Alert archive / New Jersey / Flash Flood Warnings in 2004

Flash Flood Warning 19, NWS Philadelphia/Mount Holly

July 12, 20049 counties in New Jersey; Kent County, New Castle County, Sussex County, Delaware; 5 counties in Maryland

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 12, 2004, 5:45 PM EDT for 9 counties in New Jersey; Kent County, New Castle County, Sussex County, Delaware; 5 counties in Maryland. It was in force for 78 days. 1 report 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 12, 2004, 5:45 PM EDT (21:45 UTC)
Expired: Sep 28, 2004, 8:30 PM EDT
In force: 78 days
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ

The radar

The Philadelphia radar (KDIX), 51 km from the middle of the area, began a volume at 21:48 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 14, 5:55 PM EDT	HEAVY RAIN 0	Rosenhayn, NJ	STREET FLOODING REPORTED.

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, 9.8 hours before the alert went out and 103 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: 76 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 143 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 122147
FFWPHI
NJC001-005-007-011-015-021-025-029-033-130045-

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY 
  MONMOUTH COUNTY IN CENTRAL NEW JERSEY  
  ATLANTIC COUNTY IN SOUTHERN NEW JERSEY
  BURLINGTON COUNTY IN SOUTHERN NEW JERSEY
  CAMDEN COUNTY IN SOUTHERN NEW JERSEY
  CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY
  GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY
  OCEAN COUNTY IN SOUTHERN NEW JERSEY
  SALEM COUNTY IN SOUTHERN NEW JERSEY

* UNTIL 845 PM EDT

* AT 539 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  UP TO 5 INCHES OF RAIN HAS FALLEN OVER SOUTHERN NEW JERSEY SINCE
  PRECIPITATION BEGAN EARLY THIS MORNING. DOPPLER RADAR CONTINUES    
  TO SHOW MORE RAIN MOVING INTO THE AREA. JJM


FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.


LAT...LON 3962 7545 3925 7500 3998 7413 4019 7469

$$

1 follow-up statement

000 
WGUS51 KPHI 282132
FFWPHI
DEC001-003-005-MDC011-015-029-035-041-290030-
/X.NEW.KPHI.FF.W.0019.040928T2130Z-040929T0030Z/
/0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KENT COUNTY IN CENTRAL DELAWARE
  CAROLINE COUNTY IN EASTERN MARYLAND
  TALBOT COUNTY IN EASTERN MARYLAND
  CECIL COUNTY IN NORTHEAST MARYLAND
  KENT COUNTY IN NORTHEAST MARYLAND
  QUEEN ANNES COUNTY IN NORTHEAST MARYLAND
  NEW CASTLE COUNTY IN NORTHERN DELAWARE
  SUSSEX COUNTY IN SOUTHERN DELAWARE

* UNTIL 830 PM EDT

* AT 526 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAIN CONTINUING OVER THE AREA WITH MORE RAIN ON THE WAY.     
  FLOODING OF POOR DRAINAGE AREAS AND SMALL STREAMS IS EXPECTED
  TO CONTINUE OVER THE AREA INTO THE EVENING HOURS.

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. TURN AROUND, DONT DROWN.

LAT...LON 3872 7590 3885 7611 3935 7613 3937 7601
      3941 7604 3956 7598 3957 7599 3954 7600
      3958 7611 3970 7615 3972 7579 3976 7573
      3978 7556 3955 7564 3907 7540 3865 7514
      3860 7515 3856 7509

$$

JJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 2:52 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more	78 days
Jul 12, 8:28 AM EDT	Flash Flood Warning	PHI	Kent, New Castle	78 days
Jul 12, 1:53 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	37 min
Jul 12, 2:22 PM EDT	Tornado Warning	PHI	New Castle	38 min
Jul 12, 3:05 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	55 min
Jul 12, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Kent	54 min
Jul 12, 4:08 PM EDT	Tornado Warning	PHI	Kent	37 min
Jul 12, 4:33 PM EDT	Flash Flood Warning	PHI	Kent, New Castle	78 days
Jul 12, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Kent	36 min
Jul 12, 7:32 PM EDT	Flash Flood Warning	PHI	Kent, New Castle	78 days
Jul 12, 7:50 AM EDT	Flash Flood Warning	PHI	Cecil	68 days
Jul 12, 1:09 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	51 min
Jul 12, 1:17 PM EDT	Tornado Warning	PHI	Cecil	43 min
Jul 12, 4:49 PM EDT	Flash Flood Warning	PHI	Cecil	78 days
Jul 12, 5:26 PM EDT	Severe Thunderstorm Warning	PHI	Talbot	49 min
Jul 12, 6:51 PM EDT	Flash Flood Warning	PHI	Cecil	78 days

Nearby

Flash Flood Warnings in New Jersey, 2004 Flash Flood Warnings in Maryland, 2004 Flash Flood Warnings in Delaware, 2004 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.