Alert archive / New Jersey / Flash Flood Warnings in 2017

Flash Flood Warning 17, NWS Philadelphia/Mount Holly

July 14, 20178 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 14, 2017, 4:13 PM EDT for 8 counties in New Jersey. It was in force for 3 hr. 8 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 14, 2017, 4:13 PM EDT (20:13 UTC)
Expired: Jul 14, 2017, 7:15 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Ocean County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 74 km from the middle of the area, began a volume at 20:17 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 14, 4:40 PM EDT	FLOOD	Newport, NJ	A FEW ROADS BECOMING IMPASSABLE.
Jul 14, 4:45 PM EDT	FLOOD	Bridgeton, NJ	BASEMENT FLOODING... MAYOR AITKEN DRIVE ALSO FLOODED.
Jul 14, 4:54 PM EDT	FLASH FLOOD	Bridgeton, NJ	SEVERAL CARS FLOODED TO ROOFTOPS AND STRANDED IN FLOOD WATERS.
Jul 14, 5:23 PM EDT	HEAVY RAIN 2.16	Millville Muni Airport, NJ	IN 28 MINUTES.
Jul 14, 5:50 PM EDT	FLOOD	Sea Isle City, NJ	FLOODING REPORTED ON 79TH AND LANDIS... OCCURRED AT LOW TIDE.
Jul 14, 5:53 PM EDT	HEAVY RAIN 3.3	Goshen, NJ
Jul 14, 6:00 PM EDT	FLOOD	Stone Harbor, NJ	VIDEO OF ROADWAY FLOODING SHARED ON SOCIAL MEDIA
Jul 14, 6:20 PM EDT	FLOOD	Sea Isle City, NJ	SEVERAL CARS WERE CAUGHT IN HIGH WATER.

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

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.2 hours before the alert went out and 159 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: 908 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 959 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

017 
WGUS51 KPHI 142013
FFWPHI
NJC001-005-007-009-011-015-029-033-142315-
/O.NEW.KPHI.FF.W.0017.170714T2013Z-170714T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
413 PM EDT FRI JUL 14 2017

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Atlantic County in southern New Jersey...
  Cumberland County in southern New Jersey...
  East central Salem County in southern New Jersey...
  South central Ocean County in southern New Jersey...
  Southeastern Camden County in southern New Jersey...
  Southeastern Gloucester County in southern New Jersey...
  Cape May County in southern New Jersey...
  Southeastern Burlington County in southern New Jersey...

* Until 715 PM EDT

* At 411 PM EDT...Doppler radar indicated a large cluster of 
  thunderstorms over western portions of southern New Jersey moving 
  east at about 25 MPH. Rainfall rates up to 2 inches per hour have 
  been reported. Flash flooding is expected in the areas of 
  heaviest rain through the afternoon commute.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3934 7441 3919 7462 3897 7481 3904 7496
      3915 7493 3919 7508 3916 7515 3928 7533
      3978 7520 3967 7412

$$

jjm

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 8:17 PM EDT	Special Weather Statement	PHI	Camden	43 min
Jul 13, 8:26 PM EDT	Special Weather Statement	PHI	Cape May	34 min
Jul 13, 8:27 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	4 hr
Jul 13, 8:49 PM EDT	Special Weather Statement	PHI	Cumberland	26 min
Jul 13, 8:51 PM EDT	Special Weather Statement	PHI	Atlantic	54 min
Jul 13, 9:07 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	53 min
Jul 13, 9:46 PM EDT	Special Weather Statement	PHI	Atlantic	14 min
Jul 13, 9:50 PM EDT	Special Marine Warning	PHI		115 min
Jul 13, 9:57 PM EDT	Special Weather Statement	PHI	Cape May	33 min
Jul 13, 10:42 PM EDT	Special Marine Warning	PHI		93 min
Jul 14, 7:21 AM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	3 hr
Jul 14, 11:40 AM EDT	Flash Flood Watch	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	11 hr
Jul 14, 2:57 PM EDT	Areal Flood Advisory	PHI	Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Ocean and 1 more	3 hr
Jul 14, 3:07 PM EDT	Special Marine Warning	PHI		53 min
Jul 14, 3:18 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	12 min
Jul 14, 3:23 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	67 min
Jul 14, 3:25 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Cumberland, Gloucester, Ocean, Salem	4 hr
Jul 14, 3:34 PM EDT	Flash Flood Warning	PHI	Gloucester, Salem	3 hr
Jul 14, 3:35 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Gloucester	55 min
Jul 14, 3:43 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Salem	47 min
Jul 14, 3:47 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Ocean	3 hr
Jul 14, 3:54 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	66 min
Jul 14, 4:12 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May	63 min
Jul 14, 4:18 PM EDT	Special Marine Warning	PHI		57 min
Jul 14, 4:25 PM EDT	Special Marine Warning	PHI		95 min
Jul 14, 4:44 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cape May, Cumberland, Gloucester, Salem	61 min
Jul 14, 4:54 PM EDT	Special Marine Warning	PHI		66 min
Jul 14, 5:47 PM EDT	Special Weather Statement	PHI	Cape May	13 min
Jul 14, 5:53 PM EDT	Special Marine Warning	PHI		52 min
Jul 14, 6:32 PM EDT	Special Marine Warning	PHI		88 min
Jul 14, 7:08 PM EDT	Special Marine Warning	PHI		97 min
Jul 14, 7:28 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	3 hr

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.