Alert archive / New Jersey / Special Weather Statements in 2021
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 10, 2021, 5:58 PM EDT for 5 counties in New Jersey; Philadelphia County, Pennsylvania. It was in force for 32 min. 1 report 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, 5:58 PM EDT (21:58 UTC)
- Expired
- Aug 10, 2021, 6:30 PM EDT
- In force
- 32 min
- Issued by
- NWS Philadelphia/Mount Holly
- Hail
- 0.25 in
- Wind
- 40
Counties Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Warren County, NJ, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 22:02 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, 6:05 PM EDT | TSTM WND DMG | Bensalem, PA | A FEW SHINGLES BLOWN OFF, ALONG WITH 2 INCH DIAMETER LIMBS. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.0 hours before the alert went out and 153 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
- 73 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 635 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
358
WWUS81 KPHI 102158
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
558 PM EDT Tue Aug 10 2021
NJZ007>010-012-013-015-018-019-PAZ071-104-106-102230-
Hunterdon NJ-Morris NJ-Northwestern Burlington NJ-Camden NJ-
Western Monmouth NJ-Somerset NJ-Middlesex NJ-Warren NJ-Mercer NJ-
Lower Bucks PA-Eastern Montgomery PA-Philadelphia PA-
558 PM EDT Tue Aug 10 2021
...Strong thunderstorms will impact portions of eastern Hunterdon,
southern Morris, northwestern Camden, east central Warren, Mercer,
northwestern Burlington, Somerset, southwestern Monmouth, Middlesex,
southeastern Montgomery, southeastern Bucks and Philadelphia Counties
through 630 PM EDT...
At 558 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Great Meadows-Vienna to near Bridgewater
to near Wissinoming. Movement was east at 25 mph.
HAZARD...Winds in excess of 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Philadelphia, Trenton, Camden, New Brunswick, Morristown, Somerville,
Somerset, Edison, Cherry Hill, Bensalem, East Brunswick, Evesham,
Bridgewater, South Brunswick, Mount Laurel, North Brunswick, Ewing,
Willingboro, Medford and Dover.
This includes the following highways...
New Jersey Turnpike between exits 4 and 11.
Pennsylvania Turnpike between mile markers 339 and 359.
Interstate 95 in Pennsylvania between mile markers 22 and 40.
Interstate 76 in Pennsylvania between mile markers 336 and 343.
Interstate 78 in New Jersey between mile markers 24 and 43.
Interstate 80 in New Jersey between mile markers 24 and 34.
Interstate 195 in New Jersey between mile markers 0 and 10.
Interstate 295 in New Jersey between mile markers 35 and 76.
Interstate 287 in New Jersey between mile markers 0 and 37.
Interstate 676 in New Jersey near mile marker 4.
Garden State Parkway between mile markers 130 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3983 7477 3983 7480 4001 7530 4063 7477
4088 7504 4092 7472 4090 7471 4093 7459
4073 7437 4067 7446 4066 7445 4067 7441
4065 7440 4060 7446 4061 7431 4059 7427
TIME...MOT...LOC 2158Z 271DEG 23KT 4083 7491 4064 7469 4005 7508
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 1:02 AM EDT | Special Weather Statement | PHI | Burlington | 28 min |
| Aug 10, 3:33 AM EDT | Excessive Heat Warning | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 5 more | 4 days |
| Aug 10, 3:33 AM EDT | Heat Advisory | PHI | Atlantic, Cape May, Cumberland, Monmouth, Ocean, Salem and 2 more | 4 days |
| Aug 10, 3:54 AM EDT | Areal Flood Advisory | PHI | Atlantic | 80 min |
| Aug 10, 4:59 AM EDT | Areal Flood Advisory | PHI | Burlington | 60 min |
| Aug 10, 5:58 AM EDT | Flash Flood Warning | PHI | Burlington, Mercer | 2 hr |
| Aug 10, 2:07 PM EDT | Special Weather Statement | PHI | Salem | 38 min |
| Aug 10, 4:52 PM EDT | Special Weather Statement | PHI | Monmouth | 23 min |
| Aug 10, 4:54 PM EDT | Special Marine Warning | PHI | 26 min | |
| Aug 10, 5:05 PM EDT | Special Weather Statement | PHI | Somerset, Warren | 25 min |
| Aug 10, 5:09 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Hunterdon, Mercer, Somerset, Warren | 51 min |
| Aug 10, 5:30 PM EDT | Special Weather Statement | PHI | Warren | 30 min |
| Aug 10, 6:27 PM EDT | Special Weather Statement | PHI | Burlington, Mercer, Middlesex, Monmouth, Morris | 33 min |
| Aug 10, 6:59 PM EDT | Special Weather Statement | PHI | Middlesex, Monmouth | 31 min |
| Aug 10, 7:09 PM EDT | Special Marine Warning | PHI | 66 min | |
| Aug 10, 7:27 PM EDT | Special Weather Statement | PHI | Monmouth | 33 min |
| Aug 9, 10:10 PM EDT | Areal Flood Advisory | PHI | Carbon | 3 hr |
| Aug 10, 3:06 PM EDT | Special Weather Statement | PHI | Berks | 24 min |
| Aug 10, 3:33 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| Aug 10, 3:52 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh | 23 min |
| Aug 10, 4:01 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Chester, Lehigh, Montgomery, Northampton | 44 min |
| Aug 10, 4:18 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh | 3 hr |
| Aug 10, 4:33 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more | 42 min |
| Aug 10, 5:11 PM EDT | Special Weather Statement | PHI | Chester, Montgomery, Philadelphia | 34 min |
| Aug 10, 5:40 PM EDT | Special Weather Statement | PHI | Chester | 35 min |
| Aug 10, 6:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 39 min |
| Aug 10, 7:10 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 65 min |
| Aug 10, 7:54 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 51 min |
| Aug 10, 7:12 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 33 min |
| Aug 10, 7:42 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's, Talbot | 33 min |
Nearby
Special Weather Statements in New Jersey, 2021Special Weather Statements in Pennsylvania, 2021Every special weather statement 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.