Alert archive / New Jersey / Special Marine Warnings in 2018

Special Marine Warning 83, NWS Philadelphia/Mount Holly

August 11, 2018

NWS Philadelphia/Mount Holly issued this special marine warning at Aug 11, 2018, 8:02 PM EDT. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 11, 2018, 8:02 PM EDT (00:02 UTC)
Expired
Aug 11, 2018, 9:00 PM EDT
In force
58 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
0.75 in
Wind
40.0 mph

The radar

The Dover AFB radar (KDOX), 54 km from the middle of the area, began a volume at 00:06 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, 0.0 hours before the alert went out and 146 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 2018-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2834 joules per kilogram.LCLEL10008507005003002001001 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 2018-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 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
2834 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
636 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.1

Open this sounding in Storm Lab

The text

As transmitted.

428 
WHUS51 KPHI 120002
SMWPHI
ANZ430-431-120100-
/O.NEW.KPHI.MA.W.0083.180812T0002Z-180812T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
802 PM EDT SAT AUG 11 2018

The National Weather Service in Mount Holly NJ has issued a

* Special Marine Warning for...
  Delaware Bay...

* Until 900 PM EDT.

* At 800 PM EDT, a strong thunderstorm was located over Miah Maull
  Light, moving east at 15 knots.

  HAZARD...Wind gusts to 40 knots and small hail.

  SOURCE...Radar. This storm has a history of producing winds to 34 
           knots at Ship John Shoal earlier.

  IMPACT...Small craft could be damaged in briefly higher winds and 
           suddenly higher waves.

* Locations impacted include...
  Fortesque Beach, Fourteen Foot Bank Light, East Point, Bowers
  Beach, Miah Maull Light, Brandywine Shoal Light, Cross Ledge Light
  and Cape May Point.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor immediately as gusty winds and high waves are
expected.

Frequent lightning is occurring with this storm. If caught on the
open water, stay below deck if possible and keep away from ungrounded
metal objects.

&&

LAT...LON 3933 7523 3931 7522 3931 7516 3927 7520
      3922 7514 3923 7505 3929 7501 3938 7502
      3932 7495 3932 7479 3931 7495 3923 7500
      3920 7500 3918 7489 3912 7483 3910 7489
      3892 7498 3897 7534 3906 7542 3925 7545
TIME...MOT...LOC 0000Z 269DEG 14KT 3916 7518 

HAIL...<.75IN
WIND...40KTS

$$

CMS
2 follow-up statements
868 
FZUS71 KPHI 120046
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
846 PM EDT SAT AUG 11 2018

ANZ430-431-120100-
/O.CON.KPHI.MA.W.0083.000000T0000Z-180812T0100Z/
846 PM EDT SAT AUG 11 2018

...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 900 PM EDT...

For the following areas...
Delaware Bay waters north of East Point NJ to Slaughter Beach DE...
Delaware Bay waters south of East Point NJ to Slaughter Beach DE...

At 845 PM EDT, a strong thunderstorm was located near East Point,
moving east at 15 knots.

HAZARD...Wind gusts 34 knots or greater and small hail.

SOURCE...Radar indicated.

IMPACT...Small craft could be damaged in briefly higher winds and 
         suddenly higher waves.

Locations impacted include...
Brandywine Shoal Light, Fourteen Foot Bank Light and East Point. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to safe harbor immediately as gusty winds and high waves are
expected.

Frequent lightning is occurring with this storm. If caught on the
open water, stay below deck if possible and keep away from ungrounded
metal objects.

&&

LAT...LON 3923 7505 3929 7501 3938 7502 3932 7495
      3923 7500 3920 7500 3918 7489 3912 7483
      3910 7489 3893 7498 3892 7498 3897 7534
TIME...MOT...LOC 0045Z 269DEG 14KT 3916 7495 

HAIL...<.75IN
WIND...>34KTS

$$

CMS
340 
FZUS71 KPHI 120057
MWSPHI

Marine Weather Statement
National Weather Service Mount Holly NJ
857 PM EDT SAT AUG 11 2018

ANZ430-431-120107-
/O.EXP.KPHI.MA.W.0083.000000T0000Z-180812T0100Z/
857 PM EDT SAT AUG 11 2018

...THE SPECIAL MARINE WARNING WILL EXPIRE AT 900 PM EDT...

The affected areas were... 
Delaware Bay waters north of East Point NJ to Slaughter Beach DE...
Delaware Bay waters south of East Point NJ to Slaughter Beach DE...

The thunderstorm has moved out of the area and no longer poses a
significant threat to boaters.

LAT...LON 3923 7505 3929 7501 3938 7502 3932 7495
      3923 7500 3920 7500 3918 7489 3912 7483
      3910 7489 3893 7498 3892 7498 3897 7534
TIME...MOT...LOC 0057Z 269DEG 14KT 3916 7490 

$$

CMS

What forecasters said that day

The local office's own words before this special marine warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this special marine warning went out at Aug 11, 3:55 PM EDT, 4 hours 7 minutes earlier.

Area forecast discussion, Aug 11, 3:55 PM EDT, 4 hours 7 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
355 PM EDT Sat Aug 11 2018

.SYNOPSIS...
A stationary frontal boundary will remain in place across the region
through the beginning of next week. A series of disturbances will
interact with this boundary to produce unsettled weather during this
period. A low pressure system will develop and move northeastward
pushing the front out to sea on Tuesday giving way to drier weather
Wednesday and Thursday. Another frontal system will approach the
region from the west by the end of the week.

&&

.NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
Very complicated and unsettled weather pattern this afternoon and
this evening across the area. Two frontal boundaries are in place
across the east coast this afternoon. One is located offshore of the
New Jersey coast, southward across Delaware and Maryland. Another is
slowly sagging toward the area from the northwest. The fronts will
not move significantly through tonight and end up stalling across
the east coast. In between the two, widespread showers and
thunderstorms have developed this afternoon with daytime instability
and multiple short wave/vorticity impulses moving across the area.
CAPE values built to 1,000-2,000 J/kg across much of the area, with
even higher values across areas farther south. There remains little
in the way of bulk shear across the area, so widespread severe
thunderstorms are not expected. However, with the instability, any
storms that build tall enough could produce some locally gusty winds.

The main concern going through the remainder of the afternoon into
this evening will be the potential for heavy rain and slow
moving/training storms. PW values remain near 2 inches, and the flow
aloft remains weak. So storm motions will overall not be very quick
moving, so heavy rainfall accumulations is possible for some areas.
The Flash Flood Watch remains in effect for those areas where it was
previously, although even those areas not in the Watch could still
experience heavy rain at times this afternoon and evening.

The heaviest of the rain is expected to end later this evening and
toward midnight as the strong short wave/vorticity impulses move to
our northeast. There will still remain a chance of scattered showers
or thunderstorms during the overnight as the air remains very moist.
There may also be some patchy fog/stratus develop late tonight and
toward daybreak Sunday as well due to the added moisture from the
rainfall, light winds, and possible scattered clearing.

&&

.SHORT TERM /6 AM SUNDAY MORNING THROUGH 6 PM SUNDAY/...
Any fog/stratus is expected to begin lifting after sunrise, but may
take a couple of hours to completely burn off/lift. After that
showers and thunderstorms are likely to develop across the area
again during the day Sunday. The frontal boundaries are expected to
remain nearly stationary across the east coast during the day
Sunday. Waves of low pressure are expected to develop along the
front and move toward the area, while several short wave/vorticity
impulses move across the area as well. The short waves are not
forecast to be as strong as Saturday, so the showers and
thunderstorms may not be as widespread. However, with PW values
remaining just below 2 inches, any showers/thunderstorms could
produce locally heavy rainfall.

&&

.LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/...
Sunday night through Monday night...
An upper low is expected to cutoff and become nearly stationary
over the OH-PA-WV border Sunday night through Monday night. At
the surface, models generally keep the quasi-stationary front
near the northern Mid- Atlantic coast as the boundary meanders
somewhere between the I-95 corridor and the coast waters during
this time. The exact location of this boundary will be important
as this will likely be the focus for organized convection and
heavy rainfall once again early next week. Owing to the stagnant
synoptic pattern and prolonged risk of heavy rainfall, it's a
bit challenging to narrow down the time window when the risk for
flash flooding will be greatest. With that said, there is
particular concern for another episode of at least localized
flash flooding during peak heating hours Monday (late morning
thru mid evening). We will continue to highlight this potential
hazard in the HWO and may eventually issue yet another Flash
Flood Watch.

Tuesday through Saturday...
Tuesday begins with a closed upper low progressing slowly
northeastward over Pennsylvania. This low begins to open and
eject toward New England by late Wednesday as a shortwave passes
quickly eastward across eastern Canada. As it does so, a weak
surface low will develop and move northeastward toward New
England which will push the nearly stationary frontal boundary
out to sea. Given the expected location of the low pressure
system just to our north and west, went ahead and pushed PoPs to
low-end likely for our northern and western-most counties on
Tuesday with chance PoPs elsewhere. Expecting coverage of
showers and thunderstorms to be the greatest in these areas.

After the boundary moves out to sea, precip chances diminish
significantly through mid-week, especially Wednesday, as brief upper
ridging passes over the area. Temperatures should generally remain a
few degrees above normal for the period. Expect highs in the upper
80s south and lower 80s toward the northwest with lows in the lower
70s south and mid 60s toward the north and west. A shortwave trough
and accompanying surface low and cold front look to approach the
area by late next week from the Great lakes region. This will bring
the return for diurnal showers and thunderstorms for Friday and
Saturday.

&&

.AVIATION /20Z SATURDAY THROUGH THURSDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

This afternoon and Tonight...Showers and thunderstorms will continue
to develop across the area through this afternoon into this evening.
Heavy rainfall will occur and likely reduce visibilities to IFR.
Ceilings will remain VFR, or MVFR with heaviest showers or
thunderstorms.

Thunderstorms are expected to diminish after sunset, and widespread
shower activity is expected to diminish by 05z. Once showers end,
some fog/stratus may develop late tonight into early morning Sunday
and reduce conditions to MVFR, or IFR in some locations.

Winds will be variable in and around thunderstorms, but the overall
flow is expected to be from the east to southeast around 5-10 knots,
then becoming light and variable overnight.

Sunday...Fog and stratus may begin the day across much of the area,
but will begin to lift and dissipate after sunrise Sunday. Then
VFR conditions are expected for much of the day. However, there
is a chance of showers and thunderstorms, especially during the
afternoon, which could temporarily lead to lower conditions.
Winds on Sunday are expected to be from the east around 5-10
knots.

OUTLOOK...

Sunday night through Tuesday...Variable conditions though VFR should
generally prevail outside of showers and storms. However, with
numerous rounds of showers and storms expected, temporary MVFR or
IFR restrictions possible when terminals experience a direct impact
from convection. Additionally, a more extended period of MVFR CIGs
in low clouds and fog are possible both Sunday night and Monday
night. Winds speeds will be light with a variable direction (E-NE
Sunday night, becoming S-SE Monday afternoon or night and then W on
Tuesday. Low confidence with timing of restrictions from showers and
storms.

Tuesday night through Thursday... General improvement to VFR Tuesday
night. Showers and storms return to the forecast Thursday,
particularly late in the day and over western terminals. W winds 5-
15 kt, becoming S-SW 5-10 kt on Thursday. Moderate confidence.

&&

.MARINE...
Conditions expected to remain below advisory levels tonight through
Sunday, although winds could gust around 20 knots at times this
afternoon and tonight.

Showers/thunderstorms are expected, which will lead to locally
higher winds and waves.

OUTLOOK...

Sunday night through Thursday...Winds and seas generally below SCA
criteria. However, locally higher winds and seas possible with
storms Sunday night through Tuesday.

Rip Currents...

There is a low risk for the development of dangerous rip
currents at New Jersey and Delaware beaches through the
remainder of the weekend.

&&

.TIDES/COASTAL FLOODING...
The combination of the new moon and astronomically higher tides
will result in widespread minor coastal flooding tonight. The
main threat will occur with the high tide cycles this evening
and tonight upper Delaware Bay and tidal Delaware River, which
is the higher of the two tide cycles. A Coastal Flood Advisory
remains in effect for all coastal areas, the NJ and DE
oceanfront, the back bays, Raritan Bay, Delaware Bay, and the
tidal Delaware River due to the widespread minor coastal
flooding anticipated tonight.

There remains the potential for minor coastal flooding with the
evening high tide cycles at least Sunday night, and possibly
Monday night as well.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flash Flood Watch until 1 AM EDT Sunday for PAZ054-055-060>062-
     070-071-101>106.
     Coastal Flood Advisory from 1 AM to 5 AM EDT Sunday for PAZ070-
     071-106.
NJ...Flash Flood Watch until 1 AM EDT Sunday for NJZ001-007>010-
     012>022-025>027.
     Coastal Flood Advisory from 7 PM this evening to 1 AM EDT
     Sunday for NJZ012>014-020>027.
     Coastal Flood Advisory from 10 PM this evening to 2 AM EDT
     Sunday for NJZ016.
     Coastal Flood Advisory from 1 AM to 5 AM EDT Sunday for NJZ015-
     017>019.
DE...Flash Flood Watch until 1 AM EDT Sunday for DEZ001-002.
     Coastal Flood Advisory from 7 PM this evening to 1 AM EDT
     Sunday for DEZ002>004.
     Coastal Flood Advisory from 10 PM this evening to 2 AM EDT
     Sunday for DEZ001.
MD...Flash Flood Watch until 1 AM EDT Sunday for MDZ008-012-015.
MARINE...None.

&&

Synopsis...Staarmann
Near Term...Robertson
Short Term...Robertson
Long Term...Klein/Staarmann
Aviation...Klein/Robertson
Marine...Klein/Robertson
Tides/Coastal Flooding...
Hazardous weather outlook, Aug 11, 4:33 AM EDT, 15 hours 29 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
433 AM EDT Sat Aug 11 2018

NJZ001-007>010-PAZ054-055-060>062-101>105-120845-
Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks-Lehigh-
Northampton-Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-
433 AM EDT Sat Aug 11 2018

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

This Hazardous Weather Outlook is for northern New Jersey,
northwest New Jersey, east central Pennsylvania, northeast
Pennsylvania and southeast Pennsylvania.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Heavy rain with any showers and thunderstorms could lead to
localized flooding Sunday and Monday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ015-017>019-PAZ070-071-106-120845-
Mercer-Gloucester-Camden-Northwestern Burlington-Delaware-
Philadelphia-Lower Bucks-
433 AM EDT Sat Aug 11 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 1 AM TO 5 AM EDT SUNDAY...

This Hazardous Weather Outlook is for central New Jersey, southern
New Jersey and southeast Pennsylvania.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Minor tidal flooding is possible around the time of the evening high
tide on Sunday.

Heavy rain with any showers and thunderstorms could lead to
localized flooding Sunday and Monday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ001-NJZ016-120845-
New Castle-Salem-
433 AM EDT Sat Aug 11 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 2 AM
EDT SUNDAY...

This Hazardous Weather Outlook is for northern Delaware and
southern New Jersey.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Minor tidal flooding is possible around the time of the evening high
tide on Sunday.

Heavy rain with any showers and thunderstorms could lead to
localized flooding Sunday and Monday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

NJZ012>014-120845-
Middlesex-Western Monmouth-Eastern Monmouth-
433 AM EDT Sat Aug 11 2018

...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 1 AM
EDT SUNDAY...

This Hazardous Weather Outlook is for central New Jersey and
northern New Jersey.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Minor tidal flooding is possible around the time of the evening high
tide on Sunday.

Heavy rain with any showers and thunderstorms could lead to
localized flooding Sunday and Monday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

DEZ002>004-NJZ020>027-120845-
Kent-Inland Sussex-Delaware Beaches-Ocean-Cumberland-Atlantic-
Cape May-Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean-
Southeastern Burlington-
433 AM EDT Sat Aug 11 2018

...COASTAL FLOOD ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 1 AM
EDT SUNDAY...

This Hazardous Weather Outlook is for central Delaware, southern
Delaware and southern New Jersey.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Minor tidal flooding is possible around the time of the evening high
tide on Sunday.

Heavy rain with any showers and thunderstorms could lead to
localized flooding Sunday and Monday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

MDZ008-012-015-019-020-120845-
Cecil-Kent MD-Queen Annes-Talbot-Caroline-
433 AM EDT Sat Aug 11 2018

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Today and Tonight.

The probability of widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Heavy rain with any showers and thunderstorms could lead to
localized flooding Sunday and Monday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

ANZ430-431-450>455-120845-
Delaware Bay waters north of East Point NJ to Slaughter Beach DE-
Delaware Bay waters south of East Point NJ to Slaughter Beach DE-
Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 nm-
Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 nm-
Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 nm-
Coastal waters from Great Egg Inlet to Cape May NJ out 20 nm-
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm-
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm-
433 AM EDT Sat Aug 11 2018

This Hazardous Weather Outlook is for Atlantic coastal waters and
Delaware Bay Waters.

.DAY ONE...Today and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

CMS

In the hours before

Local storm report, Aug 11, 7:22 PM EDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
722 PM EDT SAT AUG 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0211 AM     COASTAL FLOOD    WESTVILLE               39.87N  75.13W
08/11/2018                   GLOUCESTER         NJ   DEPT OF HIGHWAYS

            STATE HIGHWAY 47 CLOSED NEAR BROADWAY AVENUE FROM TIDAL
            FLOODING OF THE DELAWARE RIVER.

0305 AM     COASTAL FLOOD    BROOKLAWN               39.88N  75.12W
08/11/2018                   CAMDEN             NJ   DEPT OF HIGHWAYS

            U.S. HIGHWAY 130 SOUTHBOUND CLOSED NEAR COUNTY ROAD 551
            FROM TIDAL FLOODING OF THE DELAWARE RIVER.

0553 AM     FLASH FLOOD      GARFIELD                40.43N  76.04W
08/11/2018                   BERKS              PA   SOCIAL MEDIA

            VEHICLE STUCK IN FLOOD WATERS AND A WATER RESCUE IN
            PROGRESS AT PLUM CREEK ROAD AND BLOOMSBURG ROAD IN PENN
            TWP.

0618 AM     FLOOD            1 WSW WASHINGTON        40.76N  74.99W
08/11/2018                   WARREN             NJ   SOCIAL MEDIA

            FLOODING ON WEST WASHINGTON AVENUE IN WASHINGTON BORO.

0623 AM     FLOOD            1 SE DAUBERVILLE        40.46N  75.97W
08/11/2018                   BERKS              PA   DEPT OF HIGHWAYS

            FLOODING ON STATE HIGHWAY 61 BETWEEN INDIAN MANOR ROAD
            AND BELLEMANS CHURCH ROAD. ALL LANES CLOSED.

0705 AM     FLASH FLOOD      1 NE NORTH PLAINFIELD   40.63N  74.43W
08/11/2018                   SOMERSET           NJ   CO-OP OBSERVER

            MULTIPLE WATER RESCUES OCCURING AT ROUTE 22 AND
            WESTERVELT AVE.

0726 AM     FLASH FLOOD      1 E NORTH PLAINFIELD    40.62N  74.43W
08/11/2018                   SOMERSET           NJ   911 CALL CENTER

            WATER RESCUES OCCURING AT WATCHUNG AVENUE AND PEARL
            STREET.

0819 AM     FLOOD            1 NNW MELROSE           40.50N  74.30W
08/11/2018                   MIDDLESEX          NJ   DEPT OF HIGHWAYS

            GARDEN STATE PARKWAY NORTHBOUND CLOSED AT EXIT 125 -
            CHEVALIER AVENUE. 2 RIGHT LANES BLOCKED DUE TO FLOODING.

1111 AM     FLOOD            1 ESE BRIDLE RUN        40.32N  75.30W
08/11/2018                   BUCKS              PA   DEPT OF HIGHWAYS

            FLOODING IMPACTING BOTH DIRECTIONS OF PA 113 AT
            BETHLEHEM PIKE.

1224 PM     MARINE TSTM WIND SHIP JOHN SHOAL NOS     39.30N  75.38W
08/11/2018  M48 MPH          ANZ430             NJ   NOS PLATFORM

0109 PM     FLOOD            SOMERS POINT            39.32N  74.60W
08/11/2018                   ATLANTIC           NJ   SOCIAL MEDIA

            REPORT WITH PICUTRES OF NEIGHBORHOOD ROADS COVERED IN
            ABOUT A FOOT OF WATER IN SOMERS POINT.

0142 PM     HAIL             KING OF PRUSSIA         40.09N  75.40W
08/11/2018  E0.75 INCH       MONTGOMERY         PA   SOCIAL MEDIA

            DIME SIZE HAIL IN KING OF PRUSSIA. TIME ESTIMATED FROM
            RADAR.

0152 PM     MARINE TSTM WIND OCEAN CITY              39.22N  74.64W
08/11/2018  M46 MPH          CAPE MAY           NJ   WXFLOW

0203 PM     FLASH FLOOD      WASHINGTON PARK         40.10N  75.38W
08/11/2018                   MONTGOMERY         PA   SOCIAL MEDIA

            WATER RESUCE ON CROSSFIELD ROAD.

0208 PM     FLOOD            HAVERFORD VILLAGE       40.00N  75.31W
08/11/2018                   DELAWARE           PA   TRAINED SPOTTER

            HAVERFORD ROAD IS COMPLETELY FLOODED IN ARDMORE TWP.

0224 PM     MARINE TSTM WIND BRANDYWINE SHOAL NOS    38.99N  75.11W
08/11/2018  M43 MPH          ANZ431             NJ   NOS PLATFORM

0232 PM     MARINE TSTM WIND CAPE MAY                38.97N  74.96W
08/11/2018  M43 MPH          CAPE MAY           NJ   WXFLOW

0234 PM     FLOOD            PENCOYD                 40.01N  75.21W
08/11/2018                   MONTGOMERY         PA   DEPT OF HIGHWAYS

            FLOODING ON I-76 WESTBOUND AT EXIT 339.

0235 PM     MARINE TSTM WIND OCEAN CITY              39.22N  74.64W
08/11/2018  M43 MPH          CAPE MAY           NJ   WXFLOW

0236 PM     MARINE TSTM WIND 2 N SEA ISLE CITY       39.17N  74.70W
08/11/2018  M39 MPH          ANZ453             NJ   WEATHERFLOW

0248 PM     MARINE TSTM WIND SHIP JOHN SHOAL NOS     39.30N  75.38W
08/11/2018  M43 MPH          ANZ430             NJ   NOS PLATFORM

0250 PM     FLOOD            2 ESE PALERMO           39.23N  74.63W
08/11/2018                   CAPE MAY           NJ   TRAINED SPOTTER

            STREET FLOODING ALONG WEST AVENUE FROM 52ND STREET TO
            55TH STREET. SOME INTERSECTIONS IMPASSABLE.

0300 PM     FLASH FLOOD      MILFORD TWP             40.42N  75.41W
08/11/2018                   BUCKS              PA   COUNTY OFFICIAL

            WIDESPREAD FLOODING AND FLASH FLOODING ONGOING IN
            NORTHWESTERN BUCKS COUNTY. NUMEROUS ROADS AND BRIDGES
            FLOODED OR WASHED OUT BY FAST MOVING FLOOD WATERS. SOME
            RESIDENTS ARE BEING EVACUATED AWAY FROM QUICKLY RISING
            CREEKS AND STREAMS.

0325 PM     FLASH FLOOD      1 NE LOWER MILFORD TWP  40.48N  75.46W
08/11/2018                   LEHIGH             PA   DEPT OF HIGHWAYS

            LANDSLIDE ON I-476 WESTBOUND. ALL WESTBOUND LANES
            CLOSED.

0341 PM     FLOOD            1 ESE BEN FRANKLIN BRID 39.95N  75.12W
08/11/2018                   CAMDEN             NJ   DEPT OF HIGHWAYS

            RIVER LINE RAIL LINE CLOSED IN BOTH DIRECTIONS BETWEEN
            WALTER RAND TRANSPORTATION CENTER AND WATERFRONT
            ENTERTAINMENT CENTER STATIONS DUE TO FLOODING. CORRECTED
            TIME.

0408 PM     FLOOD            1 ENE SUCCASUNNA        40.86N  74.63W
08/11/2018                   MORRIS             NJ   SOCIAL MEDIA

            TWO VEHICLES TRAPPED IN FLOOD WATERS AT THE
            INTERSECTION OF ROUTE 10 AND SUSSEX TURNPIKE.

0410 PM     FLOOD            UPPER SAUCON TWP        40.54N  75.42W
08/11/2018                   LEHIGH             PA   COUNTY OFFICIAL

            NUMEROUS REPORTS OF FLOODING ACROSS UPPER SAUCON TWP,
            COOPERSBURG, AND LOWER MILFORD TWP WITHIN THE LAST HOUR.

0420 PM     HEAVY RAIN       SPRINGTOWN              40.56N  75.29W
08/11/2018  M2.91 INCH       BUCKS              PA   CO-OP OBSERVER

            OBSERVED RAINFALL SINCE 7AM EDT. THIS IS IN ADDITION TO
            1.14 INCHES THAT FELL BEFORE 7AM EDT. VALUE CORRECTED
            FROM PREVIOUS LSR.

&&

EVENT NUMBER PHI1801228 PHI1801229 PHI1801230 PHI1801231 PHI1801232
PHI1801233 PHI1801234 PHI1801235 PHI1801240 PHI1801244 PHI1801237
PHI1801241 PHI1801245 PHI1801238 PHI1801236 PHI1801246 PHI1801247
PHI1801239 PHI1801248 PHI1801249 PHI1801250 PHI1801251 PHI1801255
PHI1801254 PHI1801243 PHI1801253 PHI1801252 PHI1801242

Staarmann
Local storm report, Aug 11, 7:39 PM EDT, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
739 PM EDT SAT AUG 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0450 PM     HEAVY RAIN       1 WSW BLAZIERS CORNER   40.72N  74.57W
08/11/2018  M2.18 INCH       SOMERSET           NJ   TRAINED SPOTTER

&&

EVENT NUMBER PHI1801256

CMS
Special weather statement, Aug 11, 7:42 PM EDT, 20 minutes before
Special Weather Statement
National Weather Service Mount Holly NJ
742 PM EDT SAT AUG 11 2018

DEZ002-003-MDZ015-019-020-120030-
Inland Sussex-Kent-Queen Anne's-Talbot-Caroline-
742 PM EDT SAT AUG 11 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN SUSSEX...
KENT...TALBOT...CENTRAL QUEEN ANNE'S AND CAROLINE COUNTIES...

At 741 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Dover to near Goldsboro to near
Queen Anne. Movement was southeast at 15 mph.

Winds up to 45 mph are possible with these storms.

These storms will be near...
  Dover, Dover Base Housing, Dover Speedway and Rising Sun-Lebanon
  around 745 PM EDT.
  Hazlettville around 755 PM EDT.
  Bowers around 805 PM EDT.
  Camden and Woodside around 815 PM EDT.
  Viola and Rising Sun around 820 PM EDT.
  Agner around 825 PM EDT.
  Harrington, Federalsburg, Smithville and Andrewsville around 830
  PM EDT.

Other locations impacted by these storms include Barclay, Rodney
Village, Greenwood, Wyoming, Kent Acres, Magnolia, Riverview,
Templeville, Highland Acres and Felton.

Torrential rainfall is occurring with these storms, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is also occurring with these
storms. Lightning can strike 10 miles away from a thunderstorm. Seek
a safe shelter inside a building or vehicle.

LAT...LON 3890 7629 3879 7620 3879 7619 3894 7621
      3891 7630 3914 7597 3924 7558 3921 7539
      3907 7541 3879 7517 3863 7570 3870 7590
      3857 7602 3868 7621 3876 7622 3871 7628
      3878 7629 3877 7632 3867 7634 3876 7638
TIME...MOT...LOC 2341Z 298DEG 14KT 3920 7545 3909 7575 3889 7595

JRK
Local storm report, Aug 11, 7:49 PM EDT, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
749 PM EDT SAT AUG 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0712 PM     MARINE TSTM WIND SHIP JOHN SHOAL NOS     39.30N  75.38W
08/11/2018  M39 MPH          ANZ430             NJ   NOS PLATFORM

&&

EVENT NUMBER PHI1801257

JRK
Local storm report, Aug 11, 7:59 PM EDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
759 PM EDT SAT AUG 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 PM     FLASH FLOOD      2 NW CALAIS CROSSROADS  40.85N  74.62W
08/11/2018                   MORRIS             NJ   NEWSPAPER

            VIDEO CONFIRMATION OF A WATER RESCUE ON THE SUSSEX
            TURNPIKE NEAR RT 10. TIME ESTIMATED FROM RADAR.

&&

EVENT NUMBER PHI1801258

JRK
Local storm report, Aug 11, 8:01 PM EDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
801 PM EDT SAT AUG 11 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 PM     FLASH FLOOD      2 NW CALAIS CROSSROADS  40.85N  74.62W
08/11/2018                   MORRIS             NJ   NEWSPAPER

            VIDEO CONFIRMATION OF A VEHICLE TRAPPED IN HIGH WATER
            UP TO THE BUMPER ON THE SUSSEX TURNPIKE NEAR RT 10. TIME
            ESTIMATED FROM RADAR.

&&

CORRECTED REMARKS

EVENT NUMBER PHI1801258

JRK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 8:48 PM EDTAreal Flood AdvisoryPHIAtlantic, Cape May3 hr
Aug 11, 8:57 PM EDTSpecial Marine WarningPHI63 min
Aug 11, 9:08 PM EDTSpecial Marine WarningPHI67 min
Aug 11, 9:11 PM EDTAreal Flood AdvisoryPHICumberland, Salem81 min
Aug 11, 9:30 PM EDTAreal Flood WarningPHIHunterdon, Mercer, Middlesex, Somerset88 min
Aug 11, 9:57 PM EDTSpecial Marine WarningPHI63 min
Aug 11, 10:28 PM EDTAreal Flood WarningPHIWarren4 hr
Aug 11, 11:04 PM EDTSpecial Marine WarningPHI56 min
Aug 11, 11:58 PM EDTSpecial Marine WarningPHI37 min
Aug 12, 5:28 AM EDTCoastal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 5 more24 hr
Aug 12, 6:17 PM EDTAreal Flood AdvisoryPHICumberland, Salem118 min
Aug 12, 6:32 PM EDTFlash Flood WarningPHICumberland, Salem112 min
Aug 12, 7:53 PM EDTSpecial Marine WarningPHI32 min
Aug 11, 8:57 PM EDTFlash Flood WarningPHISussex3 hr

Nearby

Special Marine Warnings in New Jersey, 2018Every special marine warning 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.