Friday, May24, 2019 L-36.com


Marine Weather and Tides
Colonial Beach, 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 5:47AMSunset 8:21PM Friday May 24, 2019 12:49 PM EDT (16:49 UTC) Moonrise 12:00AMMoonset 9:49AM Illumination 69% 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- 1035 Am Edt Fri May 24 2019
.small craft advisory in effect until 8 pm edt this evening...
Rest of today..NW winds 10 kt with gusts to 20 kt. Waves 1 ft.
Tonight..NE winds 5 to 10 kt. Waves 1 ft.
Sat..SE winds 5 to 10 kt. Waves 1 ft.
Sat night..S winds 5 to 10 kt. Waves 1 ft.
Sun..W winds 5 kt. Waves less than 1 ft.
Sun night..NW winds 5 kt. Waves less than 1 ft. A chance of showers.
Mon..E winds 5 kt. Waves less than 1 ft.
Tue..SW winds 5 to 10 kt. Waves 1 ft.
ANZ500 1035 Am Edt Fri May 24 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will settle over southern virginia through 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 Colonial Beach, VA
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location: 38.25, -76.96     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 241329
afdlwx
area forecast discussion
national weather service baltimore md washington dc
929 am edt Fri may 24 2019

Synopsis
A cold front will drift southward into southern virginia through
this afternoon. 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
A weak cold front is located over central virginia this morning
and that boundary will slowly build south through this
afternoon. A downsloping flow along with sunshine will cause
more warm conditions, but it will be noticeably less humid with
dewpoints in the 50s for most locations with perhaps 60s toward
central virginia. MAX temps will be in the lower to middle 80s
for most areas. A deep mixing layer will allow for breezy
conditions today as well with wind gusts around 20 to 30 mph.

High pressure centered over the great lakes this morning will
transit overhead tonight, turning winds light and northerly,
while delivering dry conditions with 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 14z Friday through Tuesday
Drier air behind a cold front 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
Gusty northwest winds will take hold behind a cold front today.

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 until 8 pm edt this evening for
anz530>543.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCDV2 6 mi37 min NW 8.9 G 15 80°F 72°F1016.1 hPa
PPTM2 - 8578240 - Piney Point, MD 24 mi37 min NW 14 G 15
SLIM2 - 8577330 - Solomons Island, MD 27 mi31 min NNW 11 G 22 76°F 69°F1016.3 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 32 mi31 min NNW 21 G 27 75°F 1017.3 hPa
LWTV2 - 8635750 - Lewisetta, VA 32 mi37 min NNW 11 G 15 78°F 69°F1016.7 hPa
44042 - Potomac, MD 36 mi43 min WNW 14 G 16 74°F 70°F1015.6 hPa
44062 - Gooses Reef, MD 36 mi55 min N 12 G 14 72°F 1017.1 hPa
WASD2 - 8594900 - Washington, DC 43 mi37 min NW 8.9 G 21 76°F 70°F1017.8 hPa
BISM2 - 8571421 - Bishops Head, MD 49 mi37 min NW 17 G 21 76°F 75°F1017 hPa

Wind History for Piney Point, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD22 mi67 minWNW 9 G 1610.00 miFair79°F53°F42%1016.9 hPa

Wind History from 2W6 (wind in knots)
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SW4SW4CalmCalmCalmSW5SW6SW6SW5SW4SW5W4W5W4NW6NW7NW9
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N4N6N4NE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE3NE4E4E5SE6E4

Tide / Current Tables for Colonial Beach, Potomac River, Virginia (2)
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Colonial Beach
Click for Map
Fri -- 12:43 AM EDT     Moonrise
Fri -- 01:10 AM EDT     0.33 feet Low Tide
Fri -- 05:50 AM EDT     Sunrise
Fri -- 07:26 AM EDT     1.79 feet High Tide
Fri -- 10:49 AM EDT     Moonset
Fri -- 01:59 PM EDT     0.27 feet Low Tide
Fri -- 08:13 PM EDT     1.67 feet High Tide
Fri -- 08:19 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.40.611.41.71.81.81.51.20.80.60.40.30.40.711.41.61.71.61.31

Tide / Current Tables for Broomes Island, 0.4 mile south of, Maryland Current
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Broomes Island
Click for MapFlood direction 290 true
Ebb direction 110 true

Fri -- 12:42 AM EDT     Moonrise
Fri -- 01:16 AM EDT     0.00 knots Slack
Fri -- 04:39 AM EDT     0.42 knots Max Flood
Fri -- 05:48 AM EDT     Sunrise
Fri -- 08:10 AM EDT     -0.00 knots Slack
Fri -- 10:47 AM EDT     Moonset
Fri -- 11:40 AM EDT     -0.56 knots Max Ebb
Fri -- 03:23 PM EDT     0.00 knots Slack
Fri -- 05:55 PM EDT     0.28 knots Max Flood
Fri -- 08:18 PM EDT     Sunset
Fri -- 09:16 PM EDT     -0.00 knots Slack
Fri -- 11:48 PM EDT     -0.24 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-00.10.30.40.40.30.20-0.2-0.4-0.5-0.6-0.5-0.3-0.10.10.20.30.20.20-0.1-0.2

Weather Map and Satellite Images
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wmap_A
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 (12,3,4,5)
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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.