Wednesday, April8, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Washington Boro, PA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:35AMSunset 7:38PM Wednesday April 8, 2020 8:20 AM EDT (12:20 UTC) Moonrise 7:32PMMoonset 6:16AM Illumination 100% Phase: Full Moon; Moon at 15 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
    EDIT      (on/off)   Help
ANZ530 Chesapeake Bay North Of Pooles Island- 737 Am Edt Wed Apr 8 2020
.small craft advisory in effect from 11 am edt this morning through this evening...
Today..W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms this morning, then a slight chance of showers and tstms this afternoon.
Tonight..NW winds 10 to 15 kt with gusts to 20 kt... Becoming ne 5 kt in the late evening and overnight. Waves 2 ft...subsiding to flat after midnight.
Thu..S winds 10 to 15 kt with gusts to 20 kt... Becoming W 15 to 20 kt with gusts to 30 kt in the afternoon. Waves 1 to 2 ft. Showers.
Thu night..W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
Fri..W winds 15 to 20 kt with gusts to 30 kt. Waves 2 to 3 ft.
Fri night..NW winds 15 to 20 kt...diminishing to 10 kt after midnight. Gusts up to 25 kt. Waves 1 to 2 ft.
Sat..W winds 5 to 10 kt...becoming S after midnight. Waves 1 ft or less.
Sun..SE winds 10 to 15 kt. Waves 1 ft. A chance of rain through the day, then rain through the night. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 737 Am Edt Wed Apr 8 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A weak frontal boundary will pass through the waters later today followed by a stronger cold front on Thursday, resulting in yet another threat of showers and Thunderstorms Thunderstorms. Small craft advisories will likely be needed this afternoon, and again Thursday through Saturday. A gale warning may be needed for portions of the waters Thursday and Friday.


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


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KLWX 080756 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 356 AM EDT Wed Apr 8 2020

SYNOPSIS.

A front will drop southward through our region this morning. A strong cold front moves through our area on Thursday. A Canadian high pressure builds over our area Friday through Saturday before low pressure possibly impacts the area early next week.

NEAR TERM /UNTIL 7 AM THIS MORNING/.

A line of storms are moving through our region this morning. The storms should continue to weakened as they progress further through our area as they enter more stable air which should inhibit further severe potential. An isolated severe thunderstorm can't be ruled out over the next few hours as a Severe Thunderstorm Watch remains in effect until 6am. The main threat will be damaging winds but isolated instances of large hail can't be ruled out. The line of storm should be through our region by the middle parts of this morning.

A cold front to our northwest which is driving the line of storms will move through our region later this morning. As the front moves through our area, additional showers and storms will be possible this morning and into the early afternoon. As temperatures are expected to warm up into the mid to upper 70s to low 80s, conditions may be favorable for a few isolated strong to severe thunderstorms to form along the boundary especially in areas in central Virginia. The threat for showers and thunderstorms should continue to wane into this afternoon as the front moves further south of our region and we become positioned on the cold side of the front. Dry conditions are expected this evening. Chances for showers and thunderstorms will increase early Thursday morning as stronger cold front approaches from the west.

SHORT TERM /7 AM THIS MORNING THROUGH FRIDAY NIGHT/.

A strong cold front will move through our region early Thursday morning and continue through our area into the afternoon. A strong upper level jet will shift northward and help to enhance lift along the frontal boundary as it moves through our forecast area. HiRes guidance is hinted at the formation of squall line feature that forms during the early morning periods Thursday and progresses eastward through our area by the early Thursday afternoon. This line has the potential to develop thunderstorms capable of producing strong to damaging winds but there remains uncertainty whether this line will hold together through our area.

Behind the frontal passage, a strong pressure gradient will lead to gusty winds of 25 to 35 knots with locally higher gusts possible. High pressure will build into our region through Friday but strong winds could linger into Friday. A cooler air mass will move into our region on Friday with temperatures running much cooler in the upper 40s and 50s with overnight lows in the 30s Friday night. As temps drop near freezing along with winds becoming light, there is potential that frost/freeze advisory may need to be issued for Friday night but there remains a lot of uncertainty at this time.

LONG TERM /SATURDAY THROUGH TUESDAY/.

The aforementioned area of high pressure will push offshore on Sunday, with southerly flow returning, bringing warmer and more moist air into the region. Initial thoughts are that the first half of the day stays dry. However, a potent cutoff upper low, previously sitting over the desert southwest, will be moving out over the southeast. Surface low pressure will form over the Arklatex and move off generally towards our region. Guidance is spread about how exactly this will evolve. Maintaining thoughts from yesterday that this has the potential to be an impactful event for the region in one of two ways. The first option is that the system tracks to our south, but we are solidly within the heavy rain threat, so flooding concerns could arise. The other possibility is for the system to track into the Ohio Valley, and bring a cold front through late Sunday or Monday (timing is still very much in flux), which would result in the potential for some severe weather. This is out near the end of the forecast period, so not locking onto any particular solution at this time, but at this point, these are the two scenarios that the guidance is coming up with.

AVIATION /08Z WEDNESDAY THROUGH SUNDAY/.

A line of showers and thunderstorms will move through the terminals this morning. The terminals most likely to experience thunderstorms are Martinsburg, BWI, and MTN with thunderstorms possibly reaching DCA,IAD, and CHO later this morning. A period of showers are expected for all terminals and brief MVFR to IFR conditions can't be ruled out within storms. Showers and thunderstorms should shift further southward this afternoon leading to mainly VFR conditions with gusts of 15 to 20kts this afternoon.

A strong cold front will move through our terminals from the west early Thursday morning through the afternoon periods. MRB and CHO terminals will be the first to experience any precipitation with this system and there is the potential for thunderstorm capable of producing strong gusty winds forming along the cold front. Behind the frontal passage, VFR conditions along with strong and gusty winds of 25 to 35 knots out of the west-northwest will move into behind the front. These conditions are expected to continue into early Friday. Winds should start to taper off Friday afternoon with VFR conditions expected to continue.

Winds will gradually diminish Friday night, with VFR conditions expected to continue through the day on Saturday. SubVFR conditions may return Sunday as rain potential moves back into our region.

MARINE.

A line of storms will move through the waters this morning bring strong and gusty winds and isolated hail. Behind these storms, winds will pick up and be 18 to 22knots this afternoon. A Small Craft Advisory is in effect for this afternoon. A strong cold front will move through the waters on Thursday. Strong and gusty winds are expected along and behind the front. Gusts of 25 to 35 knots are expected. Small Craft Advisories are likely Thursday and Friday with Gale Warnings possible Thursday afternoon into Friday.

SCA conditions will be possible both Saturday and Sunday.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory from 11 AM this morning to 8 PM EDT this evening for ANZ530>543.

SYNOPSIS . JMG NEAR TERM . JMG SHORT TERM . JMG LONG TERM . CJL AVIATION . CJL/JMG MARINE . CJL/JMG


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHCM2 - 8573927 - Chesapeake City, MD 49 mi50 min W 5.1 G 6 57°F 54°F1000.8 hPa
BLTM2 - 8574680 - Baltimore, MD 51 mi50 min WSW 5.1 G 6 58°F 56°F1000 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 54 mi50 min WSW 8.9 G 9.9 58°F 1000.8 hPa

Wind History for Chesapeake City, MD
(wind in knots)    EDIT      (on/off)   Help
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
Last
24hr
SE3
SE2
S3
G6
W1
G4
S4
E4
G8
E7
E4
E3
SE3
S1
G4
--
--
SW2
W2
--
W2
G6
W5
G10
S4
SW5
SW4
SW5
W4
W4
G7
1 day
ago
N6
G12
N4
G10
N9
N5
G13
N10
G14
NW7
G12
NW6
G13
N5
G10
N7
G11
NW6
NW5
NW2
--
--
SW1
S1
W1
SE2
--
--
NE1
--
SE1
NE1
2 days
ago
W4
G8
SW5
G9
W5
G8
S6
G9
W5
G10
W7
G12
SW4
G10
W5
W6
G10
S8
S3
SW3
SW2
--
NW1
SW4
S3
W2
SW1
NW2
NW1
N2
N5
G8
N5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lancaster, Lancaster Airport, PA13 mi27 minW 410.00 miFair56°F52°F87%1000.4 hPa
Harrisburg, Harrisburg International Airport, PA21 mi24 minNW 310.00 miFair55°F53°F93%1000.8 hPa
York, York Airport, PA21 mi27 minN 010.00 miFair55°F50°F83%1000.8 hPa

Link to 5 minute data for KLNS

Wind History from LNS (wind in knots)
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
Last 24hrE6E5SE5E3CalmCalmW8W84SW9SW7SW8SW6SW5SW5CalmCalmS4S3NW12
G17
SW8W9W8W4
1 day agoN9N6--N7N8W7
G14
NW10NW7
G16
NW9NW9NW6CalmCalmCalmCalmCalmE3E3E4E4CalmE5CalmE5
2 days agoW4W54W7--W8W94W7CalmCalmCalmS7S6S3SW4CalmW7N9N9N6N8N4N6

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Port Deposit
Click for Map
Wed -- 06:24 AM EDT     0.20 feet Low Tide
Wed -- 06:36 AM EDT     Sunrise
Wed -- 07:14 AM EDT     Moonset
Wed -- 11:30 AM EDT     3.23 feet High Tide
Wed -- 07:18 PM EDT     -0.03 feet Low Tide
Wed -- 07:35 PM EDT     Sunset
Wed -- 08:30 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
2.62.31.81.30.80.40.20.30.81.72.63.23.22.92.41.81.20.60.2-00.10.71.52.2

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland
   EDIT      (on/off)   Help   One Week of Data
Havre de Grace
Click for Map
Wed -- 04:56 AM EDT     0.06 feet Low Tide
Wed -- 06:36 AM EDT     Sunrise
Wed -- 07:14 AM EDT     Moonset
Wed -- 10:41 AM EDT     2.72 feet High Tide
Wed -- 05:39 PM EDT     0.06 feet Low Tide
Wed -- 07:35 PM EDT     Sunset
Wed -- 08:30 PM EDT     Moonrise
Wed -- 11:08 PM EDT     2.34 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
21.61.10.60.20.10.30.81.62.22.62.72.52.11.510.50.10.10.411.62.12.3

Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS Local Image of Mid-Atlantic    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.
Link to Loop



Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (8,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Dover AFB, DE
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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 numerous 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.