Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

June 14, 2011Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 14, 2011, 4:49 PM EDT for Bucks County, Pennsylvania. It was in force for 86 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: Jun 14, 2011, 4:49 PM EDT (20:49 UTC)
Expired: Jun 14, 2011, 6:15 PM EDT
In force: 86 min
Issued by: NWS Philadelphia/Mount Holly

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 90 km from the middle of the area, began a volume at 20:50 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, 8.8 hours before the alert went out and 128 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1010 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 18 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.

978 
WWUS81 KPHI 142049
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
449 PM EDT TUE JUN 14 2011

PAZ061-062-068-069-142215-
BUCKS PA-LEHIGH PA-MONTGOMERY PA-NORTHAMPTON PA-
449 PM EDT TUE JUN 14 2011

...A STRONG THUNDERSTORM WILL AFFECT BUCKS...LEHIGH...MONTGOMERY AND
NORTHAMPTON COUNTIES...

AT 446 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 7 MILES SOUTHEAST OF ALLENTOWN...MOVING SOUTH AT
10 MPH. THE THUNDERSTORM WILL BE NEAR COOPERSBURG...PLEASANT VALLEY
AROUND 500 PM...RICHLANDTOWN...QUAKERTOWN AROUND 530 PM...
TRUMBAUERSVILLE AROUND 545 PM...BEDMINSTER AROUND 600 PM...PERKASIE
AND SELLERSVILLE AROUND 615 PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO 
POND ON ROADS AND POOR DRAINAGE AREAS. PLEASE TAKE ROADWAYS THAT ARE 
NOT PRONE TO POOR DRAINAGE FLOODING.  WIND GUSTS TO 30 MPH ARE 
POSSIBLE WITH THIS STORM.

THIS STORM WILL LIKELY PRODUCE SMALL HAIL.

IF YOU SEE THREATENING WEATHER, MOVE INDOORS QUICKLY.

LAT...LON 4035 7511 4025 7540 4058 7542 4062 7530

$$
 
TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 4:17 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more	20 hr
Jun 14, 3:32 PM EDT	Special Weather Statement	PHI	Mercer	88 min
Jun 14, 3:36 PM EDT	Special Weather Statement	PHI	Morris, Sussex	84 min
Jun 14, 3:47 PM EDT	Special Weather Statement	PHI	Burlington	88 min
Jun 14, 3:51 PM EDT	Special Weather Statement	PHI	Middlesex, Somerset	84 min
Jun 14, 4:45 PM EDT	Special Weather Statement	PHI	Burlington	90 min
Jun 14, 5:10 PM EDT	Special Weather Statement	PHI	Cape May	95 min
Jun 14, 5:25 PM EDT	Areal Flood Advisory	PHI	Burlington	87 min
Jun 14, 3:44 PM EDT	Special Weather Statement	PHI	Northampton	91 min
Jun 14, 4:57 PM EDT	Special Weather Statement	PHI	Philadelphia	93 min
Jun 14, 5:28 PM EDT	Areal Flood Advisory	PHI	Bucks	85 min
Jun 14, 5:46 PM EDT	Special Weather Statement	PHI	Montgomery, Philadelphia	59 min
Jun 14, 6:05 PM EDT	Special Weather Statement	PHI	Delaware	55 min
Jun 14, 6:15 PM EDT	Areal Flood Advisory	PHI	Montgomery	2 hr

Nearby

Special Weather Statements in Pennsylvania, 2011 Every 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.