Alert archive / Pennsylvania / Areal Flood Advisories in 2013

Areal Flood Advisory 142, NWS Philadelphia/Mount Holly

July 22, 2013Berks County, Lehigh County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 22, 2013, 9:53 PM EDT for Berks County, Lehigh County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jul 22, 2013, 9:53 PM EDT (01:53 UTC)
Expired: Jul 23, 2013, 12:45 AM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Berks County, PA, Lehigh County, PA

The radar

The Philadelphia radar (KDIX), 131 km from the middle of the area, began a volume at 01:53 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.9 hours before the alert went out and 223 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: 1248 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1188 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Jul 22, 9:08 PM EDT, 45 minutes earlier.

Area forecast discussion, Jul 22, 9:08 PM EDT, 45 minutes before

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Hazardous weather outlook, Jul 22, 9:42 PM EDT, 11 minutes before

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In the hours before

Special weather statement, Jul 22, 4:30 PM EDT, 5 hours 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
430 PM EDT MON JUL 22 2013

NJZ013-020-222130-
OCEAN NJ-WESTERN MONMOUTH NJ-
430 PM EDT MON JUL 22 2013

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN OCEAN AND
SOUTHWESTERN MONMOUTH COUNTIES...

AT 425 PM EDT...A STRONG THUNDERSTORM WAS NEAR SIX FLAGS THEME
PARK...MOVING SOUTHEAST AT 10 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM. FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. 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 THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND FILL POOR
DRAINAGE AREAS. THE RAIN CAN CAUSE RAPID RISES ON SMALL STREAMS AND
CREEKS. THIS STORM WILL BE NEAR CASSVILLE AROUND 440 PM...JACKSONS
MILLS AROUND 450 PM...FREEWOOD ACRES AROUND 510 PM...JACKSON AROUND
520 PM AND LEISURE KNOLL AROUND 530 PM.

LAT...LON 4012 7413 3992 7436 4012 7457 4026 7441

MEOLA

Special weather statement, Jul 22, 5:10 PM EDT, 4 hours 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
510 PM EDT MON JUL 22 2013

NJZ015-PAZ106-222215-
LOWER BUCKS PA-MERCER NJ-
510 PM EDT MON JUL 22 2013

...A STRONG THUNDERSTORM WILL AFFECT MERCER AND SOUTHEASTERN BUCKS
COUNTIES...

AT 508 PM EDT...A STRONG THUNDERSTORM WAS NEAR FAIRLESS HILLS...
MOVING NORTHEAST AT 20 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM. FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. 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 THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND FILL POOR
DRAINAGE AREAS. THE RAIN CAN CAUSE RAPID RISES ON SMALL STREAMS AND
CREEKS. THIS STORM WILL BE NEAR MORRISVILLE AROUND 520 PM...TRENTON
AROUND 530 PM...LAWRENCEVILLE AROUND 540 PM...EDINBURG AROUND 550
PM...PRINCETON JUNCTION AROUND 600 PM AND HIGHTSTOWN AROUND 610 PM.

LAT...LON 4016 7467 4018 7471 4014 7472 4012 7479
      4013 7482 4009 7485 4008 7490 4023 7503
      4039 7465 4038 7462 4033 7462 4029 7456
      4029 7453 4025 7448

MEOLA

Special weather statement, Jul 22, 6:32 PM EDT, 3 hours 21 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
632 PM EDT MON JUL 22 2013

DEZ001-NJZ016-222330-
NEW CASTLE DE-SALEM NJ-
632 PM EDT MON JUL 22 2013

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN NEW CASTLE AND
NORTHWESTERN SALEM COUNTIES...

AT 631 PM EDT...A STRONG THUNDERSTORM WAS NEAR BEAR...MOVING NORTH AT
20 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM. FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. 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 THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND FILL POOR
DRAINAGE AREAS. THE RAIN CAN CAUSE RAPID RISES ON SMALL STREAMS AND
CREEKS. THIS STORM WILL BE NEAR BROOKSIDE AROUND 640 PM...WILMINGTON
MANOR AROUND 650 PM...NEWPORT AROUND 700 PM...WILMINGTON AROUND 710
PM AND TALLEYVILLE AROUND 720 PM.

LAT...LON 3980 7571 3984 7562 3984 7551 3980 7541
      3979 7542 3978 7540 3973 7538 3948 7554
      3955 7554 3957 7552 3959 7555 3951 7555
      3949 7558 3955 7578 3962 7579

MEOLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 9:48 PM EDT	Areal Flood Advisory	PHI	Morris	4 hr
Jul 23, 1:50 AM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer	4 hr
Jul 23, 2:11 AM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer	4 hr
Jul 23, 2:38 AM EDT	Special Weather Statement	PHI	Mercer, Middlesex	97 min
Jul 23, 3:49 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 7 more	11 hr
Jul 23, 4:02 AM EDT	Areal Flood Advisory	PHI	Burlington, Monmouth, Ocean	4 hr
Jul 23, 9:24 AM EDT	Areal Flood Warning	PHI	Burlington	6 hr
Jul 23, 10:32 AM EDT	Special Weather Statement	PHI	Atlantic	58 min
Jul 23, 11:22 AM EDT	Special Weather Statement	PHI	Atlantic, Cumberland	53 min
Jul 23, 11:56 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cumberland, Ocean	4 hr
Jul 23, 12:03 PM EDT	Special Weather Statement	PHI	Atlantic	57 min
Jul 23, 12:54 PM EDT	Special Weather Statement	PHI	Atlantic	66 min
Jul 23, 3:08 PM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more	9 hr
Jul 23, 4:10 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 6 more	2 hr
Jul 22, 9:19 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	3 hr
Jul 22, 11:09 PM EDT	Areal Flood Advisory	PHI	Berks, Chester	3 hr
Jul 22, 11:39 PM EDT	Flash Flood Warning	PHI	Berks, Lehigh	4 hr
Jul 23, 12:11 AM EDT	Special Weather Statement	PHI	Chester	94 min
Jul 23, 12:25 AM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 23, 2:22 AM EDT	Special Weather Statement	PHI	Kent, Sussex	2 hr

Nearby

Areal Flood Advisories in Pennsylvania, 2013 Every areal flood advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.