Alert archive / Pennsylvania / Areal Flood Warnings in 2020

Areal Flood Warning 61, NWS Philadelphia/Mount Holly

December 25, 2020Bucks County, Philadelphia County, Pennsylvania; Burlington County, Camden County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Dec 25, 2020, 1:56 AM EST for Bucks County, Philadelphia County, Pennsylvania; Burlington County, Camden County, New Jersey. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Dec 25, 2020, 1:56 AM EST (06:56 UTC)
Expired
Dec 25, 2020, 8:51 AM EST
In force
7 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Burlington County, NJ, Camden County, NJ, Bucks County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 46 km from the middle of the area, began a volume at 06:59 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 00:00Z, 6.9 hours before the alert went out and 198 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 00:00Z on 2020-12-25Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2020-12-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 682 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
784 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
682 m²/s²
0-3 km storm-relative helicity
727 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

669 
WGUS41 KPHI 250656
FLWPHI

BULLETIN - EAS ACTIVATION REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
156 AM EST Fri Dec 25 2020

NJC005-007-PAC017-101-251100-
/O.NEW.KPHI.FA.W.0061.201225T0656Z-201225T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Bucks PA-Philadelphia PA-
156 AM EST Fri Dec 25 2020

The National Weather Service in Mount Holly has issued a

* Flood Warning for...
  Northwestern Burlington County in southern New Jersey...
  Northwestern Camden County in southern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...
  Central Philadelphia County in southeastern Pennsylvania...

* Until 600 AM EST.

* At 156 AM EST, gauge reports indicated flooding was beginning on 
  Pennypack Creek in Philadelphia. Law enforcement has also reported 
  flooding on Route 70 in Camden County. Flooding is ongoing or 
  expected to begin shortly in the warned area.

For Pennypack Creek at Pennypack:
At 1:45am the stage was 7.02 feet.
Flood Stage is 7 feet.
...
For Cooper at Haddonfield:
At 1:00am the stage was 2.63 feet.
Flood Stage is 4.5 feet.

This includes the following highways...
	New Jersey Turnpike between exits 3 and 7A.
	Pennsylvania Turnpike between exits 348 and 351...and
	between exits 353 and 359.
	Interstate 95 in Pennsylvania between mile markers 25 and 40.
	Interstate 76 in New Jersey between mile markers 0 and 3.
	Interstate 295 in New Jersey between mile markers 26 and 57.
	Interstate 676 in New Jersey between mile markers 0 and 3.
	Atlantic City Expressway between mile markers 39 and 44.

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 4011 7505 4014 7502 4015 7504 4015 7503
      4013 7495 4025 7484 4022 7477 4019 7475
      4015 7472 4018 7470 4015 7465 3971 7498
      3972 7502 3975 7502 3982 7509 3984 7508
      3989 7514

$$

CMS
3 follow-up statements
071 
WGUS81 KPHI 250936
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
436 AM EST Fri Dec 25 2020

NJC005-007-PAC017-101-251100-
/O.CON.KPHI.FA.W.0061.000000T0000Z-201225T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Bucks PA-Philadelphia PA-
436 AM EST Fri Dec 25 2020

...FLOOD WARNING REMAINS IN EFFECT UNTIL 6 AM EST EARLY THIS MORNING 
FOR NORTHWESTERN BURLINGTON, NORTHWESTERN CAMDEN, SOUTHEASTERN 
BUCKS, AND CENTRAL PHILADELPHIA COUNTIES...

At 436 AM EST, gauge reports indicated flooding continuing on 
Pennypack Creek in Philadelphia. Portions of Route 70 in Cherry Hill 
remain closed from flooding as well. Flooding will likely continue 
for the next few hours.

For Pennypack Creek at Pennypack:
At 4:22am the stage was 8.27 feet.
Flood Stage is 7 feet.

For Cooper River at Haddonfield:
At 4:00am the stage was 3.22 feet.
Flood Stage is 4.5 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4011 7505 4014 7502 4015 7504 4015 7503
      4013 7495 4025 7484 4022 7477 4019 7475
      4015 7472 4018 7470 4015 7465 3971 7498
      3972 7502 3975 7502 3982 7509 3984 7508
      3989 7514

$$

CMS
502 
WGUS41 KPHI 251018
FLWPHI

BULLETIN - EAS ACTIVATION REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
518 AM EST Fri Dec 25 2020

NJC005-007-PAC017-101-251400-
/O.EXT.KPHI.FA.W.0061.000000T0000Z-201225T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Bucks PA-Philadelphia PA-
518 AM EST Fri Dec 25 2020

The National Weather Service in Mount Holly has extended the

* Flood Warning for...
  Northwestern Burlington County in southern New Jersey...
  Northwestern Camden County in southern New Jersey...
  Southeastern Bucks County in southeastern Pennsylvania...
  Central Philadelphia County in southeastern Pennsylvania...

* Until 900 AM EST.

* At 518 AM EST, gauge reports flooding continuing on Pennypack 
  Creek. Law enforcement also continues to report road closures on 
  Route 70 in Cherry Hill in Camden County. Flooding will likely 
  continue for a few more hours.

For Cooper at Haddonfield:
At 5:00am the stage was 3.15 feet.
Flood Stage is 4.5 feet.
...
For Pennypack Creek at Pennypack:
At 5:07am the stage was 8.43 feet.
Flood Stage is 7 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4011 7505 4014 7502 4015 7504 4015 7503
      4013 7495 4025 7484 4022 7477 4019 7475
      4015 7472 4018 7470 4015 7465 3971 7498
      3972 7502 3975 7502 3982 7509 3984 7508
      3989 7514

$$

CMS
595 
WGUS81 KPHI 251351
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
851 AM EST Fri Dec 25 2020

NJC005-007-PAC017-101-251401-
/O.CAN.KPHI.FA.W.0061.000000T0000Z-201225T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Bucks PA-Philadelphia PA-
851 AM EST Fri Dec 25 2020

...FLOOD WARNING IS CANCELLED FOR NORTHWESTERN BURLINGTON, 
NORTHWESTERN CAMDEN, SOUTHEASTERN BUCKS, AND CENTRAL PHILADELPHIA 
COUNTIES...

The heavy rain is coming to an end. The Flood Warning has been 
cancelled.

LAT...LON 4011 7505 4014 7502 4015 7504 4015 7503
      4013 7495 4025 7484 4022 7477 4019 7475
      4015 7472 4018 7470 4015 7465 3971 7498
      3972 7502 3975 7502 3982 7509 3984 7508
      3989 7514

$$

Kruzdlo

What forecasters said that day

The local office's own words before this areal flood 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 areal flood warning went out at Dec 24, 11:10 PM EST, 2 hours 46 minutes earlier.

Area forecast discussion, Dec 24, 11:10 PM EST, 2 hours 46 minutes before
Area Forecast Discussion
National Weather Service Mount Holly NJ
1110 PM EST Thu Dec 24 2020

.SYNOPSIS...
A strong and complex storm will affect the region tonight and
into Friday. This storm will weaken and move away over the weekend
as high pressure builds over the area. Another low will cross
north of the area Monday causing a cold front to cross our region.
More high pressure is expected for the middle of next week.

&&

.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
Winds continue to escalate quickly. Expanded the high wind
warning to include New Castle (ILG has already had gusts above
50 kt), Salem, Gloucester, Camden and all of Burlington County.

Center of the 500 mb closed low is over IL now, with the trough
axis extending all the way down to the Gulf. There are two
surface lows, one centered over Quebec, the secondary low
has lifted all the way into western MD/PA from the Carolinas
just over the past few hours. The cold front currently over
western PA is expected to rapidly sweep east as we go through
the night.

Southerly flow should increase through the evening. As mentioned
above though, it is slightly behind schedule. Dew points are
already in the 50s, and could get close to 60 F just ahead of
the front. This will yield PWATs between 1.3-1.5 inches, which
is over 300% of normal for this time of the year. Heavier rain
will move into the western zones by early this evening, and then
several rounds of heavy rain will affect the region into the
overnight.

Storm total QPF forecast remains about what the forecast had previously
had, which is generally 1-2 inches throughout, and the highest amounts
will be in the Lehigh Valley, southeast Pennsylvania, and northern
New Jersey. For the southern Poconos, storm total rainfall will
average 3-4 inches. Up to 2 inches is possible for the New Jersey
coast. For more on the flooding potential, please see the Hydrology
section below.

Winds between 925 mb-850 mb will average 70-90 kt tonight, and
with heavy rain and a tight pressure gradient, a good deal of
those winds will mix down, especially along the coastal areas.
Even back towards southeast Pennsylvania, the LLJ will average
50-70 kt winds. The High Wind Warnings and Wind Advisories
remain in effect for most of the areas, but will make one
change. Currently expecting 60-70 mph winds along the barrier
island of New Jersey and into coastal portions of mainland New
Jersey, as well into Sussex county, Delaware. Will upgrade from
Wind Advisory to a High Wind Warning there. For the rest of the
region, maximum wind gusts will range from 45-55 mph.

With the warm and humid air spreading into the region, surface
instability parameters remain fairly low, but MUCAPE values are
projected to be from 100-200 J/kg, but as much as 500 J/kg in
portions of southern New Jersey. 0-6 km Bulk Shear will range
from 70-80 kt. SPC Day 1 outlook has the southern half of the
forecast area in a Marginal risk for severe weather, and several
stronger cells, or even broken line segments may form and that
would mix down the damaging wind gusts mentioned above. NAM-3km
showing a squall line developing, and this is reflected in the
HRRR as well. Will go ahead and add a chance for thunder to the
southern half of the forecast area. That could mix down
damaging winds that are stronger than forecast in the Wind
Advisory and High Wind Warning areas.

The heaviest of the rain should be just offshore by the time this
period ends. Temps this evening and into most of the night
will remain warm, generally in the 50s and low 60s.

&&

.SHORT TERM /6 AM FRIDAY MORNING THROUGH 6 PM FRIDAY/...
The bulk of the rain ends fairly abruptly Friday morning, and models
continue to indicate a dry slot sliding up the coast. CAA will be
underway in the morning as low pressure departs and a cold front
works its way through the region. Temps drop off even further during
the day as a stronger cold front passes through in the afternoon. As
the cold air surges east, temps will drop during the day, but
probably not below freezing until towards the evening. With the
passage of the front, as well as with the strong shortwave energy
approaching from the west, cannot rule out scattered rain and/or
snow showers into the afternoon hours. The high temperature for the
day will likely occur between midnight-2am.

&&

.LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/...
The upper pattern continues to remain fairly amplified and
progressive during the long term part of the forecast.

The system from the near/short term parts of the forecast will
continue to exit off to the northeast Fri night/Sat leaving only
some scattered snow showers across the higher elevations of the
Southern Poconos and northwest NJ for the evening Friday. The
coldest of the airmass will be settling across the area, so below
normal temps and a chilly wind will be over the region. Lows Fri
night will be in the teens/low 20s over the northern areas and
mostly low/mid 20s for Delmarva, srn NJ and metro Philadelphia. Wind
chills will take about ten degrees off these air temperature values.

Saturday and Sunday both looks dry at this point with high pressure
settling across the region. Temperatures will be cold Saturday but
moderate back close to normal by Sunday.

Another low and upper air feature will pass north of the region
Monday with high pressure building in again Tuesday. While
widespread precipitation is not expected with the system Monday, a
couple scattered rain/snow showers will accompany the trailing
fronts. Temperatures will reach the 40s regionwide Monday, but then
drop back below normal (mostly 30s) Tuesday following a cold front.

After a fair weather day Wednesday, most forecast models are showing
another potent low developing across the middle part of the country
and tracking towards the Great Lakes later Wed/Thu. This
patters kinda looks like the present system, perhaps weaker with
a maturing cyclone and strong cold front to cross the MIddle
Atlantic perhaps later Thu into Friday. Too early for specifics,
but it could get very warm preceding the system and this is
reflected in out high temps for Thu being in the 50s for many
areas. We will go along with the NBM guidance for now with chc
pops for Wed night/Thu/Thu night.

&&

.AVIATION /04Z FRIDAY THROUGH TUESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.

Through tonight... Conditions will continue to deteriorate from west
to east through this evening, due both to lower ceilings and
visibility restrictions in rain. For most of the overnight
hours, mainly IFR or low end MVFR is expected with rain, which
could be heavy at times. Rain may begin to diminish by late in
the night from west to east. South- southeast winds will
continue to increase overnight, with speeds of 20 to 25 kt and
gusts of 35 to 45 kt expected in most areas, a little higher
near MIV and ACY. LLWS will continue although the increasing
surface winds will mitigate it somewhat, especially near and
west of PHL where winds aloft will not be as strong. Surface
winds should turn more southerly with time and become more
southwest during the predawn hours, with speeds also beginning
to decrease during the predawn hours. Moderate confidence on the
overall pattern, but low confidence on the timing.

Friday... Mainly MVFR to begin the day with ceilings of 1000 to
2000 ft lingering even after the rain pulls away, which should
occur from west to east between 12z and 15z. MVFR should
continue for most of the morning and likely into the early
afternoon. Low clouds may begin to lift and/or scatter out by
mid to late afternoon, which could allow VFR conditions to
develop. Winds will be southwest shifting to west-southwest at
10 to 15 kt with gusts to 20 kt, except a little stronger near
the coast. Moderate confidence.

Outlook...

Fri night thru Sun night...VFR expected. Gusty winds Fri night
and Saturday.

Mon/Mon night...Mostly VFR. Scattered showers mostly N/W.

Tue...VFR expected.

&&

.MARINE...
Tonight...Winds this evening will quickly ramp up to Storm Force on
all waters, and will expand the Storm Warning to include upper DE
Bay. Sustained winds of 35-45 kts are expected with gusts of 50-60
kt are expected with the passage of low pressure. Visibility
restrictions likely in heavy rain and fog. Seas across the ocean
waters will build to 10-20 feet.

Friday...Winds abruptly shift to the west early, and decease to 20-
30 kt with 30-40 kt gusts. Going into midday, conditions lower to
SCA levels and should remain at SCA levels through the
afternoon.

Outlook...

Fri night thru Saturday...SCA conditions continuing on the
waters diminishing late. Fair weather.

Sat night thru Sunday night...sub-SCA expected. Fair.

Monday thru Tue...SCA expected. Scattered showers Mon mostly north.

Tue night into Wed...sub-SCA expected. Fair.

&&

.HYDROLOGY...
A widespread 1-3" of rain will fall with 2-4" in the southern
Poconos. There is about an inch of liquid equivalent in the snowpack
across interior portions of southeast Pennsylvania and northern New
Jersey. This snowpack should rapidly melt into tonight due to the
combination of the warm temps and heavy rain. Flooding will develop
on the smaller smaller streams and creeks, and there will be rises
on the mainstem rivers. In addition, urban and poor drainage
flooding is likely to develop. A Flood Watch remains in effect for
all of southeast Pennsylvania and northern New Jersey.

After the rain ends Friday morning, is is likely that rises on area
rivers and streams will continue into Friday afternoon and Friday
night. Several forecast points, including along the Macopin,
Raritan, Passaic, and Schuylkill Rivers will approach and may go
over minor flood stage, and the Millstone River at Blackwell Mills
is expected to crest at moderate flood stage.

&&

.TIDES/COASTAL FLOODING...
Update: a coastal flood advisory has been issued for Kent County
MD as Tolchester is now expected to be above advisory levels
with the high tide overnight.

A strong southerly wind is expected for tonight. As a result, the
most susceptible locations in our region for any tidal flooding will
be our counties on the eastern shore of Chesapeake Bay, areas around
Barnegat Bay in New Jersey, and areas around Little Assawoman Bay in
southeastern Delaware.

The strong southerly flow is forecast to continue until about 3:00
to 5:00 AM on Chesapeake Bay. As of mid afternoon, the surge had
built to about 1 foot on parts of the lower bay. The astronomical
high tides will be running particularly low as we move away from the
first quarter moon phase. As a result, it will take a surge of 2.5
to 3.0 feet to cause even spotty minor tidal flooding in the
counties of Talbot, Caroline, and Queen Anne's. We will
forecast that scenario for now, and we will continue to monitor
trends on Chesapeake Bay. The high tide works its way northward
through our counties on the eastern shore between about midnight
and 5:00 AM, so we still have a little time in case we find
that we need to issue an advisory.

The southerly flow is anticipated to persist until around daybreak
of the oceanfront. The usual situation in this type of pattern is
that water becomes trapped in Little Assawoman Bay in southeastern
Delaware, and in Barnegat Bay in New Jersey. It seems likely that we
will eventually need a Coastal Flood Statement for those areas at
some point from late tonight into Friday.

Our remaining tidal areas in New Jersey and Delaware, and those
along Delaware Bay and the tidal Delaware River should experience no
more than some spotty minor tidal flooding. The more significant
flood potential will come from the heavy rainfall.

&&

.EQUIPMENT...
Data quality errors at the KDOX radar site are making the
reflectivity and radar estimated precipitation look worse than
it actually is. Technicians are aware of the issue and working
to resolve it.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Flood Watch through Friday morning for PAZ054-055-060>062-070-
     071-101>106.
     Wind Advisory until 7 AM EST Friday for PAZ054-055-060>062-070-
     071-101>106.
NJ...Flood Watch through Friday morning for NJZ001-007>010-012-015.
     Wind Advisory until 7 AM EST Friday for NJZ001-007>010-012-015.
     High Wind Warning until 7 AM EST Friday for NJZ013-014-016>027.
DE...Flood Watch through Friday morning for DEZ001.
     High Wind Warning until 7 AM EST Friday for DEZ001>004.
MD...Wind Advisory until 7 AM EST Friday for MDZ012-015-019-020.
     Coastal Flood Advisory until 6 AM EST Friday for MDZ012.
MARINE...Storm Warning until 7 AM EST Friday for ANZ430-431-450>455.

&&

Synopsis...CMS/O'Hara
Near Term...Johnson/MPS
Short Term...MPS
Long Term...O'Hara
Aviation...Johnson/O'Brien/O'Hara
Marine...MPS/O'Hara
Hydrology...WFO PHI
Tides/Coastal Flooding...WFO PHI
Equipment...WFO PHI
Hazardous weather outlook, Dec 24, 11:12 PM EST, 2 hours 44 minutes before
Hazardous Weather Outlook
National Weather Service Mount Holly NJ
1112 PM EST Thu Dec 24 2020

NJZ001-007>010-012-015-PAZ054-055-060>062-070-071-101>106-260415-
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Mercer-Carbon-
Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia-
Western Chester-Eastern Chester-Western Montgomery-
Eastern Montgomery-Upper Bucks-Lower Bucks-
1112 PM EST Thu Dec 24 2020

...WIND ADVISORY IN EFFECT UNTIL 7 AM EST FRIDAY...
...FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

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

.DAY ONE...Tonight.

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

   Flood Watch.
   Wind Advisory.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

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

   Flood Watch.
   Wind Advisory.

.SPOTTER INFORMATION STATEMENT...

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

MDZ012-260415-
Kent MD-
1112 PM EST Thu Dec 24 2020

...WIND ADVISORY IN EFFECT UNTIL 7 AM EST FRIDAY...
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 6 AM EST FRIDAY...

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Tonight.

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

   Wind Advisory.
   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

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

   Wind Advisory.

.SPOTTER INFORMATION STATEMENT...

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

MDZ015-019-020-260415-
Queen Annes-Talbot-Caroline-
1112 PM EST Thu Dec 24 2020

...WIND ADVISORY IN EFFECT UNTIL 7 AM EST FRIDAY...

This Hazardous Weather Outlook is for northeast Maryland.

.DAY ONE...Tonight.

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

   Wind Advisory.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

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

   Wind Advisory.

.SPOTTER INFORMATION STATEMENT...

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

DEZ002>004-NJZ013-014-016>027-260415-
Kent-Inland Sussex-Delaware Beaches-Western Monmouth-
Eastern Monmouth-Salem-Gloucester-Camden-Northwestern Burlington-
Ocean-Cumberland-Atlantic-Cape May-Atlantic Coastal Cape May-
Coastal Atlantic-Coastal Ocean-Southeastern Burlington-
1112 PM EST Thu Dec 24 2020

...HIGH WIND WARNING IN EFFECT UNTIL 7 AM EST FRIDAY...

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

.DAY ONE...Tonight.

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

   High Wind Warning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

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

   High Wind Warning.

.SPOTTER INFORMATION STATEMENT...

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

DEZ001-260415-
New Castle-
1112 PM EST Thu Dec 24 2020

...HIGH WIND WARNING IN EFFECT UNTIL 7 AM EST FRIDAY...
...FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

This Hazardous Weather Outlook is for northern Delaware.

.DAY ONE...Tonight.

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

   High Wind Warning.
   Flood Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

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

   High Wind Warning.
   Flood Watch.

.SPOTTER INFORMATION STATEMENT...

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

ANZ430-431-450>455-260415-
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-
1112 PM EST Thu Dec 24 2020

...STORM WARNING IN EFFECT UNTIL 7 AM EST FRIDAY...

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

.DAY ONE...Tonight.

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

   Storm Warning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

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

   Storm Warning.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Local storm report, Dec 25, 12:42 AM EST, 1 hour 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1242 AM EST FRI DEC 25 2020

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

1148 PM     NON-TSTM WND DMG 1 NNE SOUTH BRUNSWICK   40.41N 74.54W
12/24/2020                   MIDDLESEX          NJ   LAW ENFORCEMENT

            US ROUTE 1 AT BEEKMAN ROAD CLOSED IN BOTH
            DIRECTIONS DUE TO DOWNED WIRES. HIGH WINDS
            HAVE CAUSED POLES TO BLOW OVER WITH WIRES ON
            THE ROAD.

&&

STAARMANN
Local storm report, Dec 25, 12:50 AM EST, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1250 AM EST FRI DEC 25 2020

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

1154 PM     NON-TSTM WND GST PERTH AMBOY             40.50N 74.26W
12/24/2020  M60 MPH          MIDDLESEX          NJ   MESONET

            MEASURED AT ARTHUR KILL AT PERTH AMBOY HADS
            SITE (PBAN4).

&&

NC
Local storm report, Dec 25, 12:59 AM EST, 57 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1259 AM EST FRI DEC 25 2020

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

1242 AM     NON-TSTM WND DMG 4 SE SERGEANTSVILLE     40.41N 74.88W
12/25/2020                   HUNTERDON          NJ   DEPT OF HIGHWAYS

            DOWNED TREE ON NJ 179 NORTHBOUND SOUTH OF US
            206 (WEST AMWELL TWP) ALL LANES CLOSED.

&&

NC
Local storm report, Dec 25, 1:05 AM EST, 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
105 AM EST FRI DEC 25 2020

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

1244 AM     TSTM WND DMG     2 N HAMBLETON           38.73N 76.07W
12/25/2020                   TALBOT             MD   DEPT OF HIGHWAYS

            US 50 WEST AT LANDING NECK ROAD CLOSED DUE
            TO DEBRIS IN ROADWAY.

&&

NC
Local storm report, Dec 25, 1:33 AM EST, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
133 AM EST FRI DEC 25 2020

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

0102 AM     FLOOD            1 W ELLISBURG           39.92N 75.02W
12/25/2020                   CAMDEN             NJ   DEPT OF HIGHWAYS

            FLOODING ON NJ 70 WESTBOUND EAST OF CR
            627/COOPER LANDING RD (CHERRY HILL TWP) ALL
            LANES CLOSED.

&&

NC
Local storm report, Dec 25, 1:38 AM EST, 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
138 AM EST FRI DEC 25 2020

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

1250 AM     NON-TSTM WND GST 2 E FORT DIX            40.02N 74.59W
12/25/2020  M58 MPH          BURLINGTON         NJ   AWOS

            MEASURED AT MCGUIRE AIR FORCE BASE (KWRI).

&&

NC

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 24, 8:47 PM ESTAreal Flood AdvisoryPHIChester, Delaware, Montgomery, Philadelphia6 hr
Dec 24, 9:08 PM ESTCoastal Flood AdvisoryPHIBucks, Philadelphia14 hr
Dec 24, 9:16 PM ESTAreal Flood AdvisoryPHIBucks, Lehigh, Northampton3 hr
Dec 24, 9:38 PM ESTAreal Flood WarningPHIChester, Delaware, Montgomery, Philadelphia14 hr
Dec 24, 10:09 PM ESTAreal Flood AdvisoryPHIBerks, Carbon, Lehigh, Monroe, Northampton6 hr
Dec 24, 10:21 PM ESTAreal Flood WarningPHIBucks14 hr
Dec 24, 10:30 PM ESTRiver Flood WarningPHIDelaware10 hr
Dec 24, 11:10 PM ESTAreal Flood AdvisoryPHIBucks4 hr
Dec 24, 11:26 PM ESTRiver Flood WarningPHIChester13 hr
Dec 24, 11:48 PM ESTAreal Flood WarningPHIBucks15 hr
Dec 24, 11:54 PM ESTAreal Flood WarningPHILehigh, Monroe, Northampton12 hr
Dec 25, 12:36 AM ESTRiver Flood WarningPHIMontgomery13 hr
Dec 25, 12:53 AM ESTAreal Flood WarningPHIChester6 hr
Dec 25, 12:59 AM ESTRiver Flood WarningPHIChester, Montgomery, Philadelphia21 hr
Dec 25, 2:28 AM ESTRiver Flood WarningPHIBucks15 hr
Dec 25, 3:29 AM ESTAreal Flood WarningPHIBerks6 hr
Dec 25, 3:33 AM ESTRiver Flood WarningPHIChester, Delaware17 hr
Dec 25, 4:00 AM ESTRiver Flood WarningPHILehigh, Northampton16 hr
Dec 25, 4:31 AM ESTAreal Flood WarningPHICarbon, Lehigh, Monroe, Northampton7 hr
Dec 25, 4:53 AM ESTRiver Flood WarningPHIBerks, Montgomery9 hr
Dec 25, 6:32 AM ESTRiver Flood WarningPHIMontgomery, Philadelphia7 hr
Dec 25, 7:28 AM ESTRiver Flood WarningPHIMonroe10 hr
Dec 25, 12:13 PM ESTAreal Flood WarningPHICarbon, Monroe9 hr
Dec 24, 8:39 PM ESTAreal Flood AdvisoryPHICumberland, Gloucester, Salem6 hr
Dec 25, 12:00 AM ESTAreal Flood WarningPHIMiddlesex, Somerset6 hr
Dec 25, 12:03 AM ESTCoastal Flood StatementPHIOcean12 hr
Dec 25, 1:37 AM ESTAreal Flood AdvisoryPHIMorris, Sussex, Warren10 hr
Dec 25, 2:05 AM ESTRiver Flood WarningPHIHunterdon, Somerset4 hr
Dec 25, 3:22 AM ESTGale WarningPHI6 hr
Dec 25, 3:22 AM ESTSmall Craft AdvisoryPHI51 hr
Dec 25, 5:43 AM ESTAreal Flood AdvisoryPHIMercer, Middlesex, Somerset3 hr
Dec 25, 7:25 AM ESTRiver Flood WarningPHIMorris, Passaic37 hr
Dec 25, 11:27 AM ESTAreal Flood WarningPHISussex, Warren16 hr
Dec 25, 12:17 PM ESTRiver Flood WarningPHIMiddlesex, Somerset9 hr
Dec 25, 12:53 PM ESTCoastal Flood StatementPHIBurlington, Ocean4 hr
Dec 25, 2:11 PM ESTRiver Flood WarningPHIMiddlesex, Somerset7 hr
Dec 25, 2:12 PM ESTRiver Flood WarningPHISomerset20 hr
Dec 25, 2:26 PM ESTRiver Flood WarningPHIHunterdon, Somerset3 hr
Dec 25, 6:25 PM ESTRiver Flood WarningPHIMorris21 hr

Nearby

Areal Flood Warnings in Pennsylvania, 2020Areal Flood Warnings in New Jersey, 2020Every areal flood warning in 2020

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.