Friday, August23, 2019 L-36.com


Marine Weather and Tides
Riva, MD

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:25AMSunset 7:52PM Friday August 23, 2019 6:32 PM EDT (22:32 UTC) Moonrise 11:21PMMoonset 12:57PM Illumination 41% Phase: Third Quarter Moon; Moon at 23 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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ANZ532 Chesapeake Bay From Sandy Point To North Beach- 438 Pm Edt Fri Aug 23 2019
.small craft advisory in effect until 6 pm edt this evening...
.small craft advisory in effect from 3 am edt Saturday through Saturday morning...
Rest of this afternoon..N winds 10 kt with gusts to 20 kt. Waves 2 ft. Numerous showers.
Tonight..N winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Sat..NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Sat night..E winds 10 to 15 kt. Waves 1 to 2 ft.
Sun..NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Sun night..NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Mon..E winds 10 to 15 kt. Waves 1 to 2 ft.
Tue..SE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
ANZ500 438 Pm Edt Fri Aug 23 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will stall over the carolinas Saturday. High pressure will then settle over the area Saturday into Sunday. Small craft advisories are possible over the waters Saturday night through Monday.


7 Day Forecast for Marine Location Near Riva, MD
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location: 38.89, -76.6     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 231838
afdlwx
area forecast discussion
national weather service baltimore md washington dc
238 pm edt Fri aug 23 2019

Synopsis
A cold front will move into the southern mid-atlantic and
southeast states tonight into Saturday. Strong high pressure
will build north of the region tonight and settle over northern
new england and atlantic canada through early next week. A
tropical cyclone could form over the weekend and move near the
southeast coast and out to sea.

Near term through tonight
The cold front has cleared through almost the entire region,
with the exception being the southern tip of saint marys county
in md and nelson and southern albemarle counties in va. A
surface wave is positioned along the boundary across central and
western va and this will move eastward along the front through
the afternoon hours and be positioned near the southern delmarva
by this evening. Widespread rain showers are occurring across
the region, and some heavier rain has been noted just to the
north of the surface low front and this will continue with
localized rates as high as one inch per hour. Ahead of the
front and surface low, enough instability is present for some
isolated to scattered thunderstorms, and an isolated severe
thunderstorm is possible. The risk for this mainly exists across
nelson and southern albemarle counties and only for the next 1-2
hours.

Temperatures have cooled considerably with mid afternoon
readings in the 60s to near 70f.

Rain showers will end from NW to SE late today and this evening
with drier air filtering in overnight. Lows tonight will be in
the 50s 60s.

Short term Saturday through Sunday night
High pressure will build north of the region on Saturday with
north to northeasterly flow continuing. Aloft an upper level
trough will rotate across the region. This will lead to a mix of
sun and clouds with more clouds south, but everywhere should at
least see a scattered cumulus deck. An isolated shower is also
possible, especially near the chesapeake bay where instability
will locally be higher due to warmer water temperatures.Highs
will range through the mid to upper 70s. Lows Saturday night in
the 50s 60s.

The ridge will strengthen down the mid-atlantic coastline on
Sunday with flow turning more easterly. A mix of Sun and clouds
is expected again, although likely more clouds than Saturday. An
isolated shower remains possible again as well. Highs in the 70s
to near 80f. Lows Sunday night in the 50s 60s.

Long term Monday through Friday
An upper-level ridge will build in over the region on Monday and
Tuesday. Meanwhile, at the surface, high pressure sets up across the
northeast, resulting in ridging along east of the appalachains.

Generally expecting dry conditions on Monday, but can't rule out
some stray showers across the higher elevations, as 850-700mb flow
seems to be more easterly. This is in response to a low pressure
system riding along the nc coastline throughout the day. Rain
chances will be highest along east of the blue ridge, but still not
all that high on Monday. Temperatures will remain below average,
with highs in the low 80s or so.

Monday night into Tuesday, rain chances increase, as low pressure
slides by to the southeast, high pressure still to the northeast.

This results in easterly low-mid level flow, and likely a higher
rain chance. Could even see some embedded thunderstorms, as
temperatures will be a bit warmer (highs around the mid 80s) and the
atmosphere will be more moist. Additionally, an upper trough will be
approaching from the west, lending some upper-level support as well.

A cold front, associated with a low moving from the great lakes into
ontario, will push through the region on Wednesday, before possibly
stalling overhead into Thursday. Ahead of this front, southerly flow
returns, bringing highs into the mid-upper 80s as well as more
humidity. Showers and thunderstorms will again be possible on both
days, especially on Wednesday. Most of the upper-level support is
displaced far to the north, so not seeing an organized severe threat
at this time.

Aviation 18z Friday through Wednesday
MVFR ceilings with showers expected for much of the afternoon across
the TAF sites. Localized heavier rain with reduced visibilities
are also likely. A few stronger thunderstorms are possible near
cho this afternoon. Conditions will improve this evening and
especially tonight.VFR then expected Saturday and Sunday.

Vfr expected for Monday and Tuesday for the majority of the time at
all terminals. However, an isolated shower or storm could bring
conditions to MVFR at times, primarily near mrb and cho, and with
best chances on Tuesday afternoon.

Marine
Sca is in effect into this evening for portions of the tidal
potomac and central chesapeake bay through this evening for
gusty northerly winds as a front moves southward across the
waters. In addition, some smws may be required for the far
southern waters this afternoon as scattered thunderstorms move
along the front. Improving weather tonight as cold front pushes
south, but additional northerly flow will create SCA conditions
later tonight into Saturday. Additional scas may be needed for
northeasterly winds Saturday night through Monday with strong
gradient between high pressure across new england low pressure
near the southeastern us coastline.

Winds should relax by Tuesday, around 10 knots, with no marine
hazards expected at this time.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 3 am to noon edt Saturday for
anz531>534-537-539>541-543.

Small craft advisory until 6 pm edt this evening for anz532-
533-540-541.

Small craft advisory until 10 pm edt this evening for anz534-
537-542-543.

Synopsis... Mm
near term... Mm
short term... Mm
long term... Cjl
aviation... Mm cjl
marine... Mm cjl


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
APAM2 - 8575512 - Annapolis, MD 9 mi62 min 68°F 1016.5 hPa
BSLM2 - Chesapeake Bay, MD 9 mi122 min Calm 67°F 1016 hPa66°F
TPLM2 - Thomas Point, MD 9 mi32 min NW 16 G 18 68°F 81°F1017.7 hPa (+0.8)64°F
CPVM2 13 mi62 min 69°F 69°F
WASD2 - 8594900 - Washington, DC 22 mi62 min NNW 8 G 13 70°F 84°F1017.1 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 23 mi62 min N 8 G 9.9 67°F 1017.1 hPa
FSNM2 23 mi62 min N 6 G 8.9 67°F 1016.7 hPa
44062 - Gooses Reef, MD 25 mi32 min NE 12 G 14 71°F 1 ft1017.1 hPa (+1.1)
BLTM2 - 8574680 - Baltimore, MD 26 mi62 min N 1.9 G 7 67°F 83°F1016.8 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 29 mi62 min NE 4.1 G 8.9 67°F 83°F1017.1 hPa
CA2 - 8571892 - Cambridge, MD 36 mi62 min NNE 7 G 12 67°F 83°F1015.5 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 36 mi62 min ENE 11 G 15 68°F 1016.4 hPa
SLIM2 - 8577330 - Solomons Island, MD 40 mi62 min NNE 8.9 G 13 69°F 83°F1015.2 hPa
NCDV2 46 mi62 min N 6 G 8 68°F 87°F1015.6 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD9 mi38 minN 810.00 miOvercast71°F64°F81%1016.9 hPa
Camp Springs / Andrews Air Force Base, MD15 mi36 minN 810.00 miLight Rain66°F63°F94%1017.4 hPa
Bay Bridge Field, MD15 mi57 minN 57.00 miLight Rain66°F66°F100%1016.9 hPa
Fort Meade / Tipton, MD16 mi50 minN 010.00 miOvercast64°F60°F88%1017.9 hPa
College Park Airport, MD18 mi49 minN 510.00 miOvercast0°F0°F%1017.3 hPa
Baltimore, Baltimore-Washington International Airport, MD21 mi38 minVar 610.00 miOvercast67°F61°F81%1016.8 hPa
Washington/Reagan National Airport, DC, VA23 mi40 minNNW 910.00 miOvercast70°F64°F84%1017.2 hPa

Link to 5 minute data for KNAK

Wind History from NAK (wind in knots)
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Last 24hrS9S6S3N11N3CalmS3S33W3W3N6N7N8N9N12N13
G19
N10N7N8N10N5NE5N8
1 day agoW12
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W4CalmNW6CalmCalmCalmCalmNW3CalmW4NW3NW4W3NW3NW5W8W5
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2 days ago3CalmW5CalmS3S6S6W3W53CalmS4S555S10
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Tide / Current Tables for Rhode River (County Wharf), Maryland
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Rhode River (County Wharf)
Click for Map
Fri -- 05:31 AM EDT     0.80 feet Low Tide
Fri -- 06:26 AM EDT     Sunrise
Fri -- 10:22 AM EDT     1.19 feet High Tide
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 01:57 PM EDT     Moonset
Fri -- 04:22 PM EDT     0.36 feet Low Tide
Fri -- 07:50 PM EDT     Sunset
Fri -- 11:27 PM EDT     1.67 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.31.210.90.80.80.911.11.21.210.90.60.50.40.40.50.711.31.51.7

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Fri -- 03:01 AM EDT     -0.00 knots Slack
Fri -- 06:07 AM EDT     -0.64 knots Max Ebb
Fri -- 06:25 AM EDT     Sunrise
Fri -- 09:40 AM EDT     0.00 knots Slack
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 11:57 AM EDT     0.30 knots Max Flood
Fri -- 01:57 PM EDT     Moonset
Fri -- 02:17 PM EDT     -0.00 knots Slack
Fri -- 05:35 PM EDT     -0.55 knots Max Ebb
Fri -- 07:49 PM EDT     Sunset
Fri -- 08:29 PM EDT     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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0.80.60.40-0.3-0.5-0.6-0.6-0.4-0.20.10.20.30.20.1-0.2-0.4-0.5-0.5-0.4-0.20.20.50.8

Weather Map and Satellite Images
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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 (18,4,5,8)
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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.