Alert archive / New Jersey / Areal Flood Advisories in 2021

Areal Flood Advisory 57, NWS Philadelphia/Mount Holly

July 9, 2021Burlington County, Monmouth County, Ocean County, New Jersey; Philadelphia County, Pennsylvania

NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 9, 2021, 2:05 AM EDT for Burlington County, Monmouth County, Ocean County, New Jersey; Philadelphia County, Pennsylvania. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jul 9, 2021, 2:05 AM EDT (06:05 UTC)
Expired: Jul 9, 2021, 10:00 AM EDT
In force: 8 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Burlington County, NJ, Monmouth County, NJ, Ocean County, NJ, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 16 km from the middle of the area, began a volume at 06:08 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 00:00Z, 6.1 hours before the alert went out and 249 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 440 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 675 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 336 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted.

703 
WGUS81 KPHI 090605
FLSPHI

Flood Advisory
National Weather Service Mount Holly NJ
205 AM EDT Fri Jul 9 2021

NJC005-025-029-PAC101-091400-
/O.NEW.KPHI.FA.Y.0057.210709T0605Z-210709T1400Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Monmouth NJ-Ocean NJ-Philadelphia PA-
205 AM EDT Fri Jul 9 2021

The National Weather Service in Mount Holly has issued a

* Flood Advisory for...
  Monmouth County in central New Jersey...
  Burlington County in southern New Jersey...
  Ocean County in southern New Jersey...
  Eastern Philadelphia County in southeastern Pennsylvania...

* Until 1000 AM EDT Friday.

* At 205 AM EDT, Doppler radar indicated areas of heavy rain 
  continued to move into the counties of Burlington, Ocean and 
  Monmouth. Minor flooding is ongoing or expected to begin shortly 
  in the advisory area. Between 0.5 and 1 inch of rain has fallen 
  with another 2 to 3 inches possible.

* Some locations that may experience flooding include...
  Toms River, Long Branch, Asbury Park, Sandy Hook, Lakewood, 
  Middletown, Old Bridge, Jackson, Howell, Evesham, and Mount Laurel.

This includes the following highways...
	New Jersey Turnpike between exits 4 and 7A.
	Interstate 295 in New Jersey between mile markers 36 and 57.
	Interstate 195 in New Jersey between mile markers 9 and 34.
	Garden State Parkway between mile markers 49 and 120.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4000 7508 4013 7474 4018 7470 4014 7459
      4018 7461 4028 7440 4045 7422 4046 7414
      4040 7398 4048 7401 4040 7394 3974 7407
      3950 7425 3963 7465 3968 7467 3978 7481
      3978 7490 3998 7501

$$

Iovino

2 follow-up statements

186 
WGUS81 KPHI 091028
FLSPHI

Flood Advisory
National Weather Service Mount Holly NJ
628 AM EDT Fri Jul 9 2021

NJC005-PAC101-091038-
/O.CAN.KPHI.FA.Y.0057.000000T0000Z-210709T1400Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Philadelphia PA-
628 AM EDT Fri Jul 9 2021

...FLOOD ADVISORY IS CANCELLED FOR BURLINGTON AND EASTERN 
PHILADELPHIA COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to 
heed any remaining road closures.


LAT...LON 4018 7461 4019 7456 4021 7455 4028 7440
      4040 7425 4045 7422 4044 7421 4045 7418
      4046 7414 4040 7398 4048 7401 4040 7394
      3974 7407 3950 7425 3956 7442 3960 7439
      3977 7439

$$

NJC025-029-091400-
/O.CON.KPHI.FA.Y.0057.000000T0000Z-210709T1400Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monmouth NJ-Ocean NJ-
628 AM EDT Fri Jul 9 2021

...FLOOD ADVISORY REMAINS IN EFFECT UNTIL 10 AM EDT THIS MORNING FOR 
MONMOUTH AND OCEAN COUNTIES...

At 628 AM EDT, Doppler radar indicated that areas of moderate rain 
continued to move into the counties of Ocean and Monmouth. Minor 
flooding is possible. Between 1 and 2 inches of rain have fallen in 
spots.

Some locations that may experience flooding include...
  Toms River, Long Branch, Asbury Park, Sandy Hook, Lakewood, 
  Middletown, Jackson, Howell, Marlboro, Manalapan, Barnegat, and 
  Tinton Falls.

This includes the following highways...
	Interstate 195 in New Jersey between mile markers 9 and 34.
	Garden State Parkway between mile markers 56 and 120.

LAT...LON 4018 7461 4019 7456 4021 7455 4028 7440
      4040 7425 4045 7422 4044 7421 4045 7418
      4046 7414 4040 7398 4048 7401 4040 7394
      3974 7407 3950 7425 3956 7442 3960 7439
      3977 7439

$$

Iovino

507 
WGUS81 KPHI 091359 RRB
FLSPHI

Flood Advisory
National Weather Service Mount Holly NJ
959 AM EDT Fri Jul 9 2021

NJC025-029-091409-
/O.EXP.KPHI.FA.Y.0057.000000T0000Z-210709T1400Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monmouth NJ-Ocean NJ-
959 AM EDT Fri Jul 9 2021

...FLOOD ADVISORY WILL EXPIRE AT 10 AM EDT THIS MORNING FOR MONMOUTH 
AND OCEAN COUNTIES...

Flood waters are receding. Please continue to heed remaining road 
closures.

LAT...LON 4018 7461 4019 7456 4021 7455 4028 7440
      4040 7425 4045 7422 4044 7421 4045 7418
      4046 7414 4040 7398 4048 7401 4040 7394
      3974 7407 3950 7425 3956 7442 3960 7439
      3977 7439

$$

Kruzdlo

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 8, 10:25 PM EDT	Areal Flood Advisory	PHI	Cape May, Cumberland	7 hr
Jul 8, 11:02 PM EDT	Special Marine Warning	PHI		88 min
Jul 8, 11:59 PM EDT	Areal Flood Advisory	PHI	Salem	5 hr
Jul 9, 12:07 AM EDT	Special Marine Warning	PHI		53 min
Jul 9, 12:08 AM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Gloucester	6 hr
Jul 9, 12:25 AM EDT	Special Marine Warning	PHI		95 min
Jul 9, 1:34 AM EDT	Special Marine Warning	PHI		86 min
Jul 9, 1:49 AM EDT	Special Marine Warning	PHI		26 min
Jul 9, 2:50 AM EDT	Tornado Warning	PHI	Atlantic, Cape May, Cumberland	25 min
Jul 9, 2:53 AM EDT	Special Marine Warning	PHI		68 min
Jul 9, 3:38 AM EDT	Tornado Warning	PHI	Atlantic, Burlington, Ocean	18 min
Jul 9, 3:51 AM EDT	Special Marine Warning	PHI		84 min
Jul 9, 4:08 AM EDT	Gale Warning	PHI		3 hr
Jul 9, 4:41 AM EDT	Tornado Warning	PHI	Monmouth, Ocean	34 min
Jul 9, 4:44 AM EDT	Areal Flood Advisory	PHI	Mercer, Middlesex	5 hr
Jul 9, 4:54 AM EDT	Areal Flood Advisory	PHI	Morris, Somerset	5 hr
Jul 9, 4:58 AM EDT	Special Marine Warning	PHI		39 min
Jul 9, 5:34 PM EDT	Areal Flood Advisory	PHI	Sussex, Warren	2 hr
Jul 9, 6:19 PM EDT	Severe Thunderstorm Warning	PHI	Salem	41 min
Jul 9, 6:24 PM EDT	Special Marine Warning	PHI		66 min
Jul 9, 6:50 PM EDT	Areal Flood Advisory	PHI	Gloucester, Salem	2 hr
Jul 9, 6:57 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Gloucester, Salem	63 min
Jul 9, 7:17 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	23 min
Jul 9, 7:39 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Morris, Sussex, Warren	2 hr
Jul 9, 7:43 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	62 min
Jul 9, 7:46 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	108 min
Jul 9, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	43 min
Jul 9, 6:55 PM EDT	Special Weather Statement	PHI	Carbon	35 min
Jul 9, 7:07 PM EDT	Areal Flood Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	3 hr
Jul 9, 7:31 PM EDT	Special Weather Statement	PHI	Northampton	29 min

Nearby

Areal Flood Advisories in New Jersey, 2021 Areal Flood Advisories in Pennsylvania, 2021 Every 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.