Alert archive / New Jersey / Flash Flood Warnings in 2003

Flash Flood Warning 39, NWS Philadelphia/Mount Holly

August 13, 2003Warren County, New Jersey; Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 13, 2003, 3:39 PM EDT for Warren County, New Jersey; Northampton County, Pennsylvania. 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 counties it named.

The facts

Issued: Aug 13, 2003, 3:39 PM EDT (19:39 UTC)
Expired: Aug 13, 2003, 6:45 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

Counties Warren County, NJ, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 114 km from the middle of the area, began a volume at 19:40 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, 7.7 hours before the alert went out and 169 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: 1101 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 827 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 131944
FFWPHI
NJC041-PAC095-132245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
339 PM EDT WED AUG 13 2003

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA
  CENTRAL WARREN COUNTY IN NORTHWEST NEW JERSEY

* UNTIL 645 PM EDT.

* AT 334 PM EDT...WEATHER SERVICE RADAR INDICATED INTENSE RAINFALL   
  WITH ASSOCIATED CLOUD TO GROUND LIGHTNING. THE HEAVIEST RAIN WAS   
  FALLING BETWEEN PORTLAND PENNSYLVANIA AND BELVIDERE NEW JERSEY.

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.

INTENSE LIGHTNING IS ALSO OCCURRING WITH THIS STORM. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING TELEPHONES UNLESS IT IS AN EMERGENCY. IF OUTDOORS...STAY AWAY
FROM ISOLATED HIGH OBJECTS SUCH AS TREES.

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

$$

LAT...LON 4083 7523 4079 7503 4087 7489 4092 7518

KRUZDLO

2 follow-up statements

000 
WGUS71 KPHI 132056
FFSPHI
NJC041-PAC095-132245-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
455 PM EDT WED AUG 13 2003

...A FLASH FLOOD WARNING CONTINUES FOR NORTHEASTERN NORTHAMPTON 
COUNTY IN EASTERN PENNSYLVANIA AND FOR CENTRAL WARREN COUNTY IN NEW 
JERSEY...

COUNTY OFFICIALS REPORTED THAT SEVERAL ROADS WERE WASHED OUT BETWEEN 
PORTLAND AND UPPER MOUNT BETHEL IN NORTHAMPTON COUNTY, WHILE MASSIVE 
AMOUNTS OF RAIN HAD FALLEN IN WARREN COUNTY, SPECIFICALLY WHITE 
TOWNSHIP. 

THE THUNDERSTORMS THAT WEE RESPONSIBLE FOR THE HEAVY RAIN HAVE MOVED 
TO THE SOUTH AND EAST OF THIS AREA. BUT AT 445 PM...NATIONAL WEATHER 
SERVICE DOPPLER RADAR INDICATED MORE HEAVY SHOWERS AND THUNDERSTORMS 
WERE FORMING OVER EAST STROUDSBURG IN MONROE COUNTY AND WERE MOVING 
TOWARD THE WARNED AREA.

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.

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

REPEATING...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHEASTERN 
NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA AND FOR CENTRAL WARREN 
COUNTY IN NEW JERSEY UNTIL 645 PM.

$$

KRUZDLO

000 
WGUS71 KPHI 132202
FFSPHI
NJC041-PAC095-132330-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
559 PM EDT WED AUG 13 2003

...THE FLASH FLOOD WARNING FOR NORTHEASTERN NORTHAMPTON COUNTY IN 
EASTERN PENNSYLVANIA AND FOR CENTRAL WARREN COUNTY IN NEW JERSEY 
HAS BEEN CANCELLED...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE RAINFALL HAS 
ENDED ACROSS THE WARNED AREA...AND THE FLOOD THREAT WAS DIMINISHING.

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

$$

KRUZDLO

Nearby

Flash Flood Warnings in New Jersey, 2003 Flash Flood Warnings in Pennsylvania, 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.