Alert archive / New Jersey / Flood Watches in 2011
Flood Watch 6, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flood watch at Apr 16, 2011, 4:07 AM EDT for 7 counties in New Jersey; 7 counties in Pennsylvania; New Castle County, Delaware. It took effect at Apr 16, 2011, 5:00 PM EDT. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Apr 16, 2011, 4:07 AM EDT (08:07 UTC)
- In effect from
- Apr 16, 2011, 5:00 PM EDT
- Expired
- Apr 17, 2011, 4:12 AM EDT
- In force
- 11 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 08:06 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 00:00Z, 8.1 hours before the alert went out and 194 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
- 1081 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -97 m²/s²
- 0-3 km storm-relative helicity
- -44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
068 WGUS61 KPHI 160807 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 407 AM EDT SAT APR 16 2011 ...A PERIOD OF INTENSE RAINFALL AHEAD OF AN EASTWARD MOVING COLD FRONT MAY CAUSE SEVERAL SMALL STREAMS TO FLOOD EARLY TONIGHT... .THE FLOOD WATCH AREA WILL PROBABLY RECEIVE 1 TO 2 INCHES OF RAIN WITHIN A 6 HOUR PERIOD...MOST OF IT BETWEEN 5 PM AND 11 PM. DEZ001-NJZ001-007>010-012-015-PAZ054-055-060>062-067>071-161630- /O.NEW.KPHI.FA.A.0006.110416T2100Z-110417T0900Z/ /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 407 AM EDT SAT APR 16 2011 ...FLOOD WATCH IN EFFECT FROM THIS AFTERNOON THROUGH LATE TONIGHT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLOOD WATCH 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...CARBON...CHESTER...DELAWARE... LEHIGH...MONROE...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * FROM THIS AFTERNOON THROUGH LATE TONIGHT * RUNOFF FROM INTENSE SHORT TERM RAIN ON ALREADY WET GROUND MAY CAUSE SEVERAL SMALL STREAMS TO FLOOD SOMETIME TONIGHT. * IF RAINFALL OF 1.5 TO 2.5 INCHES OCCURS WITHIN A 3 TO 6 HOUR PERIOD...POCKETS OF SMALL STREAM FLOODING WOULD PROBABLY OCCUR. * HEAVIEST RAIN IS FORECAST BETWEEN 5 PM AND 11 PM. * IF LATER FORECASTS RULE OUT THE CHANCE OF A 2 INCH RAINFALL WITHIN A 6 HOUR PERIOD...THIS WATCH WOULD BE DISCONTINUED. * IN THE MEANTIME...URBAN CENTERS AND AREAS THAT ARE TYPICALLY VULNERABLE TO POOR DRAINAGE STREET FLOODING SHOULD BE ALERT FOR THIS LIKELIHOOD EARLY TONIGHT. THIS INCLUDES THE NEW BRUNSWICK... TRENTON...PHILADELPHIA...WILMINGTON INTERSTATE 95 CORRIDOR. 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. && $$ DRAG
4 follow-up statements
781 WGUS61 KPHI 161425 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1025 AM EDT SAT APR 16 2011 DEZ001-NJZ001-007>010-012-015-PAZ054-055-060>062-067>071-162100- /O.CON.KPHI.FA.A.0006.110416T2100Z-110417T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- MERCER-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY- BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...NEWTON...WASHINGTON... MORRISTOWN...FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON... JIM THORPE...STROUDSBURG...READING...ALLENTOWN...BETHLEHEM... EASTON...WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA... PHILADELPHIA 1025 AM EDT SAT APR 16 2011 ...FLOOD WATCH REMAINS IN EFFECT FROM 5 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... THE FLOOD WATCH CONTINUES FOR * NEW CASTLE COUNTY IN DELAWARE, THE NEW JERSEY COUNTIES OF SUSSEX, WARREN, MORRIS, HUNTERDON, SOMERSET, MIDDLESEX AND MERCER, AND THE PENNSYLVANIA COUNTIES OF CARBON, MONROE, NORTHAMPTON, LEHIGH, BERKS, CHESTER, MONTGOMERY, BUCKS, PHILADELPHIA AND DELAWARE. * FROM 500 PM THIS AFTERNOON THROUGH LATE TONIGHT * RAINFALL TOTALS OF 1 TO 2 INCHES ARE EXPECTED. MOST OF THE RAIN IS ANTICIPATED DURING THE SIX HOUR PERIOD FROM 500 PM UNTIL 1100 PM. * THE EXPECTED RAINFALL MAY RESULT IN MINOR SMALL STREAM FLOODING, AS WELL AS FLOODING OF ROADWAYS AND IN AREAS OF POOR DRAINAGE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLOOD WATCH MEANS THAT THERE IS A POTENTIAL FOR FLOODING BASED ON THE CURRENT FORECAST. PLEASE MONITOR THE FORECAST THROUGH THE DAY AND BE ALERT FOR POSSIBLE FLOOD WARNINGS THIS EVENING OR TONIGHT. IF YOU LIVE IN AN AREA THAT IS PRONE TO FLOODING, BE PREPARED TO TAKE ACTION IN THE EVENT THAT FLOODING DEVELOPS. && $$ IOVINO
241 WGUS61 KPHI 161920 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 320 PM EDT SAT APR 16 2011 DEZ001-NJZ001-007>010-012-015-PAZ054-055-060>062-067>071-170900- /O.CON.KPHI.FA.A.0006.110416T2100Z-110417T0900Z/ /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 320 PM EDT SAT APR 16 2011 ...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... THE FLOOD WATCH CONTINUES FOR * NEW CASTLE COUNTY IN DELAWARE, THE NEW JERSEY COUNTIES OF SUSSEX, WARREN, MORRIS, HUNTERDON, SOMERSET, MIDDLESEX AND MERCER, AND THE PENNSYLVANIA COUNTIES OF CARBON, MONROE, NORTHAMPTON, LEHIGH, BERKS, CHESTER, MONTGOMERY, BUCKS, PHILADELPHIA AND DELAWARE. * THROUGH LATE TONIGHT * RAINFALL TOTALS OF 1 TO 2 INCHES ARE EXPECTED. MOST OF THE RAIN IS ANTICIPATED DURING THE SIX HOUR PERIOD FROM 600 PM UNTIL MIDNIGHT. * THE EXPECTED RAINFALL MAY RESULT IN MINOR SMALL STREAM FLOODING, AS WELL AS FLOODING OF ROADWAYS AND IN AREAS OF POOR DRAINAGE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLOOD WATCH MEANS THAT THERE IS A POTENTIAL FOR FLOODING BASED ON THE CURRENT FORECAST. PLEASE MONITOR THE FORECAST THROUGH THE DAY AND BE ALERT FOR POSSIBLE FLOOD WARNINGS THIS EVENING OR TONIGHT. IF YOU LIVE IN AN AREA THAT IS PRONE TO FLOODING, BE PREPARED TO TAKE ACTION IN THE EVENT THAT FLOODING DEVELOPS. && $$ IOVINO
640 WGUS61 KPHI 170343 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1143 PM EDT SAT APR 16 2011 DEZ001-NJZ001-007>010-012-015-PAZ054-055-060>062-067>071-170900- /O.CON.KPHI.FA.A.0006.000000T0000Z-110417T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- MERCER-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY- BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...NEWTON...WASHINGTON... MORRISTOWN...FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON... JIM THORPE...STROUDSBURG...READING...ALLENTOWN...BETHLEHEM... EASTON...WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA... PHILADELPHIA 1143 PM EDT SAT APR 16 2011 ...FLOOD WATCH REMAINS IN EFFECT UNTIL 5 AM EDT SUNDAY... THE FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND PENNSYLVANIA... INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NEW JERSEY...HUNTERDON...MERCER...MIDDLESEX... MORRIS...SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA... BERKS...BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH... MONROE...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * UNTIL 5 AM EDT SUNDAY. * RAINFALL TOTALS GENERALLY OF 2.0 TO 3.5 INCHES. * THIS RAINFALL WILL RESULT IN SMALL STREAM FLOODING, AS WELL AS FLOODING OF ROADWAYS AND IN AREAS OF POOR DRAINAGE. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE MONITOR THE FORECASTS AND FLOOD WARNINGS FOR MORE INFORMATION. IF YOU LIVE IN AN AREA THAT IS PRONE TO FLOODING, BE PREPARED TO TAKE ACTION IN THE EVENT THAT FLOODING OCCURS. && $$
611 WGUS61 KPHI 170812 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 412 AM EDT SUN APR 17 2011 DEZ001-NJZ001-007>010-012-015-PAZ054-055-060>062-067>071-170915- /O.CAN.KPHI.FA.A.0006.000000T0000Z-110417T0900Z/ /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 412 AM EDT SUN APR 17 2011 ...FLOOD WATCH IS CANCELLED... THE FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND PENNSYLVANIA HAS BEEN CANCELLED. HEAVY RAIN AND THUNDERSTORMS HAVE MOVED OUT OF THE AREA AND THE THREAT FOR FURTHER FLOODING HAS DIMINISHED. $$ MEOLA
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 3:25 AM EDT | Coastal Flood Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more | 31 hr |
| Apr 16, 6:37 PM EDT | Areal Flood Warning | PHI | Hunterdon, Warren | 8 hr |
| Apr 16, 7:47 PM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 12 hr |
| Apr 16, 6:22 PM EDT | Areal Flood Warning | PHI | Chester, Delaware, Montgomery | 12 hr |
Nearby
Flood Watches in New Jersey, 2011Flood Watches in Pennsylvania, 2011Flood Watches in Delaware, 2011Every 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.