Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 274, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 28, 2020, 3:52 PM EDT for Cumberland County, Gloucester County, Salem County, New Jersey; New Castle County, Delaware; Chester County, Delaware County, Pennsylvania. It was in force for 53 min. 9 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
- Aug 28, 2020, 3:52 PM EDT (19:52 UTC)
- Expired
- Aug 28, 2020, 4:45 PM EDT
- In force
- 53 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties New Castle County, DE, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA
The radar
The Philadelphia radar (KDIX), 94 km from the middle of the area, began a volume at 19:53 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 |
|---|---|---|---|
| Aug 28, 3:55 PM EDT | TSTM WND GST 60 | Avondale, PA | |
| Aug 28, 3:55 PM EDT | HAIL 0.25 | Avondale, PA | |
| Aug 28, 4:10 PM EDT | HAIL 0.88 | Chadds Ford Twp, PA | |
| Aug 28, 4:20 PM EDT | TSTM WND DMG | Media, PA | TREE AND UTILITY WIRES DOWN ON FARNUM ROAD. |
| Aug 28, 4:29 PM EDT | TSTM WND DMG | 1 S Avondale, PA | DOWNED TREES AND WIRES NEAR MCMILLAN DRIVE IN AVONDALE. TIME ESTIMATED FROM RADAR. |
| Aug 28, 4:30 PM EDT | HAIL 0.25 | Springfield, PA | |
| Aug 28, 4:39 PM EDT | TSTM WND DMG | 1 W Lima, PA | A FEW REPORTS OF DOWNED TREES AND WIRES NEAR AND WEST OF LIMA. TIME ESTIMATED FROM RADAR. |
| Aug 28, 4:39 PM EDT | TSTM WND DMG | 2 Ssw Pennsbury Twp, PA | DOWNED POWER LINES NEAR WEDGEWOOD DRIVE IN FAIRVILLE. TIME ESTIMATED FROM RADAR. |
| Aug 28, 4:45 PM EDT | TSTM WND DMG | 1 Ese Chester Heights, PA | A FEW REPORTS OF DOWNED TREES AND WIRES IN THE CHESTER HEIGHTS AND ASTON MILLS AREAS. 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 |
|---|---|---|---|
| Aug 28, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.9 hours before the alert went out and 186 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
- 511 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1109 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
000
WUUS51 KPHI 281952
SVRPHI
DEC003-NJC011-015-033-PAC029-045-282045-
/O.NEW.KPHI.SV.W.0274.200828T1952Z-200828T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
352 PM EDT Fri Aug 28 2020
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northern New Castle County in northern Delaware...
Northwestern Cumberland County in southern New Jersey...
Salem County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
South central Chester County in southeastern Pennsylvania...
Southern Delaware County in southeastern Pennsylvania...
* Until 445 PM EDT.
* At 352 PM EDT, severe thunderstorms were located along a line
extending from Kennett Square to near Bear to Hope Creek, moving
east at 30 mph.
HAZARD...60 mph wind gusts and quarter 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...
Wilmington, Newark, Chester, Pennsville, Carneys Point, Folcroft,
Swarthmore, Elsmere, Paulsboro, Kennett Square, New Castle, Penns
Grove, Salem, Woodstown, Alloway, Quinton, Swedesboro, Delaware
City, Elmer and Newport.
This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Interstate 95 in Pennsylvania between mile markers 0 and 10.
Interstate 95 in Delaware between mile markers 2 and 23.
Interstate 295 in New Jersey between mile markers 0 and 18.
Interstate 476 in Pennsylvania between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3994 7528 3948 7514 3944 7558 3958 7573
3988 7583
TIME...MOT...LOC 1952Z 262DEG 28KT 3982 7573 3960 7565 3949 7555
HAIL...1.00IN
WIND...60MPH
$$
Staarmann1 follow-up statement
610
WWUS51 KPHI 282010
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
410 PM EDT Fri Aug 28 2020
DEC003-NJC011-015-033-PAC029-045-282045-
/O.CON.KPHI.SV.W.0274.000000T0000Z-200828T2045Z/
New Castle DE-Cumberland NJ-Salem NJ-Gloucester NJ-Chester PA-
Delaware PA-
410 PM EDT Fri Aug 28 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHEASTERN NEW CASTLE...NORTHWESTERN CUMBERLAND...SALEM...
NORTHWESTERN GLOUCESTER...SOUTH CENTRAL CHESTER AND SOUTHERN DELAWARE
COUNTIES...
At 410 PM EDT, severe thunderstorms were located along a line
extending from near Elam to near Salem to near Hancocks Bridge,
moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter 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...
Wilmington, Chester, Pennsville, Carneys Point, Folcroft, Swarthmore,
Elsmere, Paulsboro, New Castle, Penns Grove, Salem, Woodstown,
Alloway, Quinton, Swedesboro, Delaware City, Elmer, Newport, Arden
and Darby Township.
This includes the following highways...
New Jersey Turnpike between exits 1 and 2.
Interstate 95 in Pennsylvania between mile markers 0 and 10.
Interstate 95 in Delaware between mile markers 9 and 23.
Interstate 295 in New Jersey between mile markers 0 and 17.
Interstate 476 in Pennsylvania between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Protecting yourself from immediate threats to life and safety shall
take priority. Whenever possible, as long as it does not cause
greater harm, all COVID-19 protective action guidance should be
followed.
For your protection move to an interior room on the lowest floor of a
building.
Frequent cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3994 7528 3948 7515 3945 7547 3956 7560
3990 7568
TIME...MOT...LOC 2010Z 266DEG 26KT 3985 7559 3957 7552 3949 7542
HAIL...1.00IN
WIND...60MPH
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 8:13 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset, Warren | 47 min |
| Aug 27, 8:24 PM EDT | Special Weather Statement | PHI | Middlesex, Somerset | 51 min |
| Aug 27, 8:29 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 46 min |
| Aug 27, 8:55 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 27, 9:13 PM EDT | Special Weather Statement | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 47 min |
| Aug 27, 9:28 PM EDT | Severe Thunderstorm Warning | PHI | Mercer, Middlesex, Monmouth, Ocean, Somerset | 47 min |
| Aug 28, 3:05 PM EDT | Special Marine Warning | PHI | 85 min | |
| Aug 28, 3:41 PM EDT | Special Weather Statement | PHI | Salem | 34 min |
| Aug 28, 3:53 PM EDT | Special Marine Warning | PHI | 67 min | |
| Aug 28, 4:07 PM EDT | Special Marine Warning | PHI | 53 min | |
| Aug 28, 4:17 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 43 min |
| Aug 28, 4:29 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Mercer | 61 min |
| Aug 28, 4:39 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Cumberland, Gloucester, Salem | 66 min |
| Aug 28, 4:49 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 56 min |
| Aug 28, 4:55 PM EDT | Special Marine Warning | PHI | 95 min | |
| Aug 28, 5:13 PM EDT | Special Marine Warning | PHI | 92 min | |
| Aug 28, 5:28 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 47 min |
| Aug 28, 5:37 PM EDT | Special Marine Warning | PHI | 83 min | |
| Aug 28, 5:51 PM EDT | Special Marine Warning | PHI | 84 min | |
| Aug 28, 6:53 PM EDT | Special Marine Warning | PHI | 64 min | |
| Aug 28, 7:55 PM EDT | Special Marine Warning | PHI | 65 min | |
| Aug 28, 1:53 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 52 min |
| Aug 28, 2:40 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 50 min |
| Aug 28, 3:15 PM EDT | Special Weather Statement | PHI | New Castle | 30 min |
| Aug 28, 3:21 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 24 min |
| Aug 28, 4:01 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 44 min |
| Aug 28, 5:40 PM EDT | Special Weather Statement | PHI | Kent | 35 min |
| Aug 28, 6:17 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 43 min |
| Aug 28, 7:53 PM EDT | Special Weather Statement | PHI | Sussex | 37 min |
| Aug 27, 8:26 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 26 min |
| Aug 28, 3:22 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 53 min |
| Aug 28, 3:33 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 101 min |
| Aug 28, 3:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 54 min |
| Aug 28, 3:56 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 49 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2020Severe Thunderstorm Warnings in Pennsylvania, 2020Severe Thunderstorm Warnings in Delaware, 2020Every severe thunderstorm warning in 2020
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.