Alert archive / Pennsylvania / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

October 19, 2012Carbon County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Oct 19, 2012, 12:48 AM EDT for Carbon County, Pennsylvania. It was in force for 42 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, 12:48 AM EDT (04:48 UTC)
Expired: Oct 19, 2012, 1:30 AM EDT
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly

County Carbon County, PA

The radar

The Philadelphia radar (KDIX), 154 km from the middle of the area, began a volume at 04:49 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, 4.8 hours before the alert went out and 233 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: 203 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 714 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 334 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

968 
WWUS81 KPHI 190448
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1248 AM EDT FRI OCT 19 2012

PAZ054-060-061-190530-
BERKS PA-CARBON PA-LEHIGH PA-
1248 AM EDT FRI OCT 19 2012

...STRONG THUNDERSTORMS WILL AFFECT PORTIONS OF BERKS...CARBON AND 
LEHIGH COUNTIES...

AT 1245 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
STRONG THUNDERSTORMS ACROSS WESTERN BERKS COUNTY...MOVING NORTHEAST 
AT 45 MPH.

LOCAL WIND GUSTS UP TO 35 MPH ARE POSSIBLE.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. 
DO NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...STAY 
INDOORS.

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

LAT...LON 4054 7622 4058 7606 4058 7602 4065 7599
      4074 7577 4084 7592 4091 7600 4099 7583
      4101 7573 4087 7551 4086 7551 4035 7603
      4051 7623

$$

FORECASTER: GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 19, 4:15 AM EDT	Coastal Flood Statement	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more	14 hr
Oct 19, 11:52 AM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	105 min
Oct 19, 1:30 AM EDT	Special Weather Statement	PHI	Berks, Carbon, Lehigh	45 min
Oct 19, 2:00 AM EDT	Special Weather Statement	PHI	Carbon, Lehigh, Monroe, Northampton	45 min
Oct 19, 3:33 AM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	3 hr
Oct 19, 7:40 PM EDT	Special Weather Statement	PHI	Cecil	95 min

Nearby

Special Weather Statements in Pennsylvania, 2012 Every 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.