Alert archive / Pennsylvania / Special Weather Statements in 2021
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 27, 2021, 3:44 PM EDT for Delaware County, Pennsylvania. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 27, 2021, 3:44 PM EDT (19:44 UTC)
- Expired
- Aug 27, 2021, 4:15 PM EDT
- In force
- 31 min
- Issued by
- NWS Philadelphia/Mount Holly
- Hail
- 0.25 in
- Wind
- 40
County Delaware County, PA
The radar
The Philadelphia radar (KDIX), 91 km from the middle of the area, began a volume at 19:48 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.7 hours before the alert went out and 192 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
- 780 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 983 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
962
WWUS81 KPHI 271944
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
344 PM EDT Fri Aug 27 2021
DEZ001-NJZ016-017-272015-
New Castle DE-Salem NJ-Gloucester NJ-
344 PM EDT Fri Aug 27 2021
...A strong thunderstorm will impact portions of northeastern New
Castle, northwestern Salem and west central Gloucester Counties
through 415 PM EDT...
At 344 PM EDT, Doppler radar was tracking a strong thunderstorm over
Arden, or near Wilmington. This storm was nearly stationary.
HAZARD...Wind gusts up to 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...
Wilmington, Pennsville, Carneys Point, New Castle, Penns Grove,
Arden, Beckett, Delaware Memorial Bridge, Talleyville, Marcus Hook,
Bellefonte, Ardentown, Ardencroft, Edgemoor and Claymont.
This includes the following highways...
Interstate 95 in Pennsylvania near mile marker 0.
Interstate 95 in Delaware between mile markers 16 and 23.
Interstate 295 in New Jersey near mile marker 0, and between mile
markers 4 and 11.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3983 7549 3982 7544 3980 7541 3983 7537
3974 7534 3967 7555 3983 7555
TIME...MOT...LOC 1944Z 342DEG 3KT 3978 7547
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 1:33 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden | 83 min |
| Aug 27, 2:18 PM EDT | Small Craft Advisory | PHI | 44 hr | |
| Aug 27, 2:28 PM EDT | Special Weather Statement | PHI | Atlantic | 47 min |
| Aug 27, 2:33 PM EDT | Areal Flood Advisory | PHI | Warren | 109 min |
| Aug 27, 2:37 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 38 min |
| Aug 27, 2:38 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 35 min |
| Aug 27, 2:59 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 46 min |
| Aug 27, 3:07 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 24 min |
| Aug 27, 3:16 PM EDT | Special Weather Statement | PHI | Burlington | 44 min |
| Aug 27, 3:30 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 45 min |
| Aug 27, 3:38 PM EDT | Special Weather Statement | PHI | Camden | 52 min |
| Aug 27, 3:45 PM EDT | Special Weather Statement | PHI | Ocean | 30 min |
| Aug 27, 3:54 PM EDT | Special Weather Statement | PHI | Atlantic | 51 min |
| Aug 27, 3:59 PM EDT | Special Weather Statement | PHI | Ocean | 46 min |
| Aug 27, 4:06 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester | 39 min |
| Aug 27, 4:37 PM EDT | Areal Flood Advisory | PHI | Gloucester | 106 min |
| Aug 27, 4:46 PM EDT | Special Marine Warning | PHI | 43 min | |
| Aug 27, 4:56 PM EDT | Special Weather Statement | PHI | Atlantic | 34 min |
| Aug 27, 5:02 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cumberland | 29 min |
| Aug 27, 5:09 PM EDT | Areal Flood Advisory | PHI | Atlantic, Cape May, Cumberland | 2 hr |
| Aug 27, 5:21 PM EDT | Special Weather Statement | PHI | Middlesex | 39 min |
| Aug 27, 5:29 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 3 hr |
| Aug 27, 5:44 PM EDT | Flash Flood Warning | PHI | Middlesex | 4 hr |
| Aug 27, 6:52 PM EDT | Areal Flood Advisory | PHI | Salem | 98 min |
| Aug 27, 1:20 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 2 hr |
| Aug 27, 1:36 PM EDT | Special Weather Statement | PHI | Monroe | 24 min |
| Aug 27, 1:52 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 53 min |
| Aug 27, 2:12 PM EDT | Special Weather Statement | PHI | Northampton | 33 min |
| Aug 27, 2:18 PM EDT | Areal Flood Advisory | PHI | Chester | 93 min |
| Aug 27, 2:32 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe, Northampton | 28 min |
| Aug 27, 2:42 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 14 min |
| Aug 27, 6:29 PM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| Aug 27, 6:41 PM EDT | Special Weather Statement | PHI | Berks | 34 min |
| Aug 27, 7:17 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Aug 27, 3:48 PM EDT | Areal Flood Advisory | PHI | New Castle | 102 min |
| Aug 27, 5:11 PM EDT | Areal Flood Advisory | PHI | New Castle | 3 hr |
| Aug 27, 5:39 PM EDT | Special Weather Statement | PHI | New Castle | 36 min |
| Aug 27, 6:10 PM EDT | Areal Flood Advisory | PHI | New Castle | 2 hr |
| Aug 27, 7:10 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 65 min |
| Aug 27, 7:37 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's | 34 min |
Nearby
Special 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.