Saturday, December16, 2017 L-36.com


Marine Weather and Tides
Bowleys Quarters, MD

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 7:18AMSunset 4:45PM Saturday December 16, 2017 7:20 PM EST (00:20 UTC) Moonrise 5:36AMMoonset 3:59PM Illumination 2% Phase: Waning Crescent; Moon at 28 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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ANZ531 Chesapeake Bay From Pooles Island To Sandy Point- 632 Pm Est Sat Dec 16 2017
Tonight..SW winds 5 to 10 kt...becoming N after midnight. Waves 1 to 2 ft.
Sun..SE winds 5 kt. Waves flat.
Sun night..W winds around 5 kt. Waves flat. A chance of rain.
Mon..SW winds around 5 kt. Waves flat.
Mon night..SW winds 5 kt. Waves less than 1 ft.
Tue..SW winds 5 to 10 kt. Waves 1 ft.
Tue night..W winds 5 to 10 kt. Waves 1 ft.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Thu..SE winds 5 kt. Waves less than 1 ft. A chance of rain or freezing rain through the night.
ANZ500 632 Pm Est Sat Dec 16 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain south of the waters through Sunday. A backdoor cold front will approach from the north tonight, then return north as a warm front Sunday night. High pressure will influence the weather Tuesday before a trough of low pressure crosses Tuesday night. A small craft advisory is possible Tuesday night into Wednesday.

7 Day Forecast for Marine Location Near Bowleys Quarters, MD
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location: 39.33, -76.33     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 162009
afdlwx
area forecast discussion
national weather service baltimore md washington dc
309 pm est Sat dec 16 2017

Synopsis
Weak backdoor front will slip south into the area late tonight
and Sunday. A weak upper level disturbance will cross the area
Sunday night. A warm front will lift north across the region
Monday. A cold front will drop south across the region Tuesday
night. High pressure will dominate Wednesday and Thursday.

Near term until 6 am Sunday morning
High pressure dominates at present, centered to the south, but a
cold front is slowly slipping toward us from the north. The
front will drop into the region late tonight, but with limited
if any sensible weather impact. High pressure will be the true
dominating factor in the weather tonight, with radiational
cooling allowing temps to drop back below freezing in most
areas. Winds will lighten quickly after sunset.

Short term 6 am Sunday morning through Monday night
Backdoor front stalls out in the area Sunday before essentially
dissipating. Thus, temps on Sunday, while starting chilly,
should not be significantly different from today. However,
clouds will be increasing ahead of a weakening shortwave which
is currently over western texas. The clouds will move in, but
the rain will be falling apart as the shortwave rides over the
top of a ridge to our south and forcing falls apart. Temps will
be marginal, so will have to look for potential mixed precip at
elevation and at night, mainly along the fringes of the cwa
(allgheny front and mason-dixon line), but right now it looks
like impacts will be minimal.

Warm front lifts north Monday with temps rising into the 50s
most areas. Upslope showers may linger along allegheny front,
but most areas dry. Staying mild at night with lows above
freezing most spots.

Long term Tuesday through Saturday
Split upper level flow will be in place during the middle of
the week. Tuesday will likely be mild (50s to perhaps lower 60s)
if not a bit cloudy in between northern and southern stream
systems with a light southwest surface flow. Trough axis from
northern stream system will drop through the area by Tuesday
night, although it will be dry outside of a little upslope snow.

Wednesday could be breezy in the wake of the trough, and
temperatures will return closer to normal.

The 12z model suite is in a bit better agreement with keeping a
southern stream low pressure system suppressed to the south
(i.E., carolinas) Wednesday afternoon and night. With that said,
forecast QPF is close enough to central va that it will bear
watching since precipitation could take wintry form.

High pressure slides across the great lakes toward new england
Thursday into Friday. The high eventually becomes in a position
favorable for cold air damming, although at this time there
aren't any strong indications of clouds or precipitation, as a
subtropical ridge encroaches on the southeastern states. This is
subject to change pending any weak waves. Temperatures should
remain fairly close to normal.

The next upper trough will push toward the east coast Friday
into Saturday. This is the time period where guidance begins to
deviate the most since the northern and southern streams could
eventually phase. Meanwhile the subtropical ridge could attempt
to stay dominant to the southeast. Precipitation chances will be
increasing since the associated cold front could be slow
moving. Precipitation types could eventually become tricky over
parts of the area depending where the baroclinic zone settles
and if additional energy rides along it. Overall not looking at
any major blasts of cold air within the forecast period though.

Aviation 20z Saturday through Thursday
Vfr likely through Monday night. Main concern is isolated
showers late Sunday Sunday night which could drop CIGS and vis.

Winds will drop off quickly this evening and stay fairly light
through Monday night.

Vfr is anticipated for Tuesday through Thursday at the moment,
although a low pressure system won't be too far away to the
south on Wednesday that is worth watching. Northwest winds could
gust to 25 kt on Wednesday behind a low pressure trough.

Marine
Sca remains in effect at present, but winds should drop off
quicly this evening and stay fairly light through Monday
night,so no plans for additional sca's at present.

Southwest winds will begin increasing Tuesday. A trough of low
pressure will cross Tuesday night, with winds becoming
northwesterly and increasing further. A small craft advisory
will be possible through Wednesday. Lighter winds can be
expected Wednesday night into Thursday as high pressure builds
into the area.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 7 pm est this evening for
anz530>543.

Synopsis... Rcm
near term... Rcm
short term... Rcm
long term... Ads
aviation... Ads rcm
marine... Ads rcm


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCBM2 - 8573364 - Tolchester Beach, MD 9 mi51 min SSW 6 G 9.9 42°F 39°F1020.6 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 13 mi51 min SW 5.1 G 6 42°F 1020.4 hPa
FSNM2 13 mi51 min SW 2.9 G 7 43°F 1019.8 hPa
BLTM2 - 8574680 - Baltimore, MD 14 mi51 min Calm G 1.9 41°F 46°F1020 hPa
CPVM2 23 mi51 min 44°F 31°F
APAM2 - 8575512 - Annapolis, MD 25 mi51 min 41°F 1020.1 hPa
TPLM2 - Thomas Point, MD 30 mi81 min SSW 9.9 G 11 44°F 44°F
CHCM2 - 8573927 - Chesapeake City, MD 31 mi51 min SSW 1.9 G 2.9 38°F 37°F1020.3 hPa
DELD1 - 8551762 - Delaware City, DE 43 mi51 min SW 2.9 G 5.1 37°F 37°F1019.9 hPa
RDYD1 - 8551910 - Reedy Point, DE 43 mi51 min 36°F 40°F1019.5 hPa
BSLM2 - Chesapeake Bay, MD 43 mi111 min S 1.9 41°F 1020 hPa25°F
WASD2 - 8594900 - Washington, DC 48 mi51 min SSW 4.1 G 5.1 42°F 39°F1020.6 hPa

Wind History for Tolchester Beach, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore / Martin, MD5 mi36 minSSW 310.00 miClear37°F26°F65%1021.3 hPa
Phillips Army Air Field / Aberdeen, MD13 mi83 minWSW 610.00 miFair0°F0°F%1020.3 hPa
Baltimore, Inner Harbor, MD15 mi27 minno data mi41°F25°F53%1020.5 hPa
Baltimore, Baltimore-Washington International Airport, MD20 mi27 minSW 310.00 miFair38°F23°F55%1020.8 hPa
Bay Bridge Field, MD24 mi36 minSSW 410.00 miFair41°F26°F57%1021 hPa

Wind History from MTN (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS3SW4SW3SW6SW5S7S9
G15
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1 day agoNW5CalmNW6NW4NW6NW4CalmCalmCalmCalmCalmCalmCalmCalmE4NE4CalmCalmCalmCalmNW3NW3CalmCalm
2 days agoCalmSW10CalmCalmCalmCalmS3CalmS3S7S7SW5SW5W10W17
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Tide / Current Tables for Battery Point, Gunpowder River, Maryland
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Battery Point
Click for Map
Sat -- 01:13 AM EST     0.11 feet Low Tide
Sat -- 05:35 AM EST     Moonrise
Sat -- 05:53 AM EST     0.83 feet High Tide
Sat -- 07:18 AM EST     Sunrise
Sat -- 12:12 PM EST     -0.26 feet Low Tide
Sat -- 03:58 PM EST     Moonset
Sat -- 04:43 PM EST     Sunset
Sat -- 06:56 PM EST     1.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.10.20.30.60.80.80.70.50.30-0.2-0.3-0.200.30.71.11.31.41.31.10.90.6

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Sat -- 01:35 AM EST     0.00 knots Slack
Sat -- 03:58 AM EST     0.48 knots Max Flood
Sat -- 05:34 AM EST     Moonrise
Sat -- 06:29 AM EST     -0.00 knots Slack
Sat -- 07:18 AM EST     Sunrise
Sat -- 09:29 AM EST     -0.65 knots Max Ebb
Sat -- 12:10 PM EST     0.00 knots Slack
Sat -- 03:54 PM EST     1.15 knots Max Flood
Sat -- 03:59 PM EST     Moonset
Sat -- 04:44 PM EST     Sunset
Sat -- 07:23 PM EST     -0.00 knots Slack
Sat -- 10:41 PM EST     -1.03 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-0.20.10.40.50.40.1-0.2-0.5-0.6-0.6-0.4-0.10.40.81.11.110.70.2-0.3-0.7-1-1

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 (19,4,5,8)
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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.