Thursday, December13, 2018 L-36.com


Marine Weather and Tides
Edgemere, 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 7:16AMSunset 4:45PM Thursday December 13, 2018 3:06 AM EST (08:06 UTC) Moonrise 11:43AMMoonset 10:35PM Illumination 32% 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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ANZ538 Patapsco River Including Baltimore Harbor- 1236 Am Est Thu Dec 13 2018
Overnight..SE winds 5 kt. Waves less than 1 ft.
Thu..SE winds 5 kt. Waves less than 1 ft.
Thu night..NE winds 5 kt. Waves flat.
Fri..E winds 5 kt. Waves flat. Rain.
Fri night..E winds 5 to 10 kt. Waves 1 ft. Rain.
Sat..NE winds 5 to 10 kt. Waves 1 ft. Showers.
Sat night..NE winds 5 to 10 kt. Waves 1 ft. Showers likely.
Sun..N winds 5 kt. Waves less than 1 ft. Showers likely through the day.
Mon..NW winds 5 to 10 kt. Waves 1 to 2 ft.
ANZ500 1236 Am Est Thu Dec 13 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure over new england will slide off the coast tonight. Low pressure near the arklatex region will travel through the tennessee valley on Friday, nearing the waters Friday night into Saturday, bringing unsettled weather. Conditions will remain unsettled into Sunday before high pressure builds over the waters early next week. Small craft advisory conditions likely for portions of the waters Friday night and into Saturday. Small craft advisory conditions will be possible Sunday and Sunday night.


7 Day Forecast for Marine Location Near Edgemere, MD
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location: 39.19, -76.47     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 130224
afdlwx
area forecast discussion
national weather service baltimore md washington dc
924 pm est Wed dec 12 2018

Synopsis
High pressure will linger over the region through Thursday
night. A large area of low pressure will impact the area at the
end of the week bringing widespread rain and potential for
flooding.

Near term until 6 am Thursday morning
Closed off upper-level low pressure over the great lakes this
evening will track into upstate new york and pennsylvania
overnight. Weak surface low pressure is associated with this
system, and this will cause a brief period of warm advection
overnight. The deeper isentropic lift should remain to our north
so most of the precipitation is expected to stay to our north as
well. However, there can be a brief period of light
precipitation for a 1-2 hour period overnight as this system
passes by to our north. Will continue with chance pops, because
confidence is lowered by the low-level dry air in place and the
fact that the dynamics will be to our north. The best chance for
a period of light precipitation will be across the eastern
panhandle of west virginia, extreme northern virginia and
northern maryland overnight... But again even across these areas
confidence is low. Temperatures will be marginally cold enough
for a light wintry mix due to radiational cooling ahead of it
and evaporative cooling should precip take place. A few
locations will be near the freezing mark, but the cloud cover
should keep most areas slightly above freezing. Therefore, there
is a slight chance for isolated slippery spots overnight across
the north, but as of now it is expected that most areas should
be ok. Will continue to monitor this overnight.

For the rest of the area, dry conditions will persist overnight
with just a period of clouds and seasonably chilly conditions.

The one exception will be along and west of the allegheny
front, where an upslope component may lead to a period of light
snow or perhaps even a light wintry mix. Any accumulations
should be light across these areas. Min temps will range from
the mid and upper 20s to lower 30s for most areas, but middle
30s in downtown washington and baltimore.

Short term 6 am Thursday morning through Friday night
No precip expected Thu and Thu evening as area remains in
subsidence area behind departing shortwave-trough, although lots
of clouds will likely remain.

Low level moisture will start increasing again late Thu night
as deep layered flow increases from the south. Guidance continue
to hold precip after 12z Fri and in most cases after 15z. By,
then it is likely that sfc temps would have risen above freezing
with just plain rain for all. Rain becomes moderate to heavy by
evening and continues into Sat morning. Guidance have trended a
little lower with rainfall amounts, but flooding threat still
exists given unreceptive soils and snow melt across the southern
cwa. Highest rainfall amounts are expected across the south and
east of the blue ridge mtns. Will continue to monitor trends
next 24 hrs to see whether a flood watch may be required or not.

Long term Saturday through Wednesday
The heaviest rain should be moving out of the area by Saturday
morning, as the initial wave of low pressure moves offshore.

However, another area of low pressure lingers to our south on
Saturday. High pressure to the north will keep surface winds out of
north, while mid level winds will be out of the east. This will
allow for some overrunning precipitation throughout the day on
Saturday. Not expecting a washout, but some light rain or showers
are possible on Saturday. Temperatures will range from the upper 40s
to mid 50s across the region. This system will slowly move to our
south Saturday night into Sunday, and then should move offshore by
Sunday afternoon evening. This will keep a chance for showers in the
forecast across the region early Sunday, with decreasing rain
chances into Sunday evening. With cold high pressure to the north,
temperatures may be cooler Sunday, with highs only in the low to mid
40s, which is right around normal for mid-december.

High pressure will build in from the west Sunday night into early
next week. The high likely won't be centered over the region until
around mid-week. So, northerly flow will be dominant on Monday and
Tuesday. So, although dry, temperatures will remain in the low to
mid 40s.

A warm-up looks possible by the middle of the week, as high pressure
shifts offshore ahead of an approaching cold front.

Aviation 01z Thursday through Monday
A very brief period of wintry precipitation is possible near
kmrb between 4 and 6z, but confidence is low at this time.

Otherwise,VFR conditions expected through 06z fri. Developing
ifr conditions early Fri morning due to low clouds and then rain
in the afternoon. Ifr CIGS likely Sat even lifr as upper low
passes to the south and showers persist.

Sub-vfr conditions likely linger Saturday and perhaps even Sunday as
complex low pressure system slowly lumbers through the region.

Showers are likely and reduced CIGS vis are possible, perhaps even
ifr at times. Conditions will likely start to improve late
Sunday.

Marine
Winds less than 10kt through fri. Possible SCA conditions fri
night into Sat in srly flow.

Winds will diminish substantially Saturday and Sunday despite low
pressure lingering over the region. Showers and reduced visibility
will continue to be a concern, however.

Climate
Rainfall totals continue to creep upward, with baltimore
setting the annual record already. Here are the current rankings
for wettest year on record (through december 11th):
washington dc area (dca)
1. 61.33 inches (1889)
2. 60.83 inches (2003)
3. 60.78 inches (2018)
4. 60.09 inches (1878)
weather records for the washington dc area have been kept at
what is now ronald reagan washington national airport (dca)
since 1945. Precipitation records observed downtown extend the
period of record back to 1871.

Baltimore md area (bwi)
1. 65.67 inches (2018)
2. 62.66 inches (2003)
weather records for the baltimore md area have been kept at
what is now baltimore-washington international thurgood marshall
airport (bwi) since 1950. Precipitation records observed
downtown extend the period of record back to 1871.

Dulles va area (iad)
1. 65.67 inches (2003)
2. 61.30 inches (2018)
3. 59.05 inches (1972)
weather records have been kept at what is now washington dulles
international airport (iad) since 1960.

Note: all climate data are considered preliminary until
reviewed by the national centers for environmental information
(ncei).

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Synopsis... Lfr
near term... Bjl lfr
short term... Lfr
long term... Cjl
aviation... Bjl lfr cjl
marine... Bjl lfr cjl
climate... Lwx


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FSNM2 4 mi43 min SE 9.9 G 11 39°F 1022.6 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 4 mi37 min ESE 9.9 G 11 39°F 1023.1 hPa
BLTM2 - 8574680 - Baltimore, MD 8 mi37 min SE 5.1 G 7 1022.8 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 12 mi37 min SE 6 G 9.9 39°F 40°F1023.5 hPa
APAM2 - 8575512 - Annapolis, MD 14 mi37 min 40°F 1022.9 hPa
CPVM2 14 mi37 min 41°F 36°F
TPLM2 - Thomas Point, MD 20 mi67 min SE 15 G 16 40°F 41°F1023.4 hPa (-0.3)36°F
BSLM2 - Chesapeake Bay, MD 31 mi97 min SSE 5.1 37°F 1022 hPa32°F
WASD2 - 8594900 - Washington, DC 37 mi37 min SE 4.1 G 5.1 40°F 40°F1022.8 hPa
CHCM2 - 8573927 - Chesapeake City, MD 42 mi37 min SE 1.9 G 2.9 34°F 39°F1024.6 hPa
CA2 - 8571892 - Cambridge, MD 48 mi43 min 38°F 40°F1023.9 hPa

Wind History for Francis Scott Key Bridge, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore, Inner Harbor, MD10 mi73 minno data mi40°F30°F70%1023 hPa
Baltimore / Martin, MD11 mi85 minENE 310.00 miMostly Cloudy37°F32°F81%1023.7 hPa
Baltimore, Baltimore-Washington International Airport, MD11 mi73 minNNE 310.00 miOvercast37°F30°F79%1022.7 hPa
Annapolis, United States Naval Academy, MD15 mi73 minSE 88.00 miOvercast43°F35°F74%1022.8 hPa
Bay Bridge Field, MD17 mi87 minSSE 810.00 miOvercast39°F33°F81%1023 hPa
Fort Meade / Tipton, MD17 mi85 minN 010.00 miOvercast36°F30°F81%1023.4 hPa

Wind History from DMH (wind in knots)
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Last 24hr------------------------------------------------
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for North Point, Maryland
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North Point
Click for Map
Thu -- 05:25 AM EST     0.11 feet Low Tide
Thu -- 07:16 AM EST     Sunrise
Thu -- 10:38 AM EST     0.70 feet High Tide
Thu -- 11:42 AM EST     Moonrise
Thu -- 04:19 PM EST     0.04 feet Low Tide
Thu -- 04:43 PM EST     Sunset
Thu -- 10:35 PM EST     Moonset
Thu -- 11:00 PM EST     1.09 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.80.60.40.20.10.10.20.40.60.70.70.60.40.30.100.10.20.40.60.811.1

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
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Thu -- 03:24 AM EST     -0.91 knots Max Ebb
Thu -- 07:03 AM EST     0.00 knots Slack
Thu -- 07:15 AM EST     Sunrise
Thu -- 09:56 AM EST     0.60 knots Max Flood
Thu -- 11:42 AM EST     Moonrise
Thu -- 01:09 PM EST     -0.00 knots Slack
Thu -- 03:40 PM EST     -0.40 knots Max Ebb
Thu -- 04:43 PM EST     Sunset
Thu -- 06:09 PM EST     0.00 knots Slack
Thu -- 09:33 PM EST     0.67 knots Max Flood
Thu -- 10:35 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0-0.4-0.7-0.9-0.9-0.7-0.4-00.30.50.60.50.30-0.2-0.4-0.4-0.3-00.20.50.60.70.5

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 (3,6,7,8)
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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.