Alert archive / New Jersey / Areal Flood Advisories in 2021
Areal Flood Advisory 166, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Aug 29, 2021, 11:20 AM EDT for Atlantic County, Cape May County, New Jersey. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 29, 2021, 11:20 AM EDT (15:20 UTC)
- Expired
- Aug 29, 2021, 2:17 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Atlantic County, NJ, Cape May County, NJ
The radar
The Dover AFB radar (KDOX), 82 km from the middle of the area, began a volume at 15:24 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 3.3 hours before the alert went out and 158 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
- 87 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 568 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- -11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
460
WGUS81 KPHI 291520
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
1120 AM EDT Sun Aug 29 2021
NJC001-009-291830-
/O.NEW.KPHI.FA.Y.0166.210829T1520Z-210829T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Atlantic NJ-Cape May NJ-
1120 AM EDT Sun Aug 29 2021
The National Weather Service in Mount Holly has issued a
* Flood Advisory for...
Southeastern Atlantic County in southern New Jersey...
Northeastern Cape May County in southern New Jersey...
* Until 230 PM EDT.
* At 1120 AM EDT, Doppler radar indicated heavy rain. Minor flooding
is ongoing or expected to begin shortly in the advisory area.
Between 0.5 and 1 inch of rain has fallen.
* Some locations that may experience flooding include...
Atlantic City, Ocean City, Pleasantville, Somers Point, Ventnor
City, Northfield, Margate City, Sea Isle City, Avalon, Longport,
Corbin City, and Marmora.
This includes the following highways...
Garden State Parkway between mile markers 12 and 27...and
between mile markers 29 and 30...and
between mile markers 32 and 36.
Atlantic City Expressway between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3911 7481 3930 7465 3941 7457 3938 7447
3935 7439 3905 7469 3908 7475
$$
SFJ1 follow-up statement
949
WGUS81 KPHI 291817
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
217 PM EDT Sun Aug 29 2021
NJC001-009-291827-
/O.CAN.KPHI.FA.Y.0166.000000T0000Z-210829T1830Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Atlantic NJ-Cape May NJ-
217 PM EDT Sun Aug 29 2021
...FLOOD ADVISORY IS CANCELLED FOR SOUTHEASTERN ATLANTIC AND
NORTHEASTERN CAPE MAY COUNTIES...
The threat for widespread flooding has increased over the area.
Therefore the Flood Advisory has been replaced by a Flash flood
Warning. Please refer to that bulletin for more information.
LAT...LON 3911 7481 3930 7465 3941 7457 3938 7447
3935 7439 3905 7469 3908 7475
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 12:37 PM EDT | Flash Flood Warning | PHI | Atlantic, Cape May | 4 hr |
Nearby
Areal Flood Advisories in New Jersey, 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.