Monday, August21, 2017 L-36.com


Marine Weather and Tides
Lexington Park, 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 6:26AMSunset 7:54PM Monday August 21, 2017 11:17 PM EDT (03:17 UTC) Moonrise 5:08AMMoonset 6:57PM Illumination 0% Phase: New Moon; 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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ANZ542 Patuxent River To Broomes Island Md- 1031 Pm Edt Mon Aug 21 2017
.small craft advisory in effect from Tuesday afternoon through Tuesday evening...
Rest of tonight..S winds 10 kt. Waves 1 ft. Isolated showers late this evening, then a slight chance of showers and tstms.
Tue..S winds 5 to 10 kt. Gusts up to 20 kt in the late morning and afternoon. Waves 1 ft.
Tue night..SW winds 5 to 10 kt. Gusts up to 20 kt until early morning. Waves 1 ft.
Wed..NW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Wed night..N winds 5 to 10 kt. Waves 1 ft.
Thu..N winds 5 to 10 kt. Waves 1 ft.
Thu night..NE winds 5 kt. Waves less than 1 ft.
Fri..N winds 5 to 10 kt. Waves 1 ft.
Sat..NE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1031 Pm Edt Mon Aug 21 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain offshore through tonight. A cold front will cross the waters late Tuesday night into early Wednesday. High pressure will return for the second half of the week.

7 Day Forecast for Marine Location Near Lexington Park, MD
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location: 38.27, -76.46     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 220115
afdlwx
area forecast discussion
national weather service baltimore md washington dc
915 pm edt Mon aug 21 2017

Synopsis
High pressure will remain offshore tonight and a strong cold
front will approach our area Tuesday before passing through
Tuesday night into Wednesday. Showers and thunderstorms are
possible ahead of this cold front. The front could stall to our
southeast, while a second area of high pressure builds in from
the west later this week.

Near term until 6 am Tuesday morning
Most of the convection from this afternoon and early evening has
dissipated. However... Very humid conditions persist and a weak
surface trough remains near the blue ridge mountains.

Therefore... A popup shower or thunderstorm cannot be ruled out
through late this evening.

High pressure will remain offshore overnight. A southerly flow
will continue to usher in warm and quite humid conditions. Min
temperatures will range from the 60s in the potomac highlands
to the mid and upper 70s in downtown washington and baltimore.

Most places should turn out dry overnight as the nocturnal
inversion strengthens. Patchy low clouds and fog are
possible... Especially in sheltered valleys and areas that have
received rainfall from thunderstorms earlier.

Short term 6 am Tuesday morning through Wednesday night
A very warm day on tap Tuesday with highs in the lower to mid
90s. Will have to keep an eye on dewpoints Tuesday... Because a
heat advisory may be needed for portions of the
area... Particularly along and east of the interstate 95
corridor. As of now... It appears that the low-level flow may go
slightly west of south and this will cause winds to be better
aligned with height... Increasing mixing. Therefore... Dewpoints
may drop into the upper 60s and lower 70s. If this occurs... Then
heat indices will be closer to 100 degrees. However... If not
then dewpoints would hold in the middle 70s causing heat indices
closer to 105 degrees. Will mention the possibility of heat in
the hazardous weather outlook for now.

A cold front will move into the ohio valley by Tuesday
evening... Bringing a chance of thunderstorms to the western part
of the forecast area late in the afternoon evening. Given the
amount of CAPE that will be available severe weather is a
possibility, especially west of the blue ridge. SREF has been
consistent on weakening the storms after 00z Wednesday as these
attempt to track east of the mountains - we'll have to see.

The front is expected to move through the forecast area Tuesday
night into Wednesday morning. This will bring a drop of about
ten degrees to the region Wednesday, and the start of some very
pleasant weather that will go into the weekend.

Long term Thursday through Monday
High pressure passing from the great lakes into new england will
control the weather pattern over the mid-atlantic late this week
through the weekend. Temperatures and humidity will be below normal,
more reminiscent of late september than late august. Precipitation
chances will be minimal during this time.

Aviation 01z Tuesday through Saturday
Vfr conditions are expected for most of the time through
Tuesday. Patchy fog is possible early Tuesday morning. Do have a
period of MVFR vsbys for the western terminals... But current
thinking is that alight gradient wind will prevent dense fog
from developing.

Thunderstorms will again be possible Tuesday night. Mrb may be
the most at risk.

Vfr again Wednesday.

MainlyVFR expected W light N flow as high pressure moves
to the north thu-fri.

Marine
Southerly winds will channel up the bay and lower tidal potomac
river tonight. A small craft advisory is in effect. There has
been a lull in the gusty winds this evening... But wind gusts
around 20 knots are expected overnight as the gradient
strengthens.

Another SCA is in effect Tuesday afternoon evening ahead of an
approaching cold front.

Generally light flow is expected over the waters late in the
week as high pressure moves by to the north.

Tides coastal flooding
Tidal anomalies are around one half to three quarters of a foot
above normal this evening. These anomalies should hold nearly
steady through tonight with a southerly flow in place. The next
high tide overnight into early Tuesday will be the higher of the
two astronomical norms... And water levels will be close to minor
flooding thresholds. A coastal flood advisory is in effect for
anne arundel county where confidence is highest near annapolis.

Elsewhere... Will have to watch straits point in st marys
county... Baltimore and washington dc. Did not issue an advisory
at this time since the surface flow may go just west of south.

A south to southwest flow will persist through Tuesday and into
Tuesday night. More minor flooding is possible near times of
high tide Tuesday night. An offshore flow will develop behind a
cold front Wednesday.

Lwx watches warnings advisories
Dc... None.

Md... Coastal flood advisory from 4 am to 9 am edt Tuesday for
mdz014.

Va... None.

Wv... None.

Marine... Small craft advisory until 6 am edt Tuesday for anz531>534-537-
539>541-543.

Small craft advisory from noon to 11 pm edt Tuesday for
anz530>543.

Synopsis... Bjl
near term... Abw
short term... Abw
long term... Dfh
aviation... Abw dfh
marine... Abw dfh
tides coastal flooding... Bjl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SLIM2 - 8577330 - Solomons Island, MD 4 mi47 min S 2.9 G 5.1 80°F 83°F
COVM2 - 8577018 - Cove Point LNG Pier, MD 10 mi47 min SSW 8 G 8.9 79°F 1021.1 hPa
PPTM2 - 8578240 - Piney Point, MD 10 mi47 min S 9.9 G 9.9
44042 - Potomac, MD 18 mi37 min S 9.7 G 12 82°F 1020.1 hPa
LWTV2 - 8635750 - Lewisetta, VA 19 mi47 min S 6 G 7 80°F 85°F1020.8 hPa
44062 - Gooses Reef, MD 20 mi37 min S 7.8 G 9.7 80°F 1021 hPa
BISM2 - 8571421 - Bishops Head, MD 23 mi47 min S 12 G 15 82°F 82°F1020.8 hPa
CA2 - 8571892 - Cambridge, MD 30 mi47 min 79°F 83°F1021.3 hPa
NCDV2 31 mi47 min SW 2.9 G 4.1 76°F 85°F1019.4 hPa
BSLM2 - Chesapeake Bay, MD 38 mi107 min SW 1 71°F 1020 hPa69°F
TPLM2 - Thomas Point, MD 43 mi77 min SSW 7 G 8 79°F 81°F
44063 - Annapolis 48 mi37 min SSE 5.8 G 7.8
APAM2 - 8575512 - Annapolis, MD 49 mi47 min 78°F 1019.6 hPa

Wind History for Solomons Island, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Patuxent River, Naval Air Station, MD3 mi25 minS 510.00 miPartly Cloudy78°F77°F97%1020.3 hPa
St Marys County Airport, MD6 mi40 minN 010.00 miFair75°F73°F94%1021.3 hPa
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD9 mi84 minS 5 miFair80°F77°F90%1020.4 hPa

Wind History from NHK (wind in knots)
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Last 24hrCalmS3CalmCalmSW5CalmCalmS4CalmS7SE3SE6SE11SE10SE11SE11S7S7S7S5S5S4CalmS5
1 day agoSW5N5CalmCalmW3NW3N6NW7NW7N6N10N8N7N4NE6NE7NE5E4E4CalmS3S4CalmS3
2 days agoCalmSW7W8W4W4W5W3W6W5NW7NW9NW5N4N65E6SE5SE63SW3SW3S4S4S3

Tide / Current Tables for Solomons Island, Patuxent River, Maryland
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Solomons Island
Click for Map
Mon -- 02:19 AM EDT     1.81 feet High Tide
Mon -- 06:08 AM EDT     Moonrise
Mon -- 06:25 AM EDT     Sunrise
Mon -- 08:42 AM EDT     0.38 feet Low Tide
Mon -- 02:30 PM EDT     1.63 feet High Tide
Mon -- 02:31 PM EDT     New Moon
Mon -- 07:51 PM EDT     Sunset
Mon -- 07:57 PM EDT     Moonset
Mon -- 08:46 PM EDT     0.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.71.81.81.61.310.70.40.40.60.81.21.41.61.61.41.10.80.50.20.20.40.7

Tide / Current Tables for Point Patience, 0.1 mile southwest of, Maryland Current
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Point Patience
Click for MapFlood direction 315 true
Ebb direction 145 true

Mon -- 01:45 AM EDT     -0.00 knots Slack
Mon -- 05:42 AM EDT     -1.08 knots Max Ebb
Mon -- 06:08 AM EDT     Moonrise
Mon -- 06:26 AM EDT     Sunrise
Mon -- 09:59 AM EDT     0.00 knots Slack
Mon -- 11:41 AM EDT     0.47 knots Max Flood
Mon -- 02:00 PM EDT     -0.00 knots Slack
Mon -- 02:31 PM EDT     New Moon
Mon -- 05:46 PM EDT     -0.85 knots Max Ebb
Mon -- 07:51 PM EDT     Sunset
Mon -- 07:57 PM EDT     Moonset
Mon -- 09:32 PM EDT     0.00 knots Slack
Mon -- 11:49 PM EDT     0.67 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.3-0.1-0.5-0.8-1-1.1-1-0.7-0.400.40.50.30-0.3-0.6-0.8-0.8-0.7-0.5-0.20.20.6

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 (23,6,7,8)
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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.