Alert archive / New Jersey / Flash Flood Warnings in 2007

Flash Flood Warning 34, NWS Philadelphia/Mount Holly

July 30, 2007Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 30, 2007, 3:03 PM EDT for Salem County, New Jersey. It was in force for 117 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 30, 2007, 3:03 PM EDT (19:03 UTC)
Expired: Jul 30, 2007, 5:00 PM EDT
In force: 117 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Salem County, NJ

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.1 hours before the alert went out and 65 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: 1360 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 510 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 22 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.

000 
WGUS51 KPHI 301905
FFWPHI
DEC003-MDC015-NJC033-302100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
303 PM EDT MON JUL 30 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL CECIL COUNTY IN NORTHEAST MARYLAND...
  CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  THIS INCLUDES THE CITY OF WILMINGTON...
  NORTHWESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 500 PM EDT

* AT 256 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAIN, IN EXCESS OF 2 INCHES IN ONE HOUR FROM A          
  THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PENNSVILLE...CARNEYS POINT...WILMINGTON MANOR...NEWPORT...NEW
  CASTLE AND BELLEFONTE

ADDITIONAL RAINFALL AMOUNTS OF 2 INCHES ARE POSSIBLE IN THE WARNED 
AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

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.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

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.

LAT...LON 3950 7596 3941 7578 3959 7533 3981 7545

$$

NIERENBERG

1 follow-up statement

000 
WGUS71 KPHI 302029
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
428 PM EDT MON JUL 30 2007

DEC003-MDC015-NJC033-302037-
CECIL MD-SALEM NJ-NEW CASTLE DE-
428 PM EDT MON JUL 30 2007

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL NEW
CASTLE...NORTHWESTERN SALEM AND EAST CENTRAL CECIL COUNTIES...

THE HEAVY RAIN PRODUCING THUNDERSTORM HAS WEAKENED CONSIDERABLY AND 
MOVED OUT OF THE AREA. HOWEVER, SOME LINGERING RUNOFF WILL STILL BE 
POSSIBLE FROM THE EARLIER HEAVY RAINFALL.

LAT...LON 3950 7596 3941 7578 3959 7533 3981 7545

$$

GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 11:01 AM EDT	Marine Weather Statement	PHI		119 min
Jul 30, 11:28 AM EDT	Special Marine Warning	PHI		62 min

Nearby

Flash Flood Warnings in New Jersey, 2007 Every flash flood warning in 2007

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.