Alert archive / New Jersey / Flash Flood Watches in 2018
Flash Flood Watch 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jun 2, 2018, 3:26 AM EDT for 4 states. It took effect at Jun 2, 2018, 11:00 AM EDT. It was in force for 16 hr.
The area
The counties it named.
The facts
- Issued
- Jun 2, 2018, 3:26 AM EDT (07:26 UTC)
- In effect from
- Jun 2, 2018, 11:00 AM EDT
- Expired
- Jun 3, 2018, 3:20 AM EDT
- In force
- 16 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
All 21 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Mercer County, NJ, Salem County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Dover AFB radar (KDOX), 80 km from the middle of the area, began a volume at 07:26 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 7.4 hours before the alert went out and 179 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
- 57 J/kg
- Mixed-layer CIN
- -118 J/kg
- Mixed-layer LCL
- 1243 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
943 WGUS61 KPHI 020726 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 326 AM EDT Sat Jun 2 2018 DEZ001>004-MDZ008-012-015-019-020-NJZ015>019-021>025-027-PAZ070- 071-101>106-022200- /O.NEW.KPHI.FF.A.0004.180602T1500Z-180603T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Wilmington, Dover, Georgetown, Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 326 AM EDT Sat Jun 2 2018 ...FLASH FLOOD WATCH IN EFFECT FROM 11 AM EDT THIS MORNING THROUGH LATE TONIGHT... The National Weather Service in Mount Holly has issued a * Flash Flood Watch for portions of Delaware, northeast Maryland, New Jersey, and southeast Pennsylvania, including the following areas, in Delaware, Delaware Beaches, Inland Sussex, Kent, and New Castle. In northeast Maryland, Caroline, Cecil, Kent MD, Queen Annes, and Talbot. In New Jersey, Atlantic, Atlantic Coastal Cape May, Camden, Cape May, Coastal Atlantic, Cumberland, Gloucester, Mercer, Northwestern Burlington, Salem, and Southeastern Burlington. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and Western Montgomery. * From 11 AM EDT this morning through late tonight * Showers and thunderstorms are expected to develop by early this afternoon and continue through tonight across far southeast Pennsylvania, central and southern New Jersey, and the Delmarva Peninsula. These showers and storms will have the potential to produce torrential downpours, with localized totals of one to three inches in a short period of time. In addition, storms may be slow to move or may reform over the same areas. This may lead to flash flooding in the areas of heaviest rainfall today and tonight. * Excessive rainfall within a short period of time can lead to rapidly rising waters and flash flooding, particularly in urban areas and along small creeks and streams. 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
407 WGUS61 KPHI 021933 FFAPHI Flood Watch National Weather Service Mount Holly NJ 333 PM EDT Sat Jun 2 2018 DEZ001>004-MDZ008-012-015-019-020-NJZ015>019-021>025-027-PAZ070- 071-101>106-031000- /O.CON.KPHI.FF.A.0004.000000T0000Z-180603T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Wilmington, Dover, Georgetown, Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 333 PM EDT Sat Jun 2 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... The Flash Flood Watch continues for * Portions of Delaware, northeast Maryland, New Jersey, and southeast Pennsylvania, including the following areas, in Delaware, Delaware Beaches, Inland Sussex, Kent, and New Castle. In northeast Maryland, Caroline, Cecil, Kent MD, Queen Annes, and Talbot. In New Jersey, Atlantic, Atlantic Coastal Cape May, Camden, Cape May, Coastal Atlantic, Cumberland, Gloucester, Mercer, Northwestern Burlington, Salem, and Southeastern Burlington. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and Western Montgomery. * Through late tonight * Showers and thunderstorms are developing across the area this afternoon and will continue through tonight across far southeast Pennsylvania, central and southern New Jersey, and the Delmarva Peninsula. These showers and storms will have the potential to produce torrential downpours, with localized totals of one to three inches in a short period of time. In addition, storms may be slow to move or may reform over the same areas. This may lead to flash flooding in the areas of heaviest rainfall today and tonight. * Excessive rainfall within a short period of time can lead to rapidly rising waters and flash flooding, particularly in urban areas and along small creeks and streams. 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. && $$
788 WGUS61 KPHI 030129 FFAPHI Flood Watch National Weather Service Mount Holly NJ 929 PM EDT Sat Jun 2 2018 DEZ001>004-MDZ008-012-015-019-020-NJZ015>019-021>025-027-PAZ070- 071-101>106-030930- /O.CON.KPHI.FF.A.0004.000000T0000Z-180603T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Wilmington, Dover, Georgetown, Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 929 PM EDT Sat Jun 2 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 6 AM EDT SUNDAY... The Flash Flood Watch continues for * Portions of Delaware, northeast Maryland, New Jersey, and southeast Pennsylvania, including the following areas, in Delaware, Delaware Beaches, Inland Sussex, Kent, and New Castle. In northeast Maryland, Caroline, Cecil, Kent MD, Queen Annes, and Talbot. In New Jersey, Atlantic, Atlantic Coastal Cape May, Camden, Cape May, Coastal Atlantic, Cumberland, Gloucester, Mercer, Northwestern Burlington, Salem, and Southeastern Burlington. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and Western Montgomery. * Until 6 AM EDT Sunday * Showers and thunderstorms will continue to affect the region through the late evening into the overnight and may continue to produce very heavy downpours. A quick one to two inches of rainfall is possible with some of these storms, especially through late this evening. The potential still exists for isolated flash flooding with the risk decreasing through the overnight. * Excessive rainfall within a short period of time can lead to rapidly rising waters and flash flooding, particularly in urban areas and along small creeks and streams. 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. && $$
000 WGUS61 KPHI 030720 FFAPHI Flood Watch National Weather Service Mount Holly NJ 320 AM EDT Sun Jun 3 2018 DEZ001>004-MDZ008-012-015-019-020-NJZ015>019-021>025-027-PAZ070- 071-101>106-030830- /O.CAN.KPHI.FF.A.0004.000000T0000Z-180603T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Wilmington, Dover, Georgetown, Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 320 AM EDT Sun Jun 3 2018 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of Delaware, northeastern Maryland, New Jersey and southeastern Pennsylvania has been cancelled. While brief downpours remain possible today, widespread flooding is not anticipated. However, there may be some localized flooding in areas of poor drainage. $$ Iovino
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 2, 1:36 PM EDT | Special Weather Statement | PHI | Sussex | 24 min |
| Jun 2, 3:37 AM EDT | Gale Warning | PHI | 48 hr | |
| Jun 2, 3:37 AM EDT | Small Craft Advisory | PHI | 30 hr | |
| Jun 2, 1:48 PM EDT | Special Weather Statement | PHI | Middlesex | 42 min |
| Jun 2, 4:30 PM EDT | Special Weather Statement | PHI | Burlington | 15 min |
| Jun 2, 5:19 PM EDT | Special Weather Statement | PHI | Gloucester | 41 min |
| Jun 2, 5:44 PM EDT | Special Weather Statement | PHI | Hunterdon | 31 min |
| Jun 2, 5:56 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Gloucester | 92 min |
| Jun 2, 6:44 PM EDT | Areal Flood Advisory | PHI | Salem | 3 hr |
| Jun 2, 12:42 AM EDT | Special Weather Statement | PHI | Cecil | 63 min |
| Jun 2, 2:15 PM EDT | Areal Flood Advisory | PHI | Cecil | 3 hr |
| Jun 2, 5:11 PM EDT | Areal Flood Advisory | PHI | Chester | 2 hr |
| Jun 2, 5:29 PM EDT | Special Weather Statement | PHI | Lehigh | 31 min |
| Jun 2, 5:42 PM EDT | Special Weather Statement | PHI | Montgomery | 33 min |
| Jun 2, 6:13 PM EDT | Special Weather Statement | PHI | Chester | 47 min |
Nearby
Flash Flood Watches in New Jersey, 2018Flash Flood Watches in Maryland, 2018Flash Flood Watches in Pennsylvania, 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.