Saturday, August17, 2019 L-36.com


Marine Weather and Tides
South Bethany, DE

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Sunrise 6:17AMSunset 7:55PM Saturday August 17, 2019 11:10 PM EDT (03:10 UTC) Moonrise 8:19PMMoonset 7:01AM Illumination 94% Phase: Waning Gibbous; Moon at 17 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ455 Expires:201908181315;;803885 Fzus51 Kphi 180129 Cwfphi Coastal Waters Forecast National Weather Service Mount Holly Nj 929 Pm Edt Sat Aug 17 2019 Sandy Hook Nj To Fenwick Island De To 20 Nm Offshore And Delaware Bay Anz454-455-181315- 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- 929 Pm Edt Sat Aug 17 2019
Overnight..S winds 5 to 10 kt. Seas 2 ft or less, then around 3 ft, then 2 ft or less late. SWell mainly from the S with a dominant period of 8 seconds. Areas of fog with vsby 1 to 3 nm.
Sun..S winds 5 to 10 kt. Seas around 3 ft early in the morning, then 2 ft or less, then around 3 ft in the afternoon. SWell mainly from the se with a dominant period of 8 seconds. Areas of fog in the morning with vsby 1 to 3 nm.
Sun night..S winds 5 to 10 kt, becoming sw late. Seas around 3 ft. SWell mainly from the se with a dominant period of 8 seconds. Patchy fog after midnight with vsby 1 to 3 nm.
Mon..S winds 5 to 10 kt. Seas around 3 ft. SWell mainly from the se with a dominant period of 8 seconds. Patchy fog early in the morning with vsby 1 to 3 nm.
Mon night..SW winds 5 to 10 kt. Seas around 3 ft.
Tue..S winds 5 to 10 kt. Seas 2 ft or less, then around 3 ft in the afternoon. A chance of showers and tstms in the afternoon.
Tue night..SW winds around 10 kt. Seas around 3 ft. A chance of tstms in the evening. A chance of showers.
Wed..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Wed night..SW winds around 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Thu..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. A chance of showers and tstms.
Thu night..W winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Seas 3 to 4 ft. A chance of showers and tstms. Winds and seas higher in and near tstms.
ANZ400 929 Pm Edt Sat Aug 17 2019
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. A bermuda high will build off the east coast through the remainder of the weekend and into the middle of next week. With the mid- atlantic on its northwest periphery, a warm, humid, and unsettled pattern will develop. A weak upper level disturbance will pass to our north on Sunday. A weak frontal boundary will approach late Monday and stall over the region by Tuesday. A stronger cold front will approach on Thursday and move offshore by Friday. High pressure will build in for the end of the week.


7 Day Forecast for Marine Location Near South Bethany, DE
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location: 38.53, -75     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 172228
afdphi
area forecast discussion
national weather service mount holly nj
628 pm edt Sat aug 17 2019

Synopsis
A bermuda high will build off the east coast through the remainder
of the weekend and into the middle of next week. With the mid-
atlantic on its northwest periphery, a warm, humid, and unsettled
pattern will develop. A weak upper level disturbance will pass to
our north on Sunday. A weak frontal boundary will approach late
Monday and stall over the region by Tuesday. A stronger cold front
will approach on Thursday and move offshore by Friday. High pressure
will build in for the end of the week.

Near term until 6 am Sunday morning
Radar and surface observations indicate that the sea breeze
front has advanced to the delaware river, and the combination
sea breeze and delaware bay breeze has encroached into
maryland's eastern shore. These breezes will dissipate as the
sun sets this evening. Shower thunderstorm activity across the
cwa is also waning, but a few widely scattered hit-or-miss
showers are still possible this evening, so have reduced chance
pops to slight chance in the south and have kept chance pops in
the north as remnants from the decaying MCS may still clip this
area overnight. Have also tweaked temperatures to match current
conditions. Otherwise... Previous forecast is on track.

Previous near term discussion below...

stationary front remains south of delmarva, and low pressure will
ride along this boundary and out to sea. Meanwhile, some mid-level
shortwave energy will pass through the region this evening.

With a prolonged period with high temperatures of at least 90
degrees expected into the middle of next week, along with a heat
index of at least 100 degrees on Monday and Tuesday, this meets the
criteria for an excessive heat warning for the urban corridor from
trenton to philly to wilmington. Will issue an excessive heat watch
through Wednesday, and depending on how things develop, future
shifts will either convert to a heat advisory or upgrade to an
excessive heat warning.

Onshore flow continues to usher a warm and humid airmass into the
region with surface dewpoints in the upper 60s to low 70s and highs
in the 80s to near 90. Surface based CAPE values are quite high,
ranging from 2500-3000 j kg north and west of the fall line to 3000-
3500 j kg south towards delmarva. With that weak shortwave energy
passing through this region this evening, showers and thunderstorms
have fired up across portions of eastern pennsylvania and are moving
into far western portions of the forecast area. Most of the high-res
guidance is indicating little in the way of thunderstorm
development, so will carry likely pops early for the western zones,
and otherwise chance slight chance. Pwats are over 1.5 inches, and
close to 1.75 inches in some areas. In addition, effective shear
ranges from 35-40 kt. Some locally heavy rain and gusty winds are
possible in the strongest of the storms.

With loss of diurnal heating, most activity tapers off fairly
quickly after sunset.

Quite warm and humid overnight with fog developing once again. Winds
take on a more southerly component, and dewpoints will rise towards
the mid 70s overnight.

The remnants of a decaying MCS are over the southern great lakes and
moving into the ohio valley. This should take a track north of the
local area, but there is the potential for showers and thunderstorms
from this system during the overnight hours, especially for northern
zones. Will carry chance pops for the northern zones for the late
night hours to cover this potential.

Short term 6 am Sunday morning through 6 pm Sunday
With a bermuda high in place, and winds shifting to more of a south-
southwest flow, the heat and humidity make a return to the region on
Sunday. Any lingering showers and thunderstorms will taper off and
move out of the region in the morning. Dewpoints climb into the mid
70s through the morning, and then there may be some mixing in the
afternoon to knock those dewpoints down a couple of degrees in the
afternoon. With highs in the upper 80s to lo 90s, the heat index
will at least approach 100 for portions of DELMARVA and the urban
corridor.

Another decaying mcs, along with some mid-level shortwave energy,
with pass north of the region in the afternoon. Another round of
showers and thunderstorms are possible, mainly for the northern
zones.

Long term Sunday night through Saturday
Overview...

an unsettled pattern looks to take hold for much of the long term
period as multiple disturbances pass through a hot and humid air
mass along the northwest periphery of the bermuda high and the
subtropical ridge. Not expecting any washouts over the next several
days, but it looks to be a favorable pattern for a steady dose of
opportunities for convection. Hot temperatures will also be a story
for the first half of the coming week as southwesterly flow will
draw warm and humid air into the region. The heat will peak on
Monday and Tuesday but it will remain warm and humid into at least
Wednesday. A strong cold front is likely to move through towards
Thursday, which should usher in a cooler and much drier air mass
towards the end of the week and potentially into next weekend.

Dailies...

Sunday night-Monday night... There may be some lingering showers or
storms early Sunday night, but they should tend to diminish with
time. Otherwise, it should be a warm and muggy overnight,
potentially with some fog and low cloud concerns as well. A
continued southwesterly flow around the periphery of the offshore
high pressure will lead to additional WAA on Monday, and
temperatures will jump a few degrees from Sunday. Widespread low 90s
are likely with some mid 90s possible in the urban corridor. With
humidity also remaining elevated, heat index values will likely
exceed 100, and either a heat advisory or excessive heat warning
will be needed for the urban corridor depending on how exactly the
numbers evolve in comparison with criteria. Agree with previous
forecaster that Monday looks like it might actually be fairly quiet
for precipitation, at least for most of the day and in most of the
area. Low pressure will be tracking far to our northwest over
ontario, but will drag a weak frontal boundary into our vicinity
late in the day. This could lead to a few late afternoon or evening
showers and storms especially in northern and western areas. This
activity could continue into the first half of what should be a warm
and muggy overnight, but again, expecting coverage to be fairly
limited.

Tuesday-Wednesday night... Chances for convection increase during
the midweek period. A shortwave, which may be convectively enhanced,
approaches on Tuesday. The frontal boundary from Monday, while weak
and losing definition, will also likely stall overhead. With the
shortwave approaching, this should help kick off scattered showers
and storms Tuesday afternoon and evening. Shear does not look very
impressive, but instability should be fairly strong so some strong
to severe storms are possible. Locally heavy rain may also be a
concern given the weak wind fields. Guidance also indicates
potential for convection to continue well into the night on Tuesday.

Wednesday, a cold front will be starting to approach but will remain
to our west. However, a pre-frontal trough will likely serve as a
trigger for another round of convection on Wednesday. Wind fields,
while not extreme, are stronger on Wednesday. Thus the severe
weather risk may be greater that day. However, it is possible cloud
cover may be more widespread Wednesday, which could limit
instability, so it is too early to be confident on severe weather.

Hot weather also continues into midweek with Tuesday looking similar
to Monday and with Wednesday perhaps slightly cooler due to the
additional cloud cover but still warm and humid. Similar to Monday,
Tuesday's conditions will necessitate the conversion of the
excessive heat watch to either a warning or a heat advisory. With
humid air remaining in place, the overnights will continue to be
warm and muggy as well with little relief from the daytime heat.

Thursday... A more robust trough will be swinging into the great
lakes by Wednesday night into Thursday. Ahead of it, a strong cold
front will push through our region. Timing of the front is a little
unclear, as the latest GFS is considerably faster than the latest ec
(not uncommon). Naturally the frontal passage will provide an
additional opportunity for convection. The extent of any severe
weather threat will likely depend mainly on frontal timing, with the
slower ec solution more likely to produce stronger storms since
daytime heating would be maximized. In any areas where the front
moves through early enough, a drying westerly flow will develop.

Ahead of it, such as over delmarva, it will remain warm and muggy.

Friday-Saturday... If the current expected timing of features holds
up, we should see cooler and drier air for the end of the week as an
upper level trough and surface high move overhead behind the front.

This should yield a couple of very nice days. Expecting the drier
air to probably be short lived as the upcoming pattern looks like it
may repeat itself heading into the following week.

Aviation 22z Saturday through Thursday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Tonight... Scattered shra tsra, mainly for krdg kabe and the i-95
corridor terminals, possible into this evening. Brief sub-vfr
conditions possible if a storm passes over a given terminal. Will
use vcts and tempo groups for those terminals. Low confidence for
shra tsra at kmiv kacy. Otherwise,VFR through this evening, then
MVFR ifr in fog late tonight. Another round of shra tsra possible
late in the overnight hours, mainly for krdg kabe. SE winds less
than 10 kt, becoming lgt vrb tonight.

Sunday... Morning fog dissipates toVFR conditions. South winds 5-10
kt. Scattered shra tsra possible in the afternoon and evening once
again.

Outlook...

Sunday night... Scattered showers and thunderstorms with associated
restrictions are possible for the first half of Sunday night. Patchy
fog may develop later Sunday night. Light southerly winds expected.

Monday-Monday night... Any lingering fog or low clouds should
dissipate early Monday, with conditions turningVFR towards mid-
morning and southwest winds around 5 kt.

Tuesday-Thursday... Prevailing conditions should beVFR, however,
several opportunities will exist for showers and thunderstorms and
associated restrictions. Low clouds and patchy fog also possible
during the overnight periods. Winds will be generally out of the
south or southwest, though may be light and variable on Tuesday and
could turn more westerly by Thursday.

Marine
Conditions remain below small craft advisory levels tonight and
Sunday. Areas of fog near the shore are possible again tonight
through Sunday morning.

Outlook...

Sunday night-Tuesday night... Sub-sca conditions expected. Southwest
winds around 10 kt. Seas 2 to 3 ft.

Wednesday-Thursday... Sub-sca conditions are expected to continue,
though winds and seas will increase a bit. Southwest winds gusting
near to above 20 kt with seas 3 to 4 ft.

Rip currents...

there is a moderate risk for the development of dangerous rip
currents at the new jersey and delaware beaches through this evening.

Phi watches warnings advisories
Pa... Excessive heat watch through Wednesday evening for paz070-071-
102-104-106.

Nj... Excessive heat watch through Wednesday evening for njz015-
017>019.

De... Excessive heat watch through Wednesday evening for dez001.

Md... None.

Marine... None.

Synopsis... O'brien
near term... Miketta mps
short term... Mps
long term... O'brien
aviation... Mps o'brien o'hara
marine... Miketta mps o'brien


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OCSM2 14 mi190 min 2 ft
OCIM2 - 8570283 - Ocean City Inlet, MD 15 mi76 min W 2.9 G 4.1 78°F 76°F1016.3 hPa
44009 - DELAWARE BAY 26 NM Southeast of Cape May, NJ 17 mi80 min SW 9.7 G 12 79°F 80°F3 ft1015.4 hPa (+0.9)
LWSD1 - 8557380 - Lewes, DE 19 mi70 min SW 5.1 G 7 80°F 75°F1015.5 hPa (+0.8)
CMAN4 - 8536110 - Cape May, NJ 30 mi70 min S 4.1 G 7 77°F 77°F1015.3 hPa (+0.9)
BRND1 - 8555889 - Brandywine Shoal Light, DE 32 mi70 min 1016 hPa (+0.9)
DRSD1 - Delaware Reserve, DE 45 mi160 min SSE 2.9 79°F 1015 hPa76°F

Wind History for Ocean City Inlet, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ocean City, Ocean City Municipal Airport, MD17 mi17 minN 010.00 miFair76°F73°F94%1015.8 hPa
Georgetown - Delaware Coastal Airport, DE22 mi16 minSSW 310.00 miFair76°F75°F97%1015.8 hPa

Link to 5 minute data for KOXB

Wind History from OXB (wind in knots)
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Last 24hrCalmS4CalmS3CalmCalmCalmCalmCalmCalmCalmSE4SE6SE7SE7SE7S4S7S5SW6SW8SW4SW3Calm
1 day agoE5NE3E3NE4NE3NE3CalmN3NE5NE7NE5E7E7E7E6E5E5E5E4E4E5SE6CalmCalm
2 days agoN6NE3CalmN5N8NE6NE7NE9NE6NE7NE8NE9NE9NE8NE8E10NE7NE6NE6NE4NE5NE4NE4NE4

Tide / Current Tables for Fenwick Island Light, Delaware
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Fenwick Island Light
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Sat -- 03:37 AM EDT     0.03 feet Low Tide
Sat -- 06:16 AM EDT     Sunrise
Sat -- 08:01 AM EDT     Moonset
Sat -- 09:40 AM EDT     3.79 feet High Tide
Sat -- 03:46 PM EDT     0.38 feet Low Tide
Sat -- 07:51 PM EDT     Sunset
Sat -- 09:19 PM EDT     Moonrise
Sat -- 09:51 PM EDT     4.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.51.60.70.20.10.61.52.53.23.73.83.42.61.81.10.50.40.81.72.73.544.23.8

Tide / Current Tables for Delaware Bay Entrance, Delaware Current
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Delaware Bay Entrance
Click for Map
Sat -- 03:09 AM EDT     -1.40 knots Max Ebb
Sat -- 06:14 AM EDT     0.00 knots Slack
Sat -- 06:15 AM EDT     Sunrise
Sat -- 08:01 AM EDT     Moonset
Sat -- 09:03 AM EDT     1.20 knots Max Flood
Sat -- 12:03 PM EDT     -0.00 knots Slack
Sat -- 03:19 PM EDT     -1.15 knots Max Ebb
Sat -- 05:59 PM EDT     0.00 knots Slack
Sat -- 07:52 PM EDT     Sunset
Sat -- 09:10 PM EDT     1.40 knots Max Flood
Sat -- 09:19 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-0.8-1.2-1.4-1.2-0.8-0.10.511.210.60-0.5-0.9-1.1-1.1-0.600.61.11.41.30.8

Weather Map and Satellite Images
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Wind Forecast for Philadelphia/Mount Holly, PA (23,6,7,8)
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.