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 Aug 11, 2021, 4:58 PM EDT for Berks County, Pennsylvania. It was in force for 47 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 11, 2021, 4:58 PM EDT (20:58 UTC)
- Expired
- Aug 11, 2021, 5:45 PM EDT
- In force
- 47 min
- Issued by
- NWS Philadelphia/Mount Holly
- Hail
- 0.00 in
- Wind
- 40
County Berks County, PA
The radar
The State College radar (KCCX), 161 km from the middle of the area, began a volume at 20:58 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, 9.0 hours before the alert went out and 202 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
- 553 J/kg
- Mixed-layer CIN
- -190 J/kg
- Mixed-layer LCL
- 1301 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
723
WWUS81 KPHI 112058
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
458 PM EDT Wed Aug 11 2021
PAZ060-112145-
Berks PA-
458 PM EDT Wed Aug 11 2021
...Strong thunderstorms will impact portions of northwestern Berks
County through 545 PM EDT...
At 458 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Pine Grove to Annville. Movement was east
at 15 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Hamburg, Womelsdorf, Robesonia, Bernville and Strausstown.
This includes Interstate 78 in Pennsylvania between mile markers 10
and 31.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
eastern Pennsylvania.
&&
LAT...LON 4049 7643 4051 7636 4052 7625 4056 7609
4058 7606 4057 7602 4060 7601 4060 7596
4030 7613 4036 7621
TIME...MOT...LOC 2058Z 253DEG 12KT 4057 7632 4033 7652
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
$$
JEOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 8:02 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester | 43 min |
| Aug 10, 8:18 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 42 min |
| Aug 10, 8:23 PM EDT | Special Marine Warning | PHI | 79 min | |
| Aug 10, 8:36 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 39 min |
| Aug 10, 8:43 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester | 2 hr |
| Aug 10, 9:07 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Cumberland | 23 min |
| Aug 11, 2:56 PM EDT | Excessive Heat Watch | PHI | Hunterdon, Morris, Warren | 12 hr |
| Aug 11, 5:57 PM EDT | Special Weather Statement | PHI | Sussex | 48 min |
| Aug 11, 6:32 PM EDT | Special Weather Statement | PHI | Morris, Sussex, Warren | 28 min |
| Aug 11, 6:50 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 3 hr |
| Aug 11, 7:04 PM EDT | Areal Flood Advisory | PHI | Gloucester, Hunterdon, Salem | 2 hr |
| Aug 11, 7:04 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 41 min |
| Aug 11, 7:11 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 49 min |
| Aug 11, 7:28 PM EDT | Flash Flood Warning | PHI | Morris, Warren | 3 hr |
| Aug 11, 7:45 PM EDT | Special Weather Statement | PHI | Morris | 45 min |
| Aug 11, 7:52 PM EDT | Special Weather Statement | PHI | Atlantic, Burlington, Camden, Gloucester, Mercer | 53 min |
| Aug 11, 7:57 PM EDT | Special Weather Statement | PHI | Hunterdon, Middlesex, Somerset | 48 min |
| Aug 11, 4:46 PM EDT | Special Weather Statement | PHI | Monroe | 44 min |
| Aug 11, 5:20 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 57 min |
| Aug 11, 5:48 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 57 min |
| Aug 11, 6:16 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Montgomery | 44 min |
| Aug 11, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Delaware, Montgomery | 49 min |
| Aug 11, 6:48 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Montgomery, Northampton | 42 min |
| Aug 10, 8:11 PM EDT | Special Weather Statement | PHI | New Castle | 34 min |
| Aug 10, 9:09 PM EDT | Special Weather Statement | PHI | Sussex | 36 min |
| Aug 10, 8:13 PM EDT | Special Weather Statement | PHI | Caroline, Talbot | 32 min |
| Aug 10, 8:43 PM EDT | Special Weather Statement | PHI | Caroline | 32 min |
| Aug 11, 6:11 PM EDT | Special Weather Statement | PHI | Caroline, Kent, Queen Anne's | 64 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.