Alert archive / Pennsylvania / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

October 19, 2012Berks County, Carbon County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 19, 2012, 1:30 AM EDT for Berks County, Carbon County, Lehigh County, Pennsylvania. It was in force for 45 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
Oct 19, 2012, 1:30 AM EDT (05:30 UTC)
Expired
Oct 19, 2012, 2:15 AM EDT
In force
45 min
Issued by
NWS Philadelphia/Mount Holly

Counties Berks County, PA, Carbon County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 150 km from the middle of the area, began a volume at 05:32 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

Brookhaven, NY (KOKX), launched 00:00Z, 5.5 hours before the alert went out and 244 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, Brookhaven, NY at 00:00Z on 2012-10-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2012-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 217 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
580 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
217 m²/s²
0-3 km storm-relative helicity
237 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

572 
WWUS81 KPHI 190530
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
130 AM EDT FRI OCT 19 2012

PAZ054-060>062-190615-
BERKS PA-CARBON PA-LEHIGH PA-NORTHAMPTON PA-
130 AM EDT FRI OCT 19 2012

...A LINE OF HEAVY SHOWERS AND THUNDERSTORMS WILL AFFECT 
BERKS...CARBON...LEHIGH AND NORTHAMPTON COUNTIES...

AT 125 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
HEAVY SHOWERS AND THUNDERSTORMS ALONG A LINE EXTENDING ACROSS 
CENTRAL BERKS COUNTY. SOME ADDITIONAL THUNDERSTORMS WERE MOVING 
ACROSS CARBON COUNTY. THIS ACTIVITY IS MOVING NORTHEASTWARD AT
40 MPH.

THE LINE OF HEAVY SHOWERS AND THUNDERSTORMS WILL BE NEAR 
TRESCKOW...WEST READING...TEMPLE...READING AROUND 135 AM...BEAVER 
MEADOWS...MOUNT PENN...LENHARTSVILLE...LANSFORD AROUND 140 
AM...WANAMAKERS AND NEW MAHONING AROUND 145 AM.

LOCAL WIND GUSTS UP TO 35 MPH ARE POSSIBLE.

CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. MOVE 
INDOORS IMMEDIATELY FOR YOUR SAFETY. IF YOU CAN HEAR THUNDER...YOU 
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO 
POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.

LAT...LON 4110 7561 4096 7555 4094 7557 4090 7553
      4054 7539 4019 7596 4027 7609 4057 7608
      4059 7602 4065 7599 4074 7577 4091 7600
      4101 7575 4108 7578 4113 7570 4114 7567

$$

FORECASTER: GORSE

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 19, 4:15 AM EDTCoastal Flood StatementPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more14 hr
Oct 19, 11:52 AM EDTAreal Flood AdvisoryPHIHunterdon, Morris, Somerset105 min
Oct 19, 12:48 AM EDTSpecial Weather StatementPHICarbon42 min
Oct 19, 2:00 AM EDTSpecial Weather StatementPHICarbon, Lehigh, Monroe, Northampton45 min
Oct 19, 3:33 AM EDTAreal Flood AdvisoryPHIBerks, Carbon, Lehigh, Monroe, Northampton3 hr
Oct 19, 7:40 PM EDTSpecial Weather StatementPHICecil95 min

Nearby

Special Weather Statements in Pennsylvania, 2012Every special weather statement in 2012

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.