Alert archive / New Jersey / Flash Flood Warnings in 2014

Flash Flood Warning 16, NWS Philadelphia/Mount Holly

July 2, 2014Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 2, 2014, 4:34 PM EDT for Sussex County, New Jersey. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 2, 2014, 4:34 PM EDT (20:34 UTC)
Expired: Jul 2, 2014, 8:30 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 20:37 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, 8.6 hours before the alert went out and 155 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: 1089 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 836 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

358 
WGUS51 KPHI 022034
FFWPHI
NJC037-030030-
/O.NEW.KPHI.FF.W.0016.140702T2034Z-140703T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
434 PM EDT WED JUL 2 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  THIS INCLUDES THE CITY OF HIGH POINT...

* UNTIL 830 PM EDT

* AT 428 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  TWO TO TWO AND A HALF INCHES HAS FALLEN ACROSS THE THE WARNED AREA 
  WITH ANOTHER INCH OR TWO POSSIBLE. AN ADDITIONAL INCH OR TWO OF 
  RAINFALL IS EXPECTED ALONG WITH SOME FLASH FLOODING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VERNON
  VALLEY...SUSSEX...HIGH POINT...HAINESVILLE AND PELLETTOWN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 4124 7443 4123 7443 4119 7451 4102 7488
      4109 7497 4109 7499 4135 7467

$$

ROBERTSON

1 follow-up statement

926 
WGUS71 KPHI 022217
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
617 PM EDT WED JUL 2 2014

NJC037-022226-
/O.CAN.KPHI.FF.W.0016.000000T0000Z-140703T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX NJ-
617 PM EDT WED JUL 2 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHERN SUSSEX
COUNTY...

THE HEAVY RAIN THAT PROMPTED THE WARNING HAS EXITED THE AREA. 
THEREFORE THE FLASH FLOOD WARNING HAS BEEN CANCELLED. ADDITIONAL 
SHOWERS AND THUNDERSTORMS REMAIN POSSIBLE THROUGH THIS EVENING.

LAT...LON 4124 7443 4123 7443 4119 7451 4102 7488
      4109 7497 4109 7499 4135 7467

$$

ROBERTSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 3:59 AM EDT	Small Craft Advisory	PHI		18 hr
Jul 2, 2:48 PM EDT	Special Weather Statement	PHI	Sussex	42 min
Jul 2, 3:30 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	60 min
Jul 2, 3:36 PM EDT	Flash Flood Watch	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	46 hr
Jul 2, 3:58 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	4 hr
Jul 2, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	57 min
Jul 2, 5:01 PM EDT	Areal Flood Advisory	PHI	Morris, Sussex, Warren	3 hr
Jul 2, 5:08 PM EDT	Special Weather Statement	PHI	Hunterdon	52 min
Jul 2, 5:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	67 min
Jul 2, 5:42 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Somerset	3 hr
Jul 2, 5:56 PM EDT	Special Weather Statement	PHI	Warren	49 min
Jul 2, 6:06 PM EDT	Special Weather Statement	PHI	Somerset	24 min
Jul 2, 6:13 PM EDT	Flash Flood Warning	PHI	Hunterdon	4 hr
Jul 2, 6:31 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	42 min
Jul 2, 7:09 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Somerset	4 hr
Jul 2, 7:15 PM EDT	Flash Flood Warning	PHI	Hunterdon, Middlesex, Somerset	4 hr
Jul 2, 7:16 PM EDT	Special Weather Statement	PHI	Middlesex, Somerset	59 min
Jul 2, 7:35 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer	55 min
Jul 2, 7:48 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	27 min
Jul 2, 7:52 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester, Salem	4 hr
Jul 2, 7:58 PM EDT	Special Marine Warning	PHI		62 min

Nearby

Flash Flood Warnings in New Jersey, 2014 Every flash flood warning in 2014

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.