Alert archive / Pennsylvania / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

April 5, 20114 states

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 5, 2011, 8:55 AM EDT for 4 states. It was in force for 65 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: Apr 5, 2011, 8:55 AM EDT (12:55 UTC)
Expired: Apr 5, 2011, 10:00 AM EDT
In force: 65 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Hunterdon County, NJ, Morris County, NJ, Warren County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA

The radar

The Dover AFB radar (KDOX), 70 km from the middle of the area, began a volume at 12:57 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, 0.9 hours before the alert went out and 23 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: 1186 m above ground
0-6 km bulk shear: 79 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 133 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.

913 
WWUS81 KPHI 051255
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
855 AM EDT TUE APR 5 2011

DEZ001>003-MDZ008-012-015-019-020-NJZ001-007>010-016-PAZ054-055-
060>062-067>071-051400-
BERKS PA-BUCKS PA-CARBON PA-CAROLINE MD-CECIL MD-CHESTER PA-
DELAWARE PA-HUNTERDON NJ-INLAND SUSSEX DE-KENT MD-KENT DE-LEHIGH PA-
MONROE PA-MONTGOMERY PA-MORRIS NJ-NEW CASTLE DE-NORTHAMPTON PA-
PHILADELPHIA PA-QUEEN ANNE'S MD-SALEM NJ-SOMERSET NJ-SUSSEX NJ-
TALBOT MD-WARREN NJ-
855 AM EDT TUE APR 5 2011

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT KENT...CAROLINE...
CECIL...SUSSEX...WARREN...MORRIS...HUNTERDON...SOMERSET...SALEM...
DELAWARE...PHILADELPHIA...CHESTER...MONTGOMERY...BERKS...LEHIGH...
NORTHAMPTON...CARBON...BUCKS...MONROE...QUEEN ANNE'S...TALBOT AND NEW
CASTLE COUNTIES...

AT 851 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH STRONG WIND GUSTS ALONG A LINE EXTENDING FROM 9 MILES
SOUTHEAST OF MOUNT POCONO TO 20 MILES SOUTH OF LANCASTER TO 25 MILES
SOUTHWEST OF EASTON...MOVING EAST AT 40 MPH. THE SHOWERS WILL BE NEAR
TALBOT...WIND GAP...STROUDSBURG...PEN ARGYL AROUND 900 AM...ECHO
LAKE...NEW MORGAN...OVERTON...COPPERVILLE AROUND 905 AM...ZIONSVILLE
AND COLUMBIA AROUND 910 AM.

WIND GUSTS OF 40 TO 50 MPH ARE POSSIBLE WITH THESE SHOWERS.

LAT...LON 3846 7570 3869 7583 3856 7604 3871 7632
      3884 7625 3882 7621 3883 7620 3885 7638
      3900 7618 3918 7628 3951 7599 3970 7624
      4014 7590 4026 7606 4109 7527 4101 7433
      3977 7551 3846 7541

$$

FORECASTER: DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 5:01 AM EDT	Severe Thunderstorm Warning	PHI	Salem	74 min
Apr 5, 5:58 AM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	62 min
Apr 5, 6:05 AM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Gloucester, Monmouth, Ocean and 1 more	55 min
Apr 5, 6:30 AM EDT	Special Weather Statement	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 1 more	60 min
Apr 5, 6:42 AM EDT	Special Weather Statement	PHI	Cape May, Cumberland	63 min
Apr 5, 7:05 AM EDT	Special Weather Statement	PHI	Morris	55 min
Apr 5, 7:07 AM EDT	Special Weather Statement	PHI	Burlington, Middlesex, Monmouth, Ocean	53 min
Apr 5, 9:37 AM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Salem, Somerset, Sussex, Warren	53 min
Apr 5, 10:16 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	44 min
Apr 5, 10:20 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland	40 min
Apr 5, 10:30 AM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Monmouth, Morris, Somerset	60 min
Apr 5, 10:35 AM EDT	Special Marine Warning	PHI		55 min
Apr 5, 10:41 AM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Salem	19 min
Apr 5, 10:58 AM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Middlesex and 2 more	92 min
Apr 5, 11:00 AM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	30 min
Apr 5, 11:09 AM EDT	Special Marine Warning	PHI		96 min
Apr 5, 11:45 AM EDT	Special Marine Warning	PHI		60 min
Apr 5, 2:57 PM EDT	Small Craft Advisory	PHI		27 hr
Apr 5, 4:03 AM EDT	Special Weather Statement	PHI	Berks	57 min
Apr 5, 5:23 AM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 1 more	67 min
Apr 5, 5:28 AM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	62 min
Apr 5, 3:05 PM EDT	Frost Advisory	PHI	Caroline, Queen Anne's, Talbot	13 hr

Nearby

Special Weather Statements in Pennsylvania, 2011 Special Weather Statements in Maryland, 2011 Special Weather Statements in New Jersey, 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.