Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

August 6, 2011Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 6, 2011, 10:06 PM EDT for Berks County, Pennsylvania. It was in force for 84 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, 2011, 10:06 PM EDT (02:06 UTC)
Expired
Aug 6, 2011, 11:30 PM EDT
In force
84 min
Issued by
NWS Philadelphia/Mount Holly

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 153 km from the middle of the area, began a volume at 02:08 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 00:00Z, 2.1 hours before the alert went out and 203 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 00:00Z on 2011-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1834 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 00:00Z on 2011-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 109 square meters per square second.193958Sfc1 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
1834 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
508 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
109 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.8

Open this sounding in Storm Lab

The text

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

945 
WWUS81 KPHI 070206
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1006 PM EDT SAT AUG 6 2011

PAZ060-061-070330-
BERKS PA-LEHIGH PA-
1006 PM EDT SAT AUG 6 2011

...SHOWERS WITH HEAVY RAINFALL WILL AFFECT BERKS AND LEHIGH
COUNTIES...

AT 1002 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH HEAVY RAINFALL ALONG A LINE EXTENDING FROM 15 MILES
NORTH OF READING TO 29 MILES NORTHWEST OF LANCASTER...MOVING EAST AT
20 MPH. THE SHOWERS WILL BE NEAR BERNVILLE AROUND 1025 PM...
CLAUSSVILLE AROUND 1040 PM...KUTZTOWN AROUND 1100 PM...LEESPORT
AROUND 1105 PM...WOMELSDORF AROUND 1110 PM...TOPTON...LYONS...
FLEETWOOD AND ANCIENT OAKS AROUND 1130 PM.

VERY HEAVY RAIN WILL FALL FROM THESE SHOWERS...AND WILL CAUSE WATER
TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
THERE MAY BE AN EMBEDDED THUNDERSTORM AS WELL. 

LAT...LON 4052 7639 4054 7618 4060 7605 4059 7603
      4065 7600 4070 7586 4052 7543 4029 7588
      4023 7601 4023 7604 4036 7621 4036 7623
      4049 7643

$$

FORECASTER:  DRAG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 6, 8:49 PM EDTFlood WatchPHIMorris, Sussex, Warren9 hr
Aug 6, 10:33 PM EDTAreal Flood AdvisoryPHIWarren6 hr
Aug 7, 12:42 AM EDTSpecial Weather StatementPHIMorris63 min
Aug 7, 1:32 AM EDTAreal Flood AdvisoryPHIHunterdon, Warren3 hr
Aug 7, 1:54 AM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Sussex, Warren3 hr
Aug 7, 3:56 AM EDTSpecial Weather StatementPHIHunterdon64 min
Aug 7, 4:45 AM EDTSpecial Weather StatementPHIHunterdon, Somerset60 min
Aug 7, 5:10 AM EDTAreal Flood AdvisoryPHIMorris, Somerset81 min
Aug 7, 5:30 AM EDTSpecial Weather StatementPHIMercer, Middlesex60 min
Aug 7, 6:03 AM EDTFlash Flood WatchPHISussex, Warren14 hr
Aug 7, 3:25 PM EDTSpecial Weather StatementPHIMercer35 min
Aug 7, 3:34 PM EDTSpecial Weather StatementPHIWarren26 min
Aug 7, 3:48 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Monmouth, Ocean27 min
Aug 7, 4:19 PM EDTSpecial Weather StatementPHIMonmouth41 min
Aug 7, 5:02 PM EDTSpecial Weather StatementPHISussex28 min
Aug 7, 6:49 PM EDTSpecial Weather StatementPHISussex41 min
Aug 7, 7:11 PM EDTSpecial Weather StatementPHISussex49 min
Aug 7, 7:35 PM EDTSpecial Weather StatementPHISussex25 min
Aug 6, 10:14 PM EDTSpecial Weather StatementPHIPike61 min
Aug 7, 12:48 AM EDTSpecial Weather StatementPHIMontgomery57 min
Aug 7, 2:29 AM EDTFlash Flood WarningPHIBerks, Lehigh, Northampton3 hr
Aug 7, 3:07 PM EDTSpecial Weather StatementPHIPhiladelphia23 min
Aug 7, 7:20 PM EDTSpecial Weather StatementPHIMonroe40 min
Aug 7, 3:02 PM EDTSpecial Weather StatementPHICecil28 min
Aug 7, 4:50 PM EDTSpecial Weather StatementPHICecil40 min
Aug 7, 5:39 PM EDTSpecial Weather StatementPHICecil36 min
Aug 7, 6:31 PM EDTSpecial Weather StatementPHIKent29 min

Nearby

Special Weather Statements in Pennsylvania, 2011Every 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.