Friday, October20, 2017 L-36.com


Marine Weather and Tides
Wilmington, DE

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:17AMSunset 6:16PM Friday October 20, 2017 12:21 PM EDT (16:21 UTC) Moonrise 6:54AMMoonset 6:09PM Illumination 0% Phase: New Moon; Moon at 0 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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ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 1218 Pm Edt Fri Oct 20 2017
This afternoon..NW winds 5 to 10 kt with gusts up to 15 kt. Waves 2 ft or less.
Tonight..NW winds 5 to 10 kt, becoming N late. Waves 2 ft or less.
Sat..SE winds around 5 kt. Waves 2 ft or less.
Sat night..SE winds around 5 kt. Waves 2 ft or less.
Sun..SE winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Waves 2 ft or less.
Sun night..S winds 5 to 10 kt with gusts up to 15 kt. Waves 2 ft or less.
Mon..S winds 5 to 10 kt. Waves 2 ft or less.
Mon night..S winds 10 to 15 kt. Waves 2 ft or less. A chance of showers.
Tue..S winds 15 to 20 kt. Waves around 3 ft. Rain likely.
Tue night..S winds 15 to 20 kt, becoming sw 5 to 10 kt after midnight. Waves around 3 ft in the evening, then 2 ft or less. Rain likely in the evening, then a chance of showers after midnight.
ANZ400 1218 Pm Edt Fri Oct 20 2017
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. A dry frontal boundary will move offshore of the northeast this morning. Then high pressure builds across the area today into Saturday. The high builds offshore Saturday night into Sunday, and remains offshore through Monday. A frontal boundary is forecast to move across the area Tuesday into Tuesday night, bringing a return of unsettled weather to the area.

7 Day Forecast for Marine Location Near Wilmington, DE
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location: 39.73, -75.56     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 201324
afdphi
area forecast discussion
national weather service mount holly nj
924 am edt Fri oct 20 2017

Synopsis
A dry frontal boundary will move offshore of the northeast this
morning. Then high pressure builds across the area today into
Saturday. The high builds offshore Saturday night into Sunday,
and remains offshore through Monday. A frontal boundary is
forecast to move across the area Tuesday into Tuesday night,
bringing a return of unsettled weather to the area.

Near term until 6 pm this evening
A cold front will pass through pa and nj by noon, then through
the DELMARVA later today.

Winds turn to the NW behind the passage of the front. There is
not much CAA behind the front, so highs today will be right
around what they were on Thursday. There will be a drier airmass
building south, though, as surface dewpoints will fall from the
mid upper 40s to the lower 40s late this morning.

With abundant sunshine and NW winds backing to the w, there
should be some mixing to around 900 mb, but there is not much
wind aloft, so winds should average 10 mph with gusts to 20 mph.

This will also result in some drier air to mix down, resulting
in surface dewpoints generally in the upper 30s across SE pa and
nj, but possibly as low as in the lower 30s across southern nj.

With the front slow to cross the delmarva, winds should range
from 5- 10 mph, and dewpoints will be in the lower 40s.

Short term 6 pm this evening through 6 am Saturday
The front continues to sag south tonight. Dewpoints rebound a
bit from the afternoon mixing, but will still be in the low 40s
across nj SE pa, and in the mid 40s in the delmarva. Dewpoints
will drop into the mid and upper 30s in the poconos. Lows
tonight will be in the low 50s in the philly metro area, and in
the low to mid 40s across the rest of SE pa and nj, and in the
mid to upper 40s in the delmarva.

Long term Saturday through Thursday
Quiet weather is expected for the weekend as high pressure will
be in control of the weather through Saturday, before moving
offshore Saturday night into Sunday and remaining offshore
through Monday.

Ridging aloft remains in place across the area this weekend
then builds offshore Sunday into Monday. This will keep
temperatures well above normal over the weekend into Monday.

A cold front is expected to move across the area Tuesday as an
area of low pressure moves through the great lakes region.

Showers could begin as early as Monday night as moisture and
lift begin to move into the area ahead of the approaching storm
system. The rain chances are highest during the day Tuesday as
the front moves across the area. There is also some weak
instability forecast during the day Tuesday, so there is a
slight chance of isolated thunderstorms as well. Winds may also
become quite gusty in the southwest flow ahead of the cold front
during the day Tuesday. Wind gusts of 30 mph or greater are
possible.

The front is forecast to slowly move to the east and northeast
into Wednesday and Thursday. Also, an area of low pressure is
forecast to develop to our east along this boundary and move
into northern new england. Meanwhile, a cold mid upper trough is
forecast to move across the area for Wednesday into Thursday.

This could help create some scattered showers across the area
Wednesday into Thursday, in addition to bringing cooler
conditions.

Aviation 14z Friday through Tuesday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Any patchy ground fog at the TAF sites this morning will burn
off by 13z. Otherwise,VFR with skc-few250 through the taf
period.

Lgt vrb winds through 14-15z, and then NW winds increase to 5-7
kt. By this afternoon, winds back to the w-nw at 10 kt with
gusts to 15- 18 kt. Winds diminish to 5 kt or less tonight.

Outlook...

Saturday-Monday...VFR conditions expected. Winds may gust
around 15 knots Friday, Sunday, and Monday.

Monday night-Tuesday... Conditions lower overnight Monday into
Tuesday as a cold front moves through and showers move across
the area. Winds could gust at least 25-30 knots on Tuesday.

Marine
Sw winds 10-15 kt will shift to the NW later this morning as a
cold front slowly works its way south across the waters. Gusts
to 20 kt possible in the immediate passage of the front, then
winds gradually decrease later this afternoon, and then n-nw
winds will range from 5- 10 kt tonight.

Seas will average 3-4 ft on the ocean, generally in a 9 second
period, and 2 ft or less on de bay.

Outlook...

Saturday-Monday... Conditions expected to remain below small
craft advisory levels through the period.

Monday night-Tuesday... Conditions likely to increase to small
craft advisory levels, possibly gale force, late Monday night
into Tuesday.

Fire weather
Nw winds later today will bring a drier airmass to the region,
and winds will range from 10-15 mph with gusts up to 20 mph,
especially across SE pa and most of nj. Rh values across most of
nj and pa will range from 25-30 percent. Additionally, fine
fuels are dry (below 10 percent) across the region. These
conditions could potentially support an enhanced risk for the
spread of wildfires by the late morning or afternoon. A special
weather statement will be issued for nj and pa for this risk.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... None.

Synopsis... Robertson
near term... Gaines mps
short term... Mps
long term... Robertson
aviation... Robertson mps
marine... Robertson mps
fire weather...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MRCP1 - 8540433 - Marcus Hook, PA 9 mi129 min 66°F 69°F1023.2 hPa
DELD1 - 8551762 - Delaware City, DE 10 mi123 min NNW 6 G 8.9 66°F 63°F1023.6 hPa
RDYD1 - 8551910 - Reedy Point, DE 12 mi123 min 65°F 67°F1023.2 hPa
CHCM2 - 8573927 - Chesapeake City, MD 19 mi129 min NW 6 G 11 65°F 66°F1024 hPa
PHBP1 - 8545240 - Philadelphia, PA 26 mi123 min 68°F 67°F1022.8 hPa
44057 - Susquehanna, MD 30 mi111 min NNW 9.7 G 9.7 64°F 1023.9 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 31 mi123 min NW 12 G 14 65°F 67°F1022.9 hPa
BDSP1 31 mi123 min 65°F 68°F1023.4 hPa
BDRN4 - 8539094 - Burlington, Delaware River, NJ 44 mi165 min W 2.9 G 4.1 64°F 65°F1022.8 hPa

Wind History for Delaware City, DE
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wilmington, New Castle County Airport, DE4 mi30 minN 710.00 miFair71°F43°F36%1023.5 hPa
Philadelphia, Philadelphia International Airport, PA20 mi27 minNW 710.00 miA Few Clouds70°F36°F29%1023 hPa
Chester County Airport, PA24 mi46 minNW 810.00 miFair66°F42°F43%1024 hPa

Wind History from ILG (wind in knots)
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Last 24hrSW11W11SW8SW9SW7SW6SW4SW5SW3W3CalmCalmCalmW3W4NW3NW3NW4W4NW6NW6NW7N7N7
1 day agoCalm5SW5SW8SW9SW6SW4SW4W3W3CalmCalmCalmCalmCalmCalmCalmCalmCalmNW3CalmCalmSW6W8
2 days ago43N53SW3W4SW5SW4SW4SW4SW4W3W4CalmCalmCalmW3CalmNW3CalmW4W5W5NW5

Tide / Current Tables for Millside, RR. bridge, Delaware
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Millside
Click for Map
Fri -- 01:12 AM EDT     5.86 feet High Tide
Fri -- 07:18 AM EDT     Sunrise
Fri -- 07:54 AM EDT     Moonrise
Fri -- 08:08 AM EDT     0.06 feet Low Tide
Fri -- 01:35 PM EDT     6.01 feet High Tide
Fri -- 06:15 PM EDT     Sunset
Fri -- 07:09 PM EDT     Moonset
Fri -- 08:34 PM EDT     0.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.25.85.64.73.52.51.50.60.10.51.93.54.95.85.95.24.1321.10.30.31.32.8

Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
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Chesapeake and Delaware Canal
Click for Map
Fri -- 01:46 AM EDT     -1.87 knots Max Ebb
Fri -- 05:15 AM EDT     0.02 knots Slack
Fri -- 07:18 AM EDT     Sunrise
Fri -- 07:55 AM EDT     Moonrise
Fri -- 07:59 AM EDT     2.14 knots Max Flood
Fri -- 10:52 AM EDT     -0.09 knots Slack
Fri -- 02:03 PM EDT     -2.18 knots Max Ebb
Fri -- 05:49 PM EDT     0.03 knots Slack
Fri -- 06:16 PM EDT     Sunset
Fri -- 07:10 PM EDT     Moonset
Fri -- 08:32 PM EDT     2.24 knots Max Flood
Fri -- 11:54 PM EDT     -0.04 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.3-1.8-1.9-1.7-1.3-0.71.21.92.11.91.3-0.5-1.5-2-2.2-2.1-1.8-1.30.61.72.22.21.91.3

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Philadelphia/Mount Holly, PA (12,3,4,5)
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Ground Weather Radar Station Philadelphia, PA
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weather_mapweather_map weather_map

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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.