Alert archive / New Jersey / Flash Flood Warnings in 2003

Flash Flood Warning 55, NWS Philadelphia/Mount Holly

November 5, 2003Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Nov 5, 2003, 6:17 PM EST for Mercer County, New Jersey. It was in force for 3 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: Nov 5, 2003, 6:17 PM EST (23:17 UTC)
Expired: Nov 5, 2003, 9:15 PM EST
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Mercer County, NJ

The radar

The Philadelphia radar (KDIX), 46 km from the middle of the area, began a volume at 23:21 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.3 hours before the alert went out and 151 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 529 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 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 052319
FFWPHI
NJC021-060215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
617 PM EST WED NOV 5 2003

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY

* UNTIL 915 PM EST.

* AT 615 PM EST...WEATHER SERVICE RADAR INDICATED THUNDERSTORMS
  WITH TORRENTIAL DOWNPOURS MOVING THROUGH MERCER COUNTY. A 
  SKYWARN SPOTTER REPORTED NEARLY AN INCH OF RAIN WITHIN 20 MINUTES.
  ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN ARE CURRENTLY UPSTREAM
  THROUGH BUCKS COUNTY AND WILL MOVE ACROSS MERCER COUNTY.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. 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. VEHICLES
CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER
GROUND.

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.

LAT...LON 4039 7469 4024 7453 4017 7470 4031 7485

$$

TFG

1 follow-up statement

000 
WGUS71 KPHI 060045
FFSPHI
NJC021-PAC017-029-091-060215-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
737 PM EST WED NOV 5 2003

...FLASH FLOOD WARNINGS REMAIN IN EFFECT FOR CHESTER...MONTGOMERY...
BUCKS AND MERCER COUNTIES...

THE FLASH FLOOD WARNINGS REMAIN IN EFFECT FOR CHESTER... 
MONTGOMERY...BUCKS AND MERCER COUNTIES. THE HEAVIEST RAIN HAS
MOVED AWAY FROM THE WARNED COUNTIES. BUT RISES ON STREAMS 
ARE CONTINUING AND LEFTOVER POOR DRAINAGE FLOODING PERSISTED.

THE VALLEY CREEK IN CHESTER COUNTY SHOULD BE CRESTING CLOSE TO ITS
SEVEN FOOT FLOOD STAGE DURING THE NEXT HOUR. SIGNIFICANT BUT WITHIN 
BANKFULL RISES ARE EXPECTED ALONG THE ASSUNPINK CREEK IN MERCER 
COUNTY AND THE NESHAMINY CREEK IN BUCKS COUNTY.  
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN THE WATER BEGINS RISING.
AVOID ROADS THAT ARE PRONE TO POOR DRAINAGE FLOODING. FALLEN LEAVES 
WILL EXACERBATE THE FLOODING AS THEY WILL EITHER CLOG OR IMPEDE THE 
FLOW OF WATER INTO CATCH BASINS. 

STAY TUNED TO NOAA WEATHER RADIO OR OTHER MEDIA FOR THE LATEST 
WEATHER INFORMATION.

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 5, 6:40 PM EST	Special Marine Warning	PHI		95 min

Nearby

Flash Flood Warnings in New Jersey, 2003 Every flash flood warning in 2003

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.