Friday, December6, 2019
Privacy Policy
L-36.com


Marine Weather and Tides
Colonial Beach, VA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:09AMSunset 4:47PM Friday December 6, 2019 12:42 PM EST (17:42 UTC) Moonrise 1:59PMMoonset 1:28AM Illumination 73% 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
    EDIT      (on/off)   Help
ANZ536 Tidal Potomac From Indian Head To Cobb Island- 638 Am Est Fri Dec 6 2019
.small craft advisory in effect from noon est today through late tonight...
Today..S winds 5 to 10 kt...becoming sw 10 to 15 kt with gusts to 20 kt this afternoon. Waves 1 ft. Scattered sprinkles this afternoon.
Tonight..NW winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 ft.
Sat..N winds 5 to 10 kt. Waves 1 ft.
Sat night..E winds around 5 kt. Waves 1 ft or less.
Sun..S winds around 5 kt. Waves 1 ft.
Sun night..S winds around 5 kt. Waves 1 ft. Showers likely.
Mon..SW winds 5 to 10 kt. Waves 1 ft. Showers likely.
Tue..NW winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers through the night.
ANZ500 638 Am Est Fri Dec 6 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will move offshore of the carolinas today. A cold front will push southeast across the area by this evening. High pressure will follow for the weekend, before a stronger area of low pressure develops over the mid-mississippi valley and tracks northeastward toward the eastern great lakes early next week. Small craft advisories may be needed Monday night through Tuesday.


7 Day Forecast for Marine Location Near Colonial Beach, VA
   Hourly   EDIT   Help
location: 38.25, -76.96     debug


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KLWX 061517 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 1017 AM EST Fri Dec 6 2019

SYNOPSIS. High pressure will move offshore from the Carolinas today. A cold front will cross the area this evening. High pressure will follow for the weekend, before a stronger area of low pressure develops over the Mid-Mississippi Valley and tracks northeastward toward the eastern Great Lakes early next week.

NEAR TERM /THROUGH TONIGHT/. With shortwaves passing to our north and south today, it appears as though most of the synoptic scale forcing for ascent will avoid our area. As a result, not expecting much precipitation east of the Appalachians. However, recent runs of the HRRR suggest that some showers may develop across northeast MD late this afternoon into early this evening within the right entrance region of the upper jet. As a result, POPs have been upped slightly across northeast MD.

Previous discussion . High pressure is situated along the southeastern coast this morning, and areas of low pressure are over Michigan and the Arklatex, connected by a cold front. An area of mountain wave cirrus developed last evening and has slowly been eroding, although any clear skies will be replaced by mid/high clouds advancing ahead of the next system.

Moisture ahead of the southern low will intersect the Appalachians by this afternoon, but westerly (downsloping) flow at 850 mb and above will likely mean precipitation will be focused along the Appalachian crest. Warm advection will result in temperatures in the upper 40s to mid 50s, and even on the ridgetops, temperatures should be well above freezing with most of the precipitation being rain. As the cold front sinks southeastward across the area late this afternoon and evening, a few very light showers could be found along it. Used sprinkle wording east of the mountains since the chance of measurable precipitation looks very low in the lowlands.

As cold air advances behind the front, precipitation could end as a little snow on the Allegheny Front. There also could be freezing drizzle as inversion heights crash, but it would be a very brief window and thus didn't put it in the forecast. Skies will clear late tonight with lows in the upper 20s to mid 30s.

SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/. A large/strong area of high pressure originating from Canada will quickly build east Saturday and be overhead by Saturday evening. Cold advection will result in highs in the 40s. Favorable radiational cooling on Saturday night will lead to widespread low to mid 20s, except lower 30s in the cities and by the Bay. The high will move offshore Sunday. Return flow will be offset by increasing clouds and poor mixing, with highs remaining below 50 for most.

A shortwave trough will be approaching from the nation's midsection Sunday night with low pressure developing over the mid Mississippi Valley. Moisture will stream into the area ahead of this system, and there could be additional focus of moisture along an inverted trough along the coast. Chances for rain will increase during the second half of the night. Low temperatures will be above freezing for most areas. However, some of the mountainous areas could be near freezing as the precipitation arrives, so a few pockets of wintry mix are within the realm of possibility if warm advection isn't fast/strong enough.

LONG TERM /MONDAY THROUGH THURSDAY/. High pressure will be centered over the western Atlantic on Monday. Low pressure will be moving NE from the Midwest into the Great Lakes Monday into Monday night as ir deepens. Southerly flow will advect warm and moist air into our region. This will increase the chance for showers over area for Monday.

The cold front associated to this low pressure will be approaching our region Monday night and will move across on Tuesday. Chance of showers will continue during this time and into Tuesday night. Cold air advection and residual moisture behind the front could allow for snow showers over parts of or CWA Tuesday night. Trough axis aloft will move across on Wednesday while surface high pressure starts building east and remains in control through the end of the week.

AVIATION /15Z FRIDAY THROUGH TUESDAY/. Mainly mid/high level clouds today with southwest flow ahead of an approaching cold front. There could be lower ceilings (around 5kft) and a few light showers or sprinkles as the front passes late this afternoon/early evening, but no visibility issues are expected. Winds will shift out of the northwest behind the front and could be briefly gusty to 20-25 kt.

No significant weather Saturday and Sunday with high pressure. Next weather system approaches Sunday night with lowering ceilings (possibly sub-VFR) and a chance of rain.

Chance of precipitation Monday through Tuesday night could bring sub- VFR conditions over the terminals as low pressure and cold front impact our area. Conditions should improve Wednesday when high pressure builds into our region.

MARINE. High pressure will move offshore today with southwest flow increasing. Small craft advisories, will be in effect for all waters by noon. Worth noting mixing may be poor and gusts sporadic. There could be a brief lull in winds early this evening with decoupling, but then a cold front will pass, winds will shift to the northwest and become gusty. Thus extended the advisory for all waters until 2 AM. Then winds will start diminishing from north to south through Saturday morning as high pressure builds.

Light winds expected Saturday afternoon through Sunday as high pressure builds across the area. Southerly flow may increase a bit Sunday night as the high departs, but looks to be sub- advisory at this time.

Sub-SCA conditions expected Monday into Monday night over the waters. SCA may be needed on Tuesday through Wednesday behind a cold front that will move across our area.

LWX WATCHES/WARNINGS/ADVISORIES. DC . None. MD . None. VA . None. WV . None. MARINE . Small Craft Advisory until 6 AM EST Saturday for ANZ531-538- 539. Small Craft Advisory until noon EST Saturday for ANZ533-534- 537-541>543. Small Craft Advisory until 2 AM EST Saturday for ANZ530-535- 536. Small Craft Advisory until 6 AM EST Saturday for ANZ532-540.

SYNOPSIS . ADS NEAR TERM . ADS/KJP SHORT TERM . ADS LONG TERM . IMR AVIATION . ADS/IMR MARINE . ADS/IMR/KJP


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 6 mi61 min S 6 G 8 51°F 47°F1018.6 hPa
PPTM2 - 8578240 - Piney Point, MD 24 mi55 min SW 13 G 17
SLIM2 - 8577330 - Solomons Island, MD 27 mi55 min SSW 14 G 18 52°F 47°F1019.1 hPa
LWTV2 - 8635750 - Lewisetta, VA 32 mi61 min SW 12 G 16 51°F 44°F1020.3 hPa
44042 - Potomac, MD 36 mi43 min 53°F 47°F2 ft
44062 - Gooses Reef, MD 36 mi43 min S 7.8 G 9.7 49°F 1 ft1019.9 hPa (-2.4)
BSLM2 - Chesapeake Bay, MD 39 mi133 min SE 7 44°F 1020 hPa35°F
WASD2 - 8594900 - Washington, DC 43 mi55 min SSW 8 G 9.9 48°F 44°F1019.1 hPa
BISM2 - 8571421 - Bishops Head, MD 49 mi61 min SSW 17 G 21 48°F 44°F1020.6 hPa

Wind History for Piney Point, MD
(wind in knots)    EDIT      (on/off)   Help
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
-12
PM
12
AM
-12
PM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last
24hr
NW19
G24
NW17
NW14
G17
NW12
G15
NW15
NW9
E2
--
NE2
--
SE3
SW5
S5
S5
S8
S9
S8
S11
S9
S4
SW9
SW14
1 day
ago
SW3
W6
SW8
SW7
SW7
G13
W12
G16
W8
W5
G9
W11
G14
W10
W10
G13
NW16
NW29
NW26
NW25
NW19
NW17
G21
NW21
NW20
G26
2 days
ago
NW18
G23
NW22
NW16
N13
NE3
N6
N3
NE1
NE3
N7
G10
N6
NE4
NE4
NE2
E1
NE1
--
S4
SW4
SW2
G6
SW5
G8

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD22 mi68 minSSW 8 miFair52°F26°F38%1020.3 hPa

Link to 5 minute data for K2W6

Wind History from 2W6 (wind in knots)
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
-12
PM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last 24hrW11
G17
W9
G14
W6W7CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE3S4S11
G15
S6S8
G14
1 day agoSW7SW6SW5S4NW3W5NW4W3CalmCalmCalmCalmW5W5W6
G14
W10
G16
W8
G17
W4W6W5W7W10
G21
NW9
G16
W15
G21
2 days agoW10
G17
W14
G18
NW7
G16
W6CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS4SW4SW6SW7

Tide / Current Tables for Colonial Beach, Potomac River, Virginia (2)
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Colonial Beach
Click for Map
Fri -- 01:27 AM EST     Moonset
Fri -- 03:45 AM EST     0.07 feet Low Tide
Fri -- 07:10 AM EST     Sunrise
Fri -- 10:21 AM EST     1.47 feet High Tide
Fri -- 01:58 PM EST     Moonrise
Fri -- 04:22 PM EST     0.13 feet Low Tide
Fri -- 04:47 PM EST     Sunset
Fri -- 10:45 PM EST     1.40 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
11
pm
0.90.60.30.10.10.20.50.91.21.41.51.41.20.80.50.30.10.20.40.711.21.41.4

Tide / Current Tables for Broomes Island, 0.4 mile south of, Maryland Current
   EDIT      (on/off)   Help   One Week of Data
Broomes Island
Click for MapFlood direction 290 true
Ebb direction 110 true

Fri -- 01:26 AM EST     Moonset
Fri -- 01:31 AM EST     -0.45 knots Max Ebb
Fri -- 04:43 AM EST     0.00 knots Slack
Fri -- 07:08 AM EST     Sunrise
Fri -- 07:52 AM EST     0.43 knots Max Flood
Fri -- 11:36 AM EST     -0.00 knots Slack
Fri -- 01:57 PM EST     Moonrise
Fri -- 02:32 PM EST     -0.38 knots Max Ebb
Fri -- 04:45 PM EST     Sunset
Fri -- 05:43 PM EST     0.00 knots Slack
Fri -- 08:07 PM EST     0.23 knots Max Flood
Fri -- 10:57 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
11
pm
-0.3-0.4-0.4-0.3-0.20.10.30.40.40.40.30.1-0.1-0.3-0.4-0.4-0.3-0.100.20.20.20.1-0

Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (12,3,4,5)
      (on/off)   Help

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

Ad by Google

Cookie Policy:
This webiste uses cookies to save your settings. No personal information is saved. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. I do not keep site logs longer than I need to to keep bad actors off the site. Basically, I delete them after looking at them. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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.