Alert archive / New Jersey / Flash Flood Watches in 2007
Flash Flood Watch 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Aug 20, 2007, 3:32 PM EDT for 4 states. It took effect at Aug 21, 2007, 5:00 AM EDT. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2007, 3:32 PM EDT (19:32 UTC)
- In effect from
- Aug 21, 2007, 5:00 AM EDT
- Expired
- Aug 21, 2007, 2:47 PM EDT
- In force
- 10 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, Morris County, NJ, Salem 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), 76 km from the middle of the area, began a volume at 19:33 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, 7.5 hours before the alert went out and 125 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 464 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 251 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS61 KPHI 201932 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 332 PM EDT MON AUG 20 2007 ...A FLASH FLOOD WATCH HAS BEEN ISSUED FROM LATE TONIGHT THROUGH TUESDAY EVENING... .A VERY MOIST AIR MASS PUSHING EAST FROM THE OHIO VALLEY WILL BE LIFTED OVER A STATIONARY FRONTAL BOUNDARY TO OUR SOUTHWEST. THIS WILL PRODUCE PERIODS OF MODERATE TO AT TIMES HEAVY RAIN WITH A FEW EMBEDDED THUNDERSTORMS. DEZ001-MDZ008-NJZ001-007>010-012-015>019-PAZ054-055-060>062- 067>071-211000- /O.NEW.KPHI.FF.A.0002.070821T0900Z-070822T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-SALEM-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...TRENTON...PENNSVILLE...GLASSBORO...CAMDEN... CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA 332 PM EDT MON AUG 20 2007 ...FLASH FLOOD WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY EVENING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE... NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN NEW JERSEY...CAMDEN... GLOUCESTER...HUNTERDON...MERCER...MIDDLESEX...MORRIS... NORTHWESTERN BURLINGTON...SALEM...SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS...BUCKS...CARBON...CHESTER... DELAWARE...LEHIGH...MONROE...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * FROM LATE TONIGHT THROUGH TUESDAY EVENING * A FRONTAL BOUNDARY STALLED TO OUR SOUTHWEST WILL PROVIDE AN AVENUE FOR WEATHER DISTURBANCES TO TRACK ALONG. THIS WILL CONTINUE TO OCCUR TONIGHT AND DURING THE DAY TUESDAY IN THE FORM OF A COUPLE OF ROUNDS OF RAIN AND POSSIBLY A FEW THUNDERSTORMS. THE RAIN MAY FALL HEAVY AT TIMES TONIGHT AND ESPECIALLY DURING THE DAY TUESDAY. TIMES OF HEAVIER RAIN MAY AFFECT TUESDAY MORNINGS COMMUTE. ADDITIONAL RAINFALL AMOUNTS ARE ANTICIPATED TO BE 1 TO 2 INCHES WITH LOCALLY 3 INCHES POSSIBLE. THIS AMOUNT OF RAIN, ESPECIALLY IF IT FALLS IN A RELATIVELY SHORT PERIOD OF TIME COUPLED WITH THE RAINFALL THAT HAS ALREADY OCCURRED IN MOST AREAS, COULD CAUSE SOME FLOODING OF STREETS AND POOR DRAINAGE AREAS AND SOME SMALL STREAMS. DO NOT DRIVE THROUGH FLOODED ROADS, AS THE WATER MAY BE DEEPER THAN YOU THINK IT IS. SOME ADDITIONAL RAINFALL IS ANTICIPATED FOR WEDNESDAY. A FLASH FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR LOCALLY HEAVY RAINFALL, WHICH MAY LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. ONE WAY TO KEEP ABREAST OF EXISTING AND FORECASTED WATER CONDITIONS ON WATERWAYS THROUGHOUT THE REGION IS TO MONITOR THE ADVANCED HYDROLOGIC PREDICTION SERVICE /AHPS/ AVAILABLE ON OUR HOMEPAGE AT WWW.WEATHER.GOV/PHI. JUST CLICK THE AHPS ICON ON THE LEFT HAND MENU. $$ GORSE/EBERWINE
3 follow-up statements
000 WGUS61 KPHI 210056 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 856 PM EDT MON AUG 20 2007 ...A FLASH FLOOD WATCH HAS BEEN ISSUED FROM LATE TONIGHT THROUGH TUESDAY EVENING... .A VERY MOIST AIR MASS PUSHING EAST FROM THE OHIO VALLEY WILL BE LIFTED OVER A STATIONARY FRONTAL BOUNDARY TO OUR SOUTHWEST. THIS OVERRUNNING WILL PRODUCE PERIODS OF MODERATE TO AT TIMES HEAVY RAIN WITH A FEW EMBEDDED THUNDERSTORMS. DEZ001-MDZ008-NJZ001-007>010-012-015>019-PAZ054-055-060>062- 067>071-211100- /O.CON.KPHI.FF.A.0002.070821T0900Z-070822T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-SALEM-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...TRENTON...PENNSVILLE...GLASSBORO...CAMDEN... CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA 856 PM EDT MON AUG 20 2007 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 5 AM EDT TUESDAY THROUGH TUESDAY EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN DELAWARE...NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN NEW JERSEY...CAMDEN...GLOUCESTER...HUNTERDON...MERCER... MIDDLESEX...MORRIS...NORTHWESTERN BURLINGTON...SALEM... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH...MONROE... MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * FROM 5 AM EDT TUESDAY THROUGH TUESDAY EVENING * A FRONTAL BOUNDARY STALLED TO OUR SOUTHWEST WILL PROVIDE AN AVENUE FOR WEATHER DISTURBANCES TO TRACK ALONG. THIS WILL CONTINUE TO OCCUR TONIGHT AND DURING THE DAY TUESDAY IN THE FORM OF A COUPLE OF ROUNDS OF RAIN AND POSSIBLY A FEW THUNDERSTORMS. THE RAIN MAY FALL HEAVY AT TIMES TONIGHT AND ESPECIALLY DURING THE DAY TUESDAY. TIMES OF HEAVIER RAIN MAY AFFECT TUESDAY MORNINGS COMMUTE. ADDITIONAL RAINFALL AMOUNTS ARE ANTICIPATED TO BE 1 TO 2 INCHES WITH LOCALLY 3 INCHES POSSIBLE. THIS AMOUNT OF RAIN... ESPECIALLY IF IT FALLS IN A RELATIVELY SHORT PERIOD OF TIME COUPLED WITH THE RAINFALL THAT HAS ALREADY OCCURRED IN MOST AREAS... COULD CAUSE SOME FLOODING OF STREETS AND POOR DRAINAGE AREAS AND SOME SMALL STREAMS. DO NOT DRIVE THROUGH FLOODED ROADS... AS THE WATER MAY BE DEEPER THAN YOU THINK IT IS. SOME ADDITIONAL RAINFALL IS ANTICIPATED FOR WEDNESDAY. A FLASH FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR LOCALLY HEAVY RAINFALL... WHICH MAY LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. ONE WAY TO KEEP ABREAST OF EXISTING AND FORECASTED WATER CONDITIONS ON WATERWAYS THROUGHOUT THE REGION IS TO MONITOR THE ADVANCED HYDROLOGIC PREDICTION SERVICE /AHPS/ AVAILABLE ON OUR HOMEPAGE AT WWW.WEATHER.GOV/PHI. JUST CLICK THE AHPS ICON ON THE LEFT HAND MENU. $$ GORSE/EBERWINE/MIKETTA
000 WGUS61 KPHI 210731 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 331 AM EDT TUE AUG 21 2007 DEZ001-MDZ008-NJZ001-007>010-012-015>019-PAZ054-055-060>062- 067>071-211600- /O.CON.KPHI.FF.A.0002.070821T0900Z-070822T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-SALEM-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...TRENTON...PENNSVILLE...GLASSBORO...CAMDEN... CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA 331 AM EDT TUE AUG 21 2007 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN DELAWARE...NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN NEW JERSEY...CAMDEN...GLOUCESTER...HUNTERDON...MERCER... MIDDLESEX...MORRIS...NORTHWESTERN BURLINGTON...SALEM... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH...MONROE... MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH THIS EVENING * A FRONTAL BOUNDARY STALLED TO OUR SOUTH WILL PROVIDE AN AVENUE FOR WEATHER DISTURBANCES TO TRACK ALONG. THIS WILL CONTINUE TO THROUGH THE DAY TODAY IN THE FORM OF A COUPLE OF ROUNDS OF RAIN AND POSSIBLY A FEW THUNDERSTORMS FROM AROUND PHILADELPHIA SOUTH. THE RAIN MAY FALL HEAVY AT TIMES TODAY. TIMES OF HEAVIER RAIN WILL AFFECT THIS MORNINGS COMMUTE. ADDITIONAL RAINFALL AMOUNTS ARE ANTICIPATED TO BE 1 TO 2 INCHES WITH LOCALLY 3 INCHES POSSIBLE. THIS AMOUNT OF RAIN...ESPECIALLY IF IT FALLS IN A RELATIVELY SHORT PERIOD OF TIME COUPLED WITH THE RAINFALL THAT HAS ALREADY OCCURRED IN MOST AREAS...COULD CAUSE SOME FLOODING OF STREETS AND POOR DRAINAGE AREAS AND SOME SMALL STREAMS. DO NOT DRIVE THROUGH FLOODED ROADS...AS THE WATER MAY BE DEEPER THAN YOU THINK IT IS. AREAS THAT HAVE RECEIVED THE HEAVIEST RAIN SO FAR INCLUDE BERKS, BUCKS, MONTGOMERY AND PHILADELPHIA COUNTIES IN PENNSYLVANIA AND BURLINGTON AND CAMDEN COUNTIES IN NEW JERSEY. THE HEAVIEST RAIN WILL BE OVER BY THE EVENING COMMUTE, BUT RUNOFF PROBLEMS COULD LINGER THROUGH THE EVENING. A FLASH FLOOD WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR LOCALLY HEAVY RAINFALL... WHICH MAY LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. ONE WAY TO KEEP ABREAST OF EXISTING AND FORECASTED WATER CONDITIONS ON WATERWAYS THROUGHOUT THE REGION IS TO MONITOR THE ADVANCED HYDROLOGIC PREDICTION SERVICE /AHPS/ AVAILABLE ON OUR HOMEPAGE AT WWW.WEATHER.GOV/PHI. JUST CLICK THE AHPS ICON ON THE LEFT HAND MENU. $$ TFG
000 WGUS61 KPHI 211847 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 247 PM EDT TUE AUG 21 2007 DEZ001-MDZ008-NJZ001-007>010-012-015>019-PAZ054-055-060>062- 067>071-212000- /O.CAN.KPHI.FF.A.0002.000000T0000Z-070822T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON- CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS- DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...TRENTON...PENNSVILLE...GLASSBORO...CAMDEN... CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA 247 PM EDT TUE AUG 21 2007 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE, NORTHEAST MARYLAND, NEW JERSEY AND PENNSYLVANIA HAS BEEN CANCELLED. WHILE THERE CAN BE SOME LOCALIZED PONDING OF WATER ON ROADWAYS, THE THREAT FOR WIDESPREAD FLOODING HAS ENDED. IF LOCALIZED FLOODING DOES OCCUR, THIS WILL BE HANDLED BY AN ADVISORY OR WARNING FOR THAT SPECIFIC AREA. $$ GORSE/EBERWINE
Nearby
Flash Flood Watches in New Jersey, 2007Flash Flood Watches in Pennsylvania, 2007Flash Flood Watches in Delaware, 2007Every flash flood watch in 2007
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.