Alert archive / New Jersey / Flash Flood Watches in 2018
Flash Flood Watch 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jul 27, 2018, 9:50 AM EDT for 4 states. It took effect at Jul 27, 2018, 2:00 PM EDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 27, 2018, 9:50 AM EDT (13:50 UTC)
- In effect from
- Jul 27, 2018, 2:00 PM EDT
- Expired
- Jul 27, 2018, 11:00 PM EDT
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
All 30 counties
Kent County, DE, New Castle County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Salem 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), 74 km from the middle of the area, began a volume at 13:51 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 1.8 hours before the alert went out and 220 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
- 958 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1053 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
819 WGUS61 KPHI 271350 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 950 AM EDT Fri Jul 27 2018 MDZ008-012-015-019-020-PAZ054-055-060>062-101>103-105-280300- /O.NEW.KPHI.FF.A.0010.180727T1800Z-180728T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cecil-Kent MD-Queen Annes-Talbot-Caroline-Carbon-Monroe-Berks- Lehigh-Northampton-Western Chester-Eastern Chester- Western Montgomery-Upper Bucks- Including the cities of Elkton, Chestertown, Centreville, Easton, Denton, Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Chalfont, and Perkasie 950 AM EDT Fri Jul 27 2018 ...FLASH FLOOD WATCH IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... The National Weather Service in Mount Holly has issued a * Flash Flood Watch for portions of northeast Maryland and Pennsylvania, including the following areas, in northeast Maryland, Caroline, Cecil, Kent MD, Queen Annes, and Talbot. In Pennsylvania, Berks, Carbon, Eastern Chester, Lehigh, Monroe, Northampton, Upper Bucks, Western Chester, and Western Montgomery. * From 2 PM EDT this afternoon through this evening * Showers and thunderstorms are expected this afternoon and this evening across the region. Though not as much rain is expected as what we saw earlier this week, the ground is already saturated across the watch area, so any additional rainfall will quickly become runoff and could lead to flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ SFJ
3 follow-up statements
133 WGUS61 KPHI 272146 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 546 PM EDT Fri Jul 27 2018 DEZ001-002-NJZ001-007>010-012-013-015>019-021-PAZ070-071-104-106- 280500- /O.EXB.KPHI.FF.A.0010.000000T0000Z-180728T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Cumberland-Delaware-Philadelphia- Eastern Montgomery-Lower Bucks- Including the cities of Wilmington, Dover, Newton, Washington, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Millville, Media, Philadelphia, Norristown, Lansdale, Morrisville, and Doylestown 546 PM EDT Fri Jul 27 2018 ...FLASH FLOOD WATCH IN EFFECT UNTIL 1 AM EDT SATURDAY... The National Weather Service in Mount Holly has expanded the * Flash Flood Watch for portions of the Delaware Valley and Interstate-95 corridor in northern Delaware, southeastern Pennsylvania, and New Jersey. * Until 1 AM EDT Saturday. * Numerous showers and thunderstorms this afternoon had already produced locally heavy rainfall and flash flooding in a few spots. Additional showers and thunderstorms moving in from the southwest this evening will prolong the risk for at least localized flash flooding into the midnight hour with rainfall rates of 2 inches per hour possible. * Heavy rainfall within a short period of time can lead to rapidly rising water and flash flooding, particularly in urban areas, along small creeks and streams and in areas where the ground is already very saturated due to recent heavy rains. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ MDZ008-012-015-019-020-PAZ054-055-060>062-101>103-105-280300- /O.CON.KPHI.FF.A.0010.000000T0000Z-180728T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cecil-Kent MD-Queen Annes-Talbot-Caroline-Carbon-Monroe-Berks- Lehigh-Northampton-Western Chester-Eastern Chester- Western Montgomery-Upper Bucks- Including the cities of Elkton, Chestertown, Centreville, Easton, Denton, Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Chalfont, and Perkasie 546 PM EDT Fri Jul 27 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 11 PM EDT THIS EVENING... The Flash Flood Watch continues for * Portions of northeast Maryland and eastern Pennsylvania. * Until 11 PM EDT this evening. * Numerous showers and thunderstorms this afternoon had already produced locally heavy rainfall and flash flooding in Berks, Carbon and Monroe Counties in eastern Pennsylvania. Additional showers and thunderstorms moving in from the southwest this evening will prolong the risk for at least localized flash flooding through the late evening with rainfall rates of 2 inches per hour possible. * Heavy rainfall within a short period of time can lead to rapidly rising water and flash flooding, particularly in urban areas, along small creeks and streams and in areas where the ground is already very saturated due to recent heavy rains. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ JRK
602 WGUS61 KPHI 280103 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 903 PM EDT Fri Jul 27 2018 DEZ001-002-NJZ013-015>019-021-PAZ070-071-104-106-280215- /O.CAN.KPHI.FF.A.0010.000000T0000Z-180728T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Cumberland-Delaware-Philadelphia- Eastern Montgomery-Lower Bucks- Including the cities of Wilmington, Dover, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Millville, Media, Philadelphia, Norristown, Lansdale, Morrisville, and Doylestown 903 PM EDT Fri Jul 27 2018 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of Delaware, New Jersey, and southeast Pennsylvania has been cancelled. The complex of heavy showers and thunderstorms has moved north of the area this evening. The threat of heavy rainfall and additional flash flooding has diminished in its wake. $$ MDZ008-012-015-019-020-PAZ060-101>103-105-280215- /O.CAN.KPHI.FF.A.0010.000000T0000Z-180728T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Cecil-Kent MD-Queen Annes-Talbot-Caroline-Berks-Western Chester- Eastern Chester-Western Montgomery-Upper Bucks- Including the cities of Elkton, Chestertown, Centreville, Easton, Denton, Reading, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Chalfont, and Perkasie 903 PM EDT Fri Jul 27 2018 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of northeast Maryland and Pennsylvania has been cancelled. The complex of heavy showers and thunderstorms has moved north of the area this evening. The threat of heavy rainfall and additional flash flooding has diminished in its wake. $$ NJZ001-007>010-012-280300- /O.EXT.KPHI.FF.A.0010.000000T0000Z-180728T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Including the cities of Newton, Washington, Morristown, Flemington, Somerville, and New Brunswick 903 PM EDT Fri Jul 27 2018 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 11 PM EDT THIS EVENING... The Flash Flood Watch is now in effect for * Portions of northern New Jersey and northwest New Jersey, including the following areas, in northern New Jersey, Middlesex, Morris, Somerset, Sussex, and Warren. In northwest New Jersey, Hunterdon. * Until 11 PM EDT this evening * Locally heavier showers and thunderstorms embedded within a broader area of steady rain continues to move northward through northern New Jersey this evening although it has gradually weakened. While the risk for additional heavy rainfall will also diminish into the late evening, it will not take much rain to produce flooding since the ground is very saturated and many smaller streams and creeks are already running near bankful. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ PAZ054-055-061-062-280300- /O.CON.KPHI.FF.A.0010.000000T0000Z-180728T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe-Lehigh-Northampton- Including the cities of Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton 903 PM EDT Fri Jul 27 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 11 PM EDT THIS EVENING... The Flash Flood Watch continues for * Portions of east central Pennsylvania and northeast Pennsylvania, including the following areas, in east central Pennsylvania, Lehigh and Northampton. In northeast Pennsylvania, Carbon and Monroe. * Until 11 PM EDT this evening * Locally heavier showers and thunderstorms embedded within a broader area of steady rain continues to move northward through the southern Poconos and Lehigh Valley this evening although it has gradually weakened. While the risk for additional heavy rainfall will also diminish into the late evening, it will not take much rain to produce flooding since the ground is very saturated and many smaller streams and creeks are already running near bankful. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ JRK
619 WGUS61 KPHI 280249 FFAPHI Flood Watch National Weather Service Mount Holly NJ 1049 PM EDT Fri Jul 27 2018 PAZ054-055-061-062-280400- /O.EXP.KPHI.FF.A.0010.000000T0000Z-180728T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe-Lehigh-Northampton- Including the cities of Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton 1049 PM EDT Fri Jul 27 2018 ...FLASH FLOOD WATCH WILL EXPIRE AT 11 PM EDT THIS EVENING... The Flash Flood Watch for portions of east central Pennsylvania and northeast Pennsylvania will expire at 11 PM EDT this evening. The heavy rain has ended across the area and the threat for flash flooding has diminished. However, there may still be a few isolated showers or thunderstorms overnight. $$ NJZ001-007>010-012-280400- /O.EXP.KPHI.FF.A.0010.000000T0000Z-180728T0300Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Including the cities of Newton, Washington, Morristown, Flemington, Somerville, and New Brunswick 1049 PM EDT Fri Jul 27 2018 ...FLASH FLOOD WATCH WILL EXPIRE AT 11 PM EDT THIS EVENING... The Flash Flood Watch for portions of northern New Jersey and northwest New Jersey will expire at 11 PM EDT this evening. The heavy rain has ended across the area and the threat for flash flooding has diminished. However, there may still be a few isolated showers or thunderstorms overnight. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 12:17 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 2 hr |
| Jul 27, 12:35 PM EDT | Flash Flood Warning | PHI | Monroe | 63 min |
| Jul 27, 1:02 PM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| Jul 27, 1:08 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 37 min |
| Jul 27, 1:19 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery | 4 hr |
| Jul 27, 1:42 PM EDT | Special Weather Statement | PHI | Montgomery | 48 min |
| Jul 27, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 49 min |
| Jul 27, 3:47 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 4 hr |
| Jul 27, 3:54 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Jul 27, 4:27 PM EDT | Special Weather Statement | PHI | Philadelphia | 33 min |
| Jul 27, 4:33 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 27 min |
| Jul 27, 4:43 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery, Philadelphia | 5 hr |
| Jul 27, 4:44 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 7 hr |
| Jul 27, 5:00 PM EDT | Flash Flood Warning | PHI | Monroe | 3 hr |
| Jul 27, 5:13 PM EDT | Special Weather Statement | PHI | Monroe | 47 min |
| Jul 27, 5:27 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Northampton | 4 hr |
| Jul 27, 5:43 PM EDT | Special Weather Statement | PHI | Lehigh | 47 min |
| Jul 27, 6:03 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 42 min |
| Jul 27, 6:06 PM EDT | Areal Flood Advisory | PHI | Berks, Chester | 3 hr |
| Jul 27, 6:36 PM EDT | Special Weather Statement | PHI | Berks | 39 min |
| Jul 27, 6:40 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 50 min |
| Jul 27, 7:03 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 27, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 51 min |
| Jul 27, 7:37 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery | 116 min |
| Jul 27, 7:46 PM EDT | Special Weather Statement | PHI | Montgomery | 44 min |
| Jul 27, 7:49 PM EDT | Areal Flood Warning | PHI | Berks | 4 hr |
| Jul 27, 7:49 PM EDT | Special Weather Statement | PHI | Berks | 41 min |
| Jul 27, 7:53 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh, Montgomery | 110 min |
| Jul 27, 7:55 PM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Montgomery, Northampton | 108 min |
| Jul 27, 5:08 PM EDT | Areal Flood Advisory | PHI | Caroline, Queen Anne's | 4 hr |
| Jul 27, 5:44 PM EDT | Areal Flood Advisory | PHI | Cecil, Kent, Queen Anne's | 3 hr |
| Jul 27, 9:29 AM EDT | Special Weather Statement | PHI | Salem | 61 min |
| Jul 27, 10:08 AM EDT | Special Weather Statement | PHI | Cumberland | 67 min |
| Jul 27, 10:34 AM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 10 hr |
| Jul 27, 11:11 AM EDT | Special Weather Statement | PHI | Atlantic | 64 min |
| Jul 27, 12:10 PM EDT | Special Weather Statement | PHI | Atlantic | 65 min |
| Jul 27, 12:24 PM EDT | Areal Flood Advisory | PHI | Cape May | 114 min |
| Jul 27, 1:15 PM EDT | Special Weather Statement | PHI | Salem | 45 min |
| Jul 27, 1:23 PM EDT | Special Weather Statement | PHI | Morris | 52 min |
| Jul 27, 1:31 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jul 27, 1:38 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset | 4 hr |
| Jul 27, 2:04 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset | 41 min |
| Jul 27, 2:14 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 46 min |
| Jul 27, 2:19 PM EDT | Special Marine Warning | PHI | 56 min | |
| Jul 27, 2:22 PM EDT | Special Marine Warning | PHI | 53 min | |
| Jul 27, 2:26 PM EDT | Areal Flood Advisory | PHI | Cumberland, Salem | 6 hr |
| Jul 27, 2:40 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jul 27, 2:59 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 46 min |
| Jul 27, 3:09 PM EDT | Areal Flood Advisory | PHI | Cumberland, Salem | 6 hr |
| Jul 27, 3:14 PM EDT | Special Marine Warning | PHI | 61 min | |
| Jul 27, 3:45 PM EDT | Special Weather Statement | PHI | Cumberland | 30 min |
| Jul 27, 4:12 PM EDT | Special Marine Warning | PHI | 63 min | |
| Jul 27, 4:18 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland, Gloucester, Salem | 42 min |
| Jul 27, 4:19 PM EDT | Flash Flood Warning | PHI | Cumberland | 4 hr |
| Jul 27, 4:25 PM EDT | Areal Flood Advisory | PHI | Middlesex, Somerset | 7 hr |
| Jul 27, 4:32 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Somerset | 43 min |
| Jul 27, 4:54 PM EDT | Flash Flood Warning | PHI | Middlesex | 4 hr |
| Jul 27, 5:03 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Cumberland | 4 hr |
| Jul 27, 5:23 PM EDT | Special Marine Warning | PHI | 67 min | |
| Jul 27, 5:46 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland, Ocean | 4 hr |
| Jul 27, 6:10 PM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex, Monmouth, Somerset | 4 hr |
| Jul 27, 7:14 PM EDT | Special Marine Warning | PHI | 61 min | |
| Jul 27, 7:15 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 4 hr |
| Jul 27, 7:51 PM EDT | Special Weather Statement | PHI | Atlantic | 39 min |
| Jul 27, 8:37 AM EDT | Special Weather Statement | PHI | New Castle | 23 min |
| Jul 27, 2:15 PM EDT | Areal Flood Advisory | PHI | Sussex | 6 hr |
| Jul 27, 4:19 PM EDT | Special Weather Statement | PHI | Sussex | 41 min |
| Jul 27, 5:03 PM EDT | Special Weather Statement | PHI | Kent | 27 min |
| Jul 27, 5:09 PM EDT | Areal Flood Advisory | PHI | Sussex | 3 hr |
| Jul 27, 6:53 PM EDT | Special Weather Statement | PHI | New Castle | 52 min |
Nearby
Flash Flood Watches in New Jersey, 2018Flash Flood Watches in Pennsylvania, 2018Flash Flood Watches in Maryland, 2018Every flash flood watch in 2018
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.