Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Delaware City, 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 6:48AMSunset 7:25PM Wednesday March 29, 2017 11:10 AM EDT (15:10 UTC) Moonrise 7:01AMMoonset 8:22PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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- 911 Am Edt Wed Mar 29 2017
Today..NW winds 10 to 15 kt. Seas 1 to 2 ft.
Tonight..N winds 5 to 10 kt. Seas 1 foot or less.
Thu..NE winds around 5 kt...becoming se in the afternoon. Seas 1 to 2 ft in the morning...then 1 foot or less...then 1 to 2 ft early in the afternoon.
Thu night..SE winds 5 to 10 kt. Seas 1 to 2 ft. A chance of showers after midnight.
Fri..SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Showers.
Fri night..SE winds 10 to 15 kt with gusts up to 20 kt... Becoming S 5 to 10 kt after midnight. Seas 2 to 3 ft. Showers in the evening.
Sat..N winds 10 to 15 kt. Seas 1 to 2 ft.
Sat night..N winds 10 to 15 kt...diminishing to 5 to 10 kt after midnight. Seas 1 to 2 ft.
Sun..NW winds 5 to 10 kt. Seas 1 to 2 ft.
Sun night..NW winds around 5 kt. Seas 1 foot or less.
ANZ400 911 Am Edt Wed Mar 29 2017
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure near hudson's bay will build into our region through tonight. Low pressure moving through the ohio valley on Friday will redevelop near the new jersey coast Friday night and move offshore on Saturday. High pressure will move into the area for Sunday and Monday. Low pressure over the ohio valley and its associated fronts will approach our region on Tuesday.

7 Day Forecast for Marine Location Near Delaware City, DE
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location: 39.57, -75.59     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 291323
afdphi
area forecast discussion
national weather service mount holly nj
923 am edt Wed mar 29 2017

Synopsis
High pressure near hudson's bay will build into our region
through Wednesday night. Low pressure moving through the ohio
valley on Friday will redevelop near the new jersey coast
Friday night and move offshore on Saturday. High pressure
will move into the area for Sunday and Monday. Low pressure
over the ohio valley and its associated fronts will approach
our region on Tuesday.

Near term /until 6 pm this evening/
Low pressure south and east of montauk point will continue to
drift out to sea today as high pressure over hudson's bay builds
east. The pressure gradient tightens up a bit this morning, and
with slight caa, can expect NW winds 15-20 mph with gusts up to
25 mph this morning. Winds abate by late morning/early
afternoon as gradient relaxes.

Clouds over eastern and southern nj, and down into de will
continue to scatter out, and mostly sunny skies will develop
across the whole CWA by late morning/early afternoon.

Max temps in the mid 40s in the poconos, and in the low 50s
across northern nj. Otherwise, highs in the upper 50s to low 60s
across central/southern nj, SE pa, and in the low to mid 60s in
md/de.

Short term /6 pm this evening through 6 am Thursday/
Clear or mostly clear skies, a few fragments of sc in the early
eve and possibly a little cirrus. Some radiational cooling
expected. Light north wind. Normal or slightly below normal
mins.

Forecast basis: 50 50 blended 00z/29 gfs/nam MOS guidance. Applied
minor 1-2f cooler than guidance adjustments in our 330 am fcst
for tonight.

Long term /Thursday through Tuesday/
The primary players during the long term will be two southern
stream systems that are expected to impact our region in the
Friday-Saturday and Tuesday time frames.

The first system may produce 1 to 1.5 inches of rain across
portions of the region, especially in the delaware valley. While
there could be some urban and poor drainage flooding, we do not
expect any major impacts on rivers and streams. There is also a
consistent signal in the models for mixed precip north of i-80,
with sleet and freezing rain the primary concerns, during the
Friday night and Saturday morning period. We have mentioned this
in the hwo.

Looking ahead to early next week, the next system is expected to
bring more precip to our region Monday night into Tuesday. This
setup looks warmer, given the absence of high latitude blocking,
and would favor predominantly rain.

Aviation /13z Wednesday through Sunday/
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Today... MVFR CIGS across eastern/southern nj, mainly at
kmiv/kacy, will becomeVFR by 14-15z. Otherwise,VFR. Sct clouds
at 3500 ft possible this afternoon.

Nw winds around 15 kt with 20-25 kt gusts this morning,
diminishing to 10-15 kt by late afternoon.

Tonight...VFR with fragments of sc in the evening and maybe some
thin cirrus at times. Light north wind.

Outlook...

predominantlyVFR, except MVFR possible Friday into Saturday.

Marine
Ocnl 25 kt gusts possible until 11 am or so on the ocean waters
this morning, but 25 kt gusts should not be frequent enough or
widespread enough to warrant a sca.

Sca may be needed for anz450-51 (nnj tonight).

Elsewhere... Gusty north wind through the night to around 20-22
kt.

Outlook...

sca likely Friday into Saturday, with the potential for gale
force southeasterly wind gusts Friday night, mainly across the
northern nj waters. Otherwise, sub-sca.

Tides/coastal flooding
Though astronomical tides will be gradually diminishing through
the week now that we are past the new moon, the threat of minor
tidal flooding along the nj and de atlantic coasts increases
late in the week. This is a result of a low pressure system
bringing a prolonged period of onshore flow. The tide of most
concern at this point is the high tide on Friday evening/late
Friday night. By this tide cycle, it will take a surge of 0.8 to
1.0 feet to reach minor flooding thresholds, which is possible
but still uncertain (it will be dependent on how quickly the on
shore flow develops and how strong it will be by then). At least
one source of guidance shows water levels reaching minor tidal
flooding thresholds with the Thursday evening/night high tide,
but that seems unlikely as the latest forecast depicts onshore
flow either developing right around or just after the time of
that high tide.

We have mentioned the potential of minor flooding along the
northern nj coast in the hwo, where the threat is greatest
during the Friday evening/late Friday night high tide cycle.

Climate
Mo avg temps
march dep feb dep
abe 38.0 -1.1 39.2 +8.5
acy 41.6 -0.6 43.0 +7.7
ilg 41.7 -1.3 43.1 +8.0
phl 42.2 -1.3 44.2 +8.5
this march will be a below normal month for temps... . One of
the very few the last two years.

We appreciate that this is possibly old news, but march temperatures
will average colder than the feb average at all 4 long term climate
locations. The last time this occurred, 1984.

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

Nj... None.

De... None.

Md... None.

Marine... None.

Synopsis... Franck
near term... Mps
short term... Drag
long term... Franck
aviation... Drag/franck/mps
marine... Drag/franck
tides/coastal flooding...

climate...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RDYD1 - 8551910 - Reedy Point, DE 1 mi40 min 49°F 46°F1019.6 hPa
DELD1 - 8551762 - Delaware City, DE 1 mi40 min N 12 G 13 48°F 45°F1020 hPa
CHCM2 - 8573927 - Chesapeake City, MD 12 mi40 min NW 8 G 13 51°F 1019.8 hPa
MRCP1 - 8540433 - Marcus Hook, PA 19 mi40 min 50°F 1019.5 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 22 mi40 min 47°F 45°F1019.1 hPa
DRSD1 - Delaware Reserve, DE 34 mi55 min NNW 4.1 50°F 1020 hPa42°F
PHBP1 - 8545240 - Philadelphia, PA 35 mi40 min 50°F 44°F1019.4 hPa
BDSP1 39 mi40 min 48°F 1019.8 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 43 mi40 min N 8.9 G 11 49°F 48°F1020.9 hPa

Wind History for Delaware City, DE
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wilmington, New Castle County Airport, DE8 mi19 minNNE 1310.00 miFair53°F36°F52%1020.3 hPa

Wind History from ILG (wind in knots)
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Last 24hrE8NE12E7NE5N5N6NE6N6N10N7N10N4CalmCalmCalmNW5N8N12N13NW15N12N12
G21
N10N13
1 day agoCalmW6SW8SW7SW8SW5CalmCalmE4E5NE6E4NE7NE5NE7NE5NE6NE5NE7NE7N11NE13E9NE8
2 days agoE10E12E12NE9E10E10E11E11E11E11E9NE7NE8E8E9E6E7E7E5NE3CalmSE3N3Calm

Tide / Current Tables for Delaware City Branch Channel bridge, Delaware River, Delaware
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Delaware City Branch Channel bridge
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Wed -- 12:32 AM EDT     6.09 feet High Tide
Wed -- 06:51 AM EDT     Sunrise
Wed -- 07:39 AM EDT     -0.36 feet Low Tide
Wed -- 08:01 AM EDT     Moonrise
Wed -- 12:59 PM EDT     5.91 feet High Tide
Wed -- 07:23 PM EDT     Sunset
Wed -- 07:56 PM EDT     -0.16 feet Low Tide
Wed -- 09:21 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
665.242.61.40.5-0.2-0.30.72.64.45.55.95.54.431.80.80.1-0.20.52.24.2

Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
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Chesapeake and Delaware Canal
Click for Map
Wed -- 02:19 AM EDT     -2.21 knots Max Ebb
Wed -- 05:36 AM EDT     0.08 knots Slack
Wed -- 06:51 AM EDT     Sunrise
Wed -- 08:02 AM EDT     Moonrise
Wed -- 09:01 AM EDT     2.31 knots Max Flood
Wed -- 11:56 AM EDT     -0.04 knots Slack
Wed -- 02:51 PM EDT     -1.98 knots Max Ebb
Wed -- 05:55 PM EDT     0.07 knots Slack
Wed -- 07:24 PM EDT     Sunset
Wed -- 09:16 PM EDT     2.07 knots Max Flood
Wed -- 09:22 PM EDT     Moonset
Wed -- 11:42 PM EDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.5-2-2.2-2.1-1.7-10.81.62.12.32.11.5-0.4-1.4-1.9-2-1.7-1.20.31.21.82.121.3

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 (11,2,3,4)
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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.