Alert archive / New Jersey / Areal Flood Warnings in 2026

Areal Flood Warning 21, NWS Philadelphia/Mount Holly

August 27, 2026Middlesex County, Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Aug 27, 2026, 6:17 PM EDT for Middlesex County, Monmouth County, New Jersey. It was in force for 4 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 27, 2026, 6:17 PM EDT (22:17 UTC)
Expired
Aug 27, 2026, 10:08 PM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Middlesex County, NJ, Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 56 km from the middle of the area, began a volume at 22:18 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.

What was reported inside it

TimeReportWhereRemark
Aug 27, 6:17 PM EDTRAIN 2.42 Ssw Browntown, NJMesonet station AV757 Old Bridge.
Aug 27, 6:20 PM EDTRAIN 2.862 S Spotswood, NJMesonet station CW1053 Monroe Twp.
Aug 27, 9:30 PM EDTRAIN 2.892 Ssw Browntown, NJMesonet station FW8442 Old Bridge.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.3 hours before the alert went out and 118 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, Brookhaven, NY at 12:00Z on 2026-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 346 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2026-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.193958Sfc1 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
346 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
890 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

627 
WGUS41 KPHI 272217
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
Issued by National Weather Service New York NY
617 PM EDT Thu Aug 27 2026

NJC023-025-280230-
/O.NEW.KPHI.FA.W.0021.260827T2217Z-260828T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-Monmouth NJ-
617 PM EDT Thu Aug 27 2026

...FLOOD WARNING IN EFFECT UNTIL 1030 PM EDT THIS EVENING...
...REPLACES FLASH FLOOD WARNING...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Northeastern Monmouth County in central New Jersey...
  Southeastern Middlesex County in northern New Jersey...

* WHEN...Until 1030 PM EDT.

* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying
  and flood-prone locations is imminent or occurring.

* ADDITIONAL DETAILS...
  - At 615 PM EDT, local law enforcement reported heavy rain in the
    warned area due to thunderstorms. Flooding is ongoing or expected
    to begin shortly. Between 2.5 and 3.5 inches of rain have fallen.
  - Additional rainfall amounts up to 0.5 inches are possible in the
    warned area.
  - Some locations that will experience flooding include...
    Long Branch, Sandy Hook, Middletown, Old Bridge, Marlboro, Tinton
    Falls, Holmdel, Red Bank, Keansburg, Matawan and Lincroft.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4044 7426 4046 7425 4044 7421 4046 7414
      4042 7406 4040 7398 4043 7399 4042 7399
      4042 7400 4048 7401 4042 7397 4027 7398
      4023 7430 4031 7449


$$

PHI
1 follow-up statement
754 
WGUS81 KPHI 280208
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
Issued by National Weather Service New York NY
1008 PM EDT Thu Aug 27 2026

NJC023-025-280218-
/O.CAN.KPHI.FA.W.0021.000000T0000Z-260828T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-Monmouth NJ-
1008 PM EDT Thu Aug 27 2026

...FLOOD WARNING IS CANCELLED...

The Flood Warning is cancelled for portions of central and northern
New Jersey, including the following areas, in central New Jersey,
Monmouth. In northern New Jersey, Middlesex.

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

A Flood Watch remains in effect until 400 AM EDT for portions of
central and southern New Jersey.

A Flood Watch remains in effect until 400 AM EDT for portions of
northern Delaware, New Jersey, and Pennsylvania...

&&

LAT...LON 4044 7426 4046 7425 4044 7421 4046 7414
      4042 7406 4040 7398 4043 7399 4042 7399
      4042 7400 4048 7401 4042 7397 4027 7398
      4023 7430 4031 7449


$$

PHI

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 11:38 AM EDTFlash Flood WarningPHIGloucester4 hr
Aug 27, 12:26 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester49 min
Aug 27, 12:41 PM EDTFlash Flood WarningPHICamden, Gloucester, Salem5 hr
Aug 27, 1:06 PM EDTSevere Thunderstorm WarningPHIMiddlesex24 min
Aug 27, 1:07 PM EDTFlash Flood WarningPHIMiddlesex, Somerset4 hr
Aug 27, 1:15 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester45 min
Aug 27, 1:17 PM EDTFlash Flood WarningPHIMercer, Somerset7 hr
Aug 27, 1:20 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth40 min
Aug 27, 1:26 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth49 min
Aug 27, 1:32 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem43 min
Aug 27, 1:34 PM EDTSpecial Marine WarningPHI21 min
Aug 27, 1:50 PM EDTFlash Flood WarningPHISalem4 hr
Aug 27, 1:57 PM EDTTornado WarningPHISalem11 min
Aug 27, 2:02 PM EDTSevere Thunderstorm WarningPHIMonmouth28 min
Aug 27, 2:13 PM EDTSevere Thunderstorm WarningPHIMonmouth47 min
Aug 27, 2:16 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester, Salem44 min
Aug 27, 2:18 PM EDTFlash Flood WarningPHIMiddlesex, Monmouth4 hr
Aug 27, 2:20 PM EDTSpecial Marine WarningPHI40 min
Aug 27, 2:31 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean44 min
Aug 27, 2:38 PM EDTFlash Flood WarningPHICamden4 hr
Aug 27, 2:58 PM EDTSevere Thunderstorm WarningPHIMonmouth30 min
Aug 27, 3:00 PM EDTSpecial Marine WarningPHI60 min
Aug 27, 3:04 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden41 min
Aug 27, 3:26 PM EDTAreal Flood WarningPHIGloucester, Salem5 hr
Aug 27, 3:43 PM EDTFlash Flood WarningPHICamden3 hr
Aug 27, 4:52 PM EDTFlash Flood WarningPHIWarren3 hr
Aug 27, 4:59 PM EDTAreal Flood WarningPHIMiddlesex, Somerset4 hr
Aug 27, 5:44 PM EDTAreal Flood WarningPHICamden, Gloucester5 hr
Aug 27, 7:00 PM EDTFlash Flood WarningPHIBurlington, Camden3 hr
Aug 27, 7:26 PM EDTSpecial Marine WarningPHI32 min

Nearby

Areal Flood Warnings in New Jersey, 2026Every areal flood warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.