Friday, October19, 2018 L-36.com


Marine Weather and Tides
Indian Head, MD

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:21AMSunset 6:26PM Friday October 19, 2018 8:53 AM EDT (12:53 UTC) Moonrise 3:13PMMoonset 1:09AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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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ANZ535 Tidal Potomac From Key Bridge To Indian Head- 736 Am Edt Fri Oct 19 2018
.small craft advisory in effect from 2 pm edt this afternoon through Saturday afternoon...
Today..SW winds 5 to 10 kt with gusts to 20 kt... Becoming S 15 kt with gusts to 20 kt late. Waves 1 ft.
Tonight..SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers likely.
Sat..W winds 10 kt with gusts to 20 kt. Waves 1 ft.
Sat night..NW winds 10 to 15 kt. Gusts up to 20 kt...increasing to 35 kt after midnight. Waves 1 to 2 ft.
Sun..NW winds 15 kt with gusts to 35 kt. Waves 2 ft.
Sun night..NW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft.
Mon..SW winds 5 kt. Waves less than 1 ft.
Tue..NW winds 5 kt. Waves less than 1 ft.
ANZ500 736 Am Edt Fri Oct 19 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will move offshore today. A cold front will cross the waters Saturday with high pressure returning the second half of the weekend and persisting into early next week. Small craft advisories will likely be needed for portions of the waters Saturday night through Sunday. Gale conditions are likely late Saturday night into early Sunday.


7 Day Forecast for Marine Location Near Indian Head, MD
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location: 38.62, -77.2     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 190809
afdlwx
area forecast discussion
national weather service baltimore md washington dc
409 am edt Fri oct 19 2018

Synopsis High pressure will move offshore today. A cold front
will cross the area late Saturday followed by high pressure for
Sunday night and Monday. Another cold front will cross the area
on Tuesday with high pressure building again over the region
during the middle of next week.

Near term through tonight
It is chilly this morning with temperatures in the mid to upper
30s. It will be warmer today as winds become southerly as high
pressure shifts offshore. Highs will be in the mid 60s. High
clouds will be on the increase late today with skies becoming
overcast in the early evening. Light showers will break out this
evening in strengthening warm air advection pattern, but
amounts will be light due to dry low-levels.

Short term Saturday through Sunday night
Light showers early Sat will shift southeast of the area as
downslope westerly winds take over except in the upslope areas
of the appalachians. Cdfnt will cross the area late in the day
with rain showers turning into snow showers over the
appalachians. An inch or two of snow accumulation is possible
over western grant and pendleton counties late Sat night.

Breezy Sat night due to tightening pressure gradient between
deep low pressure over labrador and strong high pressure over
the middle of the country. Winds increase further on Sun due to
better mixing. Anticipating peak gusts will be around 40 mph
(below advy criteria) and temperatures only reaching around 50f
east of the mtns.

Long term Monday through Thursday
High pressure will reside overhead on Monday with dry and chilly
conditions persisting. This high will move offshore Monday night,
turning winds southerly and ushering in near seasonal temperatures
to the region. Low pressure will pass north of the great lakes,
moving into the new england states on Tuesday. This will drag
another cold front through the area Tuesday night, but the best lift
will reside well north of our area, so expecting a dry passage. High
pressure builds back over the region in its wake, and centers itself
just to our north Wednesday through Thursday night. Dry conditions
and below normal temperatures will win out as a result. Low pressure
across the southeastern u.S. May approach from southwest overnight
Thursday increasing the threat for showers, but model discrepancy
exists in the progression of the low and strength of the high to our
north. Will advertise a dry forecast through Thursday night for now
given the high uncertainty in the above elements.

Aviation 08z Friday through Tuesday
Light showers expected tonight with no flight restrictions.

Breezy Sat with gusts around 20 kt with frontal passage late
sat. Winds increasing further on Sun with gusts up to 35 kt from
the nw.

Vfr conditions expected through at least the first half of next week
as high pressure dominates and light southerly winds prevail. A dry
cold front will cross the terminals Tuesday night and into Wednesday
more, veering winds out of the north northwest in its wake. High
pressure returns Wednesday and Thursday with dry conditions and
continuedVFR conditions.

Marine
Sca conditions expected this afternoon through Sat night, then
gale conditions likely on sun.

Sca gusts look like a good bet Monday afternoon and into Tuesday as
high pressure shifts offshore and a cold front approaches from the
northwest, and crosses the waters Tuesday night and Wednesday
morning. SCA conditions may hold on Wednesday and Wednesday night as
winds remain elevated in the wake of the frontal passage as
northerly breezes take hold as high pressure builds to the
north.

Lwx watches warnings advisories
Dc... Frost advisory until 9 am edt this morning for dcz001.

Md... Freeze warning until 9 am edt this morning for mdz501-502.

Frost advisory until 9 am edt this morning for mdz003>006-011-
013-014-016>018-503>508.

Va... Freeze warning until 9 am edt this morning for vaz025>031-503-
504.

Frost advisory until 9 am edt this morning for vaz036>040-
050>057-501-502-505>508.

Wv... Freeze warning until 9 am edt this morning for wvz050>053-055-
501>506.

Marine... Small craft advisory from 2 pm this afternoon to 6 pm edt
Saturday for anz530>543.

Synopsis... Lfr
near term... Lfr
short term... Lfr
long term... Bkf lfr
aviation... Bkf lfr
marine... Bkf lfr


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 20 mi35 min ESE 1.9 G 1.9 48°F 62°F1028.6 hPa
NCDV2 22 mi41 min Calm G 1.9 43°F 63°F1028 hPa
BSLM2 - Chesapeake Bay, MD 28 mi143 min Calm 37°F 1029 hPa37°F
44062 - Gooses Reef, MD 42 mi33 min WSW 9.7 G 14 54°F 1029.1 hPa
TPLM2 - Thomas Point, MD 45 mi53 min W 7 G 8 51°F 64°F1029.3 hPa (+0.0)39°F
SLIM2 - 8577330 - Solomons Island, MD 45 mi35 min W 2.9 G 5.1 55°F 69°F1028.5 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 46 mi35 min W 7 G 8.9 52°F 1029.2 hPa
APAM2 - 8575512 - Annapolis, MD 46 mi35 min 53°F 1028.1 hPa
44063 - Annapolis 47 mi35 min W 5.8 G 5.8 49°F 1029 hPa
PPTM2 - 8578240 - Piney Point, MD 49 mi65 min W 5.1 G 7

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA8 mi2 hrsN 010.00 miFair36°F35°F99%1029.1 hPa
Quantico Marine Corps Airfield - Turner Field, VA9 mi57 minWNW 610.00 miFair40°F39°F97%1029 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA18 mi57 minN 010.00 miFair34°F34°F100%1029.9 hPa
Washington/Reagan National Airport, DC, VA19 mi61 minN 010.00 miFair45°F39°F83%1028.7 hPa
Stafford, Stafford Regional Airport, VA20 mi58 minN 010.00 miFair35°F34°F100%1029.8 hPa
Camp Springs / Andrews Air Force Base, MD23 mi57 minN 010.00 miFair38°F36°F91%1029 hPa

Wind History from DAA (wind in knots)
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Last 24hrCalmNW9
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NW10W4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
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NW3NW5NW3CalmNW9NW8NW5NW9NW6CalmCalmCalmCalm
2 days agoNW66--6NW4NW8NW5NW5CalmCalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW4NW3Calm

Tide / Current Tables for High Point, Occoquan Bay, Virginia
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High Point
Click for Map
Fri -- 02:09 AM EDT     Moonset
Fri -- 03:41 AM EDT     1.62 feet High Tide
Fri -- 07:22 AM EDT     Sunrise
Fri -- 10:11 AM EDT     0.29 feet Low Tide
Fri -- 04:12 PM EDT     Moonrise
Fri -- 04:16 PM EDT     1.57 feet High Tide
Fri -- 06:24 PM EDT     Sunset
Fri -- 10:21 PM EDT     0.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.21.51.61.61.51.20.90.60.40.30.40.611.21.51.61.51.30.90.60.40.30.3

Tide / Current Tables for Marshall Hall, Maryland
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Marshall Hall
Click for Map
Fri -- 02:09 AM EDT     Moonset
Fri -- 04:41 AM EDT     2.36 feet High Tide
Fri -- 07:21 AM EDT     Sunrise
Fri -- 10:49 AM EDT     0.41 feet Low Tide
Fri -- 04:12 PM EDT     Moonrise
Fri -- 05:16 PM EDT     2.29 feet High Tide
Fri -- 06:24 PM EDT     Sunset
Fri -- 10:59 PM EDT     0.41 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.41.82.12.32.32.11.61.10.80.50.40.611.51.92.12.32.21.81.30.80.50.4

Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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 (8,2,3,4)
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Ground Weather Radar Station Sterling, VA
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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.