Alert archive / New Jersey / Flash Flood Warnings in 2014

Flash Flood Warning 27, NWS Philadelphia/Mount Holly

July 10, 2014Atlantic County, Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 10, 2014, 9:23 AM EDT for Atlantic County, Cape May County, New Jersey. It was in force for 4 hr. 2 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 10, 2014, 9:23 AM EDT (13:23 UTC)
Expired: Jul 10, 2014, 1:15 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Atlantic County, NJ, Cape May County, NJ

The radar

The Philadelphia radar (KDIX), 77 km from the middle of the area, began a volume at 13:26 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 10, 10:29 AM EDT	HEAVY RAIN 4.32	Beesleys Point, NJ
Jul 10, 10:30 AM EDT	FLASH FLOOD	Ocean City, NJ	MODERATE STREET FLOODING WITH MANY ROADS COVERED WITH WATER THROUGHOUT OCEAN CITY. WATER 2 TO 3 FEET HIGH IN SOME AREAS WITH WATER UP TO THE FRONT ENTRANCE OF BUSINESSES AND HOMES.

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 1.4 hours before the alert went out and 130 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: 881 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 594 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -1.9

Open this sounding in Storm Lab

The text

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

559 
WGUS51 KPHI 101323
FFWPHI
NJC001-009-101715-
/O.NEW.KPHI.FF.W.0027.140710T1323Z-140710T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
923 AM EDT THU JUL 10 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN ATLANTIC COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...VENTNOR CITY...ATLANTIC CITY...
  NORTHERN CAPE MAY COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF OCEAN CITY...

* UNTIL 115 PM EDT

* AT 917 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA. RADAR 
ESTIMATES INDICATE 3 TO 4 INCHES OF RAIN HAS FALLEN OVER THE AREA. 
RAINFALL AMOUNTS IN EXCESS OF 3 INCHES WAS REPORTED AT A RAIN GAGE 
IN BEESLEY'S POINT.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OCEAN 
CITY...LONGPORT...VENTNOR CITY...SOMERS POINT...NORTHFIELD AND 
MARGATE CITY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 INCH ARE POSSIBLE IN THE WARNED 
AREA.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MOUNT
HOLLY NJ.

&&

LAT...LON 3935 7441 3935 7444 3929 7454 3928 7455
      3921 7464 3914 7469 3915 7488 3921 7491
      3924 7488 3937 7456 3937 7440

$$

JRK

1 follow-up statement

934 
WGUS71 KPHI 101500
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1100 AM EDT THU JUL 10 2014

NJC001-009-101715-
/O.CON.KPHI.FF.W.0027.000000T0000Z-140710T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAPE MAY NJ-ATLANTIC NJ-
1100 AM EDT THU JUL 10 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 PM EDT FOR
SOUTHEASTERN ATLANTIC AND NORTHERN CAPE MAY COUNTIES...

AT 1055 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED 3 
TO 5 INCHES OF RAIN HAS FALLEN OVER NORTHERN PORTIONS OF CAPE MAY 
COUNTY AND SOUTHERN PORTIONS OF ATLANTIC COUNTY, WHICH IS CONFIRMED 
BY A MESONET SITE REPORTING RAINFALL OF OVER 4 INCHES AT BEESLEY'S 
POINT. MOST OF THIS RAIN HAS FALLEN IN JUST A THREE HOUR PERIOD. 

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
 
SHOWERS AND THUNDERSTORMS WILL CONTINUE TO PRODUCING MODERATE TO 
LOCALLY HEAVY RAIN OVER THE WARNED AREA. ADDITIONAL THUNDERSTORMS 
DEVELOPING OVER THE DELAWARE BAY WILL MOVE INTO DENNIS...WOODBINE 
AND SEA ISLE CITY AROUND MIDDAY. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OCEAN CITY...
LONGPORT...VENTNOR CITY...SOMERS POINT...NORTHFIELD...MARGATE CITY...
BEESLEYS POINT AND ATLANTIC CITY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MOUNT
HOLLY NJ.

&&

LAT...LON 3935 7441 3935 7444 3929 7454 3928 7455
      3921 7464 3914 7469 3915 7488 3921 7491
      3924 7488 3937 7456 3937 7440

$$

JRK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 8:19 AM EDT	Special Marine Warning	PHI		86 min
Jul 10, 8:33 AM EDT	Special Marine Warning	PHI		42 min
Jul 10, 8:36 AM EDT	Special Weather Statement	PHI	Cumberland	39 min
Jul 10, 9:55 AM EDT	Special Weather Statement	PHI	Cape May	65 min
Jul 10, 3:14 PM EDT	Flash Flood Watch	PHI	Atlantic, Cape May, Cumberland, Salem	9 hr
Jul 10, 4:39 PM EDT	Special Marine Warning	PHI		96 min
Jul 10, 6:27 PM EDT	Special Weather Statement	PHI	Morris	63 min
Jul 10, 7:02 PM EDT	Flash Flood Warning	PHI	Morris, Somerset	3 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.