Alert archive / Pennsylvania / Special Weather Statements in 2021
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Jun 20, 2021, 9:55 PM EDT for Lebanon 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
- Jun 20, 2021, 9:55 PM EDT (01:55 UTC)
- Expired
- Jun 20, 2021, 10:30 PM EDT
- In force
- 35 min
- Issued by
- NWS Philadelphia/Mount Holly
County Lebanon County, PA
The radar
The State College radar (KCCX), 156 km from the middle of the area, began a volume at 01:57 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, 1.9 hours before the alert went out and 198 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
- 662 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 1494 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
510
WWUS81 KPHI 210155
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
955 PM EDT Sun Jun 20 2021
PAZ060-210230-
Berks-
955 PM EDT Sun Jun 20 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN BERKS COUNTY...
At 955 PM EDT, a strong thunderstorm was located near Pine Grove, or
8 miles north of Myerstown, moving east at 20 mph.
Wind gusts up to 50 mph and pea size hail are possible with this
storm.
Locations impacted include...
Bernville and Strausstown.
This includes Interstate 78 in Pennsylvania between mile markers 8
and 25.
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4052 7634 4052 7625 4056 7613 4056 7609
4040 7608 4039 7628 4049 7643
TIME...MOT...LOC 0155Z 259DEG 19KT 4049 7630
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 4:35 AM EDT | Heat Advisory | PHI | Burlington, Camden, Gloucester, Mercer | 15 hr |
| Jun 21, 7:12 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Cumberland, Gloucester, Salem | 48 min |
| Jun 21, 7:24 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jun 21, 7:38 PM EDT | Severe Thunderstorm Warning | PHI | Warren | 52 min |
| Jun 21, 7:43 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 47 min |
| Jun 21, 7:55 PM EDT | Special Weather Statement | PHI | Atlantic, Burlington, Camden, Mercer, Ocean | 50 min |
| Jun 20, 9:27 PM EDT | Special Weather Statement | PHI | Schuylkill | 33 min |
| Jun 20, 10:04 PM EDT | Areal Flood Advisory | PHI | Berks | 86 min |
| Jun 20, 10:27 PM EDT | Special Weather Statement | PHI | Berks | 33 min |
| Jun 21, 6:08 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 52 min |
| Jun 21, 6:21 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 54 min |
| Jun 21, 7:02 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Northampton | 43 min |
| Jun 21, 6:47 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 58 min |
Nearby
Special Weather Statements in Pennsylvania, 2021Every special weather statement in 2021
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.