Special Weather Statement, NWS Philadelphia/Mount Holly

Area Forecast Discussion
National Weather Service Mount Holly NJ
1038 AM EDT Sat Jul 15 2017

.SYNOPSIS...
Weak low pressure passes through the Delmarva and southern New
Jersey early this morning, and this will pull a cold front
through the region later this morning. That front will become
nearly stationary over the Mid-Atlantic as high pressure builds
in from the west. The high works its way east through the
weekend, and moves offshore Sunday night. Weak areas of low
pressure will develop along the stalled boundary and pass
through the region Monday and Tuesday. High pressure builds
across the region on Wednesday. Several cold fronts then
approach from the west Thursday and Friday.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
An upper-level trough will continue to shift across the
Northeast and northern Mid Atlantic this morning. This will push
a cold front off the coast this morning, however it then should
tend to stall. The model guidance indicates that the trough
axis should clear our area by about Midday although general
cyclonic flow remains. At the surface, high pressure builds
across the Ohio Valley through the day, with it getting closer
to our area toward evening.

Clouds are slow to decrease over the southern/eastern areas this
morning. Fog with low visibilities is occurring across some of
the beach areas near Cape May and (probably) Delaware. Scattered
showers have formed in ern MD and central DE. We have adjusted
pops across Delmarva to have slgt chc into the noon hour.

High temperatures are mostly an even blend of MOS and
continuity. A warmer day is expected across the northern areas
as the flow turns west-northwest and sunshine returns. The low-
level flow though looks light enough where the surface winds may
turn southerly along the coast this afternoon (especially New
Jersey). Drier air is moving in the the N/W areas and will sweep
into the Del Valley and areas S/E as the afternoon progresses.

High temps were not changed attm, but a few adjustments in the
hourly grids were made. Overall, high temperatures will end up
at or slightly above normal. The higher temps S/E will be
realized later in the day then N/W.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM SUNDAY/...
An upper-level trough remains in place across the Northeast and
northern Mid Atlantic, with even some amplification over the
Great Lakes as the next stronger short wave digs east-
southeastward. Meanwhile, surface high pressure gradually
extends more to the east into our area.

While some upstream high-level moisture might translate into
some cirrus into our region through the night, overall we are
anticipating a clear to partly cloudy sky. Given lower dew
points and light winds, temperatures are expected to be
noticeably cooler compared to the last few mornings. Low
temperatures are mainly a blend of MOS and continuity, although
did tweak these down a bit for some local areas.

&&

.LONG TERM /SUNDAY THROUGH FRIDAY/...
High pressure builds across the region on Sunday. Plenty of
sunshine on tap with warm and mild conditions. Highs top off in
the mid and upper 80s throughout the region with relatively
comfortable humidity levels as surface dewpoints will be in the
low to mid 60s.

The pattern then changes as high pressure moves offshore Sunday
night. Return flow sets up behind the departing high, and
humidity levels build back up as dewpoints climb into the mid
and upper 60s, and possibly into the lower 70s across NE MD and
DE. During this time, H5 trough with several shortwaves rotating
around the base of the trough will move east, with the trough
digging from the Ohio Valley and Northeast down into the
Southeast. This trough will become nearly stationary along the
East Coast Monday and Tuesday, and several weak areas of low
pressure will develop on the stationary front along the Mid-
Atlantic and pass through the region during the start of the new
week.

Best chances for precip will be over the Lehigh Valley and
Pocono Mountains Monday afternoon as surface low pressure
develops on the boundary over the Mid-Atlantic, and then lifts
to the north throughout the day and moves offshore Monday night.
The upper trough remains along the coast, and another shortwave
dives into the base of the trough on Tuesday. Another surface
low develops Tuesday afternoon and passes through the region
Tuesday night.

Surface high pressure builds in from the west on Wednesday, and
the upper trough will be slow to depart. As a result, this
keeps at least a slight chance/chance for showers/thunderstorms
in the forecast on Wednesday.

High pressure moves offshore Wednesday night/Thursday morning.
From there, several weak cold fronts approach from the west for
Thursday and Friday. Each front could touch off at least
isolated to scattered showers and thunderstorms.

The warmest temps during the week look to occur on Wednesday
and Thursday, when a southwest flow ushers a hot and humid
airmass into the region with highs in the upper 80s to low 90s
and surface dewpoints in the upper 60s to low 70s. Dewpoints may
back off a bit on Friday behind one of the weak cold fronts.

&&

.AVIATION /15Z SATURDAY THROUGH WEDNESDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY and surrounding areas.

Today...The low conditions are expected to improve to VFR by
Midday. A few showers around through about Midday, however given
low coverage anticipated these were not included in the TAFs.
Light and variable winds, become northwesterly mainly in the 5
to 10 knot range.

Tonight...VFR. Northwest winds 5-10 knots early, becoming light
and variable at most terminals.

OUTLOOK...

Sunday through Sunday night...VFR conditions expected. Light
and variable winds, becoming SW 5-10 KT. Light and variable
winds at night.

Monday through Wednesday...Mainly VFR conditions expected.
Afternoon showers and thunderstorms with MVFR or lower
conditions possible. South to southeast winds around 10 knots.

Thursday...VFR conditions expected. SW winds 5-10 KT.

&&

.MARINE...
The conditions are expected to remain below Small Craft
Advisory criteria today and tonight. A cold front is forecast to
shift off the coast this morning then stall offshore and to our
south. An easterly surface wind has been continuing across the
northern coastal waters, however all areas will see a wind shift
to the west and northwest this morning behind the front. The
flow looks light enough though where the winds should turn
southerly this afternoon and into this evening especially for
the New Jersey coastal waters.

OUTLOOK...

Sunday through Thursday...Sub-SCA conditions expected on the
waters. Scattered showers and thunderstorms possible, mainly
during the afternoon and early evening hours Monday through
Wednesday. Heavy rain, gusty winds, and lightning can accompany
those thunderstorms.

RIP CURRENTS...
A low risk for the formation of dangerous rip currents is
anticipated for today into this evening, despite a light enough
wind becoming west to northwest then potentially turning back to
southerly this afternoon.

&&

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

&&

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

Hazardous Weather Outlook
National Weather Service Mount Holly NJ
325 AM EDT Sat Jul 15 2017

DEZ001>003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015>023-027-
PAZ054-055-060>062-070-071-101>106-161000-
New Castle-Kent-Inland Sussex-Cecil-Kent MD-Queen Annes-Talbot-
Caroline-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex-
Western Monmouth-Mercer-Salem-Gloucester-Camden-
Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May-
Southeastern Burlington-Carbon-Monroe-Berks-Lehigh-Northampton-
Delaware-Philadelphia-Western Chester-Eastern Chester-
Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks-
325 AM EDT Sat Jul 15 2017

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

.DAY ONE...Today and Tonight.

No hazardous weather is expected at this time.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

DEZ004-NJZ014-024>026-161000-
Delaware Beaches-Eastern Monmouth-Atlantic Coastal Cape May-
Coastal Atlantic-Coastal Ocean-
325 AM EDT Sat Jul 15 2017

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

.DAY ONE...Today and Tonight.

No hazardous weather is expected at this time.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ430-431-450>455-161000-
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-
325 AM EDT Sat Jul 15 2017

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

.DAY ONE...Today and Tonight.

No hazardous weather is expected at this time.

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

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Special Weather Statement
National Weather Service Mount Holly NJ
1206 PM EDT SAT JUL 15 2017

DEZ002-MDZ012-015-019-020-151630-
Kent-Queen Anne's-Talbot-Kent-Caroline-
1206 PM EDT SAT JUL 15 2017

...A LINE OF SHOWERS WILL AFFECT WEST CENTRAL KENT...NORTHEASTERN
TALBOT...SOUTHERN QUEEN ANNE'S...NORTHERN CAROLINE AND SOUTHWESTERN
KENT COUNTIES...

At 1204 PM EDT, radar indicated showers were located along a line
extending from Carville to near Chester. Movement was east at 10
mph. These showers have a history of producing water spouts that
move on shore. If you see a waterspout moving towards you...take
cover until the shower passes.

Locations impacted include...
Centerville, Centreville, Romancoke, Greensboro, Oakland, Ridgely,
Goldsboro, Queen Anne, Grasonville, Starr, Skipton, Copperville,
Jumptown, Chester, Wye Mills, Sandtown, Cordova, Carville, Hope and
Felton.

LAT...LON 3898 7633 3897 7622 3900 7617 3902 7622
      3909 7601 3901 7558 3880 7620 3880 7622
      3885 7620 3896 7624 3891 7624 3894 7628
      3889 7629 3896 7631 3887 7633 3889 7637
TIME...MOT...LOC 1604Z 292DEG 10KT 3904 7602 3894 7631

SFJ