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 1, 2018, 8:59 PM EDT for Berks County, Pennsylvania. It was in force for 61 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 1, 2018, 8:59 PM EDT (00:59 UTC)
- Expired
- Aug 1, 2018, 10:00 PM EDT
- In force
- 61 min
- Issued by
- NWS Philadelphia/Mount Holly
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 159 km from the middle of the area, began a volume at 01:02 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, 1.0 hours before the alert went out and 206 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
- 883 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1170 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 4.2
The text
As transmitted.
434
WWUS81 KPHI 020059
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
859 PM EDT WED AUG 1 2018
PAZ060-020200-
Berks-
859 PM EDT WED AUG 1 2018
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT WESTERN BERKS COUNTY...
At 858 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Williamstown to Fort Indiantown Gap
to near Emigsville. Movement was northeast at 30 mph.
Winds up to 40 mph are possible with these storms.
Locations impacted include...
Hamburg, Sinking Spring, Womelsdorf, Wernersville, Newmanstown,
Leesport, Shoemakersville, Bernville, Strausstown, Fairview Hgts and
Centerport.
Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4052 7634 4052 7625 4058 7605 4057 7602
4063 7600 4065 7598 4068 7590 4066 7587
4026 7606 4036 7621 4037 7623 4049 7643
TIME...MOT...LOC 0058Z 246DEG 27KT 4063 7660 4043 7660 4004 7679
$$
MeolaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 10:40 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 37 min |
| Aug 1, 11:35 PM EDT | Severe Thunderstorm Warning | PHI | Salem | 20 min |
| Aug 2, 3:31 AM EDT | Flash Flood Watch | PHI | Morris, Sussex, Warren | 55 hr |
| Aug 2, 1:41 PM EDT | Special Weather Statement | PHI | Burlington | 34 min |
| Aug 2, 2:09 PM EDT | Special Weather Statement | PHI | Monmouth | 36 min |
| Aug 2, 3:41 PM EDT | Special Weather Statement | PHI | Morris | 34 min |
| Aug 2, 6:02 PM EDT | Special Marine Warning | PHI | 58 min | |
| Aug 1, 9:54 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh | 66 min |
| Aug 2, 1:50 PM EDT | Special Weather Statement | PHI | Lehigh | 25 min |
| Aug 2, 2:19 PM EDT | Special Weather Statement | PHI | Northampton | 41 min |
| Aug 1, 10:58 PM EDT | Severe Thunderstorm Warning | PHI | New Castle | 47 min |
| Aug 2, 5:36 PM EDT | Special Weather Statement | PHI | New Castle | 24 min |
| Aug 2, 5:40 PM EDT | Special Weather Statement | PHI | Kent | 35 min |
| Aug 2, 4:37 PM EDT | Special Weather Statement | PHI | Queen Anne's | 23 min |
| Aug 2, 5:03 PM EDT | Special Weather Statement | PHI | Kent | 27 min |
| Aug 2, 5:34 PM EDT | Special Weather Statement | PHI | Queen Anne's | 26 min |
| Aug 2, 6:07 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 38 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.