Alert archive / New Jersey / Special Weather Statements in 2017
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at May 25, 2017, 8:39 PM EDT for 4 counties in New Jersey; Chester County, Delaware County, Pennsylvania. It was in force for 51 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
- May 25, 2017, 8:39 PM EDT (00:39 UTC)
- Expired
- May 25, 2017, 9:30 PM EDT
- In force
- 51 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA
The radar
The Dover AFB radar (KDOX), 102 km from the middle of the area, began a volume at 00:39 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 |
|---|---|---|---|
| May 25, 9:40 PM EDT | HAIL 0.5 | South Philadelphia, PA | PEA TO HALF INCH HAIL REPORTED IN SOUTH PHILADELPHIA. |
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, 0.7 hours before the alert went out and 178 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
- 1283 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
145
WWUS81 KPHI 260039
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
839 PM EDT THU MAY 25 2017
DEZ001-MDZ008-NJZ016>018-021-022-PAZ070-071-101-102-104-260130-
New Castle-Cecil-Salem-Cumberland-Camden-Atlantic-Gloucester-Eastern
Montgomery-Delaware-Western Chester-Eastern Chester-Philadelphia-
839 PM EDT THU MAY 25 2017
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN NEW CASTLE...
NORTHEASTERN CECIL...NORTHWESTERN ATLANTIC...CENTRAL CUMBERLAND...
SALEM...CAMDEN...GLOUCESTER...SOUTHEASTERN MONTGOMERY...CHESTER...
SOUTHWESTERN PHILADELPHIA AND DELAWARE COUNTIES...
At 838 PM EDT, radar indicated strong thunderstorms were located
along a line extending from Oxford to near Salem to near Cedarville.
Movement was northeast at 30 mph.
Winds up to 45 mph and pea size hail are possible with these storms.
Locations impacted include...
Philadelphia, Camden, Wilmington, Vineland, Newark, Millville,
Bridgeton, West Chester, Gloucester City, Chester, Deptford, West
Deptford, Glassboro, Lindenwold, Hammonton, Pennsville, Coatesville,
Bellmawr, Yeadon and Westtown.
Torrential rainfall is also occurring with these storms, 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.
These storms may re-intensify, so be certain to monitor local radio
stations and available television stations for additional
information and possible warnings from the National Weather Service.
LAT...LON 3983 7604 3987 7599 3992 7600 4013 7589
4003 7517 3988 7503 3968 7476 3924 7511
3960 7556 3959 7558 3960 7558 3962 7557
3967 7551 3972 7551 3963 7561 3959 7561
3974 7608
TIME...MOT...LOC 0038Z 206DEG 27KT 3976 7596 3960 7546 3935 7515
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 8:09 PM EDT | Special Weather Statement | PHI | Cumberland | 36 min |
| May 25, 9:21 PM EDT | Special Weather Statement | PHI | Burlington | 24 min |
| May 25, 10:01 PM EDT | Special Weather Statement | PHI | Ocean | 29 min |
| May 25, 10:11 PM EDT | Special Weather Statement | PHI | Ocean | 34 min |
| May 25, 10:32 PM EDT | Areal Flood Warning | PHI | Hunterdon, Somerset | 4 hr |
| May 25, 10:39 PM EDT | Special Weather Statement | PHI | Mercer | 36 min |
| May 26, 3:03 PM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more | 11 hr |
Nearby
Special Weather Statements in New Jersey, 2017Special Weather Statements in Pennsylvania, 2017Every special weather statement in 2017
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.