Alert archive / New Jersey / Areal Flood Advisories in 2018
Areal Flood Advisory 212, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Aug 11, 2018, 6:31 AM EDT for 5 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Aug 11, 2018, 6:31 AM EDT (10:31 UTC)
- Expired
- Aug 11, 2018, 1:30 PM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 68 km from the middle of the area, began a volume at 10:31 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, 10.5 hours before the alert went out and 161 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
- 155 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1448 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this areal flood advisory went out at Aug 11, 6:23 AM EDT, 8 minutes earlier.
Area forecast discussion, Aug 11, 6:23 AM EDT, 8 minutes before
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</html>Hazardous weather outlook, Aug 11, 4:33 AM EDT, 1 hour 58 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 433 AM EDT Sat Aug 11 2018 NJZ001-007>010-PAZ054-055-060>062-101>105-120845- Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks-Lehigh- Northampton-Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks- 433 AM EDT Sat Aug 11 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... This Hazardous Weather Outlook is for northern New Jersey, northwest New Jersey, east central Pennsylvania, northeast Pennsylvania and southeast Pennsylvania. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Heavy rain with any showers and thunderstorms could lead to localized flooding Sunday and Monday. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ015-017>019-PAZ070-071-106-120845- Mercer-Gloucester-Camden-Northwestern Burlington-Delaware- Philadelphia-Lower Bucks- 433 AM EDT Sat Aug 11 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... ...COASTAL FLOOD ADVISORY IN EFFECT FROM 1 AM TO 5 AM EDT SUNDAY... This Hazardous Weather Outlook is for central New Jersey, southern New Jersey and southeast Pennsylvania. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Minor tidal flooding is possible around the time of the evening high tide on Sunday. Heavy rain with any showers and thunderstorms could lead to localized flooding Sunday and Monday. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ001-NJZ016-120845- New Castle-Salem- 433 AM EDT Sat Aug 11 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... ...COASTAL FLOOD ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 2 AM EDT SUNDAY... This Hazardous Weather Outlook is for northern Delaware and southern New Jersey. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Minor tidal flooding is possible around the time of the evening high tide on Sunday. Heavy rain with any showers and thunderstorms could lead to localized flooding Sunday and Monday. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. NJZ012>014-120845- Middlesex-Western Monmouth-Eastern Monmouth- 433 AM EDT Sat Aug 11 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... ...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 1 AM EDT SUNDAY... This Hazardous Weather Outlook is for central New Jersey and northern New Jersey. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Minor tidal flooding is possible around the time of the evening high tide on Sunday. Heavy rain with any showers and thunderstorms could lead to localized flooding Sunday and Monday. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ002>004-NJZ020>027-120845- Kent-Inland Sussex-Delaware Beaches-Ocean-Cumberland-Atlantic- Cape May-Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- 433 AM EDT Sat Aug 11 2018 ...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 1 AM EDT SUNDAY... This Hazardous Weather Outlook is for central Delaware, southern Delaware and southern New Jersey. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Coastal Flood Advisory. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Minor tidal flooding is possible around the time of the evening high tide on Sunday. Heavy rain with any showers and thunderstorms could lead to localized flooding Sunday and Monday. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. MDZ008-012-015-019-020-120845- Cecil-Kent MD-Queen Annes-Talbot-Caroline- 433 AM EDT Sat Aug 11 2018 This Hazardous Weather Outlook is for northeast Maryland. .DAY ONE...Today and Tonight. The probability of widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Heavy rain with any showers and thunderstorms could lead to localized flooding Sunday and Monday. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ430-431-450>455-120845- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm- Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm- Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm- Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm- Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm- Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm- 433 AM EDT Sat Aug 11 2018 This Hazardous Weather Outlook is for Atlantic coastal waters and Delaware Bay Waters. .DAY ONE...Today and Tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. CMS
In the hours before
Special weather statement, Aug 11, 2:25 AM EDT, 4 hours 6 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
225 AM EDT SAT AUG 11 2018
PAZ060-110730-
Berks-
225 AM EDT SAT AUG 11 2018
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT BERKS COUNTY...
At 225 AM EDT, radar indicated strong thunderstorms were located
along a line extending from Strausstown to near Mount Joy. Movement
was northeast at 25 mph.
Winds up to 40 mph are possible with these storms.
Locations impacted include...
Reading, Wyomissing, Hamburg, Sinking Spring, Laureldale, Womelsdorf,
Wernersville, Newmanstown, Leesport, Adamstown, Shoemakersville,
Bernville, Strausstown, Lenhartsville, New Morgan, Spring Ridge,
Fairview Hgts, Shillington, West Reading and Mount Penn.
Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4052 7634 4052 7625 4058 7605 4057 7602
4064 7598 4068 7589 4062 7580 4016 7592
4031 7614 4036 7621 4037 7623 4049 7643
TIME...MOT...LOC 0625Z 237DEG 23KT 4047 7620 4016 7649
CMSLocal storm report, Aug 11, 3:18 AM EDT, 3 hours 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
318 AM EDT SAT AUG 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0211 AM COASTAL FLOOD WESTVILLE 39.87N 75.13W
08/11/2018 GLOUCESTER NJ DEPT OF HIGHWAYS
STATE HIGHWAY 47 CLOSED NEAR BROADWAY AVENUE FROM TIDAL
FLOODING OF THE DELAWARE RIVER.
&&
EVENT NUMBER PHI1801228
CMSLocal storm report, Aug 11, 3:22 AM EDT, 3 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
322 AM EDT SAT AUG 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0305 AM COASTAL FLOOD BROOKLAWN 39.88N 75.12W
08/11/2018 CAMDEN NJ DEPT OF HIGHWAYS
U.S. HIGHWAY 130 SOUTHBOUND CLOSED NEAR COUNTY ROAD 551
FROM TIDAL FLOODING OF THE DELAWARE RIVER.
&&
EVENT NUMBER PHI1801229
CMSSpecial weather statement, Aug 11, 3:26 AM EDT, 3 hours 5 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
326 AM EDT SAT AUG 11 2018
PAZ060-110830-
Berks-
326 AM EDT SAT AUG 11 2018
...A STRONG THUNDERSTORM WILL AFFECT BERKS COUNTY...
At 325 AM EDT, a strong thunderstorm was located over Spring Ridge,
or near Reading, moving east at 15 mph.
Winds up to 40 mph are possible with this storm.
Locations impacted include...
Reading, Wyomissing, Birdsboro, Kutztown, Fleetwood, Sinking Spring,
Laureldale, Wernersville, Topton, Leesport, Shoemakersville,
Bernville, Lyons, Lenhartsville, Spring Ridge, Fairview Hgts, Stowe,
Shillington, West Reading and Mount Penn.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4045 7616 4062 7580 4056 7570 4028 7566
4023 7571 4021 7576 4021 7599 4032 7615
TIME...MOT...LOC 0725Z 247DEG 14KT 4037 7601
CMSLocal storm report, Aug 11, 5:55 AM EDT, 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
555 AM EDT SAT AUG 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0553 AM FLASH FLOOD GARFIELD 40.43N 76.04W
08/11/2018 BERKS PA SOCIAL MEDIA
VEHICLE STUCK IN FLOOD WATERS AND A WATER RESCUE IN
PROGRESS AT PLUM CREEK ROAD AND BLOOMSBURG ROAD IN PENN
TWP.
&&
EVENT NUMBER PHI1801230
CMSLocal storm report, Aug 11, 6:21 AM EDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
621 AM EDT SAT AUG 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0618 AM FLOOD 1 WSW WASHINGTON 40.76N 74.99W
08/11/2018 WARREN NJ SOCIAL MEDIA
FLOODING ON WEST WASHINGTON AVENUE IN WASHINGTON BORO.
&&
EVENT NUMBER PHI1801231
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 3:24 AM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Hunterdon and 9 more | 20 hr |
| Aug 11, 4:26 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more | 24 hr |
| Aug 11, 5:27 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Warren | 4 hr |
| Aug 11, 6:06 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Warren | 6 hr |
| Aug 11, 7:16 AM EDT | Flash Flood Warning | PHI | Middlesex, Somerset | 4 hr |
| Aug 11, 10:49 AM EDT | Areal Flood Advisory | PHI | Middlesex, Somerset | 3 hr |
| Aug 11, 11:29 AM EDT | Areal Flood Advisory | PHI | Atlantic | 4 hr |
| Aug 11, 11:46 AM EDT | Special Marine Warning | PHI | 119 min | |
| Aug 11, 11:55 AM EDT | Special Weather Statement | PHI | Burlington | 35 min |
| Aug 11, 12:27 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Ocean | 4 hr |
| Aug 11, 12:39 PM EDT | Special Weather Statement | PHI | Ocean | 36 min |
| Aug 11, 12:55 PM EDT | Special Marine Warning | PHI | 65 min | |
| Aug 11, 1:07 PM EDT | Flash Flood Warning | PHI | Atlantic, Cape May | 4 hr |
| Aug 11, 1:26 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 1:42 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 1:51 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 39 min |
| Aug 11, 2:00 PM EDT | Flash Flood Warning | PHI | Warren | 9 hr |
| Aug 11, 2:05 PM EDT | Special Weather Statement | PHI | Cape May | 25 min |
| Aug 11, 2:06 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester | 3 hr |
| Aug 11, 2:19 PM EDT | Special Marine Warning | PHI | 86 min | |
| Aug 11, 2:20 PM EDT | Areal Flood Advisory | PHI | Cape May, Cumberland | 3 hr |
| Aug 11, 2:30 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Warren | 3 hr |
| Aug 11, 2:46 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 3 hr |
| Aug 11, 2:58 PM EDT | Special Weather Statement | PHI | Cumberland | 47 min |
| Aug 11, 3:06 PM EDT | Flash Flood Warning | PHI | Warren | 4 hr |
| Aug 11, 3:13 PM EDT | Special Weather Statement | PHI | Hunterdon | 47 min |
| Aug 11, 3:23 PM EDT | Areal Flood Advisory | PHI | Morris, Sussex | 3 hr |
| Aug 11, 3:24 PM EDT | Special Weather Statement | PHI | Atlantic, Cumberland | 51 min |
| Aug 11, 3:32 PM EDT | Flash Flood Warning | PHI | Atlantic | 3 hr |
| Aug 11, 3:47 PM EDT | Flash Flood Warning | PHI | Morris | 3 hr |
| Aug 11, 4:11 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 4:28 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 5:00 PM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 3 hr |
| Aug 11, 5:26 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Warren | 4 hr |
| Aug 11, 5:36 PM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 4 hr |
| Aug 11, 6:11 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Aug 11, 6:12 PM EDT | Flash Flood Warning | PHI | Salem | 3 hr |
| Aug 11, 7:35 PM EDT | Areal Flood Advisory | PHI | Atlantic, Cumberland | 3 hr |
| Aug 11, 7:46 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 4 days |
| Aug 11, 2:25 AM EDT | Special Weather Statement | PHI | Berks | 65 min |
| Aug 11, 3:26 AM EDT | Special Weather Statement | PHI | Berks | 64 min |
| Aug 11, 4:17 AM EDT | Areal Flood Advisory | PHI | Berks | 4 hr |
| Aug 11, 5:19 AM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Aug 11, 12:16 PM EDT | Special Weather Statement | PHI | Chester | 29 min |
| Aug 11, 12:48 PM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
| Aug 11, 1:20 PM EDT | Areal Flood Advisory | PHI | Chester, Montgomery | 3 hr |
| Aug 11, 1:33 PM EDT | Flash Flood Warning | PHI | Chester, Montgomery | 4 hr |
| Aug 11, 1:40 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Aug 11, 1:48 PM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 4 hr |
| Aug 11, 2:14 PM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Aug 11, 2:26 PM EDT | Special Weather Statement | PHI | Bucks, Philadelphia | 34 min |
| Aug 11, 2:42 PM EDT | Special Weather Statement | PHI | Bucks | 33 min |
| Aug 11, 3:50 PM EDT | Areal Flood Advisory | PHI | Berks, Montgomery | 115 min |
| Aug 11, 4:19 PM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
| Aug 11, 4:19 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 29 min |
| Aug 11, 4:47 PM EDT | Special Weather Statement | PHI | Montgomery | 28 min |
| Aug 11, 4:52 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh | 2 hr |
| Aug 11, 5:58 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 5 hr |
| Aug 11, 6:13 PM EDT | Special Weather Statement | PHI | Chester | 32 min |
| Aug 11, 1:23 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 37 min |
| Aug 11, 5:20 PM EDT | Areal Flood Advisory | PHI | Kent, New Castle | 4 hr |
| Aug 11, 6:08 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 52 min |
| Aug 11, 6:45 PM EDT | Flash Flood Warning | PHI | Kent | 5 hr |
| Aug 11, 6:55 PM EDT | Severe Thunderstorm Warning | PHI | Kent | 50 min |
| Aug 11, 7:42 PM EDT | Special Weather Statement | PHI | Kent | 48 min |
Nearby
Areal Flood Advisories in New Jersey, 2018Areal Flood Advisories in Pennsylvania, 2018Every areal flood advisory 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.