Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 246, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 10, 2021, 8:02 PM EDT for Delaware County, Philadelphia County, Pennsylvania; Camden County, Gloucester County, New Jersey. It was in force for 43 min. 8 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 10, 2021, 8:02 PM EDT (00:02 UTC)
- Expired
- Aug 10, 2021, 8:45 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 Camden County, NJ, Gloucester County, NJ, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 79 km from the middle of the area, began a volume at 00:05 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 10, 8:03 PM EDT | TSTM WND DMG | 1 Wsw Parkside, PA | TREE AND WIRES DOWN ON SUSAN LN NEAR ARLINGTON AVE. TIME ESTIMATED FROM RADAR. |
| Aug 10, 8:05 PM EDT | TSTM WND DMG | 1 Sse Ridley Park, PA | TREE AND WIRES DOWN NEAR SELLERS AVE AT INDUSTRIAL HIGHWAY. TIME ESTIMATED FROM RADAR. |
| Aug 10, 8:13 PM EDT | TSTM WND DMG | Morton, PA | TREES AND WIRES DOWN ON SPRINGHILL RD. TIME ESTIMATED FROM RADAR. |
| Aug 10, 8:25 PM EDT | TSTM WND DMG | Swarthmore, PA | TREE AND WIRES DOWN NEAR THE INTERSECTION OF RUTGERS AVE AT HARVARD AVE. TIME ESTIMATED FROM RADAR. |
| Aug 10, 8:26 PM EDT | TSTM WND DMG | Darby Twp, PA | WIRES DOWN ON ACADEMY AVE NEAR GLEN CIRCLE. TIME ESTIMATED FROM RADAR. |
| Aug 10, 8:27 PM EDT | TSTM WND DMG | 1 Nne Woodlyn, PA | DOWNED TREE AND WIRES NEAR EISENHOWER AVE AT CATHERINE AVE. TIME ESTIMATED FROM RADAR. |
| Aug 10, 8:30 PM EDT | TSTM WND DMG | Primos, PA | TREE AND WIRES DOWN NEAR THE INTERSECTION OF BISHOP AVE AND BROADWAY AVE. TIME ESTIMATED FROM RADAR. |
| Aug 10, 8:35 PM EDT | TSTM WND GST 56 | 1 Wsw Philadelphia Inte, PA | ITWS SENSOR AT PHILADELPHIA INTERNATIONAL AIRPORT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.0 hours before the alert went out and 204 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1735 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 210 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
488
WUUS51 KPHI 110002
SVRPHI
NJC007-015-PAC045-101-110045-
/O.NEW.KPHI.SV.W.0246.210811T0002Z-210811T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
802 PM EDT Tue Aug 10 2021
The National Weather Service in Mount Holly NJ has issued a
* Severe Thunderstorm Warning for...
Northwestern Camden County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
Southwestern Philadelphia County in southeastern Pennsylvania...
Southeastern Delaware County in southeastern Pennsylvania...
* Until 845 PM EDT.
* At 801 PM EDT, a severe thunderstorm was located over Gibbstown, or
12 miles northeast of Wilmington, moving northeast at 20 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, Camden, Gloucester City, Chester, Deptford, Voorhees,
West Deptford, Lindenwold, Bellmawr, Yeadon, Woodbury, Folcroft,
Swarthmore, Paulsboro, Magnolia, Westville, Woodbury Heights,
National Park, East Lansdowne and Swedesboro.
This includes the following highways...
New Jersey Turnpike between exits 2 and 3.
Interstate 95 in Pennsylvania between mile markers 1 and 25.
Interstate 76 in Pennsylvania between mile markers 340 and 351.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 9 and 33.
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 0 and 1.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3973 7537 3979 7542 3980 7541 3981 7544
3983 7545 4005 7514 3983 7494
TIME...MOT...LOC 0001Z 237DEG 18KT 3981 7532
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 8:18 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 42 min |
| Aug 10, 8:36 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 39 min |
| Aug 10, 8:43 PM EDT | Areal Flood Advisory | PHI | Delaware, Montgomery, Philadelphia | 2 hr |
| Aug 11, 2:56 PM EDT | Excessive Heat Watch | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 12 hr |
| Aug 11, 4:46 PM EDT | Special Weather Statement | PHI | Monroe | 44 min |
| Aug 11, 4:58 PM EDT | Special Weather Statement | PHI | Berks | 47 min |
| Aug 11, 5:20 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 57 min |
| Aug 11, 5:48 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 57 min |
| Aug 11, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Montgomery | 44 min |
| Aug 11, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 49 min |
| Aug 11, 6:48 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Montgomery, Northampton | 42 min |
| Aug 11, 6:50 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 3 hr |
| Aug 11, 7:04 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more | 2 hr |
| Aug 11, 7:11 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 49 min |
| Aug 10, 8:23 PM EDT | Special Marine Warning | PHI | 79 min | |
| Aug 10, 9:07 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Cumberland | 23 min |
| Aug 11, 5:57 PM EDT | Special Weather Statement | PHI | Sussex | 48 min |
| Aug 11, 6:32 PM EDT | Special Weather Statement | PHI | Morris, Sussex, Warren | 28 min |
| Aug 11, 7:04 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 41 min |
| Aug 11, 7:28 PM EDT | Flash Flood Warning | PHI | Morris, Warren | 3 hr |
| Aug 11, 7:45 PM EDT | Special Weather Statement | PHI | Morris | 45 min |
| Aug 11, 7:52 PM EDT | Special Weather Statement | PHI | Atlantic, Burlington, Camden, Gloucester, Mercer | 53 min |
| Aug 11, 7:57 PM EDT | Special Weather Statement | PHI | Hunterdon, Middlesex, Somerset | 48 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.