Monday, May21, 2018 L-36.com


Marine Weather and Tides
Galesville, MD

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:46AMSunset 8:19PM Monday May 21, 2018 10:05 PM EDT (02:05 UTC) Moonrise 11:09AMMoonset 12:27AM Illumination 47% Phase: First Quarter Moon; Moon at 7 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- 732 Pm Edt Mon May 21 2018
Tonight..SE winds 5 kt. Waves less than 1 ft. A slight chance of showers and tstms after midnight.
Tue..S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Patchy fog.
Tue night..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed..NW winds 5 to 10 kt. Waves 1 ft.
Wed night..NW winds 5 kt. Waves less than 1 ft.
Thu..N winds 5 kt. Waves less than 1 ft.
Thu night..S winds 5 kt. Waves less than 1 ft.
Fri..SW winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft. A chance of tstms. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 732 Pm Edt Mon May 21 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front stalled to the south and west of the waters tonight will slowly return north as a warm front Tuesday. A cold front will pass through the waters Wednesday and high pressure will build overhead Thursday. High pressure will move offshore Friday through the weekend. Small craft advisory conditions are possible Wednesday.

7 Day Forecast for Marine Location Near Galesville, MD
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location: 38.85, -76.53     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 220104
afdlwx
area forecast discussion
national weather service baltimore md washington dc
904 pm edt Mon may 21 2018

Synopsis
A front will remain over the carolinas into the appalachian
mountains today through tonight. The front will return north as
a warm front on Tuesday with a cold front expected to pass
through the area on Wednesday. Weak high pressure will build
over the area for the second half of the week.

Near term until 6 am Tuesday morning
Showers and thunderstorms in advance of a (very) slow moving
warm front have been rather persistent over the highlands of
eastern west virginia and west-central virginia the last few
hours. Low-level warm moist advection and residual instability
should allow these storms to continue until around midnight
before gradually weakening. Isolated instances of flooding are
possible given high pwat air and slow storm motion.

Precipitation should gradually weaken and become less widespread
as it pushes east overnight. Still, scattered showers and a
thunderstorm or two are possible into Tuesday morning ahead of
the slowly advancing warm front. Patchy fog is expected as well
but widespread dense fog seems unlikely with scattered to broken
cloud cover moving overhead tonight.

Short term 6 am Tuesday morning through Wednesday night
After some morning low clouds and patchy fog, the warm front
will lift northward, although the extent of which is still in
question. This should place much of the region in the warm
sector by mid-afternoon Tuesday, especially dc southward.

Therefore, instability in this region will increase with mlcape
values progged to reach 1000-1500 j kg. While shear will be
modest, on the order of 25-30 knots, this combination will
likely be enough to support a few strong to isolated severe
thunderstorms, and the region has been placed in a marginal
risk for severe thunderstorms. Synoptically, an area of low
pressure will be moving into the eastern great lakes, with a
cold front trailing into the ohio valley. Across the mid-
atlantic states, a lee trough is expected to develop, and will
likely serve as the focus for thunderstorm development Tuesday
afternoon, with convection then moving eastward. An area from
the blue ridge east and dc south currently appears to have the
highest chances of seeing stronger thunderstorms.

In addition, with precipitable water values in excess of 1.5"
and saturated soils, the risk of some isolated incidents of
flooding will be increased.

High temperatures Tuesday will range from the mid 70s to low
80s.

The cold front will then approach the area Tuesday night, and
while convection associated with the frontal boundary should be
weakening, some may make it into western central md and eastern
wv late Tuesday evening. Lows Tuesday night in the 60s.

The front should complete its crossing the first half of
Wednesday and settle across north carolina Wednesday night. A
few lingering showers and isolated thunderstorms may be around
Wednesday, although coverage should be much less than Tuesday.

Dry conditions area-wide are then expected Wednesday night.

Highs Wednesday will range from 80-85f with lows in the 50s 60s.

Long term Thursday through Monday
A high pressure system will shift eastward into our region from the
great lakes region on Wednesday. Winds look to remain mostly
light and variable. 850 and 700 mb humidity levels look to
remain fairly low which will lead to mostly clear skies Thursday
through Friday. The high will shift eastward off the eastern
seaboard. A south to southwesterly flow will form leading to
weak warm air advection developing. Temperatures will trend
upward moving into the weekend. High temperatures on Thursday
will be in the upper 70s to mid 80s and will slowly trend up
into mid to upper 80s on Friday.

On Saturday, a strong south to southwesterly flow will be in place
over the region due to a high pressure sitting off the eastern sea
board. Temperatures will rise up into the upper 80s to lower 90s.

Rising temperatures and influx of tropical moisture from the gulf
will lead to a chance for some shower and thunderstorm development.

Sunday, the interaction of tropical moisture and higher temperatures
along with a approaching cold front from the west will lead to
increased chances for precipitation and thunderstorms.

Aviation 01z Tuesday through Saturday
A warm front gradually approaching from southern virginia will
lead to the development of lower stratus with MVFR ifr ceilings
likely by early Tuesday morning. There is also the potential
for some patchy fog br.

The front will then move northward Tuesday morning before a
weak cold front passes through Wednesday. Conditions will
gradually improve during the day before scattered showers and
thunderstorms develop Tuesday afternoon and evening. These
showers storms will then wane Tuesday night, although chances
will linger into Wednesday.

Light winds and mostly clear skies on Thursday will lead toVFR
conditions. Friday, a weak southerly flow forms butVFR
conditions are expected.

Marine
A few gusts to around 20 knots have been observed early this
evening but will diminish with the loss of mixing. A front will
then approach the waters tonight from southern virginia and
cross the region Tuesday, before a cold front passes through
Wednesday. Showers and thunderstorms are likely Tuesday,
especially during the afternoon and evening hours. Some storms
may contain gusty winds. South to southwest winds will increase
on Tuesday, followed by northwest flow behind the cold front
Wednesday. Winds may reach SCA criteria Wednesday.

A high pressure system will influence the region leading to
light and variable winds Thursday. No small craft advisory is
expected. A southerly flow is expected to form Friday leading to
winds flowing northward up the chesapeake.

Tides coastal flooding
Freshwater continues to decrease as water levels on the potomac
river upstream have crested and they continue to fall.

Therefore, the threat for moderate flooding has ended. Minor
flooding is still expected near times of high tide through
tonight, and it is possible Tuesday for washington dc. Will
continue with the advisory through tonight, and it may need to
be extended into Tuesday as well.

Lwx watches warnings advisories
Dc... Coastal flood advisory until 6 am edt Tuesday for dcz001.

Md... None.

Va... None.

Wv... None.

Marine... None.

Synopsis... Mm
near term... Mm dhof
short term... Mm
long term... Jmg
aviation... Mm dhof jmg
marine... Mm dhof jmg
tides coastal flooding... Lwx


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TPLM2 - Thomas Point, MD 6 mi65 min S 16 G 17 69°F 69°F1021.6 hPa (+0.0)63°F
APAM2 - 8575512 - Annapolis, MD 10 mi47 min 71°F 1020.6 hPa
BSLM2 - Chesapeake Bay, MD 11 mi155 min SSE 4.1 75°F 1020 hPa63°F
CPVM2 13 mi47 min 70°F 64°F
FSNM2 25 mi59 min S 7 G 11 73°F 1020.4 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 25 mi47 min SSE 9.9 G 11 72°F 1020.5 hPa
WASD2 - 8594900 - Washington, DC 26 mi47 min SSE 2.9 G 6 74°F 66°F1020.7 hPa
BLTM2 - 8574680 - Baltimore, MD 29 mi47 min S 4.1 G 5.1 72°F 71°F1020.2 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 29 mi47 min SE 4.1 G 5.1 71°F 71°F1021.2 hPa
CA2 - 8571892 - Cambridge, MD 31 mi53 min 69°F 73°F1022.4 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 32 mi47 min S 13 G 16 68°F 1021.8 hPa
SLIM2 - 8577330 - Solomons Island, MD 37 mi47 min S 8.9 G 9.9 67°F 70°F1021.2 hPa
NCDV2 45 mi47 min SSE 8.9 G 9.9 71°F 78°F1020.3 hPa
PPTM2 - 8578240 - Piney Point, MD 49 mi47 min S 8.9 G 8.9

Wind History for Francis Scott Key Bridge NE Tower, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD9 mi71 minS 810.00 miFair72°F61°F68%1020.9 hPa
Bay Bridge Field, MD14 mi70 minS 67.00 miFair70°F62°F78%1021 hPa
Camp Springs / Andrews Air Force Base, MD18 mi69 minN 010.00 miFair69°F61°F78%1021.2 hPa
Fort Meade / Tipton, MD21 mi68 minN 010.00 miFair64°F60°F88%1021.7 hPa
College Park Airport, MD23 mi68 minN 010.00 miFair71°F60°F70%1020.7 hPa

Wind History from ADW (wind in knots)
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Last 24hrCalmCalmCalmN4N6NE9NE3NE3NE6NE8NE8E7NE7CalmCalmCalmCalmCalmSE8E6CalmCalmCalmCalm
1 day agoS9S8S10S7S9S10S8S8SW8SW8SW11
G16
SW9SW8W5SW9SW11
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SW12
G17
SW5CalmCalmCalmCalmCalmCalm
2 days agoE11E11E12E11E13E9E10
G17
E8E7NE7E5E3NE3CalmCalmCalmS4SE4S7S6S6S8S9S9

Tide / Current Tables for Shady Side, West River, Maryland
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Shady Side
Click for Map
Mon -- 01:26 AM EDT     Moonset
Mon -- 04:23 AM EDT     0.35 feet Low Tide
Mon -- 05:48 AM EDT     Sunrise
Mon -- 10:27 AM EDT     1.42 feet High Tide
Mon -- 12:08 PM EDT     Moonrise
Mon -- 05:54 PM EDT     0.29 feet Low Tide
Mon -- 08:17 PM EDT     Sunset
Mon -- 11:12 PM EDT     1.15 feet High Tide
Mon -- 11:50 PM EDT     First Quarter
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.70.60.40.40.40.50.711.31.41.41.31.10.90.70.50.30.30.40.60.811.1

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Mon -- 01:26 AM EDT     Moonset
Mon -- 01:47 AM EDT     -0.00 knots Slack
Mon -- 04:32 AM EDT     -0.55 knots Max Ebb
Mon -- 05:47 AM EDT     Sunrise
Mon -- 07:10 AM EDT     0.00 knots Slack
Mon -- 10:42 AM EDT     0.90 knots Max Flood
Mon -- 12:08 PM EDT     Moonrise
Mon -- 01:57 PM EDT     -0.00 knots Slack
Mon -- 05:22 PM EDT     -0.98 knots Max Ebb
Mon -- 08:16 PM EDT     Sunset
Mon -- 08:54 PM EDT     0.00 knots Slack
Mon -- 11:49 PM EDT     0.70 knots Max Flood
Mon -- 11:50 PM EDT     First Quarter
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.2-0.1-0.4-0.5-0.5-0.4-0.10.30.60.90.90.70.4-0-0.4-0.8-1-0.9-0.7-0.400.40.6

Weather Map and Satellite Images
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wmap_A
GOES 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.
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Wind Forecast for Baltimore, MD/Washington (22,6,7,8)
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Ground Weather Radar Station Dover AFB, DE
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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.