Sunday, December17, 2017 L-36.com


Marine Weather and Tides
Deale, 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 4:47PM Sunday December 17, 2017 8:48 AM EST (13:48 UTC) Moonrise 6:29AMMoonset 4:41PM Illumination 1% Phase: Waning Crescent; Moon at 29 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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ANZ532 Chesapeake Bay From Sandy Point To North Beach- 631 Am Est Sun Dec 17 2017
Today..E winds 5 kt. Waves flat. A slight chance of rain this afternoon.
Tonight..S winds 5 kt. Waves less than 1 ft.
Mon..W winds 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..E winds 5 kt. Waves less than 1 ft.
ANZ500 631 Am Est Sun Dec 17 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain south of the waters today. A backdoor cold front will reside just to our north today, migrating northward as a warm front this evening. High pressure will control the weather pattern through Tuesday before a cold front crosses overnight Tuesday. A small craft advisory is possible late Tuesday night into Wednesday.

7 Day Forecast for Marine Location Near Deale, MD
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location: 38.76, -76.53     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 170844
afdlwx
area forecast discussion
national weather service baltimore md washington dc
344 am est Sun dec 17 2017

Synopsis
A weak backdoor frontal boundary will hover near the area today,
lifting northward as a warm front tonight into Monday. An upper
level disturbance will approach the area from the southwest
later this afternoon and evening. A cold front is slated to
cross the region Tuesday evening with high pressure building
overhead for the remainder of the work week.

Near term through tonight
Mostly clear skies prevailing early this morning under calm
winds across the region. The clear skies have allowed
temperatures to radiate nicely with temperatures generally in
the 20s, and near the freezing mark in the city centers. A weak
frontal boundary resides across pa, bringing an increase in
cloud coverage over that region. This frontal boundary will
sneak slowly southward today, before lifting northward as a warm
front by this evening as a shortwave approaches the region from
the southwest.

High pressure off the southeast coast today will continue to
slowly drift eastward over the western atlantic, maintaining
generally light southerly winds across the area and near normal
temperatures in the mid to upper 40s. The aforementioned
shortwave that will approach from the southwest today will bring
an increase in cloud coverage by this afternoon, as well as an
increase in low level moisture. Model guidance in good agreement
with some showers developing across the area by this evening,
but they will remain light. Expecting liquid precipitation with
these showers as temperatures at the surface and aloft will
generally be above freezing. A few ice pellets could mix in over
our northern zones near the mason dixon and the allegheny
front, resulting in little to no impacts. Temperatures
overnight will fall in to the low to mid 30s.

Short term Monday through Tuesday night
Weak high pressure will build over the area on Monday with some
light showers possible along the allegheny front with minimal
accumulations expected. Overall dry conditions and moderating
temperatures expected for the region Monday and Monday night.

Highs on Monday will top out in the low to middle 50s and settle
down to in the upper 30s to near 40 degrees Monday night.

Another mild day on tap on Tuesday with highs approaching 60
degrees with a southwest flow. A surface trough and associated
cold front will cross the region overnight Tuesday, trending a
little later than previous guidance. Not much fanfare in the way
of precipitation as this front approaches, mainly upslope
rain snow shower across our far western mountains as winds turn
northwesterly in its wake. Temperatures Tuesday night will
remain above average from the middle 30s to near 40 degrees in
the cities.

Long term Wednesday through Saturday
Southern stream shortwave energy will be undercutting the forecast
area Wednesday into Wednesday night. Some timing and placement
discrepancies linger with respect to this wave, but the consensus
seems to be converging on a solution that keeps most of the forcing
south of the area... Which precludes the need to identify specific
precipitation type(s). A consensus approach suggests that lows will
be below freezing, but thermally that should occur after any precip
falls (if there were any). Will allow for a slight freezing chance
in the database to maintain a pinch of consistency, but latest
trends suggest this won't be a factor.

In the wake of this disturbance, believe that there will be a dry
period, as a ridge of high pressure builds from the north. That
should encompass at least Thursday and Thu night. Beyond that, the
problem becomes timing. A fairly well defined frontal system,
attendant to a relatively strong northern stream low, will arrive
by around Saturday. Potentially a warm front will be crossing first,
somewhere in the late Friday Friday night time frame. Temperatures
will be key in determining precip type... Particularly at night. Will
lean toward the warm side... Not just to simplify the weather
forecast, but also that is in line with the latest blended guidance.

Anticipate future runs will vary as guidance seeks a solution that
can be locked in.

Aviation 07z Sunday through Thursday
PredominateVFR conditions are expected across the terminals
through Monday night under a light wind flow regime. A weak
upper level disturbance may spark a few showers late Sunday
afternoon and evening, but at worse, only brief reductions in
vis CIGS expected along and north of mrb bwi mtn.VFR conditions
continue on Tuesday with a mostly dry cold front expected to
cross the terminals overnight Tuesday.

Vfr flight conditions anticipated wed-thu.

Marine
With high pressure in control over the southeastern u.S., light
winds will prevail across the waters through Monday night. A
cold front will approach from the west on Tuesday, increasing
winds out of the southwest, but expected to remain below sca
criteria. A cold front will push through the area overnight
Tuesday, increasing winds out of the northwest. SCA conditions
likely in the wake of the frontal passage.

Winds should remain below critical thresholds wed-thu. Northwest
flow will be decreasing wed. While the deterministic gust
forecast will be no higher than 15 kt, some guidance sources
suggest small craft advisories may extend into wed. As high
pressure builds thu, flow should become light.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Synopsis... Bkf
near term... Bkf
short term... Bkf
long term... Hts
aviation... Bkf hts
marine... Bkf hts


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BSLM2 - Chesapeake Bay, MD 10 mi139 min Calm 25°F 1025 hPa24°F
TPLM2 - Thomas Point, MD 11 mi49 min Calm G 1.9 38°F 43°F
44062 - Gooses Reef, MD 15 mi39 min WSW 1.9 G 1.9 42°F 1025.4 hPa
APAM2 - 8575512 - Annapolis, MD 16 mi49 min 36°F 1024.2 hPa (+1.1)
CPVM2 18 mi49 min 39°F 25°F
COVM2 - 8577018 - Cove Point LNG Pier, MD 26 mi49 min WSW 1.9 G 1.9 39°F 1025.5 hPa (+1.1)
WASD2 - 8594900 - Washington, DC 27 mi49 min WSW 1.9 G 2.9 32°F 39°F1025.2 hPa
CA2 - 8571892 - Cambridge, MD 28 mi49 min 32°F 39°F1025.7 hPa (+1.1)
SLIM2 - 8577330 - Solomons Island, MD 31 mi49 min NW 1.9 G 2.9 34°F 44°F1024.8 hPa (+1.3)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 32 mi49 min NNE 5.1 G 5.1 33°F 1024.8 hPa (+1.2)
FSNM2 32 mi49 min N 2.9 G 2.9 35°F 1024 hPa (+1.2)
BLTM2 - 8574680 - Baltimore, MD 35 mi49 min SE 1.9 G 2.9 34°F 44°F1024.4 hPa (+1.3)
TCBM2 - 8573364 - Tolchester Beach, MD 35 mi49 min ESE 1.9 G 2.9 30°F 37°F1025.1 hPa (+1.5)
NCDV2 41 mi49 min NNW 1 G 1 29°F 38°F1024 hPa (+0.9)
PPTM2 - 8578240 - Piney Point, MD 43 mi49 min E 1 G 1.9
BISM2 - 8571421 - Bishops Head, MD 45 mi49 min Calm G 4.1 37°F 35°F1025.2 hPa (+1.0)

Wind History for Cove Point LNG Pier, MD
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W9
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W12
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N28
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD15 mi55 minN 010.00 miFair32°F28°F85%1024.7 hPa
Bay Bridge Field, MD18 mi64 minno data7.00 miFair30°F26°F86%1024.7 hPa
Camp Springs / Andrews Air Force Base, MD19 mi53 minN 010.00 miFair28°F23°F84%1025.4 hPa

Wind History from ADW (wind in knots)
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SW9SW11SW7S5S5S6SW5SW4CalmCalmCalmCalmSW3CalmCalmCalmCalmCalm
1 day agoNE3CalmCalmCalmCalmN6CalmCalmCalmCalmCalmCalmW4SW5SW4SW5SW5SW5SW4SW6SW7SW6SW7SW5
2 days agoW11
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NW14NW18
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N11NW6NW11N8N6N5CalmN5N8NE6NE3NE4NE3E5E4E3E4NE5

Tide / Current Tables for Fairhaven, Herring Bay, Maryland
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Fairhaven
Click for Map
Sun -- 02:37 AM EST     0.59 feet High Tide
Sun -- 06:29 AM EST     Moonrise
Sun -- 07:18 AM EST     Sunrise
Sun -- 08:35 AM EST     -0.21 feet Low Tide
Sun -- 03:35 PM EST     1.06 feet High Tide
Sun -- 04:41 PM EST     Moonset
Sun -- 04:46 PM EST     Sunset
Sun -- 10:31 PM EST     0.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.50.60.60.50.30.1-0.1-0.2-0.2-0.10.10.40.70.911.110.80.60.40.20.10.1

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Sun -- 02:23 AM EST     0.00 knots Slack
Sun -- 04:46 AM EST     0.49 knots Max Flood
Sun -- 06:29 AM EST     Moonrise
Sun -- 07:18 AM EST     Sunrise
Sun -- 07:19 AM EST     -0.00 knots Slack
Sun -- 10:13 AM EST     -0.60 knots Max Ebb
Sun -- 12:50 PM EST     0.00 knots Slack
Sun -- 04:35 PM EST     1.14 knots Max Flood
Sun -- 04:40 PM EST     Moonset
Sun -- 04:44 PM EST     Sunset
Sun -- 08:03 PM EST     -0.00 knots Slack
Sun -- 11:23 PM EST     -1.05 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.9-0.5-0.10.20.40.50.40.1-0.2-0.5-0.6-0.5-0.30.10.50.91.11.10.90.50-0.5-0.8-1

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 (8,2,3,4)
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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.