Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

June 3, 2021Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 3, 2021, 3:02 PM EDT for Berks County, Pennsylvania. It was in force for 43 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 3, 2021, 3:02 PM EDT (19:02 UTC)
Expired: Jun 3, 2021, 3:45 PM EDT
In force: 43 min
Issued by: NWS Philadelphia/Mount Holly

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 155 km from the middle of the area, began a volume at 19:04 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, 7.0 hours before the alert went out and 205 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 73 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 511 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

286 
WWUS81 KPHI 031902
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
302 PM EDT Thu Jun 3 2021

PAZ060-031945-
Berks-
302 PM EDT Thu Jun 3 2021

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL BERKS COUNTY...

At 301 PM EDT, a strong thunderstorm was located over Bernville, or 9
miles east of Myerstown, moving east at 35 mph.

Wind gusts up to 50 mph and half inch hail are possible with this
storm.

Locations impacted include...
Reading, Wyomissing, Hamburg, Fleetwood, Sinking Spring, Laureldale,
Womelsdorf, Wernersville, Robesonia, Leesport, Shoemakersville,
Bernville, Strausstown, Lenhartsville, Fairview Hgts, Spring Ridge,
West Reading, Centerport, Wyomissing Hills and Whitfield.

This includes Interstate 78 in Pennsylvania between mile markers 17
and 37.
 
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 4054 7618 4056 7609 4058 7606 4057 7602
      4063 7600 4067 7592 4036 7574 4031 7615
      4036 7621 4039 7627 4044 7631
TIME...MOT...LOC 1901Z 249DEG 31KT 4042 7614 

$$

Davis

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 3, 9:37 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Salem	12 hr
Jun 3, 5:55 PM EDT	Special Marine Warning	PHI		65 min
Jun 3, 6:33 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Salem	42 min
Jun 3, 7:07 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	38 min
Jun 3, 7:09 PM EDT	Flash Flood Warning	PHI	Camden, Gloucester, Salem	2 hr
Jun 3, 7:13 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Somerset	3 hr
Jun 3, 7:52 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	38 min
Jun 3, 3:54 PM EDT	Special Weather Statement	PHI	Berks	36 min
Jun 3, 5:14 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester	27 min
Jun 3, 5:20 PM EDT	Areal Flood Advisory	PHI	Berks, Chester, Delaware, Montgomery, Philadelphia	3 hr
Jun 3, 5:59 PM EDT	Flash Flood Warning	PHI	Berks, Chester	108 min
Jun 3, 6:19 PM EDT	Flash Flood Warning	PHI	Berks, Chester, Montgomery	115 min
Jun 3, 5:33 PM EDT	Special Weather Statement	PHI	Sussex	42 min

Nearby

Special Weather Statements in Pennsylvania, 2021 Every 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.