Alert archive / Pennsylvania / Flash Flood Watches in 2021
Flash Flood Watch 11, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Sep 22, 2021, 3:24 AM EDT for 7 counties in New Jersey; New Castle County, Delaware; 10 counties in Pennsylvania. It took effect at Sep 23, 2021, 8:00 AM EDT. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Sep 22, 2021, 3:24 AM EDT (07:24 UTC)
- In effect from
- Sep 23, 2021, 8:00 AM EDT
- Expired
- Sep 23, 2021, 8:04 PM EDT
- In force
- 12 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, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 87 km from the middle of the area, began a volume at 07:25 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, 7.4 hours before the alert went out and 200 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
- 17 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 628 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
886 WGUS61 KPHI 220724 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 324 AM EDT Wed Sep 22 2021 PAZ054-055-060>062-070-071-101>106-221930- /O.NEW.KPHI.FF.A.0011.210923T1800Z-210924T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Media, Lansdale, Honey Brook, Jim Thorpe, West Chester, Allentown, Morrisville, Philadelphia, Doylestown, Collegeville, Chalfont, Pottstown, Bethlehem, Stroudsburg, Oxford, Perkasie, Reading, Kennett Square, Easton, and Norristown 324 AM EDT Wed Sep 22 2021 ...FLASH FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY MORNING... The National Weather Service in Mount Holly has issued a * Flash Flood Watch for portions of east central Pennsylvania... northeast Pennsylvania...and southeast Pennsylvania...including the following areas...in east central Pennsylvania...Berks, Lehigh, and Northampton. In northeast Pennsylvania...Carbon and Monroe. In southeast Pennsylvania...Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and Western Montgomery. * From Thursday afternoon through Friday morning. * Showers and thunderstorms will develop ahead of and with the passage of a cold front Thursday afternoon through late Thursday night. Rain will be heavy at times. Widespread rainfall totals will range from 2 to 3 inches with locally higher amounts. * Flash flooding is possible during this time. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ NJZ001-007>010-012-015-221930- /O.NEW.KPHI.FF.A.0011.210923T2100Z-210924T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- Including the cities of Trenton, Flemington, Newton, Washington, Morristown, Somerville, and New Brunswick 324 AM EDT Wed Sep 22 2021 ...FLASH FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY MORNING... The National Weather Service in Mount Holly has issued a * Flash Flood Watch for portions of central New Jersey...northern New Jersey...and northwest New Jersey...including the following areas...in central New Jersey...Mercer. In northern New Jersey... Middlesex, Morris, Somerset, Sussex, and Warren. In northwest New Jersey...Hunterdon. * From Thursday afternoon through Friday morning. * Showers and thunderstorms will develop ahead of and with the passage of a cold front Thursday night through Friday morning. Rain will be heavy at times. Widespread rainfall totals will range from 1 to 2 inches with locally higher amounts. * Flash flooding is possible during this time. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ MPS
6 follow-up statements
507 WGUS61 KPHI 221908 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 308 PM EDT Wed Sep 22 2021 DEZ001-231000- /O.EXB.KPHI.FF.A.0011.210923T1500Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle- Including the cities of Wilmington 308 PM EDT Wed Sep 22 2021 ...FLASH FLOOD WATCH IN EFFECT FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT... The National Weather Service in Mount Holly has expanded the * Flash Flood Watch to include a portion of northern Delaware... including the following area...New Castle. * From Thursday morning through late Thursday night. * Showers and thunderstorms will develop ahead of and with the passage of a cold front on Thursday afternoon and Thursday evening. Rain will be heavy at times. Widespread rainfall totals will range from 1.5 to 3 inches with locally higher amounts possible. * Flash flooding is possible during this time. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ PAZ054-055-060>062-070-071-101>106-231000- /O.EXT.KPHI.FF.A.0011.210923T1500Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Media, Lansdale, Honey Brook, Jim Thorpe, West Chester, Allentown, Morrisville, Philadelphia, Doylestown, Collegeville, Chalfont, Pottstown, Bethlehem, Stroudsburg, Oxford, Perkasie, Reading, Kennett Square, Easton, and Norristown 308 PM EDT Wed Sep 22 2021 ...FLASH FLOOD WATCH NOW IN EFFECT FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT... The Flash Flood Watch is now in effect for * Portions of east central Pennsylvania...northeast Pennsylvania... and southeast Pennsylvania...including the following areas...in east central Pennsylvania...Berks, Lehigh, and Northampton. In northeast Pennsylvania...Carbon and Monroe. In southeast Pennsylvania...Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and Western Montgomery. * From Thursday morning through late Thursday night. * Showers and thunderstorms will develop ahead of and with the passage of a cold front on Thursday afternoon and Thursday evening. Rain will be heavy at times. Widespread rainfall totals will range from 1.5 to 3 inches with locally higher amounts possible. * Flash flooding is possible during this time. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ NJZ001-007>010-012-015-231000- /O.EXT.KPHI.FF.A.0011.210923T1800Z-210924T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- Including the cities of Trenton, Flemington, Newton, Washington, Morristown, Somerville, and New Brunswick 308 PM EDT Wed Sep 22 2021 ...FLASH FLOOD WATCH NOW IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT... The Flash Flood Watch is now in effect for * Portions of central New Jersey...northern New Jersey...and northwest New Jersey...including the following areas...in central New Jersey...Mercer. In northern New Jersey...Middlesex, Morris, Somerset, Sussex, and Warren. In northwest New Jersey...Hunterdon. * From Thursday afternoon through late Thursday night. * Showers and thunderstorms will develop ahead of and with the passage of a cold front on Thursday night. Rain will be heavy at times. Widespread rainfall totals will range from 1 to 2.5 inches with locally higher amounts possible. * Flash flooding is possible during this time. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Iovino
383 WGUS61 KPHI 230127 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 927 PM EDT Wed Sep 22 2021 PAZ054-055-060>062-101-103-105-231400- /O.EXT.KPHI.FF.A.0011.210923T1200Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe-Berks-Lehigh-Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Chalfont, Honey Brook, Jim Thorpe, Allentown, Collegeville, Pottstown, Bethlehem, Stroudsburg, Oxford, Perkasie, Reading, and Easton 927 PM EDT Wed Sep 22 2021 ...FLASH FLOOD WATCH NOW IN EFFECT FROM 8 AM EDT THURSDAY THROUGH LATE THURSDAY NIGHT... The Flash Flood Watch is now in effect for * Portions of east central Pennsylvania...northeast Pennsylvania... and southeast Pennsylvania...including the following areas...in east central Pennsylvania...Berks, Lehigh, and Northampton. In northeast Pennsylvania...Carbon and Monroe. In southeast Pennsylvania...Upper Bucks, Western Chester, and Western Montgomery. * From 8 AM EDT Thursday through late Thursday night. * Showers and thunderstorms will develop ahead of and with the passage of a cold front Thursday morning through Thursday evening. Rain will be heavy at times. Widespread rainfall totals will range from 1.5 to 3 inches with locally higher amounts up to 5 inches possible, especially in the southern Poconos. * Flash flooding of creeks, streams, urban areas, and poor drainage areas is possible in the areas of heaviest rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ NJZ001-007>010-012-015-231400- /O.EXT.KPHI.FF.A.0011.210923T1500Z-210924T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- Including the cities of Trenton, Flemington, Newton, Washington, Morristown, Somerville, and New Brunswick 927 PM EDT Wed Sep 22 2021 ...FLASH FLOOD WATCH NOW IN EFFECT FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT... The Flash Flood Watch is now in effect for * Portions of central New Jersey...northern New Jersey...and northwest New Jersey...including the following areas...in central New Jersey...Mercer. In northern New Jersey...Middlesex, Morris, Somerset, Sussex, and Warren. In northwest New Jersey...Hunterdon. * From Thursday morning through late Thursday night. * Showers and thunderstorms will develop ahead of and with the passage of a cold front on Thursday night. Rain will be heavy at times. Widespread rainfall totals will range from 1 to 2.5 inches with locally higher amounts possible. * Flash flooding of creeks, streams, urban areas, and poor drainage areas is possible in the areas of heaviest rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ DEZ001-PAZ070-071-102-104-106-231400- /O.CON.KPHI.FF.A.0011.210923T1500Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Delaware-Philadelphia-Eastern Chester-Eastern Montgomery- Lower Bucks- Including the cities of Lansdale, West Chester, Media, Morrisville, Wilmington, Philadelphia, Doylestown, Kennett Square, and Norristown 927 PM EDT Wed Sep 22 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH LATE THURSDAY NIGHT... The Flash Flood Watch continues for * Portions of northern Delaware...and southeast Pennsylvania... including the following areas...in northern Delaware...New Castle. In southeast Pennsylvania...Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, and Philadelphia. * From Thursday morning through late Thursday night. * Showers and thunderstorms will develop ahead of and with the passage of a cold front on Thursday afternoon and Thursday evening. Rain will be heavy at times. Widespread rainfall totals will range from 1.5 to 3 inches with locally higher amounts possible. * Flash flooding of creeks, streams, urban areas, and poor drainage areas is possible in the areas of heaviest rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CMS
143 WGUS61 KPHI 230846 FFAPHI Flood Watch National Weather Service Mount Holly NJ 446 AM EDT Thu Sep 23 2021 PAZ054-055-060>062-101-103-105-240215- /O.CON.KPHI.FF.A.0011.210923T1200Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe-Berks-Lehigh-Northampton-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Chalfont, Honey Brook, Jim Thorpe, Allentown, Collegeville, Pottstown, Bethlehem, Stroudsburg, Oxford, Perkasie, Reading, and Easton 446 AM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of east central Pennsylvania...northeast Pennsylvania... and southeast Pennsylvania...including the following areas...in east central Pennsylvania...Berks, Lehigh, and Northampton. In northeast Pennsylvania...Carbon and Monroe. In southeast Pennsylvania...Upper Bucks, Western Chester, and Western Montgomery. * From 8 AM EDT this morning through late tonight. * Showers and thunderstorms will develop ahead of and with the passage of a cold front this morning through this evening. Rain will be heavy at times. Widespread rainfall totals will range from 1.5 to 3 inches with locally higher amounts of 4 to 5 inches possible, especially in the southern Poconos. * Flash flooding of creeks, streams, urban areas, and poor drainage areas is possible in the areas of heaviest rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ DEZ001-PAZ070-071-102-104-106-240215- /O.CON.KPHI.FF.A.0011.210923T1500Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Delaware-Philadelphia-Eastern Chester-Eastern Montgomery- Lower Bucks- Including the cities of Lansdale, West Chester, Media, Morrisville, Wilmington, Philadelphia, Doylestown, Kennett Square, and Norristown 446 AM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 11 AM EDT THIS MORNING THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of northern Delaware...and southeast Pennsylvania... including the following areas...in northern Delaware...New Castle. In southeast Pennsylvania...Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, and Philadelphia. * From 11 AM EDT this morning through late tonight. * Showers and thunderstorms will develop ahead of and with the passage of a cold front this afternoon and evening. Rain will be heavy at times. Widespread rainfall totals will range from 1.5 to 3 inches with locally higher amounts possible. * Flash flooding of creeks, streams, urban areas, and poor drainage areas is possible in the areas of heaviest rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ NJZ001-007>010-012-015-240215- /O.CON.KPHI.FF.A.0011.210923T1500Z-210924T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- Including the cities of Trenton, Flemington, Newton, Washington, Morristown, Somerville, and New Brunswick 446 AM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 11 AM EDT THIS MORNING THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of central New Jersey...northern New Jersey...and northwest New Jersey...including the following areas...in central New Jersey...Mercer. In northern New Jersey...Middlesex, Morris, Somerset, Sussex, and Warren. In northwest New Jersey...Hunterdon. * From 11 AM EDT this morning through late tonight. * Showers and thunderstorms will develop ahead of and with the passage of a cold front tonight. Rain will be heavy at times. Widespread rainfall totals will range from 1 to 2.5 inches with locally higher amounts possible. * Flash flooding of creeks, streams, urban areas, and poor drainage areas is possible in the areas of heaviest rain. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Meola
236 WGUS61 KPHI 231923 FFAPHI Flood Watch National Weather Service Mount Holly NJ 323 PM EDT Thu Sep 23 2021 PAZ054-060-061-101-232030- /O.CAN.KPHI.FF.A.0011.000000T0000Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Berks-Lehigh-Western Chester- Including the cities of Honey Brook, Allentown, Reading, Jim Thorpe, and Oxford 323 PM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of east central Pennsylvania... northeast Pennsylvania...and southeast Pennsylvania...including the following areas...in east central Pennsylvania...Berks and Lehigh. In northeast Pennsylvania...Carbon. In southeast Pennsylvania... Western Chester has been cancelled. The heavy rain threat has ended. The Flood Watch is cancelled. $$ DEZ001-PAZ070-071-102-104-106-240600- /O.CON.KPHI.FF.A.0011.000000T0000Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Delaware-Philadelphia-Eastern Chester-Eastern Montgomery- Lower Bucks- Including the cities of Lansdale, West Chester, Media, Morrisville, Wilmington, Philadelphia, Doylestown, Kennett Square, and Norristown 323 PM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 2 AM EDT FRIDAY... The Flash Flood Watch continues for * Portions of northern Delaware...and southeast Pennsylvania... including the following areas...in northern Delaware...New Castle. In southeast Pennsylvania...Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, and Philadelphia. * Until 2 AM EDT Friday. * Flash flooding remains possible through early tonight as a slow moving frontal system continues to bring a band of heavy rain and thunderstorms to the area. Rainfall amounts of 1 to 3 inches in short duration could lead to areas of flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ NJZ001-007>010-012-015-240845- /O.CON.KPHI.FF.A.0011.000000T0000Z-210924T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- Including the cities of Trenton, Flemington, Newton, Washington, Morristown, Somerville, and New Brunswick 323 PM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of central New Jersey...northern New Jersey...and northwest New Jersey...including the following areas...in central New Jersey...Mercer. In northern New Jersey...Middlesex, Morris, Somerset, Sussex, and Warren. In northwest New Jersey...Hunterdon. * Through late tonight. * Flash flooding remains possible through early tonight as a slow moving frontal system continues to bring a band of heavy rain and thunderstorms to the area. Rainfall amounts of 1 to 3 inches in short duration could lead to areas of flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ PAZ055-062-103-105-240600- /O.CON.KPHI.FF.A.0011.000000T0000Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Monroe-Northampton-Western Montgomery-Upper Bucks- Including the cities of Collegeville, Chalfont, Bethlehem, Stroudsburg, Perkasie, Pottstown, and Easton 323 PM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 2 AM EDT FRIDAY... The Flash Flood Watch continues for * Portions of east central Pennsylvania...northeast Pennsylvania... and southeast Pennsylvania...including the following areas...in east central Pennsylvania...Northampton. In northeast Pennsylvania...Monroe. In southeast Pennsylvania...Upper Bucks and Western Montgomery. * Until 2 AM EDT Friday. * Flash flooding remains possible through early tonight as a slow moving frontal system continues to bring a band of heavy rain and thunderstorms to the area. Rainfall amounts of 1 to 3 inches in short duration could lead to areas of flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ JEO
275 WGUS61 KPHI 232236 FFAPHI Flood Watch National Weather Service Mount Holly NJ 636 PM EDT Thu Sep 23 2021 DEZ001-PAZ055-062-070-071-102>106-232345- /O.CAN.KPHI.FF.A.0011.000000T0000Z-210924T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Monroe-Northampton-Delaware-Philadelphia-Eastern Chester- Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Lansdale, Chalfont, West Chester, Media, Morrisville, Wilmington, Philadelphia, Doylestown, Collegeville, Bethlehem, Stroudsburg, Perkasie, Pottstown, Kennett Square, Easton, and Norristown 636 PM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of northern Delaware...and Pennsylvania...including the following areas...in northern Delaware...New Castle. In Pennsylvania...Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Monroe, Northampton, Philadelphia, Upper Bucks, and Western Montgomery has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ NJZ001-007>010-012-015-240900- /O.CON.KPHI.FF.A.0011.000000T0000Z-210924T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- Including the cities of Trenton, Flemington, Newton, Washington, Morristown, Somerville, and New Brunswick 636 PM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 5 AM EDT FRIDAY... The Flash Flood Watch continues for * Portions of central New Jersey...northern New Jersey...and northwest New Jersey...including the following areas...in central New Jersey...Mercer. In northern New Jersey...Middlesex, Morris, Somerset, Sussex, and Warren. In northwest New Jersey...Hunterdon. * Until 5 AM EDT Friday. * Flash flooding continues in portions of the Watch area with rainfall continuing to wind down this evening. $$ Fitzsimmons
704 WGUS61 KPHI 240004 FFAPHI Flood Watch National Weather Service Mount Holly NJ 804 PM EDT Thu Sep 23 2021 NJZ001-007>010-012-015-240115- /O.CAN.KPHI.FF.A.0011.000000T0000Z-210924T0900Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer- Including the cities of Trenton, Flemington, Newton, Washington, Morristown, Somerville, and New Brunswick 804 PM EDT Thu Sep 23 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of central New Jersey...northern New Jersey...and northwest New Jersey...including the following areas...in central New Jersey...Mercer. In northern New Jersey... Middlesex, Morris, Somerset, Sussex, and Warren. In northwest New Jersey...Hunterdon has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ Fitzsimmons
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 5:01 PM EDT | Coastal Flood Advisory | PHI | Salem | 22 hr |
Nearby
Flash Flood Watches in Pennsylvania, 2021Flash Flood Watches in New Jersey, 2021Flash Flood Watches in Delaware, 2021Every flash flood watch in 2021
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.