Saturday, July22, 2017 L-36.com


Marine Weather and Tides
Rock Hall, 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 5:57AMSunset 8:27PM Saturday July 22, 2017 6:52 AM EDT (10:52 UTC) Moonrise 4:04AMMoonset 6:49PM Illumination 2% Phase: Waning Crescent; Moon at 28 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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ANZ531 Chesapeake Bay From Pooles Island To Sandy Point- 432 Am Edt Sat Jul 22 2017
Rest of the overnight..NW winds 5 kt. Waves flat.
Today..SE winds 5 kt. Waves flat. A chance of showers and tstms.
Tonight..W winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely.
Sun..SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely.
Sun night..W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Mon..W winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Mon night..NW winds 5 to 10 kt. Waves 1 ft.
Tue..NE winds 5 to 10 kt. Waves 1 ft.
Wed..SE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 432 Am Edt Sat Jul 22 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Light winds are expected with high pressure to the south through the weekend. Scattered Thunderstorms are expected each afternoon and evening. A cold front will move through Sunday night.

7 Day Forecast for Marine Location Near Rock Hall, MD
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location: 39.15, -76.35     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 220759
afdlwx
area forecast discussion
national weather service baltimore md washington dc
359 am edt Sat jul 22 2017

Synopsis
High pressure remains off the southeast coast. Multiple upper
level disturbances will be possible through Sunday. An upper
level trough of low pressure will move over the northeastern us
early in the week.

Near term today
"the hottest time of the year... " is holding true to form. We
have issued a heat advisory for the i-95 corridor from baltimore
to fredericksburg east to the bay. Question may be how much
cloud cover moves into the area. The way i'm playing it is
that there will be a decent amount of sunshine heating during
the morning, then increasing clouds in the afternoon given
dewpoints in the lower 70s as well as the approaching MCS which
may cap the temp rise in the afternoon. Low to mid 90s air
temperature will be common east of the mountains. However this
is nowhere near daily record values - in 2011 iad reached 105
(also monthly record) and bwi hit 106. Dca reached 103 in 1926.

The next problem to deal with is potential severe weather this
afternoon evening. The main players are a) the heat and humidity
leading to large potential temperature values, and b) the system
over indiana illinois. Watches are currently in effect in this
area, and if the storms remain on their current trajectories
these should impact pa through northern va during prime severe
time. Low level shear is fairly weak but with available cape
storms will have the ability to grow tall. Hrrr is showing 22z
west to 02z east as being the time of greatest potential. Strong
gusty winds will be the primary threat with large hail as a
secondary threat - upper atmosphere is very warm with the -20 c
being at 26.7k feet.

Short term tonight through Monday
Storms could be ongoing during the evening then another
overnight with lows in the 70s.

Sunday appears to be shaping up to be another severe convective
day. Models progged a stronger upper level disturbance with
significant height falls for summertime standards. Shear is also
on the increase and many ensemble members show moderate cape
and some even high CAPE values over 3500 j kg. Expect clusters
of storms to move across the area some with damaging winds.

A cold front will approach the region Monday before pushing across
the region Monday night. Showers and thunderstorms will develop
along and ahead of this front. Highs will reach the 90s again.

Long term Monday night through Friday
Noticeable change in the weather will occur following the cold
frontal passage on Monday. High pressure will build into the great
lakes behind the front Monday night, and translate eastward into the
northeastern united states on Tuesday. This will lead to cooler and
less humid conditions with developing northerly to easterly flow.

The high will then quickly shift offshore by Wednesday, but
lingering easterly flow should still keep the temperatures pleasant
across much of the area. There could be some scattered
showers thunderstorms south west nearest to the old frontal boundary
and across the higher terrain.

By the end of the week, the flow will turn around to the southwest
ahead of an approaching frontal system. Temperatures moisture will
likely spike back up ahead of the front, and along with that the
chances for showers thunderstorms.

As far as temperatures, highs Tuesday Wednesday generally in the
80s, and back to near or slightly above 90f for Thursday Friday.

Aviation 08z Saturday through Wednesday
Vfr conditions expected today. Thunderstorms with strong gusty
winds will be possible late this afternoon early this evening.

Storms will again be possible Sunday.

PredominantlyVFR expected Monday night through Wednesday. There may
be some patchy fog low clouds each morning, but otherwise no
significant aviation weather concerns.

Marine
Winds will be below SCA values today through Sunday. Strong
thunderstorms capable of required smw's will be possible late
this afternoon this evening and again Sunday.

Mainly sub-sca winds expected Monday night through Wednesday,
generally northerly Monday night, turning easterly by Wednesday.

Lwx watches warnings advisories
Dc... Heat advisory from noon today to 7 pm edt this evening for
dcz001.

Md... Heat advisory from noon today to 7 pm edt this evening for
mdz011-013-014-016>018-504-506.

Va... Heat advisory from noon today to 7 pm edt this evening for
vaz052>057.

Wv... None.

Marine... None.

Products... Woody! Mjm


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44043 - Patapsco, MD 2 mi42 min NNE 7.8 G 9.7 83°F 1011.7 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 7 mi52 min E 2.9 G 4.1 77°F 85°F1011.5 hPa (-0.0)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 11 mi52 min NNW 8 G 8.9 82°F 1011 hPa (-0.0)
CPVM2 11 mi52 min 83°F 78°F
APAM2 - 8575512 - Annapolis, MD 13 mi52 min 81°F 1010.6 hPa (-0.0)
44063 - Annapolis 14 mi42 min N 3.9 G 5.8 82°F 1011.7 hPa
BLTM2 - 8574680 - Baltimore, MD 15 mi52 min N 6 G 8.9 82°F 86°F1010.9 hPa (-0.0)
TPLM2 - Thomas Point, MD 18 mi52 min N 7 G 7 83°F 83°F
44057 - Susquehanna, MD 31 mi42 min N 9.7 G 12 80°F 1011.2 hPa
BSLM2 - Chesapeake Bay, MD 32 mi142 min Calm 73°F 1011 hPa72°F
CHCM2 - 8573927 - Chesapeake City, MD 39 mi52 min SE 1.9 G 1.9 78°F 87°F1011.7 hPa (-0.0)
WASD2 - 8594900 - Washington, DC 40 mi52 min WNW 5.1 G 6 80°F 87°F1011.2 hPa (-0.0)
44062 - Gooses Reef, MD 41 mi42 min N 9.7 G 12 81°F 1011.6 hPa
CA2 - 8571892 - Cambridge, MD 42 mi52 min 80°F 87°F1011.6 hPa (-0.3)
DRSD1 - Delaware Reserve, DE 49 mi82 min Calm 76°F 1011 hPa75°F

Wind History for Tolchester Beach, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay Bridge Field, MD12 mi67 minN 07.00 miFair81°F75°F84%1011.2 hPa
Baltimore / Martin, MD14 mi67 minN 010.00 miPartly Cloudy79°F75°F89%1011.5 hPa
Annapolis, United States Naval Academy, MD14 mi58 minN 08.00 miMostly Cloudy79°F79°F100%1011 hPa
Baltimore, Inner Harbor, MD16 mi58 minno data mi83°F73°F72%1011.4 hPa
Baltimore, Baltimore-Washington International Airport, MD17 mi58 minNW 47.00 miMostly Cloudy78°F75°F90%1011.2 hPa
Fort Meade / Tipton, MD23 mi64 minN 01.75 miSky Obscured73°F71°F94%1012.2 hPa
Phillips Army Air Field / Aberdeen, MD24 mi1.9 hrsN 010.00 miFair75°F73°F95%1011.4 hPa

Wind History from W29 (wind in knots)
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Last 24hrNW6NW8N7N5NW5NW5SW5CalmSW3SE5SE7S7S7S3CalmS6S3CalmSW3CalmCalmNE4NE3NE4
1 day agoSW3W4W3CalmNW3SW3W6SW6S9S8S8S8S6S6S7S5SW4SW4SW4SW5W3W4NW5W5
2 days agoCalmSW5W3W3CalmCalmW4W7S4S6S4S7S6S4S6S7S5S6S5SW5SW4N3CalmCalm

Tide / Current Tables for Baltimore (Chesapeake Bay), Maryland
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Baltimore (Chesapeake Bay)
Click for Map
Sat -- 05:04 AM EDT     Moonrise
Sat -- 05:57 AM EDT     Sunrise
Sat -- 06:16 AM EDT     6.25 feet High Tide
Sat -- 01:33 PM EDT     4.52 feet Low Tide
Sat -- 06:35 PM EDT     5.48 feet High Tide
Sat -- 07:48 PM EDT     Moonset
Sat -- 08:25 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.44.64.95.45.86.16.26.265.75.454.74.64.54.755.35.45.55.354.84.6

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Sat -- 12:46 AM EDT     0.00 knots Slack
Sat -- 04:32 AM EDT     1.29 knots Max Flood
Sat -- 05:04 AM EDT     Moonrise
Sat -- 05:57 AM EDT     Sunrise
Sat -- 08:04 AM EDT     -0.00 knots Slack
Sat -- 11:19 AM EDT     -1.13 knots Max Ebb
Sat -- 02:58 PM EDT     0.00 knots Slack
Sat -- 05:24 PM EDT     0.57 knots Max Flood
Sat -- 07:48 PM EDT     Moonset
Sat -- 07:57 PM EDT     -0.00 knots Slack
Sat -- 08:25 PM EDT     Sunset
Sat -- 10:58 PM EDT     -0.76 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.30.10.611.31.310.60-0.5-0.9-1.1-1.1-0.8-0.400.40.60.50.3-0-0.4-0.7-0.8

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 (6,6,7,8)
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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.