Alert archive / New Jersey / Areal Flood Advisories in 2021
Areal Flood Advisory 49, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 6, 2021, 9:10 PM EDT for 7 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 6, 2021, 9:10 PM EDT (01:10 UTC)
- Expired
- Jul 6, 2021, 11:27 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ, Warren County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 01:10 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, 1.2 hours before the alert went out and 144 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
- 1647 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 876 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.3
The text
As transmitted.
733
WGUS81 KPHI 070110
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
910 PM EDT Tue Jul 6 2021
NJC019-021-023-025-027-035-041-PAC017-070415-
/O.NEW.KPHI.FA.Y.0049.210707T0110Z-210707T0415Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Mercer NJ-Middlesex NJ-Monmouth NJ-Morris NJ-Somerset
NJ-Warren NJ-Bucks PA-
910 PM EDT Tue Jul 6 2021
The National Weather Service in Mount Holly has issued a
* Urban and Small Stream Flood Advisory for...
Mercer County in central New Jersey...
Central Monmouth County in central New Jersey...
Middlesex County in northern New Jersey...
Southwestern Morris County in northern New Jersey...
Somerset County in northern New Jersey...
Hunterdon County in northwestern New Jersey...
Southern Warren County in northwestern New Jersey...
Bucks County in southeastern Pennsylvania...
* Until 1215 AM EDT.
* At 910 PM EDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause urban and small stream flooding.
* Some locations that will experience flooding include...
Trenton, New Brunswick, Perth Amboy, Somerville, Somerset, Edison,
Middletown, Old Bridge, East Brunswick, Bridgewater, South
Brunswick, and Sayreville.
This includes the following highways...
New Jersey Turnpike between exits 8 and 13.
Interstate 78 in New Jersey between mile markers 7 and 42.
Interstate 295 in New Jersey between mile markers 59 and 76.
Interstate 195 in New Jersey between mile markers 0 and 9.
Interstate 287 in New Jersey between mile markers 0 and 29.
Garden State Parkway between mile markers 112 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4079 7482 4070 7443 4069 7445 4067 7446
4066 7440 4065 7441 4060 7446 4060 7422
4047 7427 4044 7421 4046 7414 4041 7406
4022 7427 4015 7480 4032 7530 4055 7530
$$
Fitzsimmons3 follow-up statements
689
WGUS81 KPHI 070146
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
946 PM EDT Tue Jul 6 2021
NJC041-PAC017-070156-
/O.CAN.KPHI.FA.Y.0049.000000T0000Z-210707T0415Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren NJ-Bucks PA-
946 PM EDT Tue Jul 6 2021
...THE URBAN AND SMALL STREAM FLOOD ADVISORY IS CANCELLED FOR
SOUTHERN WARREN AND BUCKS COUNTIES...
Urban and small stream flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 4041 7501 4047 7507 4054 7507 4060 7518
4079 7482 4070 7443 4069 7445 4066 7445
4066 7440 4060 7446 4060 7422 4047 7427
4044 7421 4046 7414 4041 7406 4022 7427
4016 7472
$$
NJC019-021-023-025-027-035-070415-
/O.CON.KPHI.FA.Y.0049.000000T0000Z-210707T0415Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Mercer NJ-Middlesex NJ-Monmouth NJ-Morris NJ-Somerset
NJ-
946 PM EDT Tue Jul 6 2021
...THE URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT UNTIL
1215 AM EDT WEDNESDAY FOR MERCER, CENTRAL MONMOUTH, MIDDLESEX,
SOUTHWESTERN MORRIS, SOMERSET, AND HUNTERDON COUNTIES...
At 946 PM EDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause urban and small stream flooding.
Between 1 and 2 inches of rain have fallen.
Some locations that will experience flooding include...
Trenton, New Brunswick, Perth Amboy, Somerville, Somerset, Edison,
Middletown, Old Bridge, East Brunswick, Bridgewater, South
Brunswick, and Sayreville.
This includes the following highways...
New Jersey Turnpike between exits 8 and 13.
Interstate 78 in New Jersey between mile markers 8 and 42.
Interstate 295 in New Jersey between mile markers 59 and 76.
Interstate 195 in New Jersey between mile markers 0 and 9.
Interstate 287 in New Jersey between mile markers 0 and 29.
Garden State Parkway between mile markers 112 and 134.
LAT...LON 4041 7501 4047 7507 4054 7507 4060 7518
4079 7482 4070 7443 4069 7445 4066 7445
4066 7440 4060 7446 4060 7422 4047 7427
4044 7421 4046 7414 4041 7406 4022 7427
4016 7472
$$
Fitzsimmons665
WGUS81 KPHI 070255
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
1055 PM EDT Tue Jul 6 2021
NJC027-070305-
/O.CAN.KPHI.FA.Y.0049.000000T0000Z-210707T0415Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Morris NJ-
1055 PM EDT Tue Jul 6 2021
...THE URBAN AND SMALL STREAM FLOOD ADVISORY IS CANCELLED FOR
SOUTHWESTERN MORRIS COUNTY...
Urban and small stream flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 4035 7495 4040 7497 4041 7501 4066 7445
4066 7440 4060 7446 4060 7422 4050 7426
4050 7428 4047 7427 4044 7421 4046 7414
4041 7406 4022 7427 4017 7467 4018 7470
4016 7472
$$
NJC019-021-023-025-035-070415-
/O.CON.KPHI.FA.Y.0049.000000T0000Z-210707T0415Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Mercer NJ-Middlesex NJ-Monmouth NJ-Somerset NJ-
1055 PM EDT Tue Jul 6 2021
...THE URBAN AND SMALL STREAM FLOOD ADVISORY REMAINS IN EFFECT UNTIL
1215 AM EDT WEDNESDAY FOR MERCER, CENTRAL MONMOUTH, MIDDLESEX,
SOMERSET, AND SOUTHEASTERN HUNTERDON COUNTIES...
At 1055 PM EDT, Doppler radar indicated heavy rain due to
thunderstorms. This will cause urban and small stream flooding.
Between 1 and 2 inches of rain have fallen.
Some locations that will experience flooding include...
Trenton, New Brunswick, Perth Amboy, Somerville, Somerset, Edison,
Middletown, Old Bridge, East Brunswick, South Brunswick,
Sayreville, and North Brunswick.
This includes the following highways...
New Jersey Turnpike between exits 8 and 13.
Interstate 78 in New Jersey between mile markers 41 and 42.
Interstate 295 in New Jersey between mile markers 59 and 76.
Interstate 195 in New Jersey between mile markers 0 and 9.
Interstate 287 in New Jersey between mile markers 0 and 16.
Garden State Parkway between mile markers 112 and 134.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4035 7495 4040 7497 4041 7501 4066 7445
4066 7440 4060 7446 4060 7422 4050 7426
4050 7428 4047 7427 4044 7421 4046 7414
4041 7406 4022 7427 4017 7467 4018 7470
4016 7472
$$
Iovino877
WGUS81 KPHI 070327
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
1127 PM EDT Tue Jul 6 2021
NJC019-021-023-025-035-070337-
/O.CAN.KPHI.FA.Y.0049.000000T0000Z-210707T0415Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Mercer NJ-Middlesex NJ-Monmouth NJ-Somerset NJ-
1127 PM EDT Tue Jul 6 2021
...THE URBAN AND SMALL STREAM FLOOD ADVISORY IS CANCELLED FOR
MERCER, CENTRAL MONMOUTH, MIDDLESEX, SOMERSET, AND SOUTHEASTERN
HUNTERDON COUNTIES...
The heavy rain has ended. Urban and small stream flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 4035 7495 4040 7497 4041 7501 4066 7445
4066 7440 4060 7446 4060 7422 4050 7426
4050 7428 4047 7427 4044 7421 4046 7414
4041 7406 4022 7427 4017 7467 4018 7470
4016 7472
$$
IovinoThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:03 PM EDT | Special Weather Statement | PHI | Burlington, Ocean | 42 min |
| Jul 6, 8:11 PM EDT | Special Marine Warning | PHI | 82 min | |
| Jul 6, 8:24 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Jul 6, 8:29 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Warren | 46 min |
| Jul 6, 8:37 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Monmouth, Morris, Somerset | 53 min |
| Jul 6, 8:50 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Somerset | 40 min |
| Jul 6, 9:04 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 41 min |
| Jul 6, 9:29 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset | 61 min |
| Jul 6, 9:37 PM EDT | Special Marine Warning | PHI | 113 min | |
| Jul 6, 9:48 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 57 min |
| Jul 6, 10:21 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden | 39 min |
| Jul 6, 10:50 PM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 2 hr |
| Jul 6, 10:54 PM EDT | Special Weather Statement | PHI | Burlington | 51 min |
| Jul 6, 11:11 PM EDT | Special Weather Statement | PHI | Burlington | 19 min |
| Jul 6, 11:30 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Ocean | 45 min |
| Jul 6, 11:39 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 6, 11:55 PM EDT | Special Weather Statement | PHI | Monmouth | 50 min |
| Jul 7, 12:01 AM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth | 71 min |
| Jul 7, 12:10 AM EDT | Special Marine Warning | PHI | 95 min | |
| Jul 7, 11:19 AM EDT | Tropical Storm Watch | PHI | Atlantic, Burlington, Cape May, Monmouth, Ocean | 18 hr |
| Jul 7, 3:32 PM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 42 hr |
| Jul 6, 8:16 PM EDT | Special Weather Statement | PHI | Lehigh | 29 min |
| Jul 6, 10:08 PM EDT | Special Weather Statement | PHI | Philadelphia | 37 min |
Nearby
Areal Flood Advisories in New Jersey, 2021Areal Flood Advisories in Pennsylvania, 2021Every areal flood advisory in 2021
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.