Alert archive / New Jersey / Flood Watches in 2009
Flood Watch 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flood watch at Aug 13, 2009, 3:36 AM EDT for 4 states. It was in force for 36 min.
The area
The counties it named.
The facts
- Issued
- Aug 13, 2009, 3:36 AM EDT (07:36 UTC)
- Expired
- Aug 13, 2009, 4:12 AM EDT
- In force
- 36 min
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
All 31 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, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean 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), 67 km from the middle of the area, began a volume at 07:38 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 7.6 hours before the alert went out and 219 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
- 626 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1194 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -34 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS61 KPHI 130736 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 336 AM EDT THU AUG 13 2009 DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054- 055-060>062-067>071-140400- /O.NEW.KPHI.FA.A.0005.090813T0736Z-090814T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON- SOMERSET-MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM- GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND- ATLANTIC-CAPE MAY-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- COASTAL OCEAN-SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH- NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... REHOBOTH BEACH...ELKTON...CHESTERTOWN...CENTREVILLE...EASTON... DENTON...NEWTON...WASHINGTON...MORRISTOWN...FLEMINGTON... SOMERVILLE...NEW BRUNSWICK...FREEHOLD...SANDY HOOK...TRENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...OCEAN CITY...ATLANTIC CITY... LONG BEACH ISLAND...WHARTON STATE FOREST...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...WEST CHESTER... NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 336 AM EDT THU AUG 13 2009 ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLOOD WATCH FOR PORTIONS OF DELAWARE...NORTHEAST MARYLAND... NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS... IN DELAWARE...DELAWARE BEACHES...INLAND SUSSEX...KENT AND NEW CASTLE. IN NORTHEAST MARYLAND...CAROLINE...CECIL...KENT MD... QUEEN ANNES AND TALBOT. IN NEW JERSEY...ATLANTIC...ATLANTIC COASTAL CAPE MAY...CAMDEN...CAPE MAY...COASTAL ATLANTIC... COASTAL OCEAN...CUMBERLAND...EASTERN MONMOUTH...GLOUCESTER... HUNTERDON...MERCER...MIDDLESEX...MORRIS...NORTHWESTERN BURLINGTON...OCEAN...SALEM...SOMERSET...SOUTHEASTERN BURLINGTON...SUSSEX...WARREN AND WESTERN MONMOUTH. IN PENNSYLVANIA...BERKS...BUCKS...CARBON...CHESTER...DELAWARE... LEHIGH...MONROE...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH THIS EVENING * A SLOW MOVING UPPER LEVEL DISTURBANCE, COMBINED WITH A MOIST UNSTABLE AIRMASS WILL ONCE AGAIN CONTRIBUTE TO SHOWERS AND THUNDERSTORMS AGAIN TODAY. SOME OF THESE SHOWERS AND THUNDERSTORMS COULD CONTAIN HEAVY RAINFALL, AND WITH WET GROUNDS FROM YESTERDAYS RAINFALL, SOME FLASH FLOODING IS POSSIBLE AGAIN TODAY. THE UPPER LEVEL DISTURBANCE SHOULD BEGIN TO MOVE OUT LATER TONIGHT, AND PRECIPITATION SHOULD BEGIN TO DISSIPATE SOON AFTER SUNDOWN. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON CURRENT FORECASTS. YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP. && $$ ROBERTSON
1 follow-up statement
000 WGUS61 KPHI 130812 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 412 AM EDT THU AUG 13 2009 DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054- 055-060>062-067>071-140400- /O.CAN.KPHI.FA.A.0005.000000T0000Z-090814T0400Z/ /O.NEW.KPHI.FF.A.0009.090813T0812Z-090814T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD- QUEEN ANNES-TALBOT-CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON- SOMERSET-MIDDLESEX-WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM- GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND- ATLANTIC-CAPE MAY-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- COASTAL OCEAN-SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH- NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...DOVER...GEORGETOWN... REHOBOTH BEACH...ELKTON...CHESTERTOWN...CENTREVILLE...EASTON... DENTON...NEWTON...WASHINGTON...MORRISTOWN...FLEMINGTON... SOMERVILLE...NEW BRUNSWICK...FREEHOLD...SANDY HOOK...TRENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...JACKSON...MILLVILLE...HAMMONTON... CAPE MAY COURT HOUSE...OCEAN CITY...ATLANTIC CITY... LONG BEACH ISLAND...WHARTON STATE FOREST...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...WEST CHESTER... NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 412 AM EDT THU AUG 13 2009 ...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF DELAWARE...NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN DELAWARE...DELAWARE BEACHES...INLAND SUSSEX...KENT AND NEW CASTLE. IN NORTHEAST MARYLAND... CAROLINE...CECIL...KENT MD...QUEEN ANNES AND TALBOT. IN NEW JERSEY...ATLANTIC...ATLANTIC COASTAL CAPE MAY...CAMDEN...CAPE MAY...COASTAL ATLANTIC...COASTAL OCEAN...CUMBERLAND...EASTERN MONMOUTH...GLOUCESTER...HUNTERDON...MERCER...MIDDLESEX... MORRIS...NORTHWESTERN BURLINGTON...OCEAN...SALEM...SOMERSET... SOUTHEASTERN BURLINGTON...SUSSEX...WARREN AND WESTERN MONMOUTH. IN PENNSYLVANIA...BERKS...BUCKS...CARBON...CHESTER... DELAWARE...LEHIGH...MONROE...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH THIS EVENING * A SLOW MOVING UPPER LEVEL DISTURBANCE... COMBINED WITH A MOIST UNSTABLE AIRMASS WILL ONCE AGAIN CONTRIBUTE TO SHOWERS AND THUNDERSTORMS AGAIN TODAY. SOME OF THESE SHOWERS AND THUNDERSTORMS COULD CONTAIN HEAVY RAINFALL... AND WITH WET GROUNDS FROM YESTERDAYS RAINFALL... SOME FLASH FLOODING IS POSSIBLE AGAIN TODAY. THE UPPER LEVEL DISTURBANCE SHOULD BEGIN TO MOVE OUT LATER TONIGHT... AND PRECIPITATION SHOULD BEGIN TO DISSIPATE SOON AFTER SUNDOWN. 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. && $$ ROBERTSON
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 8:54 PM EDT | Flash Flood Warning | PHI | Carbon | 4 hr |
| Aug 12, 10:33 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Northampton | 4 hr |
| Aug 12, 10:42 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Aug 12, 11:23 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh, Northampton | 7 hr |
| Aug 13, 2:58 AM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
| Aug 13, 4:12 AM EDT | Flash Flood Watch | PHI | Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more | 15 hr |
| Aug 13, 6:01 AM EDT | River Flood Warning | PHI | Chester | 5 hr |
| Aug 13, 9:13 AM EDT | River Flood Warning | PHI | Chester, Delaware | 5 hr |
| Aug 12, 9:12 PM EDT | Special Marine Warning | PHI | 28 min |
Nearby
Flood Watches in New Jersey, 2009Flood Watches in Pennsylvania, 2009Flood Watches in Maryland, 2009Every flood watch in 2009
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.