Alert archive / Pennsylvania / Special Weather Statements in 2018
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 3, 2018, 5:45 PM EDT for Delaware County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 60 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 3, 2018, 5:45 PM EDT (21:45 UTC)
- Expired
- Aug 3, 2018, 6:45 PM EDT
- In force
- 60 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 64 km from the middle of the area, began a volume at 21:46 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
Brookhaven, NY (KOKX), launched 12:00Z, 9.8 hours before the alert went out and 215 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
- 1132 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 732 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.2
The text
As transmitted.
258
WWUS81 KPHI 032145
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
545 PM EDT FRI AUG 3 2018
DEZ001-NJZ016>018-PAZ070-071-102>104-032245-
New Castle-Salem-Camden-Gloucester-Eastern Montgomery-Western
Montgomery-Delaware-Eastern Chester-Philadelphia-
545 PM EDT FRI AUG 3 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN NEW CASTLE...
NORTHWESTERN SALEM...NORTHWESTERN CAMDEN...NORTHWESTERN GLOUCESTER...
SOUTHEASTERN MONTGOMERY...SOUTHEASTERN CHESTER...PHILADELPHIA AND
DELAWARE COUNTIES...
At 544 PM EDT, a strong thunderstorm was located over Arden, or 7
miles northeast of Wilmington, moving northeast at 20 mph.
Winds up to 40 mph are possible with this storm.
Locations impacted include...
Philadelphia, Camden, Wilmington, Norristown, Chester, Lansdale, West
Norriton, East Norriton, Yeadon, Westtown, Carneys Point,
Conshohocken, Palmyra, Folcroft, Ambler, Swarthmore, Paulsboro, Penns
Grove, Jenkintown and Narberth.
Torrential rainfall is also occurring with this storm, and may cause
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 4027 7533 4008 7496 4006 7498 4005 7498
4002 7501 4002 7504 3999 7506 4000 7504
3999 7503 3967 7543 3982 7565
TIME...MOT...LOC 2144Z 220DEG 17KT 3982 7545
$$
MeolaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 9:35 PM EDT | Special Weather Statement | PHI | Somerset | 25 min |
| Aug 2, 10:05 PM EDT | Special Weather Statement | PHI | Morris, Somerset | 55 min |
| Aug 3, 11:47 AM EDT | Special Marine Warning | PHI | 88 min | |
| Aug 3, 12:17 PM EDT | Special Weather Statement | PHI | Cape May | 43 min |
| Aug 3, 12:37 PM EDT | Special Weather Statement | PHI | Camden, Gloucester | 38 min |
| Aug 3, 12:52 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 21 min |
| Aug 3, 1:01 PM EDT | Special Weather Statement | PHI | Hunterdon | 44 min |
| Aug 3, 1:14 PM EDT | Special Weather Statement | PHI | Mercer | 46 min |
| Aug 3, 1:27 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 48 min |
| Aug 3, 1:42 PM EDT | Special Weather Statement | PHI | Hunterdon, Morris, Sussex, Warren | 63 min |
| Aug 3, 2:00 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Somerset | 30 min |
| Aug 3, 2:37 PM EDT | Special Weather Statement | PHI | Morris, Sussex | 38 min |
| Aug 3, 2:54 PM EDT | Special Marine Warning | PHI | 20 min | |
| Aug 3, 3:33 PM EDT | Special Weather Statement | PHI | Camden, Gloucester, Salem | 57 min |
| Aug 3, 4:31 PM EDT | Special Weather Statement | PHI | Salem | 59 min |
| Aug 3, 4:45 PM EDT | Special Weather Statement | PHI | Warren | 60 min |
| Aug 3, 5:25 PM EDT | Special Weather Statement | PHI | Monmouth, Ocean | 50 min |
| Aug 3, 5:27 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Gloucester | 63 min |
| Aug 3, 6:52 PM EDT | Special Weather Statement | PHI | Sussex, Warren | 113 min |
| Aug 3, 7:56 PM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 4 hr |
| Aug 3, 3:42 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 63 min |
| Aug 3, 7:37 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 4 hr |
| Aug 3, 3:29 PM EDT | Special Weather Statement | PHI | Sussex | 46 min |
Nearby
Special Weather Statements in Pennsylvania, 2018Every special weather statement in 2018
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.