Alert archive / New Jersey / Flash Flood Watches in 2006

Flash Flood Watch 8, NWS Philadelphia/Mount Holly

November 15, 20064 states

NWS Philadelphia/Mount Holly issued this flash flood watch at Nov 15, 2006, 2:47 PM EST for 4 states. It took effect at Nov 16, 2006, 1:00 PM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Nov 15, 2006, 2:47 PM EST (19:47 UTC)
In effect from
Nov 16, 2006, 1:00 PM EST
Expired
Nov 16, 2006, 9:00 PM EST
In force
8 hr
Issued by
NWS Philadelphia/Mount Holly
Flood severity
None

Counties New Castle County, DE, Cecil County, MD, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Carbon County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 74 km from the middle of the area, began a volume at 19:52 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, 7.8 hours before the alert went out and 196 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 2006-11-15Temperature 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 2006-11-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
762 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
125 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 
WGUS61 KPHI 151947
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
247 PM EST WED NOV 15 2006

DEZ001-MDZ008-NJZ001-007>010-012-013-015-017>019-PAZ054-055-
060>062-067>071-161030-
/O.NEW.KPHI.FF.A.0008.061116T1800Z-061117T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-
MIDDLESEX-WESTERN MONMOUTH-MERCER-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON...
WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE...
NEW BRUNSWICK...FREEHOLD...TRENTON...GLASSBORO...CAMDEN...
CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE...
STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON...
WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA
247 PM EST WED NOV 15 2006

...FLASH FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH
LATE THURSDAY NIGHT...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A

* FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE...
  NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW 
  JERSEY...SOUTHERN NEW JERSEY...EAST CENTRAL PENNSYLVANIA...
  NORTHEAST PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA...INCLUDING 
  THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE IN 
  NORTHEAST MARYLAND...CECIL IN CENTRAL NEW JERSEY...MERCER AND 
  WESTERN MONMOUTH IN NORTHERN NEW JERSEY...HUNTERDON...
  MIDDLESEX...MORRIS...SOMERSET...SUSSEX AND WARREN IN SOUTHERN 
  NEW JERSEY...CAMDEN...GLOUCESTER AND NORTHWESTERN BURLINGTON 
  IN EAST CENTRAL PENNSYLVANIA...BERKS...LEHIGH AND NORTHAMPTON 
  IN NORTHEAST PENNSYLVANIA...CARBON AND MONROE IN SOUTHEAST 
  PENNSYLVANIA...BUCKS...CHESTER...DELAWARE...MONTGOMERY AND 
  PHILADELPHIA.

* FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT

* LOW PRESSURE OVER THE LOWER MISSISSIPPI RIVER VALLEY LATE THIS
  AFTERNOON WILL LIFT THROUGH THE GREAT LAKES REGION AND INTO
  SOUTHEAST CANADA BY LATE THURSDAY NIGHT. THE LOW WILL PULL A
  DYNAMIC COLD FRONT ACROSS OUR REGION ON THURSDAY NIGHT. IT WILL
  RESULT IN RAIN...POSSIBLE THUNDERSTORMS AND ASSOCIATED WINDS. 

* OVER EASTERN PENNSYLVANIA...MUCH OF NEW JERSEY...NORTHERN DELAWARE
  AND THE NORTHERN MARYLAND EASTERN...WIDESPREAD ONE TO TWO INCH
  RAINFALL IS FORECAST...AND UP TO THREE INCHES OF RAIN IS
  POSSIBLE WHERE ANY THUNDERSTORMS MIGHT DEVELOP. HEAVY RAIN IS
  EXPECTED TO BEGIN LATE THURSDAY AFTERNOON AND CONTINUE THROUGH
  MIDNIGHT. GIVEN THE SATURATED STATE OF THE GROUND...THESE AMOUNTS
  COULD RESULT IN FLOODING OF STREAMS...CREEKS AND POOR DRAINAGE
  AREAS AND COULD ALSO RESULT IN SUDDEN FLOODING OF AREAS NOT
  NORMALLY PRONE TO FLOODING.

* WINDS WITH THE FRONT ARE FORECAST TO RANGE BETWEEN 15 AND 25 MPH
  WITH GUSTS UP TO AROUND 35 MPH. HOWEVER...IF THUNDERSTORMS DO DEVELOP
  AND CAUSE WINDS ALOFT TO MIX TO THE SURFACE...STRONGER WIND GUSTS
  THAT COULD FELL TREES AND LEAD TO SCATTERED POWER OUTAGES ARE
  POSSIBLE. 

  A FLASH FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR HEAVY
  RAIN ACROSS THE WATCH AREA...WHICH MAY LEAD TO FLOODING ALONG
  STREAMS...CREEKS...AREAS OF POOR DRAINAGE AND SOME AREAS NOT
  NORMALLY PRONE TO FLOODING. IF YOU ARE IN THE WATCH AREA...CHECK
  YOUR PREPAREDNESS REQUIREMENTS. KEEP INFORMED...AND BE READY FOR
  ACTION IF FLOODING IS OBSERVED OR IF A FLOOD WARNING IS ISSUED.

$$

ROBERTSON/DELISI
3 follow-up statements
000 
WGUS61 KPHI 160915
FFAPHI

FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
415 AM EST THU NOV 16 2006

DEZ001-MDZ008-NJZ001-007>010-012-013-015-017>019-PAZ054-055-
060>062-067>071-162100-
/O.CON.KPHI.FF.A.0008.061116T1800Z-061117T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-
MIDDLESEX-WESTERN MONMOUTH-MERCER-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON...
WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE...
NEW BRUNSWICK...FREEHOLD...TRENTON...GLASSBORO...CAMDEN...
CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE...
STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON...
WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA
415 AM EST THU NOV 16 2006

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 1 PM EST THIS
AFTERNOON THROUGH LATE TONIGHT...

THE FLASH FLOOD WATCH CONTINUES FOR

* PORTIONS OF NORTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL 
  NEW JERSEY...NORTHERN NEW JERSEY...SOUTHERN NEW JERSEY...EAST 
  CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST 
  PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN 
  DELAWARE...NEW CASTLE IN NORTHEAST MARYLAND...CECIL IN CENTRAL 
  NEW JERSEY...MERCER AND WESTERN MONMOUTH IN NORTHERN NEW 
  JERSEY...HUNTERDON...MIDDLESEX...MORRIS...SOMERSET...SUSSEX 
  AND WARREN IN SOUTHERN NEW JERSEY...CAMDEN...GLOUCESTER AND 
  NORTHWESTERN BURLINGTON IN EAST CENTRAL PENNSYLVANIA...BERKS...
  LEHIGH AND NORTHAMPTON IN NORTHEAST PENNSYLVANIA...CARBON AND 
  MONROE IN SOUTHEAST PENNSYLVANIA...BUCKS...CHESTER...
  DELAWARE...MONTGOMERY AND PHILADELPHIA.

* FROM 1 PM EST THIS AFTERNOON THROUGH LATE TONIGHT

* A LOW PRESSURE SYSTEM OVER THE TENNESSEE RIVER VALLEY WILL LIFT
  THROUGH THE GREAT LAKES REGION AND INTO SOUTHEAST CANADA BY LATE
  TONIGHT. THE LOW WILL PUSH A DYNAMIC COLD FRONT ACROSS OUR REGION
  TONIGHT. IT WILL RESULT IN NUMEROUS SHOWERS...POSSIBLY SOME
  THUNDERSTORMS WITH VERY STRONG WINDS.

* OVER EASTERN PENNSYLVANIA...MUCH OF NEW JERSEY...NORTHERN
  DELAWARE AND THE NORTHERN MARYLAND EASTERN SHORE...WIDESPREAD
  ONE TO TWO INCH RAINFALL IS FORECAST...AND UP TO THREE INCHES OF
  RAIN IS POSSIBLE WHERE ANY THUNDERSTORMS MIGHT DEVELOP. HEAVY
  RAIN IS EXPECTED TO BEGIN THIS AFTERNOON AND END BY MIDNIGHT.
  GIVEN THE SATURATED STATE OF THE GROUND...THESE AMOUNTS COULD
  RESULT IN FLOODING OF STREAMS...CREEKS AND POOR DRAINAGE AREAS
  AND COULD ALSO RESULT IN SUDDEN FLOODING OF AREAS NOT NORMALLY
  PRONE TO FLOODING. UNLIKE THE LAST COUPLE OF HEAVY RAIN
  EVENTS...THE HEAVY RAIN TODAY IS EXPECTED TO FALL IN A MORE
  CONCENTRATED PERIOD OF TIME...MUCH IF NOT ALL WITHIN SIX HOURS.
  THIS WILL CAUSE FASTER RESPONSES BY THE SMALLER CREEKS IN THE
  WATCH AREA.


  A FLASH FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR
  HEAVY RAIN ACROSS THE WATCH AREA...WHICH MAY LEAD TO FLOODING
  ALONG STREAMS...CREEKS...AREAS OF POOR DRAINAGE AND SOME AREAS
  NOT NORMALLY PRONE TO FLOODING. IF YOU ARE IN THE WATCH AREA...
  CHECK YOUR PREPAREDNESS REQUIREMENTS. KEEP INFORMED...AND BE
  READY FOR ACTION IF FLOODING IS OBSERVED OR IF A FLOOD WARNING
  IS ISSUED.


$$

TFG
000 
WGUS61 KPHI 162039
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
339 PM EST THU NOV 16 2006

DEZ001-MDZ008-NJZ001-007>010-012-013-015-017>019-PAZ054-055-
060>062-067>071-170200-
/O.EXT.KPHI.FF.A.0008.000000T0000Z-061117T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-
MIDDLESEX-WESTERN MONMOUTH-MERCER-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON...
WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE...
NEW BRUNSWICK...FREEHOLD...TRENTON...GLASSBORO...CAMDEN...
CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE...
STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON...
WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA
339 PM EST THU NOV 16 2006

...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 9 PM EST THIS EVENING...

THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR

* PORTIONS OF NORTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL 
  NEW JERSEY...NORTHERN NEW JERSEY...SOUTHERN NEW JERSEY...EAST 
  CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST 
  PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN 
  DELAWARE...NEW CASTLE IN NORTHEAST MARYLAND...CECIL IN CENTRAL 
  NEW JERSEY...MERCER AND WESTERN MONMOUTH IN NORTHERN NEW 
  JERSEY...HUNTERDON...MIDDLESEX...MORRIS...SOMERSET...SUSSEX 
  AND WARREN IN SOUTHERN NEW JERSEY...CAMDEN...GLOUCESTER AND 
  NORTHWESTERN BURLINGTON IN EAST CENTRAL PENNSYLVANIA...BERKS...
  LEHIGH AND NORTHAMPTON IN NORTHEAST PENNSYLVANIA...CARBON AND 
  MONROE IN SOUTHEAST PENNSYLVANIA...BUCKS...CHESTER...
  DELAWARE...MONTGOMERY AND PHILADELPHIA.

* UNTIL 9 PM EST THIS EVENING

* A LOW PRESSURE SYSTEM OVER THE OHIO VALLEY WILL LIFT THROUGH THE
  GREAT LAKES REGION AND INTO SOUTHEAST CANADA BY LATE TONIGHT. A
  STRONG COLD FRONT OUT WELL AHEAD OF THE LOW WILL MOVE ACROSS THE
  REGION TONIGHT. NUMEROUS SHOWERS AND POSSIBLY A FEW
  THUNDERSTORMS WILL AFFECT THE REGION THROUGH TONIGHT WITH SOME
  HEAVY RAIN AND STRONG WINDS.

* OVER EASTERN PENNSYLVANIA...MUCH OF NEW JERSEY...NORTHERN
  DELAWARE AND THE NORTHERN MARYLAND EASTERN SHORE...WIDESPREAD
  ONE TO TWO INCH RAINFALL IS FORECAST...AND UP TO THREE INCHES OF
  RAIN IS POSSIBLE WHERE ANY THUNDERSTORMS MIGHT DEVELOP. HEAVY
  RAIN IS EXPECTED TO ACROSS THE REGION DURING THE EVENING RUSH
  HOUR AND END BY MIDNIGHT. GIVEN THE SATURATED STATE OF THE
  GROUND...THESE AMOUNTS COULD RESULT IN FLOODING OF
  STREAMS...CREEKS AND POOR DRAINAGE AREAS AND COULD ALSO RESULT
  IN SUDDEN FLOODING OF AREAS NOT NORMALLY PRONE TO FLOODING.
  UNLIKE THE LAST COUPLE OF HEAVY RAIN EVENTS...THE HEAVY RAIN
  TODAY IS EXPECTED TO FALL IN A MORE CONCENTRATED PERIOD OF
  TIME...MUCH IF NOT ALL WITHIN FOUR TO SIX HOURS. THIS WILL CAUSE
  FASTER RESPONSES BY THE SMALLER CREEKS IN THE WATCH AREA.

  A FLASH FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR  
HEAVY RAIN ACROSS THE WATCH AREA...WHICH MAY LEAD TO FLOODING  
ALONG STREAMS...CREEKS...AREAS OF POOR DRAINAGE AND SOME AREAS  
NOT NORMALLY PRONE TO FLOODING. IF YOU ARE IN THE WATCH AREA...  
CHECK YOUR PREPAREDNESS REQUIREMENTS. KEEP INFORMED...AND BE  
READY FOR ACTION IF FLOODING IS OBSERVED OR IF A FLOOD WARNING  
IS ISSUED.

$$
000 
WGUS61 KPHI 170153
FFAPHI

FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
853 PM EST THU NOV 16 2006

DEZ001-MDZ008-NJZ001-007>010-012-013-015-017>019-PAZ054-055-
060>062-067>071-170300-
/O.EXP.KPHI.FF.A.0008.000000T0000Z-061117T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-
MIDDLESEX-WESTERN MONMOUTH-MERCER-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON...
WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE...
NEW BRUNSWICK...FREEHOLD...TRENTON...GLASSBORO...CAMDEN...
CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE...
STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON...
WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA
853 PM EST THU NOV 16 2006

...FLASH FLOOD WATCH WILL EXPIRE AT 9 PM EST THIS EVENING...

THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE...
NORTHEASTERN MARYLAND...NEW JERSEY...AND EASTERN PENNSYLVANIA WILL
EXPIRE AT 9:00 PM EST THIS EVENING.

ADDITIONAL HEAVY SHOWERS WILL OCCUR OVER EASTERN OCEAN AND EASTERN
MONMOUTH COUNTIES IN NEW JERSEY THROUGH 10:00 PM, BUT THESE ARE
NOT EXPECTED TO CAUSE WIDESPREAD FLOODING. THEY MAY, HOWEVER,
PRODUCE PONDING OF WATER ON ROADS, IN LOW-LYING SPOTS, AND IN
URBAN AREAS.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 15, 4:01 AM ESTDense Fog AdvisoryPHICaroline, Kent, Queen Anne's, Talbot6 hr
Nov 15, 3:06 PM ESTCoastal Flood AdvisoryPHICaroline, Cecil, Kent, Queen Anne's, Talbot26 hr

Nearby

Flash Flood Watches in New Jersey, 2006Flash Flood Watches in Pennsylvania, 2006Flash Flood Watches in Maryland, 2006Every flash flood watch in 2006

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.