Alert archive / Pennsylvania / Flash Flood Watches in 2014
Flash Flood Watch 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jan 8, 2014, 10:21 AM EST for Bucks County, Philadelphia County, Pennsylvania; Burlington County, Mercer County, New Jersey. It was in force for 41 hr.
The area
The counties it named.
The facts
- Issued
- Jan 8, 2014, 10:21 AM EST (15:21 UTC)
- Expired
- Jan 10, 2014, 3:17 AM EST
- In force
- 41 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties Burlington County, NJ, Mercer County, NJ, Bucks County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 46 km from the middle of the area, began a volume at 15:18 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, 3.4 hours before the alert went out and 126 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
- 1559 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
568 WGUS61 KPHI 081521 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1021 AM EST WED JAN 8 2014 NJZ015-019-PAZ071-106-082330- /O.NEW.KPHI.FF.A.0001.140108T1521Z-140109T1100Z/ /00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MERCER-NORTHWESTERN BURLINGTON-PHILADELPHIA-LOWER BUCKS- INCLUDING THE CITIES OF...TRENTON...MOORESTOWN...MOUNT HOLLY... PHILADELPHIA...MORRISVILLE...DOYLESTOWN 1021 AM EST WED JAN 8 2014 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT FOR AREAS ADJACENT TO THE DELAWARE RIVER DUE TO AN ICE JAM... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NEW JERSEY AND SOUTHEAST PENNSYLVANIA...ADJACENT TO THE DELAWARE RIVER...INCLUDING MERCER AND NORTHWESTERN BURLINGTON COUNTIES IN NEW JERSEY...AND LOWER BUCKS AND PHILADELPHIA COUNTIES IN PENNSYLVANIA. * THROUGH LATE TONIGHT * AN ICE JAM HAS DEVELOPED ON THE DELAWARE RIVER NEAR TRENTON. THIS HAS RESULTED IN A FEW MILES OF NEAR BANK FULL CONDITIONS NORTH OF THE ICE JAM. WHEN THIS ICE JAM BREAKS...THERE MAY BE ENOUGH WATER BEHIND THE JAM TO CAUSE FLASH FLOODING DOWNSTREAM. * TEMPERATURES ARE EXPECTED TO REMAIN BELOW FREEZING TODAY AND TONIGHT...SO THE ICE JAM MAY NOT BREAK UNTIL TOMORROW MORNING. * THOUGH IT IS NOT POSSIBLE AT THIS TIME TO DETERMINE HOW HIGH THE WATER LEVELS WILL RISE ONCE THE ICE JAM BREAKS...THERE IS A RISK FOR FLASH FLOODING. * NAVIGATION AND INFRASTRUCTURE, SUCH AS DOCKS, COULD BE AFFECTED BY THE RELEASE. 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. && $$ JOHNSON
5 follow-up statements
299 WGUS61 KPHI 082245 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 545 PM EST WED JAN 8 2014 NJZ015-019-PAZ071-106-091100- /O.CON.KPHI.FF.A.0001.000000T0000Z-140109T1100Z/ /00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MERCER-NORTHWESTERN BURLINGTON-PHILADELPHIA-LOWER BUCKS- INCLUDING THE CITIES OF...TRENTON...MOORESTOWN...MOUNT HOLLY... PHILADELPHIA...MORRISVILLE...DOYLESTOWN 545 PM EST WED JAN 8 2014 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NEW JERSEY AND SOUTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY...MERCER AND NORTHWESTERN BURLINGTON. IN SOUTHEAST PENNSYLVANIA...LOWER BUCKS AND PHILADELPHIA. * THROUGH LATE TONIGHT * AN ICE JAM CONTINUES ON THE DELAWARE RIVER NEAR TRENTON. THIS HAS RESULTED IN FLOODING UPSTREAM TO THE NORTH OF THE ICE JAM. WHEN THIS ICE JAM BREAKS...THERE MAY BE ENOUGH WATER BEHIND THE JAM TO CAUSE FLASH FLOODING DOWNSTREAM. * TEMPERATURES ARE EXPECTED TO REMAIN BELOW FREEZING THROUGH THURSDAY MORNING. THEREFORE...THE ICE JAM MAY NOT BREAK UNTIL LATER THURSDAY...AT THE EARLIEST. * OUTLOOK...THIS FLASH FLOOD WATCH MAY NEED EXTENSION THROUGH AT LEAST THE DAYLIGHT HOURS THURSDAY IF THE ICE JAM IS STILL CAUSING FLOODING AT 6 AM THURSDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$
844 WGUS61 KPHI 090923 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 423 AM EST THU JAN 9 2014 NJZ015-019-PAZ071-106-100300- /O.EXT.KPHI.FF.A.0001.000000T0000Z-140110T0300Z/ /00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MERCER-NORTHWESTERN BURLINGTON-PHILADELPHIA-LOWER BUCKS- INCLUDING THE CITIES OF...TRENTON...MOORESTOWN...MOUNT HOLLY... PHILADELPHIA...MORRISVILLE...DOYLESTOWN 423 AM EST THU JAN 9 2014 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF NEW JERSEY AND SOUTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY...MERCER AND NORTHWESTERN BURLINGTON. IN SOUTHEAST PENNSYLVANIA...LOWER BUCKS AND PHILADELPHIA. * THROUGH THIS EVENING * AN ICE JAM CONTINUES ON THE DELAWARE RIVER NEAR TRENTON. THIS HAS RESULTED IN FLOODING UPSTREAM TO THE NORTH OF THE ICE JAM. WHEN THIS ICE JAM BREAKS...THERE MAY BE ENOUGH WATER BEHIND THE JAM TO CAUSE FLASH FLOODING DOWNSTREAM. * TEMPERATURES ARE EXPECTED TO REMAIN BELOW FREEZING THROUGH THIS MORNING. THEREFORE...THE ICE JAM MAY NOT BREAK UNTIL LATER TODAY... AT THE EARLIEST. 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. PLEASE EVACUATE IF TOLD TO DO SO BY EMERGENCY RESPONDERS. && $$
596 WGUS61 KPHI 091719 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1219 PM EST THU JAN 9 2014 NJZ015-019-PAZ071-106-100130- /O.EXT.KPHI.FF.A.0001.000000T0000Z-140110T1300Z/ /00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MERCER-NORTHWESTERN BURLINGTON-PHILADELPHIA-LOWER BUCKS- INCLUDING THE CITIES OF...TRENTON...MOORESTOWN...MOUNT HOLLY... PHILADELPHIA...MORRISVILLE...DOYLESTOWN 1219 PM EST THU JAN 9 2014 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH FRIDAY MORNING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF NEW JERSEY AND SOUTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY...MERCER AND NORTHWESTERN BURLINGTON. IN SOUTHEAST PENNSYLVANIA...LOWER BUCKS AND PHILADELPHIA. * THROUGH FRIDAY MORNING * AN ICE JAM CONTINUES ON THE DELAWARE RIVER NEAR TRENTON. THIS HAS RESULTED IN FLOODING UPSTREAM TO THE NORTH OF THE ICE JAM. WHEN THIS ICE JAM BREAKS, THERE MAY BE ENOUGH WATER BEHIND THE JAM TO CAUSE FLASH FLOODING DOWNSTREAM. * ICE JAMS ARE UNPREDICTABLE, BUT AS TEMPERATURES WARM, ARE MORE LIKELY TO BREAK UP. HIGH TEMPERATURES THIS AFTERNOON WILL BE NEAR FREEZING. HIGH ON FRIDAY WILL BE IN THE LOWER 40S AND HIGHS ON SATURDAY WILL BE NEAR 60. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. PLEASE EVACUATE IF TOLD TO DO SO BY EMERGENCY RESPONDERS. && $$ KRUZDLO
224 WGUS61 KPHI 100045 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 745 PM EST THU JAN 9 2014 NJZ015-019-PAZ071-106-101300- /O.CON.KPHI.FF.A.0001.000000T0000Z-140110T1300Z/ /00000.0.IJ.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MERCER-NORTHWESTERN BURLINGTON-PHILADELPHIA-LOWER BUCKS- INCLUDING THE CITIES OF...TRENTON...MOORESTOWN...MOUNT HOLLY... PHILADELPHIA...MORRISVILLE...DOYLESTOWN 745 PM EST THU JAN 9 2014 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NEW JERSEY AND SOUTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY...MERCER AND NORTHWESTERN BURLINGTON COUNTIES. IN SOUTHEAST PENNSYLVANIA...LOWER BUCKS AND PHILADELPHIA COUNTIES. * THROUGH FRIDAY MORNING * AN ICE JAM CONTINUES ON THE DELAWARE RIVER NEAR TRENTON. THIS HAS RESULTED IN FLOODING UPSTREAM TO THE NORTH OF THE ICE JAM. WHEN THIS ICE JAM BREAKS... THERE MAY BE ENOUGH WATER BEHIND THE JAM TO CAUSE FLASH FLOODING DOWNSTREAM. * ICE JAMS ARE UNPREDICTABLE... BUT AS TEMPERATURES WARM... ARE MORE LIKELY TO BREAK UP. HIGH TEMPERATURES ON FRIDAY WILL BE IN THE LOWER 40S AND HIGHS ON SATURDAY WILL BE NEAR 60. 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. PLEASE EVACUATE IF TOLD TO DO SO BY EMERGENCY RESPONDERS. && $$
893 WGUS61 KPHI 100817 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 317 AM EST FRI JAN 10 2014 NJZ015-019-PAZ071-106-102200- /O.CAN.KPHI.FF.A.0001.000000T0000Z-140110T1300Z/ /O.NEW.KPHI.FA.A.0001.140111T1600Z-140112T1100Z/ /00000.0.IC.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MERCER-NORTHWESTERN BURLINGTON-PHILADELPHIA-LOWER BUCKS- INCLUDING THE CITIES OF...TRENTON...MOORESTOWN...MOUNT HOLLY... PHILADELPHIA...MORRISVILLE...DOYLESTOWN 317 AM EST FRI JAN 10 2014 ...FLOOD WATCH IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLOOD WATCH FOR PORTIONS OF NEW JERSEY AND SOUTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY... MERCER AND NORTHWESTERN BURLINGTON. IN SOUTHEAST PENNSYLVANIA...LOWER BUCKS AND PHILADELPHIA. * FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT * THE ICE JAM ALONG THE DELAWARE RIVER IN TRENTON HAS WEAKENED. UPSTREAM WATER LEVELS HAVE BEEN STEADILY DROPPING AND CLOSED ROADWAYS HAVE REOPENED. PLEASE LOOK FOR UPDATES AS THE JAM MIGHT STRENGTHEN AGAIN BEFORE TEMPERATURES RISE ABOVE FREEZING LATER TODAY. * ON SATURDAY RAIN, HEAVY AT TIMES, ALONG WITH THE CHANCE OF THUNDERSTORMS IS EXPECTED. EVENT PRECIPITATION TOTALS ARE EXPECTED TO AVERAGE 1.5 AND 2.0 INCHES. THE COMBINATION OF ICE JAMS AND HEAVY RAIN RUNOFF COULD LEAD TO FLOODING OF CREEKS AND RIVERS IN THE AREA. * EXPECT POOR DRAINAGE FLOODING TO IMPACT TRAVEL ON SATURDAY. FLOODING ON CREEKS AND RIVER MIGHT LAST INTO SUNDAY IF HEAVY RAIN OCCURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON CURRENT FORECASTS. YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP. && $$ DEZ001-MDZ008-NJZ001-007>010-012-013-016>018-PAZ054-055-060>062- 070-101>105-102200- /O.NEW.KPHI.FA.A.0001.140111T1600Z-140112T1100Z/ /00000.0.IC.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET- MIDDLESEX-WESTERN MONMOUTH-SALEM-GLOUCESTER-CAMDEN-CARBON-MONROE- BERKS-LEHIGH-NORTHAMPTON-DELAWARE-WESTERN CHESTER-EASTERN CHESTER- WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEWTON... WASHINGTON...MORRISTOWN...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...FREEHOLD...PENNSVILLE...GLASSBORO...CAMDEN... CHERRY HILL...JIM THORPE...STROUDSBURG...READING...ALLENTOWN... BETHLEHEM...EASTON...MEDIA...HONEY BROOK...OXFORD... WEST CHESTER...KENNET SQUARE...COLLEGEVILLE...POTTSTOWN... NORRISTOWN...LANSDALE...CHALFONT...PERKASIE 317 AM EST FRI JAN 10 2014 ...FLOOD WATCH IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * 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...MIDDLESEX...MORRIS...SALEM... SOMERSET...SUSSEX...WARREN AND WESTERN MONMOUTH. IN PENNSYLVANIA...BERKS...CARBON...DELAWARE...EASTERN CHESTER... EASTERN MONTGOMERY...LEHIGH...MONROE...NORTHAMPTON...UPPER BUCKS...WESTERN CHESTER AND WESTERN MONTGOMERY. * FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT * ON SATURDAY RAIN, HEAVY AT TIMES, ALONG WITH THE CHANCE OF THUNDERSTORMS. EVENT PRECIPITATION TOTALS ARE EXPECTED TO AVERAGE 1.5 AND 2.0 INCHES. THE COMBINATION OF ICE JAMS AND HEAVY RAIN RUNOFF COULD LEAD TO FLOODING OF CREEKS AND RIVERS IN THE AREA. * EXPECT POOR DRAINAGE FLOODING TO IMPACT TRAVEL ON SATURDAY. FLOODING ON CREEKS AND RIVER MIGHT LAST INTO SUNDAY IF HEAVY RAIN OCCURS. * PRIOR TO SATURDAY SOME ICE JAMS MIGHT CAUSE FLOODING TODAY AND TONIGHT. THE CHANCES WILL START DECREASING AS TEMPERATURES RISE ABOVE FREEZING LATER TODAY. 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. && $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 8, 5:08 AM EST | Wind Chill Advisory | PHI | Carbon, Monroe | 5 hr |
| Jan 8, 2:58 PM EST | River Flood Warning | PHI | Bucks | 30 hr |
| Jan 8, 5:04 PM EST | Areal Flood Warning | PHI | Northampton | 42 hr |
| Jan 7, 7:34 PM EST | Low Water Advisory | PHI | 79 min |
Nearby
Flash Flood Watches in Pennsylvania, 2014Flash Flood Watches in New Jersey, 2014Every flash flood watch in 2014
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.