Alert archive / Pennsylvania / Areal Flood Advisories in 2017

Areal Flood Advisory 14, NWS Philadelphia/Mount Holly

April 6, 2017Hunterdon County, Sussex County, Warren County, New Jersey; 4 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Apr 6, 2017, 4:26 PM EDT for Hunterdon County, Sussex County, Warren County, New Jersey; 4 counties in Pennsylvania. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Apr 6, 2017, 4:26 PM EDT (20:26 UTC)
Expired: Apr 6, 2017, 8:30 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Hunterdon County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 109 km from the middle of the area, began a volume at 20:28 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

Brookhaven, NY (KOKX), launched 12:00Z, 8.4 hours before the alert went out and 191 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: 8 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 428 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 407 m²/s²
0-3 km storm-relative helicity: 569 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Apr 6, 4:08 PM EDT, 18 minutes earlier.

Area forecast discussion, Apr 6, 4:08 PM EDT, 18 minutes before

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Hazardous weather outlook, Apr 6, 3:52 PM EDT, 34 minutes before

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
352 PM EDT Thu Apr 6 2017

PAZ060-061-072000-
Berks-Lehigh-
352 PM EDT Thu Apr 6 2017

...FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for east central Pennsylvania.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

NJZ001-007>010-012-013-015-PAZ054-055-062-072000-
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Western Monmouth-
Mercer-Carbon-Monroe-Northampton-
352 PM EDT Thu Apr 6 2017

...FLOOD WATCH IN EFFECT UNTIL 1 AM EDT FRIDAY...

This Hazardous Weather Outlook is for central New Jersey, northern
New Jersey, northwest New Jersey, east central Pennsylvania and
northeast Pennsylvania.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

DEZ002>004-MDZ012-015-019-020-NJZ021>025-027-072000-
Kent-Inland Sussex-Delaware Beaches-Kent MD-Queen Annes-Talbot-
Caroline-Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May-
Coastal Atlantic-Southeastern Burlington-
352 PM EDT Thu Apr 6 2017

...SEVERE THUNDERSTORM WATCH 133 IN EFFECT UNTIL 5 PM EDT THIS
AFTERNOON...

This Hazardous Weather Outlook is for central Delaware, southern
Delaware, northeast Maryland and southern New Jersey.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

DEZ001-MDZ008-NJZ016>019-PAZ070-071-101>106-072000-
New Castle-Cecil-Salem-Gloucester-Camden-Northwestern Burlington-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
352 PM EDT Thu Apr 6 2017

...FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...SEVERE THUNDERSTORM WATCH 133 IN EFFECT UNTIL 5 PM EDT THIS
AFTERNOON...

This Hazardous Weather Outlook is for northern Delaware, northeast
Maryland, southern New Jersey and southeast Pennsylvania.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.
   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

NJZ014-020-026-072000-
Eastern Monmouth-Ocean-Coastal Ocean-
352 PM EDT Thu Apr 6 2017

This Hazardous Weather Outlook is for central New Jersey and
southern New Jersey.

.DAY ONE...This Afternoon and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
 conditions according to Standard Operating Procedures.

ANZ450>455-072000-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
352 PM EDT Thu Apr 6 2017

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...This Afternoon and Tonight.

Thunderstorms with gusty winds and lightning into the evening.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
 conditions according to Standard Operating Procedures.

ANZ430-431-072000-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
352 PM EDT Thu Apr 6 2017

...SEVERE THUNDERSTORM WATCH 133 IN EFFECT UNTIL 5 PM EDT THIS
AFTERNOON...

This Hazardous Weather Outlook is for Delaware Bay Waters.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
 conditions according to Standard Operating Procedures.

In the hours before

Local storm report, Apr 6, 3:02 PM EDT, 1 hour 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
302 PM EDT THU APR 06 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0134 PM     HAIL             WASHINGTON TWP          39.75N  75.07W
04/06/2017  M0.25 INCH       GLOUCESTER         NJ   TRAINED SPOTTER

0227 PM     MARINE TSTM WIND DEWEY BEACH             38.70N  75.08W
04/06/2017  M41 MPH          SUSSEX             DE   WEATHERFLOW

0235 PM     MARINE TSTM WIND CAPE MAY                38.94N  74.90W
04/06/2017  M41 MPH          CAPE MAY           NJ   WEATHERFLOW

0244 PM     MARINE TSTM WIND OCEAN CITY              39.27N  74.60W
04/06/2017  M40 MPH          CAPE MAY           NJ   WEATHERFLOW

&&

EVENT NUMBER PHI1700589
EVENT NUMBER PHI1700590
EVENT NUMBER PHI1700591
EVENT NUMBER PHI1700592

MEOLA

Local storm report, Apr 6, 3:36 PM EDT, 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
336 PM EDT THU APR 06 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     MARINE TSTM WIND CAPE MAY NOS BUOY       38.97N  74.96W
04/06/2017  M46 MPH          ANZ431             NJ   NOS PLATFORM

0238 PM     HAIL             MOUNT LAUREL            39.93N  74.89W
04/06/2017  M0.25 INCH       BURLINGTON         NJ   SOCIAL MEDIA

0248 PM     MARINE TSTM WIND TUCKERTON               39.60N  74.33W
04/06/2017  M39 MPH          OCEAN              NJ   WEATHERFLOW

0302 PM     MARINE TSTM WIND DEWEY BEACH             38.70N  75.08W
04/06/2017  M44 MPH          SUSSEX             DE   WEATHERFLOW

0305 PM     MARINE TSTM WIND KITE ISLAND             39.79N  74.17W
04/06/2017  M40 MPH          ANZ451             NJ   WEATHERFLOW

0313 PM     MARINE TSTM WIND 1 ESE CEDAR BEACH       39.87N  74.14W
04/06/2017  M41 MPH          ANZ451             NJ   WEATHERFLOW

0314 PM     MARINE TSTM WIND OCEAN CITY              39.27N  74.60W
04/06/2017  M49 MPH          CAPE MAY           NJ   WEATHERFLOW

0316 PM     MARINE TSTM WIND 1 SW WEST ATLANTIC CITY 39.37N  74.50W
04/06/2017  M46 MPH          ANZ452             NJ   WEATHERFLOW

0323 PM     MARINE TSTM WIND 1 WSW SHIP BOTTOM       39.64N  74.21W
04/06/2017  M47 MPH          ANZ451             NJ   WEATHERFLOW

&&

EVENT NUMBER PHI1700593
EVENT NUMBER PHI1700594
EVENT NUMBER PHI1700595
EVENT NUMBER PHI1700596
EVENT NUMBER PHI1700597
EVENT NUMBER PHI1700598
EVENT NUMBER PHI1700599
EVENT NUMBER PHI1700600
EVENT NUMBER PHI1700601

MEOLA

Special weather statement, Apr 6, 3:36 PM EDT, 50 minutes before

Special Weather Statement
National Weather Service Mount Holly NJ
336 PM EDT THU APR 6 2017

NJZ013>015-019>027-062000-
Coastal Atlantic-Northwestern Burlington-Eastern
Monmouth-Cumberland-Coastal Ocean-Ocean-Western
Monmouth-Atlantic-Atlantic Coastal Cape May-Cape May-Southeastern
Burlington-Mercer-
336 PM EDT THU APR 6 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT ATLANTIC...EAST CENTRAL
CUMBERLAND...OCEAN...SOUTHEASTERN MERCER...NORTH CENTRAL CAPE MAY...
EASTERN BURLINGTON AND MONMOUTH COUNTIES...

At 335 PM EDT, radar indicated strong thunderstorms were located
along a line extending from Hopewell to Allentown to near Old Halfway
to near Mays Landing. Movement was northeast at 70 mph.

Wind gusts up to 50 mph and half inch hail are possible with these
storms.

Locations impacted include...
Toms River, Atlantic City, Ocean City, Lakewood, Jackson, Howell,
Manalapan, Barnegat, Pleasantville, Tinton Falls, Hammonton, Red
Bank, Beachwood, Somers Point, Ventnor City, Brigantine, Northfield,
Absecon, Margate City and Egg Harbor City.

Frequent cloud to ground lightning is occurring with these storms.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3974 7419 3976 7410 3975 7410 3958 7434
      3950 7429 3954 7440 3956 7441 3941 7440
      3942 7439 3949 7431 3947 7430 3942 7434
      3930 7456 3929 7495 3983 7460 4015 7472
      4040 7399
TIME...MOT...LOC 1935Z 207DEG 62KT 4041 7476 4016 7459 3987 7449 3944
7476

33

Special weather statement, Apr 6, 3:56 PM EDT, 30 minutes before

Special Weather Statement
National Weather Service Mount Holly NJ
356 PM EDT THU APR 6 2017

NJZ012>014-020-022-024>027-062045-
Coastal Atlantic-Eastern Monmouth-Coastal Ocean-Ocean-Western
Monmouth-Atlantic-Middlesex-Atlantic Coastal Cape May-Southeastern
Burlington-
356 PM EDT THU APR 6 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN
ATLANTIC...OCEAN...NORTHEASTERN CAPE MAY...SOUTHEASTERN BURLINGTON...
MONMOUTH AND EASTERN MIDDLESEX COUNTIES...

At 355 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Sayreville to Pleasantville.
Movement was northeast at 60 mph.

Wind gusts up to 50 mph are possible with these storms.

Locations impacted include...
Toms River, New Brunswick, Perth Amboy, Atlantic City, Long Branch,
Asbury Park, Edison, Lakewood, Middletown, Old Bridge, Jackson,
Howell, East Brunswick, Sayreville, Marlboro, Manalapan, Barnegat,
Pleasantville, Tinton Falls and Holmdel.

Frequent cloud to ground lightning is occurring with these storms.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3979 7410 3999 7414 3977 7410 3980 7417
      3975 7410 3958 7434 3950 7429 3954 7439
      3942 7434 3928 7455 4057 7440 4057 7421
      4055 7425 4046 7426 4044 7398
TIME...MOT...LOC 1955Z 277DEG 62KT 4049 7431 3939 7449

33

Local storm report, Apr 6, 4:21 PM EDT, 5 minutes before

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Local storm report, Apr 6, 4:26 PM EDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
426 PM EDT THU APR 06 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     MARINE TSTM WIND SHIP JOHN SHOAL NOS     39.30N  75.38W
04/06/2017  M54 MPH          ANZ430             NJ   NOS PLATFORM

&&

EVENT NUMBER PHI1700608

MEOLA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 12:29 PM EDT	Special Marine Warning	PHI		61 min
Apr 6, 1:00 PM EDT	Special Weather Statement	PHI	Salem	60 min
Apr 6, 1:21 PM EDT	Special Marine Warning	PHI		54 min
Apr 6, 1:33 PM EDT	Special Marine Warning	PHI		57 min
Apr 6, 1:53 PM EDT	Special Marine Warning	PHI		22 min
Apr 6, 2:07 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 6 more	53 min
Apr 6, 2:15 PM EDT	Special Marine Warning	PHI		45 min
Apr 6, 2:24 PM EDT	Special Marine Warning	PHI		36 min
Apr 6, 2:29 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Salem	4 hr
Apr 6, 2:56 PM EDT	Special Weather Statement	PHI	Camden, Cumberland, Gloucester, Salem	64 min
Apr 6, 3:02 PM EDT	Special Marine Warning	PHI		58 min
Apr 6, 3:09 PM EDT	Special Marine Warning	PHI		51 min
Apr 6, 3:36 PM EDT	Special Weather Statement	PHI	Atlantic, Monmouth, Ocean	24 min
Apr 6, 3:56 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth, Ocean	49 min
Apr 6, 3:57 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth, Morris, Ocean	4 hr
Apr 6, 3:59 PM EDT	Special Marine Warning	PHI		61 min
Apr 6, 7:41 PM EDT	Areal Flood Warning	PHI	Hunterdon, Somerset	3 hr
Apr 6, 11:58 AM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Chester, Lehigh, Monroe, Montgomery and 1 more	4 hr
Apr 6, 4:02 PM EDT	Areal Flood Advisory	PHI	Berks, Carbon, Chester, Lehigh, Monroe, Montgomery and 1 more	6 hr
Apr 6, 11:59 AM EDT	Special Weather Statement	PHI	Caroline	31 min
Apr 6, 12:17 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's, Talbot	24 min
Apr 6, 1:08 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	40 min
Apr 6, 2:13 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's, Talbot	47 min
Apr 6, 4:41 PM EDT	Special Weather Statement	PHI	Talbot	34 min

Nearby

Areal Flood Advisories in Pennsylvania, 2017 Areal Flood Advisories in New Jersey, 2017 Every areal flood advisory in 2017

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.