Alert archive / New Jersey / Flash Flood Watches in 2018
Flash Flood Watch 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jun 10, 2018, 3:48 AM EDT for 4 states. It took effect at Jun 10, 2018, 6:00 PM EDT. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Jun 10, 2018, 3:48 AM EDT (07:48 UTC)
- In effect from
- Jun 10, 2018, 6:00 PM EDT
- Expired
- Jun 11, 2018, 8:00 AM EDT
- In force
- 14 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
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, Ocean County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Dover AFB radar (KDOX), 73 km from the middle of the area, began a volume at 07:48 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, 7.8 hours before the alert went out and 173 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
- 112 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 751 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
427 WGUS61 KPHI 100748 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 348 AM EDT Sun Jun 10 2018 DEZ001>004-MDZ008-012-015-019-020-NJZ016>027-PAZ070-071-101>104- 101600- /O.NEW.KPHI.FF.A.0005.180610T2200Z-180611T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery- Including the cities of Wilmington, Dover, Georgetown, Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Long Beach Island, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, and Lansdale 348 AM EDT Sun Jun 10 2018 ...FLASH FLOOD WATCH IN EFFECT FROM THIS EVENING THROUGH MONDAY MORNING... The National Weather Service in Mount Holly has issued a * Flash Flood Watch for portions of Delaware, northeast Maryland, southern 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 southern New Jersey, Atlantic, Atlantic Coastal Cape May, Camden, Cape May, Coastal Atlantic, Coastal Ocean, Cumberland, Gloucester, Northwestern Burlington, Ocean, Salem, and Southeastern Burlington. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Philadelphia, Western Chester, and Western Montgomery. * From this evening through Monday morning * Light to moderate rainfall will develop across the area today. The rainfall is expected to become heavier later this evening into the overnight hours. One to two inches of rain are expected occur across portions of the area. Scattered thunderstorms may also occur and could be slow moving which could lead to locally higher amounts. * 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. && $$
4 follow-up statements
614 WGUS61 KPHI 101457 FFAPHI Flood Watch National Weather Service Mount Holly NJ 1057 AM EDT Sun Jun 10 2018 DEZ001>004-MDZ008-012-015-019-020-NJZ016>027-PAZ070-071-101>104- 102300- /O.CON.KPHI.FF.A.0005.180610T2200Z-180611T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery- Including the cities of Wilmington, Dover, Georgetown, Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Long Beach Island, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, and Lansdale 1057 AM EDT Sun Jun 10 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH MONDAY MORNING... The Flash Flood Watch continues for * Portions of Delaware, northeast Maryland, southern 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 southern New Jersey, Atlantic, Atlantic Coastal Cape May, Camden, Cape May, Coastal Atlantic, Coastal Ocean, Cumberland, Gloucester, Northwestern Burlington, Ocean, Salem, and Southeastern Burlington. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Philadelphia, Western Chester, and Western Montgomery. * From 6 PM EDT this evening through Monday morning. * Light to moderate rainfall will develop across the area this afternoon. The rainfall is expected to become heavier later this evening into the overnight hours. A total of 1 to 2 inches of rain are expected across portions of the area. Some thunderstorms may also occur and could be slow moving which could lead to locally higher amounts. * 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. && $$
506 WGUS61 KPHI 101921 FFAPHI Flood Watch National Weather Service Mount Holly NJ 321 PM EDT Sun Jun 10 2018 DEZ001>004-MDZ008-012-015-019-020-NJZ016>027-PAZ070-071-101>104- 110900- /O.CON.KPHI.FF.A.0005.180610T2200Z-180611T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery- Including the cities of Wilmington, Dover, Georgetown, Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Long Beach Island, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, and Lansdale 321 PM EDT Sun Jun 10 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY MORNING... The Flash Flood Watch continues for * Portions of Delaware, northeast Maryland, southern 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 southern New Jersey, Atlantic, Atlantic Coastal Cape May, Camden, Cape May, Coastal Atlantic, Coastal Ocean, Cumberland, Gloucester, Northwestern Burlington, Ocean, Salem, and Southeastern Burlington. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, Philadelphia, Western Chester, and Western Montgomery. * Through Monday morning. * Periods of rain is expected into Monday morning, some of which will be heavy at times. A total of 1 to 2 inches of rain is expected across much of the watch area. Some thunderstorms may occur through this evening mainly across Delmarva which could lead to locally higher amounts. * Excessive rainfall within a short period of time can lead to rapidly rising water 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 may 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. && $$
623 WGUS61 KPHI 110836 FFAPHI Flood Watch National Weather Service Mount Holly NJ 436 AM EDT Mon Jun 11 2018 NJZ017>020-026-027-PAZ070-071-101>104-110945- /O.CAN.KPHI.FF.A.0005.000000T0000Z-180611T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Gloucester-Camden-Northwestern Burlington-Ocean-Coastal Ocean- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery- Including the cities of Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Long Beach Island, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, and Lansdale 436 AM EDT Mon Jun 11 2018 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of southern New Jersey and southeast Pennsylvania has been cancelled. The heaviest rains have ended, and the threat of flash flooding has diminished. Areal and small-stream flooding continues near the Philadelphia metropolitan area. Continue to use caution traveling this morning, and heed any remaining road closures. $$ DEZ001>004-MDZ008-012-015-019-020-NJZ016-021>025-111200- /O.CON.KPHI.FF.A.0005.000000T0000Z-180611T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Salem-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic- Including the cities of Wilmington, Dover, Georgetown, Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton, Pennsville, Millville, Hammonton, Cape May Court House, Ocean City, and Atlantic City 436 AM EDT Mon Jun 11 2018 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... The Flash Flood Watch continues for * Portions of Delaware, northeast Maryland, and southern New Jersey, 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 southern New Jersey, Atlantic, Atlantic Coastal Cape May, Cape May, Coastal Atlantic, Cumberland, and Salem. * Until 8 AM EDT this morning * Though the threat of flash flooding is diminishing, periods of rain are expected through this morning, some of which will be heavy at times. An additional inch or two of rain is possible in some spots. With antecedent wet conditions across the area, additional heavy rainfall may lead to flash flooding. * Excessive rainfall within a short period of time can lead to rapidly rising water 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 may 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. && $$ CMS
368 WGUS61 KPHI 111207 FFAPHI Flood Watch National Weather Service Mount Holly NJ 807 AM EDT Mon Jun 11 2018 DEZ001>004-MDZ008-012-015-019-020-NJZ016-021>025-111315- /O.EXP.KPHI.FF.A.0005.000000T0000Z-180611T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD- Queen Annes-Talbot-Caroline-Salem-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic- Including the cities of Wilmington, Dover, Georgetown, Rehoboth Beach, Elkton, Chestertown, Centreville, Easton, Denton, Pennsville, Millville, Hammonton, Cape May Court House, Ocean City, and Atlantic City 807 AM EDT Mon Jun 11 2018 ...FLASH FLOOD WATCH HAS EXPIRED... The Flash Flood Watch has been allowed to expire as rain continues to taper off from north to south and no additional flash flooding is expected. However areas of standing water with lingering flooding in low lying and poor drainage areas continues in spots due to the heavy rainfall that fell overnight. $$ Fitzsimmons
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 7:38 PM EDT | Special Weather Statement | PHI | Montgomery | 52 min |
| Jun 10, 4:01 AM EDT | Small Craft Advisory | PHI | 50 hr | |
| Jun 10, 3:50 PM EDT | Special Weather Statement | PHI | Caroline | 40 min |
| Jun 10, 5:00 PM EDT | Flash Flood Warning | PHI | Caroline | 108 min |
| Jun 10, 7:45 PM EDT | Special Weather Statement | PHI | Caroline, Queen Anne's, Talbot | 60 min |
| Jun 10, 4:45 PM EDT | Special Weather Statement | PHI | Sussex | 30 min |
| Jun 10, 6:45 PM EDT | Areal Flood Advisory | PHI | Kent | 3 hr |
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.