Tuesday, August20, 2019 L-36.com


Marine Weather and Tides
Riviera Beach, MD

Version 3.4
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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 6:22AMSunset 7:56PM Tuesday August 20, 2019 8:21 PM EDT (00:21 UTC) Moonrise 9:45PMMoonset 9:58AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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- 759 Pm Edt Tue Aug 20 2019
.severe Thunderstorm watch 605 in effect until 9 pm edt this evening...
.small craft advisory in effect from Wednesday afternoon through Wednesday evening...
Tonight..SE winds 5 kt. Waves less than 1 ft. Scattered showers and tstms, mainly this evening.
Wed..S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. Scattered showers and tstms.
Wed night..W winds 5 to 10 kt. Gusts up to 20 kt early in the evening. Waves 1 ft. Scattered showers and tstms.
Thu..W winds 5 kt. Waves flat. A chance of showers and tstms.
Thu night..NW winds 5 to 10 kt. Waves 1 ft or less. A chance of showers.
Fri..N winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Fri night..N winds 5 kt. Waves less than 1 ft. A chance of showers.
Sat..NE winds 5 kt. Waves less than 1 ft. A chance of showers in the morning.
Sun..E winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 759 Pm Edt Tue Aug 20 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure in the atlantic will promote a light southerly flow over the region into Wednesday. A cold front will approach the waters late Wednesday night into Thursday and stall near or south of the area into Friday. High pressure will then settle over the area Saturday into Sunday.


7 Day Forecast for Marine Location Near Riviera Beach, MD
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location: 39.16, -76.53     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 201904
afdlwx
area forecast discussion
national weather service baltimore md washington dc
304 pm edt Tue aug 20 2019

Synopsis
An upper level disturbance will cross the region this afternoon
and evening. A cold front will approach the ohio valley
Wednesday, sinking into our area Wednesday night into Thursday,
possibly stalling into Friday. Behind the front, high pressure
will build over the region for the weekend.

Near term through tonight
Hot and humid conditions are in place across the region this
afternoon with temperatures from the low to mid 90s and dew
points in the upper 60s to low 70s. This has led to heat
indices from the upper 90s to low 100s, remaining just below
heat advisory criteria.

This heat and humidity has led to the development of between
1000 and 2000 j kg of mlcape, with in excess of 1000 j kg of
dcape.

Scattered showers and thunderstorms have initiated mainly on the
remnant MCS that is crossing the appalachians early this
afternoon. Some additional isolated activity has also developed
out ahead of it on sea-breeze or remnant outflow boundaries. A
general eastward motion is expected at first as the vort
associated with the remnant MCS moves eastward, and this is
generally depicted well by the 12z cams. As outflow increases,
additional activity will likely develop, and a southward trend
in storm development coverage is likely this evening, with the
threat shifting from west of the blue ridge at during the mid
afternoon to much of central northern va, central northern md,
and the metros during the late afternoon and early evening
hours, to central va and southern md during the mid to late
evening hours. The main severe threat will be locally damaging
winds. An isolated incident of flooding due to heavy rain is
also possible given slow storm motion and high moisture levels.

A downward trend in convection will occur late this evening
with partly cloudy skies and isolated showers overnight. Some
patchy fog is also possible. Lows will range from the upper 60s
to mid 70s.

Short term Wednesday through Thursday night
Upper vort trough will be on the doorstep by Wednesday morning
and will cross the region during the day Wednesday. A surface
trough is also expected to cross the region during this time. Instability
will be a bit lower due to increased cloud cover and slightly
lower temperatures, but additional scattered showers and
thunderstorms are expected, with a few isolated thunderstorms
possible. Highs will range from the upper 80s to lower 90s.

Activity will wane again Wednesday night. Lows in the 70s.

The front will shift southward into the region on Thursday,
likely crossing much of the area through Thursday night, with
continued chances for showers and thunderstorms. Highs will
range from the upper 80s to lower 90s. Lows in the 60s to around
70f.

Long term Friday through Tuesday
The cold front will stall near, or just south of the area on Friday,
resulting in yet another chance for scattered showers and
thunderstorms throughout the day. One big change will be in the
temperatures in humidity, as highs on Friday look to only be in the
upper 70s to low 80s, with some guidance even a little cooler up
north. Humidity will also drop significantly, with dew points
dropping into the low 60s. Overnight lows will be noticeably cooler,
ranging from the mid 50s over the higher elevations to the low mid
60s east of the blue ridge. Rain chances will increase the farther
south you go, so areas in the central va piedmont and southern md
stand the best chance.

By Saturday, there still remains some discrepancies between the
global guidance, with the GFS clearing the front from the area
Friday night, resulting in dry weather on Saturday. The ecmwf
however, clears the front Saturday morning or early afternoon,
resulting in showers early in the day (primarily in the central va
piedmont and perhaps southern md). Regardless, thinking that things
clear out by noon everywhere on Saturday. Areas farther north likely
stay dry all day. Another day with highs in the upper 70s to low
80s, accompanies by low humidity, thanks to cool canadian high
pressure building in from the north. Overnight lows again will range
from the mid 50s over the higher elevations to the low mid 60s east
of the blue ridge.

High pressure dominates on Sunday, with temperatures remaining
consistent in the upper 70s to low 80s. Will carry slight chance for
some showers across central va, but thinking the front should be far
enough south by then to be out of our hair.

By Monday, some indications of a return flow are shown among the
guidance, meaning that the front would begin to lift back north as a
warm front potentially. Very low confidence at this point, as the
ecmwf keeps the front to the south, while the GFS wants to bring it
back north across the region. For now, will keep chance slight
chance pops in the forecast.

Aviation 18z Tuesday through Sunday
Scattered showers and thunderstorms are expected today. While
showers and thunderstorms will be scattered in nature, brief
reductions in visibility and ceilings are possible and some
storms could be strong to severe, with damaging winds and large
hail being the primary hazards. Patchy fog may then result in
MVFR ifr visibilities overnight. Additional showers and storms
can be expected both Wednesday and Thursday afternoon evening as
a frontal boundary moves into the region. Again, brief episodes
of subVFR conditions will be possible in passing
showers storms.

Vfr conditions are expected for much of the long term period at
every terminal except for cho. Showers and a few thunderstorms are
expected on Friday, which will lead to periods of sub-vfr
conditions. This could continue into Saturday as well.

Marine
Gusty showers and storms likely this afternoon and evening over
the waters, so if planning on being on the waters ensure you
have multiple ways to receive special marine warnings if they
are issued. A light southerly flow is expected today and
tonight, and will begin to increase Wednesday as a cold front
nears to the west. This will likely bring gusts to SCA threshold
Wednesday and Wednesday evening, so SCA has been issued. The
aforementioned front will slowly makes it way south across the
waters late Wednesday night and during the day on Thursday, with
continued chances for gusty showers storms.

Sub-sca winds expected through the weekend. However, scattered
showers and thunderstorms on Friday could lead to some brief gusty
winds. Best chance for this activity will be in the central bay and
lower tidal potomac.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 1 pm to 7 pm edt Wednesday for
anz530-531-535-536-538-539-542.

Small craft advisory from 9 am Wednesday to midnight edt
Wednesday night for anz532>534-537-540-541-543.

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
FSNM2 4 mi58 min SW 4.1 G 8 81°F 1016.8 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 4 mi52 min WSW 9.9 G 11 82°F 1016.8 hPa
BLTM2 - 8574680 - Baltimore, MD 8 mi52 min SW 5.1 G 7 84°F1016.4 hPa
APAM2 - 8575512 - Annapolis, MD 13 mi52 min 82°F 1016.5 hPa
CPVM2 14 mi52 min 83°F 71°F
TCBM2 - 8573364 - Tolchester Beach, MD 16 mi52 min SSE 1 G 2.9 86°F1017.1 hPa
TPLM2 - Thomas Point, MD 19 mi82 min SSW 8.9 G 9.9 82°F 83°F1017.2 hPa (-1.1)71°F
BSLM2 - Chesapeake Bay, MD 28 mi112 min WSW 1 77°F 1016 hPa73°F
WASD2 - 8594900 - Washington, DC 33 mi52 min W 4.1 G 8 85°F1017.8 hPa
44062 - Gooses Reef, MD 42 mi28 min W 18 G 19 81°F 1018.7 hPa
CHCM2 - 8573927 - Chesapeake City, MD 46 mi52 min S 1.9 G 4.1 85°F1016.5 hPa
CA2 - 8571892 - Cambridge, MD 47 mi52 min S 1 G 6 85°F1017 hPa

Wind History for Francis Scott Key Bridge NE Tower, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore, Baltimore-Washington International Airport, MD8 mi88 minW 810.00 miMostly Cloudy79°F72°F79%1016.4 hPa
Baltimore, Inner Harbor, MD9 mi88 minno data mi85°F70°F61%1016.7 hPa
Annapolis, United States Naval Academy, MD13 mi88 minVar 310.00 miFair86°F68°F55%1016.3 hPa
Baltimore / Martin, MD14 mi97 minSSE 310.00 miMostly Cloudy84°F73°F70%1017.3 hPa
Fort Meade / Tipton, MD14 mi61 minSE 610.00 miPartly Cloudy72°F69°F94%1017.6 hPa
Bay Bridge Field, MD17 mi62 minWSW 310.00 miFair82°F71°F70%1016.9 hPa
College Park Airport, MD24 mi59 minWNW 310.00 miFair73°F70°F94%1017.3 hPa

Link to 5 minute data for KBWI

Wind History from BWI (wind in knots)
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Last 24hrSE3S5W3W4W3N6W3SW4W3CalmCalmNE3NE5E8E86E9E8E7E9SE11S11
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1 day agoCalmS3S7CalmCalmW4CalmW3CalmCalmCalmW33W6SW6W5W9W9W9NW11
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2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE3CalmSW3CalmCalmSW5SE8SE10NE11
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Tide / Current Tables for Fort Carroll, Maryland
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Fort Carroll
Click for Map
Tue -- 04:43 AM EDT     0.74 feet Low Tide
Tue -- 06:23 AM EDT     Sunrise
Tue -- 10:22 AM EDT     1.60 feet High Tide
Tue -- 10:57 AM EDT     Moonset
Tue -- 05:00 PM EDT     0.44 feet Low Tide
Tue -- 07:54 PM EDT     Sunset
Tue -- 10:43 PM EDT     Moonrise
Tue -- 11:11 PM EDT     1.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.210.90.80.70.811.21.51.61.61.41.20.90.70.50.40.50.711.31.51.6

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Tue -- 12:28 AM EDT     -0.00 knots Slack
Tue -- 03:21 AM EDT     -0.62 knots Max Ebb
Tue -- 06:20 AM EDT     0.00 knots Slack
Tue -- 06:23 AM EDT     Sunrise
Tue -- 09:17 AM EDT     0.61 knots Max Flood
Tue -- 10:57 AM EDT     Moonset
Tue -- 12:11 PM EDT     -0.00 knots Slack
Tue -- 03:27 PM EDT     -0.75 knots Max Ebb
Tue -- 06:37 PM EDT     0.00 knots Slack
Tue -- 07:53 PM EDT     Sunset
Tue -- 09:53 PM EDT     0.79 knots Max Flood
Tue -- 10:43 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.2-0.2-0.5-0.6-0.6-0.4-0.10.20.50.60.60.40.1-0.3-0.6-0.7-0.7-0.5-0.20.10.50.70.80.7

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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Wind Forecast for Baltimore, MD/Washington (20,4,5,8)
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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.