Alert archive / Pennsylvania / Areal Flood Advisories in 2018
Areal Flood Advisory 326, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Oct 11, 2018, 9:43 PM EDT for Burlington County, Camden County, Gloucester County, New Jersey; 5 counties in Pennsylvania. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Oct 11, 2018, 9:43 PM EDT (01:43 UTC)
- Expired
- Oct 12, 2018, 5:45 AM EDT
- In force
- 8 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Berks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 01:47 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, 1.7 hours before the alert went out and 227 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
- 1 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 670 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- -48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Oct 11, 9:34 PM EDT, 9 minutes earlier.
Area forecast discussion, Oct 11, 9:34 PM EDT, 9 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, Oct 11, 3:18 PM EDT, 6 hours 25 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 318 PM EDT Thu Oct 11 2018 NJZ001-007-PAZ054-055-060>062-121930- Sussex-Warren-Carbon-Monroe-Berks-Lehigh-Northampton- 318 PM EDT Thu Oct 11 2018 This Hazardous Weather Outlook is for northern New Jersey, east central Pennsylvania and northeast Pennsylvania. .DAY ONE...This afternoon and tonight. Occasional moderate to heavy rain may lead to localized flooding. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. DEZ001-MDZ008-012-NJZ008>010-012>022-025>027-PAZ070-071-101>106- 121930- New Castle-Cecil-Kent MD-Morris-Hunterdon-Somerset-Middlesex- Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Coastal Atlantic- Coastal Ocean-Southeastern Burlington-Delaware-Philadelphia- Western Chester-Eastern Chester-Western Montgomery- Eastern Montgomery-Upper Bucks-Lower Bucks- 318 PM EDT Thu Oct 11 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... This Hazardous Weather Outlook is for northern Delaware, northeast Maryland, central New Jersey, northern New Jersey, northwest New Jersey, southern New Jersey and southeast Pennsylvania. .DAY ONE...This afternoon 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...Friday through Wednesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. NJZ023-024-121930- Cape May-Atlantic Coastal Cape May- 318 PM EDT Thu Oct 11 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... ...WIND ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT FRIDAY... This Hazardous Weather Outlook is for southern New Jersey. .DAY ONE...This afternoon 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. Wind Advisory. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. DEZ002>004-MDZ019-020-121930- Kent-Inland Sussex-Delaware Beaches-Talbot-Caroline- 318 PM EDT Thu Oct 11 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... ...WIND ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT FRIDAY... This Hazardous Weather Outlook is for central Delaware, southern Delaware and northeast Maryland. .DAY ONE...This afternoon 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. Wind Advisory. There is a slight risk for severe thunderstorms through tonight. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. MDZ015-121930- Queen Annes- 318 PM EDT Thu Oct 11 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... This Hazardous Weather Outlook is for northeast Maryland. .DAY ONE...This afternoon 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. There is a slight risk for severe thunderstorms through tonight. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. ANZ450>455-121930- 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- 318 PM EDT Thu Oct 11 2018 ...GALE WARNING IN EFFECT UNTIL 4 PM EDT FRIDAY... This Hazardous Weather Outlook is for Atlantic coastal waters. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ430-431-121930- Delaware Bay waters north of East Point NJ to Slaughter Beach DE- Delaware Bay waters south of East Point NJ to Slaughter Beach DE- 318 PM EDT Thu Oct 11 2018 ...GALE WARNING IN EFFECT UNTIL 2 PM EDT FRIDAY... This Hazardous Weather Outlook is for Delaware Bay Waters. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Local storm report, Oct 11, 6:18 PM EDT, 3 hours 25 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
618 PM EDT THU OCT 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0215 PM HEAVY RAIN BLAIRSTOWN 40.98N 74.98W
10/11/2018 M1.45 INCH WARREN NJ TRAINED SPOTTER
24-HOUR RAINFALL. SOME THUNDER TODAY TOO.
0351 PM FLOOD HACKETTSTOWN 40.85N 74.83W
10/11/2018 WARREN NJ TRAINED SPOTTER
MINOR FLOODING NO MORE THAN A FEW INCHES ON ROADWAYS IN
LOW-LYING AREAS AND UNDERPASSES.
0428 PM HEAVY RAIN 4 SW WANTAGE 41.20N 74.60W
10/11/2018 M2.04 INCH SUSSEX NJ MESONET
0515 PM HEAVY RAIN NORTH CATASAUQUA 40.66N 75.48W
10/11/2018 M1.65 INCH NORTHAMPTON PA SOCIAL MEDIA
FLOODING ALONG CEDAR CREEK CAUSING TRAFFIC PROBLEMS
NEAR CEDAR CREST BLVD, HAMILTON AND PARKWAY BLVD AREAS.
0616 PM HEAVY RAIN READINGTON TWP 40.57N 74.80W
10/11/2018 M2.18 INCH HUNTERDON NJ TRAINED SPOTTER
&&
EVENT NUMBER PHI1801650 PHI1801649 PHI1801652 PHI1801648 PHI1801653
SFJLocal storm report, Oct 11, 7:22 PM EDT, 2 hours 21 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
722 PM EDT THU OCT 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0215 PM HEAVY RAIN BLAIRSTOWN 40.98N 74.98W
10/11/2018 M1.45 INCH WARREN NJ TRAINED SPOTTER
24-HOUR RAINFALL. SOME THUNDER TODAY TOO.
0351 PM FLOOD HACKETTSTOWN 40.85N 74.83W
10/11/2018 WARREN NJ TRAINED SPOTTER
MINOR FLOODING NO MORE THAN A FEW INCHES ON ROADWAYS IN
LOW-LYING AREAS AND UNDERPASSES.
0428 PM HEAVY RAIN 4 SW WANTAGE 41.20N 74.60W
10/11/2018 M2.04 INCH SUSSEX NJ MESONET
0515 PM HEAVY RAIN NORTH CATASAUQUA 40.66N 75.48W
10/11/2018 M1.65 INCH NORTHAMPTON PA SOCIAL MEDIA
FLOODING ALONG CEDAR CREEK CAUSING TRAFFIC PROBLEMS
NEAR CEDAR CREST BLVD, HAMILTON AND PARKWAY BLVD AREAS.
0519 PM HEAVY RAIN 1 SSW LOWER MOUNT BETHE 40.78N 75.18W
10/11/2018 M2.41 INCH NORTHAMPTON PA TRAINED SPOTTER
0616 PM HEAVY RAIN READINGTON TWP 40.57N 74.80W
10/11/2018 M2.18 INCH HUNTERDON NJ TRAINED SPOTTER
0719 PM FLOOD EASTON 38.77N 76.07W
10/11/2018 TALBOT MD EMERGENCY MNGR
STANDING WATER REPORTED ON COMMERCE DR, WEST ST., BAY
ST., AND OCEAN GATEWAY IN THE AREA OF SKIPTON CREEK.
&&
EVENT NUMBER PHI1801650 PHI1801649 PHI1801652 PHI1801648 PHI1801654
PHI1801653 PHI1801655
SFJSpecial weather statement, Oct 11, 7:50 PM EDT, 1 hour 53 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
750 PM EDT THU OCT 11 2018
DEZ001-002-MDZ008-012-015-020-NJZ016-120015-
Kent-New Castle-Queen Anne's-Cecil-Kent-Caroline-Salem-
750 PM EDT THU OCT 11 2018
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN NEW CASTLE...
NORTHWESTERN KENT...NORTHEASTERN QUEEN ANNE'S...NORTHEASTERN
CAROLINE...NORTHEASTERN KENT...SOUTHEASTERN CECIL AND SOUTHWESTERN
SALEM COUNTIES...
At 749 PM EDT, a strong thunderstorm was located over Cheswold, or
near Dover, moving north at 30 mph.
Winds up to 40 mph are possible with this storm.
Locations impacted include...
Dover, Middletown, Smyrna, Camden, Clayton, Cheswold, Cecilton,
Millington, Hartly, Warwick, Woodland Beach, Bohemias Mills, Hancocks
Bridge, Hazlettville, Port Penn, Delaney Corner, Dover Base Housing,
Dover Speedway, Sassafras and Mount Pleasant.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
LAT...LON 3953 7557 3951 7555 3952 7553 3952 7544
3942 7545 3946 7551 3946 7554 3943 7555
3935 7549 3933 7550 3934 7549 3933 7546
3911 7548 3906 7581 3954 7591
TIME...MOT...LOC 2349Z 179DEG 27KT 3920 7561
SFJSpecial weather statement, Oct 11, 8:09 PM EDT, 1 hour 34 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Oct 11, 8:41 PM EDT, 1 hour 2 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Oct 11, 9:10 PM EDT, 33 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 8:09 PM EDT | Special Weather Statement | PHI | Salem | 36 min |
| Oct 11, 8:27 PM EDT | Areal Flood Advisory | PHI | Cumberland, Gloucester, Salem | 8 hr |
| Oct 11, 8:41 PM EDT | Special Weather Statement | PHI | Gloucester, Salem | 34 min |
| Oct 11, 9:10 PM EDT | Special Weather Statement | PHI | Camden, Gloucester, Salem | 35 min |
| Oct 11, 10:45 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more | 3 hr |
| Oct 11, 11:54 PM EDT | High Wind Warning | PHI | Cape May | 9 hr |
| Oct 12, 12:08 AM EDT | Flash Flood Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 4 hr |
| Oct 12, 12:14 AM EDT | Storm Warning | PHI | 9 hr | |
| Oct 12, 12:50 AM EDT | Areal Flood Advisory | PHI | Burlington, Mercer, Monmouth, Ocean | 3 hr |
| Oct 12, 1:15 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland, Ocean | 40 min |
| Oct 12, 1:52 AM EDT | Flash Flood Warning | PHI | Atlantic, Burlington, Cape May, Cumberland, Ocean | 4 hr |
| Oct 12, 2:55 AM EDT | Areal Flood Advisory | PHI | Gloucester, Hunterdon, Mercer, Middlesex, Somerset, Warren | 2 hr |
| Oct 12, 3:17 AM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Monmouth, Ocean | 4 hr |
| Oct 12, 3:46 AM EDT | Areal Flood Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 7 hr |
| Oct 12, 5:32 AM EDT | Areal Flood Warning | PHI | Atlantic, Burlington, Cape May, Cumberland, Ocean | 4 hr |
| Oct 12, 7:02 AM EDT | Areal Flood Warning | PHI | Burlington, Mercer, Monmouth, Ocean | 4 hr |
| Oct 12, 11:42 AM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Middlesex, Monmouth, Ocean | 4 hr |
| Oct 12, 11:45 AM EDT | Small Craft Advisory | PHI | 12 hr | |
| Oct 12, 3:20 PM EDT | River Flood Warning | PHI | Burlington | 37 hr |
| Oct 11, 10:06 PM EDT | Flash Flood Warning | PHI | Kent | 6 hr |
| Oct 11, 11:47 PM EDT | Flash Flood Warning | PHI | Kent, Sussex | 4 hr |
| Oct 12, 3:28 AM EDT | Areal Flood Warning | PHI | Kent, Sussex | 6 hr |
| Oct 12, 3:36 AM EDT | Areal Flood Warning | PHI | Kent | 6 hr |
| Oct 12, 2:46 PM EDT | Areal Flood Warning | PHI | Kent | 7 hr |
Nearby
Areal Flood Advisories in Pennsylvania, 2018Areal Flood Advisories in New Jersey, 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.