Alert archive / New Jersey / Flash Flood Warnings in 2004

Flash Flood Warning 16, NWS Philadelphia/Mount Holly

July 12, 2004Cecil County, Maryland; 7 counties in New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 12, 2004, 2:52 PM EDT for Cecil County, Maryland; 7 counties in New Jersey. It was in force for 78 days. 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 12, 2004, 2:52 PM EDT (18:52 UTC)
Expired
Sep 28, 2004, 8:45 PM EDT
In force
78 days
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

Counties Cecil County, MD, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ

The radar

The Philadelphia radar (KDIX), 91 km from the middle of the area, began a volume at 18:55 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, 6.9 hours before the alert went out and 162 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2004-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2004-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1177 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
101 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 121853
FFWPHI
MDC015-122045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
252 PM EDT MON JUL 12 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL CECIL COUNTY IN NORTHEAST MARYLAND

* UNTIL 445 PM EDT

* AT 247 PM EDT...FLASH FLOODING WAS REPORTED FROM A THUNDERSTORM
  NEAR NORTH EAST...OR ABOUT 14 MILES SOUTHWEST OF NEWARK...MOVING   
  NORTHEAST AT 20 MPH. 2 TO 3 INCHES OF RAIN HAS FALLEN IN SOME      
  LOCATIONS SINCE RAIN BEGAN EARLIER TODAY.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL IS CAUSING FLOODING OF 
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND 
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.


LAT...LON 3959 7609 3944 7597 3941 7578 3966 7580

$$

JJM
1 follow-up statement
000 
WGUS51 KPHI 282046
FFWPHI
NJC019-021-023-027-035-037-041-290045-
/X.NEW.KPHI.FF.W.0016.040928T2044Z-040929T0045Z/
/0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
444 PM EDT TUE SEP 28 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY
  MIDDLESEX COUNTY IN NORTHERN NEW JERSEY
  MORRIS COUNTY IN NORTHERN NEW JERSEY
  SOMERSET COUNTY IN NORTHERN NEW JERSEY
  HUNTERDON COUNTY IN NORTHWEST NEW JERSEY
  SUSSEX COUNTY IN NORTHWEST NEW JERSEY
  WARREN COUNTY IN NORTHWEST NEW JERSEY

* UNTIL 845 PM EDT

* AT 441 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A LARGE AREA OF HEAVY RAIN THROUGHOUT CENTRAL AND NORTHERN
  NEW JERSEY. MORE RAIN IS ON THE WAY. FLOODING...ESPECIALLY IN LOW
  LYING AREAS AND IN AREAS OF POOR DRAINAGE...IS EXPECTED THROUGH A 
  GOOD PORTION OF THE EVENING HOURS. SMALL STREAM FLOODING IS ALSO
  EXPECTED.

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 UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

LAT...LON 4054 7506 4023 7464 4042 7431 4095 7434
      4130 7471 4101 7502 4070 7510

$$

JJM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:50 AM EDTFlash Flood WarningPHICecil68 days
Jul 12, 8:28 AM EDTFlash Flood WarningPHICecil, Kent, Queen Anne's78 days
Jul 12, 1:09 PM EDTSevere Thunderstorm WarningPHICecil51 min
Jul 12, 1:17 PM EDTTornado WarningPHICecil43 min
Jul 12, 4:49 PM EDTFlash Flood WarningPHICecil78 days
Jul 12, 5:26 PM EDTSevere Thunderstorm WarningPHITalbot49 min
Jul 12, 5:45 PM EDTFlash Flood WarningPHICaroline, Cecil, Kent, Queen Anne's, Talbot78 days
Jul 12, 6:51 PM EDTFlash Flood WarningPHICecil78 days

Nearby

Flash Flood Warnings in New Jersey, 2004Flash Flood Warnings in Maryland, 2004Every flash flood warning in 2004

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.