Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Aquia Harbour, VA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:23AMSunset 7:53PM Saturday April 21, 2018 5:48 AM EDT (09:48 UTC) Moonrise 10:05AMMoonset 12:00AM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 433 Am Edt Sat Apr 21 2018
Rest of the overnight..N winds 5 kt. Waves less than 1 ft.
Today..NW winds 5 kt. Waves less than 1 ft.
Tonight..E winds around 5 kt. Waves 1 ft.
Sun..SE winds around 5 kt. Waves 1 ft.
Sun night..SE winds around 5 kt. Waves 1 ft.
Mon..SE winds 5 to 10 kt. Waves 1 ft.
Mon night..E winds 5 to 10 kt. Waves 1 ft. A chance of rain.
Tue..E winds 5 to 10 kt. Waves 1 to 2 ft. Rain.
Wed..N winds 5 kt. Waves less than 1 ft. Rain in the morning, then showers likely through the night. A chance of showers after midnight.
ANZ500 433 Am Edt Sat Apr 21 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. An expansive area of high pressure will build eastward from the great lakes region this weekend, moving off the new england coast early next week. An area of low pressure over the deep south will approach the region mid week. Small craft advisories may be needed late Monday into Tuesday.

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 210759
afdlwx
area forecast discussion
national weather service baltimore md washington dc
359 am edt Sat apr 21 2018

Synopsis
High pressure over the great lakes will slowly move east into the
northeast u.S. By Sunday night. This high will move offshore Monday.

A low pressure system will bring unsettled weather to the region
Monday night through the middle of next week.

Near term through tonight
Skies are generally clear across the region thanks to broad high
pressure over the great lakes region. There could be a few thin
cirrus clouds streaming overhead. Winds are light out of the
northeast to northwest across maryland, eastern west virginia and
northeast to eastern virginia. Winds are calm to the southwest.

Temperatures range from near 30 degrees in parts of the western
ridges to the lower to middle 40s along i-95 and the chesapeake bay
area. A freeze warning remains in effect for the shenandoah valley
and areas to the east, but just to the west of the heavily populated
suburbs of washington d.C. And baltimore. Any frost overnight and
early this morning will be patchy due to the dry low levels of the
atmosphere.

Quiet weather conditions expected much of this weekend as high
pressure remains in control and gradually builds to the east from
the great lakes to the northeast u.S. Light winds and below normal
temperatures are expected as a result. Additional middle and high
clouds will move overhead this afternoon and linger through tonight.

High temperatures should reach the lower to middle 60s this
afternoon. With the additional middle level clouds and increasing
low level dewpoint temperatures, we don't anticipate freezing
temperatures for a second night in a row tonight. Low temperatures
will bottom out in the upper 30s to lower 40s.

Short term Sunday through Monday night
High pressure will continue to provide partial sunshine and tranquil
conditions Sunday into Sunday night. High temperatures Sunday will
reach the lower to middle 60s, while low temperatures will drop down
into the middle 40s and near 40 in the western ridges and along the
mason-dixon region.

As the high pressure moves offshore Monday, winds will become more
persistently from the southeast, bringing additional moisture into
the region. A cut-off low pressure system will work its way up the
east coast from the southeast u.S. To the carolinas Monday and
Monday night. Some rain should begin to overspread the region from
southwest to northeast, beginning with the central shenandoah
valley. Temperatures Monday could be just a few degrees below
normal.

Long term Tuesday through Friday
Unsettled weather conditions expected Tuesday into Wednesday as
low pressure over the southeastern u.S. And an upper level
cutoff low over tn ky nears our region. Rain chances will be
increasing during the day on Tuesday from southwest to northeast
as low pressure spreads northeastward. Models trending to favor
the latter half of Tuesday before the rain moves in to the
metro areas, with our far southwestern zones seeing activity
pick up early Tuesday morning. Continued rain chances expected
to persist in to the day on Wednesday as weak surface low
pressure hovers near the carolina coastline and mid level
troughing starts to dampen a bit. This low pressure area will
move off to the northeast during the day on Wednesday, bringing
a downward trend to shower activity across the region.

Another shortwave trough will approach from the west Wednesday night
and Thursday as surface low pressure passes to our west, bringing
additional moisture and isentropic lift across the area. Some model
differences remain with regards to the strength of these features
and ultimately the coverage amount of rain during this time period.

The stubborn mid to upper level troughing will hang around on
Friday, as surface low pressure passes to our north, and a cold
front looks poised to move through the mid atlantic region Friday
night.

Below normal temperatures will be maintained Tuesday and Wednesday
with elevated moisture and increased cloud coverage, with a return
to near normal temperatures Thursday and Friday, potentially
breaking the 70 degree mark for portions of the area to close
out the work week.

Aviation 08z Saturday through Wednesday
Vfr conditions expected through Monday with light and variable
winds, becoming southeast 5 to 10 knots by Monday afternoon. MVFR
conditions are possible at the cho terminal Monday night with some
light rain approaching from the southwest.

Sub-vfr conditions expected Tuesday through Wednesday as a broad
area of low pressure will impact the terminals with increasing rain
chances. Heaviest rain and ultimately greatest flight restrictions
will likely occur Tuesday night into Wednesday morning, where
ifr lifr conditions will be possible. Increasing easterly breezes
are forecast Tuesday into Wednesday, with gusts nearing 20 knots
Tuesday. As the main area of low pressure starts to pull away
from the area Wednesday, winds will abate a bit, backing out of
the north northeast and turning light, with MVFR vis cigs
likely persisting into Wednesday night.

Marine
No marine hazards expected through Monday. Winds will be light and
variable, becoming southeast around 10 knots by Monday. Small craft
advisory conditions may be possible Monday night. Winds southeast
becoming east 10 to 15 knots with possible gusts up to 20 knots.

A broad area of low pressure will impact the waters Tuesday into
Wednesday, with SCA conditions likely during this time period as a
strong easterly flow develops across the area. As low pressure
starts to move off to the northeast on Wednesday, sub-sca conditions
forecast to return for the latter half of the day.

Tides coastal flooding
Persistent onshore flow is expected to result in increased tidal
anomalies and possible coastal flooding during the middle part
of next week.

Lwx watches warnings advisories
Dc... None.

Md... Freeze warning until 9 am edt this morning for mdz003>006-503-
505-507-508.

Va... Freeze warning until 9 am edt this morning for vaz025>031-
038>040-051-501-502-505>508.

Wv... Freeze warning until 9 am edt this morning for wvz051>053.

Marine... Small craft advisory until 6 am edt early this morning for
anz534-537-543.

Synopsis... Klw
near term... Klw
short term... Klw
long term... Bkf
aviation... Bkf klw
marine... Bkf klw
tides coastal flooding... Dhof


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 18 mi49 min ENE 1.9 G 4.1 43°F 55°F1030.4 hPa (+1.4)
WASD2 - 8594900 - Washington, DC 36 mi49 min ENE 1 G 4.1 44°F 53°F1031.4 hPa (+0.7)
BSLM2 - Chesapeake Bay, MD 42 mi139 min Calm 42°F 1031 hPa30°F
PPTM2 - 8578240 - Piney Point, MD 48 mi49 min ENE 4.1 G 7
SLIM2 - 8577330 - Solomons Island, MD 48 mi49 min NE 4.1 G 7 44°F 52°F1030.8 hPa (+1.0)

Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
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G8
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stafford, Stafford Regional Airport, VA6 mi54 minE 310.00 miFair42°F30°F63%1032.5 hPa
Quantico Marine Corps Airfield - Turner Field, VA7 mi1.9 hrsENE 1110.00 miFair47°F33°F59%1031.5 hPa
Fredericksburg, Shannon Airport, VA12 mi74 minN 010.00 miFair44°F32°F64%1031.2 hPa
Warrenton-Fauquier Airport, VA22 mi74 minNNE 410.00 miFair40°F25°F58%1030.8 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA23 mi53 minN 010.00 miFair31°F27°F85%1032.7 hPa
Fort Belvoir, VA23 mi1.9 hrsN 010.00 miFair42°F26°F54%1031.5 hPa

Wind History from RMN (wind in knots)
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Last 24hrCalmW6NW8NW15
G20
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G24
NW17
G21
NW13
G22
W5NW8
G17
NW9
G19
NW8
G14
NW13
G18
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G21
NW8N6N7NW4NW3CalmNW3N7N5E5NE3
1 day agoCalmW3CalmCalmCalmW4NW20
G28
W14
G19
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G28
W17
G26
NW15
G22
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G25
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G29
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NW7CalmNW4CalmW3NW3N4N4
2 days agoCalmCalmCalmNW3CalmCalmS8S7S5S8W6CalmE4E8E9E6E5E5E3E3CalmCalmNW9N5

Tide / Current Tables for Aquia Creek, Virginia
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Aquia Creek
Click for Map
Sat -- 12:57 AM EDT     Moonset
Sat -- 05:00 AM EDT     0.07 feet Low Tide
Sat -- 06:25 AM EDT     Sunrise
Sat -- 10:55 AM EDT     1.39 feet High Tide
Sat -- 11:05 AM EDT     Moonrise
Sat -- 05:52 PM EDT     -0.02 feet Low Tide
Sat -- 07:51 PM EDT     Sunset
Sat -- 11:33 PM EDT     1.00 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.60.40.30.20.10.20.50.91.21.31.41.310.70.50.30.1-00.10.40.70.91

Tide / Current Tables for Quantico Creek, Virginia
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Quantico Creek
Click for Map
Sat -- 12:57 AM EDT     Moonset
Sat -- 05:31 AM EDT     0.19 feet Low Tide
Sat -- 06:24 AM EDT     Sunrise
Sat -- 11:05 AM EDT     Moonrise
Sat -- 11:41 AM EDT     1.74 feet High Tide
Sat -- 06:34 PM EDT     0.13 feet Low Tide
Sat -- 07:51 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.310.60.40.20.20.30.71.11.51.71.71.51.20.90.60.30.20.10.30.71.11.3

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 (5,6,7,8)
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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.