Alert archive / Pennsylvania / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 1, 2012Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 1, 2012, 3:35 PM EDT for Philadelphia County, Pennsylvania. It was in force for 55 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 1, 2012, 3:35 PM EDT (19:35 UTC)
Expired: Aug 1, 2012, 4:30 PM EDT
In force: 55 min
Issued by: NWS Philadelphia/Mount Holly

County Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 60 km from the middle of the area, began a volume at 19:35 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, 7.6 hours before the alert went out and 107 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: 897 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 643 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: -2 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.

994 
WWUS81 KPHI 011935
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
335 PM EDT WED AUG 1 2012

PAZ068-069-071-012030-
BUCKS PA-MONTGOMERY PA-PHILADELPHIA PA-
335 PM EDT WED AUG 1 2012

...A STRONG THUNDERSTORM WILL AFFECT BUCKS...MONTGOMERY AND
PHILADELPHIA COUNTIES...

AT 331 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 8 MILES NORTHWEST OF PHILADELPHIA...MOVING
NORTHEAST AT 10 MPH. THE THUNDERSTORM WILL BE NEAR ORELAND...GLENSIDE
AROUND 345 PM...FORT WASHINGTON...AMBLER AROUND 400 PM...MAPLE
GLEN...WILLOW GROVE AROUND 415 PM...HORSHAM AND HATBORO AROUND 430
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.

LAT...LON 4002 7501 4001 7504 3997 7508 3996 7512
      4009 7542 4028 7526 4010 7489

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 9:51 PM EDT	Coastal Flood Statement	PHI	Burlington, Camden, Gloucester	5 hr
Aug 1, 9:24 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more	15 hr
Aug 1, 9:44 AM EDT	Areal Flood Advisory	PHI	Cumberland	2 hr
Aug 1, 10:48 AM EDT	Special Weather Statement	PHI	Cumberland	57 min
Aug 1, 10:59 AM EDT	Areal Flood Advisory	PHI	Cumberland	73 min
Aug 1, 12:09 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	3 hr
Aug 1, 12:48 PM EDT	Areal Flood Advisory	PHI	Cape May	107 min
Aug 1, 1:09 PM EDT	Special Weather Statement	PHI	Cape May	66 min
Aug 1, 1:16 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Ocean	3 hr
Aug 1, 1:45 PM EDT	Special Weather Statement	PHI	Somerset	60 min
Aug 1, 2:12 PM EDT	Areal Flood Advisory	PHI	Middlesex, Morris, Somerset	3 hr
Aug 1, 2:27 PM EDT	Special Weather Statement	PHI	Hunterdon, Mercer	63 min
Aug 1, 2:39 PM EDT	Flash Flood Warning	PHI	Middlesex, Somerset	3 hr
Aug 1, 2:47 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer	3 hr
Aug 1, 2:57 PM EDT	Special Weather Statement	PHI	Ocean	63 min
Aug 1, 3:12 PM EDT	Special Weather Statement	PHI	Hunterdon	63 min
Aug 1, 3:25 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	3 hr
Aug 1, 3:31 PM EDT	Coastal Flood Statement	PHI	Burlington, Camden, Gloucester, Salem	11 hr
Aug 1, 3:51 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris	2 hr
Aug 1, 4:11 PM EDT	Areal Flood Advisory	PHI	Burlington, Ocean	65 min
Aug 1, 4:41 PM EDT	Special Weather Statement	PHI	Sussex	64 min
Aug 1, 5:26 PM EDT	Areal Flood Advisory	PHI	Sussex	102 min
Aug 1, 5:41 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	64 min
Aug 1, 5:46 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	31 min
Aug 1, 6:16 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	46 min
Jul 31, 8:11 PM EDT	Special Weather Statement	PHI	Berks	64 min
Jul 31, 9:12 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	63 min
Aug 1, 1:02 AM EDT	Special Weather Statement	PHI	Chester	58 min
Aug 1, 2:03 PM EDT	Special Weather Statement	PHI	Chester	57 min
Aug 1, 3:03 PM EDT	Special Weather Statement	PHI	Monroe	57 min
Aug 1, 4:07 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery	3 hr
Aug 1, 4:16 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	59 min
Aug 1, 4:51 PM EDT	Areal Flood Advisory	PHI	Monroe	36 min
Aug 1, 4:53 PM EDT	Special Weather Statement	PHI	Philadelphia	67 min
Aug 1, 5:06 PM EDT	Areal Flood Advisory	PHI	Montgomery, Philadelphia	12 min
Aug 1, 5:09 PM EDT	Flash Flood Warning	PHI	Montgomery, Philadelphia	3 hr
Aug 1, 5:22 PM EDT	Flash Flood Warning	PHI	Monroe	106 min
Aug 1, 5:34 PM EDT	Special Weather Statement	PHI	Carbon	56 min
Aug 1, 5:43 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery	62 min
Aug 1, 5:50 PM EDT	Special Weather Statement	PHI	Montgomery	55 min
Aug 1, 5:53 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	100 min
Aug 1, 5:55 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe, Northampton	65 min
Aug 1, 6:08 PM EDT	Flash Flood Warning	PHI	Chester, Montgomery	2 hr
Aug 1, 6:22 PM EDT	Special Weather Statement	PHI	Lehigh	53 min
Aug 1, 6:30 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	64 min
Aug 1, 6:53 PM EDT	Areal Flood Advisory	PHI	Lehigh, Northampton	69 min
Aug 1, 6:59 PM EDT	Special Weather Statement	PHI	Northampton	61 min
Aug 1, 7:32 PM EDT	Special Weather Statement	PHI	Chester	58 min
Aug 1, 7:49 PM EDT	Areal Flood Advisory	PHI	Chester	52 min
Aug 1, 1:18 PM EDT	Special Weather Statement	PHI	Sussex	57 min
Aug 1, 1:43 PM EDT	Areal Flood Advisory	PHI	Kent, New Castle	86 min
Aug 1, 1:55 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	2 hr
Aug 1, 12:13 AM EDT	Special Weather Statement	PHI	Cecil, Kent, Queen Anne's	47 min
Aug 1, 1:11 AM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	64 min
Aug 1, 1:17 PM EDT	Special Weather Statement	PHI	Queen Anne's	58 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.