Alert archive / New Jersey / Flash Flood Warnings in 2018

Flash Flood Warning 110, NWS Philadelphia/Mount Holly

October 12, 20185 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 12, 2018, 1:52 AM EDT for 5 counties in New Jersey. It was in force for 4 hr. 4 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: Oct 12, 2018, 1:52 AM EDT (05:52 UTC)
Expired: Oct 12, 2018, 5:45 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Atlantic County, NJ, Burlington County, NJ, Cape May County, NJ, Cumberland County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 05:52 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
Oct 12, 4:04 AM EDT	FLOOD	1 Ssw South Vineland, NJ	FLOODING ON NJ 55 AT EXIT 26.
Oct 12, 4:04 AM EDT	FLOOD	1 Ssw South Vineland, NJ	FLOODING ON NJ 55 NORTHBOUND AT EXIT 27 (NJ 47). 1 LANE MAY BE BLOCKED.
Oct 12, 4:07 AM EDT	FLOOD	Lower Twp, NJ	FLOODING ON NJ 47 NORTH OF CR 624/WEST RIO GRAND AVE. ALL LANES CLOSE AND DETOURED.
Oct 12, 4:15 AM EDT	FLOOD	North Wildwood, NJ	FLOODING ON NJ 147 BETWEEN NEW YORK AVE/WALNUT AVE AND W ANGLESEA DR. ALL LANES CLOSED AND DETOURED.

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 00:00Z, 5.9 hours before the alert went out and 174 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: 959 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 634 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

As transmitted.

131 
WGUS51 KPHI 120552
FFWPHI
NJC001-005-009-011-029-120945-
/O.NEW.KPHI.FF.W.0110.181012T0552Z-181012T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
152 AM EDT FRI OCT 12 2018

The National Weather Service in Mount Holly NJ has issued a

* Flash Flood Warning for...
  Atlantic County in southern New Jersey...
  Eastern Cumberland County in southern New Jersey...
  Ocean County in southern New Jersey...
  Cape May County in southern New Jersey...
  Southeastern Burlington County in southern New Jersey...

* Until 545 AM EDT.

* At 151 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. Rain 
  rates are exceeding two inches per hour.

* Some locations that could experience flooding include...
  Toms River, Vineland, Atlantic City, Millville, Ocean City, Cape
  May, Cumberland, Barnegat, Pleasantville, Hammonton, Beachwood,
  Somers Point, Ventnor City, Brigantine, Northfield, Absecon,
  Margate City, Buena, Egg Harbor City and North Wildwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3969 7410 3942 7430 3919 7462 3891 7486
      3893 7499 3915 7492 3919 7508 3916 7515
      3924 7526 3992 7449 4007 7403

$$

Kruzdlo

1 follow-up statement

846 
WGUS71 KPHI 120937
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
537 AM EDT FRI OCT 12 2018

NJC001-005-009-011-029-120946-
/O.EXP.KPHI.FF.W.0110.000000T0000Z-181012T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Atlantic NJ-Cumberland NJ-Ocean NJ-Cape May NJ-Burlington NJ-
537 AM EDT FRI OCT 12 2018

...THE FLASH FLOOD WARNING FOR ATLANTIC...EASTERN CUMBERLAND...
OCEAN...CAPE MAY AND SOUTHEASTERN BURLINGTON COUNTIES WILL EXPIRE AT
545 AM EDT...

This flash flood warning has been converted to a flood warning. Two 
to four inches of rain fell overnight and it will take some time to 
drain and recede.


LAT...LON 3969 7410 3942 7430 3919 7462 3891 7486
      3893 7499 3915 7492 3919 7508 3916 7515
      3924 7526 3992 7449 4007 7403

$$

Robertson

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 8:09 PM EDT	Special Weather Statement	PHI	Salem	36 min
Oct 11, 8:27 PM EDT	Areal Flood Advisory	PHI	Cumberland, Gloucester, Salem	8 hr
Oct 11, 8:41 PM EDT	Special Weather Statement	PHI	Gloucester, Salem	34 min
Oct 11, 9:10 PM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	35 min
Oct 11, 9:43 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	8 hr
Oct 11, 10:45 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more	3 hr
Oct 11, 11:54 PM EDT	High Wind Warning	PHI	Cape May	9 hr
Oct 12, 12:08 AM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	4 hr
Oct 12, 12:14 AM EDT	Storm Warning	PHI		9 hr
Oct 12, 12:50 AM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Monmouth, Ocean	3 hr
Oct 12, 1:15 AM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	40 min
Oct 12, 2:55 AM EDT	Areal Flood Advisory	PHI	Gloucester, Hunterdon, Mercer, Middlesex, Somerset, Warren	2 hr
Oct 12, 3:17 AM EDT	Flash Flood Warning	PHI	Burlington, Mercer, Monmouth, Ocean	4 hr
Oct 12, 3:46 AM EDT	Areal Flood Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	7 hr
Oct 12, 5:32 AM EDT	Areal Flood Warning	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	4 hr
Oct 12, 7:02 AM EDT	Areal Flood Warning	PHI	Burlington, Mercer, Monmouth, Ocean	4 hr
Oct 12, 11:42 AM EDT	Coastal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean	4 hr
Oct 12, 11:45 AM EDT	Small Craft Advisory	PHI		12 hr
Oct 12, 3:20 PM EDT	River Flood Warning	PHI	Burlington	37 hr

Nearby

Flash Flood Warnings in New Jersey, 2018 Every flash flood warning in 2018

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.