Alert archive / New Jersey / Areal Flood Warnings in 2021

Areal Flood Warning 54, NWS Philadelphia/Mount Holly

October 26, 20215 counties in New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Oct 26, 2021, 1:22 AM EDT for 5 counties in New Jersey. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 26, 2021, 1:22 AM EDT (05:22 UTC)
Expired
Oct 26, 2021, 6:43 AM EDT
In force
5 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Atlantic County, NJ, Burlington County, NJ, Cape May County, NJ, Cumberland County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 56 km from the middle of the area, began a volume at 05:26 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, 5.4 hours before the alert went out and 184 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2021-10-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2021-10-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
12 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1053 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
-71 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

516 
WGUS41 KPHI 260522
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
122 AM EDT Tue Oct 26 2021

NJC001-005-009-011-029-260915-
/O.NEW.KPHI.FA.W.0054.211026T0522Z-211026T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Atlantic NJ-Burlington NJ-Cape May NJ-Cumberland NJ-Ocean NJ-
122 AM EDT Tue Oct 26 2021

The National Weather Service in Mount Holly has issued a

* Flood Warning for...
  Atlantic County in southern New Jersey...
  Southeastern Burlington County in southern New Jersey...
  Northeastern Cape May County in southern New Jersey...
  East Central Cumberland County in southern New Jersey...
  South Central Ocean County in southern New Jersey...

* Until 515 AM EDT.

* At 122 AM EDT, Doppler radar indicated heavy rain. Flooding is 
  ongoing or expected to begin shortly in the warned area.

* Some locations that may experience flooding include...
  Vineland, Atlantic City, Ocean City, Cumberland, Pleasantville, 
  Hammonton, Somers Point, Ventnor City, Brigantine, Northfield, 
  Absecon, and Margate City.

Rainfall rates of over one inch per hour are occurring. An 
additional one to two inches is possible through 515 AM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles. Beware of flooded roads which are 
hard to recognize at night.

&&

LAT...LON 3972 7465 3957 7428 3956 7425 3953 7419
      3904 7475 3909 7478 3941 7497

$$

PO
2 follow-up statements
138 
WGUS41 KPHI 260904
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
504 AM EDT Tue Oct 26 2021

NJC001-005-009-011-029-261100-
/O.EXT.KPHI.FA.W.0054.000000T0000Z-211026T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Atlantic NJ-Burlington NJ-Cape May NJ-Cumberland NJ-Ocean NJ-
504 AM EDT Tue Oct 26 2021

The National Weather Service in Mount Holly has extended the

* Flood Warning for...
  Atlantic County in southern New Jersey...
  Southeastern Burlington County in southern New Jersey...
  Northeastern Cape May County in southern New Jersey...
  East Central Cumberland County in southern New Jersey...
  South Central Ocean County in southern New Jersey...

* Until 700 AM EDT.

* At 504 AM EDT, Doppler radar indicated heavy rain continuing 
  across the area. Flooding, from heavy rains earlier, and the 
  present rains will continue in the warned area.

* Some locations that may experience flooding include...
  Vineland, Atlantic City, Ocean City, Cumberland, Pleasantville, 
  Hammonton, Somers Point, Ventnor City, Brigantine, Northfield, 
  Absecon, and Margate City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around...don't drown when encountering flooded roads. Most 
flood deaths occur in vehicles.

&&

LAT...LON 3972 7465 3957 7428 3956 7425 3953 7419
      3904 7475 3909 7478 3941 7497

$$

PO
645 
WGUS81 KPHI 261043
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
643 AM EDT Tue Oct 26 2021

NJC001-005-009-011-029-261053-
/O.CAN.KPHI.FA.W.0054.000000T0000Z-211026T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Atlantic NJ-Burlington NJ-Cape May NJ-Cumberland NJ-Ocean NJ-
643 AM EDT Tue Oct 26 2021

...FLOOD WARNING IS CANCELLED FOR ATLANTIC, SOUTHEASTERN BURLINGTON, 
NORTHEASTERN CAPE MAY, EAST CENTRAL CUMBERLAND, AND SOUTH CENTRAL 
OCEAN COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3972 7465 3957 7428 3956 7425 3953 7419
      3904 7475 3909 7478 3941 7497

$$

PO

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 25, 8:26 PM EDTSpecial Weather StatementPHIMercer34 min
Oct 25, 8:33 PM EDTSpecial Weather StatementPHIWarren42 min
Oct 25, 9:09 PM EDTSpecial Weather StatementPHIMiddlesex, Morris, Somerset51 min
Oct 26, 2:08 AM EDTFlash Flood WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean4 hr
Oct 26, 3:08 AM EDTFlash Flood WarningPHIMiddlesex, Monmouth, Ocean8 hr
Oct 26, 4:14 AM EDTFlash Flood WarningPHIHunterdon, Middlesex, Morris, Somerset4 hr
Oct 26, 5:22 AM EDTAreal Flood AdvisoryPHIMorris, Sussex, Warren2 hr
Oct 26, 6:09 AM EDTAreal Flood WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean3 hr
Oct 26, 6:18 AM EDTAreal Flood WarningPHIHunterdon, Mercer, Middlesex, Somerset13 hr
Oct 26, 7:15 AM EDTAreal Flood WarningPHIMonmouth, Ocean5 hr
Oct 26, 7:32 AM EDTRiver Flood WarningPHISomerset28 hr
Oct 26, 7:38 AM EDTAreal Flood WarningPHIHunterdon, Morris, Somerset, Sussex, Warren37 hr
Oct 26, 8:07 AM EDTAreal Flood WarningPHIHunterdon, Middlesex, Morris, Somerset12 hr
Oct 26, 8:18 AM EDTRiver Flood WarningPHIMorris, Somerset8 hr
Oct 26, 10:12 AM EDTRiver Flood WarningPHISomerset11 hr
Oct 26, 10:12 AM EDTRiver Flood WarningPHIMiddlesex, Somerset24 hr
Oct 26, 10:12 AM EDTRiver Flood WarningPHIMiddlesex, Somerset33 hr
Oct 26, 10:50 AM EDTAreal Flood WarningPHIMiddlesex, Monmouth, Ocean9 hr
Oct 26, 4:24 PM EDTRiver Flood WarningPHIMorris31 hr
Oct 26, 4:28 PM EDTRiver Flood WarningPHIMorris, Passaic29 hr
Oct 26, 4:39 PM EDTRiver Flood WarningPHIEssex, Morris, Passaic54 hr
Oct 26, 4:39 PM EDTRiver Flood WarningPHIEssex, Passaic42 hr

Nearby

Areal Flood Warnings in New Jersey, 2021Every areal flood warning 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.