Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

June 28, 2011Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 28, 2011, 6:32 PM EDT for Berks County, Pennsylvania. It was in force for 58 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 28, 2011, 6:32 PM EDT (22:32 UTC)
Expired: Jun 28, 2011, 7:30 PM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 137 km from the middle of the area, began a volume at 22:33 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.5 hours before the alert went out and 90 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: 212 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 802 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

676 
WWUS81 KPHI 282232
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
632 PM EDT TUE JUN 28 2011

PAZ060-282330-
BERKS PA-
632 PM EDT TUE JUN 28 2011

...THUNDERSTORM TO CROSS BERKS COUNTY...

AT 624 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
THUNDERSTORM 16 MILES NORTH OF LANCASTER...MOVING EAST AT 20 MPH. 
THE THUNDERSTORM WILL BE NEAR WERNERSVILLE...SINKING SPRING AROUND 
645 PM...MOHNTON...SHILLINGTON AROUND 700 PM...BIRDSBORO...FLYING 
HILLS AROUND 715 PM AND AMITY GARDENS AROUND 730 PM.

VERY HEAVY RAIN MAY ACCOMPANY THIS STORM...POSSIBLY CAUSING WATER 
TO POND ON ROADWAYS AND IN POOR DRAINAGE AREAS.

WIND GUSTS TO 30 MPH ARE POSSIBLE WITH THESE STORMS AS IS LIGHTNING.
DO NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE 
INDOORS WHEN A THUNDERSTORM APPROACHES.

LAT...LON 4027 7568 4014 7590 4030 7614 4033 7618
      4035 7619

$$

RPW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 10:08 AM EDT	Special Weather Statement	PHI	Camden, Cumberland, Gloucester, Salem	82 min
Jun 28, 11:19 AM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Ocean	56 min
Jun 28, 1:53 PM EDT	Special Weather Statement	PHI	Atlantic, Cape May	97 min
Jun 28, 7:32 PM EDT	Special Weather Statement	PHI	Berks	58 min
Jun 28, 9:17 AM EDT	Special Weather Statement	PHI	Cecil	58 min
Jun 28, 7:26 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	64 min

Nearby

Special Weather Statements in Pennsylvania, 2011 Every special weather statement in 2011

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.