Alert archive / Pennsylvania / Flash Flood Watches in 2011
Flash Flood Watch 9, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Sep 28, 2011, 3:56 AM EDT for 7 counties in Pennsylvania; 5 counties in New Jersey. It was in force for 39 hr.
The area
The counties it named.
The facts
- Issued
- Sep 28, 2011, 3:56 AM EDT (07:56 UTC)
- Expired
- Sep 29, 2011, 6:32 PM EDT
- In force
- 39 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties Hunterdon 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), 101 km from the middle of the area, began a volume at 08:00 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, 7.9 hours before the alert went out and 197 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
- 10 J/kg
- Mixed-layer CIN
- -134 J/kg
- Mixed-layer LCL
- 500 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
695 WGUS61 KPHI 280756 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 356 AM EDT WED SEP 28 2011 NJZ001-007-PAZ054-055-060>062-067>071-281600- /O.NEW.KPHI.FF.A.0009.110928T0800Z-110929T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER- MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 356 AM EDT WED SEP 28 2011 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN NEW JERSEY...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS...BUCKS... CARBON...CHESTER...DELAWARE...LEHIGH...MONROE...MONTGOMERY... NORTHAMPTON AND PHILADELPHIA. * THROUGH LATE TONIGHT * THIS MONTH...9 TO 11 INCHES OF RAIN HAS OCCURRED FROM PARTS OF THE PHILADELPHIA METRO AREA OUT TO READING AND NORTHWARD TO ALLENTOWN AND MOUNT POCONO...MAKING THIS A TOP 5 WETTEST SEPTEMBER IN MANY LOCATIONS WITHIN THE WATCH AREA. * ALREADY THE LEHIGH RIVER IS RESPONDING TO LAST NIGHTS 2 AND ONE HALF INCH RAINS IN PARTS OF THE POCONOS. URBAN CENTERS AS WELL AS PORTIONS OF BERKS...MONGTOMERY...BUCKS...CARBON AND MONROE COUNTIES IN PENNSYLVANIA ARE ESPECIALLY SUSCEPTIBLE TO VERY FAST RUNOFF. * THE COMBINATION OF VERY WET GROUND FROM THE RECENT HEAVY RAINS AND THE POSSIBILITY OF SEVERAL SMALL CLUSTERS OF ONE TO 3 INCH RAINS IN A 2 HOUR PERIOD...PROMPTED THE ISSUANCE OF THIS WATCH. * THE BEST CHANCE FOR ANY FLOOD PRODUCING RAIN IS LATE THIS AFTERNOON AND TONIGHT. * ADDITIONAL HEAVY SHOWERS ARE POSSIBLE THURSDAY BUT THOSE WILL BE MOVING EASTWARD AND MUCH FASTER THAN ANY OF THE HEAVY SHOWERS OCCURRING TODAY AND TONIGHT. 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. && $$ DRAG
7 follow-up statements
501 WGUS61 KPHI 281039 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 639 AM EDT WED SEP 28 2011 NJZ001-007-PAZ054-055-060>062-067>071-281845- /O.CON.KPHI.FF.A.0009.000000T0000Z-110929T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER- MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 639 AM EDT WED SEP 28 2011 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN NEW JERSEY...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS...BUCKS...CARBON...CHESTER... DELAWARE...LEHIGH...MONROE...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH LATE TONIGHT * THE MOST DANGEROUS CONCERN BETWEEN NOW AND 10 AM IS FROM SUSSEX COUNTY SOUTHWARD IN NORTHWEST NEW JERSEY WHERE EXCESSIVE SHORT TERM RAINFALL IS OCCURRING. RESPONSES WILL BE VERY QUICK THERE AND EXPECT WIDESPREAD LOCALIZED FLOODING THERE. * OTHERWISE THIS MONTH...9 TO 11 INCHES OF RAIN HAS OCCURRED FROM PARTS OF THE PHILADELPHIA METRO AREA OUT TO READING AND NORTHWARD TO ALLENTOWN AND MOUNT POCONO...MAKING THIS A TOP 5 WETTEST SEPTEMBER IN MANY LOCATIONS WITHIN THE WATCH AREA. * THE URBAN CENTERS IN THE WATCH AREA AS WELL AS PORTIONS OF BERKS...MONGTOMERY...BUCKS...CARBON AND MONROE COUNTIES IN PENNSYLVANIA ARE ESPECIALLY SUSCEPTIBLE TO VERY FAST RUNOFF AS ARE SUSSEX AND WARREN COUNTIES IN NORTHWEST NEW JERSEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ DRAG
618 WGUS61 KPHI 281841 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 241 PM EDT WED SEP 28 2011 NJZ008>010-290300- /O.EXB.KPHI.FF.A.0009.000000T0000Z-110929T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MORRIS-HUNTERDON-SOMERSET- INCLUDING THE CITIES OF...MORRISTOWN...FLEMINGTON...SOMERVILLE 241 PM EDT WED SEP 28 2011 ...FLASH FLOOD WATCH IN EFFECT THROUGH THURSDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE PORTIONS OF NORTHERN NEW JERSEY AND NORTHWEST NEW JERSEY...INCLUDING THE FOLLOWING AREAS...IN NORTHERN NEW JERSEY...MORRIS AND SOMERSET. IN NORTHWEST NEW JERSEY...HUNTERDON. * THROUGH THURSDAY AFTERNOON * THERE IS THE POSSIBILITY OF HEAVY RAINS AT TIMES THROUGH THURSDAY. THE GROUND REMAIN VERY WET FROM THE RAINS OF THE PAST MONTH AND CAN NOT HOLD MUCH RAINFALL. 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. && $$ NJZ001-007-PAZ054-055-060>062-067>071-290300- /O.EXT.KPHI.FF.A.0009.000000T0000Z-110929T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-CHESTER- MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...JIM THORPE... STROUDSBURG...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 241 PM EDT WED SEP 28 2011 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THURSDAY AFTERNOON... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF NORTHERN NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN NEW JERSEY...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS...BUCKS...CARBON...CHESTER... DELAWARE...LEHIGH...MONROE...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH THURSDAY AFTERNOON * THERE IS THE POSSIBILITY OF HEAVY RAINS AT TIMES THROUGH THURSDAY. THE GROUND REMAIN VERY WET FROM THE RAINS OF THE PAST MONTH AND CAN NOT HOLD MUCH RAINFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$
850 WGUS61 KPHI 290101 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 901 PM EDT WED SEP 28 2011 NJZ001-007>010-PAZ054-055-060>062-067>071-291015- /O.CON.KPHI.FF.A.0009.000000T0000Z-110929T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-CARBON-MONROE-BERKS- LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... FLEMINGTON...SOMERVILLE...JIM THORPE...STROUDSBURG...READING... ALLENTOWN...BETHLEHEM...EASTON...WEST CHESTER...NORRISTOWN... DOYLESTOWN...MEDIA...PHILADELPHIA 901 PM EDT WED SEP 28 2011 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY AFTERNOON... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY...HUNTERDON...MORRIS... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH...MONROE... MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH THURSDAY AFTERNOON * THERE IS THE POSSIBILITY OF HEAVY RAINS AT TIMES THROUGH THURSDAY. THE GROUND REMAINS VERY WET FROM THE RAINS OF THE PAST MONTH AND CAN NOT HOLD MUCH RAINFALL. * SOME AREAS WITHIN THE WATCH HAVE ALREADY RECEIVED 2 TO 3 INCHES THROUGH WEDNESDAY EVENING. AN ADDITIONAL INCH OR TWO OF RAIN CAN BE EXPECTED IN SOME LOCATIONS ON THURSDAY. THIS WILL CAUSE POOR DRAINAGE AREAS AND SMALL STREAMS AND CREEKS TO FLOOD. 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
293 WGUS61 KPHI 290746 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 346 AM EDT THU SEP 29 2011 NJZ001-007>010-PAZ054-055-060>062-067>071-291600- /O.CON.KPHI.FF.A.0009.000000T0000Z-110929T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-CARBON-MONROE-BERKS- LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... FLEMINGTON...SOMERVILLE...JIM THORPE...STROUDSBURG...READING... ALLENTOWN...BETHLEHEM...EASTON...WEST CHESTER...NORRISTOWN... DOYLESTOWN...MEDIA...PHILADELPHIA 346 AM EDT THU SEP 29 2011 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY...HUNTERDON...MORRIS... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH...MONROE... MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * THROUGH THIS AFTERNOON * ONE BATCH OF VERY HEAVY RAIN WITH EMBEDDED THUNDERSTORMS WILL AFFECT THE NORTHERN NEW JERSEY COUNTIES OF HUNTERDON...WARREN... SUSSEX...SOMERSET AND MORRIS COUNTIES BETWEEN NOW AND 9 AM. THIS MAY RESULT IN NEW OR RENEWED FLOODING NEAR DAYBREAK. THIS MORNINGS BATCH OF RAIN MAY PRODUCE 1 INCH OF RAIN IN AN HOUR. * THEN THERE SHOULD BE A BATCH OF BRIEFLY HEAVY SHOWERS AND ISOLATED STRONG THUNDERSTORMS BETWEEN NOON AND 4 PM IN EASTERN PENNSYLVANIA... RACING ACROSS NORTHWEST NEW JERSEY BETWEEN 2 PM AND 6 PM. THIS BATCH SHOULD PRODUCE SPOTTY ONE HALF TO 1.5 INCH RAINS...ESPECIALLY FROM THE LEHIGH VALLEY AND POCONOS INTO NORTHERN NEW JERSEY. THIS COULD FURTHER AGGRAVATE FLOODING THAT HAS ALREADY OCCURRED SINCE YESTERDAY. * ALLENTOWN PENNSYLVANIA HAS RECEIVED RECORD RAINS FOR THE MONTH OF SEPTEMBER. 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
899 WGUS61 KPHI 291045 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 645 AM EDT THU SEP 29 2011 NJZ001-007>010-PAZ054-055-060>062-067>071-291845- /O.CON.KPHI.FF.A.0009.000000T0000Z-110929T2100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-CARBON-MONROE-BERKS- LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... FLEMINGTON...SOMERVILLE...JIM THORPE...STROUDSBURG...READING... ALLENTOWN...BETHLEHEM...EASTON...WEST CHESTER...NORRISTOWN... DOYLESTOWN...MEDIA...PHILADELPHIA 645 AM EDT THU SEP 29 2011 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 5 PM EDT THIS AFTERNOON... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY...HUNTERDON...MORRIS... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH...MONROE... MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * UNTIL 5 PM EDT THIS AFTERNOON * RUNOFF FROM THIS MORNINGS BATCH OF HEAVY SHOWERS MAY CAUSE A BIT OF RENEWED FLOODING IN SMALL PORTIONS OF THE NORTHERN NEW JERSEY COUNTIES OF HUNTERDON... WARREN... SUSSEX...SOMERSET AND MORRIS COUNTIES BETWEEN NOW AND 9 AM. OTHERWISE THE SHOWERS HAVE BASICALLY ENDED THERE THIS MORNING. * THEN THERE SHOULD BE A BATCH OF BRIEFLY HEAVY SHOWERS AND ISOLATED STRONG THUNDERSTORMS BETWEEN NOON AND 4 PM IN EASTERN PENNSYLVANIA... RACING ACROSS NORTHWEST NEW JERSEY BETWEEN 2 PM AND 6 PM. THIS BATCH SHOULD PRODUCE SPOTTY ONE HALF TO 1.5 INCH RAINS...ESPECIALLY FROM THE LEHIGH VALLEY AND POCONOS INTO NORTHERN NEW JERSEY. THIS COULD FURTHER AGGRAVATE FLOODING THAT HAS ALREADY OCCURRED SINCE YESTERDAY. 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. && $$
148 WGUS61 KPHI 292004 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 404 PM EDT THU SEP 29 2011 NJZ001-007>010-PAZ054-055-060>062-067>071-300000- /O.EXT.KPHI.FF.A.0009.000000T0000Z-110930T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-CARBON-MONROE-BERKS- LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... FLEMINGTON...SOMERVILLE...JIM THORPE...STROUDSBURG...READING... ALLENTOWN...BETHLEHEM...EASTON...WEST CHESTER...NORRISTOWN... DOYLESTOWN...MEDIA...PHILADELPHIA 404 PM EDT THU SEP 29 2011 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 8 PM EDT THIS EVENING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY...HUNTERDON...MORRIS... SOMERSET...SUSSEX AND WARREN. IN PENNSYLVANIA...BERKS... BUCKS...CARBON...CHESTER...DELAWARE...LEHIGH...MONROE... MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * UNTIL 8 PM EDT THIS EVENING * RUNOFF FROM EARLIER HEAVY RAIN COULD RESULT IN SHARP RISES ON CREEKS AND STREAMS. THIS COULD RESULT IN RENEWED FLOODING DURING THE EVENING HOURS. * ADDITIONAL SHOWERS AND THUNDERSTORMS ARE POSSIBLE THROUGH THE EVENING HOURS. ANY LOCALLY HEAVY RAINFALL ASSOCIATED WITH THE SHOWERS AND THUNDERSTORMS COULD LEAD TO ISOLATED FLOODING INTO THE EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$
752 WGUS61 KPHI 292232 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 632 PM EDT THU SEP 29 2011 NJZ001-007>010-PAZ054-055-060>062-067>071-292345- /O.CAN.KPHI.FF.A.0009.000000T0000Z-110930T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-CARBON-MONROE-BERKS- LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... FLEMINGTON...SOMERVILLE...JIM THORPE...STROUDSBURG...READING... ALLENTOWN...BETHLEHEM...EASTON...WEST CHESTER...NORRISTOWN... DOYLESTOWN...MEDIA...PHILADELPHIA 632 PM EDT THU SEP 29 2011 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NEW JERSEY AND PENNSYLVANIA HAS BEEN CANCELLED. THE LAST OF THE SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN WILL EXIT NORTHWEST NEW JERSEY SHORTLY. EVEN THOUGH THE HEAVIEST RAIN WILL EXIT...RUNOFF CONTINUES TO CAUSE RISES ON SMALL STREAMS. $$ HAYES
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 8:16 PM EDT | Areal Flood Warning | PHI | Carbon, Monroe | 3 hr |
| Sep 27, 11:53 PM EDT | Coastal Flood Statement | PHI | Delaware, Philadelphia | 4 hr |
| Sep 28, 1:54 AM EDT | Special Weather Statement | PHI | Bucks, Delaware, Lehigh, Monroe, Montgomery, Northampton and 1 more | 51 min |
| Sep 28, 4:38 AM EDT | Areal Flood Warning | PHI | Bucks | 3 hr |
| Sep 28, 5:45 AM EDT | Special Weather Statement | PHI | Montgomery | 60 min |
| Sep 28, 10:02 AM EDT | Coastal Flood Statement | PHI | Delaware, Philadelphia | 8 hr |
| Sep 28, 11:15 AM EDT | Special Weather Statement | PHI | Berks | 60 min |
| Sep 28, 12:24 PM EDT | Special Weather Statement | PHI | Lehigh | 51 min |
| Sep 28, 3:20 PM EDT | Special Weather Statement | PHI | Chester, Delaware, Montgomery | 55 min |
| Sep 28, 3:59 PM EDT | Special Weather Statement | PHI | Berks, Chester, Delaware, Montgomery | 61 min |
| Sep 28, 4:21 PM EDT | Special Weather Statement | PHI | Carbon | 54 min |
| Sep 28, 4:33 PM EDT | Areal Flood Advisory | PHI | Berks, Chester, Montgomery | 2 hr |
| Sep 28, 4:36 PM EDT | Flash Flood Warning | PHI | Berks, Chester | 3 hr |
| Sep 28, 4:48 PM EDT | Special Weather Statement | PHI | Northampton | 57 min |
| Sep 28, 4:59 PM EDT | Areal Flood Advisory | PHI | Bucks, Northampton | 3 hr |
| Sep 28, 5:02 PM EDT | Special Weather Statement | PHI | Berks, Lehigh | 58 min |
| Sep 28, 5:12 PM EDT | Special Weather Statement | PHI | Lehigh | 63 min |
| Sep 28, 5:29 PM EDT | Special Weather Statement | PHI | Carbon | 61 min |
| Sep 28, 5:32 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Northampton | 58 min |
| Sep 28, 5:42 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Montgomery and 1 more | 3 hr |
| Sep 28, 6:31 PM EDT | Special Weather Statement | PHI | Northampton | 59 min |
| Sep 28, 6:35 PM EDT | Areal Flood Warning | PHI | Bucks | 2 hr |
| Sep 28, 6:41 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Sep 28, 7:44 PM EDT | Areal Flood Warning | PHI | Chester | 3 hr |
| Sep 28, 4:09 AM EDT | Special Weather Statement | PHI | Hunterdon, Morris, Somerset, Warren | 51 min |
| Sep 28, 4:10 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more | 7 hr |
| Sep 28, 4:49 AM EDT | Areal Flood Warning | PHI | Hunterdon, Morris, Warren | 7 hr |
| Sep 28, 5:45 AM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 22 hr |
| Sep 28, 6:29 AM EDT | Flash Flood Warning | PHI | Sussex, Warren | 7 hr |
| Sep 28, 9:17 AM EDT | Special Weather Statement | PHI | Sussex | 58 min |
| Sep 28, 12:00 PM EDT | Areal Flood Warning | PHI | Hunterdon, Morris, Somerset, Warren | 6 hr |
| Sep 28, 3:29 PM EDT | Coastal Flood Statement | PHI | Atlantic, Burlington, Cape May, Cumberland, Monmouth, Ocean | 9 hr |
| Sep 28, 5:58 PM EDT | Areal Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 26 hr |
Nearby
Flash Flood Watches in Pennsylvania, 2011Flash Flood Watches in New Jersey, 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.