Alert archive / Pennsylvania / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 3, 2012Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 3, 2012, 7:33 PM EDT for Bucks County, Pennsylvania. It was in force for 57 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 3, 2012, 7:33 PM EDT (23:33 UTC)
Expired: Aug 3, 2012, 8:30 PM EDT
In force: 57 min
Issued by: NWS Philadelphia/Mount Holly

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 94 km from the middle of the area, began a volume at 23:35 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, 11.6 hours before the alert went out and 143 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: 1112 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 961 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 37 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.

391 
WWUS81 KPHI 032333
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
733 PM EDT FRI AUG 3 2012

NJZ007-009-PAZ062-069-040030-
BUCKS PA-HUNTERDON NJ-NORTHAMPTON PA-WARREN NJ-
733 PM EDT FRI AUG 3 2012

...A STRONG THUNDERSTORM WILL AFFECT BUCKS...HUNTERDON...NORTHAMPTON
AND WARREN COUNTIES...

AT 729 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 16 MILES SOUTH OF EASTON...MOVING NORTH AT 5 MPH.
THE THUNDERSTORM WILL BE NEAR ERWINNA AROUND 745 PM...REVERE AROUND
755 PM...FRENCHTOWN AROUND 800 PM...FERNDALE...FERNDALE AROUND 805
PM...MILFORD...SPRINGTOWN AROUND 825 PM AND RIEGELSVILLE AROUND 830
PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. DO
NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS
WHEN A THUNDERSTORM APPROACHES.

LAT...LON 4067 7530 4068 7505 4037 7503 4037 7527

$$

FORECASTER: HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 3:38 PM EDT	Special Weather Statement	PHI	Burlington	67 min
Aug 3, 4:17 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	58 min
Aug 3, 4:21 PM EDT	Special Marine Warning	PHI		84 min
Aug 3, 4:35 PM EDT	Special Weather Statement	PHI	Monmouth	55 min
Aug 3, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	60 min
Aug 3, 5:12 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	63 min
Aug 3, 5:35 PM EDT	Special Weather Statement	PHI	Mercer	55 min
Aug 3, 5:42 PM EDT	Special Weather Statement	PHI	Mercer	63 min
Aug 3, 5:46 PM EDT	Areal Flood Advisory	PHI	Gloucester	101 min
Aug 3, 5:55 PM EDT	Special Weather Statement	PHI	Burlington	65 min
Aug 3, 6:20 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer	2 hr
Aug 3, 6:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Mercer	43 min
Aug 3, 2:39 PM EDT	Special Weather Statement	PHI	Chester	66 min
Aug 3, 4:15 PM EDT	Special Weather Statement	PHI	Delaware	60 min
Aug 3, 2:58 PM EDT	Special Weather Statement	PHI	Sussex	62 min
Aug 3, 3:57 PM EDT	Special Weather Statement	PHI	New Castle	63 min
Aug 3, 4:14 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	3 hr
Aug 3, 4:58 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	40 min
Aug 3, 5:24 PM EDT	Special Weather Statement	PHI	Cecil	66 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.