Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

March 28, 2021Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Mar 28, 2021, 5:04 PM EDT for Berks County, Pennsylvania. It was in force for 41 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: Mar 28, 2021, 5:04 PM EDT (21:04 UTC)
Expired: Mar 28, 2021, 5:45 PM EDT
In force: 41 min
Issued by: NWS Philadelphia/Mount Holly

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 154 km from the middle of the area, began a volume at 21:04 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, 9.1 hours before the alert went out and 211 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 500 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 255 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

438 
WWUS81 KPHI 282104
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
504 PM EDT Sun Mar 28 2021

PAZ060-061-282145-
Lehigh-Berks-
504 PM EDT Sun Mar 28 2021

...A LINE OF SHOWERS WITH STRONG WINDS WILL AFFECT BERKS AND WESTERN 
LEHIGH COUNTIES...

At 503 PM EDT, radar indicated showers were located along a line
extending from Minersville to near Pine Grove to near Harper Tavern.
Movement was east at 55 mph.

Wind gusts up to 45 mph are possible with this line of showers.

Locations impacted include...
Reading, Wyomissing, Kutztown, Hamburg, Fleetwood, Sinking Spring,
Laureldale, Womelsdorf, Wernersville, Topton, Robesonia, Leesport,
Shoemakersville, Bernville, Lyons, Strausstown, Lenhartsville, Spring
Ridge, New Tripoli and Claussville.

This includes Interstate 78 in Pennsylvania between mile markers 10
and 49.
 
If outdoors, consider seeking shelter inside a building.

LAT...LON 4049 7643 4051 7636 4052 7625 4056 7609
      4058 7606 4057 7602 4065 7598 4070 7583
      4073 7576 4067 7567 4051 7562 4024 7603
      4036 7621
TIME...MOT...LOC 2103Z 265DEG 46KT 4070 7627 4049 7633 4040 7650 

$$

Staarmann

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 2:39 AM EDT	Gale Warning	PHI		35 hr
Mar 28, 6:21 PM EDT	Special Marine Warning	PHI		54 min
Mar 28, 6:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Warren	47 min
Mar 28, 6:47 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer, Monmouth, Salem	43 min
Mar 28, 7:17 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Monmouth, Ocean, Somerset	60 min
Mar 28, 7:20 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Monmouth, Ocean	70 min
Mar 28, 7:38 PM EDT	Special Marine Warning	PHI		111 min
Mar 28, 5:13 PM EDT	Special Weather Statement	PHI	Carbon	32 min
Mar 28, 5:45 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	30 min
Mar 28, 6:02 PM EDT	Special Weather Statement	PHI	Chester	28 min
Mar 28, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery	48 min
Mar 28, 6:15 PM EDT	Special Weather Statement	PHI	Montgomery	30 min
Mar 28, 7:54 PM EDT	Special Weather Statement	PHI	Sussex	36 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.