Alert archive / New Jersey / Flood Watches in 2018

Flood Watch 9, NWS Philadelphia/Mount Holly

November 25, 20184 states

NWS Philadelphia/Mount Holly issued this flood watch at Nov 25, 2018, 3:35 PM EST for 4 states. It took effect at Nov 26, 2018, 10:00 AM EST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Nov 25, 2018, 3:35 PM EST (20:35 UTC)
In effect from
Nov 26, 2018, 10:00 AM EST
Expired
Nov 26, 2018, 6:37 PM EST
In force
9 hr
Issued by
NWS Philadelphia/Mount Holly
Flood severity
None
All 23 counties

New Castle County, DE, Cecil County, MD, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 49 km from the middle of the area, began a volume at 20:39 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, 8.6 hours before the alert went out and 200 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 2018-11-25Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2018-11-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939587897Sfc1 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
470 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
169 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

203 
WGUS61 KPHI 252035
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Mount Holly NJ
335 PM EST Sun Nov 25 2018

DEZ001-MDZ008-NJZ001-007>010-012>027-PAZ070-071-101>106-261000-
/O.NEW.KPHI.FA.A.0009.181126T1500Z-181127T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-Cape May-Atlantic Coastal Cape May-Coastal Atlantic-
Coastal Ocean-Southeastern Burlington-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Wilmington, Elkton, Newton, Washington, 
Morristown, Flemington, Somerville, New Brunswick, Freehold, 
Sandy Hook, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jackson, Millville, Hammonton, 
Cape May Court House, Ocean City, Atlantic City, 
Long Beach Island, Wharton State Forest, Media, Philadelphia, 
Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, 
Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville,
and Doylestown
335 PM EST Sun Nov 25 2018

...FLOOD WATCH IN EFFECT FROM MONDAY MORNING THROUGH LATE MONDAY
NIGHT...

The National Weather Service in Mount Holly has issued a

* Flood Watch for portions of northern Delaware, northeast
  Maryland, New Jersey, and southeast Pennsylvania. 

* From Monday morning through late Monday night

* Moderate to heavy rain will move through the watch area Monday
  through Monday evening. Areas within the watch received 3 to 4
  inches of rain Saturday night into Sunday and area creeks,
  streams, and rivers are all running high. Additional, heavy
  rainfall may result in more flooding across the watch area. 

* Leaf clogged drains and coastal flooding could further
  exacerbate flooding issues. River flooding may continue into
  Tuesday, well after the heavy rain has ended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

&&

$$

Meola
4 follow-up statements
194 
WGUS61 KPHI 260809
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
309 AM EST Mon Nov 26 2018



DEZ001-MDZ008-NJZ001-007>010-012>027-PAZ070-071-101>106-261715-
/O.CON.KPHI.FA.A.0009.181126T1500Z-181127T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-Cape May-Atlantic Coastal Cape May-Coastal Atlantic-
Coastal Ocean-Southeastern Burlington-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Wilmington, Elkton, Newton, Washington, 
Morristown, Flemington, Somerville, New Brunswick, Freehold, 
Sandy Hook, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jackson, Millville, Hammonton, 
Cape May Court House, Ocean City, Atlantic City, 
Long Beach Island, Wharton State Forest, Media, Philadelphia, 
Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, 
Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville,
and Doylestown
309 AM EST Mon Nov 26 2018

...FLOOD WATCH REMAINS IN EFFECT FROM 10 AM EST THIS MORNING
THROUGH LATE TONIGHT...

The Flood Watch continues for

* Portions of northern Delaware, northeast Maryland, New Jersey, 
  and southeast Pennsylvania, including the following areas, in 
  northern Delaware, New Castle. In northeast Maryland, Cecil. 
  In New Jersey, Atlantic, Atlantic Coastal Cape May, Camden, 
  Cape May, Coastal Atlantic, Coastal Ocean, Cumberland, Eastern 
  Monmouth, Gloucester, Hunterdon, Mercer, Middlesex, Morris, 
  Northwestern Burlington, Ocean, Salem, Somerset, Southeastern 
  Burlington, Sussex, Warren, and Western Monmouth. In southeast 
  Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, 
  Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and 
  Western Montgomery. 

* From 10 AM EST this morning through late tonight

* Moderate to heavy rain will move through the watch area today
  into this evening. Areas within the watch received 3 to 4 
  inches of rain Saturday night into Sunday and area creeks, 
  streams, and rivers are all running high. Additional, heavy 
  rainfall may result in more flooding across the watch area. 

* Leaf clogged drains and coastal flooding could further 
  exacerbate flooding issues. River flooding may continue into 
  Tuesday, well after the heavy rain has ended. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

&&

$$

Fitzsimmons
488 
WGUS61 KPHI 261510
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
1010 AM EST Mon Nov 26 2018

DEZ001-MDZ008-NJZ001-007>010-012>027-PAZ070-071-101>106-262315-
/O.CON.KPHI.FA.A.0009.000000T0000Z-181127T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-Cape May-Atlantic Coastal Cape May-Coastal Atlantic-
Coastal Ocean-Southeastern Burlington-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Wilmington, Elkton, Newton, Washington, 
Morristown, Flemington, Somerville, New Brunswick, Freehold, 
Sandy Hook, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jackson, Millville, Hammonton, 
Cape May Court House, Ocean City, Atlantic City, 
Long Beach Island, Wharton State Forest, Media, Philadelphia, 
Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, 
Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville,
and Doylestown
1010 AM EST Mon Nov 26 2018

...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

The Flood Watch continues for

* Portions of northern Delaware, northeast Maryland, New Jersey, 
  and southeast Pennsylvania, including the following areas, in 
  northern Delaware, New Castle. In northeast Maryland, Cecil. 
  In New Jersey, Atlantic, Atlantic Coastal Cape May, Camden, 
  Cape May, Coastal Atlantic, Coastal Ocean, Cumberland, Eastern 
  Monmouth, Gloucester, Hunterdon, Mercer, Middlesex, Morris, 
  Northwestern Burlington, Ocean, Salem, Somerset, Southeastern 
  Burlington, Sussex, Warren, and Western Monmouth. In southeast 
  Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, 
  Lower Bucks, Philadelphia, Upper Bucks, Western Chester, and 
  Western Montgomery. 

* Through late tonight

* Moderate to heavy rain will move through the watch area today
  into this evening. A half inch to one and one-half inches are
  expected. The rain will fall over the same areas that received
  three to four inches of rain Saturday night into Sunday. Area
  creeks, streams, and rivers are already running high with a few
  still above flood stage. Additional heavy rainfall will likely 
  result in more flooding across the watch area. 

* Leaf clogged drains and coastal flooding could further
  exacerbate flooding issues. River flooding may continue into
  Wednesday or Thursday, well after the heavy rain has ended. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

&&

$$

Kruzdlo
975 
WGUS61 KPHI 262236
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
536 PM EST Mon Nov 26 2018

DEZ001-MDZ008-NJZ001-007>010-012>027-PAZ070-071-101>106-270600-
/O.CON.KPHI.FA.A.0009.000000T0000Z-181127T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-Cape May-Atlantic Coastal Cape May-Coastal Atlantic-
Coastal Ocean-Southeastern Burlington-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Wilmington, Elkton, Newton, Washington, 
Morristown, Flemington, Somerville, New Brunswick, Freehold, 
Sandy Hook, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jackson, Millville, Hammonton, 
Cape May Court House, Ocean City, Atlantic City, 
Long Beach Island, Wharton State Forest, Media, Philadelphia, 
Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, 
Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville,
and Doylestown
536 PM EST Mon Nov 26 2018

...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 AM EST TUESDAY...

The Flood Watch continues for

* Portions of New Jersey, southeast Pennsylvania, northern
  portions of northeast maryland, and northern Delaware. 

* Until 1 AM EST Tuesday

* Moderate to heavy rain will move through the watch area through
  this evening. A half inch to one and one-half inches are 
  expected. The rain will fall over the same areas that received 
  three to four inches of rain Saturday night into Sunday. Area 
  creeks, streams, and rivers are already running high with a few 
  still above flood stage. Additional heavy rainfall will likely 
  result in more flooding across the watch area. 

* Leaf clogged drains and coastal flooding could further 
  exacerbate flooding issues. River flooding may continue into 
  Wednesday or Thursday, well after the heavy rain has ended. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Watch means there is a potential for flooding based on
current forecasts.

You should monitor later forecasts and be alert for possible
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

&&

$$

MPS
928 
WGUS61 KPHI 262337
FFAPHI

Flood Watch
National Weather Service Mount Holly NJ
637 PM EST Mon Nov 26 2018

DEZ001-MDZ008-NJZ001-007>010-012>027-PAZ070-071-101>106-270045-
/O.CAN.KPHI.FA.A.0009.000000T0000Z-181127T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle-Cecil-Sussex-Warren-Morris-Hunterdon-Somerset-
Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-
Gloucester-Camden-Northwestern Burlington-Ocean-Cumberland-
Atlantic-Cape May-Atlantic Coastal Cape May-Coastal Atlantic-
Coastal Ocean-Southeastern Burlington-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
Including the cities of Wilmington, Elkton, Newton, Washington, 
Morristown, Flemington, Somerville, New Brunswick, Freehold, 
Sandy Hook, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, 
Moorestown, Mount Holly, Jackson, Millville, Hammonton, 
Cape May Court House, Ocean City, Atlantic City, 
Long Beach Island, Wharton State Forest, Media, Philadelphia, 
Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, 
Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville,
and Doylestown
637 PM EST Mon Nov 26 2018

...FLOOD WATCH IS CANCELLED...

The Flood Watch for portions of northern Delaware, northeast
Maryland, New Jersey, and southeast Pennsylvania has been
cancelled.

The heavy rain has ended, therefore widespread roadway flooding 
is no longer expected. However, there are still some flood watches
and flood advisories in effect. Some of the larger and slower 
responding rivers will also continue to experience rises. Please 
continue to heed any road closures. If you encounter any flooded 
roads, turn around and don't drown!

$$

MPS

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 24, 7:43 PM ESTSpecial Marine WarningPHI92 min
Nov 24, 7:54 PM ESTAreal Flood AdvisoryPHIMercer, Middlesex, Monmouth, Ocean8 hr
Nov 24, 8:13 PM ESTAreal Flood AdvisoryPHIHunterdon, Morris, Somerset, Warren8 hr
Nov 24, 9:09 PM ESTGale WarningPHI10 hr
Nov 24, 11:01 PM ESTHigh Wind WarningPHIAtlantic, Burlington, Cape May, Ocean5 hr
Nov 24, 11:01 PM ESTWind AdvisoryPHICumberland, Monmouth5 hr
Nov 24, 11:13 PM ESTStorm WarningPHI5 hr
Nov 24, 11:24 PM ESTAreal Flood WarningPHIHunterdon11 hr
Nov 25, 12:20 AM ESTRiver Flood WarningPHIMercer14 hr
Nov 25, 12:27 AM ESTAreal Flood AdvisoryPHIBurlington, Camden2 hr
Nov 25, 12:46 AM ESTRiver Flood WarningPHIHunterdon, Somerset14 hr
Nov 25, 1:30 AM ESTAreal Flood WarningPHIHunterdon, Somerset10 hr
Nov 25, 1:35 AM ESTAreal Flood WarningPHIBurlington, Camden6 hr
Nov 25, 2:23 AM ESTRiver Flood WarningPHISomerset13 hr
Nov 25, 2:27 AM ESTRiver Flood WarningPHISomerset66 hr
Nov 25, 2:32 AM ESTRiver Flood WarningPHIBurlington5 days
Nov 25, 3:32 AM ESTAreal Flood WarningPHIWarren6 hr
Nov 25, 3:43 AM ESTRiver Flood WarningPHIEssex, Morris, Passaic10 days
Nov 25, 3:51 AM ESTRiver Flood WarningPHIMiddlesex, Somerset21 hr
Nov 25, 3:51 AM ESTRiver Flood WarningPHIMiddlesex, Somerset23 hr
Nov 25, 4:08 AM ESTSmall Craft AdvisoryPHI18 hr
Nov 25, 4:59 AM ESTAreal Flood WarningPHIBurlington38 hr
Nov 25, 5:00 AM ESTCoastal Flood AdvisoryPHIMiddlesex, Monmouth, Ocean5 hr
Nov 25, 7:28 AM ESTAreal Flood WarningPHIBurlington, Camden4 hr
Nov 25, 7:48 AM ESTAreal Flood WarningPHIMonmouth, Ocean18 hr
Nov 25, 9:29 AM ESTAreal Flood WarningPHIWarren24 hr
Nov 25, 9:39 AM ESTCoastal Flood WarningPHIMiddlesex, Monmouth, Ocean5 hr
Nov 25, 9:39 AM ESTCoastal Flood AdvisoryPHIAtlantic, Burlington, Cape May5 hr
Nov 25, 3:02 PM ESTRiver Flood WarningPHIMorris14 hr
Nov 25, 3:25 PM ESTCoastal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more34 hr
Nov 25, 3:49 PM ESTGale WatchPHI11 hr
Nov 24, 9:57 PM ESTRiver Flood WarningPHIChester8 hr
Nov 24, 10:15 PM ESTAreal Flood WarningPHIChester, Delaware6 hr
Nov 24, 10:34 PM ESTRiver Flood WarningPHIDelaware5 hr
Nov 24, 11:33 PM ESTAreal Flood WarningPHIMontgomery, Philadelphia12 hr
Nov 24, 11:36 PM ESTAreal Flood WarningPHIChester6 hr
Nov 25, 12:05 AM ESTAreal Flood WarningPHIBucks12 hr
Nov 25, 12:13 AM ESTRiver Flood WarningPHIMontgomery10 hr
Nov 25, 12:16 AM ESTRiver Flood WarningPHIChester, Delaware15 hr
Nov 25, 1:47 AM ESTRiver Flood WarningPHIBucks12 hr
Nov 25, 2:54 AM ESTRiver Flood WarningPHIChester, Montgomery, Philadelphia21 hr
Nov 25, 2:54 AM ESTRiver Flood WarningPHIMontgomery, Philadelphia17 hr
Nov 24, 8:03 PM ESTRiver Flood WarningPHINew Castle8 hr
Nov 24, 9:14 PM ESTRiver Flood WarningPHINew Castle8 hr
Nov 24, 10:08 PM ESTRiver Flood WarningPHINew Castle6 hr

Nearby

Flood Watches in New Jersey, 2018Flood Watches in Pennsylvania, 2018Flood Watches in Delaware, 2018Every flood watch in 2018

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.