Alert archive / New Jersey / Flash Flood Watches in 2017
Flash Flood Watch 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jul 14, 2017, 11:40 AM EDT for 4 states. It took effect at Jul 14, 2017, 2:00 PM EDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 14, 2017, 11:40 AM EDT (15:40 UTC)
- In effect from
- Jul 14, 2017, 2:00 PM EDT
- Expired
- Jul 14, 2017, 10:32 PM EDT
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties Kent County, DE, New Castle County, DE, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Atlantic County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Berks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Dover AFB radar (KDOX), 89 km from the middle of the area, began a volume at 15:41 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 3.7 hours before the alert went out and 185 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
- 403 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 1367 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
001 WGUS61 KPHI 141540 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 1140 AM EDT Fri Jul 14 2017 DEZ001-002-MDZ008-012-015-NJZ016>018-021>025-PAZ060-070-071- 101>104-142345- /O.NEW.KPHI.FF.A.0003.170714T1800Z-170715T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Cecil-Kent MD-Queen Annes-Salem-Gloucester-Camden- Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May- Coastal Atlantic-Berks-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery- Including the cities of Wilmington, Dover, Elkton, Chestertown, Centreville, Pennsville, Glassboro, Camden, Cherry Hill, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Reading, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, and Lansdale 1140 AM EDT Fri Jul 14 2017 ...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING... The National Weather Service in Mount Holly has issued a * Flash Flood Watch for portions of southeastern Pennsylvania, southern New Jersey, eastern Maryland and Delaware. * Until midnight EDT tonight. * Showers and thunderstorms that develop this afternoon will contain torrential downpours. There is a potential for some locations to see multiple rounds of storms through this evening. Some locations could receive rainfall amounts of 2 to 4 inches in just a short period, which could produce flash flooding. * Flash flooding of creeks, streams and roadways will be possible, especially in urban and poor drainage areas. Additionally, areas in Berks and Montgomery Counties in Pennsylvania and in far southern New Jersey that received heavy rainfall since yesterday afternoon will be susceptible to flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ JRK
3 follow-up statements
892 WGUS61 KPHI 142141 FFAPHI Flood Watch National Weather Service Mount Holly NJ 541 PM EDT Fri Jul 14 2017 NJZ018-PAZ060-071-103-104-142245- /O.CAN.KPHI.FF.A.0003.000000T0000Z-170715T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Camden-Berks-Philadelphia-Western Montgomery-Eastern Montgomery- Including the cities of Camden, Cherry Hill, Reading, Philadelphia, Collegeville, Pottstown, Norristown, and Lansdale 541 PM EDT Fri Jul 14 2017 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of southern New Jersey and Pennsylvania has been cancelled. The threat of heavy rainfall and flash flooding for this evening has shifted south of Reading and Philadelphia. $$ DEZ001-002-MDZ008-012-015-NJZ016-017-021>025-PAZ070-101-102- 150400- /O.CON.KPHI.FF.A.0003.000000T0000Z-170715T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Kent-Cecil-Kent MD-Queen Annes-Salem-Gloucester- Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May- Coastal Atlantic-Delaware-Western Chester-Eastern Chester- Including the cities of Wilmington, Dover, Elkton, Chestertown, Centreville, Pennsville, Glassboro, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Media, Honey Brook, Oxford, West Chester, and Kennett Square 541 PM EDT Fri Jul 14 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... The Flash Flood Watch continues for * Portions of far southeastern Pennsylvania, southern New Jersey, eastern Maryland and Delaware. * Until midnight EDT tonight * A line of showers and thunderstorms containing torrential downpours will continue to push southeastward through eastern Maryland, central and southern Delaware and far southern New Jersey during the early evening. Rainfall amounts of 2 to 3 inches in less than an hour are occuring with these storms, which could lead to flash flooding. * Additional storms developing behind this line may move back into locations that already saw heavy rainfall this afternoon in far southeastern Pennsylvania, northeastern Maryland and northern Delaware later 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. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
385 WGUS61 KPHI 150122 FFAPHI Flood Watch National Weather Service Mount Holly NJ 922 PM EDT Fri Jul 14 2017 DEZ002-NJZ016-017-021>025-150230- /O.CAN.KPHI.FF.A.0003.000000T0000Z-170715T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Kent-Salem-Gloucester-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic- Including the cities of Dover, Pennsville, Glassboro, Millville, Hammonton, Cape May Court House, Ocean City, and Atlantic City 922 PM EDT Fri Jul 14 2017 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of central Delaware and southern New Jersey has been cancelled. $$ DEZ001-MDZ008-012-015-PAZ070-101-102-150400- /O.CON.KPHI.FF.A.0003.000000T0000Z-170715T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Kent MD-Queen Annes-Delaware-Western Chester- Eastern Chester- Including the cities of Wilmington, Elkton, Chestertown, Centreville, Media, Honey Brook, Oxford, West Chester, and Kennett Square 922 PM EDT Fri Jul 14 2017 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... The Flash Flood Watch continues for * Portions of northern Delaware, northeast Maryland, and southeast Pennsylvania, including the following areas, in northern Delaware, New Castle. In northeast Maryland, Cecil, Kent MD, and Queen Annes. In southeast Pennsylvania, Delaware, Eastern Chester, and Western Chester. * Until midnight EDT tonight * Scattered thunderstorms with torrential rainfall in south central Pennsylvania this evening may still arrive toward midnight in parts of our area. However, the chance of any flash flood producing rainfall in our area is lessening. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
875 WGUS61 KPHI 150232 FFAPHI Flood Watch National Weather Service Mount Holly NJ 1032 PM EDT Fri Jul 14 2017 DEZ001-MDZ008-012-015-PAZ070-101-102-150345- /O.CAN.KPHI.FF.A.0003.000000T0000Z-170715T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Kent MD-Queen Annes-Delaware-Western Chester- Eastern Chester- Including the cities of Wilmington, Elkton, Chestertown, Centreville, Media, Honey Brook, Oxford, West Chester, and Kennett Square 1032 PM EDT Fri Jul 14 2017 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of northern Delaware, northeast Maryland, and southeast Pennsylvania has been cancelled. The threat of any additional flash flooding continues to decrease. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 8:17 PM EDT | Special Weather Statement | PHI | Montgomery, Philadelphia | 43 min |
| Jul 14, 7:21 AM EDT | Areal Flood Advisory | PHI | Carbon, Monroe, Northampton | 3 hr |
| Jul 14, 12:30 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Montgomery, Northampton | 4 hr |
| Jul 14, 1:58 PM EDT | Special Weather Statement | PHI | Chester | 62 min |
| Jul 14, 2:14 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jul 14, 2:31 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 59 min |
| Jul 14, 2:53 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jul 14, 2:57 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery | 3 hr |
| Jul 14, 3:18 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 12 min |
| Jul 14, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 67 min |
| Jul 13, 10:03 PM EDT | Special Weather Statement | PHI | Caroline | 27 min |
| Jul 13, 10:15 PM EDT | Areal Flood Advisory | PHI | Caroline, Talbot | 4 hr |
| Jul 14, 9:23 AM EDT | Special Weather Statement | PHI | Cecil | 37 min |
| Jul 14, 12:06 PM EDT | Heat Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 7 hr |
| Jul 14, 2:46 PM EDT | Areal Flood Advisory | PHI | Cecil | 3 hr |
| Jul 14, 3:10 PM EDT | Flash Flood Warning | PHI | Cecil | 2 hr |
| Jul 14, 3:52 PM EDT | Flash Flood Warning | PHI | Talbot | 53 min |
| Jul 14, 3:57 PM EDT | Flash Flood Warning | PHI | Cecil, Kent | 2 hr |
| Jul 14, 4:00 PM EDT | Special Weather Statement | PHI | Caroline | 45 min |
| Jul 14, 4:05 PM EDT | Special Weather Statement | PHI | Kent | 40 min |
| Jul 14, 4:48 PM EDT | Special Weather Statement | PHI | Queen Anne's | 27 min |
| Jul 14, 4:59 PM EDT | Flash Flood Warning | PHI | Queen Anne's | 4 hr |
| Jul 14, 5:27 PM EDT | Special Weather Statement | PHI | Queen Anne's | 63 min |
| Jul 14, 5:40 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 65 min |
| Jul 14, 5:54 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 51 min |
| Jul 14, 5:58 PM EDT | Flash Flood Warning | PHI | Talbot | 3 hr |
| Jul 14, 6:10 PM EDT | Flash Flood Warning | PHI | Caroline | 3 hr |
| Jul 14, 6:20 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 40 min |
| Jul 13, 8:26 PM EDT | Special Weather Statement | PHI | Cape May | 34 min |
| Jul 13, 8:27 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 4 hr |
| Jul 13, 8:49 PM EDT | Special Weather Statement | PHI | Cumberland | 26 min |
| Jul 13, 8:51 PM EDT | Special Weather Statement | PHI | Atlantic | 54 min |
| Jul 13, 9:07 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland, Gloucester, Salem | 53 min |
| Jul 13, 9:46 PM EDT | Special Weather Statement | PHI | Atlantic | 14 min |
| Jul 13, 9:50 PM EDT | Special Marine Warning | PHI | 115 min | |
| Jul 13, 9:57 PM EDT | Special Weather Statement | PHI | Cape May | 33 min |
| Jul 13, 10:42 PM EDT | Special Marine Warning | PHI | 93 min | |
| Jul 14, 3:07 PM EDT | Special Marine Warning | PHI | 53 min | |
| Jul 14, 3:25 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Cumberland, Gloucester, Ocean, Salem | 4 hr |
| Jul 14, 3:34 PM EDT | Flash Flood Warning | PHI | Gloucester, Salem | 3 hr |
| Jul 14, 3:35 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cumberland, Gloucester | 55 min |
| Jul 14, 3:43 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Salem | 47 min |
| Jul 14, 3:47 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Ocean | 3 hr |
| Jul 14, 3:54 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 66 min |
| Jul 14, 4:12 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May | 63 min |
| Jul 14, 4:13 PM EDT | Flash Flood Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 3 hr |
| Jul 14, 4:18 PM EDT | Special Marine Warning | PHI | 57 min | |
| Jul 14, 4:25 PM EDT | Special Marine Warning | PHI | 95 min | |
| Jul 14, 4:44 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland, Gloucester, Salem | 61 min |
| Jul 14, 4:54 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 14, 5:47 PM EDT | Special Weather Statement | PHI | Cape May | 13 min |
| Jul 14, 5:53 PM EDT | Special Marine Warning | PHI | 52 min | |
| Jul 14, 6:32 PM EDT | Special Marine Warning | PHI | 88 min | |
| Jul 14, 7:08 PM EDT | Special Marine Warning | PHI | 97 min | |
| Jul 14, 7:28 PM EDT | Areal Flood Advisory | PHI | Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem | 3 hr |
| Jul 13, 8:09 PM EDT | Special Weather Statement | PHI | Kent | 36 min |
| Jul 13, 8:29 PM EDT | Special Weather Statement | PHI | Kent | 31 min |
| Jul 13, 10:39 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 51 min |
| Jul 14, 9:02 AM EDT | Special Weather Statement | PHI | New Castle | 28 min |
| Jul 14, 5:14 PM EDT | Areal Flood Advisory | PHI | Kent | 3 hr |
| Jul 14, 5:24 PM EDT | Special Weather Statement | PHI | Sussex | 36 min |
| Jul 14, 5:30 PM EDT | River Flood Warning | PHI | New Castle | 7 hr |
| Jul 14, 5:51 PM EDT | Special Weather Statement | PHI | Sussex | 39 min |
| Jul 14, 6:32 PM EDT | Areal Flood Advisory | PHI | Sussex | 4 hr |
| Jul 14, 6:48 PM EDT | Special Weather Statement | PHI | Sussex | 42 min |
| Jul 14, 7:15 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 60 min |
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.