Friday, May24, 2019 L-36.com


Marine Weather and Tides
Mason Neck, VA

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 5:48AMSunset 8:22PM Friday May 24, 2019 8:49 AM EDT (12:49 UTC) Moonrise 12:00AMMoonset 9:49AM Illumination 70% Phase: Waning Gibbous; Moon at 20 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- 737 Am Edt Fri May 24 2019
.small craft advisory in effect through this evening...
Today..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Tonight..NE winds 5 to 10 kt. Waves 1 ft.
Sat..S winds 5 to 10 kt. Waves 1 ft.
Sat night..S winds 5 to 10 kt. Waves 1 ft.
Sun..W winds 5 to 10 kt. Waves 1 ft.
Sun night..NW winds around 5 kt. Waves 1 ft. A chance of showers.
Mon..S winds around 5 kt. Waves 1 ft.
Tue..SW winds around 5 kt. Waves 1 ft.
ANZ500 737 Am Edt Fri May 24 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will cross the area this morning, settling over southern virginia tonight. High pressure will transit the region tonight, before shifting offshore Saturday as a warm front lifts toward the waters Saturday night. A weak cold front will approach from the north on Sunday, lingering nearby through Monday. Small craft advisories may be needed Saturday night, and again late Monday.


7 Day Forecast for Marine Location Near Mason Neck, VA
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location: 38.65, -77.13     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 240802
afdlwx
area forecast discussion
national weather service baltimore md washington dc
402 am edt Fri may 24 2019

Synopsis
A cold front will drift southward into the area this morning,
settling near southern virginia this evening. High pressure will
crest over the area tonight, migrating off the mid-atlantic
coast on Saturday. A weak cold front will approach from the
north and linger nearby Sunday and Monday. Bermuda high pressure
sets up toward the middle portion of next week, resulting in
hot and humid conditions over much of the eastern united states.

Near term through tonight
Radar activity has waned significantly over the last 12 hours,
with just a few weak showers heading toward central virginia. A
cold currently situated near the mason dixon line will continue
its track southward into our CWA this morning, settling across
southern virginia by this evening. As a result, drier air will
filter into the area today, as dewpoints currently well into the
60s fall back into 50s by this afternoon. The drier air will be
transported on increasing northwesterly flow in the wake of the
front, which will be breezy at times today. Mostly clear skies
early this morning will persist today, allowing for ample
sunshine and temperatures rising into the low to middle 80s.

While temperatures will be above normal for late may, the drier
air will definitely take away the preview of summer we
experienced yesterday.

High pressure centered over the great lakes this morning will
transit overhead tonight, turning winds light and northerly,
while delivering dry conditions and temperatures ranging in the
middle 50s to lower 60s.

Short term Saturday through Sunday night
Increasing clouds expected Saturday morning as the high shifts
off the mid atlantic coast and the frontal boundary starts to
lift northward as a warm front, settling near the potomac
highlands by days end. The shifting high will also veer winds
southerly, helping pump back into the area increasing humidity
late in the day. As a result, afternoon showers and a few
thunderstorms will be possible mainly along and west of the i-81
corridor. Only carrying chance pops for now, so definitely not
a washout for our mountain zones. Temperatures will actually be
a touch cooler on Saturday compared to today as the warm front
doesn't actually lift through the area until Saturday night.

Highs will top out in the lower 80s for most. A few showers will
be possible across our northern tier Saturday night as the warm
front does lift through the area, but a majority of locations
will remain dry. Lows Saturday night holding in the middle 60s.

Much warmer and humid conditions forecast on Sunday as the warm
front races northward into new england and winds taking on a
downsloping westerly flow. Temperatures will rise well into the
80s, with some low 90 degree readings quite possible across
central virginia. A weak cold front will be approaching from the
north on Sunday, residing just to our north by Sunday evening.

The warm and humid conditions combined with the approaching
front will allow for afternoon showers and storms to spark,
favoring northern western md and eastern WV with the highest
pops. Models are hinting at convection earlier in the day
across il in tracking eastward along the frontal boundary and
nearing our area Sunday evening and night. Given the likely
nocturnal arrival of this activity, which will be weakening as
it travels eastward, and a meager shortwave trough tracking
overhead, will advertise showers and isolated thunderstorms
during the evening, with a chance of showers continuing
overnight. That being said, there will be enough
instability shear, as well as the frontal forcing to bring a
potential for at least some strong thunderstorms across western
md and eastern wv. Will have to monitor this threat over the
next couple of days.

Long term Monday through Thursday
A cold front will drop into the area from the north for memorial
day, resulting in a modest cool-down along with more clouds and the
risk of a shower or t-storm. This trend reverses by Tuesday, as a
wave of low pressure passing to the north helps nudge the front back
to our north and allows warm humid air to overspread the region once
again. Bermuda high pressure will thus regain control, and its
strength should increase by Wednesday, with latest guidance hinting
at widespread low-mid 90s for afternoon highs mid-week. By Thursday,
a cold front will be approaching from the northwest, resulting in a
modest drop in temps and an increased risk of showers and
t-storms.

Aviation 07z Friday through Tuesday
A cold front will sink southward across the terminals this
morning, settling to the south by this evening. As such, drier air
will filter into the region on breezy northwest winds, gusting
upwards of 25 knots through this afternoon.

High pressure will transit the terminals overnight and early
Saturday, with continuedVFR conditions. Afternoon
showers storms may yield an episode of subVFR conditions at
mrb, but restrictions at all other terminals not expected with a
developing light southerly wind. Better chance of
showers and storms Sunday afternoon and overnight as a cold
front nears the terminals from the north, thus the chance for
brief subVFR conditions exists.

Low clouds could impact the terminals Monday or Tuesday on the cool
side of a slow moving frontal boundary. By afternoon both days, the
risk of sub-vfr conditions should generally lessen, particularly
Tuesday as the front lifts back north. A stray shower or t-storm is
also possible, especially Monday.

Marine
As a cold front pushes southward through the waters today, gusty
northwest winds will take hold. As such, SCA conditions are
expected until early this evening across all waters. High
pressure will transit the waters overnight, with lighter winds
prevailing.

Increasing southerly flow is expected on Saturday as the high
shifts offshore. Marginal SCA gusts will be possible Saturday
afternoon and night, but confidence in occurrence and coverage
is too low at this time for any sca. Showers storms could cross
the waters late Sunday and Sunday night, delivering gusty winds.

Outside of this activity, winds are expected to remain westerly
and sub sca.

A shower or thunderstorm is possible Monday, though the risk of
special marine warnings appears to be low. Conditions should be
more tranquil Tuesday as a slow moving frontal boundary lifts
back north of the waters.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 7 am this morning to 8 pm edt this
evening for anz530>543.

Synopsis... Bkf
near term... Bkf
short term... Bkf
long term... Rcm
aviation... Bkf rcm
marine... Bkf rcm


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WASD2 - 8594900 - Washington, DC 16 mi50 min NNW 8 G 15 74°F 71°F1016.8 hPa (+3.3)
NCDV2 23 mi50 min NNW 8 G 12 76°F 73°F1015.2 hPa (+2.5)
44062 - Gooses Reef, MD 38 mi56 min NNW 18 G 19 73°F 1015.6 hPa
APAM2 - 8575512 - Annapolis, MD 41 mi50 min 77°F 1015.2 hPa (+2.8)
TPLM2 - Thomas Point, MD 41 mi50 min WNW 14 G 18 73°F 67°F1016.8 hPa (+2.9)58°F
44063 - Annapolis 42 mi50 min NNE 16 G 18 72°F 68°F1015.7 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 43 mi50 min N 14 G 16 72°F 1016 hPa (+2.5)
SLIM2 - 8577330 - Solomons Island, MD 43 mi50 min NNW 8.9 G 14 75°F 69°F1014.9 hPa (+2.3)
CPVM2 46 mi50 min 74°F 56°F
PPTM2 - 8578240 - Piney Point, MD 48 mi62 min N 14 G 15

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Belvoir, VA6 mi52 minNNW 10 G 15 miPartly Cloudy73°F57°F57%1016.3 hPa
Quantico Marine Corps Airfield - Turner Field, VA13 mi1.9 hrsNNW 710.00 miFair75°F68°F79%1015.5 hPa
Washington/Reagan National Airport, DC, VA15 mi58 minNNW 13 G 2510.00 miPartly Cloudy74°F53°F48%1016.5 hPa
Camp Springs / Andrews Air Force Base, MD19 mi54 minNW 11 G 2410.00 miFair73°F52°F48%1016.4 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA21 mi54 minNNW 13 G 1910.00 miFair73°F57°F57%1017.7 hPa
Stafford, Stafford Regional Airport, VA24 mi55 minN 11 G 1510.00 miFair75°F68°F78%1017.6 hPa

Wind History from DAA (wind in knots)
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Last 24hrS7SW6S5S4S10S10
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SE5SE5SE3S8Calm----------------NW5NW9NW10
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1 day agoCalmCalmSE6CalmS4S7S4SE5SE4SE5SE5SE3CalmCalmCalmSE4SE5SE5S5SE5SE5S6S5S6
2 days agoNW12
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Tide / Current Tables for Gunston Cove, Virginia
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Gunston Cove
Click for Map
Fri -- 12:22 AM EDT     2.09 feet High Tide
Fri -- 12:45 AM EDT     Moonrise
Fri -- 05:49 AM EDT     Sunrise
Fri -- 06:28 AM EDT     0.41 feet Low Tide
Fri -- 10:48 AM EDT     Moonset
Fri -- 12:25 PM EDT     2.22 feet High Tide
Fri -- 07:17 PM EDT     0.33 feet Low Tide
Fri -- 08:21 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.121.71.30.90.60.40.40.71.21.722.22.21.91.51.10.70.50.30.40.71.21.7

Tide / Current Tables for Deep Point, Mattawoman Creek, Maryland
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Deep Point
Click for Map
Fri -- 12:45 AM EDT     Moonrise
Fri -- 05:44 AM EDT     0.34 feet Low Tide
Fri -- 05:50 AM EDT     Sunrise
Fri -- 10:49 AM EDT     Moonset
Fri -- 11:41 AM EDT     1.79 feet High Tide
Fri -- 06:33 PM EDT     0.28 feet Low Tide
Fri -- 08:21 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.51.10.80.50.40.30.50.81.31.61.81.81.61.310.70.50.30.30.50.91.31.5

Weather Map and Satellite Images
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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.