Alert archive / Pennsylvania / Areal Flood Advisories in 2018
Areal Flood Advisory 131, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 15, 2018, 9:47 AM EDT for Hunterdon County, New Jersey; Bucks County, Lehigh County, Northampton County, Pennsylvania. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jul 15, 2018, 9:47 AM EDT (13:47 UTC)
- Expired
- Jul 15, 2018, 1:18 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 98 km from the middle of the area, began a volume at 13:46 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 12:00Z, 1.8 hours before the alert went out and 202 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
- 63 J/kg
- Mixed-layer CIN
- -154 J/kg
- Mixed-layer LCL
- 851 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Jul 15, 9:45 AM EDT, 2 minutes earlier.
Area forecast discussion, Jul 15, 9:45 AM EDT, 2 minutes before
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</html>Hazardous weather outlook, Jul 15, 3:10 AM EDT, 6 hours 37 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 310 AM EDT Sun Jul 15 2018 DEZ001-NJZ015-017>019-PAZ070-071-102-104-106-160715- New Castle-Mercer-Gloucester-Camden-Northwestern Burlington-Delaware- Philadelphia-Eastern Chester-Eastern Montgomery-Lower Bucks- 310 AM EDT Sun Jul 15 2018 This Hazardous Weather Outlook is for northern Delaware, central New Jersey, southern New Jersey and southeast Pennsylvania. .DAY ONE...Today and Tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Heat index values near 100 degrees are possible on Monday and Tuesday. Heavy rain is possible on Tuesday, which may result in local flooding. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ002-003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-016-020>023- 027-PAZ054-055-060>062-101-103-105-160715- Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-Caroline-Sussex- Warren-Morris-Hunterdon-Somerset-Middlesex-Western Monmouth-Salem- Ocean-Cumberland-Atlantic-Cape May-Southeastern Burlington-Carbon- Monroe-Berks-Lehigh-Northampton-Western Chester-Western Montgomery- Upper Bucks- 310 AM EDT Sun Jul 15 2018 This Hazardous Weather Outlook is for central Delaware, southern Delaware, northeast Maryland, central New Jersey, northern New Jersey, northwest New Jersey, southern New Jersey, east central Pennsylvania, northeast Pennsylvania and southeast Pennsylvania. .DAY ONE...Today and Tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Heavy rain is possible on Tuesday, which may result in local flooding. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. DEZ004-NJZ014-024>026-160715- Delaware Beaches-Eastern Monmouth-Atlantic Coastal Cape May- Coastal Atlantic-Coastal Ocean- 310 AM EDT Sun Jul 15 2018 This Hazardous Weather Outlook is for southern Delaware, central New Jersey and southern New Jersey. .DAY ONE...Today and Tonight. There is a moderate risk for the formation of dangerous rip currents today. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Heavy rain is possible on Tuesday, which may result in local flooding. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. ANZ430-431-450>455-160715- 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- 310 AM EDT Sun Jul 15 2018 This Hazardous Weather Outlook is for Atlantic coastal waters and Delaware Bay Waters. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. 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.
In the hours before
Special weather statement, Jul 15, 5:22 AM EDT, 4 hours 25 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
522 AM EDT SUN JUL 15 2018
NJZ001-008-150945-
Morris-Sussex-
522 AM EDT SUN JUL 15 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL MORRIS AND
SOUTHWESTERN SUSSEX COUNTIES...
At 521 AM EDT, a strong thunderstorm was located near Five Points, or
near Newton, moving southeast at 20 mph.
Pea size hail and wind gusts to 35 mph are possible with this storm.
Locations impacted include...
Newton, Hopatcong, Wharton, Mount Arlington, Stanhope, Ogdensburg,
Branchville, Andover, Flatbrookville, Lake Mohawk, Five Points,
Crandon Lakes and Succasunna-Kenvil.
LAT...LON 4103 7448 4086 7462 4103 7490 4110 7497
4109 7499 4112 7497 4112 7495 4120 7487
TIME...MOT...LOC 0921Z 302DEG 19KT 4105 7482
SFJSpecial weather statement, Jul 15, 6:27 AM EDT, 3 hours 20 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
627 AM EDT SUN JUL 15 2018
NJZ010-012-013-151100-
Western Monmouth-Somerset-Middlesex-
627 AM EDT SUN JUL 15 2018
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL SOMERSET...NORTHEASTERN
MIDDLESEX AND NORTH CENTRAL MONMOUTH COUNTIES...
At 626 AM EDT, a strong thunderstorm was located over Society Hill,
or near New Brunswick, moving east at 35 mph.
Pea size hail is possible with this storm.
Locations impacted include...
New Brunswick, Perth Amboy, Somerville, Somerset, Edison, Old Bridge,
East Brunswick, Sayreville, Carteret, Middlesex, Bound Brook,
Manville, Matawan, Millstone, Colonia, Brownville, Society Hill,
North Brunswick Township, Woodbridge and South Plainfield.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4034 7420 4052 7465 4062 7453 4061 7444
4060 7446 4061 7435 4059 7429 4060 7420
4056 7421 4055 7425 4050 7426 4050 7428
4046 7426 4044 7420 4046 7418 4045 7416
TIME...MOT...LOC 1026Z 286DEG 31KT 4052 7447
SFJSpecial weather statement, Jul 15, 7:59 AM EDT, 1 hour 48 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
759 AM EDT SUN JUL 15 2018
NJZ008-010-012-151230-
Morris-Somerset-Middlesex-
759 AM EDT SUN JUL 15 2018
...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN MORRIS...NORTHEASTERN
SOMERSET AND NORTH CENTRAL MIDDLESEX COUNTIES...
At 757 AM EDT, a strong thunderstorm was located near Chester, or 13
miles west of Morristown, moving southeast at 40 mph.
Winds up to 40 mph are possible with this storm. Locally heavy
rainfall may create ponding on roadways.
Locations impacted include...
Morristown, Madison, Middlesex, Florham Park, Bound Brook, Chatham,
Morris Plains, Mount Arlington, Mendham, Stanhope, Netcong, Peapack
And Gladstone, Chester, Far Hills, Long Valley, Martinsville,
Millington, Succasunna, Succasunna-Kenvil and Society Hill.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4049 7442 4072 7473 4078 7483 4090 7471
4091 7469 4079 7437 4076 7438 4075 7436
4074 7437 4067 7446 4066 7445 4066 7441
4065 7440 4060 7446 4060 7432
TIME...MOT...LOC 1157Z 303DEG 33KT 4083 7472
poThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 10:43 PM EDT | Special Weather Statement | PHI | Sussex | 32 min |
| Jul 14, 11:29 PM EDT | Areal Flood Advisory | PHI | Sussex | 3 hr |
| Jul 15, 5:22 AM EDT | Special Weather Statement | PHI | Sussex | 23 min |
| Jul 15, 6:27 AM EDT | Special Weather Statement | PHI | Middlesex | 33 min |
| Jul 15, 7:59 AM EDT | Special Weather Statement | PHI | Somerset | 31 min |
| Jul 15, 8:42 AM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Northampton | 4 hr |
| Jul 15, 9:44 AM EDT | Areal Flood Advisory | PHI | Berks | 4 hr |
| Jul 15, 10:06 AM EDT | Flash Flood Warning | PHI | Berks | 114 min |
| Jul 15, 10:57 AM EDT | Areal Flood Advisory | PHI | Berks, Chester, Montgomery | 2 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.