Monday, November12, 2018 L-36.com


Marine Weather and Tides
Dundalk, MD

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 6:45AMSunset 4:54PM Monday November 12, 2018 7:07 PM EST (00:07 UTC) Moonrise 11:13AMMoonset 9:04PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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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ANZ538 Patapsco River Including Baltimore Harbor- 637 Pm Est Mon Nov 12 2018
.small craft advisory in effect from 6 am est Tuesday through late Tuesday night...
Tonight..NE winds 5 to 10 kt. Waves 1 ft. Rain. Patchy fog. Vsby 1 to 3 nm.
Tue..NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. A chance of showers. Patchy fog. Vsby 1 to 3 nm.
Tue night..NW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
Wed..NW winds 10 kt with gusts to 20 kt. Waves 1 ft.
Wed night..NE winds 5 to 10 kt. Waves 1 ft.
Thu..NE winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. Rain.
Thu night..NE winds 10 kt with gusts to 20 kt. Waves 1 ft. Rain.
Fri..W winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the morning.
Sat..NW winds 5 to 10 kt. Waves 1 ft.
ANZ500 637 Pm Est Mon Nov 12 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will cross the waters tonight into Tuesday, with a cold front slated to pass through Tuesday night. High pressure will then take hold through Wednesday night ahead of another low pressure system likely to impact the waters late Thursday into Friday. Small craft advisories will may be needed for portions of Wednesday into Thursday.


7 Day Forecast for Marine Location Near Dundalk, MD
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location: 39.25, -76.47     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 122007
afdlwx
area forecast discussion
national weather service baltimore md washington dc
307 pm est Mon nov 12 2018

Synopsis
Low pressure will move toward the mid-atlantic tonight into
early Tuesday. A cold front will pass through the area late
Tuesday with high pressure returning on Wednesday. Low pressure
will likely impact the area Thursday and Thursday night before
shifting to the northeast on Friday. High pressure likely to
return next weekend.

Near term through Tuesday
Clouds continue to thicken this afternoon ahead of a low
pressure system along the gulf coast. Temperatures are holding in
the 40s, topping 50 in a few spots near and east of i-95. Dew
points are still in the 20s west of the blue ridge and mid 30s
to the east, so the approaching shield of rain will initially be
light as it saturates the column. Suppose there could be a few
sleet pellets at precip onset, mainly west of the blue ridge.

One other remote possibility over the highlands this evening is
a brief period of freezing rain as wetbulb processes cause
temperatures to drop. However, even if air temperatures did
briefly dip to 32, would not think there would be any impact
since surfaces are warm and there are no processes (e.G.,
surface cold advection) to maintain temperatures AOB 32. Hot
springs va demonstrated this trend, dropping to 33 at precip
onset then rising to 37.

A secondary area of low pressure will form along the coastal
front in the carolinas tonight before lifting north of the area
Tuesday morning. A low level jet will provide additional forcing
for widespread moderate to locally heavy rainfall. The steadier
rain will begin to taper off late tonight into Tuesday morning.

Areal average rain totals should range between 0.50 and 1.50
inches, highest in the southeast. Flooding should not be a
significant issue, but can't totally rule out some urban and
poor drainage problems. Low temperatures will range from the
mid 30s to mid 40s.

A cold front trailing canadian low pressure will pass through
during the day Tuesday and scour out lower clouds and any
lingering drizzle. However, the frontal zone trough axis aloft
will be slow to push to the southeast, and the area will be
located under the right rear quadrant of the upper jet. So the
chance for showers will remain, and a band of steadier rain may
develop from charlottesville to southern maryland. Upslope
precipitation west of the allegheny front will also continue and
eventually change to snow as cold advection commences. However,
a lot of the saturated layer is warmer than
-10c and the QPF will be light, so less than an inch of
accumulation is expected. In the lower elevations, highs will
range from the mid 40s to mid 50s.

Short term Tuesday night through Wednesday night
High pressure will build in from the west Tuesday night and pass
off to the north on Wednesday. The weather will be dry, but the
jet stream will likely lead to some high clouds. Lows will fall
below freezing in many spots Tuesday night, followed by highs in
the 40s on Wednesday.

Upper level trough over the mississippi valley will lead to
cyclogenesis to our southwest, with moisture spreading toward
our area Wednesday night. High pressure will remain in place to
our north, forming a cold air damming pattern. The high is also
cold and dry -- dew points are expected to be in the teens and
20s to start the night. Temperatures will likely fall below
freezing for much of the area, especially west of i-95. The
biggest question about this system at the moment is the timing.

An earlier start time to the precipitation would likely mean
more potential for wintry weather (and ensuing impacts). Have
used a blend of guidance for pops for now, which keeps things in
the chance category until 12z. Regardless of timing, guidance
indicates a warm layer aloft, so all precipitation types could
be in play since temperatures will be cold to start the day.

Additional thoughts continue in the next section.

Long term Thursday through Monday
A developing low pressure system will move up the east coast
Thursday into Thursday night. Rain, moderate to heavy at times, will
overspread the region from south to north. At the onset, some areas
in the northern half and interior shenandoah valley and virginia
piedmont of our CWA could experience a wintry mix of sleet and snow
or sleet and freezing rain. This could especially be true if the
precipitation comes in early, particularly early to mid-morning,
rather than mid-afternoon. Models, such as the euro and the gfs
bring the leading edge of the precipitation into northern virginia
and eastern west virginia an hour or two after sunrise Thursday.

This scenario would allow for a mix of sleet and some freezing rain.

There should be a layer of warmer air a few thousand feet thick
above the boundary layer poke in from the southwest. Therefore, the
snow factor for a large part of northern virginia and eastern west
virginia should be low in confidence, if not any. The NAM model
brings the leading edge of the precipitation into the same zones
around mid-afternoon. This scenario would result in many rain across
most of our CWA Thursday, except for higher elevations like the blue
ridge and ridges of western maryland and eastern west virginia. We
have a few more model runs to decide on where and when any wintry
precipitation will occur this Thursday into Thursday evening. In the
meantime, it is best to be prepared for a little wintry mix in most
area, especially along and south and west of u.S. 15 from the
mason- dixon line to orange county in virginia.

As most areas transition from a soaking rain or wintry mix over to
areas of drizzle or intermittent rain or snow showers Thursday
night, the main coastal low pressure system will depart off of the
east coast by Friday. Colder and drier air will be usher in on a
building area of high pressure during the period of late Friday
through Saturday.

A storm system over western quebec canada will move east into the
maritimes and bring an arctic front southeastward across the eastern
great lakes into the mid-atlantic Saturday night and Sunday. A
reinforcing area of high pressure will push the arctic front
southward and usher in cold air into our region on Sunday. The
reinforcing surge will just guarantee our below average temperatures
Saturday night and Sunday.

Below to well below average temperatures throughout the extended
forecast. Highs Thursday will range from the lower 30s in the west
to near 40 in metro d.C. To near 50 in southern maryland. These
temperatures are a result of cold air in place, cloud cover and
wintry mix or rain arriving during the day. Highs Friday and
Saturday will range from the upper 30s in the west to near 50 in
metro d.C. To the middle 50s in southern maryland. Chilly high
pressure will be the cause of these temperatures. Reinforcing high
pressure will only allow high temperatures to reach the middle 30s
in the west, the middle 40s in metro d.C. And the lower 50s in
southern maryland for Sunday.

Aviation 20z Monday through Saturday
Light winds andVFR CIGS expected through most of the afternoon.

Rain is moving northward ahead of a low pressure system this
afternoon. Rain will initially be light as the column saturates
but will become moderate to locally heavy this evening into a
good portions of the night, which will likely reduce visibility
below 3 sm. CIGS will gradually lower but may make a fairly
quick transition to ifr during the evening. Lifr conditions are
possible overnight. Conditions will improve sometime midday
Tuesday as rain ends and winds pick up from the nw.

Vfr conditions are expected Tuesday night and Wednesday under
building high pressure.

As the next low pressure system approaches, ifr to lifr
conditions for CIGS and vis Thursday (if not late Wednesday
night) into Thursday night. Winds northeast 5 to 10 knots
Thursday, becoming northwest around 10 knots Thursday night.VFR
conditions developing Friday into Friday night. Winds northwest
10 to 15 knots gusts 20 knots Friday, becoming west- northwest
around 10 knots Friday night.

Marine
Light southeast flow is expected into the early part of the
evening. SCA conditions are expected to develop late tonight
across the southern waters and spreading northward Tuesday as
low pressure moves off the mid atlantic coast. Visibility could
be reduced in moderate to heavy rain. After a cold front passes
Tuesday, the SCA expands to all waters Tuesday afternoon and
night. Gales still look unlikely. A brief lull is expected
Wednesday afternoon with high pressure nearby before winds pick
up again Wednesday night ahead of the next low pressure system.

Small craft advisories likely Thursday. Winds northeast to east 10
to 15 knots gusts 20 knots. Small craft advisories possible Thursday
evening. Winds becoming northerly around 10 knots with gusts 15 to
20 knots. No marine hazards expected overnight Thursday. Winds
becoming northwest 5 to 10 knots. Small craft advisories possible
Friday and Friday night. Winds northwest 10 to 15 knots gusts up to
20 knots.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 6 am Tuesday to 6 am est Wednesday
for anz530>532-538>540-542.

Small craft advisory from 10 pm this evening to 6 am est
Wednesday for anz534-537-543.

Small craft advisory from 2 am Tuesday to 6 am est Wednesday
for anz533-541.

Small craft advisory from 11 am Tuesday to 6 am est Wednesday
for anz535-536.

Synopsis... Ads
near term... Ads
short term... Ads
long term... Klw
aviation... Ads klw
marine... Ads klw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 4 mi38 min E 6 G 7 46°F 1026.9 hPa
FSNM2 4 mi38 min ESE 7 G 8 46°F 1026.3 hPa
BLTM2 - 8574680 - Baltimore, MD 6 mi38 min SE 6 G 7 47°F 55°F1026.5 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 12 mi38 min SE 1 G 1.9 45°F 51°F1027.1 hPa
CPVM2 18 mi38 min 47°F 33°F
APAM2 - 8575512 - Annapolis, MD 18 mi38 min 47°F 1026.5 hPa
44063 - Annapolis 19 mi32 min SE 5.8 G 7.8 47°F 53°F1027.4 hPa
TPLM2 - Thomas Point, MD 24 mi128 min E 2.9 G 5.1 48°F 53°F1028.4 hPa (+0.3)34°F
BSLM2 - Chesapeake Bay, MD 35 mi98 min E 1.9 46°F 1027 hPa40°F
WASD2 - 8594900 - Washington, DC 39 mi38 min SE 1.9 G 5.1 45°F 53°F1027.2 hPa
CHCM2 - 8573927 - Chesapeake City, MD 40 mi38 min SE 1 G 1.9 44°F 49°F1027.2 hPa
44062 - Gooses Reef, MD 48 mi48 min 47°F 1027.2 hPa

Wind History for Francis Scott Key Bridge NE Tower, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore / Martin, MD7 mi2.4 hrsN 010.00 miMostly Cloudy46°F37°F71%1028.1 hPa
Baltimore, Inner Harbor, MD8 mi74 minno data mi47°F35°F63%1026.8 hPa
Baltimore, Baltimore-Washington International Airport, MD11 mi74 minE 610.00 miLight Rain45°F37°F77%1026.5 hPa
Fort Meade / Tipton, MD19 mi2.1 hrsN 010.00 miMostly Cloudy45°F35°F71%1028.4 hPa
Annapolis, United States Naval Academy, MD19 mi74 minE 48.00 miLight Rain49°F37°F64%1027.2 hPa
Bay Bridge Field, MD20 mi88 minE 310.00 miLight Rain46°F33°F62%1027.4 hPa

Wind History from MTN (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmW3CalmNW3CalmCalmCalmCalmCalmCalmCalmSE5E5SE4SE3CalmCalmCalmE3
1 day agoW10W10W9W5W4SW4W8W5SW4W5W5W4W5W6W6W3S3SE4S7S4SE9S7S5S3
2 days agoNW3W3W6SW4W5W8W10
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Tide / Current Tables for Fort Carroll, Patapsco River, Maryland
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Mon -- 02:25 AM EST     -0.99 knots Max Ebb
Mon -- 06:09 AM EST     0.00 knots Slack
Mon -- 06:44 AM EST     Sunrise
Mon -- 08:44 AM EST     0.52 knots Max Flood
Mon -- 11:11 AM EST     Moonrise
Mon -- 11:35 AM EST     -0.00 knots Slack
Mon -- 02:15 PM EST     -0.46 knots Max Ebb
Mon -- 04:45 PM EST     0.00 knots Slack
Mon -- 04:53 PM EST     Sunset
Mon -- 08:25 PM EST     0.89 knots Max Flood
Mon -- 09:04 PM EST     Moonset
Mon -- 11:46 PM EST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.8-1-1-0.8-0.4-0.10.30.50.50.40.2-0.1-0.3-0.5-0.4-0.20.10.40.70.90.90.70.3

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 (19,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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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.