Alert archive / New Jersey / Flash Flood Watches in 2011
Flash Flood Watch 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Nov 22, 2011, 2:48 PM EST for 7 counties in New Jersey; New Castle County, Delaware; 7 counties in Pennsylvania. It took effect at Nov 22, 2011, 10:00 PM EST. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Nov 22, 2011, 2:48 PM EST (19:48 UTC)
- In effect from
- Nov 22, 2011, 10:00 PM EST
- Expired
- Nov 23, 2011, 6:34 AM EST
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties New Castle County, DE, Hunterdon County, NJ, Mercer County, NJ, Middlesex 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), 89 km from the middle of the area, began a volume at 19:50 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, 7.8 hours before the alert went out and 144 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
- 446 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 153 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
170 WGUS61 KPHI 221948 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 248 PM EST TUE NOV 22 2011 NJZ001-007>010-012-015-PAZ060>062-067>071-231100- /O.NEW.KPHI.FF.A.0010.111123T0300Z-111123T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-BERKS- LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON...READING... ALLENTOWN...BETHLEHEM...EASTON...WEST CHESTER...NORRISTOWN... DOYLESTOWN...MEDIA...PHILADELPHIA 248 PM EST TUE NOV 22 2011 ...FLASH FLOOD WATCH IN EFFECT FROM 10 PM EST THIS EVENING THROUGH WEDNESDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY... HUNTERDON...MERCER...MIDDLESEX...MORRIS...SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS...BUCKS...CHESTER... DELAWARE...LEHIGH...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * FROM 10 PM EST THIS EVENING THROUGH WEDNESDAY AFTERNOON * A COMPLEX LOW PRESSURE SYSTEM WILL MOVE FROM THE OHIO VALLEY INTO OUR REGION LATER TONIGHT AND PRODUCE A COPIOUS AMOUNT OF RAIN OVER A RATHER SHORT TIME PERIOD. RAIN WILL BE HEAVY AT TIMES TONIGHT AND EARLY WEDNESDAY MORNING AS THE SYSTEM WRAPS UP AND MOVES TO OUR NORTHEAST. WIDESPREAD RAINFALL AMOUNTS OF ONE TO THREE INCHES ARE POSSIBLE IN THE WATCH AREA THROUGH WEDNESDAY AFTERNOON WITH EVEN HIGHER AMOUNTS FROM ISOLATED THUNDERSTORMS. * IMPACTS FROM FLOODING WILL INCLUDE...SMALL STREAM, POOR DRAINAGE, URBAN AREA, BASEMENT, AND ROADWAY FLOODING. THE LARGER RIVERS SHOULD BE ABLE TO TAKE THE EXCESSIVE RAINFALL AMOUNTS BUT THEY MAY RUN HIGH AND A FEW MAY POSSIBLY APPROACH FLOOD STAGE. 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. && $$ HEAVENER
3 follow-up statements
136 WGUS61 KPHI 230228 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 928 PM EST TUE NOV 22 2011 DEZ001-231100- /O.EXA.KPHI.FF.A.0010.111123T0300Z-111123T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE- INCLUDING THE CITY OF...WILMINGTON 928 PM EST TUE NOV 22 2011 ...FLASH FLOOD WATCH IN EFFECT THROUGH WEDNESDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE NEW CASTLE COUNTY IN DELAWARE. * THROUGH WEDNESDAY AFTERNOON * A COMPLEX LOW PRESSURE SYSTEM WILL MOVE FROM THE OHIO VALLEY INTO OUR REGION LATE TONIGHT AND PRODUCE RAINFALL TOTALS MAINLY IN THE 1.5 TO 2.5 INCH RANGE. THE RAIN WILL BE HEAVY AT TIMES OVERNIGHT AND ON WEDNESDAY MORNING AS THE SYSTEM WRAPS UP AND MOVES TO OUR NORTHEAST. * IMPACTS WILL INCLUDE SMALL STREAM, POOR DRAINAGE, URBAN AREA, BASEMENT AND ROADWAY FLOODING. THE MAIN STEM RIVERS SHOULD BE ABLE TO TAKE THE EXCESSIVE RAINFALL WITHOUT FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. YOU SHOULD MONITOR THE FORECAST AND BE PREPARED TO TAKE ACTION IF A FLASH FLOOD WARNING IS ISSUED. && $$ NJZ001-007>010-012-015-PAZ060>062-067>071-231100- /O.CON.KPHI.FF.A.0010.111123T0300Z-111123T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-BERKS- LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON...READING... ALLENTOWN...BETHLEHEM...EASTON...WEST CHESTER...NORRISTOWN... DOYLESTOWN...MEDIA...PHILADELPHIA 928 PM EST TUE NOV 22 2011 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH WEDNESDAY AFTERNOON... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING COUNTIES...IN NEW JERSEY...HUNTERDON...MERCER... MIDDLESEX...MORRIS...SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS...BUCKS...CHESTER...DELAWARE...LEHIGH... MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH WEDNESDAY AFTERNOON * A COMPLEX LOW PRESSURE SYSTEM WILL MOVE FROM THE OHIO VALLEY INTO OUR REGION LATE TONIGHT AND PRODUCE RAINFALL TOTALS MAINLY IN THE 1.5 TO 2.5 INCH RANGE. THE RAIN WILL BE HEAVY AT TIMES OVERNIGHT AND ON WEDNESDAY MORNING AS THE SYSTEM WRAPS UP AND MOVES TO OUR NORTHEAST. * IMPACTS WILL INCLUDE SMALL STREAM, POOR DRAINAGE, URBAN AREA, BASEMENT AND ROADWAY FLOODING. THE MAIN STEM RIVERS SHOULD BE ABLE TO TAKE THE EXCESSIVE RAINFALL WITHOUT FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. YOU SHOULD MONITOR THE FORECAST AND BE PREPARED TO TAKE ACTION IF A FLASH FLOOD WARNING IS ISSUED. && $$
007 WGUS61 KPHI 230813 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 313 AM EST WED NOV 23 2011 PAZ054-055-231800- /O.EXA.KPHI.FF.A.0010.000000T0000Z-111123T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CARBON-MONROE- INCLUDING THE CITIES OF...JIM THORPE...STROUDSBURG 313 AM EST WED NOV 23 2011 ...FLASH FLOOD WATCH IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE A PORTION OF NORTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...CARBON AND MONROE. * UNTIL 1 PM EST THIS AFTERNOON * UP TO 2 INCHES OF RAIN HAS FALLEN ACROSS THE REGION THROUGH EARLY THIS MORNING. ADDITIONAL HEAVY RAIN THIS MORNING COULD RESULT IN FLOODING OF CREEKS AND STREAMS ACROSS THE REGION. * IMPACTS WILL INCLUDE SMALL STREAM... POOR DRAINAGE... URBAN AREA... BASEMENT AND ROADWAY FLOODING. THE MAIN STEM RIVERS SHOULD BE ABLE TO TAKE THE EXCESSIVE RAINFALL WITHOUT FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. YOU SHOULD MONITOR THE FORECAST AND BE PREPARED TO TAKE ACTION IF A FLASH FLOOD WARNING IS ISSUED. && $$ DEZ001-NJZ001-007>010-012-015-PAZ060>062-067>071-231800- /O.CON.KPHI.FF.A.0010.000000T0000Z-111123T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- MERCER-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...NEWTON...WASHINGTON... MORRISTOWN...FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON... READING...ALLENTOWN...BETHLEHEM...EASTON...WEST CHESTER... NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 313 AM EST WED NOV 23 2011 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND PENNSYLVANIA... INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NEW JERSEY...HUNTERDON...MERCER...MIDDLESEX... MORRIS...SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA... BERKS...BUCKS...CHESTER...DELAWARE...LEHIGH...MONTGOMERY... NORTHAMPTON AND PHILADELPHIA. * UNTIL 1 PM EST THIS AFTERNOON * BETWEEN 1 AND 2 INCHES OF RAIN HAS FALLEN ACROSS THE REGION THIS MORNING...AND THIS HAS RESULTED IN FLOODING OF SMALL RIVERS AND STREAMS. ADDITIONAL HEAVY RAIN THIS MORNING COULD RESULT IN MORE FLOODING PROBLEMS. * IMPACTS WILL INCLUDE SMALL STREAM... POOR DRAINAGE... URBAN AREA... BASEMENT AND ROADWAY FLOODING. THE MAIN STEM RIVERS SHOULD BE ABLE TO TAKE THE EXCESSIVE RAINFALL WITHOUT FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. YOU SHOULD MONITOR THE FORECAST AND BE PREPARED TO TAKE ACTION IF A FLASH FLOOD WARNING IS ISSUED. && $$
606 WGUS61 KPHI 231134 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 634 AM EST WED NOV 23 2011 DEZ001-NJZ001-007>010-012-015-PAZ054-055-060>062-067>071-231245- /O.CAN.KPHI.FF.A.0010.000000T0000Z-111123T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- MERCER-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY- BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...NEWTON...WASHINGTON... MORRISTOWN...FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON... JIM THORPE...STROUDSBURG...READING...ALLENTOWN...BETHLEHEM... EASTON...WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA... PHILADELPHIA 631 AM EST WED NOV 23 2011 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND PENNSYLVANIA HAS BEEN CANCELLED. WHILE SHOWERS WILL CONTINUE THIS MORNING...THE THREAT FOR ADDITIONAL WIDESPREAD HEAVY RAIN HAS PAST. FLOODING IS OCCURRING IN SOME PLACES...AND RUNOFF WILL CONTINUE THIS MORNING. MONITOR THE LATEST STATEMENTS AND WARNINGS CONCERNING THE ONGOING FLOODING. $$ HAYES
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 1:43 AM EST | Coastal Flood Statement | PHI | Atlantic, Burlington, Middlesex, Monmouth, Ocean | 4 hr |
| Nov 22, 11:20 AM EST | Gale Watch | PHI | 10 hr | |
| Nov 22, 2:45 PM EST | Coastal Flood Statement | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more | 7 hr |
| Nov 22, 5:54 PM EST | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 6 hr |
Nearby
Flash Flood Watches in New Jersey, 2011Flash Flood Watches in Pennsylvania, 2011Flash Flood Watches in Delaware, 2011Every flash flood watch in 2011
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.