Sunday, March26, 2017 L-36.com


Marine Weather and Tides
Arnold, MD

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:56AMSunset 7:25PM Sunday March 26, 2017 7:13 AM EDT (11:13 UTC) Moonrise 5:16AMMoonset 4:58PM Illumination 1% 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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ANZ538 Patapsco River Including Baltimore Harbor- 642 Am Edt Sun Mar 26 2017
.small craft advisory in effect through this evening...
Today..E winds 15 kt with gusts to 20 kt. Waves 2 ft. A slight chance of rain with patchy drizzle this morning...then patchy drizzle with a chance of rain this afternoon.
Tonight..SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Patchy drizzle and rain likely.
Mon..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Mon night..S winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Tue..S winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely.
Tue night..NW winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft. A chance of showers.
Wed..N winds 5 to 10 kt. Waves 1 ft.
Thu..N winds 5 to 10 kt...becoming e. Waves 1 ft. A chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 642 Am Edt Sun Mar 26 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will drop south into the mid-atlantic tonight before returning north as a warm front Monday. A cold front is expected to cross the chesapeake bay region Tuesday night. Small craft advisories are possible Tuesday night and Wednesday behind the cold front.

7 Day Forecast for Marine Location Near Arnold, MD
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location: 39.03, -76.53     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 260757
afdlwx
area forecast discussion
national weather service baltimore md/washington dc
357 am edt Sun mar 26 2017

Synopsis
A cold front is dropping into the mid atlantic and will stall
over the area today. This will move back to the north as a warm
front Monday. Another cold front will cross the area late
Tuesday. High pressure will build over the region Thursday.

Near term /today/
As of 3am, a 1036mb surface high pressure is centered over north-
central quebec, 1027mb surface high pressure is centered over
bermuda, and 1008mb surface low pressure is centered near the border
of ia/mo/il. The low is weakening/filling under an upper trough over
eastern canada. The canadian high pressure will shift southeast
across maine through today. Influence of the canadian high is
already felt with a backdoor cold front moving through the area. It
has pushed through kcbe, kokv, and kezf in the past hour (and klwx
radar depicts the front moving from fauquier to culpeper county).

South of this front is southerly flow and warmer air from the
bermuda high.

The front is expected to cross all of the CWA today except maybe
southern nelson county. Mid-level clouds currently across the area
will thicken, lower and eventually produce rain and drizzle. The 00z
gfs depicts drizzle across the area before sunrise. Cloud ceilings
are starting to lower on the eastern shore with light showers
developing south of atlantic city over the past hour. Maintained a
forecast of patchy drizzle starting at 10am east from the blue
ridge. Pops remain low given the shallow saturated layer. However,
the occluded front from the midwest low crosses the western half of
the CWA this afternoon, so likely rain is out there through this
evening.

Whether the occluded front will be enough to break the cad wedge
tonight remains a key question. 00z consensus shifts the wind to the
south across the area tonight. However, models often erode cad
wedges too quickly, particularly overnight. So, there is low
confidence in temperatures Monday particularly in nern zones/in the
baltimore metro where low clouds may hold on well into the day.

Where wind does shift south, temperatures Monday look to rise well
into 70s.

Short term /tonight through Tuesday night/
A second low currently along the co/nm border will reach the midwest
late Monday before tracking across the northern mid-atlantic Tuesday
per 00z ecmwf/gfs. Continued moist southwesterly flow warrants high
chance pops with slight chance for thunder for the lwx CWA Monday.

Better chance for thunderstorms looks to be Tuesday on the south
side of the low crossing the region.

The cold front trailing this low enters the area Tuesday night
bringing in a brief stretch of quiet weather under high
pressure.

Long term /Wednesday through Saturday/
The first part of the forecast will be dominated by an induced
upper ridge over the mid atlantic in-between low pressure east
of nova scotia and a developing low across the central us. The
middle part of the week will be dry. Highs Wednesday in the 60s.

Lows Wednesday night 35-40. Thursday should see quite a bit of
sunshine with highs in the lower 60s.

Conditions will deteriorate Thursday night as the aforementioned
low tracks into missouri to near lake erie Friday. The
attendant warm front will hang south of the mid atlantic through
Friday. This will bring cooler temperatures to the region,
cloudy skies, and likely pops.

Low pressure may develop along the virginia coast Friday night
keeping the forecast area on the cloudy and wet side through
Saturday.

Aviation /07z Sunday through Thursday/
Onshore flow across the area generally 10 to 15 knots through
tonight. Drizzle and ifr conds expected to develop through the
daylight hours today with ceilings slow to lift tonight.

Southwesterly flow from low pressure to the west/north Monday and
Tuesday brings rain showers and thunderstorms to the dc metros
with the better thunder threat Tuesday afternoon.

Vfr conditions wedensday and Thursday. Clouds will thicken
Thursday nght.

Marine
Onshore flow 15 to 20 knots continues through tonight before
shifting south Monday.

Generally sub-sca swly flow prevails Monday and Tuesday with thunder
chances Tuesday. Cold front crosses the area Tuesday night with sca
likely across the area in nwly flow.

High pressure will build into the waters for midweek. No
problems expected on the waters Wednesday/Thursday.

Lwx watches/warnings/advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 9 pm edt this evening for
anz530>532-535-538>540.

Small craft advisory until 9 pm edt this evening for anz533-
536-541-542.

Products... Baj/woody!


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
APAM2 - 8575512 - Annapolis, MD 4 mi44 min 47°F 1025.9 hPa
CPVM2 8 mi44 min 47°F 43°F
TPLM2 - Thomas Point, MD 10 mi74 min E 18 G 19 46°F 45°F43°F
FSNM2 13 mi44 min ENE 15 G 17 45°F 1026.2 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 13 mi44 min ENE 12 G 13 45°F 1026.7 hPa
BLTM2 - 8574680 - Baltimore, MD 17 mi44 min E 9.9 G 13 46°F 47°F1026.5 hPa
BSLM2 - Chesapeake Bay, MD 20 mi104 min ENE 5.1 48°F 1025 hPa42°F
TCBM2 - 8573364 - Tolchester Beach, MD 20 mi44 min ENE 5.1 G 8.9 45°F 47°F1027 hPa
WASD2 - 8594900 - Washington, DC 28 mi44 min E 2.9 G 8 49°F 48°F1025.4 hPa
44062 - Gooses Reef, MD 33 mi34 min ESE 12 G 16 46°F 1026.2 hPa
CA2 - 8571892 - Cambridge, MD 40 mi44 min ENE 17 G 22 46°F 48°F1025 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 44 mi44 min ESE 9.9 G 12 47°F 1026.1 hPa
SLIM2 - 8577330 - Solomons Island, MD 49 mi44 min ENE 8 G 12 47°F 47°F

Wind History for Francis Scott Key Bridge NE Tower, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD4 mi20 minE 1110.00 miOvercast48°F43°F83%1026.6 hPa
Bay Bridge Field, MD11 mi39 minENE 11 G 157.00 miOvercast with Haze46°F41°F82%1026.4 hPa
Fort Meade / Tipton, MD13 mi35 minENE 510.00 miOvercast45°F37°F76%1027.1 hPa
Baltimore, Baltimore-Washington International Airport, MD13 mi20 minENE 139.00 miOvercast46°F39°F79%1026.4 hPa
Baltimore, Inner Harbor, MD18 mi80 minno data mi47°F37°F71%1026.7 hPa
College Park Airport, MD21 mi33 minE 810.00 miOvercast46°F41°F82%1026.1 hPa
Baltimore / Martin, MD22 mi24 minENE 910.00 miOvercast46°F42°F87%1027.8 hPa
Camp Springs / Andrews Air Force Base, MD23 mi76 minENE 1210.00 miOvercast47°F42°F83%1025.3 hPa

Wind History from NAK (wind in knots)
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Last 24hrW6W8
G15
W65SE9SE8SE13SE9SE9SE7E7CalmSE4E3E14E8E7E9E8
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1 day agoSW9S5S8S14
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5SE4SE4SE34SW7SW5SW5SW4CalmCalmCalm
2 days agoN5N10NE6N5SE8SE10SE9SE11SE10SE10SE10S7S6S6SE7S7S5S10S8S8S6S8S8S9

Tide / Current Tables for Brewer Point, Maryland
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Brewer Point
Click for Map
Sun -- 04:55 AM EDT     0.87 feet High Tide
Sun -- 06:15 AM EDT     Moonrise
Sun -- 06:59 AM EDT     Sunrise
Sun -- 11:29 AM EDT     0.01 feet Low Tide
Sun -- 05:31 PM EDT     0.92 feet High Tide
Sun -- 05:57 PM EDT     Moonset
Sun -- 07:24 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.30.50.70.80.90.80.70.50.30.1000.10.30.60.80.90.90.80.60.50.30.2

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Sun -- 01:58 AM EDT     0.00 knots Slack
Sun -- 04:56 AM EDT     0.77 knots Max Flood
Sun -- 06:15 AM EDT     Moonrise
Sun -- 06:59 AM EDT     Sunrise
Sun -- 07:56 AM EDT     -0.00 knots Slack
Sun -- 10:59 AM EDT     -0.79 knots Max Ebb
Sun -- 01:59 PM EDT     0.00 knots Slack
Sun -- 05:09 PM EDT     0.88 knots Max Flood
Sun -- 05:56 PM EDT     Moonset
Sun -- 07:23 PM EDT     Sunset
Sun -- 08:16 PM EDT     -0.00 knots Slack
Sun -- 11:24 PM EDT     -0.89 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.400.40.70.80.70.4-0-0.4-0.7-0.8-0.7-0.400.40.70.90.80.50.1-0.3-0.7-0.9

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 (7,2,3,4)
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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.