Alert archive / New Jersey / Flash Flood Watches in 2017
Flash Flood Watch 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jun 18, 2017, 3:30 AM EDT for 4 states. It took effect at Jun 19, 2017, 12:00 PM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Jun 18, 2017, 3:30 AM EDT (07:30 UTC)
- In effect from
- Jun 19, 2017, 12:00 PM EDT
- Expired
- Jun 19, 2017, 6:22 PM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
All 22 counties
New Castle County, DE, Cecil County, MD, Burlington County, NJ, Camden 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, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 68 km from the middle of the area, began a volume at 07:34 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, 7.5 hours before the alert went out and 202 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
- 40 J/kg
- Mixed-layer CIN
- -147 J/kg
- Mixed-layer LCL
- 539 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
157 WGUS61 KPHI 180730 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 330 AM EDT Sun Jun 18 2017 DEZ001-MDZ008-NJZ008>010-012-013-015>019-PAZ070-071-101>106- 182100- /O.NEW.KPHI.FF.A.0001.170619T1600Z-170620T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Wilmington, Elkton, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 330 AM EDT Sun Jun 18 2017 ...FLASH FLOOD WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY EVENING... The National Weather Service in Mount Holly has issued a * Flash Flood Watch for the Pennsylvania counties of Bucks, Montgomery, Chester, Delaware and Philadelphia, for the New Jersey counties of Morris, Hunterdon, Somerset, Mercer, Middlesex, Monmouth, northwestern Burlington, Camden, Gloucester and Salem, for New Castle County in Delaware, and for Cecil County in Maryland * From Monday afternoon through Monday evening. * Showers and thunderstorms are forecast to affect the region from Monday into Monday night. Rainfall amounts of 1 to 2 inches are expected to be common with localized totals of 3 to 4 inches possible. The heaviest of the rain is anticipated to fall on Monday afternoon and Monday evening. * The heavy rain will cause roadway flooding and flooding in areas of poor drainage. Small streams and creeks may go out of their banks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. Please monitor the forecast today and Monday for updated information. Be prepared to take action should Flash Flood Warnings be issued on Monday. && $$ Iovino
4 follow-up statements
701 WGUS61 KPHI 181935 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 335 PM EDT Sun Jun 18 2017 ...HEAVY RAIN AND FLASH FLOODING POSSIBLE MONDAY AFTERNOON AND EVENING NIGHT... NJZ001-007-PAZ060>062-190345- /O.EXA.KPHI.FF.A.0001.170619T1600Z-170620T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Berks-Lehigh-Northampton- Including the cities of Newton, Washington, Reading, Allentown, Bethlehem, and Easton 335 PM EDT Sun Jun 18 2017 ...FLASH FLOOD WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY EVENING... The National Weather Service in Mount Holly has expanded the * Flash Flood Watch to include the Lehigh Valley and Berks County in eastern Pennsylvania, and far northwestern New Jersey. * Monday afternoon and evening * Showers and thunderstorms on Monday will contain torrential downpours. Rainfall amounts of 1 to 2 inches will be common with localized totals of 3 to 4 inches possible. The bulk of these rainfall amounts could fall in a very short period. The heaviest rain will likely fall during the afternoon and early evening. * Flash flooding of creeks, streams and roadways will be possible, especially in urban and poor drainage areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. Please monitor the forecast today and Monday for updated information. Be prepared to take action should Flash Flood Warnings be issued on Monday. && $$ DEZ001-MDZ008-NJZ008>010-012-013-015>019-PAZ070-071-101>106- 190345- /O.CON.KPHI.FF.A.0001.170619T1600Z-170620T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Wilmington, Elkton, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 335 PM EDT Sun Jun 18 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY EVENING... The Flash Flood Watch continues for * Portions of northern Delaware, northeast Maryland, New Jersey, and southeast Pennsylvania, including the following areas, in northern Delaware, New Castle. In northeast Maryland, Cecil. In New Jersey, Camden, Gloucester, Hunterdon, Mercer, Middlesex, Morris, Northwestern Burlington, Salem, Somerset, and Western Monmouth. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and Western Montgomery. * Monday afternoon and evening * Showers and thunderstorms on Monday will contain torrential downpours. Rainfall amounts of 1 to 2 inches will be common with localized totals of 3 to 5 inches possible. The bulk of these rainfall amounts could fall in a very short period. The heaviest rain will likely fall during the late afternoon and evening. * Flash flooding of creeks, streams and roadways will be possible, especially in urban and poor drainage areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. Please monitor the forecast today and Monday for updated information. Be prepared to take action should Flash Flood Warnings be issued on Monday. && $$ Klein
198 WGUS61 KPHI 190748 FFAPHI Flood Watch National Weather Service Mount Holly NJ 348 AM EDT Mon Jun 19 2017 DEZ001-MDZ008-NJZ001-007>010-012-013-015>019-PAZ060>062-070-071- 101>106-192100- /O.CON.KPHI.FF.A.0001.170619T1600Z-170620T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset- Middlesex-Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Berks-Lehigh-Northampton-Delaware- Philadelphia-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Wilmington, Elkton, Newton, Washington, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Reading, Allentown, Bethlehem, Easton, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 348 AM EDT Mon Jun 19 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM NOON EDT TODAY THROUGH THIS EVENING... The Flash Flood Watch continues for * southeastern Pennsylvania, northern, central and southwestern New Jersey, northern Delaware and extreme northeastern Maryland. * From noon EDT today through this evening * Showers and thunderstorms this afternoon and this evening will contain torrential downpours. Rainfall amounts of 1 to 2 inches will be common with localized totals of 3 to 5 inches possible. The bulk of these rainfall amounts could fall in a very short period. The heaviest rain will likely fall during the late afternoon and evening. * Flash flooding of creeks, streams and roadways will be possible, especially in urban and poor drainage areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. Please monitor the forecast today for updated information. Be prepared to take action should Flash Flood Warnings be issued. && $$ Iovino
562 WGUS61 KPHI 191921 FFAPHI Flood Watch National Weather Service Mount Holly NJ 321 PM EDT Mon Jun 19 2017 DEZ001-MDZ008-NJZ001-007>010-012-013-015>019-PAZ060>062-070-071- 101>106-200400- /O.CON.KPHI.FF.A.0001.000000T0000Z-170620T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset- Middlesex-Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Berks-Lehigh-Northampton-Delaware- Philadelphia-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Wilmington, Elkton, Newton, Washington, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Reading, Allentown, Bethlehem, Easton, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 321 PM EDT Mon Jun 19 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... The Flash Flood Watch continues 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, Mercer, Middlesex, Morris, Northwestern Burlington, Salem, Somerset, Sussex, Warren, and Western Monmouth. In Pennsylvania, Berks, Delaware, Eastern Chester, Eastern Montgomery, Lehigh, Lower Bucks, Northampton, Philadelphia, Upper Bucks, Western Chester, and Western Montgomery. * Until midnight EDT tonight. * Showers and thunderstorms this afternoon and this evening will contain torrential downpours. Rainfall amounts of 1 to 2 inches will be common with localized totals of 3 to 5 inches possible. The bulk of these rainfall amounts could fall in a very short period of time. The heaviest rain will likely occur through early this evening. * Flash flooding of creeks, streams and roadways will be possible, especially in urban and poor drainage areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. Please monitor the forecast today for updated information. Be prepared to take action should Flash Flood Warnings be issued. && $$
034 WGUS61 KPHI 192222 FFAPHI Flood Watch National Weather Service Mount Holly NJ 622 PM EDT Mon Jun 19 2017 DEZ001-MDZ008-NJZ001-007>010-012-013-015>019-PAZ060>062-070-071- 101>106-192330- /O.CAN.KPHI.FF.A.0001.000000T0000Z-170620T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset- Middlesex-Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Berks-Lehigh-Northampton-Delaware- Philadelphia-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Wilmington, Elkton, Newton, Washington, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Reading, Allentown, Bethlehem, Easton, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 622 PM EDT Mon Jun 19 2017 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of northern Delaware, northeast Maryland, New Jersey, and Pennsylvania has been cancelled. The drenching line of showers and thunderstorms has moved out of the area as it nears the coast. The threat of very heavy rain and flash flooding has ended, and therefore the flash flood watch has been cancelled. $$ Gorse
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 8:35 PM EDT | Marine Dense Fog Advisory | PHI | 13 hr |
Nearby
Flash Flood Watches in New Jersey, 2017Flash Flood Watches in Pennsylvania, 2017Flash Flood Watches in Maryland, 2017Every flash flood watch in 2017
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.