Friday, April20, 2018 L-36.com


Marine Weather and Tides
Bethany Beach, DE

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:16AMSunset 7:45PM Friday April 20, 2018 2:37 PM EDT (18:37 UTC) Moonrise 8:58AMMoonset 11:48PM Illumination 29% Phase: Waxing Crescent; Moon at 5 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 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- 156 Pm Edt Fri Apr 20 2018
This afternoon..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. SWell mainly from the nw with a dominant period of 5 seconds.
Tonight..N winds 10 to 15 kt with gusts up to 20 kt. Seas around 3 ft. SWell mainly from the nw with a dominant period of 5 seconds.
Sat..N winds 10 to 15 kt with gusts up to 20 kt, becoming nw 5 to 10 kt early in the afternoon, then becoming sw late. Seas around 3 ft early in the morning, then 2 ft or less. SWell mainly from the ne with a dominant period of 5 seconds.
Sat night..SW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt in the late evening and early morning, then becoming nw late. Seas 2 ft or less. SWell mainly from the se with a dominant period of 8 seconds.
Sun..NE winds 5 to 10 kt, becoming se in the afternoon. Seas 2 ft or less.
Sun night..S winds around 5 kt. Seas 2 ft or less.
Mon..NE winds around 5 kt, becoming E in the afternoon. Seas 2 ft or less.
Mon night..SE winds 5 to 10 kt. Seas 2 ft or less.
Tue..E winds 10 to 15 kt. Seas 3 to 4 ft.
Tue night..E winds 15 to 20 kt. Seas 3 to 5 ft, building to 4 to 7 ft after midnight. Rain likely.
ANZ400 156 Pm Edt Fri Apr 20 2018
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure will build in from the west this afternoon and remain in the area through the weekend before sliding offshore on Monday. Low pressure developing over the southeastern united states will move up the mid atlantic coast, affecting our area through the mid week period.

7 Day Forecast for Marine Location Near Bethany Beach, DE
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location: 38.53, -75.05     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 201810
afdphi
area forecast discussion
national weather service mount holly nj
210 pm edt Fri apr 20 2018

Synopsis
High pressure will build in from the west today and remain in the
area through the weekend before sliding offshore on Monday. Low
pressure developing over the southeastern united states will move up
the mid atlantic coast, affecting our area through the mid week
period.

Near term until 6 pm this evening
Low pressure was located near the canadian maritimes this morning
while high pressure was centered over the midwest states. A
relatively tight gradient in between both systems has resulted in a
breezy start to the day with northwest winds 15-20 mph gusting 25-30
mph. Winds will relax ever-so-slightly this afternoon owing the
presence of a weak surface trough over the area.

Cold-air advection stratocu originating from lake ontario continues
to break apart downstream past the poconos owing to downsloping flow
and mid-level subsidence in wake of the exiting mid-level trough.

However, a CU field should be present through the afternoon with
strong boundary-layer mixing underneath the subsidence inversion.

High temperatures today in the 40s in the southern poconos and far
northwestern nj and low to mid 50s elsewhere are close to what climo
would be for march 20th but generally 10-15 degrees below normal for
april 20th.

Short term 6 pm this evening through 6 am Saturday
The center of the surface high is forecast to slide into the eastern
great lakes region and the upper ohio river valley tonight. We are
anticipating a mostly clear sky with perhaps an increase in cirrus
late tonight. The northwest wind is expected to diminish to less
than 10 mph.

We continue to issue frost and freeze products only for locations
from the counties of berks, montgomery, lower bucks, mercer and
middlesex southward. We will begin frost and freeze products for
much of the remainder of our forecast area next week. Based on the
anticipated low temperatures for tonight (mostly in the 30s) and the
decreasing wind, we may need to put some areas under a frost
advisory. Another freeze warning is possible for the same locations
as the current one. We will look at the next full suite of guidance
before making a final decision during the day.

Long term Saturday through Thursday
Saturday through Monday...

surface high pressure will build over the region through this period
along with an associated upper level ridge. This will bring fair
weather with sunshine and gradually warming temperatures.

Forecast models are in excellent agreement with this scenario
so a high confidence forecast for this period.

In terms of the day to day specifics, each day will feature plenty
of sunshine but there will still be a bit a NW breeze Saturday near
10 mph with highs generally in the upper 50s to low 60s (except
cooler in the southern poconos). This is still a little cool for
this time of year. However winds will be lighter for Sunday and
Monday with temperatures warming a couple degrees each day so by
Monday, highs will be well into the 60s for much of the region. Lows
each day will be chilly due to the clear skies and light
winds... Generally in the 30s with western and northern zones in the
cwa likely dipping to near or below freezing.

Tuesday through Thursday...

overall, no major changes to this part of the forecast as general
thinking remains the same. A low pressure system will move across
the mississippi valley and into the southeastern united states early
next week. As the low pushes towards the coast, it starts to move
northward towards the mid-atlantic states. While the forecast models
agree that there is some form of a coastal low that develops and
impacts our area, there are still differences regarding timing and
evolution that lead to a relatively low confidence forecast at this
time. The system will bear watching as it will have good moisture
associated with it and the potential for some heavy rain will exist.

Strong onshore flow could also bring some coastal flooding concerns
and will also need to be monitored. Still a long way out and plenty
of time to see how the models come together on this system over the
coming week.

Aviation 18z Friday through Wednesday
The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg,
kmiv, kacy and surrounding areas.

Remainder of this afternoon...VFR. Few to sct CU with bases 4-6
kft agl. NW winds 10-15 kt with gusts 20-25 kt, weakening.

Tonight...VFR. High clouds move in toward early morning with
cigs at or above 15 kft agl. NW wind gusts should diminish
toward or just after sunset this evening. Sustained winds will
decrease more gradually from 8-12 kt early this evening to 3-6
kt overnight.

Saturday...VFR with mid to high clouds (cigs above 10 kft agl).

Light NW winds 5-10 kt.

Outlook...

Saturday night and Sunday...VFR conditions with light winds.

High confidence.

Monday...VFR conditions expected along with continuing light winds.

Moderate confidence.

Tuesday... MainlyVFR conditions expected. East to southeast winds
around 10 to 15 knots. Increasing cloudiness through the day.

Moderate confidence.

Marine
This afternoon... SCA was allowed to expire at 2 pm with nw
winds generally in the 10-20 kt range. The north wildwood wxflow
station remains an anomaly with gusts still 25-30 kt but that
doesn't warrant an extension of a sca.

Tonight... Nw winds will continue to be in the 10-20 kt range
tonight. Short-period, wind-driven nwly swells will be in the
3-4 ft range in our coastal waters and 2 ft or less in the
delaware bay.

Saturday... Nw winds 10-15 kt in the morning will become
light variable toward midday and then S by mid afternoon in
association with the development of a sea-breeze near the
coast. Mesoscale models show the S winds strengthening to near
15 kt with gusts to 20 kt late in the day in the coastal waters
of nj.

Outlook...

Saturday night through Monday... .Sub-advisory conditions are
expected on the the area waters.

Tuesday... Winds and seas increase in advance of an approaching
coastal low with SCA conditions likely be late day.

Fire weather
After coordination with pa and nj fire wx partners this
morning, no fire weather headlines or special weather statements
will be needed. Despite the gusty NW winds 10-15 mph with gusts
20-25 mph and rh values dropping into the lower 30s, fuel
moisture values are still above 10 percent due to the recent
rainfall.

Saturday will be drier in terms of fuel moisture and perhaps rh
(min rh near 30 percent) than today but winds will be lighter
(5-15 mph), which should hinder the fast spread of wildfires.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... Small craft advisory until 2 pm edt this afternoon for anz430-
431-450>455.

Synopsis... Fitzsimmons
near term... Klein
short term... Iovino
long term... Fitzsimmons
aviation... Fitzsimmons iovino klein
marine... Fitzsimmons iovino klein
fire weather...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OCIM2 - 8570283 - Ocean City Inlet, MD 14 mi49 min NNW 15 G 21 49°F 48°F1024.9 hPa
LWSD1 - 8557380 - Lewes, DE 18 mi49 min NNW 15 G 17 47°F 49°F1024.4 hPa
44009 - DELAWARE BAY 26 NM Southeast of Cape May, NJ 19 mi47 min NNW 18 G 19 43°F 46°F3 ft1024.6 hPa (+0.5)31°F
CMAN4 - 8536110 - Cape May, NJ 31 mi49 min NNW 7 G 15 48°F 49°F1024.1 hPa
BRND1 - 8555889 - Brandywine Shoal Light, DE 32 mi55 min N 16 G 19 45°F 1024.8 hPa
DRSD1 - Delaware Reserve, DE 44 mi127 min WNW 8 48°F 1025 hPa27°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, MD16 mi44 minNNW 13 G 2010.00 miFair53°F30°F41%1024.5 hPa
Georgetown - Delaware Coastal Airport, DE20 mi43 minNNW 9 G 1810.00 miFair53°F27°F37%1024.7 hPa

Wind History from OXB (wind in knots)
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1 day agoS11
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S8S7S6S3S5S4SE5366S4W6NW6NW9N11NE8
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2 days agoW13
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W6NW3W4W5SW5W5NW7NW9NW7NW6N7CalmW3W4NW7N7NW6S8SW7SW10
G16

Tide / Current Tables for Inlet (bridge), Indian River, Delaware
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Inlet (bridge)
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Fri -- 05:49 AM EDT     -0.08 feet Low Tide
Fri -- 06:17 AM EDT     Sunrise
Fri -- 09:57 AM EDT     Moonrise
Fri -- 12:43 PM EDT     2.71 feet High Tide
Fri -- 05:49 PM EDT     0.11 feet Low Tide
Fri -- 07:41 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.232.31.40.60.1-0.10.10.71.31.92.42.62.72.31.60.80.30.10.30.81.52.22.7

Tide / Current Tables for Delaware Bay Entrance, Delaware Current
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Delaware Bay Entrance
Click for Map
Fri -- 01:44 AM EDT     -0.00 knots Slack
Fri -- 05:28 AM EDT     -1.64 knots Max Ebb
Fri -- 06:16 AM EDT     Sunrise
Fri -- 08:24 AM EDT     0.00 knots Slack
Fri -- 09:57 AM EDT     Moonrise
Fri -- 11:11 AM EDT     1.49 knots Max Flood
Fri -- 02:14 PM EDT     -0.00 knots Slack
Fri -- 05:38 PM EDT     -1.35 knots Max Ebb
Fri -- 07:41 PM EDT     Sunset
Fri -- 08:16 PM EDT     0.00 knots Slack
Fri -- 11:23 PM EDT     1.74 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.6-0.2-0.9-1.4-1.6-1.6-1.1-0.30.51.11.51.30.80.2-0.5-1-1.3-1.3-1-0.20.61.31.7

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Philadelphia/Mount Holly, PA (14,3,4,5)
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Ground Weather Radar Station Dover AFB, DE
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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.