Saturday, April29, 2017 L-36.com


Marine Weather and Tides
Lewes, DE

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:03AMSunset 7:55PM Saturday April 29, 2017 7:27 AM EDT (11:27 UTC) Moonrise 7:55AMMoonset 10:35PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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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ANZ454 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- 705 Am Edt Sat Apr 29 2017
Today..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft. Mainly in se swell with a dominant period of 7 seconds. A slight chance of showers and tstms early this morning. A slight chance of showers and tstms late.
Tonight..SW winds 10 to 15 kt with gusts up to 20 kt... Diminishing to 5 to 10 kt after midnight...then becoming ne late. Seas 3 to 4 ft. Mainly in se swell with a dominant period of 8 seconds. A chance of showers and tstms in the evening...then a slight chance of showers and tstms after midnight. A chance of showers and tstms late.
Sun..SE winds 5 to 10 kt. Seas 3 to 4 ft. Mainly in se swell with a dominant period of 8 seconds. A chance of showers and tstms early in the morning.
Sun night..S winds 10 to 15 kt. Gusts up to 25 kt. Seas 3 to 4 ft.
Mon..S winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Mon night..S winds 20 to 25 kt with gusts up to 30 kt. Seas 5 to 8 ft. Showers likely with a chance of tstms.
Tue..SW winds 15 to 20 kt. Seas 4 to 7 ft. Showers likely with a chance of tstms in the morning.
Tue night..W winds 10 to 15 kt. Seas 3 to 5 ft.
Wed..W winds 10 to 15 kt. Seas 2 to 4 ft.
Wed night..SW winds 5 to 10 kt...becoming S after midnight. Seas 2 to 3 ft. Winds and seas higher in and near tstms.
ANZ400 705 Am Edt Sat Apr 29 2017
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. A cold front is expected to slide south into our region tonight before stalling over delmarva and south jersey. The front is expected to return north as a warm front late tomorrow. Another cold front is expected on Monday night as an area of low pressure moves into the great lakes region. This low will drift northeast through eastern canada through mid week. Another low pressure system will lift out of the lower mississippi valley towards the mid atlantic by late in the week.

7 Day Forecast for Marine Location Near Lewes, DE
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location: 38.78, -75.12     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 291037
afdphi
area forecast discussion
national weather service mount holly nj
637 am edt Sat apr 29 2017

Synopsis
A cold front is expected to slide south into our region tonight
before stalling over DELMARVA and south jersey. The front is
expected to return north as a warm front late tomorrow. Another cold
front is expected on Monday night as an area of low pressure moves
into the great lakes region. This low will drift northeast through
eastern canada through mid week. Another low pressure system will
lift out of the lower mississippi valley towards the mid atlantic by
late in the week.

Near term /until 6 pm this evening/
This first round of showers and thunderstorms has moved to the
east and offshore as the first short wave has passed to our
east. We should have a break in shower/thunderstorm activity,
before another round of showers and thunderstorms moves into
the area later this morning into the the noon hour as a second
short wave/vorticity impulse moves across the area. This area
should weaken move to our east as the second short wave passes
to the east.

Then yet another round of showers and thunderstorms is possible by
late this afternoon into this evening as a backdoor cold front moves
into the area and another short wave slides across the area as well.

This batch of showers and thunderstorms will have more surface based
instability to tap into and less of a cap. So it could be possible
that an isolated severe thunderstorm could develop late today.

Temperatures today will warm quite significantly and come withing a
couple of degrees for some areas. Ged is the one site that is
actually forecast to reach a record.

Short term /6 pm this evening through 6 am Sunday/
The backdoor cold front will continue to push through the area this
evening and overnight. The round of showers and thunderstorms
mentioned for the late afternoon and evening will slide east and
move offshore during the evening hours as the short
wave/vorticity impulse associated with it moves to our east as
well.

As the front sinks to our south, a northeast-east flow will develop
across the area. There could be some light fog develop overnight,
but we do not expect much if any dense fog at this time as winds
will remain around 5-10 mph through the night and dewpoints are
expected to drop enough behind the front that rh values do not reach
high enough for widespread fog for most places.

With the front near the area, it is possible that some
isolated/scattered showers may develop overnight through daybreak
Sunday north of the frontal boundary.

Long term /Sunday through Friday/
Sunday... There is some question on how far south the front will
reach before stalling. The general trend with the 00z models was
to bring the front further south (possibly entirely south of our
forecast area). Where the front stalls will have implications
for both high temperatures Sunday as well as precip chances. As
mentioned by the previous shift, the GFS appears to be
overestimating the precip north of the front given relatively
dry air in the cool sector. Therefore, focused the pops through
this period on DELMARVA closer to the front. The front is
expected to return north as a warm front either late in the day
tomorrow or tomorrow night.

Monday... With the cold front still over the ohio valley, expect
a mostly sunny and dry day. A brisk south- west flow will
develop, with wind gusts up to around 30 mph in the afternoon.

Temperatures will be well above normal, with highs in the low
80s across the urban corridor. With the cold frontal passage
Monday night, showers and thunderstorms are likely. While the
timing is not ideal for severe weather and instability is
limited, the wind field is strong and precipitable water values
approach 2.0 inches, so gusty winds and heavy downpours are
likely with any thunderstorms, the primary focus being northwest
of the nj turnpike/i-95.

Tuesday and Wednesday... In the wake of the cold front,
temperatures will be about 5 to 10 degrees lower, with highs
generally in the 60s and 70s. Models have trended faster with
the dry air advection behind the front, so I trimmed back on
the pops on Tuesday. It is looking mostly dry both days.

Unsettled weather during the Thursday and Friday time frame. A broad
trough to our west will maintain a southwest flow aloft, along with
moisture of gulf of mexico origins moving up the eastern
seaboard, within an overrunning regime. Heavy rainfall is
certainly possible, with wpc guidance indicating the potential
for 1-2 inches across our region, but there is still inherent
uncertainty given it's day 6-7. Stay tuned.

Aviation /10z Saturday through Wednesday/
The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg,
kmiv, kacy and surrounding areas.

The first round of showers and thunderstorms has moved east of
the area early this morning. Some patchy light fog will occur at
a few sites early this morning. Then another round of showers,
possible thunderstorms, could affect the TAF sites later this
morning. Another round of showers and thunderstorms is more
likely later this afternoon which has a better chance of being
stronger storms with reductions to conditions.

Outside of the showers and thunderstorms,VFR conditions will
prevail through the daytime hours. However, as a backdoor cold front
sinks through the area later this evening and overnight, we expect
lower clouds and light fog to develop. At this time, we only
expect conditions to lower to MVFR, but there is the possibility
that conditions could lower to ifr overnight.

Winds are variable at many locations, but are generally out of the
southeast to south for most places where there is any direction.

Winds will increase out of the southwest this morning, before
becoming west then northwest through the day and into the afternoon
and evening. Winds could gust 15-20 knots for a period this
afternoon as well. Behind the frontal passage, winds will become
northeast this evening and overnight.

Outlook...

Sunday... MostlyVFR conditions expected.

Sunday night... MVFR or ifr conditions are possible with low clouds
and fog.

Monday... MostlyVFR conditions are expected although MVFR conditions
are possible with any showers or thunderstorms.

Monday night... Widespread MVFR or ifr conditions with thunderstorms
likely. An abrupt wind shift to westerly is expected with a cold
front Monday night.

Tuesday and Wednesday... MostlyVFR conditions expected.

Marine
Conditions on the coastal waters are expected to remain below small
craft advisory levels through today and tonight. Even though there
are some strong winds above the surface, there is a strong inversion
which will keep those winds fro mixing to the surface. However,
winds could gust around 20 knots and seas could reach 4 feet at
times through the day.

There is a chance of showers and thunderstorms across the waters.

Any thunderstorms will contain frequent lightning and may cause
strong gusty winds.

Outlook...

Sunday... Winds and seas are expected to be below SCA criteria.

Monday and Monday night... Building seas and increasing winds are
expected by Monday morning. Southerly gusts near or above 30 kt
are possible Monday evening.

Tuesday and Wednesday... Winds will shift to southwesterly and
then westerly behind a cold front expected early Tuesday. Gusts
on Tuesday may linger near 25 kt. Elevated seas may linger into
early Wednesday.

Climate
Record high temps listed today where it is forecast to be
within 2 degrees of record.

Phl 90-1974
ged 88-1990
ttn 88- 1974 & 1888
**record or number 2 warmest april on record expected**
presuming our forecast temps these last 2 days of april are
accurate, we are assured of a top 2 warmest april on record in
much of our forecast area. Sunday is probably the critical day
for determining record or not.

Below: april projected within the top april average temps, the
normal for april and the period of record (por).

This includes Friday's (28th) high and low temperatures through
4 pm.

Sundays MAX temps may occur at 1 am and the min temps Sunday
evening.

Phl normal 54.0 por 1874
59.5 2017 projected warmest ever: still could slip .2 degrees.

59.4 1994
58.5 1921
58.4 2010
57.9 1941
abe normal 49.9 por 1922
56.9 projecting record and almost cant miss a record.

56.4 1941
54.7 1994
acy normal 51.7 por 1874
57.6 projecting record and almost cant miss.

56.3 2010
56.1 2011

Phi watches/warnings/advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... None.

Synopsis... Johnson
near term... Robertson
short term... Robertson
long term... Franck/johnson
aviation... Johnson/robertson
marine... Johnson/robertson
climate... Drag


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LWSD1 - 8557380 - Lewes, DE 0 mi46 min SW 11 G 17 75°F 57°F1015.4 hPa
CMAN4 - 8536110 - Cape May, NJ 16 mi40 min SSW 17 G 25 72°F 60°F1013.5 hPa
OCIM2 - 8570283 - Ocean City Inlet, MD 31 mi46 min SW 11 G 12 61°F 60°F1018.3 hPa
44009 - DELAWARE BAY 26 NM Southeast of Cape May, NJ 31 mi38 min SSW 16 G 18 59°F 56°F4 ft1017.7 hPa (-0.4)59°F
SJSN4 - 8537121 - Ship John Shoal, NJ 39 mi40 min SW 21 G 23 71°F 60°F1014 hPa

Wind History for Lewes, DE
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Georgetown - Delaware Coastal Airport, DE14 mi34 minSSW 156.00 miFog/Mist75°F71°F88%1016.1 hPa
Wildwood, Cape May County Airport, NJ20 mi32 minSW 14 G 239.00 miFair71°F69°F94%1014.4 hPa

Wind History from GED (wind in knots)
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Last 24hrW7W8NW5NE45445SW8SE11SE11S8S5S6S6S5S6S5S7SW5SW10SW7SW11SW15
1 day agoSE3S6S5SW4SW6SW9SW9SW11S13S12
G20
S14S12S9S12S7S8S8S8S6SW7SW7SW6SW6SW6
2 days agoN7E7NE3NW4N5NW4N4CalmNW3W3W3CalmSW4CalmSE3S3S4S3--CalmCalmSE3E3SE3

Tide / Current Tables for Lewes, Fort Miles, Delaware
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Lewes
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Sat -- 05:32 AM EDT     -0.62 feet Low Tide
Sat -- 06:05 AM EDT     Sunrise
Sat -- 08:54 AM EDT     Moonrise
Sat -- 11:47 AM EDT     4.39 feet High Tide
Sat -- 05:37 PM EDT     -0.40 feet Low Tide
Sat -- 07:51 PM EDT     Sunset
Sat -- 11:35 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.44.63.21.70.3-0.5-0.60.11.12.33.54.24.4431.80.5-0.3-0.30.31.42.745

Tide / Current Tables for Delaware Bay Entrance, Delaware Current
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Delaware Bay Entrance
Click for Map
Sat -- 12:40 AM EDT     -0.00 knots Slack
Sat -- 04:19 AM EDT     -1.95 knots Max Ebb
Sat -- 06:04 AM EDT     Sunrise
Sat -- 07:17 AM EDT     0.00 knots Slack
Sat -- 08:54 AM EDT     Moonrise
Sat -- 10:02 AM EDT     1.78 knots Max Flood
Sat -- 01:09 PM EDT     -0.00 knots Slack
Sat -- 04:31 PM EDT     -1.62 knots Max Ebb
Sat -- 07:12 PM EDT     0.00 knots Slack
Sat -- 07:50 PM EDT     Sunset
Sat -- 10:15 PM EDT     2.00 knots Max Flood
Sat -- 11:35 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.6-0.3-1.1-1.6-1.9-1.8-1.2-0.30.71.51.81.50.90.1-0.7-1.2-1.6-1.6-1.1-0.20.71.621.8

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 (7,2,3,4)
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Ground Weather Radar Station Dover AFB, DE
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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.