Monday, March25, 2019 L-36.com


Marine Weather and Tides
Aquia Harbour, 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 7:04AMSunset 7:27PM Monday March 25, 2019 8:26 PM EDT (00:26 UTC) Moonrise 11:46PMMoonset 9:14AM Illumination 75% 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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ANZ536 Tidal Potomac From Indian Head To Cobb Island- 800 Pm Edt Mon Mar 25 2019
.small craft advisory in effect through Tuesday afternoon...
Tonight..N winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. A chance of light rain.
Tue..N winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
Tue night..NE winds 5 to 10 kt. Waves 1 ft.
Wed..NE winds 5 kt. Waves less than 1 ft.
Wed night..SE winds around 5 kt. Waves 1 ft.
Thu..S winds 5 to 10 kt. Waves 1 ft.
Thu night..S winds 5 to 10 kt. Waves 1 ft.
Fri..S winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft.
ANZ500 800 Pm Edt Mon Mar 25 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will drop south across the waters this evening as low pressure moves eastward off the north carolina coast. High pressure will build in from the great lakes through the middle of the week. A cold front may approach from the north Friday while high pressure moves into the western atlantic.


7 Day Forecast for Marine Location Near Aquia Harbour CDP, VA
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location: 38.42, -77.35     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 251835
afdlwx
area forecast discussion
national weather service baltimore md washington dc
235 pm edt Mon mar 25 2019

Synopsis
A cold front will drop south through the area this evening as
low pressure moves eastward off the north carolina coast. High
pressure will build in from the great lakes through the middle
of the week. A cold front may approach from the north Friday
while high pressure moves into the western atlantic. An area of
low pressure may approach from the ohio valley this weekend.

Near term through tonight
Axis of steadier light rain seems poised to pivot along or just
north of the maryland pennsylvania border this afternoon and
early evening, coincident with mid-level frontogenesis to the
north of a developing surface low over southern west virginia.

South of this frontal zone, forcing is a touch weaker and
briefer, so although some occasional light rain is expected
across pretty much the entire area, amounts are expected to be
quite light (around a tenth of an inch or less).

As the surface low gradually deepens while moving east of
norfolk this evening, the mid-level frontal zone will pivot
across the area while weakening. Moisture will become more
shallow, with occasional light rain transitioning to patchy
drizzle before ending around or just after midnight on drying
northerly flow. These northerly winds will also bring in cooler
air, with temperatures becoming cold enough for a brief
transition to wet snow over the ridges (2500 feet and higher),
where a coating to an inch is possible.

Lows tonight are expected to drop into the upper 20s and lower
30s. Cold air advection is often delayed due to downsloping
behind fronts, but flow tonight will be more northerly rather
than the typical northwesterly which should cut down on any
compressional heating component. Wind chills are expected to
drop into the teens and 20s.

Short term Tuesday through Wednesday night
High pressure will build in from the great lakes Tuesday and
Wednesday. Breezy north winds Tuesday will gradually diminish as
the high pressure center builds just to our north over pennsylvania.

High temperatures will be about 10 degrees below normal Tuesday,
generally in the 40s. Lows will again fall into the 20s and 30s
Tuesday night before rising into the lower 50s Wednesday as the
airmass overhead slightly moderates.

Long term Thursday through Sunday
The long term period will feature predominantly dry conditions, with
warming temperatures.

On Thursday, high pressure will slide offshore as a large and
potent upper-level trough swings across eastern canada. The
strongest forcing for ascent ahead of the trough will be displaced
well off to our north, leading to mainly dry conditions on Thursday.

However, it's not entirely out of question that the southernmost
portion of the lift may clip northwestern portions of our
forecast area Thursday night into Friday. High temperatures on
Thursday will continue to moderate, reaching into the low 60s.

Friday will be very similar to Thursday, with mainly dry conditions
and a slight chance for showers in northwestern portions of the
forecast area. It will be noticeably warmer, with temperatures maxing
out around 70.

The pattern at mid-upper levels will amplify heading into next
weekend as a shortwave ejects out of the rockies and phases with
another trough descending out of canada in northerly flow. With the
system still well off to our northwest, conditions should stay dry
once again on Saturday, with temperatures reaching into the low-mid
70s. The next chance for appreciable rainfall appears to be on
Sunday as the cold front associated with the aforementioned
system progresses through.

Aviation 18z Monday through Saturday
A period of MVFR CIGS vsbys are expected at all terminals late
this afternoon into this evening as light rain and patchy
drizzle move in along a cold front. Some patchy brief ifr is
possible, but not enough confidence to put in the taf ATTM given
drier low levels and ensuing northerly flow. These northerly
winds will increase tonight, gusting to 20-25 kts through
Tuesday as high pressure builds in, withVFR returning 6-9z and
likely persisting through Wednesday.

Vfr conditions are expected Thursday through Saturday as high
pressure moves offshore.

Marine
A cold front will drop south across the waters this evening as
low pressure moves eastward off the north carolina coast.

Northerly winds will increase as high pressure builds in from
the great lakes tonight, with gusts of 25 to 30 kts expected
late tonight into Tuesday. Winds are expected to diminish by
Tuesday evening as the high center moves closer (just to the
north) and the gradient relaxes. Sub SCA level winds then
expected under the influence of high pressure through Wednesday.

Sub sca-level winds and dry conditions are forecast over the waters
for Thursday and Friday, with high pressure centered just to our
southeast over the western atlantic.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory until 2 pm edt Tuesday for anz530-531-535-
538-539.

Small craft advisory from 6 pm this evening to 6 pm edt
Tuesday for anz534-537-542-543.

Small craft advisory until 6 pm edt Tuesday for anz532-533-540-
541.

Small craft advisory from 6 pm this evening to 2 pm edt
Tuesday for anz536.

Synopsis... Dhof
near term... Dhof
short term... Dhof
long term... Kjp
aviation... Dhof kjp
marine... Dhof kjp


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 18 mi45 min 54°F 1014.9 hPa
WASD2 - 8594900 - Washington, DC 36 mi39 min 49°F 48°F1017.3 hPa
BSLM2 - Chesapeake Bay, MD 42 mi117 min NNE 5.1 52°F 1016 hPa40°F
PPTM2 - 8578240 - Piney Point, MD 48 mi57 min E 8 G 13
SLIM2 - 8577330 - Solomons Island, MD 48 mi39 min 49°F 49°F1015.4 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stafford, Stafford Regional Airport, VA6 mi52 minNNW 610.00 miOvercast53°F43°F70%1016.6 hPa
Quantico Marine Corps Airfield - Turner Field, VA7 mi31 minNE 15 G 1910.00 miOvercast53°F43°F69%1016.2 hPa
Fredericksburg, Shannon Airport, VA12 mi32 minNE 310.00 miOvercast55°F45°F70%1014.9 hPa
Warrenton-Fauquier Airport, VA22 mi52 minNNE 910.00 miOvercast50°F42°F76%1015.9 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA23 mi31 minN 1010.00 miOvercast48°F44°F86%1017.8 hPa
Fort Belvoir, VA23 mi31 minNE 5 G 1510.00 miOvercast52°F41°F68%1016.6 hPa

Wind History from RMN (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmNW4CalmCalmCalmNE4E7CalmNE8E8E8NE5E9
G16
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1 day agoCalmSE3CalmCalmN3CalmNW5CalmW3CalmCalmCalmCalmCalmS5SW6S4SW6SW6SE8SW8SW9SW5Calm
2 days agoNW17
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Tide / Current Tables for Aquia Creek, Virginia
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Aquia Creek
Click for Map
Mon -- 04:04 AM EDT     0.08 feet Low Tide
Mon -- 07:05 AM EDT     Sunrise
Mon -- 10:06 AM EDT     1.56 feet High Tide
Mon -- 10:13 AM EDT     Moonset
Mon -- 04:49 PM EDT     0.01 feet Low Tide
Mon -- 07:25 PM EDT     Sunset
Mon -- 10:37 PM EDT     1.14 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.50.20.10.20.50.91.21.41.61.51.210.70.40.100.20.50.70.91.11.1

Tide / Current Tables for Quantico Creek, Virginia
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Quantico Creek
Click for Map
Mon -- 04:50 AM EDT     0.00 feet Low Tide
Mon -- 07:05 AM EDT     Sunrise
Mon -- 10:13 AM EDT     Moonset
Mon -- 11:10 AM EDT     1.72 feet High Tide
Mon -- 05:37 PM EDT     -0.02 feet Low Tide
Mon -- 07:25 PM EDT     Sunset
Mon -- 11:49 PM EDT     1.51 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.10.70.30.100.10.50.91.31.61.71.61.30.90.60.30-00.20.611.31.5

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 (20,4,5,8)
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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.