Wednesday, April26, 2017 L-36.com


Marine Weather and Tides
Annapolis, 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 6:11AMSunset 7:55PM Wednesday April 26, 2017 7:24 PM EDT (23:24 UTC) Moonrise 5:37AMMoonset 7:14PM Illumination 1% Phase: New Moon; Moon at 1 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- 431 Pm Edt Wed Apr 26 2017
Rest of this afternoon..SE winds 5 kt. Waves less than 1 ft.
Tonight..SE winds around 5 kt. Waves flat. Patchy fog. Vsby 1 to 3 nm.
Thu..S winds 10 to 15 kt. Waves 1 ft. Patchy fog. Vsby 1 to 3 nm.
Thu night..S winds 10 to 15 kt. Waves 2 ft.
Fri..SW winds 5 to 10 kt. Waves 1 ft.
Fri night..S winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt...becoming nw after midnight. Waves 1 ft. A chance of showers and tstms...then scattered showers after midnight.
Sun..SE winds 5 to 10 kt. Waves 1 to 2 ft. Scattered showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 431 Pm Edt Wed Apr 26 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure off the delmarva will slowly move northeast. A cold front will approach from the west Thursday night before dissipating on Friday. A small craft advisory may be needed for portions of the waters Thursday afternoon into Thursday night.

7 Day Forecast for Marine Location Near Annapolis, MD
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location: 38.97, -76.49     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 261835
afdlwx
area forecast discussion
national weather service baltimore md/washington dc
235 pm edt Wed apr 26 2017

Synopsis
Low pressure east of new jersey will slowly move away from the
coast. A cold front will approach the region and weaken over the
area Thursday night. A backdoor front may slide into the area
late Saturday into Sunday. A cold front will pass through the
region early next week.

Near term /tonight/
The atmosphere over the mid atlantic is moving in slow motion
courtesy of a vertically stacked low east of nj. As discussed
this morning clouds across northern va/md/dc have barely
changed height/thickness today. This is trudging slowly to the
northeast... And clouds should be thinning tonight in the
northeast part of the forecast area... While skies should be
clear in the central shenandoah valley from early evening on.

The clearing skies should lead to good radiational conditions
which in turn will lead to fog formation late tonight.

Lows in the 50s except lower 60s in the cities.

Short term /Thursday through Friday night/
After the low pressure area finally departs and moves east of
cape cod Thursday skies should finally return to a mostly sunny
condition - after some early morning fog. Highs in the lower to
mid 80s.

But the respite from clouds will be short. A cold front will be
pushing into the mid atlantic Thursday night bringing the
chance of showers/isolated thunderstorms. This will not be
coming through at a prime time for severe weather. Coverage will
be spotty, so one place could pick up a few tenths of an inch of
rain while ten miles away stays dry.

The front is expected to be east of the region by Friday
morning. Skies should improve, highs again in the lower to mid
80s.

Long term /Saturday through Wednesday/
High pressure will be to our southeast with a front along the mason-
dixon line Saturday and Saturday night. Temperatures will remain
warm with a chance of showers or a thunderstorm mainly across the
northern half of our region.

By Sunday into Sunday night, the high to the southeast will break
down with the front sliding across the d.C. Area during the day
before meandering northward as a warm front Sunday night. The chance
for showers and thunderstorms will become more prominant, mainly
Sunday with the front nearby and before the warm surge.

An increasing southerly wind will usher in warmer and more humid air
to help fuel showers and thunderstorms Monday into Monday evening. A
strong cold front should works its way eastward across the region
Monday night.

Gusty westerly winds and drier and cooler air will filter into the
region Tuesday and Tuesday night behind the cold front as high
pressure builds in from the west.

High pressure moves offshore Wednesday, while keeping conditions
dry. A return flow will be an indication that a new warm front will
try to push across the region later Wednesday.

Aviation /18z Wednesday through Monday/
With the exception of cho all ceilings at airports in our area
remain at MVFR levels. Improvement should continue into the
evening hours, at which time all sites should return toVFR. Fog
development is possible overnight. For now have taken all sites
down to 2-3 miles around 09z-13z. Later shifts can adjust
up/down depending upon latest guidance/obs.

Vfr after about 13z Thursday. Showers/isolated thunderstorms
possible Thursday night as a cold front moves through.VFR again
Friday.

MVFR to ifr conditions expected Saturday through Sunday with showers
and thunderstorms in the area near mrb, iad, mtn and bwi terminals.

Vfr conditions elsewhere. MVFR to perhapsVFR conditions Sunday
night. Winds southwest around 5 knots Saturday, becoming light and
variable Saturday night, then east 5 to 10 knots Sunday, and
southerly 5 to 10 knots Sunday night.

Marine
Winds expected to remain below SCA values through tonight. On a
more southerly flow Thursday will keep winds capped at 15 knots.

Showers/isolated thunderstorms will be possible Thursday night.

No marine hazards expected Saturday through Sunday night. Winds
southwest 5 to 10 knots Saturday, becoming light and variable
Saturday night, then east 10 knots Sunday, and southeast 10 knots
Sunday night.

Tides/coastal flooding
Water levels have decreased slightly with northwest winds today but
remain elevated, especially from the potomac river southward.

Straits point will be near if not exceeding minor flood stage for
the next two high tide cycles. Guidance shows steady to decreasing
waters for the remainder of the week, but am a bit skeptical about
this outcome considering winds will become south or southwesterly
through that time. Thus minor flooding at sensitive sites will need
to continue to be monitored. In terms of the current guidance,
Friday morning will be the next targeted opportunity.

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

Md... Coastal flood advisory from 1 am to 6 am edt Thursday for
mdz017.

Va... None.

Wv... None.

Marine... None.

Products... Woody!/klw/ads


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
APAM2 - 8575512 - Annapolis, MD 1 mi54 min 65°F 1008.4 hPa
44063 - Annapolis 2 mi44 min SSW 3.9 G 5.8 60°F 1008.9 hPa
CPVM2 6 mi54 min 62°F 60°F
TPLM2 - Thomas Point, MD 6 mi84 min S 5.1 G 5.1 60°F 56°F58°F
44043 - Patapsco, MD 14 mi44 min SSE 5.8 G 5.8 60°F 1009.4 hPa
BSLM2 - Chesapeake Bay, MD 17 mi114 min ENE 5.1 65°F 1008 hPa56°F
FSNM2 17 mi54 min ESE 8 G 8.9 62°F 1008.4 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 17 mi54 min ESE 7 G 8 62°F 1008.6 hPa
BLTM2 - 8574680 - Baltimore, MD 21 mi54 min S 4.1 G 7 63°F 58°F1008.2 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 21 mi54 min Calm G 1 64°F 57°F1008.9 hPa
WASD2 - 8594900 - Washington, DC 29 mi54 min NE 1.9 G 6 71°F 64°F1008 hPa
44062 - Gooses Reef, MD 29 mi44 min Calm G 0 63°F 1009.8 hPa
CA2 - 8571892 - Cambridge, MD 35 mi54 min 64°F 62°F
COVM2 - 8577018 - Cove Point LNG Pier, MD 40 mi54 min S 1 G 1.9 62°F 1009.5 hPa
44057 - Susquehanna, MD 45 mi44 min SSW 3.9 G 3.9 60°F 1008.4 hPa
SLIM2 - 8577330 - Solomons Island, MD 45 mi54 min E 5.1 G 5.1 62°F 60°F

Wind History for Francis Scott Key Bridge NE Tower, MD
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NE10
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NE15
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SE3
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD1 mi90 minS 410.00 miOvercast65°F59°F81%1008.7 hPa
Bay Bridge Field, MD8 mi49 minSE 35.00 miOvercast with Haze64°F59°F83%1008.8 hPa
Fort Meade / Tipton, MD17 mi45 minESE 310.00 miOvercast64°F57°F78%1009.8 hPa
Baltimore, Baltimore-Washington International Airport, MD18 mi30 minN 010.00 miOvercast66°F59°F78%1008.8 hPa
Camp Springs / Andrews Air Force Base, MD22 mi86 minNE 410.00 miOvercast67°F57°F71%1008.7 hPa
Baltimore, Inner Harbor, MD22 mi90 minno data mi67°F57°F71%1008.3 hPa
College Park Airport, MD23 mi43 minN 010.00 miPartly Cloudy67°F56°F67%1008.8 hPa

Wind History from BWI (wind in knots)
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Last 24hrNE9NE10NE12NE7N6N6N4N4NW4NW6N6NW5NW6NW635N4N53CalmCalmCalmCalmCalm
1 day agoNE16
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NE11NE8NE8E11NE11NE9NE9NE12NE15NE11NE13NE17
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2 days agoCalmCalmCalmCalmE6E5CalmE4E6NE6NE7NE5NE8NE10NE11NE12E12NE13E13NE10--E13NE14E16

Tide / Current Tables for Annapolis (US Naval Academy), Severn River, Maryland
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Annapolis (US Naval Academy)
Click for Map
Wed -- 05:48 AM EDT     1.65 feet High Tide
Wed -- 06:13 AM EDT     Sunrise
Wed -- 06:37 AM EDT     Moonrise
Wed -- 08:18 AM EDT     New Moon
Wed -- 12:18 PM EDT     0.24 feet Low Tide
Wed -- 05:57 PM EDT     1.15 feet High Tide
Wed -- 07:54 PM EDT     Sunset
Wed -- 08:13 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.40.71.11.41.61.61.51.310.70.40.20.30.50.70.91.11.11.10.90.60.40.2

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Wed -- 02:12 AM EDT     0.00 knots Slack
Wed -- 05:40 AM EDT     1.16 knots Max Flood
Wed -- 06:13 AM EDT     Sunrise
Wed -- 06:36 AM EDT     Moonrise
Wed -- 08:18 AM EDT     New Moon
Wed -- 09:01 AM EDT     -0.00 knots Slack
Wed -- 12:13 PM EDT     -1.08 knots Max Ebb
Wed -- 03:40 PM EDT     0.00 knots Slack
Wed -- 06:19 PM EDT     0.69 knots Max Flood
Wed -- 07:53 PM EDT     Sunset
Wed -- 08:13 PM EDT     Moonset
Wed -- 09:03 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.8-0.5-0.10.40.81.11.10.90.50-0.5-0.9-1.1-1-0.7-0.30.10.50.70.60.40-0.4-0.7

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.