Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Washington Boro, PA

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 6:21AMSunset 7:55PM Sunday August 20, 2017 12:12 AM EDT (04:12 UTC) Moonrise 3:57AMMoonset 6:18PM Illumination 5% Phase: Waning Crescent; Moon at 27 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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ANZ530 Chesapeake Bay North Of Pooles Island- 1031 Pm Edt Sat Aug 19 2017
Rest of tonight..NW winds 5 kt. Waves less than 1 ft. Scattered showers with isolated tstms late this evening, then a slight chance of showers.
Sun..NW winds 5 kt. Waves less than 1 ft.
Sun night..SE winds around 5 kt. Waves flat.
Mon..S winds around 5 kt. Waves flat.
Mon night..S winds 5 to 10 kt. Waves 1 ft.
Tue..SW winds 5 to 10 kt. Waves 1 ft.
Tue night..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed..NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Thu..N winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1031 Pm Edt Sat Aug 19 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Weak high pressure will build over the waters through this afternoon. A weak reinforcing cold front will pass through the area this evening and high pressure will return for Sunday. The high will move offshore Monday and a stronger cold front will approach Tuesday before passing through Wednesday. High pressure will build overhead behind this boundary. Small craft advisories will likely be needed Tuesday into Wednesday.

7 Day Forecast for Marine Location Near Washington Boro CDP, PA
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location: 40, -76.49     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 200125 aaa
afdlwx
area forecast discussion... Updated
national weather service baltimore md washington dc
925 pm edt Sat aug 19 2017

Synopsis
Weak high pressure will build in today... But an upper-level disturbance
and reinforcing cold front will pass through the area this evening.

High pressure will build overhead late tonight through Sunday
before moving offshore Monday. High pressure will remain offshore
Tuesday and a stronger cold front will pass through Wednesday.

High pressure returns for the second half of the week.

Near term through Sunday
Scattered showers and isolated thunderstorms will continue for
the next couple of hours until upper level trof passes over the
area around midnight. Gust front well out ahead of the showers
with common gusts 25 to 30 mph behind it. Skies become clear
quickly after midnight.

Short term Sunday night through Monday night
High pressure will move off the coast by Monday morning. Southerly
flow will increase resulting in the return of warm and humid
conditions. Westerly flow aloft will lead to the potential upper
level disturbances to pass across the mid-atlantic region. A cu
field will likely develop by afternoon and showers and
thunderstorms are possible. At this time... Disorganized activity
is expected through the afternoon and early evening. Any
convection will likely wane Monday night resulting in mild and
dry conditions.

Long term Tuesday through Saturday
A cold front is expected to move into the ohio valley Tuesday
afternoon. This will present a chance of thunderstorms across
teh northern part of our forecast area by mid late afternoon,
and across the entire region Tuesday night as the front moves
into pa. The chance should persist through at least midday
Wednesday.

Ahead of the front east of the mountains highs Tuesday will
reach the 90 degree mark, with lows in the lower to mid 70s.

Wednesday highs should drop back into the 80s.

High pressure will decend out of the upper great lakes and
bring some very pleasant weather to the region for the second
half of the week. Lows Thursday and Friday night will drop
into the 50s west of the mountains, and lower 60s east. Highs
Thursday through Saturday around 80.

Aviation 02z Sunday through Thursday
Vfr conditions are expected most of the time through Wednesday.

An isolated shower or thunderstorm is possible late this afternoon
and evening across the northern terminals... But most areas will be
dry. Patchy fog cannot be ruled out early Sunday morning.

Scattered thunderstorms are possible later Monday into Monday night
as a southerly flow allow for more atmospheric moisture to return.

A cold front is expected to move into pa Tuesday night... And
cross the bay midday Wednesday. Thunderstorms sub-vfr weather
will be possible during this time.VFR conditions to end the day
Wednesday.

Marine
A reinforcing cold front will pass through the waters this evening.

A pop up shower cannot be ruled out but most areas will be dry.

High pressure will build overhead for Sunday before moving offshore
Monday. A return southerly flow will develop Monday and persist
through Tuesday night ahead of a cold front.

A cold front is expected to push through the waters by midday
Wednesday. Showers and thunderstorms will be possible beginning
late Tuesday afternoon. Wind gusts may reach SCA levels Tuesday
and Wednesday.

Tides coastal flooding
Waters may rise to minor levels at annapolis Monday.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Update... Lfr
products... Hsk woody!


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44057 - Susquehanna, MD 39 mi32 min NW 5.8 G 7.8 73°F 1014.5 hPa
CHCM2 - 8573927 - Chesapeake City, MD 49 mi42 min NNW 1.9 G 4.1 75°F 83°F1014.5 hPa
BLTM2 - 8574680 - Baltimore, MD 51 mi42 min N 1.9 G 4.1 73°F 84°F1014.4 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 54 mi42 min W 5.1 G 5.1 73°F 1014.7 hPa

Wind History for Chesapeake City, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lancaster, Lancaster Airport, PA13 mi19 minN 010.00 miFair65°F63°F93%1014.9 hPa
York, York Airport, PA21 mi19 minN 010.00 miFair63°F63°F100%1015.6 hPa
Harrisburg, Harrisburg International Airport, PA21 mi16 minWNW 510.00 miPartly Cloudy67°F62°F84%1015 hPa

Wind History from LNS (wind in knots)
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Last 24hrS4SW3W3W7W8W6W5W5W4W6NW8NW12W6W86W7W9W7SW9SW7W9W5NW3Calm
1 day agoS5S5CalmS4SE4SE4SE5S3S4S5S76S8S10S13
G20
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2 days agoCalmCalmCalmE3E4CalmCalmCalmE4E4SE5SE7SE4SE8E8S7SE7SE6S11S7SE4SE5SE3SE5

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
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Port Deposit
Click for Map
Sun -- 04:22 AM EDT     0.58 feet Low Tide
Sun -- 04:56 AM EDT     Moonrise
Sun -- 06:21 AM EDT     Sunrise
Sun -- 10:05 AM EDT     3.95 feet High Tide
Sun -- 06:10 PM EDT     0.92 feet Low Tide
Sun -- 07:15 PM EDT     Moonset
Sun -- 07:53 PM EDT     Sunset
Sun -- 10:17 PM EDT     2.75 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.91.51.10.80.60.71.122.93.73.93.83.53.12.621.51.10.91.11.72.42.72.7

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland
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Havre de Grace
Click for Map
Sun -- 02:59 AM EDT     0.24 feet Low Tide
Sun -- 04:56 AM EDT     Moonrise
Sun -- 06:21 AM EDT     Sunrise
Sun -- 08:53 AM EDT     2.76 feet High Tide
Sun -- 04:19 PM EDT     0.16 feet Low Tide
Sun -- 07:15 PM EDT     Moonset
Sun -- 07:52 PM EDT     Sunset
Sun -- 09:39 PM EDT     2.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.10.70.40.20.40.91.52.22.62.82.62.31.81.40.90.40.20.20.61.21.722.11.9

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 Baltimore, MD/Washington (0,6,7,8)
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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.