Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 214, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2021, 3:16 PM EDT for Bucks County, Montgomery County, Philadelphia County, Pennsylvania; Burlington County, Camden County, New Jersey. It was in force for 44 min. 11 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 21, 2021, 3:16 PM EDT (19:16 UTC)
- Expired
- Jul 21, 2021, 4:00 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 80.0 mph
Counties Burlington County, NJ, Camden County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 60 km from the middle of the area, began a volume at 19:15 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 21, 3:20 PM EDT | TSTM WND DMG | 1 S Fort Washington, PA | TREES DOWN NEAR THE PENNSYLVANIA TURNPIKE. |
| Jul 21, 3:20 PM EDT | TSTM WND GST 55 | Fort Washington, PA | MESOWEST. |
| Jul 21, 3:25 PM EDT | HAIL 1 | Flourtown, PA | PHOTO FROM SOCIAL MEDIA, HAIL ESTIMATED AT QUARTER SIZE IN FLOURTOWN. TIME ESTIMATED FROM RADAR. |
| Jul 21, 3:28 PM EDT | TSTM WND DMG | Abington, PA | LARGE TREE SHEARED APART IN ABINGTON TOWNSHIP. PHOTO RELAYED ON SOCIAL MEDIA. TIME ESTIMATED FROM RADAR. |
| Jul 21, 3:30 PM EDT | HAIL 1 | Abington, PA | |
| Jul 21, 3:30 PM EDT | HAIL 1 | Glenside, PA | |
| Jul 21, 3:30 PM EDT | HAIL 1 | Jenkintown, PA | |
| Jul 21, 3:40 PM EDT | TSTM WND DMG | 2 Nw Holmesburg, PA | TREES ON WIRES ON STANWOOD ST IN RHAWNHURST. |
| Jul 21, 3:45 PM EDT | TSTM WND DMG | Tacony, PA | TREES DOWN NEAR VOGT RECREATION CENTER IN TACONY. TIME ESTIMATED FROM RADAR. |
| Jul 21, 3:50 PM EDT | HAIL 0.7 | Delanco, NJ | |
| Jul 21, 3:51 PM EDT | TSTM WND DMG | Delanco, NJ | WIRES DOWN IN DELANCO NEAR BORDER WITH RIVERSIDE TOWNSHIP/RANCOCAS RIVER. 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 |
|---|---|---|---|
| Jul 21, 11:56 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.3 hours before the alert went out and 208 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
- 130 J/kg
- Mixed-layer CIN
- -165 J/kg
- Mixed-layer LCL
- 1495 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
459
WUUS51 KPHI 211916
SVRPHI
NJC005-007-PAC017-091-101-212000-
/O.NEW.KPHI.SV.W.0214.210721T1916Z-210721T2000Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
316 PM EDT Wed Jul 21 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Camden County in southern New Jersey...
Northwestern Burlington County in southern New Jersey...
Southeastern Montgomery County in southeastern Pennsylvania...
South central Bucks County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
* Until 400 PM EDT.
* At 316 PM EDT, a severe thunderstorm was located over Plymouth
Meeting, or 10 miles northwest of Philadelphia, moving southeast at
30 mph.
This is a very dangerous storm.
HAZARD...80 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
* Locations impacted include...
Philadelphia, Camden, Gloucester City, Bensalem, Norristown, West
Norriton, East Norriton, Bellmawr, Riverside, Conshohocken,
Palmyra, Hatboro, Ambler, Jenkintown, Westville, Narberth, Beverly,
Rockledge, Brooklawn and Abington.
This includes the following highways...
Pennsylvania Turnpike between mile markers 329 and 352.
Northeast Extension between mile markers 21 and 23.
Interstate 95 in Pennsylvania between mile markers 18 and 38.
Interstate 76 in Pennsylvania between mile markers 330 and 345, and
between mile markers 350 and 351.
Interstate 76 in New Jersey between mile markers 1 and 3.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 0 and 4.
Interstate 476 in Pennsylvania between mile markers 15 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4010 7488 3987 7512 4011 7540 4022 7519
TIME...MOT...LOC 1916Z 303DEG 27KT 4012 7526
HAIL...1.25IN
WIND...80MPH
$$
NC2 follow-up statements
963
WWUS51 KPHI 211934
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
334 PM EDT Wed Jul 21 2021
NJC005-007-PAC017-091-101-212000-
/O.CON.KPHI.SV.W.0214.000000T0000Z-210721T2000Z/
Camden NJ-Burlington NJ-Montgomery PA-Bucks PA-Philadelphia PA-
334 PM EDT Wed Jul 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTHWESTERN CAMDEN...NORTHWESTERN BURLINGTON...SOUTHEASTERN
MONTGOMERY...SOUTH CENTRAL BUCKS AND PHILADELPHIA COUNTIES...
At 333 PM EDT, a severe thunderstorm was located over Rockledge, or
near Philadelphia, moving southeast at 30 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to vehicles is possible. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Philadelphia, Camden, Gloucester City, Bensalem, Bellmawr, Riverside,
Conshohocken, Palmyra, Hatboro, Jenkintown, Westville, Beverly,
Rockledge, Brooklawn, Abington, Bryn Athyn, Audubon Park,
Wissinoming, Willow Grove and Germantown.
This includes the following highways...
Pennsylvania Turnpike between mile markers 338 and 344.
Interstate 95 in Pennsylvania between mile markers 19 and 38.
Interstate 76 in Pennsylvania between mile markers 334 and 344, and
near mile marker 351.
Interstate 76 in New Jersey between mile markers 1 and 3.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4010 7488 3987 7512 4002 7525 4009 7531
4017 7511
TIME...MOT...LOC 1933Z 303DEG 27KT 4005 7512
HAIL...1.00IN
WIND...70MPH
$$
NC593
WWUS51 KPHI 211953
SVSPHI
Severe Weather Statement
National Weather Service Mount Holly NJ
353 PM EDT Wed Jul 21 2021
NJC005-007-PAC017-091-101-212003-
/O.EXP.KPHI.SV.W.0214.000000T0000Z-210721T2000Z/
Camden NJ-Burlington NJ-Montgomery PA-Bucks PA-Philadelphia PA-
353 PM EDT Wed Jul 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAMDEN...
NORTHWESTERN BURLINGTON...SOUTHEASTERN MONTGOMERY...SOUTH CENTRAL
BUCKS AND PHILADELPHIA COUNTIES WILL EXPIRE AT 400 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern New Jersey...and southeastern Pennsylvania.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.
LAT...LON 4010 7488 3987 7512 4002 7525 4009 7531
4017 7511
TIME...MOT...LOC 1953Z 303DEG 27KT 3998 7497
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 1:08 PM EDT | Special Weather Statement | PHI | Lehigh | 37 min |
| Jul 21, 1:11 PM EDT | Special Weather Statement | PHI | Northampton | 34 min |
| Jul 21, 1:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 48 min |
| Jul 21, 2:03 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 42 min |
| Jul 21, 2:14 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Chester, Delaware, Montgomery | 19 min |
| Jul 21, 2:41 PM EDT | Special Weather Statement | PHI | Montgomery | 49 min |
| Jul 21, 2:48 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 42 min |
| Jul 21, 2:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 38 min |
| Jul 21, 3:27 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 33 min |
| Jul 21, 3:48 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 42 min |
| Jul 21, 5:59 PM EDT | Special Weather Statement | PHI | Berks | 31 min |
| Jul 21, 11:09 AM EDT | Special Weather Statement | PHI | Morris | 36 min |
| Jul 21, 12:41 PM EDT | Special Weather Statement | PHI | Ocean | 34 min |
| Jul 21, 12:46 PM EDT | Special Marine Warning | PHI | 89 min | |
| Jul 21, 12:51 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Ocean | 39 min |
| Jul 21, 12:53 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 67 min |
| Jul 21, 1:28 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic | 47 min |
| Jul 21, 1:43 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 49 min |
| Jul 21, 2:10 PM EDT | Special Marine Warning | PHI | 95 min | |
| Jul 21, 2:13 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 47 min |
| Jul 21, 2:35 PM EDT | Special Marine Warning | PHI | 55 min | |
| Jul 21, 2:52 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 26 min |
| Jul 21, 3:04 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 56 min |
| Jul 21, 3:43 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 47 min |
| Jul 21, 3:48 PM EDT | Special Marine Warning | PHI | 57 min | |
| Jul 21, 3:57 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Salem | 33 min |
| Jul 21, 4:04 PM EDT | Special Marine Warning | PHI | 56 min | |
| Jul 21, 4:17 PM EDT | Special Marine Warning | PHI | 58 min | |
| Jul 21, 4:50 PM EDT | Special Marine Warning | PHI | 55 min | |
| Jul 21, 5:07 PM EDT | Special Marine Warning | PHI | 23 min | |
| Jul 21, 5:09 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 21, 5:24 PM EDT | Special Marine Warning | PHI | 46 min | |
| Jul 21, 5:31 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 29 min |
| Jul 21, 5:52 PM EDT | Special Marine Warning | PHI | 53 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2021Severe Thunderstorm Warnings in New Jersey, 2021Every severe thunderstorm warning in 2021
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.