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 Oct 15, 2018, 10:55 PM EDT for Delaware County, Philadelphia County, Pennsylvania. It was in force for 35 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
- Oct 15, 2018, 10:55 PM EDT (02:55 UTC)
- Expired
- Oct 15, 2018, 11:30 PM EDT
- In force
- 35 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 78 km from the middle of the area, began a volume at 02:59 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 00:00Z, 2.9 hours before the alert went out and 217 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
- 16 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 1083 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 225 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
539
WWUS81 KPHI 160255
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
1055 PM EDT MON OCT 15 2018
NJZ015-018-019-PAZ070-071-102>104-106-160330-
Northwestern Burlington-Camden-Mercer-Lower Bucks-Eastern
Montgomery-Western Montgomery-Delaware-Eastern Chester-Philadelphia-
1055 PM EDT MON OCT 15 2018
...A LINE OF SHOWERS WILL AFFECT NORTHWESTERN CAMDEN...SOUTH CENTRAL
MERCER...NORTHWESTERN BURLINGTON...SOUTHEASTERN MONTGOMERY...
SOUTHEASTERN BUCKS...EAST CENTRAL CHESTER...PHILADELPHIA AND CENTRAL
DELAWARE COUNTIES...
At 1055 PM EDT, radar indicated showers were located along a line
extending from East Norriton to West Chester. Movement was east at 45
mph.
Winds up to 40 mph are possible with these showers.
Locations impacted include...
Philadelphia, Trenton, Camden, West Chester, Gloucester City,
Bensalem, Norristown, West Norriton, East Norriton, Yeadon, Westtown,
Bristol, Riverside, Conshohocken, Palmyra, Hatboro, Folcroft, Ambler,
Swarthmore and Jenkintown.
LAT...LON 3988 7515 3993 7571 4008 7553 4010 7546
4013 7547 4021 7537 4022 7468
TIME...MOT...LOC 0255Z 266DEG 40KT 4015 7533 3995 7564
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 15, 11:19 PM EDT | Special Weather Statement | PHI | Mercer, Middlesex, Monmouth | 56 min |
| Oct 15, 11:39 PM EDT | Special Weather Statement | PHI | Salem | 36 min |
| Oct 15, 11:41 PM EDT | Special Marine Warning | PHI | 94 min | |
| Oct 16, 12:01 AM EDT | Special Weather Statement | PHI | Burlington, Camden, Gloucester, Ocean, Salem | 44 min |
| Oct 16, 12:41 AM EDT | Special Weather Statement | PHI | Atlantic, Cape May, Cumberland, Ocean | 49 min |
| Oct 16, 1:22 AM EDT | Special Weather Statement | PHI | Cape May | 38 min |
| Oct 16, 3:58 PM EDT | Gale Warning | PHI | 40 hr | |
| Oct 16, 3:58 PM EDT | Small Craft Advisory | PHI | 24 hr | |
| Oct 16, 1:05 AM EDT | Special Weather Statement | PHI | Kent, Sussex | 40 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.