Alert archive / New Jersey / Flash Flood Warnings in 2017

Flash Flood Warning 35, NWS Philadelphia/Mount Holly

July 29, 2017Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 29, 2017, 5:13 AM EDT for Cape May County, New Jersey. It was in force for 3 hr. 15 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: Jul 29, 2017, 5:13 AM EDT (09:13 UTC)
Expired: Jul 29, 2017, 8:15 AM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Cape May County, NJ

The radar

The Dover AFB radar (KDOX), 52 km from the middle of the area, began a volume at 09:13 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
Jul 29, 5:22 AM EDT	FLOOD	Middle Twp, NJ	NJ 47 AT FIFTH STREET FLOODED.
Jul 29, 5:22 AM EDT	FLOOD	North Wildwood, NJ	NJ 147 IN BOTH DIRECTIONS AT WEST ANGLESEA DRIVE CLOSED.
Jul 29, 5:22 AM EDT	FLOOD	Wildwood, NJ	NJ 47 IN BOTH DIRECTIONS AT CR 624 AND WEST ROAD CLOSED.
Jul 29, 5:29 AM EDT	FLOOD	Wildwood, NJ	HUDSON AVE FLOODED.
Jul 29, 5:30 AM EDT	FLOOD	Sea Isle City, NJ	FLOODING REPORTED ALONG THE TOWNSEND INLET OF SEA ISLE CITY. TIME ESTIMATED.
Jul 29, 6:00 AM EDT	FLOOD	Sea Isle City, NJ	WATER SEVERAL INCHES DEEP ON ROADS.
Jul 29, 7:00 AM EDT	HEAVY RAIN 3.2	Cape May Court House, NJ
Jul 29, 7:20 AM EDT	HEAVY RAIN 3.43	Green Creek, NJ
Jul 29, 7:50 AM EDT	HEAVY RAIN 5.03	Wsw Wildwood Crest, NJ	24 HOUR RAINFALL.
Jul 29, 7:59 AM EDT	HEAVY RAIN 3.25	19 Ese Port Norris, NJ	12 HOUR RAINFALL.
Jul 29, 8:00 AM EDT	FLOOD	Wildwood, NJ	A FEW INCHES OF WATER ON THE ROAD AT 17TH AND NEW YORK.
Jul 29, 8:00 AM EDT	HEAVY RAIN 4.48	Cape May Airport, NJ
Jul 29, 8:00 AM EDT	HEAVY RAIN 4.74	1 Ssw Sea Isle City, NJ	24 HOUR RAINFALL.
Jul 29, 8:08 AM EDT	HEAVY RAIN 5.03	Wildwood Crest, NJ
Jul 29, 8:20 AM EDT	HEAVY RAIN 4	Cape May, NJ

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 9.2 hours before the alert went out and 217 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: 83 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 676 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

495 
WGUS51 KPHI 290913
FFWPHI
NJC009-291215-
/O.NEW.KPHI.FF.W.0035.170729T0913Z-170729T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
513 AM EDT SAT JUL 29 2017

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Southwestern Cape May County in southern New Jersey...

* Until 815 AM EDT

* At 513 AM EDT...Doppler radar indicated heavy rain across the
  warned area. Up to two inches of rain have already fallen. Flash
  flooding is expected to begin shortly in the areas of heaviest
  rain.

* Some locations that could experience flooding include...
  Cape May, North Wildwood, Wildwood Crest, Sea Isle City, Avalon,
  West Cape May, Stone Harbor, Cape May Court House, Scotch Bonnet,
  Diamond Beach, Green Creek, Goshen, Rio Grande, North Cape May,
  Villas, West Wildwood, Erma and Whitesboro-Burleigh.

Additional rainfall amounts of over one inch are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3892 7497 3893 7500 3908 7495 3918 7485
      3916 7465 3891 7486

$$

SFJ

2 follow-up statements

519 
WGUS71 KPHI 291041
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
641 AM EDT SAT JUL 29 2017

NJC009-291215-
/O.CON.KPHI.FF.W.0035.000000T0000Z-170729T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cape May NJ-
641 AM EDT SAT JUL 29 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 AM EDT FOR
SOUTHWESTERN CAPE MAY COUNTY...

At 639 AM EDT...local law enforcement reported flooding still on 
going near Wildwood, Sea Isle City, and Lower Township. Doppler 
radar indicated that the heavy rain had mostly moved out of the 
warned area. However, it will take time for the water to recede. 
Therefore, the flash flood warning continues.

Some locations that could experience flooding include...
Cape May, North Wildwood, Wildwood Crest, Sea Isle City, Avalon, West
Cape May, Stone Harbor, Cape May Court House, Scotch Bonnet, Diamond
Beach, Green Creek, Goshen, Rio Grande, North Cape May, Villas, West
Wildwood, Erma and Whitesboro-Burleigh.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3892 7497 3893 7500 3908 7495 3918 7485
      3916 7465 3891 7486

$$

SFJ

595 
WGUS71 KPHI 291211
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
811 AM EDT SAT JUL 29 2017

NJC009-291220-
/O.EXP.KPHI.FF.W.0035.000000T0000Z-170729T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cape May NJ-
811 AM EDT SAT JUL 29 2017

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN CAPE MAY COUNTY WILL
EXPIRE AT 815 AM EDT...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3892 7497 3893 7500 3908 7495 3918 7485
      3916 7465 3891 7486

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 8:52 PM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	23 hr
Jul 28, 10:25 PM EDT	Special Marine Warning	PHI		65 min
Jul 28, 11:13 PM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	4 hr
Jul 29, 1:10 AM EDT	Flash Flood Warning	PHI	Atlantic, Cumberland, Gloucester, Salem	4 hr
Jul 29, 3:03 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	4 hr
Jul 29, 4:14 AM EDT	Special Marine Warning	PHI		61 min
Jul 29, 5:08 AM EDT	Special Marine Warning	PHI		52 min
Jul 29, 6:48 AM EDT	Areal Flood Advisory	PHI	Atlantic, Cape May	117 min

Nearby

Flash Flood Warnings in New Jersey, 2017 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.