Alert archive / New Jersey / Areal Flood Advisories in 2021

Areal Flood Advisory 10, NWS Philadelphia/Mount Holly

May 8, 2021Middlesex County, Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood advisory at May 8, 2021, 1:15 PM EDT for Middlesex County, Monmouth County, New Jersey. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
May 8, 2021, 1:15 PM EDT (17:15 UTC)
Expired
May 8, 2021, 2:13 PM EDT
In force
58 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Middlesex County, NJ, Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 58 km from the middle of the area, began a volume at 17:15 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

Brookhaven, NY (KOKX), launched 12:00Z, 5.3 hours before the alert went out and 122 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 2021-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Brookhaven, NY at 12:00Z on 2021-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1728 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
0 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

175 
WGUS81 KPHI 081715
FLSPHI

Flood Advisory
National Weather Service Mount Holly NJ
115 PM EDT Sat May 8 2021

NJC023-025-082015-
/O.NEW.KPHI.FA.Y.0010.210508T1715Z-210508T2015Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-Monmouth NJ-
115 PM EDT Sat May 8 2021

The National Weather Service in Mount Holly has issued a

* Flood Advisory for...
  Northeastern Monmouth County in central New Jersey...
  East Central Middlesex County in northern New Jersey...

* Until 415 PM EDT.

* At 115 PM EDT, Doppler radar indicated heavy rain due to 
  thunderstorms. 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 will experience flooding include...
  Middletown, Old Bridge, Tinton Falls, Holmdel, Red Bank, 
  Keansburg, Matawan, Lincroft, Brownville, Morganville, Keyport, 
  and Strathmore.

This includes the following highways...
	Garden State Parkway between mile markers 109 and 124.

Additional rainfall amounts of 0.5 to 1 inch are expected over the 
area. This additional rain will result in minor flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4047 7429 4047 7427 4046 7426 4045 7421
      4044 7421 4044 7419 4046 7418 4045 7417
      4045 7416 4045 7415 4046 7414 4044 7411
      4044 7408 4032 7408 4035 7430

$$

SFJ
1 follow-up statement
619 
WGUS81 KPHI 081813
FLSPHI

Flood Advisory
National Weather Service Mount Holly NJ
213 PM EDT Sat May 8 2021

NJC023-025-081823-
/O.CAN.KPHI.FA.Y.0010.000000T0000Z-210508T2015Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Middlesex NJ-Monmouth NJ-
213 PM EDT Sat May 8 2021

...FLOOD ADVISORY IS CANCELLED FOR NORTHEASTERN MONMOUTH AND EAST 
CENTRAL MIDDLESEX COUNTIES...

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

LAT...LON 4047 7429 4047 7427 4046 7426 4045 7421
      4044 7421 4044 7419 4046 7418 4045 7417
      4045 7416 4045 7415 4046 7414 4044 7411
      4044 7408 4032 7408 4035 7430

$$

SFJ

The office that day

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

IssuedProductOfficeCountiesLasted
May 8, 11:22 AM EDTSpecial Weather StatementPHIMonmouth38 min
May 8, 1:12 PM EDTSpecial Weather StatementPHIMonmouth33 min
May 8, 1:45 PM EDTSpecial Weather StatementPHIOcean15 min
May 8, 2:01 PM EDTSpecial Weather StatementPHIOcean14 min
May 8, 2:34 PM EDTSmall Craft AdvisoryPHI7 hr
May 8, 2:42 PM EDTSpecial Weather StatementPHIMiddlesex, Monmouth, Morris48 min
May 8, 2:47 PM EDTSpecial Marine WarningPHI31 min
May 8, 3:04 PM EDTSpecial Weather StatementPHISalem26 min
May 8, 3:23 PM EDTSpecial Weather StatementPHISalem37 min
May 8, 3:43 PM EDTSpecial Marine WarningPHI62 min
May 8, 3:46 PM EDTSpecial Weather StatementPHISomerset29 min
May 8, 3:53 PM EDTSpecial Marine WarningPHI56 min
May 8, 4:01 PM EDTSpecial Marine WarningPHI48 min
May 8, 4:16 PM EDTSpecial Weather StatementPHICumberland29 min
May 8, 4:21 PM EDTSpecial Weather StatementPHIHunterdon, Middlesex, Somerset24 min
May 8, 4:28 PM EDTSpecial Marine WarningPHI62 min
May 8, 4:46 PM EDTSpecial Weather StatementPHIHunterdon, Mercer, Middlesex, Somerset29 min
May 8, 5:22 PM EDTSpecial Marine WarningPHI53 min

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.