Saturday, June24, 2017 L-36.com


Marine Weather and Tides
Dewey Beach, DE

Version 3.4
What's New / NOTES
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 5:38AMSunset 8:31PM Saturday June 24, 2017 6:16 AM EDT (10:16 UTC) Moonrise 5:17AMMoonset 8:02PM 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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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- 301 Am Edt Sat Jun 24 2017
.small craft advisory in effect through this afternoon...
Today..W winds 15 to 20 kt, diminishing to 5 to 10 kt late. Seas 4 to 6 ft, subsiding to 3 to 4 ft late. Mainly in S swell with a dominant period of 7 seconds. Showers likely this morning, then a chance of showers early this afternoon.
Tonight..W winds 5 to 10 kt, becoming nw late. Seas 3 to 4 ft. Mainly in S swell with a dominant period of 8 seconds.
Sun..N winds 5 to 10 kt, becoming nw in the late morning and early afternoon, then becoming W around 5 kt late. Seas around 3 ft early in the morning, then 2 ft or less. Mainly in S swell with a dominant period of 8 seconds.
Sun night..NW winds 5 to 10 kt. Waves 2 ft or less. Mainly in S swell with a dominant period of 8 seconds.
Mon..NW winds around 5 kt, becoming sw in the afternoon. Waves 2 ft or less.
Mon night..SW winds 5 to 10 kt, becoming W after midnight. Waves 2 ft or less.
Tue..NW winds 5 to 10 kt. Waves 2 ft or less.
Tue night..NW winds 5 to 10 kt. Waves 2 ft or less.
Wed..NW winds 5 to 10 kt, becoming W in the afternoon. Waves 2 ft or less.
Wed night..SW winds 5 to 10 kt. Seas around 3 ft.
ANZ400 301 Am Edt Sat Jun 24 2017
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. Tropical low pressure just west of the appalachians will lift to the northeast through the mid-atlantic and northeast this morning, and then a cold front will move across the region this afternoon. Surface high pressure builds into the midwest as an upper trough digs into the eastern great lakes and northeast tonight through Sunday. A weak cold front is expected to move through the region Monday night through Tuesday.

7 Day Forecast for Marine Location Near Dewey Beach, DE
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location: 38.67, -75.08     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 240718
afdphi
area forecast discussion
national weather service mount holly nj
318 am edt Sat jun 24 2017

Synopsis
Tropical low pressure just west of the appalachians will lift
to the northeast through the mid-atlantic and northeast this
morning, and then a cold front will move across the region this
afternoon. Surface high pressure builds into the midwest as an
upper trough digs into the eastern great lakes and northeast
tonight through Sunday. A weak cold front is expected to move
through the region Monday night through Tuesday. High pressure
returns to the area for the middle of next week before moving
off the coast late in the week as low pressure passes north of
the region.

Near term until 6 pm this evening
Much of the weather action will begin shortly after afd release
with a decent batch of showers and scattered thunder associated
with a front and the remnant moisture from TS cindy moving
across the area. The warm and tropical airmass in place will
create decent rainfall rates this morning with some 1-2 inch
totals expected thru mid- morning. Once the front crosses the
area, winds will shift to NW and rapid improvement from NW to se
will progress thru the area. Sunny skies will be across the
region by this afternoon. It will remain very warm, but the
airmass will become drier as the day progresses. Highs will
reach the mid-upper 80s in most areas today. Winds will gust to
20-25 mph for much of the day.

Short term 6 pm this evening through 6 pm Sunday
High pressure well to the west will begin to ridge across the
area tonight. Fair weather with mostly clear skies are expected.

Low temperatures will remain in the mid 60s to around 70 in
most areas. The airmass will be much more comfortable tonight
than in recent nights.

Long term Sunday night through Friday
Surface high pressure builds into the midwest and western great
lakes Sunday morning. Dry conditions with low humidity on tap
for most of the region, and downsloping westerly flow will push
temperatures into the mid and upper 80s across the delmarva,
southeast pa, and much of nj, and in the low to mid 80s for the
lehigh valley, poconos, and northwest nj. Surface dewpoints will
generally be in the 50s. With an upper trough digging through
the eastern great lakes and northeast, some shortwave energy
will pass through the base of the trough, and could touch off
some isolated showers and thunderstorms in the afternoon, mainly
over the poconos.

Conditions dry out Sunday night. Cool and dry with lows in the
50s to low 60s.

Surface high pressure continues to build into the oh tn valleys
on Monday as h5 low moves into great lakes and upper trough
becomes entrenched over the great lakes, northeast, and into the
mid- atlantic. With shortwave energy rotating around the base
of the trough, some isolated to scattered showers and
thunderstorms are possible, and then coverage becomes slightly
more widespread on Tuesday as the base of the trough and a
surface cold front passes through the region and moves offshore.

Surface high pressure continues to slowly build east through
Wednesday, and then the center of the high moves off the mid-
atlantic coast by Wednesday night.

For Monday through Wednesday, temperatures will be on the cool
and dry side, with highs generally in the upper 70s to low 80s
to start the week, and then in the low to mid 70s for the mid-
week period. Dewpoints will be in the 50s. Overnight lows will
be in the 50s to low 60s.

With high pressure now off the mid-atlantic coast, return flow
sets up, and temperatures return back into the mid 80s, and
surface dewpoints creep back up into the low to mid 60s.

By Friday, low pressure moves into the great lakes, and some
mid-level shortwave energy spins off ahead of the low, and may
touch off some scattered showers and thunderstorms. Temperatures
once again rise into the upper 80s to around 90, along with
dewpoints in the mid to upper 60s.

Aviation 07z Saturday through Wednesday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

A period of poor flying weather thru the mid-morning before a
return back toVFR across the region. Prior to the mid-morning,
showers and isolated thunder with lower CIGS and vsbys expected
across most areas with the remnants of cindy and a front
affecting the weather. S to SW winds ahead of the system will
swing abruptly to NW around dawn and gust around 20-25 kts at
times. Later today, clearing and NW winds backing to W late.

Tonight...VFR, clear skies and light winds expected.

Outlook...

Sunday...VFR. West winds 8-12 kt. Gusts to 19 kt possible in
the afternoon.

Sunday night...VFR. Light NW winds.

Monday...VFR. West to southwest winds 5-10 kt. Isolated
shra tsra possible in the afternoon, mainly north west of the
i-95 corridor terminals.

Monday night...VFR. Light west winds.

Tuesday... MainlyVFR. Sub-vfr conditions possible in scattered
shra tsra in the afternoon.

Tuesday night through Wednesday...VFR.

Marine
We will add the SCA flag for delaware bay with frequent gusts to 25
knt ATTM which will likely continue until after the low front cross
the area this morning. The SCA for the ocean will remain for the day
with seas expected to remain above 5 ft thru the period. Rains and
psbl thunder this morning, then rapid improvement by early
afternoon. Fair weather expected tonight.

Outlook...

Sunday through Wednesday... Winds and seas are expected to remain
below SCA criteria. Scattered thunderstorms possible on Tuesday.

Rip currents...

today, winds will be shifting off shore, but a 5 to 6 ft swell
may lead to a moderate risk for the formation of dangerous rip
currents especially along the central and southern nj shore. For
the northern nj shore and the delaware beaches, the risk is
expected to be low at this time. However, even with a low
risk... The bigger diurnal difference in the tide cycle due to
the new moon today could mean some rapidly changing conditions.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... Small craft advisory until 6 pm edt this evening for
anz450>455.

Small craft advisory until noon edt today for anz430-431.

Synopsis... Mps
near term... O'hara
short term... O'hara
long term... Mps
aviation... Mps o'hara
marine... Mps o'hara
tides coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LWSD1 - 8557380 - Lewes, DE 8 mi46 min SW 8.9 G 15 82°F 65°F1002.9 hPa
CMAN4 - 8536110 - Cape May, NJ 22 mi46 min SSE 9.9 G 13 72°F 68°F1002.7 hPa
BRND1 - 8555889 - Brandywine Shoal Light, DE 22 mi46 min SSW 25 G 29 79°F 1002.6 hPa
OCIM2 - 8570283 - Ocean City Inlet, MD 24 mi52 min SW 19 G 23 67°F 70°F1005 hPa
44009 - DELAWARE BAY 26 NM Southeast of Cape May, NJ 25 mi86 min SSW 21 G 25 71°F 66°F6 ft1004.9 hPa (-2.0)70°F
DRSD1 - Delaware Reserve, DE 35 mi61 min S 11 80°F 1002 hPa75°F
SJSN4 - 8537121 - Ship John Shoal, NJ 47 mi46 min SSW 22 G 28 81°F 78°F1000.9 hPa

Wind History for Lewes, DE
(wind in knots)    EDIT      (on/off)   Help
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SW1
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SW8
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SE3
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Georgetown - Delaware Coastal Airport, DE15 mi22 minSSW 19 G 2610.00 miMostly Cloudy and Breezy82°F73°F74%1003.1 hPa

Wind History from GED (wind in knots)
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1 day agoCalmCalmCalmNE4S456SW7W7SW5W5SW9SW5CalmS4CalmSW4SW4SW4SW4SW5SW5SW7SW6
2 days agoSW9SW7SW14SW9SW8
G15
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G14
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SW11SW10
G20
SW10SW12SW9S10N5CalmN4CalmCalmCalmCalmCalmCalm

Tide / Current Tables for Rehoboth Beach, Delaware
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Rehoboth Beach
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Sat -- 02:30 AM EDT     -0.70 feet Low Tide
Sat -- 05:36 AM EDT     Sunrise
Sat -- 06:17 AM EDT     Moonrise
Sat -- 08:34 AM EDT     4.54 feet High Tide
Sat -- 02:32 PM EDT     -0.48 feet Low Tide
Sat -- 08:29 PM EDT     Sunset
Sat -- 08:50 PM EDT     5.49 feet High Tide
Sat -- 09:02 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.2-0.6-0.60.21.42.73.84.44.53.82.61.40.3-0.4-0.40.41.73.24.45.35.553.8

Tide / Current Tables for Delaware Bay Entrance, Delaware Current
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Delaware Bay Entrance
Click for Map
Sat -- 02:00 AM EDT     -2.06 knots Max Ebb
Sat -- 05:00 AM EDT     0.00 knots Slack
Sat -- 05:36 AM EDT     Sunrise
Sat -- 06:16 AM EDT     Moonrise
Sat -- 07:42 AM EDT     1.82 knots Max Flood
Sat -- 10:47 AM EDT     -0.00 knots Slack
Sat -- 02:11 PM EDT     -1.71 knots Max Ebb
Sat -- 04:49 PM EDT     0.00 knots Slack
Sat -- 07:53 PM EDT     2.18 knots Max Flood
Sat -- 08:29 PM EDT     Sunset
Sat -- 09:02 PM EDT     Moonset
Sat -- 11:13 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.3-1.8-2.1-1.8-1-011.71.81.40.7-0.2-0.9-1.4-1.7-1.5-0.80.21.21.92.21.81.10.2

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 (6,6,7,8)
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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.