Z/
New Castle DE-Salem NJ-Gloucester NJ-Chester PA-Philadelphia PA-
Delaware PA-
1032 PM EDT Fri Sep 8 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT
FOR NORTHEASTERN NEW CASTLE...NORTHWESTERN SALEM...NORTHWESTERN
GLOUCESTER...SOUTHEASTERN CHESTER...SOUTHWESTERN PHILADELPHIA AND
DELAWARE COUNTIES...
At 1032 PM EDT, a severe thunderstorm was located over Talleyville,
or 7 miles northwest of Wilmington, moving northeast at 15 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Damage to roofs, siding, trees, and power lines is
possible.
Locations impacted include...
Philadelphia, Wilmington, West Chester, Chester, Yeadon, Westtown,
Carneys Point, Downingtown, Folcroft, Swarthmore, Paulsboro, Kennett
Square, Penns Grove, National Park, East Lansdowne, Swedesboro,
Arden, Darby Township, Cheyney and Talleyville.
This includes the following highways...
Pennsylvania Turnpike between mile markers 310 and 318.
Interstate 95 in Pennsylvania between mile markers 0 and 15.
Interstate 95 in Delaware between mile markers 14 and 23.
Interstate 76 in Pennsylvania between mile markers 345 and 349.
Interstate 295 in New Jersey between mile markers 4 and 18.
Interstate 476 in Pennsylvania between mile markers 0 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3999 7528 3998 7527 3997 7525 3995 7514
3967 7535 3982 7580 4012 7570
TIME...MOT...LOC 0232Z 206DEG 11KT 3983 7559
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB240
WWUS51 KPHI 090243
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1043 PM EDT Fri Sep 8 2023
DEC003-NJC015-033-PAC029-045-101-090300-
/O.CON.KPHI.SV.W.0343.000000T0000Z-230909T0300Z/
New Castle DE-Salem NJ-Gloucester NJ-Chester PA-Philadelphia PA-
Delaware PA-
1043 PM EDT Fri Sep 8 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM EDT
FOR NORTHEASTERN NEW CASTLE...NORTH CENTRAL SALEM...NORTHWESTERN
GLOUCESTER...SOUTHEASTERN CHESTER...SOUTHWESTERN PHILADELPHIA AND
DELAWARE COUNTIES...
At 1043 PM EDT, a severe thunderstorm was located over Gradyville, or
8 miles east of West Chester, moving northeast at 25 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Wind damage to roofs,
siding, trees, and power lines is possible.
Locations impacted include...
Philadelphia, Wilmington, West Chester, Chester, Yeadon, Westtown,
Carneys Point, Downingtown, Folcroft, Swarthmore, Paulsboro, Kennett
Square, Penns Grove, National Park, East Lansdowne, Swedesboro,
Arden, Darby Township, Cheyney and Talleyville.
This includes the following highways...
Pennsylvania Turnpike between mile markers 312 and 318.
Interstate 95 in Pennsylvania between mile markers 0 and 15.
Interstate 95 in Delaware between mile markers 16 and 23.
Interstate 76 in Pennsylvania between mile markers 345 and 349.
Interstate 295 in New Jersey between mile markers 5 and 18.
Interstate 476 in Pennsylvania between mile markers 0 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3999 7528 3998 7527 3997 7525 3995 7514
3967 7535 3986 7574 4011 7567
TIME...MOT...LOC 0243Z 214DEG 21KT 3996 7545
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB205
WWUS51 KPHI 090300
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
1100 PM EDT Fri Sep 8 2023
DEC003-NJC015-033-PAC029-045-101-090309-
/O.EXP.KPHI.SV.W.0343.000000T0000Z-230909T0300Z/
New Castle DE-Salem NJ-Gloucester NJ-Chester PA-Philadelphia PA-
Delaware PA-
1100 PM EDT Fri Sep 8 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEW CASTLE...
NORTH CENTRAL SALEM...NORTHWESTERN GLOUCESTER...SOUTHEASTERN
CHESTER...SOUTHWESTERN PHILADELPHIA AND DELAWARE COUNTIES WILL EXPIRE
AT 1100 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Gloucester, Chester, Philadelphia, and Delaware Counties
until 11:45 PM EDT.
LAT...LON 3999 7528 3998 7527 3997 7525 3995 7514
3967 7535 3986 7574 4011 7567
TIME...MOT...LOC 0259Z 206DEG 11KT 4000 7543
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 9:33 PM EDT | Special Weather Statement | PHI | Chester | 27 min |
| Sep 8, 9:48 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 42 min |
| Sep 8, 10:33 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| Sep 8, 10:58 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 47 min |
| Sep 8, 11:07 PM EDT | Special Weather Statement | PHI | Carbon | 53 min |
| Sep 9, 3:34 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 56 min |
| Sep 9, 4:05 PM EDT | Flash Flood Warning | PHI | Philadelphia | 4 hr |
| Sep 9, 4:15 PM EDT | Special Weather Statement | PHI | Bucks | 30 min |
| Sep 9, 4:29 PM EDT | Special Weather Statement | PHI | Philadelphia | 31 min |
| Sep 9, 4:57 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 49 min |
| Sep 9, 5:18 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 45 min |
| Sep 9, 5:36 PM EDT | Special Weather Statement | PHI | Berks | 24 min |
| Sep 9, 5:43 PM EDT | Special Weather Statement | PHI | Lehigh | 32 min |
| Sep 9, 6:38 PM EDT | Special Weather Statement | PHI | Chester | 37 min |
| Sep 9, 7:20 PM EDT | Special Weather Statement | PHI | Chester | 25 min |
| Sep 9, 7:24 PM EDT | Special Weather Statement | PHI | Berks | 36 min |
| Sep 9, 7:25 PM EDT | Special Weather Statement | PHI | Lehigh | 35 min |
| Sep 9, 7:56 PM EDT | Special Weather Statement | PHI | Berks | 64 min |
| Sep 9, 3:46 PM EDT | Special Weather Statement | PHI | Sussex | 29 min |
| Sep 9, 4:42 PM EDT | Special Weather Statement | PHI | Kent | 33 min |
| Sep 9, 4:47 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 43 min |
| Sep 9, 5:29 PM EDT | Special Weather Statement | PHI | Kent | 31 min |
| Sep 9, 12:56 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Ocean | 64 min |
| Sep 9, 12:57 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 50 min |
| Sep 9, 1:17 PM EDT | Special Weather Statement | PHI | Ocean | 28 min |
| Sep 9, 1:46 PM EDT | Special Weather Statement | PHI | Ocean | 29 min |
| Sep 9, 2:07 PM EDT | Special Weather Statement | PHI | Atlantic | 38 min |
| Sep 9, 2:16 PM EDT | Special Weather Statement | PHI | Burlington | 29 min |
| Sep 9, 2:26 PM EDT | Special Weather Statement | PHI | Middlesex | 34 min |
| Sep 9, 2:42 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth, Somerset | 48 min |
| Sep 9, 3:09 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Somerset | 49 min |
| Sep 9, 3:40 PM EDT | Areal Flood Advisory | PHI | Middlesex, Morris, Somerset | 2 hr |
| Sep 9, 3:47 PM EDT | Severe Thunderstorm Warning | PHI | Morris | 43 min |
| Sep 9, 3:58 PM EDT | Special Weather Statement | PHI | Somerset | 32 min |
| Sep 9, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset, Sussex | 53 min |
| Sep 9, 4:37 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 53 min |
| Sep 9, 4:40 PM EDT | Special Marine Warning | PHI | 65 min | |
| Sep 9, 4:42 PM EDT | Areal Flood Advisory | PHI | Morris | 3 hr |
| Sep 9, 4:49 PM EDT | Special Weather Statement | PHI | Warren | 41 min |
| Sep 9, 5:34 PM EDT | Special Weather Statement | PHI | Salem | 26 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2023Severe Thunderstorm Warnings in New Jersey, 2023Severe Thunderstorm Warnings in Delaware, 2023Every severe thunderstorm warning in 2023
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.