Alert archive / New Jersey / Flash Flood Watches in 2019
Flash Flood Watch 13, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Aug 12, 2019, 3:34 PM EDT for 8 counties in Pennsylvania; 11 counties in New Jersey. It took effect at Aug 13, 2019, 2:00 PM EDT. It was in force for 46 min.
The area
The counties it named.
The facts
- Issued
- Aug 12, 2019, 3:34 PM EDT (19:34 UTC)
- In effect from
- Aug 13, 2019, 2:00 PM EDT
- Expired
- Aug 13, 2019, 2:46 PM EDT
- In force
- 46 min
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Somerset 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), 62 km from the middle of the area, began a volume at 19:38 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 12:00Z, 7.6 hours before the alert went out and 191 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1732 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
648 WGUS61 KPHI 121934 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 334 PM EDT Mon Aug 12 2019 NJZ007>010-012>015-017>020-026-027-PAZ060>062-070-071-101>106- 131000- /O.NEW.KPHI.FF.A.0013.190813T1800Z-190814T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Warren-Morris-Hunterdon-Somerset-Middlesex-Western Monmouth- Eastern Monmouth-Mercer-Gloucester-Camden-Northwestern Burlington- Ocean-Coastal Ocean-Southeastern Burlington-Berks-Lehigh- Northampton-Delaware-Philadelphia-Western Chester-Eastern Chester- Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Washington, Morristown, Flemington, Somerville, New Brunswick, Freehold, Sandy Hook, Trenton, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Long Beach Island, Wharton State Forest, Reading, Allentown, Bethlehem, Easton, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 334 PM EDT Mon Aug 12 2019 ...FLASH FLOOD WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING... The National Weather Service in Mount Holly has issued a * Flash Flood Watch for southeastern Pennsylvania and much of New Jersey. * From Tuesday afternoon through Tuesday evening * Showers and thunderstorms will begin to develop around midday and continue through the afternoon and evening hours. Periods of heavy rain can be expected with areas of 1 to 2 inches, with local amounts up to 5 inches possible. These rainfall totals may occur in a short amount of time, and 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. && $$ CMS
3 follow-up statements
043 WGUS61 KPHI 130725 FFAPHI Flood Watch National Weather Service Mount Holly NJ 325 AM EDT Tue Aug 13 2019 NJZ007>010-PAZ060>062-130830- /O.CAN.KPHI.FF.A.0013.190813T1800Z-190814T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Warren-Morris-Hunterdon-Somerset-Berks-Lehigh-Northampton- Including the cities of Washington, Morristown, Flemington, Somerville, Reading, Allentown, Bethlehem, and Easton 325 AM EDT Tue Aug 13 2019 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of northern New Jersey and east central Pennsylvania has been cancelled. The threat for the heaviest rainfall has shifted farther south into central and southern New Jersey and far southeast Pennsylvania. $$ NJZ012>015-017>020-026-027-PAZ070-071-101>106-131530- /O.CON.KPHI.FF.A.0013.190813T1800Z-190814T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Coastal Ocean- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of New Brunswick, Freehold, Sandy Hook, Trenton, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Long Beach Island, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 325 AM EDT Tue Aug 13 2019 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... The Flash Flood Watch continues for * Portions of New Jersey and southeast Pennsylvania, including the following areas, in New Jersey, Camden, Coastal Ocean, Eastern Monmouth, Gloucester, Mercer, Middlesex, Northwestern Burlington, Ocean, Southeastern Burlington, and Western Monmouth. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and Western Montgomery. * From 2 PM EDT this afternoon through this evening * Showers and thunderstorms will begin to develop around midday and continue through the afternoon and evening hours. Periods of heavy rain can be expected with areas of 1 to 2 inches, with local amounts up to 3 inches possible. These rainfall totals may occur in a short amount of time, and 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. && $$ Staarmann
172 WGUS61 KPHI 131626 FFAPHI Flood Watch National Weather Service Mount Holly NJ 1226 PM EDT Tue Aug 13 2019 NJZ012>015-017>020-026-027-PAZ070-071-101>106-140130- /O.CON.KPHI.FF.A.0013.190813T1800Z-190814T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Coastal Ocean- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of New Brunswick, Freehold, Sandy Hook, Trenton, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Long Beach Island, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 1226 PM EDT Tue Aug 13 2019 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... The Flash Flood Watch continues for * Portions of New Jersey and southeast Pennsylvania, including the following areas, in New Jersey, Camden, Coastal Ocean, Eastern Monmouth, Gloucester, Mercer, Middlesex, Northwestern Burlington, Ocean, Southeastern Burlington, and Western Monmouth. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and Western Montgomery. * Until midnight EDT tonight * Showers with embedded thunderstorms can be expected across the area this afternoon. Any storms will be capable of producing heavy rain which could lead to localized flash flooding if repeated storms it the same area. * 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. && $$ Fitzsimmons
543 WGUS61 KPHI 131846 FFAPHI Flood Watch National Weather Service Mount Holly NJ 246 PM EDT Tue Aug 13 2019 NJZ012>015-017>020-026-027-PAZ070-071-101>106-132000- /O.CAN.KPHI.FF.A.0013.000000T0000Z-190814T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Gloucester- Camden-Northwestern Burlington-Ocean-Coastal Ocean- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of New Brunswick, Freehold, Sandy Hook, Trenton, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Long Beach Island, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 246 PM EDT Tue Aug 13 2019 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of New Jersey and southeast Pennsylvania has been cancelled. Showers with embedded thunderstorms could still produce locally heavy rain this afternoon into this evening but flash flooding is not expected. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 3:46 PM EDT | Small Craft Advisory | PHI | 29 hr |
Nearby
Flash Flood Watches in New Jersey, 2019Flash Flood Watches in Pennsylvania, 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.