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 7, 2018, 5:41 PM EDT for Lehigh County, Pennsylvania. It was in force for 49 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 7, 2018, 5:41 PM EDT (21:41 UTC)
- Expired
- Aug 7, 2018, 6:30 PM EDT
- In force
- 49 min
- Issued by
- NWS Philadelphia/Mount Holly
County Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 129 km from the middle of the area, began a volume at 21:43 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 12:00Z, 9.7 hours before the alert went out and 237 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
- 1323 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 955 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
331
WWUS81 KPHI 072141
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
541 PM EDT TUE AUG 7 2018
PAZ060-061-072230-
Lehigh-Berks-
541 PM EDT TUE AUG 7 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN BERKS AND LEHIGH
COUNTIES...
At 540 PM EDT, a strong thunderstorm was located near Kutztown,
moving east at 12 mph.
Winds up to 40 mph and half inch hail are possible with this storm.
Locations that may be impacted include...
Allentown, Emmaus, Northampton, Kutztown, Topton, Lyons, Coffeetown,
New Tripoli, Zionsville, Ancient Oaks, Schnecksville, Claussville,
Coplay, Macungie, North Catasauqua, Alburtis, Fullerton and
Hokendauqua.
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 4069 7583 4068 7550 4067 7548 4044 7550
4049 7585
TIME...MOT...LOC 2140Z 275DEG 10KT 4058 7579
$$
IovinoThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 12:19 PM EDT | Heat Advisory | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 6 more | 6 hr |
| Aug 7, 2:24 PM EDT | Areal Flood Advisory | PHI | Sussex | 78 min |
| Aug 7, 3:31 PM EDT | Heat Advisory | PHI | Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 4 more | 26 hr |
| Aug 7, 4:27 PM EDT | Special Weather Statement | PHI | Sussex | 48 min |
| Aug 7, 5:07 PM EDT | Special Weather Statement | PHI | Sussex | 53 min |
| Aug 7, 5:46 PM EDT | Special Weather Statement | PHI | Morris, Sussex | 59 min |
| Aug 7, 4:07 PM EDT | Special Weather Statement | PHI | Monroe | 38 min |
| Aug 7, 4:44 PM EDT | Special Weather Statement | PHI | Monroe | 61 min |
| Aug 7, 4:48 PM EDT | Special Weather Statement | PHI | Lehigh | 57 min |
| Aug 7, 5:32 PM EDT | Special Weather Statement | PHI | Berks | 58 min |
| Aug 7, 6:21 PM EDT | Special Weather Statement | PHI | Lehigh | 54 min |
| Aug 7, 6:25 PM EDT | Special Weather Statement | PHI | Berks | 65 min |
| Aug 7, 2:13 PM EDT | Special Weather Statement | PHI | Sussex | 47 min |
| Aug 7, 4:50 PM EDT | Special Weather Statement | PHI | Kent | 55 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.