Areal Flood Warning 32, NWS Philadelphia/Mount Holly

122 
WGUS81 KPHI 100140
FLSPHI

Flood Statement
National Weather Service Mount Holly NJ
940 PM EDT SAT JUN 9 2018

DEC005-100149-
/O.EXP.KPHI.FA.W.0032.000000T0000Z-180610T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sussex DE-
940 PM EDT SAT JUN 9 2018

...THE FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS WILL EXPIRE AT
945 PM EDT FOR SOUTHEASTERN SUSSEX COUNTY...

The heavy rain has ended and flood waters have receded, no longer
posing a threat to life or property. Please continue to heed any road
closures.

LAT...LON 3846 7545 3865 7544 3866 7519 3857 7504
      3846 7504 3845 7505

$$

JRK

Area Forecast Discussion
National Weather Service Mount Holly NJ
425 PM EDT Sat Jun 9 2018

.SYNOPSIS...
A stalled boundary will remain across part of the area through the
weekend. Several waves of low pressure will track along the boundary
through Monday. High pressure over eastern Canada will build
southward into the Mid Atlantic states on Monday, moving offshore
Monday night into Tuesday. A cold front will cross the region on
Wednesday. High pressure will return for Thursday. Another low
pressure system will affect the region towards the end of the
work week.

&&

.NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
Our region remains on the southwestern periphery of an upper-level
trough which is centered near the Canadian Maritimes. There are
several short waves traversing the flow. The forcing however over
our area is weak this afternoon, with the convection mostly driven
by heating, boundary interaction, cold pool development and weak
convergence. A secondary front is forecast to drop south-
southeastward into our area through tonight.

The ongoing convection across our southern zones is expected to
weaken and mostly dissipate through early this evening as cold pools
allow for the cores to rain themselves out. In addition, forcing is
weak and thus the convection should be primarily diurnally driven.
The convection is embedded in weaker flow and therefore training and
backbuilding has been common. The convection is tending to be more
pulse driven given low shear, thus locally strong to damaging
wind gusts and some hail may occur into early this evening with
the stronger cores. The precipitable water values are near 1.8
inches and the convection is very efficient rainfall producers.
This combined with slow storm motions, cell mergers and
backbuilding has resulted in some flash flooding. The GOES-East
visible satellite imagery this afternoon shows an MCV moving
across northern Indiana. A weaker perturbation looks to be in
eastern Ohio and western Pennsylvania, and this feature may
allow for some showers/thunder overnight especially for the
western and southern areas. There is low confidence in the
shower/thunder threat after early this evening given timing and
forcing uncertainty pertaining to the short waves and any weak
embedded MCV.

The airmass will remain humid south of a surface front through
tonight, and this may result in some low clouds developing
especially across southern New Jersey and Delmarva where convection
occurred this afternoon. In addition, local fog should develop
especially in these same areas. Low temperatures are mostly a multi-
model/continuity blend. The hourly temperature, dew point and wind
grids are a blend of continuity and guidance, including some high-
res models to hopefully help with local/convective effects.

&&

.SHORT TERM /6 AM SUNDAY MORNING THROUGH 6 PM SUNDAY/...
Our sensible weather may end up being complex during Sunday. As we
look aloft, a trough is forecast to amplify some across the
Northeast and northern Mid-Atlantic region through the day. This
will allow continued short wave energy to traverse the region. A
frontal zone should be stalled somewhere across our southern zones
and this may yet again result in some showers and thunderstorms. The
instability should be less given a northeasterly low-level flow that
is forecast.

The complicating factor involves MCV's that were generated from
convection well to our west. The model guidance looks to be focusing
on one main short wave that arrives around midday. Looking at the
guidance and tracing back this short wave, it looks to be tied to
the current MCV in northern Indiana. It is during this time frame
where a more organized area of showers and thunder arrives from the
west, with the better chance of convection farther south closer to
better instability. The northern extent of this may be overdone
given more stable air and also drier air. The timing is a little
less certain and therefore our PoP forecast is as well. The
precipitable water values are forecast to be 1.50-1.75 inches (lower
across the far northern areas), therefore locally heavy rain could
result in localized flooding although convection should not be as
robust as what occurred today (Saturday). Overall, lots of clouds
are expected to be around and with more of a northeast wind north of
the surface front it will be cooler across the region. High
temperatures are a blend of continuity and guidance which resulted
in cooler numbers.

&&

.LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/...
Unsettled weather continues into the start of the new week, and
the primary focus will be over the Delmarva.

A stationary boundary remains along the Mid-Atlantic into the
new week. For Sunday night, PWATs will increase to 1.75-2.0"
across eastern Maryland, Delaware, and southern New Jersey due
to persistent onshore flow. ML MUCAPEs will range from 500-1000
J/kg across the Delmarva, so a few embedded thunderstorms are
possible. Heavy rain is becoming likely, and this could lead to
flash flooding across the Delmarva and southern New Jersey.

Rain tapers off Monday morning as the low moves offshore.

During the day Monday, high pressure over eastern Canada builds
south into the Northeast, and then moves into the Gulf of Maine
late in the day and Monday evening. Conditions gradually dry out
from north to south, but some additional showers are possible
across the Delmarva.

High pressure moves out to sea on Tuesday, and then another
area of low pressure slides along the stationary boundary,
possibly bringing more showers with it.

A cold front approaches Tuesday night and moves through the
region Wednesday, continuing the chance for showers and
thunderstorms across the area. Conditions may dry out for
Thursday as weak high pressure builds in from the south, but
another area of low pressure may affect the region late in the
week.

&&

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

Rest of this afternoon...VFR, except IFR at times at ACY and MIV due
to showers and thunderstorms. The showers and thunderstorms are
anticipated to remain south of PHL. A rain cooled boundary shifting
inland may enhance a southeast wind for a time at PHL, PNE to TTN
late this afternoon. Northeast to southeast winds 5-8 knots.

Tonight...MVFR/IFR conditions possible early at MIV and ACY due to
showers and thunderstorms in the vicinity, otherwise VFR through at
least this evening. MVFR ceilings and/or visibilities may develop
overnight especially from near PHL on southward. Winds becoming east
and northeast at 5 knots or less. Low confidence with the timing and
extent of the MVFR or lower conditions overnight.

Sunday...Areas of MVFR/IFR conditions may linger at ILG, MIV and ACY
for much of the day, otherwise mostly VFR. Some showers and possible
thunderstorms may occur from about RDG to PHL to ACY southward
especially by late afternoon. Northeast winds near 10 knots.

OUTLOOK...
Sunday night...Showers and thunderstorm possible at KILG/KMIV/KACY,
with just showers possible elsewhere dropping conditions down
to MVFR/IFR overnight.

Monday...MVFR/IFR possible early but then improvement to VFR
expected. Lower conditions may linger at KILG, KMIV, and KACY
through late Monday morning. Easterly winds around 8 to 12
knots.

Tuesday...Mainly VFR conditions expected. East to southeast
winds around 5 to 10 knots.

Wednesday...Mainly VFR conditions expected. Showers and
thunderstorms possible. West winds around 5 to 10 knots.

Thursday...Mainly VFR conditions expected. Showers and
thunderstorms possible, mainly during the afternoon and
evening. Westerly winds around 5 to 10 knots.

&&

.MARINE...
The conditions should remain below Small Craft Advisory criteria
through Sunday. A frontal boundary stalled in the area should settle
south a bit then another front arrives later tonight into Sunday.
This will result in any southerly winds becoming northeast,
especially during Sunday when some increase is expected from north
to south. Some showers and thunderstorms into this evening mainly
from Atlantic City southward will produce locally gusty winds.

OUTLOOK...
Sunday night...Sub-Small Craft Advisory conditions are
expected through Sunday night. Seas will start to rise,
especially across the southern ocean waters late Sunday
night.

Monday through Tuesday morning...Small Craft Advisory conditions
expected. Seas will rise through early Monday and exceed 5 feet,
mainly from southern Ocean County down to the Delaware coast.
The pressure gradient tightens up and winds will start to gust
between 25 to 30 knots through Monday evening before starting to
subside. Winds are may exceed 25 knots on the lower Delaware Bay on
Monday. Seas will subside and fall below 5 feet early Tuesday
morning.

Tuesday morning through Thursday...Sub-Small Craft Advisory
conditions are expected.

RIP CURRENTS...
A low risk of rip currents continues into this evening as seas are
2-3 feet with a period of 4 to 8 seconds.

For Sunday, the rip current risk may increase to moderate as
northeasterly flow, seas and wave period increase some.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...None.
NJ...None.
DE...None.
MD...None.
MARINE...None.

&&

Synopsis...Meola
Near Term...Gorse
Short Term...Gorse
Long Term...Meola/MPS
Aviation...Gorse/Meola
Marine...Gorse/Meola

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
404 PM EDT Sat Jun 9 2018

NJZ001-007>010-012>015-017>020-026-027-PAZ054-055-060>062-070-071-
101>106-102015-
Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-Western Monmouth-
Eastern Monmouth-Mercer-Gloucester-Camden-Northwestern Burlington-
Ocean-Coastal Ocean-Southeastern Burlington-Carbon-Monroe-Berks-
Lehigh-Northampton-Delaware-Philadelphia-Western Chester-
Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-
Lower Bucks-
404 PM EDT Sat Jun 9 2018

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

.DAY ONE...This Afternoon 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.

DEZ001>004-MDZ008-012-015-019-020-NJZ016-021>025-102015-
New Castle-Kent-Inland Sussex-Delaware Beaches-Cecil-Kent MD-
Queen Annes-Talbot-Caroline-Salem-Cumberland-Atlantic-Cape May-
Atlantic Coastal Cape May-Coastal Atlantic-
404 PM EDT Sat Jun 9 2018

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

.DAY ONE...This Afternoon and Tonight.

Showers and thunderstorms will continue through this evening
producing very heavy rainfall, leading to flash flooding in some
areas. Additionally, there is the potential for isolated severe
storms to produce locally damaging winds and large hail.

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

Showers and scattered thunderstorms are expected late Sunday and
Sunday night. Rain will be heavy at times, and could lead to
additional urban, small stream, and poor drainage flooding.
Localized flash flooding is also possible.

.SPOTTER INFORMATION STATEMENT...

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

ANZ430-431-450>455-102015-
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-
404 PM EDT Sat Jun 9 2018

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

.DAY ONE...This Afternoon 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.

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
423 PM EDT SAT JUN 09 2018

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

0245 PM     FLASH FLOOD      SEAFORD                 38.65N  75.62W
06/09/2018                   SUSSEX             DE   911 CALL CENTER

            911 CENTER REPORTS SEVERALS CARS FLOODED IN WATER AND
            IMPASSABLE ROADS DUE TO FLOODING IN AND AROUND TOWN
            WITHIN THE LAST 1-2 HOURS

0245 PM     FLASH FLOOD      BETHANY BEACH           38.54N  75.07W
06/09/2018                   SUSSEX             DE   911 CALL CENTER

            911 CENTER REPORTS NUMEROUS STREETS FLOODED AND
            VEHICLES IN WATER WITHIN THE LAST 2 HOURS

0249 PM     FLASH FLOOD      MILLVILLE               39.39N  75.06W
06/09/2018                   CUMBERLAND         NJ   TRAINED SPOTTER

            SEVERE ROAD FLOODING REPORTED

0253 PM     FLASH FLOOD      FENWICK ISLAND          38.46N  75.05W
06/09/2018                   SUSSEX             DE   DEPT OF HIGHWAYS

            DELDOT REPORTS ALL LANES OF ROUTE 1 CLOSED AT ROUTE 54
            DUE TO FLOODING

0300 PM     FLASH FLOOD      BRIDGETON               39.43N  75.23W
06/09/2018                   CUMBERLAND         NJ   911 CALL CENTER

            911 CENTER REPORTS SEVERAL FLOODED STREETS IN DOWNTOWN
            ALONG WITH VEHICLES IN WATER WITHIN THE LAST HOUR

0300 PM     FLASH FLOOD      1 WSW MILLVILLE         39.38N  75.08W
06/09/2018                   CUMBERLAND         NJ   911 CALL CENTER

            911 CENTER REPORTS SEVERAL FLOODED ROADS IN MILLVILLE
            AS WELL AS VEHICLES IN WATER WITHIN THE LAST HOUR

&&

EVENT NUMBER PHI1800943 PHI1800944 PHI1800938 PHI1800939 PHI1800941
PHI1800942

Staarmann

Special Weather Statement
National Weather Service Mount Holly NJ
424 PM EDT SAT JUN 9 2018

DEZ002-MDZ012-015-020-092115-
Kent-Queen Anne's-Kent-Caroline-
424 PM EDT SAT JUN 9 2018

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

At 424 PM EDT, radar indicated strong thunderstorms were located
along a line extending from Dover Speedway to Kennedyville. Movement
was southeast at 20 mph.

Winds up to 40 mph and pea size hail are possible with these storms.

Locations impacted include...
Dover, Smyrna, Milford, Chestertown, Harrington, Camden, Clayton,
Greensboro, Cheswold, Church Hill, Millington, Sudlersville, Bowers,
Goldsboro, Woodside, Viola, Hartly, Old Town, Hazlettville and
Morgnec.

Torrential rainfall is occurring with this storm. A Flash Flood
Warning is already in effect for this area. Do not drive your
vehicle through flooded roadways.

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

LAT...LON 3929 7617 3932 7618 3934 7616 3933 7614
      3935 7613 3929 7576 3931 7543 3921 7540
      3907 7541 3901 7533 3896 7531 3896 7539
      3893 7540 3887 7557 3902 7595 3910 7609
      3928 7620
TIME...MOT...LOC 2024Z 321DEG 17KT 3917 7555 3930 7598

JRK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
437 PM EDT SAT JUN 09 2018

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

0325 PM     TSTM WND DMG     WOODED ACRES            38.62N  75.55W
06/09/2018                   SUSSEX             DE   TRAINED SPOTTER

            SPOTTER REPORTS LARGE TREE LIMBS DOWN

&&

EVENT NUMBER PHI1800945

STAARMANN

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
522 PM EDT SAT JUN 09 2018

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

0404 PM     HEAVY RAIN       1 SSE CARMEL            39.42N  75.11W
06/09/2018  M3.98 INCH       CUMBERLAND         NJ   MESONET

            3-HR RAINFALL. JUST UNDER 3.5 INCHES FELL IN 90 MINUTES
            ENDING AT 4 PM.

&&

EVENT NUMBER PHI1800946

JRK

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
524 PM EDT SAT JUN 09 2018

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

0410 PM     HEAVY RAIN       GOULDTOWN               39.43N  75.19W
06/09/2018  M4.48 INCH       CUMBERLAND         NJ   COCORAHS

            4.48 INCHES OF RAIN RECORDED IN FAIRFIELD TOWNSHIP.

&&

EVENT NUMBER PHI1800947

MEOLA

Special Weather Statement
National Weather Service Mount Holly NJ
531 PM EDT SAT JUN 9 2018

DEZ002>004-MDZ019-020-092215-
Inland Sussex-Kent-Delaware Beaches-Talbot-Caroline-
531 PM EDT SAT JUN 9 2018

...A LINE OF THUNDERSTORMS WITH TORRENTIAL DOWNPOURS WILL AFFECT
CENTRAL SUSSEX... SOUTHERN KENT...NORTHEASTERN TALBOT AND CAROLINE
COUNTIES...

At 530 PM EDT, radar indicated thunderstorms were located along a
line extending from near Big Stone Beach to near Milford to Ridgely.
Movement was southeast at 15 mph.

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

Locations impacted include...
Georgetown, Milford, Denton, Harrington, Lewes, Federalsburg, Milton,
Bridgeville, Greensboro, Oakland, Ridgely, Preston, Ellendale, Queen
Anne, Henlopen Acres, Smithville, Cape Henlopen State Park, Jumptown,
Agner and Andrewsville.

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

LAT...LON 3871 7584 3868 7593 3894 7608 3892 7595
      3900 7592 3900 7533 3891 7531 3880 7518
      3879 7510 3880 7509 3869 7508 3869 7513
      3867 7513 3867 7574
TIME...MOT...LOC 2130Z 313DEG 12KT 3894 7532 3889 7549 3894 7591

JRK