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 4, 2017, 11:49 PM EDT for Carbon County, Lehigh County, Pennsylvania. It was in force for 56 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 4, 2017, 11:49 PM EDT (03:49 UTC)
- Expired
- Aug 5, 2017, 12:45 AM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Carbon County, PA, Lehigh County, PA
The radar
The Binghamton radar (KBGM), 146 km from the middle of the area, began a volume at 03:52 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, 3.8 hours before the alert went out and 235 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.
918
WWUS81 KPHI 050349
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
1149 PM EDT FRI AUG 4 2017
PAZ054-061-062-050445-
Lehigh-Northampton-Carbon-
1149 PM EDT FRI AUG 4 2017
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN LEHIGH...
CARBON AND WEST CENTRAL NORTHAMPTON COUNTIES...
At 1148 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Sheppton to McKeansburg to near
Shoemakersville. Movement was northeast at 25 mph.
Winds up to 40 mph are possible with these storms.
These storms will be near...
New Mahoning around 1220 AM EDT.
Nesquehoning, Weatherly and Wanamakers around 1225 AM EDT.
Lehighton around 1230 AM EDT.
Jim Thorpe around 1235 AM EDT.
Palmerton, Slatington, Walnutport and New Tripoli around 1240 AM
EDT.
Beltzville State Park, Jordan Valley, Schnecksville, Neffs,
Claussville, Penn Forest Reservoir, Emerald, Coffeetown and
Christmans around 1245 AM EDT.
Other locations impacted by these storms include Beaver Meadows,
Coplay, Hokendauqua, Summit Hill, Bowmanstown, Trachsville,
Weissport, Parryville, North Catasauqua and Weissport East.
Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.
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 4109 7560 4100 7551 4098 7550 4095 7557
4082 7548 4082 7542 4070 7539 4056 7571
4068 7589 4074 7576 4083 7590 4091 7599
4101 7573 4105 7577 4109 7577 4113 7567
TIME...MOT...LOC 0348Z 235DEG 21KT 4087 7611 4069 7600 4049 7605
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 1:42 AM EDT | Special Weather Statement | PHI | Hunterdon, Warren | 48 min |
| 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 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, 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.