Alert archive / New Jersey / Flash Flood Watches in 2013
Flash Flood Watch 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jan 29, 2013, 2:51 PM EST for 4 states. It took effect at Jan 30, 2013, 4:00 PM EST. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Jan 29, 2013, 2:51 PM EST (19:51 UTC)
- In effect from
- Jan 30, 2013, 4:00 PM EST
- Expired
- Jan 31, 2013, 6:00 AM EST
- In force
- 14 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
All 24 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, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery 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 19:49 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, 7.9 hours before the alert went out and 124 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
- 676 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
580 WGUS61 KPHI 291951 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 251 PM EST TUE JAN 29 2013 DEZ001-MDZ008-NJZ001-007>010-012>019-PAZ054-055-060>062-070-071- 101>106-301100- /O.NEW.KPHI.FF.A.0001.130130T2100Z-130131T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM- GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-CARBON-MONROE-BERKS- LEHIGH-NORTHAMPTON-DELAWARE-PHILADELPHIA-WESTERN CHESTER- EASTERN CHESTER-WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS- LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...FREEHOLD...SANDY HOOK...TRENTON...PENNSVILLE... GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY... JIM THORPE...STROUDSBURG...READING...ALLENTOWN...BETHLEHEM... EASTON...MEDIA...PHILADELPHIA...HONEY BROOK...OXFORD... WEST CHESTER...KENNET SQUARE...COLLEGEVILLE...POTTSTOWN... NORRISTOWN...LANSDALE...CHALFONT...PERKASIE...MORRISVILLE... DOYLESTOWN 251 PM EST TUE JAN 29 2013 ...FLASH FLOOD WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY MORNING... 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...EASTERN MONMOUTH...GLOUCESTER...HUNTERDON...MERCER...MIDDLESEX... MORRIS...NORTHWESTERN BURLINGTON...SALEM...SOMERSET...SUSSEX... WARREN AND WESTERN MONMOUTH. IN PENNSYLVANIA...BERKS... CARBON...DELAWARE...EASTERN CHESTER...EASTERN MONTGOMERY... LEHIGH...LOWER BUCKS...MONROE...NORTHAMPTON...PHILADELPHIA... UPPER BUCKS...WESTERN CHESTER AND WESTERN MONTGOMERY. * FROM WEDNESDAY AFTERNOON THROUGH THURSDAY MORNING * A SLOW-MOVING AND POTENT COLD FRONT WILL TAP THE GULF OF MEXICO, AND IT IS FORECAST TO GENERATE RAINFALL AMOUNTS OF BETWEEN ONE AND TWO AND ONE-HALF INCHES. LOCALLY HIGHER AMOUNTS ARE POSSIBLE IN PROLONGED AND HEAVY DOWNPOURS. MOREOVER, THUNDERSTORMS MAY DEVELOP. * PROLONGED AND HEAVY DOWNPOURS WOULD CAUSE FLASH FLOODING IN SOME LOCATIONS. ROAD FLOODING IS LIKELY. SINCE THE GROUND IS FROZEN JUST BELOW THE SURFACE AND PLANTS ARE TAKING IN VERY LITTLE WATER, HEAVY RAINFALL WILL NOT BE ABSORBED. ANY LINGERING SNOW ON THE GROUND NORTHWEST OF PHILADELPHIA WOULD MELT AND EXACERBATE RUNOFF. * FLOODING OF SMALLER AND MORE FLASHY CREEKS AND STREAMS ALSO IS POSSIBLE. MAJOR RIVER FLOODING IS NOT LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT 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. && $$ MPD
4 follow-up statements
008 WGUS61 KPHI 300927 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 427 AM EST WED JAN 30 2013 NJZ013-014-016>019-301030- /O.CAN.KPHI.FF.A.0001.130130T2100Z-130131T1200Z/ /00000.0.IC.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WESTERN MONMOUTH-EASTERN MONMOUTH-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON- INCLUDING THE CITIES OF...FREEHOLD...SANDY HOOK...PENNSVILLE... GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY 427 AM EST WED JAN 30 2013 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY HAS BEEN CANCELLED. SCATTERED BRIEFLY HEAVY SHOWERS SHOULD RACE NORTHEASTWARD THROUGH SOUTHERN AND CENTRAL NEW JERSEY THIS EVENING. THEN A SQUALL LINE IS EXPECTED TO MOVE EAST JUST AHEAD OF A COLD FRONT LATER TONIGHT. THE RESULTANT RAINFALL SHOULD BE LESS THAN AN INCH AND WHILE IT WILL CAUSE BRIEF POOR DRAINAGE STREET FLOODING AND FORCE SLOWER TRAVEL...FLASH FLOODING OF SMALL STREAMS IS NOT EXPECTED. $$ DEZ001-MDZ008-NJZ001-007>010-012-015-PAZ054-055-060>062-070-071- 101>106-302130- /O.EXT.KPHI.FF.A.0001.130130T2300Z-130131T1100Z/ /00000.0.IC.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-DELAWARE- PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-WESTERN MONTGOMERY- EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...TRENTON...JIM THORPE...STROUDSBURG...READING... ALLENTOWN...BETHLEHEM...EASTON...MEDIA...PHILADELPHIA... HONEY BROOK...OXFORD...WEST CHESTER...KENNET SQUARE... COLLEGEVILLE...POTTSTOWN...NORRISTOWN...LANSDALE...CHALFONT... PERKASIE...MORRISVILLE...DOYLESTOWN 427 AM EST WED JAN 30 2013 ...FLASH FLOOD WATCH NOW IN EFFECT FROM THIS EVENING THROUGH LATE TONIGHT... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF NORTHERN DELAWARE...NORTHEAST MARYLAND...NORTHWEST NEW JERSEY AND MUCH OF EASTERN PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN NEW JERSEY...HUNTERDON...MERCER...MIDDLESEX...MORRIS... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... CARBON...DELAWARE...EASTERN CHESTER...EASTERN MONTGOMERY... LEHIGH...LOWER BUCKS...MONROE...NORTHAMPTON...PHILADELPHIA... UPPER BUCKS...WESTERN CHESTER AND WESTERN MONTGOMERY. * FROM THIS EVENING THROUGH LATE TONIGHT * A POWERFUL STORM DEVELOPING IN THE GREAT LAKES REGION THIS AFTERNOON WILL PRODUCE SCATTERED HEAVY BUT FAST MOVING SHOWERS IN OUR AREA TONIGHT. A SUBSTANTIAL SQUALL LINE WILL PROBABLY CROSS THE AREA BETWEEN 10 PM AND 2 AM AND THUNDERSTORMS MAY BE EMBEDDED IN THIS LINE. * ANY PROLONGED HEAVY DOWNPOURS WOULD CAUSE FLASH FLOODING IN SOME LOCATIONS. FROZEN GROUND IN NORTHEAST PENNSYLVANIA AND NORTHWEST NEW JERSEY AND THE POTENTIAL FOR ICE JAMS ADDS TO THE FLASH FLOOD POTENTIAL...AS DOES SOME REMAINING SNOW MELT. POOR DRAINAGE ROAD FLOODING IS LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT 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. && $$ DRAG
290 WGUS61 KPHI 301955 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 255 PM EST WED JAN 30 2013 DEZ001-MDZ008-NJZ001-007>010-012-015-PAZ054-055-060>062-070-071- 101>106-311100- /O.CON.KPHI.FF.A.0001.130130T2300Z-130131T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-DELAWARE- PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-WESTERN MONTGOMERY- EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...TRENTON...JIM THORPE...STROUDSBURG...READING... ALLENTOWN...BETHLEHEM...EASTON...MEDIA...PHILADELPHIA... HONEY BROOK...OXFORD...WEST CHESTER...KENNET SQUARE... COLLEGEVILLE...POTTSTOWN...NORRISTOWN...LANSDALE...CHALFONT... PERKASIE...MORRISVILLE...DOYLESTOWN 255 PM EST WED JAN 30 2013 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 6 PM EST THIS EVENING THROUGH LATE TONIGHT... 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...HUNTERDON...MERCER...MIDDLESEX...MORRIS... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... CARBON...DELAWARE...EASTERN CHESTER...EASTERN MONTGOMERY... LEHIGH...LOWER BUCKS...MONROE...NORTHAMPTON...PHILADELPHIA... UPPER BUCKS...WESTERN CHESTER AND WESTERN MONTGOMERY. * FROM 6 PM EST THIS EVENING THROUGH LATE TONIGHT * SCATTERED HEAVY BUT FAST MOVING SHOWERS AREA EXPECTED IN OUR AREA TONIGHT. A SUBSTANTIAL SQUALL LINE WILL PROBABLY CROSS THE AREA BETWEEN 10 PM AND 2 AM AND THUNDERSTORMS MAY BE EMBEDDED IN THIS LINE. * ANY PROLONGED HEAVY DOWNPOURS WOULD CAUSE FLASH FLOODING IN SOME LOCATIONS. FROZEN GROUND IN NORTHEAST PENNSYLVANIA AND NORTHWEST NEW JERSEY AND THE POTENTIAL FOR ICE JAMS ADDS TO THE FLASH FLOOD POTENTIAL...AS DOES SOME REMAINING SNOW MELT. POOR DRAINAGE ROAD FLOODING IS LIKELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT 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. && $$
446 WGUS61 KPHI 310900 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 400 AM EST THU JAN 31 2013 DEZ001-MDZ008-NJZ001-007>010-012-015-PAZ054-055-060>062-070-071- 101>106-311100- /O.CON.KPHI.FF.A.0001.000000T0000Z-130131T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-DELAWARE- PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-WESTERN MONTGOMERY- EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...TRENTON...JIM THORPE...STROUDSBURG...READING... ALLENTOWN...BETHLEHEM...EASTON...MEDIA...PHILADELPHIA... HONEY BROOK...OXFORD...WEST CHESTER...KENNET SQUARE... COLLEGEVILLE...POTTSTOWN...NORRISTOWN...LANSDALE...CHALFONT... PERKASIE...MORRISVILLE...DOYLESTOWN 400 AM EST THU JAN 31 2013 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 6 AM EST EARLY THIS MORNING... 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...HUNTERDON...MERCER...MIDDLESEX...MORRIS... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... CARBON...DELAWARE...EASTERN CHESTER...EASTERN MONTGOMERY... LEHIGH...LOWER BUCKS...MONROE...NORTHAMPTON...PHILADELPHIA... UPPER BUCKS...WESTERN CHESTER AND WESTERN MONTGOMERY. * UNTIL 6 AM EST EARLY THIS MORNING * HEAVY FAST MOVING SHOWERS WILL END BY 6 AM. * SPOTTY FLOODING OF SMALLER CREEKS AND STREAMS WAS STILL OCCURRING IN PARTS OF EASTERN PENNSYLVANIA. THE REMAINING RUNOFF MAY CAUSE A LITTLE MORE FLOODING EVEN AFTER THE RAIN ENDS. THERE HAS BEEN CONSIDERABLE POOR DRAINAGE STREET FLOODING OVERNIGHT. * STORM TOTAL RAINFALL...OVER EAST CENTRAL AND NORTHEAST PENNSYLVANIA GENERALLY BETWEEN 1.5 AND 2.5 INCHES OCCURRED WITH AROUND 1 TO 1.5 INCHES IN NORTHWEST NEW JERSEY...SOUTHEAST PENNSYLVANIA INTO NORTHERN DELAWARE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT 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. && $$ DRAG
152 WGUS61 KPHI 311105 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 605 AM EST THU JAN 31 2013 DEZ001-MDZ008-NJZ001-007>010-012-015-PAZ054-055-060>062-070-071- 101>106-311215- /O.EXP.KPHI.FF.A.0001.000000T0000Z-130131T1100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-MERCER-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-DELAWARE- PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-WESTERN MONTGOMERY- EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...TRENTON...JIM THORPE...STROUDSBURG...READING... ALLENTOWN...BETHLEHEM...EASTON...MEDIA...PHILADELPHIA... HONEY BROOK...OXFORD...WEST CHESTER...KENNET SQUARE... COLLEGEVILLE...POTTSTOWN...NORRISTOWN...LANSDALE...CHALFONT... PERKASIE...MORRISVILLE...DOYLESTOWN 605 AM EST THU JAN 31 2013 ...FLASH FLOOD WATCH HAS EXPIRED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE... NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA HAS EXPIRED. THERE HAS BEEN CONSIDERABLE LOW LYING AREA FLOODING IN PORTIONS OF EASTERN PENNSYLVANIA...INCLUDING A FEW SMALL STREAMS. RUNOFF WILL CONTINUE THIS MORNING BUT THE HEAVY RAINS HAVE ENDED. RIVERS AND STREAMS WILL BE FAST FLOWING AND RISING TODAY. DO NOT WALK ALONG THE RIVER BANKS. $$ DRAG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 29, 3:30 AM EST | Gale Watch | PHI | 25 hr | |
| Jan 29, 2:54 PM EST | High Wind Watch | PHI | Atlantic, Burlington, Cape May, Monmouth, Ocean | 13 hr |
| Jan 29, 3:07 PM EST | Storm Watch | PHI | 13 hr |
Nearby
Flash Flood Watches in New Jersey, 2013Flash Flood Watches in Pennsylvania, 2013Flash Flood Watches in Delaware, 2013Every flash flood watch in 2013
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.