Alert archive / Pennsylvania / Special Weather Statements in 2013

Special Weather Statement, NWS Philadelphia/Mount Holly

September 12, 20135 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Sep 12, 2013, 4:21 PM EDT for 5 counties in Pennsylvania. It was in force for 84 min. 10 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 12, 2013, 4:21 PM EDT (20:21 UTC)
Expired: Sep 12, 2013, 5:45 PM EDT
In force: 84 min
Issued by: NWS Philadelphia/Mount Holly

Counties Berks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 20:24 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.

What was reported inside it

Time	Report	Where	Remark
Sep 12, 4:40 PM EDT	TSTM WND DMG	Tulpehocken Twp, PA	ONE TREE DOWN
Sep 12, 4:45 PM EDT	TSTM WND DMG	Oley Twp, PA	FEW TREES DOWN
Sep 12, 5:11 PM EDT	TSTM WND GST 46	Reading, PA	READING ASOS WIND
Sep 12, 5:11 PM EDT	TSTM WND GST 46	Reading Airport, PA	A 46 MPH THUNDERSTORM WIND GUST AT THE READING AIRPORT.
Sep 12, 5:11 PM EDT	TSTM WND GST 46	Reading Airport, PA	READING ASOS WIND
Sep 12, 5:20 PM EDT	TSTM WND DMG	Muhlenberg Twp, PA	* 1 INJ * TREE FELL ON HOUSE AND PERSON TRAPPED IN DEBRIS. TIME OF EVENT IS APPROXIMATE
Sep 12, 5:20 PM EDT	TSTM WND DMG	Muhlenberg Twp, PA	TREE FELL ON HOUSE AND PERSON TRAPPED IN DEBRIS. TIME OF EVENT IS APPROXIMATE
Sep 12, 5:25 PM EDT	TSTM WND DMG	Whitehall Twp, PA	TREES DOWN IN WHITEHALL AND SOME POWER LINES ARE LOWER BUT NOT QUITE ON GROUND.
Sep 12, 5:30 PM EDT	TSTM WND DMG	Rockland Twp, PA	NUMEROUS TREES DOWN ACROSS SEVERAL LOCATIONS...LINES DOWN IN ROCKLAND.
Sep 12, 5:49 PM EDT	TSTM WND GST 61	Bushkill Twp, PA	A 61 MPH THUNDERSTORM WIND GUST WAS MEASURED IN BUSHKILL TOWNSHIP. WINDS TOOK DOWN A LARGE PINE TREE IN A BACKYARD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.4 hours before the alert went out and 157 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: 1009 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 970 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 39 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.

164 
WWUS81 KPHI 122021
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
421 PM EDT THU SEP 12 2013

PAZ054-055-060>062-122145-
BERKS PA-CARBON PA-LEHIGH PA-MONROE PA-NORTHAMPTON PA-
421 PM EDT THU SEP 12 2013

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT BERKS...CARBON...
LEHIGH...MONROE AND NORTHAMPTON COUNTIES...

AT 420 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM
SHUMANS TO MINERSVILLE TO LAWN...MOVING EAST AT 40 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS. 

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. DO
NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. 

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND FILL POOR DRAINAGE AREAS. THE RAIN CAN CAUSE RAPID
RISES ON SMALL STREAMS AND CREEKS. 

THESE STORMS WILL BE NEAR STRAUSSTOWN AROUND 440 PM...TRESCKOW...
LANSFORD...BEAVER MEADOWS...AND WOMELSDORF AROUND 450 PM...FAIRVIEW
HGTS...FAIRVIEW HGTS...WEATHERLY...AND SUMMIT HILL AROUND 500 PM AND
WYOMISSING HILLS AROUND 510 PM.

LAT...LON 4058 7603 4065 7599 4074 7577 4092 7600
      4100 7575 4111 7575 4113 7564 4122 7555
      4126 7513 4116 7515 4114 7508 4109 7502
      4104 7503 4098 7514 4087 7505 4043 7547
      4044 7553 4028 7566 4014 7589 4050 7644

$$

MEOLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 12, 6:43 AM EDT	Special Weather Statement	PHI	Hunterdon	62 min
Sep 12, 7:38 AM EDT	Areal Flood Advisory	PHI	Hunterdon	3 hr
Sep 12, 8:16 AM EDT	Flash Flood Warning	PHI	Hunterdon	3 hr
Sep 12, 11:15 AM EDT	Special Weather Statement	PHI	Hunterdon, Morris, Somerset	60 min
Sep 12, 11:35 AM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset	55 min
Sep 12, 1:19 PM EDT	Special Weather Statement	PHI	Monmouth	56 min
Sep 12, 3:13 PM EDT	Special Weather Statement	PHI	Monmouth	62 min
Sep 12, 5:38 PM EDT	Small Craft Advisory	PHI		7 hr
Sep 12, 6:00 PM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	90 min
Sep 12, 6:07 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Sussex, Warren	68 min
Sep 12, 6:35 PM EDT	Special Weather Statement	PHI	Middlesex	55 min
Sep 12, 6:43 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Somerset	62 min
Sep 12, 7:28 PM EDT	Special Weather Statement	PHI	Burlington, Middlesex, Monmouth	62 min
Sep 12, 2:26 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	64 min
Sep 12, 3:43 PM EDT	Special Weather Statement	PHI	Berks	62 min
Sep 12, 4:40 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Carbon, Lehigh, Monroe, Montgomery and 1 more	95 min
Sep 12, 5:47 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	58 min
Sep 12, 6:40 PM EDT	Special Weather Statement	PHI	Kent	65 min
Sep 12, 7:26 PM EDT	Special Weather Statement	PHI	Sussex	64 min
Sep 12, 2:21 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	54 min
Sep 12, 5:58 PM EDT	Special Weather Statement	PHI	Queen Anne's, Talbot	62 min
Sep 12, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	Talbot	39 min

Nearby

Special Weather Statements in Pennsylvania, 2013 Every special weather statement in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.