Alert archive / New Jersey / Flash Flood Watches in 2019
Flash Flood Watch 9, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jul 17, 2019, 3:54 AM EDT for 4 states. It took effect at Jul 17, 2019, 2:00 PM EDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 17, 2019, 3:54 AM EDT (07:54 UTC)
- In effect from
- Jul 17, 2019, 2:00 PM EDT
- Expired
- Jul 17, 2019, 10:48 PM EDT
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
All 24 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, 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 07:54 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 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
- 32 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 1407 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
431 WGUS61 KPHI 170754 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 354 AM EDT Wed Jul 17 2019 DEZ001-MDZ008-NJZ001-007>010-012-013-015>019-PAZ060>062-070-071- 101>106-172000- /O.NEW.KPHI.FF.A.0009.190717T1800Z-190718T0500Z/ /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 354 AM EDT Wed Jul 17 2019 ...FLASH FLOOD WATCH IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... The National Weather Service in Mount Holly has issued a * Flash 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, 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. * From 2 PM EDT this afternoon through late tonight * A hot and humid airmass will spread over the region today, and then the remnants of what was Tropical Cyclone Barry will pass through the region tonight. Showers and thunderstorms this afternoon and tonight will be capable of producing torrential rainfall, with local amounts of 2 to 4 inches and even higher localized amounts potentially occurring in a short period of time. This could lead to flash flooding. * The risk of flash flooding is highest in urbanized and low- lying areas. Rapid rises on small creeks and streams are possible. 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. && $$ MPS
2 follow-up statements
760 WGUS61 KPHI 171414 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 1014 AM EDT Wed Jul 17 2019 PAZ054-055-180500- /O.EXA.KPHI.FF.A.0009.190717T1800Z-190718T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe- Including the cities of Jim Thorpe and Stroudsburg 1014 AM EDT Wed Jul 17 2019 ...FLASH FLOOD WATCH IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... The National Weather Service in Mount Holly has expanded the * Flash Flood Watch to include a portion of northeast Pennsylvania, including the following areas, Carbon and Monroe. * From 2 PM EDT this afternoon through late tonight * A hot and humid airmass will spread over the region today, and then the remnants of what was Tropical Cyclone Barry will pass through the region tonight. Showers and thunderstorms this afternoon and tonight will be capable of producing torrential rainfall, with local amounts of 2 to 4 inches and even higher localized amounts potentially occurring in a short period of time. This could lead to flash flooding. * The risk of flash flooding is highest in urbanized and low- lying areas. Rapid rises on small creeks and streams are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ DEZ001-MDZ008-NJZ001-007>010-012-013-015>019-PAZ060>062-070-071- 101>106-180500- /O.CON.KPHI.FF.A.0009.190717T1800Z-190718T0500Z/ /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 1014 AM EDT Wed Jul 17 2019 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH LATE 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. * From 2 PM EDT this afternoon through late tonight * A hot and humid airmass will spread over the region today, and then the remnants of what was Tropical Cyclone Barry will pass through the region tonight. Showers and thunderstorms this afternoon and tonight will be capable of producing torrential rainfall, with local amounts of 2 to 4 inches and even higher localized amounts potentially occurring in a short period of time. This could lead to flash flooding. * The risk of flash flooding is highest in urbanized and low- lying areas. Rapid rises on small creeks and streams are possible. 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. && $$
904 WGUS61 KPHI 180248 FFAPHI Flood Watch National Weather Service Mount Holly NJ 1048 PM EDT Wed Jul 17 2019 DEZ001-MDZ008-NJZ001-007>010-012-013-015>019-PAZ054-055-060>062- 070-071-101>106-180400- /O.CAN.KPHI.FF.A.0009.000000T0000Z-190718T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset- Middlesex-Western Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton- Delaware-Philadelphia-Western Chester-Eastern Chester- Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Wilmington, Elkton, Newton, Washington, Morristown, Flemington, Somerville, New Brunswick, Freehold, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, Easton, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 1048 PM EDT Wed Jul 17 2019 ...FLASH FLOOD WATCH IS CANCELLED... The potential for heavy rain has come to an end. As a result, the Flash Flood Watch for northern Delaware, extreme northeastern Maryland, and parts of New Jersey and eastern Pennsylvania has been cancelled. $$ Iovino
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 9:15 PM EDT | Special Weather Statement | PHI | Philadelphia | 45 min |
| Jul 17, 1:26 PM EDT | Special Weather Statement | PHI | Pike | 34 min |
| Jul 17, 1:50 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 80 min |
| Jul 17, 2:05 PM EDT | Special Weather Statement | PHI | Lehigh | 25 min |
| Jul 17, 3:14 PM EDT | Excessive Heat Watch | PHI | Berks, Bucks, Carbon, Chester, Lehigh, Monroe and 2 more | 24 hr |
| Jul 17, 5:05 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 40 min |
| Jul 17, 5:14 PM EDT | Special Weather Statement | PHI | Lehigh | 46 min |
| Jul 17, 5:44 PM EDT | Special Weather Statement | PHI | Monroe | 46 min |
| Jul 17, 5:46 PM EDT | Areal Flood Advisory | PHI | Monroe | 119 min |
| Jul 17, 5:49 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 41 min |
| Jul 17, 6:24 PM EDT | Special Weather Statement | PHI | Berks | 51 min |
| Jul 17, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 40 min |
| Jul 17, 6:51 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 54 min |
| Jul 17, 6:52 PM EDT | Areal Flood Advisory | PHI | Berks | 113 min |
| Jul 17, 7:06 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 17, 7:15 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery | 45 min |
| Jul 17, 7:21 PM EDT | Flash Flood Warning | PHI | Chester | 97 min |
| Jul 17, 7:31 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 44 min |
| Jul 17, 7:36 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Montgomery | 3 hr |
| Jul 17, 7:44 PM EDT | Special Weather Statement | PHI | Lehigh | 31 min |
| Jul 17, 7:56 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery, Philadelphia | 64 min |
| Jul 17, 3:50 AM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 17 hr |
| Jul 17, 1:57 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 32 min |
| Jul 17, 2:21 PM EDT | Special Weather Statement | PHI | Warren | 24 min |
| Jul 17, 2:28 PM EDT | Special Weather Statement | PHI | Sussex | 32 min |
| Jul 17, 2:44 PM EDT | Special Weather Statement | PHI | Sussex | 31 min |
| Jul 17, 6:22 PM EDT | Special Weather Statement | PHI | Sussex | 38 min |
| Jul 17, 6:39 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 51 min |
| Jul 17, 7:16 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jul 17, 7:27 PM EDT | Special Weather Statement | PHI | Hunterdon, Morris | 48 min |
| Jul 17, 7:44 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset | 3 hr |
| Jul 17, 7:44 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland, Gloucester, Salem | 46 min |
| Jul 17, 6:44 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 46 min |
| Jul 17, 7:17 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 43 min |
Nearby
Flash Flood Watches in New Jersey, 2019Flash Flood Watches in Pennsylvania, 2019Flash Flood Watches in Delaware, 2019Every flash flood watch in 2019
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.