Thursday, February22, 2018 L-36.com


Marine Weather and Tides
Leonard, MD

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 6:46AMSunset 5:55PM Thursday February 22, 2018 5:42 PM EST (22:42 UTC) Moonrise 10:48AMMoonset 12:00AM Illumination 52% Phase: First Quarter Moon; Moon at 8 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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ANZ542 Patuxent River To Broomes Island Md- 514 Pm Est Thu Feb 22 2018
.small craft advisory in effect until midnight est tonight... NE winds 15 kt with gusts to 20 kt. Waves 1 ft. Rain likely with patchy drizzle.
Tonight..NE winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 1 ft. Rain likely with areas of drizzle.
Fri..SE winds 5 to 10 kt. Waves 1 ft. Rain likely with areas of drizzle.
Fri night..S winds 5 to 10 kt. Waves 1 ft.
Sat..SW winds 5 to 10 kt...becoming E in the afternoon. Waves 1 ft. A chance of showers.
Sat night..SE winds 5 kt. Waves less than 1 ft. A chance of showers.
Sun..NW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Mon..NW winds 5 kt. Waves less than 1 ft. A chance of showers through the day.
ANZ500 514 Pm Est Thu Feb 22 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A front will remain stalled to the south through the end of the week before gradually returning north as a warm front during the weekend. A cold front will push east across the area on Sunday.

7 Day Forecast for Marine Location Near Leonard, MD
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location: 38.28, -76.63     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 222022
afdlwx
area forecast discussion
national weather service baltimore md washington dc
322 pm est Thu feb 22 2018

Synopsis
A stalled front across south-central virginia will return
northward as a warm front Friday. The next low pressure system
will move along the mason-dixon region late Friday and Friday
night. The low's associated cold front will drag across the
northern half of our region Saturday, before stalling then
retreating northward as a warm front by Saturday night. A
stronger cold front will push across the region Sunday. High
pressure will evolve Sunday night through Tuesday.

Near term through Friday
A stalled front lies just south of staunton, virginia to just
north of richmond, virginia. Temperatures on the north side of
the front are in the lower 50s, while temperatures on the south
side of the front are in the lower 70s. This is a big temperature
contrast. Radar imagery shows a weak line of rain showers pushing
east across our western and northern zones and extending from
highland county, virginia to carroll county, maryland. Rain amounts
are generally light with reduced visibility in areas of rain,
drizzle and fog across central and northeast maryland.

A persistent north to northeast light wind will continue into
tonight to allow for cooler air to remain in place on the north side
of the front. Additional rain showers and patchy drizzle is expected
to develop later this afternoon and tonight because of the cool air
undercutting the milder air aloft. There will be pockets of freezing
rain in parts of western maryland and northern west virginia in the
higher terrain. Current temperatures range from 33 degrees to 36
degrees in these areas, as of 230 pm, and are expected to drop to
near 30 in a couple of locations by the overnight. Ice accumulation
will be light and probably only amount to a few hundredths of
an inch, nonetheless, be cognizant of icy roads and sidewalks. If
the roads and sidewalks look wet, they are probably icy. Tonight's
low temperatures will range from the lower 30s in the northwestern
areas to the lower 40s in central virginia.

While the northern appalachian mountains will be encountering
some icy roads in spots due to freezing rain or drizzle Friday
morning, the remainder of the region will have periods of rain and
drizzle Friday as the stalled front moves north as a warm front.

Additional rain amounts will be light with slightly higher amounts
across the mason-dixon region. Highs Friday will range from the
middle 40s in the north to the middle 50s in the south.

Short term Friday night through Saturday night
A warm front will shift along our northern zones as an area of low
pressure connects to its western end and moves east Friday night.

While the rain chances decrease in our southern zones, we will
still hang on to rain chances in our northern zones as the low
pressure slides to our east.

High pressure will swing across new england Saturday into Saturday
night. An affiliated cold front with the low pressure will also
stall. Temps in the 40s and 50s are expected Saturday on the cool
side of the front but temps in the 60s and perhaps 70s are expected
on the warm side of the front. Shortwave energy will also pass
through the area... Bringing the chances for showers. The best
chance for rain will be along and north of the front.

The stationary front will be in place into Saturday night. Showers
are possible with min temps ranging from the 40s north and east of
the front to the 50s and perhaps lower 60s south of the front.

Long term Sunday through Thursday
A low pressure system will be moving northeast from the great lakes
on Sunday while its associated warm front lifts north away from our
region. A cold front will then move through on Sunday afternoon
allowing for some showers... Maybe a thunderstorm. The front will
then stall to our south on Monday, but it is unclear how close to
our CWA it will be... This may cause additional showers into Monday
for parts of our area.

A high pressure system will build on Monday into Monday night and be
overhead on Tuesday bringing dry conditions over our area. The high
pressure will then shift eastward over western atlantic waters as a
return flow settles over us. Guidance then disagrees on the
development of a low pressure system over the western gulf states
and its associated boundary. The euro keeps Wednesday conditions
dry, while gfs GEFS are bringing showers over us as early as
Wednesday afternoon as this boundary and the low pressure system
approaches us and continue into Thursday.

Temperatures will be around 20 degrees above normal on Sunday, with
high temperatures reaching the 60s and 70s. Then high temperatures
will be mainly in the 50s maybe 60s, with 40s at higher elevations
for the rest of the period.

Aviation 21z Thursday through Tuesday
A stalled front extending from the central shenandoah valley to
near richmond, virginia will linger into tonight. Milder air
will overrun surface chilly air that will result in additional
periods of rain and drizzle to develop through Friday night. Places
that are currently MVFR with low clouds and patchy fog will likely
become ifr late this afternoon and continue through Friday.

The front may lift further north Saturday and Saturday night. Most
terminals should still be on the cool side of the boundary which
means more low clouds along with areas of fog... Light rain and
drizzle. Perhaps kcho will have improving conditions with the
boundary setting up just to their north.

Sub-vfr conditions possible Sunday with a frontal boundary affecting
our area.VFR conditions should return on Monday into Tuesday with
high pressure building over us.

Marine
A stalled front just to our south will allow for persistent
light north to northeast winds through tonight. A small craft
advisory remains in effect for maryland chesapeake bay and lower
tidal potomac river through this evening.

The front will likely remain to the south through Saturday
night. As of now... It appears that the gradient will be light
enough for winds to remain below SCA criteria.

On Sunday the winds will be on the increase and come close to
criteria, so it should be monitored in case a SCA is needed. Winds
will decrease on Sunday night and remain below criteria into Tuesday.

Climate
From Wednesday february 21st the following records were broken.

For iad: a monthly record high minimum temperature of 59
degrees occurred. This breaks the old record of 55 degrees set
on february 17th 1976. The high of 80 degrees was also a monthly
record, breaking the old record of 79 degrees set on february
24th 1985 and february 25th 2000.

For dca: a daily record high minimum temperature of 56 degrees
occurred. This breaks the old record of 51 degrees set in 1954.

The high of 82 degrees was also a daily record, breaking the
old record of 75 degrees set in 1953.

For bwi: a daily record high minimum temperature of 52 degrees
occurred. This breaks the old record of 49 degrees set in 1981.

The high of 79 degrees was also a daily record, breaking the
old record of 74 degrees set in 1930.

Lwx watches warnings advisories
Dc... None.

Md... Winter weather advisory until 8 am est Friday for mdz501.

Va... None.

Wv... Winter weather advisory until 8 am est Friday for wvz501-503.

Marine... Small craft advisory until midnight est tonight for anz530>534-
537>543.

Synopsis... Klw
near term... Klw
short term... Klw
long term... Imr
aviation... Imr klw
marine... Imr klw
climate... Klw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SLIM2 - 8577330 - Solomons Island, MD 10 mi43 min NNE 9.9 G 12 48°F 44°F1031.8 hPa (+1.9)
PPTM2 - 8578240 - Piney Point, MD 11 mi43 min NE 11 G 14
COVM2 - 8577018 - Cove Point LNG Pier, MD 15 mi43 min NE 15 G 17 46°F 1032.6 hPa (+1.8)
44062 - Gooses Reef, MD 22 mi33 min ENE 14 G 16 45°F 1032.8 hPa
NCDV2 22 mi43 min N 4.1 G 7 51°F 49°F1031.6 hPa (+2.5)
LWTV2 - 8635750 - Lewisetta, VA 22 mi43 min NE 8 G 11 48°F 51°F1031.5 hPa (+1.7)
44042 - Potomac, MD 23 mi33 min W 14 G 16 46°F 1030.9 hPa
BISM2 - 8571421 - Bishops Head, MD 32 mi43 min NNE 15 G 19 47°F 52°F1031.9 hPa (+1.7)
BSLM2 - Chesapeake Bay, MD 35 mi133 min NNE 4.1 49°F 1032 hPa46°F
CA2 - 8571892 - Cambridge, MD 36 mi43 min 47°F 49°F1033.5 hPa (+2.3)
TPLM2 - Thomas Point, MD 44 mi43 min NE 9.9 G 9.9 45°F 42°F
WASD2 - 8594900 - Washington, DC 46 mi43 min NNE 6 G 9.9 49°F 47°F1033.5 hPa (+3.5)
APAM2 - 8575512 - Annapolis, MD 49 mi43 min 45°F 1033.6 hPa (+3.2)

Wind History for Solomons Island, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD5 mi66 minNNE 67.00 miOvercast46°F44°F93%1032.2 hPa
Patuxent River, Naval Air Station, MD12 mi51 minN 136.00 miFog/Mist48°F46°F96%1031.8 hPa
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD14 mi50 minN 85.00 miFog/Mist49°F46°F93%1031.2 hPa

Wind History from 2W6 (wind in knots)
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Last 24hrS5SW8SW6SW6SW5SW7SW6SW3CalmCalmCalmCalmCalmNE3CalmNE3E5E5E5E4CalmN3N3NE3
1 day agoS5S6S5S4SW5SW6SW8SW6SW7SW9SW7SW8SW9SW9SW8SW10SW10
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2 days agoCalmS5SW5S4S5SW4SW6SW4SW7SW9SW9SW5SW5SW7SW6SW7SW9
G14
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SW10SW6S7S7S6

Tide / Current Tables for Leonardtown, Breton Bay, Potomac River, Maryland
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Leonardtown
Click for Map
Thu -- 12:21 AM EST     -0.02 feet Low Tide
Thu -- 06:34 AM EST     1.87 feet High Tide
Thu -- 06:48 AM EST     Sunrise
Thu -- 10:48 AM EST     Moonrise
Thu -- 01:20 PM EST     0.05 feet Low Tide
Thu -- 05:52 PM EST     Sunset
Thu -- 07:15 PM EST     1.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-000.20.51.11.61.81.81.61.20.80.40.20.10.10.30.71.11.51.61.61.30.90.4

Tide / Current Tables for Point Patience, 0.1 mile southwest of, Maryland Current
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Point Patience
Click for MapFlood direction 315 true
Ebb direction 145 true

Thu -- 01:22 AM EST     0.00 knots Slack
Thu -- 03:53 AM EST     0.56 knots Max Flood
Thu -- 06:47 AM EST     Sunrise
Thu -- 06:55 AM EST     -0.00 knots Slack
Thu -- 10:45 AM EST     -0.71 knots Max Ebb
Thu -- 10:47 AM EST     Moonrise
Thu -- 03:10 PM EST     0.00 knots Slack
Thu -- 04:26 PM EST     0.22 knots Max Flood
Thu -- 05:51 PM EST     Sunset
Thu -- 06:15 PM EST     -0.00 knots Slack
Thu -- 10:19 PM EST     -0.62 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-0.10.20.50.60.50.2-0-0.3-0.5-0.7-0.7-0.6-0.5-0.3-00.20.20.1-0.2-0.4-0.5-0.6-0.6

Weather Map and Satellite Images
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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 (17,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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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.