Alert archive / Pennsylvania / Special Weather Statements in 2016

Special Weather Statement, NWS Philadelphia/Mount Holly

August 6, 2016Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 6, 2016, 4:30 PM EDT for Berks County, Pennsylvania. It was in force for 30 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 6, 2016, 4:30 PM EDT (20:30 UTC)
Expired
Aug 6, 2016, 5:00 PM EDT
In force
30 min
Issued by
NWS Philadelphia/Mount Holly

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 121 km from the middle of the area, began a volume at 20:30 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, 8.5 hours before the alert went out and 218 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-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2016-08-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 157 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2016-08-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
157 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
934 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

194 
WWUS81 KPHI 062030
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
430 PM EDT SAT AUG 6 2016
 
PAZ060-101-103-062100-
BERKS-WESTERN CHESTER-WESTERN MONTGOMERY-
430 PM EDT SAT AUG 6 2016

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL CHESTER...SOUTHERN
LEHIGH...EAST CENTRAL BERKS AND NORTHWESTERN MONTGOMERY COUNTIES...

AT 430 PM EDT...A STRONG THUNDERSTORM WAS OVER FLEETWOOD...OR 9 MILES
NORTHEAST OF READING...MOVING SOUTHEAST AT 25 MPH.

WIND GUSTS UP TO 40 MPH AND PEA SIZE HAIL ARE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
READING...POTTSTOWN...KUTZTOWN...FLEETWOOD...LAURELDALE...
EAST GREENVILLE...TOPTON...BALLY...BECHTELSVILLE...GREEN LANE...
LYONS...GILBERTSVILLE...STOWE...BOYERTOWN...PENNSBURG...RED HILL...
AMITY GARDENS...POTTSGROVE...HALFWAY HOUSE AND SANATOGA.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4054 7585 4046 7555 4039 7544 4019 7557
      4038 7595
TIME...MOT...LOC 2030Z 296DEG 21KT 4043 7582 
$$

SFJ

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 2:24 PM EDTSpecial Weather StatementPHISussex36 min
Aug 6, 2:50 PM EDTSpecial Weather StatementPHIMorris, Sussex, Warren40 min
Aug 6, 3:21 PM EDTSpecial Weather StatementPHIHunterdon, Morris, Somerset39 min
Aug 6, 3:55 PM EDTSpecial Weather StatementPHIHunterdon, Middlesex, Morris, Somerset50 min
Aug 6, 4:40 PM EDTSpecial Weather StatementPHIMiddlesex, Monmouth50 min
Aug 6, 5:40 PM EDTSpecial Weather StatementPHIMercer50 min
Aug 6, 5:41 PM EDTSpecial Weather StatementPHIMonmouth49 min
Aug 6, 6:32 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester4 hr
Aug 6, 6:52 PM EDTSpecial Weather StatementPHIMercer23 min
Aug 6, 7:10 PM EDTSpecial Weather StatementPHIOcean50 min
Aug 6, 7:33 PM EDTSpecial Marine WarningPHI57 min
Aug 6, 7:40 PM EDTSpecial Weather StatementPHIOcean35 min
Aug 6, 4:26 PM EDTSpecial Weather StatementPHILehigh34 min
Aug 6, 4:51 PM EDTSpecial Weather StatementPHIMontgomery24 min
Aug 6, 4:55 PM EDTSpecial Weather StatementPHILehigh35 min
Aug 6, 4:59 PM EDTSevere Thunderstorm WarningPHIBucks, Lehigh, Northampton46 min
Aug 6, 5:26 PM EDTSpecial Weather StatementPHIBerks34 min
Aug 6, 5:56 PM EDTSpecial Weather StatementPHIMontgomery34 min
Aug 6, 6:25 PM EDTSpecial Weather StatementPHIDelaware, Montgomery, Philadelphia35 min
Aug 6, 6:49 PM EDTSpecial Weather StatementPHIKent26 min

Nearby

Special Weather Statements in Pennsylvania, 2016Every special weather statement in 2016

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.