Alert archive / Pennsylvania / Special Weather Statements in 2017
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Aug 5, 2017, 1:42 AM EDT for Hunterdon County, Warren County, New Jersey; Bucks County, Montgomery County, Northampton County, Pennsylvania. It was in force for 48 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 5, 2017, 1:42 AM EDT (05:42 UTC)
- Expired
- Aug 5, 2017, 2:30 AM EDT
- In force
- 48 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 91 km from the middle of the area, began a volume at 05:45 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 00:00Z, 5.7 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
- 425 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 695 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
580
WWUS81 KPHI 050542
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
142 AM EDT SAT AUG 5 2017
NJZ007-009-010-PAZ061-062-103>106-050630-
Hunterdon-Somerset-Warren-Lower Bucks-Upper Bucks-Lehigh-Eastern
Montgomery-Western Montgomery-Northampton-
142 AM EDT SAT AUG 5 2017
...A LINE OF HEAVY SHOWERS AND THUNDERSTORMS WILL AFFECT
HUNTERDON...WARREN... SOUTHWESTERN SOMERSET... CENTRAL
MONTGOMERY...EAST CENTRAL LEHIGH...BUCKS AND CENTRAL NORTHAMPTON
COUNTIES...
At 138 AM EDT, radar indicated heavy showers and thunderstorms were
located along a line extending from Steuben to near Lansdale.
Movement was northeast at 40 mph.
Local winds up to 30 mph are possible with these storms.
Locations impacted include...
Easton, Bethlehem, Lansdale, Forks, East Norriton, Quakertown,
Perkasie, Doylestown, Byram, Wilson, Souderton, Bedminster,
Washington, Blairstown, Hellertown, Nazareth, Flemington, Chalfont,
Tinicum and High Bridge.
Heavy rainfall is occurring with these storms, and may cause
localized flooding and will result in times of significantly reduced
visibilities. Do not drive your vehicle through flooded roadways.
Occasional cloud to ground lightning is occurring. Lightning can
strike 10 miles away from a thunderstorm. Seek a safe shelter inside
a building or vehicle.
LAT...LON 4104 7491 4081 7485 4079 7489 4074 7483
4042 7474 4042 7480 4039 7481 4015 7540
4071 7541
TIME...MOT...LOC 0538Z 223DEG 36KT 4070 7534 4022 7533
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 3:32 AM EDT | Special Weather Statement | PHI | Burlington, Camden, Gloucester, Mercer, Middlesex | 58 min |
| Aug 5, 4:15 AM EDT | Special Weather Statement | PHI | Middlesex, Monmouth | 45 min |
| Aug 5, 4:42 AM EDT | Special Marine Warning | PHI | 63 min | |
| Aug 5, 3:24 PM EDT | Small Craft Advisory | PHI | 12 hr | |
| Aug 4, 11:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 69 min |
| Aug 4, 11:49 PM EDT | Special Weather Statement | PHI | Carbon, Lehigh | 56 min |
| Aug 5, 12:10 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 51 min |
| Aug 5, 1:59 AM EDT | Special Weather Statement | PHI | Chester, Montgomery | 46 min |
| Aug 5, 2:38 AM EDT | Special Weather Statement | PHI | Chester | 52 min |
| Aug 5, 2:41 AM EDT | Special Weather Statement | PHI | Bucks, Montgomery, Philadelphia | 49 min |
Nearby
Special Weather Statements in Pennsylvania, 2017Special Weather Statements in New Jersey, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.