Thursday, December12, 2019
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Marine Weather and Tides
Long Beach, MD

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:14AMSunset 4:48PM Thursday December 12, 2019 6:30 PM EST (23:30 UTC) Moonrise 5:22PMMoonset 7:30AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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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ANZ533 Chesapeake Bay From North Beach To Drum Point- 340 Pm Est Thu Dec 12 2019
Rest of this afternoon..E winds 5 kt. Waves less than 1 ft.
Tonight..NE winds 5 to 10 kt. Waves 1 ft.
Fri..NE winds 5 kt. Waves less than 1 ft. Rain likely.
Fri night..E winds 5 to 10 kt. Waves 1 ft. Rain.
Sat..SW winds 5 to 10 kt. Waves 1 ft. Rain likely.
Sat night..W winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance of showers.
Sun..W winds 10 to 15 kt...becoming N 5 to 10 kt after midnight. Waves 1 to 2 ft.
Mon..SE winds 5 to 10 kt. Waves 1 to 2 ft. Rain or snow likely in the morning, then rain.
ANZ500 340 Pm Est Thu Dec 12 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over the region will shift offshore through this tonight. A low pressure system developing over the northern gulf of mexico will move northeastward toward the region Friday into Saturday. Small craft advisories may be needed Saturday through Sunday morning.


7 Day Forecast for Marine Location Near Long Beach, MD
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location: 38.47, -76.47     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 121942 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 242 PM EST Thu Dec 12 2019

SYNOPSIS. High pressure will slide offshore tonight. Low pressure will start developing along the Gulf Coast tonight and then head northward up the East Coast Friday and Saturday. High pressure will return briefly on Sunday before another system potentially affects the region Monday and Monday night. Cold high pressure will then follow for the middle of next week.

NEAR TERM /THROUGH FRIDAY/. A strong area of high pressure remains centered just north of the area today, funneling in some very chilly air. This has resulted in mostly clear skies, with temperatures only in the mid 30s thus far today.

Mostly clear skies expected to continue this evening into tonight, as high pressure begins to slide towards the east. With calm winds also expected, could be a good setup for some radiational cooling. Low pressure will be developing to our southwest and moving generally northeast through the night. As a result, some clouds will begin to build into the region late tonight.

Precipitation associated with this system will be moving into the I-64 corridor early in the morning hours, perhaps between 3-5 AM. This will start as freezing rain, as temperatures remain below freezing due to a wedge of cold air remaining in place for much of the region. The onset of precipitation may be on the lighter side, as most guidance still moves the primary axis of precipitation by 5-7 AM into that region. Freezing rain will gradually spread north and east through the morning, primarily along/west of the Blue Ridge along the I-81 corridor. Areas along and just west of the I-95 corridor could see some brief freezing rain/drizzle in the morning if precipitation onset ends up being earlier than currently anticipated, or if cold air hangs on a little longer. Left that area out of the Winter Weather Advisory at this point due to the uncertainty of how far east freezing rain occurs.

Freezing rain will change over to all rain for much of the area by early to mid afternoon, as warm air should finally win out. However, northwest portions of the CWA could hang onto the cold air a little bit longer, meaning a more prolonged period of freezing rain. Have this reflected in ice accumulation forecast.

Generally expecting less than a tenth of an inch of ice accretion in the Winter Weather Advisory area. Southwestern portions of the CWA up through the Shenandoah Valley and into western Maryland could see higher amounts (around a tenth of an inch or so).

Came down a little on high temperatures along/west of the Blue Ridge, keeping temps in the mid to upper 30s, with areas along/east of I-95 possibly reaching the low 40s.

SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/. Low pressure will traverse the area Friday night. By this time, most of the area should be above freezing, with all rain expected. Rain could be moderate to heavy at times, with generally an inch to an inch and a half expected, with isolated higher amounts possible along the ridges. Given the relatively dry period lately, not anticipating flood issues at this time.

Low pressure will slide to the northeast on Saturday, leaving showers behind. Cold advection behind the system will begin to bring upslope showers to the Allegheny Front. These will changeover to snow quickly into the late afternoon/early evening as colder air pushes in. Only light accumulations are expected, with no winter weather advisories for snow currently anticipated. Further east, Saturday afternoon and evening will be slowly drying out, with relatively mild temps near 50 in the afternoon dropping into the 30s at night.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. High pressure will briefly build over our region on Sunday behind a exiting coastal low system to the northeast. A westerly flow will form that may lead to some upslope snow showers Sunday morning along the western slopes of the Allegheny Mountain range. Temperatures will be near average during the day in the low to mid 40w with overnight lows in the 30s Sunday night.

A warm front is forecast to lift up through our area early on Monday. A weak high pressure looks to create a cold air damming situation on the eastern side of the Appalachians. Models starting to agree that a near surface layer of near to below freezing temperatures will be in place for a period Sunday overnight through Monday afternoon. As the precipitation shield associated with the warm front moves through our region, wintry precipitation will be possible on Monday. Models have consistent shown a above freezing layer at the mid-levels which would be an ideal setup for freezing rain but it remains uncertain at this time on how widespread wintry precipitation will become. Monday continues to be a concerning setup especially with decent agreement on some sort of cold damming situation. As the surface cold front lifts through our area, winds will become more southerly leading to a warm up late Monday and into early Tuesday. This suggest a changeover to all rain. The timing of this warm air moving into our region will need to continue to monitor to determine how much wintry precipitation will be possible.

Showers could linger into early Tuesday as the frontal system lifts out of our region. Most precipitation is forecast to be fully out of our area by Tuesday afternoon. High pressure will then build back into our region Tuesday afternoon through Thursday next week.

AVIATION /19Z THURSDAY THROUGH TUESDAY/. VFR conditions are expected through this evening and the early part of the overnight hours, with light winds generally out of the northeast. Lowering CIGs and RA/FZRA will become a concern early Friday morning. FZRA is likely at CHO by 11z or so and at MRB by around 14z. Much less (but still some) risk IAD. Not particularly concerned at DCA/BWI/MTN for FZRA given later arrival of precip and warming easterly flow. Low CIGs and VSBY likely Friday night with rain. Improving to MVFR/VFR on Saturday as low lifts north and rain ends, though scattered showers may linger.

Weak high pressure over our region will lead to mainly VFR conditions but with a westerly flow some midlevel cloud decks will be possible on Sunday.

A warm front will lift up through all terminals. Precipitation will be likely with some of it potentially falling as wintry precip likely in the form of freezing rain. SubVFR conditions will be possible.

MARINE. High pressure will slide east as low pressure moves up from the south tonight through Friday night, but not yet particularly concerned about SCA issues given stable air mass in place. SCA could become an issue as low pressure pulls away Saturday into Sunday.

A coastal low will exit our region on Sunday but some lingering strong winds could lead to the need for Small Craft Advisories on Sunday. Another system will move through our region on Monday which could lead to the need for further Small Craft Advisories.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . Winter Weather Advisory from 9 AM to 3 PM EST Friday for MDZ003-004. Winter Weather Advisory from 9 AM to 6 PM EST Friday for MDZ501-502. VA . Winter Weather Advisory from 4 AM to 3 PM EST Friday for VAZ025-026-036>038-503-504-508. Winter Weather Advisory from 9 AM to 3 PM EST Friday for VAZ505. Winter Weather Advisory from 7 AM to 3 PM EST Friday for VAZ027>031-039-040-501-507. WV . Winter Weather Advisory from 4 AM to 3 PM EST Friday for WVZ505-506. Winter Weather Advisory from 9 AM to 3 PM EST Friday for WVZ051>053. Winter Weather Advisory from 7 AM to 3 PM EST Friday for WVZ050-055-501-502. Winter Weather Advisory from 7 AM to 6 PM EST Friday for WVZ503-504. MARINE . None.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44062 - Gooses Reef, MD 7 mi30 min Calm G 0 35°F 1039.3 hPa
SLIM2 - 8577330 - Solomons Island, MD 10 mi42 min N 2.9 G 2.9 36°F 47°F1037.9 hPa
CA2 - 8571892 - Cambridge, MD 22 mi48 min S 1.9 G 2.9 37°F 44°F1038.2 hPa
PPTM2 - 8578240 - Piney Point, MD 23 mi42 min NE 4.1 G 5.1
BSLM2 - Chesapeake Bay, MD 25 mi120 min SE 5.1 36°F 1038 hPa18°F
BISM2 - 8571421 - Bishops Head, MD 29 mi48 min N 5.1 G 5.1 35°F 42°F1038.4 hPa
TPLM2 - Thomas Point, MD 30 mi30 min S 1.9 G 2.9 35°F 45°F1039.5 hPa (-0.5)19°F
44042 - Potomac, MD 31 mi30 min 35°F 47°F1038.1 hPa
NCDV2 32 mi48 min SE 8 G 8.9 38°F 47°F1037.4 hPa
LWTV2 - 8635750 - Lewisetta, VA 33 mi48 min E 4.1 G 5.1 37°F 43°F1038 hPa
44063 - Annapolis 34 mi30 min WSW 1.9 G 1.9 35°F 44°F1039.1 hPa
APAM2 - 8575512 - Annapolis, MD 35 mi42 min 35°F 1038.1 hPa
CPVM2 37 mi48 min 36°F
WASD2 - 8594900 - Washington, DC 40 mi42 min ESE 2.9 G 8 36°F 44°F1038.7 hPa

Wind History for Cove Point LNG Pier, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD12 mi2.9 hrsESE 3 miFair36°F15°F44%1039.3 hPa
Patuxent River, Naval Air Station, MD13 mi3.6 hrsSE 510.00 miPartly Cloudy37°F19°F48%1039.1 hPa
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD23 mi3.6 hrsE 510.00 miFair41°F19°F41%1038.7 hPa
Cambridge-Dorchester Airport, MD24 mi2.9 hrsN 010.00 miFair39°F17°F42%1038.9 hPa

Link to 5 minute data for KNHK

Wind History from NHK (wind in knots)
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Tide / Current Tables for Long Beach, Chesapeake Bay, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Broomes Island, 0.4 mile south of, Maryland Current
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Broomes Island
Click for MapFlood direction 290 true
Ebb direction 110 true

Thu -- 12:14 AM EST     Full Moon
Thu -- 12:15 AM EST     0.21 knots Max Flood
Thu -- 02:54 AM EST     -0.00 knots Slack
Thu -- 05:46 AM EST     -0.33 knots Max Ebb
Thu -- 07:13 AM EST     Sunrise
Thu -- 07:30 AM EST     Moonset
Thu -- 08:18 AM EST     0.00 knots Slack
Thu -- 11:56 AM EST     0.60 knots Max Flood
Thu -- 03:42 PM EST     -0.00 knots Slack
Thu -- 04:45 PM EST     Sunset
Thu -- 05:22 PM EST     Moonrise
Thu -- 07:05 PM EST     -0.66 knots Max Ebb
Thu -- 10:59 PM EST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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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 (18,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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