Friday, April27, 2018 L-36.com


Marine Weather and Tides
Joppae, MD

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:08AMSunset 7:56PM Friday April 27, 2018 12:26 AM EDT (04:26 UTC) Moonrise 4:33PMMoonset 4:13AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 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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ANZ530 Chesapeake Bay North Of Pooles Island- 1032 Pm Edt Thu Apr 26 2018
Rest of tonight..E winds 5 kt. Waves flat. Rain likely.
Fri..N winds 5 to 10 kt. Waves 1 ft or less. Rain. Patchy fog. Vsby 1 to 3 nm.
Fri night..SW winds around 5 kt. Waves flat.
Sat..SW winds 5 to 10 kt. Waves 1 ft or less. A chance of showers.
Sat night..NW winds 5 to 10 kt. Waves 1 ft.
Sun..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
Sun night..NW winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Mon..W winds 10 to 15 kt. Waves 1 ft.
Tue..SW winds 5 to 10 kt. Waves 1 ft.
ANZ500 1032 Pm Edt Thu Apr 26 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. An area of low pressure over the southeastern states will move northward and pass over the waters later tonight. A cold front approaching from the great lakes will cross the waters Saturday. High pressure will build in from the ohio valley Sunday, then shift offshore early next week. A small craft advisory may be needed for portions of the waters Saturday night through Sunday night.

7 Day Forecast for Marine Location Near Joppae, MD
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location: 39.39, -76.36     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 270042
afdlwx
area forecast discussion
national weather service baltimore md washington dc
842 pm edt Thu apr 26 2018

Synopsis
Low pressure will approach from the south tonight before passing
through the area Friday. Another cold front will cross the region
late Saturday. High pressure will build across the region Saturday
night and hold through the middle of next week.

Near term through Friday
Low pressure moving across northern georgia is re-developing
over central north carolina this evening. This area of
redevelopment will become the primary low tonight, lifting
northeastward across southern maryland Friday morning before
departing to the northeast. Lift associated with this feature
combined with an inflow of atlantic moisture will lead to
another period of rain tonight into Fri morning. Axis of
heaviest rainfall as depicted by deterministic and ensemble
guidance shows heaviest rains around an inch in central va east
of the blue ridge to right along the i-95 corridor from
fredericksburg north the southern dc suburbs. Some thunder is
also possible late tonight and early Fri across central va and
southern md. Rain will exit quickly by mid-morning fri. Brief
mist or patchy fog is possible in the wake of steadier rain.

Will keep a risk of showers through the afternoon as additional
shortwave energy moves across the area.

Short term Friday night through Saturday night
Upper low over the eastern great lks Saturday will push a cold
front through the area Sat afternoon. Decent height falls will
accompany this trof with scattered showers expected to
develop along ahead of the front. SREF calibrated TSTM guidance
shows only a slight risk of thunder mainly over pa and northern
md. Will keep thunder out of the fcst for now. Cdfnt will clear
the area by late sat., but a few showers could still persist
into the night until trof axis crosses the area around 12z sun.

Long term Sunday through Thursday
A weak cold front will move through the region late Saturday into
early Sunday. A few scattered showers are possible early Sunday but
the frontal passage is looking fairly dry. Behind the front, a high
pressure will build into the region from the midwest settling over
our region on Monday. Skies on Sunday will slowly clear through the
early afternoon periods. Temperatures will be hovering in the upper
50s to lower 60s.

Monday through Wednesday, a high pressure system will slowly shift
eastward off the coast of the carolinas. A southerly to
southwesterly flow will form leading to warmer air being advected
into the mid-atlantic region and northward. Temperatures throughout
the next week will steadily rise up into the mid to upper 70s to
lower 80s by Wednesday. Winds look to remain light along with light
cloud cover due to a high pressure system influencing the weather
through most of next week.

Aviation 01z Friday through Tuesday
Developing MVFR ifr conditions late tonight into early Fri with
rain showers. Lowest CIGS looks to develop as steadiest rain
departs. Ifr generally 10-16z. CIGS improve Fri afternoon. Sct
showers expected again on Sat with a frontal passage.

Vfr conditions are expected through Tuesday as high pressure
system settles over the region.

Marine
Sca for lower md portion of chesapeake bay lower tidal potomac
river late tonight for a brief period of gusts on enhanced
easterly flow immediately ahead of approaching low pressure.

The low will depart to the northeast Friday. A cold front will
approach Saturday, then exit the region by Sunday. Sca
conditions are possible immediately ahead of and again behind
the front over the weekend. A high pressure system will be in
place Monday through early next week likely leading to sub-sca
conditions.

Hydrology
Enhanced easterly flow centered around 850 mb will result in
strong moisture transport into the region overnight. Favorable
easterly upslope areas in the central va blue ridge mountains as
well as central va piedmont into southern md will likely see the
most rain. On average around an inch is forecast in these areas,
with isolated totals of 1.5-2 inches possible in heavier
convective elements. Some of the flashier basins only need 1.5
inches in 3 hours (which will be about the span of the heaviest
rain in any one area) to flood. But due to the isolated nature
of these flashier areas and more isolated significant rainfall
totals, held off on a watch, but isolated flooding issues could
still arise late tonight early Friday morning, mainly across
central va east of the blue ridge.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 3 am to 10 am edt Friday for anz534-
537-543.

Synopsis... Lfr
near term... Lfr dhof
short term... Lfr
long term... Jmg
aviation... Lfr dhof jmg
marine... Bjl lfr dhof jmg
hydrology... Dhof


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BLTM2 - 8574680 - Baltimore, MD 14 mi39 min E 2.9 G 4.1 61°F 56°F1010.5 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 14 mi39 min ESE 2.9 G 4.1 58°F 58°F1011.2 hPa
FSNM2 15 mi39 min SE 7 G 7 61°F 1010.7 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 15 mi39 min E 4.1 G 4.1 60°F 1011 hPa
CPVM2 27 mi39 min 60°F 46°F
APAM2 - 8575512 - Annapolis, MD 29 mi39 min 59°F 1010.9 hPa
CHCM2 - 8573927 - Chesapeake City, MD 31 mi45 min ENE 1.9 G 2.9 54°F 57°F1012 hPa
TPLM2 - Thomas Point, MD 34 mi27 min E 6 G 7 59°F 54°F1012.2 hPa (-0.4)47°F
DELD1 - 8551762 - Delaware City, DE 43 mi39 min SSE 1.9 G 1.9 56°F 52°F1011.7 hPa
RDYD1 - 8551910 - Reedy Point, DE 43 mi39 min 56°F 55°F1011.3 hPa
BSLM2 - Chesapeake Bay, MD 46 mi117 min N 1.9 57°F 1012 hPa49°F

Wind History for Tolchester Beach, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore / Martin, MD5 mi48 minN 010.00 miFair57°F51°F82%1011.8 hPa
Phillips Army Air Field / Aberdeen, MD11 mi89 minN 010.00 miOvercast53°F45°F78%1012.5 hPa
Baltimore, Inner Harbor, MD15 mi33 minno data mi62°F43°F50%1011.2 hPa
Baltimore, Baltimore-Washington International Airport, MD21 mi33 minS 310.00 miOvercast59°F43°F56%1011 hPa

Wind History from MTN (wind in knots)
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Last 24hrW6W8W14W11
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SW8SW7CalmCalmCalmCalmCalmCalm
1 day agoNE8
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NE4NE3NE4CalmCalmCalmCalmCalmCalmE3E3CalmCalmSE4NW5NW8NW6NW10NW7NW8W5W3W4
2 days agoCalmE3E5E6CalmE5E4E4E3E7E10E9E11
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NE4E9NE7NE6NE7NE7

Tide / Current Tables for Battery Point, Gunpowder River, Maryland
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Battery Point
Click for Map
Fri -- 12:41 AM EDT     0.32 feet Low Tide
Fri -- 05:12 AM EDT     Moonset
Fri -- 06:11 AM EDT     Sunrise
Fri -- 06:23 AM EDT     1.74 feet High Tide
Fri -- 01:21 PM EDT     0.23 feet Low Tide
Fri -- 05:33 PM EDT     Moonrise
Fri -- 06:54 PM EDT     1.49 feet High Tide
Fri -- 07:54 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.30.50.81.21.51.71.71.51.30.90.60.40.20.30.50.81.21.41.51.41.20.90.7

Tide / Current Tables for Bowley Bar, Middle River, Maryland
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Bowley Bar
Click for Map
Fri -- 12:14 AM EDT     0.32 feet Low Tide
Fri -- 05:12 AM EDT     Moonset
Fri -- 06:10 AM EDT     1.74 feet High Tide
Fri -- 06:11 AM EDT     Sunrise
Fri -- 12:54 PM EDT     0.23 feet Low Tide
Fri -- 05:33 PM EDT     Moonrise
Fri -- 06:41 PM EDT     1.49 feet High Tide
Fri -- 07:55 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.40.60.91.31.61.71.71.51.20.80.50.30.20.30.60.91.31.51.51.41.10.80.6

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (0,6,7,8)
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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.