Alert archive / New Jersey / Flash Flood Warnings in 2026

Flash Flood Warning 116, NWS Philadelphia/Mount Holly

August 7, 2026Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 7, 2026, 6:39 PM EDT for Monmouth County, New Jersey. It was in force for 3 hr. 1 report 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 7, 2026, 6:39 PM EDT (22:39 UTC)
Expired
Aug 7, 2026, 9:45 PM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 22:38 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 7, 7:29 PM EDTFLASH FLOOD1 N East Long Branch, NJNJ DOT: Flooding on NJ 36 both Directions North of CR 29/Atlantic Ave (Long Branch), All lanes closed northbound; All lanes closed southbound. Time from report.

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, 10.7 hours before the alert went out and 109 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 2026-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2423 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 2026-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 square meters per square second.1939Sfc1 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
2423 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
685 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
-18 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted.

971 
WGUS51 KPHI 072239
FFWPHI
NJC025-080145-
/O.NEW.KPHI.FF.W.0116.260807T2239Z-260808T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
639 PM EDT Fri Aug 7 2026

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Northeastern Monmouth County in central New Jersey...

* Until 945 PM EDT.

* At 639 PM EDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  0.5 and 1.5 inches of rain have fallen. The expected rainfall rate 
  is 1 to 2 inches in 1 hour. Additional rainfall amounts of 0.5 to 
  1.5 inches are possible in the warned area. Flash flooding is 
  ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar and automated gauges.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets, and underpasses as well as other
           drainage and low lying areas.

* Some locations that may experience flash flooding include...
  Long Branch, Asbury Park, Sandy Hook, Tinton Falls, Red Bank, 
  Elberon, Navesink, Lincroft, Collingwood Park, Eatontown, West 
  Long Branch and Rumson.

This includes Garden State Parkway between mile markers 101 and 112.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4043 7400 4045 7399 4045 7400 4047 7402
      4048 7402 4048 7401 4044 7398 4039 7389
      4019 7395 4022 7417 4044 7410 4042 7406
      4042 7403 4041 7404 4040 7398 4042 7398
      4043 7399 4041 7399

FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR

$$

Cooper
2 follow-up statements
946 
WGUS71 KPHI 072330
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
730 PM EDT Fri Aug 7 2026

NJC025-080145-
/O.CON.KPHI.FF.W.0116.000000T0000Z-260808T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monmouth NJ-
730 PM EDT Fri Aug 7 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM EDT THIS 
EVENING FOR NORTHEASTERN MONMOUTH COUNTY...

At 730 PM EDT, Doppler radar and automated rain gauges indicated 
heavy rain had fallen across the warned area. Between 1 and 2 inches 
of rain have fallen. Additional rainfall amounts up to 0.5 inches 
are possible in the warned area. Flash flooding is ongoing or 
expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar and automated gauges.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets, and underpasses as well as other
         drainage and low lying areas.

Some locations that may experience flash flooding include...
  Long Branch, Asbury Park, Sandy Hook, Tinton Falls, Red Bank, 
  Elberon, Navesink, Lincroft, Collingwood Park, Eatontown, West 
  Long Branch and Rumson.

This includes Garden State Parkway between mile markers 102 and 112.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 4043 7400 4045 7399 4045 7400 4047 7402
      4048 7402 4048 7401 4044 7398 4039 7389
      4019 7395 4022 7417 4044 7410 4042 7406
      4042 7403 4041 7404 4040 7398 4042 7398
      4043 7399 4041 7399

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

Cooper
128 
WGUS71 KPHI 080135
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
935 PM EDT Fri Aug 7 2026

NJC025-080145-
/O.EXP.KPHI.FF.W.0116.000000T0000Z-260808T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monmouth NJ-
935 PM EDT Fri Aug 7 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 945 PM EDT THIS EVENING FOR 
NORTHEASTERN MONMOUTH COUNTY...

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

&&

LAT...LON 4043 7400 4045 7399 4045 7400 4047 7402
      4048 7402 4048 7401 4044 7398 4039 7389
      4019 7395 4022 7417 4044 7410 4042 7406
      4042 7403 4041 7404 4040 7398 4042 7398
      4043 7399 4041 7399

$$

Gorse

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 2:38 PM EDTSevere Thunderstorm WarningPHISussex50 min
Aug 7, 2:53 PM EDTSevere Thunderstorm WarningPHIWarren67 min
Aug 7, 3:16 PM EDTSevere Thunderstorm WarningPHIWarren44 min
Aug 7, 3:25 PM EDTSevere Thunderstorm WarningPHIWarren65 min
Aug 7, 4:06 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren54 min
Aug 7, 4:24 PM EDTFlash Flood WarningPHISussex, Warren4 hr
Aug 7, 4:42 PM EDTSevere Thunderstorm WarningPHIMonmouth25 min
Aug 7, 4:43 PM EDTSpecial Marine WarningPHI48 min
Aug 7, 4:50 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset and 1 more55 min
Aug 7, 4:56 PM EDTFlash Flood WarningPHIHunterdon, Morris, Sussex, Warren3 hr
Aug 7, 5:01 PM EDTFlash Flood WarningPHIHunterdon, Warren3 hr
Aug 7, 5:01 PM EDTSevere Thunderstorm WarningPHIMercer44 min
Aug 7, 5:18 PM EDTFlash Flood WarningPHIHunterdon, Morris, Somerset, Sussex3 hr
Aug 7, 5:34 PM EDTFlash Flood WarningPHIBurlington, Mercer3 hr
Aug 7, 5:40 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean, Somerset50 min
Aug 7, 5:42 PM EDTFlash Flood WarningPHIMercer, Middlesex, Morris, Somerset3 hr
Aug 7, 5:45 PM EDTSpecial Marine WarningPHI60 min
Aug 7, 5:48 PM EDTSpecial Marine WarningPHI57 min
Aug 7, 6:37 PM EDTSpecial Marine WarningPHI53 min
Aug 7, 7:19 PM EDTAreal Flood WarningPHIWarren4 hr

Nearby

Flash Flood Warnings in New Jersey, 2026Every flash 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.