Saturday, February17, 2018 L-36.com


Marine Weather and Tides
Aquia Harbour, VA

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 6:55AMSunset 5:52PM Saturday February 17, 2018 10:01 PM EST (03:01 UTC) Moonrise 8:04AMMoonset 7:43PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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
    EDIT      (on/off)   Help
ANZ536 Tidal Potomac From Indian Head To Cobb Island- 933 Pm Est Sat Feb 17 2018
Rest of tonight..W winds 5 kt. Waves less than 1 ft. A chance of rain late this evening. Patchy fog with vsby 1 to 3 nm.
Sun..NW winds 5 kt. Waves less than 1 ft.
Sun night..SE winds 5 kt. Waves less than 1 ft.
Mon..S winds 5 kt. Waves less than 1 ft. A chance of rain.
Mon night..S winds 5 kt. Waves less than 1 ft.
Tue..SW winds 5 to 10 kt. Waves 1 ft.
Tue night..SW winds 5 to 10 kt. Waves 1 ft.
Wed..W winds 5 to 10 kt. Waves 1 ft. A chance of showers through the night.
Thu..NE winds 5 kt. Waves less than 1 ft. A chance of showers.
ANZ500 933 Pm Est Sat Feb 17 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A wave of low pressure will track along a cold front to our south tonight. High pressure will return for Sunday, then move offshore early next week. A warm front will move north across the waters Monday. Small craft advisories may be needed Tuesday through Wednesday.

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


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 klwx 180148
afdlwx
area forecast discussion
national weather service baltimore md washington dc
848 pm est Sat feb 17 2018

Synopsis
Low pressure will track northeastward along a stalled frontal
boundary well to our south through tonight. High pressure will
build in from the west on Sunday, migrating offshore by Monday.

Low pressure will move northeastward toward the great lakes
Monday, lifting a warm front northward through our region. A
cold front is poised to approach the region during the middle
portion of the work week.

Near term until 6 am Sunday morning
Low pressure is beginning to develop off the DELMARVA coast.

However, regional radars suggest that the main area of
precipitation moving onto the eastern shore. Rain had spread
north to dc metro prior to its ending. So, believe that the
accumulating snow has already fallen. With that in mind, have
cancelled the winter weather advisory for the shenandoah valley
and the dc metro area.

Am still watching precip tracking across pennsylvania, which
could affect northern maryland. Also, only recently has the
snow pulled away from metro baltimore. Anticipate the rest of
the advisory will be able to be dropped before midnight.

That turns the focus to the upslope potential. The best
shortwave energy will be crossing in the 06-09 utc window. That
makes for a limited opportunity for additional accumulation...

perhaps another inch or two. Considering reports to this point,
warning criteria may not be reached. However, do not have the
confidence to downgrade at this time.

Temperatures will be hovering in the lower 30s for much of the
night. Given snow and ice on the ground, slippery conditions may
be an issue, and will strongly consider a special weather
statement to cover it. Am also concerned that the snow ice on the
ground will result in fog development since there will be
little ventilating wind until dawn.

Short term 6 am Sunday morning through Monday night
High pressure quickly moves in behind the exiting low pressure
area to the northeast, resulting in a dry and clear conditions.

After a cold and perhaps icy start to the morning, temperatures
will rebound nicely, topping out in the mid 40s to lower 50s
region wide. High pressure shifts offshore Sunday night, keeping
a light return flow over the region and temperatures above
normal. Low pressure will move northeastward toward the great
lakes region on Monday, which will help lift a warm front
through our area. With warm air advection ongoing, could see
some shower activity on Monday, not a complete washout, but
definitely an increase in cloudiness. Highs Sunday Monday will
be above average, ranging in the low to mid 50s. Lows Sunday
night will likely remain above freezing, and Monday night will
remain in the upper 40s to near 50 degrees.

Long term Tuesday through Saturday
High pressure will be offshore on Tuesday with return flow well
settled over our region and an upper level ridge centered over
the SE conus. Dry and above normal temperatures are expected
Tuesday, with highs reaching the 70s for most of our cwa.

A similar scenario is expected on Wednesday before a slow moving
cold front approaches from the west. Guidance disagrees on the
timing of the front, but there seems to be a consensus between some
deterministic and ensembles that it will most likely move through
later Wednesday or early Thursday. The front will stall nearby
Thursday and into Friday which could keep the unsettled weather
through the end of the week, with cooler -but still above normal-
temperatures over our area. The front will lift as a warm front on
Saturday, continuing the chances of rain over our area.

Aviation 02z Sunday through Thursday
All precipitation has moved east of the terminals. However, low
clouds linger. Am becoming concerned that without any
ventilating wind, the clouds will remain and may be joined by
developing fog. Pretty much have status quo (ifr) in the tafs
for a couple of hours past midnight. Will need to reassess what
to do thereafter.

Vfr conditions will prevail Sunday and Sunday night. Light
winds at 10 knots or less are expected.

A warm front will lift north of the area on Monday, bringing a
threat for shower activity and the potential for episodes of
subVFR conditions.

Vfr conditions expected Tuesday and part of the day
Wednesday before sub-vfr periods possible late on Wednesday and into
Thursday when unsettled weather could affect our area.

Marine
With low pressure crossing the region through tonight, expect a
weak gradient which will keep winds below criteria threshold. Winds
will remain below advisory criteria through Monday as high
pressure traverses our region and moves offshore, delivering
light southerly winds over the waters.

Winds are expected to remain below SCA criteria on Tuesday,
even though they will be breezy. Similar conditions expected on
Wednesday, therefore no small craft advisory expected these
days. Winds will decrease on Thursday and remain below criteria.

Climate
A period of exceptional warm weather is expected Tuesday and
Wednesday. Temperatures will be approaching if not exceeding record
values. Below is a listing of record warm highs and record warm lows
for this period.

Record warm daily maximum temperatures
site Tue 2 20 Wed 2 21
dca 76 (1930) 75 (1953)
bwi 76 (1930) 74 (1930)
iad 70 (1971) 70 (1997)
record warm daily minimum temperatures
site Tue 2 20 Wed 2 21
dca 59 (1939) 51 (1954)
bwi 57 (1939) 49 (1981)
iad 46 (1981) 45 (1981)

Lwx watches warnings advisories
Dc... None.

Md... Winter weather advisory until midnight est tonight for
mdz003>006-011-014-501-502-505>508.

Va... Winter weather advisory until midnight est tonight for vaz028-
503.

Wv... Winter weather advisory until midnight est tonight for
wvz050>053-504-505.

Winter storm warning until 2 am est Sunday for wvz501-503.

Marine... None.

Synopsis... Bkf
near term... Hts
short term... Bkf
long term... Imr
aviation... Hts bkf imr
marine... Bkf imr
climate...



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 18 mi43 min SW 2.9 G 4.1 36°F 43°F1018.6 hPa
WASD2 - 8594900 - Washington, DC 36 mi43 min SW 2.9 G 4.1 35°F 41°F1019.7 hPa
SLIM2 - 8577330 - Solomons Island, MD 48 mi43 min E 2.9 G 4.1 35°F 40°F1017.8 hPa

Wind History for Washington, DC
(wind in knots)    EDIT      (on/off)   Help
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
Last
24hr
N6
G11
NW7
G11
NW9
G12
N6
G17
N4
G9
NW4
G9
N5
G9
N6
G10
N5
N4
G9
E2
G9
NE4
G8
E5
G12
S7
G11
SE6
G10
SE5
G10
SE3
G7
SE4
E3
G7
NE3
G8
SE3
SE4
S3
SW3
1 day
ago
SW8
G12
SW9
S6
G10
S6
S8
G11
N2
N4
G9
W5
W3
SE2
S4
S2
S6
S5
S6
W6
NW12
NW14
G21
NW12
G16
NW8
G12
N6
G10
N5
G13
NW11
G17
NW10
G13
2 days
ago
SW5
G10
S4
S5
S6
G9
SE3
S3
S2
S3
S2
S3
S2
S2
S4
S6
S7
S8
S7
G10
S7
S10
G13
S8
G12
S5
S5
S8
G12
S9
G14

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stafford, Stafford Regional Airport, VA6 mi66 minN 010.00 miOvercast36°F35°F100%1020.7 hPa
Quantico Marine Corps Airfield - Turner Field, VA7 mi65 minSSW 510.00 miOvercast37°F36°F96%1020 hPa
Fredericksburg, Shannon Airport, VA12 mi66 minN 010.00 miOvercast37°F36°F100%1019.3 hPa
Warrenton-Fauquier Airport, VA22 mi66 minN 03.00 miFog/Mist34°F32°F92%1019 hPa
Manassas, Manassas Regional Airport/Harry P. Davis Field, VA23 mi65 minW 45.00 miFog/Mist33°F32°F96%1020.9 hPa
Fort Belvoir, VA23 mi65 minN 010.00 miOvercast35°F32°F94%1019.7 hPa

Wind History from RMN (wind in knots)
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
Last 24hrN11
G20
N11N7CalmCalmNE4CalmNE3NE4CalmE7E7E7SE5SE4SE3NE5E7E4CalmCalmCalmSE3Calm
1 day agoSW11
G16
SW9
G15
SW8
G14
SW8
G14
SW9SW7
G16
SW9
G17
N8N8CalmCalmCalmCalmS4SW3W3CalmNW16
G21
NW13
G19
NW10N21
G28
N17
G22
NW18
G24
NW18
G22
2 days agoSW6SW6SW4S3S6SW4SW4SW4S4SW4SW4SW4SW5S4S6
G14
SW12
G20
SW9
G18
SW12
G20
SW9
G21
SW9
G21
SW8
G15
SW9
G15
SW10
G21
SW10
G16

Tide / Current Tables for Aquia Creek, Virginia
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Aquia Creek
Click for Map
Sat -- 01:06 AM EST     0.05 feet Low Tide
Sat -- 06:49 AM EST     1.25 feet High Tide
Sat -- 06:57 AM EST     Sunrise
Sat -- 08:03 AM EST     Moonrise
Sat -- 01:26 PM EST     -0.02 feet Low Tide
Sat -- 05:49 PM EST     Sunset
Sat -- 07:16 PM EST     1.27 feet High Tide
Sat -- 07:42 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.200.20.50.811.21.21.10.90.60.40.2000.30.711.21.31.210.70.5

Tide / Current Tables for Quantico Creek, Virginia
   EDIT      (on/off)   Help   One Week of Data
Quantico Creek
Click for Map
Sat -- 01:46 AM EST     -0.01 feet Low Tide
Sat -- 06:57 AM EST     Sunrise
Sat -- 07:53 AM EST     1.35 feet High Tide
Sat -- 08:03 AM EST     Moonrise
Sat -- 01:58 PM EST     -0.01 feet Low Tide
Sat -- 05:49 PM EST     Sunset
Sat -- 07:42 PM EST     Moonset
Sat -- 08:08 PM EST     1.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20-00.10.40.81.11.31.41.20.90.60.30.1-00.10.30.71.11.31.41.31.10.7

Weather Map and Satellite Images
       (on/off)   Help
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 (22,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Sterling, VA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.