Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Marlboro Meadows, 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 6:24AMSunset 7:55PM Wednesday August 21, 2019 7:46 AM EDT (11:46 UTC) Moonrise 10:13PMMoonset 10:56AM Illumination 67% Phase: Waning Gibbous; Moon at 21 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- 736 Am Edt Wed Aug 21 2019
.small craft advisory in effect through this evening...
Today..S winds 10 to 15 kt. Gusts up to 20 kt... Increasing to 25 kt late. Waves 1 to 2 ft...building to 3 ft late. Isolated showers and tstms this morning, then scattered showers and tstms this afternoon.
Tonight..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. A chance of showers and tstms.
Thu..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Thu night..SW winds 5 kt...becoming nw after midnight. Waves 1 ft. 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 to 10 kt. Waves 1 ft. A chance of showers.
Sat..NE winds 5 to 10 kt. Waves 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 736 Am Edt Wed Aug 21 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 today. A cold front will approach the waters late tonight into Thursday, before stalling 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 Marlboro Meadows, MD
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location: 38.89, -76.65     debug


Area Discussion for - Baltimore, MD/Washington
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Fxus61 klwx 210800
afdlwx
area forecast discussion
national weather service baltimore md washington dc
400 am edt Wed aug 21 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
A warm front is depicted across pennsylvania early this morning
as an area of low pressure is situated over the great lakes.

Over our area, skies are party to mostly cloudy as cloud debris
from decaying showers storms to our west and east drift
overhead. Temperatures are a touch cooler than we've seen the
past few nights, ranging from the middle 60s to lower 70s.

Dewpoints once again are on a similar track, so patchy fog is
being observed in the sheltered valleys along and west of the
blue ridge mountains.

The aforementioned low will track north and east of the great
lakes today, lifting the warm front into new england while at
the same time dragging a cold front toward the ohio valley late
in the day. As the upper level trough nearing west virginia this
morning slides eastward today, this will help trigger scattered
showers and thunderstorms this afternoon and evening.

Instability will not be as impressive as what we saw on Tuesday,
given a bit more cloud cover and slightly cooler temperatures,
and the best synoptic lift will reside north and east of the
mason dixon line. That being said, 1000-1500 j kg of mucape
should develop by this afternoon, along with modest low level
lapse rates and 0-6km shear coming in around 20-25 knots. Pwats
will remain elevated, hovering around two inches today. These
ingredients will support at least an isolated threat for severe
thunderstorms today, with damaging winds and large hail
continuing to be the primary threats.

Shower and thunderstorm activity this evening will dwindle, with
partly cloudy skies and mainly dry conditions persisting
overnight. Patchy fog will be possible towards morning as
temperatures bottom out in the middle 60s to middle 70s.

Short term Thursday through Friday night
The cold front will slowly drift into our area Thursday
morning, helping spark scattered showers and thunderstorms
during the afternoon and evening hours once again. Given the
front will be gracing us with its presence, while coinciding
with shortwave energy tracking overhead, do expect better
coverage of showers storms compared to today. Again, instability
may be limited given cloud cover and lower temperatures,
however we will remain moist and the flow will be parallel to
the front. So in addition to isolated strong to severe storms,
heavy rain resulting in isolated incidents of flooding will be a
concern.

The front shifts southward Thursday night into Friday, but
likely lingers close enough nearby to bring additional
scattered showers and storms on Friday afternoon and evening,
favoring our southern zones. Temperatures noticeably cooler on
Friday, likely holding in the 80s area wide. A drying trend
should commence Friday night as the front sinks further south
into southern virginia.

Long term Saturday through Tuesday
High pressure will build into the region from the north Saturday
and Sunday. Temperatures will be about 5 to 7 degrees below
average. Dry conditions and lower humidity is expected through the
period.

The high will move to the northeast Monday and Tuesday. This will
allow for a return southeast to southerly flow to bring the
humidity levels up and a chance of showers or a thunderstorms. The
discrepancy remains between the european models and GFS models as to
how many and how far north will showers and thunderstorms develop.

The european model keeps most, if not all, of our CWA dry through
Tuesday. The GFS model brings an upper level disturbance across our
region late Monday into Tuesday; thus, the chance for showers and
thunderstorms could be higher and farther north. Temperatures will
remain a few degrees below average, but humidity levels will rise
some.

Aviation 08z Wednesday through Sunday
Afternoon evening showers and storms can be expected through
Friday as a cold front slowly transits the area, bringing
periods of subVFR conditions. Patchy fog could also yield
MVFR ifr vis, mostly likely at mrb cho.

Vfr conditions for all terminals Saturday and Sunday. We can't
rule out a shower or thunderstorm near cho late Sunday into
Sunday night, which could briefly reduce conditions to MVFR.

Winds northeast around 5 knots Saturday and Saturday night. Winds
becoming easterly 5 to 10 knots Sunday.

Marine
Sca conditions expected over the waters today as the gradient
increases and a cold front nears the ohio valley. The gradient
is expected to relax overnight and remain below SCA criteria
Thursday and Friday. The front will drift over the waters on
Thursday, lingering nearby into Friday. As such, afternoon and
evening showers storms can be expected, some of which will
deliver strong gusty winds.

No marine hazards expected Saturday and Sunday. Winds northeast
around 5 knots Saturday and Saturday night. Winds becoming easterly
around 10 knots Sunday into Sunday evening.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

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

Small craft advisory from 9 am this morning to midnight edt
tonight for anz532>534-537-540-541-543.

Synopsis... Bkf
near term... Bkf
short term... Bkf
long term... Klw
aviation... Bkf klw
marine... Bkf klw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BSLM2 - Chesapeake Bay, MD 8 mi136 min Calm 70°F 1015 hPa69°F
APAM2 - 8575512 - Annapolis, MD 11 mi46 min 77°F 1014.9 hPa (-0.0)
TPLM2 - Thomas Point, MD 11 mi46 min S 7 G 8.9 75°F 83°F1016.5 hPa (-0.0)72°F
CPVM2 16 mi46 min 77°F 76°F
WASD2 - 8594900 - Washington, DC 20 mi46 min SSW 5.1 G 7 74°F 84°F1015.3 hPa (-0.0)
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 24 mi46 min S 5.1 G 6 74°F 1015.2 hPa (-0.0)
FSNM2 24 mi52 min S 4.1 G 5.1 74°F 1015.3 hPa
44062 - Gooses Reef, MD 26 mi58 min SW 12 G 14 78°F 1016.4 hPa
BLTM2 - 8574680 - Baltimore, MD 26 mi46 min SW 1.9 G 4.1 74°F 84°F1014.8 hPa (-0.0)
TCBM2 - 8573364 - Tolchester Beach, MD 31 mi46 min S 5.1 G 8 76°F 85°F1015.6 hPa (-0.0)
COVM2 - 8577018 - Cove Point LNG Pier, MD 37 mi46 min SSW 12 G 15 76°F 1016.3 hPa (-0.0)
CA2 - 8571892 - Cambridge, MD 38 mi52 min SSE 2.9 G 4.1 75°F 84°F1015.8 hPa
SLIM2 - 8577330 - Solomons Island, MD 41 mi46 min SW 8 G 9.9 77°F 83°F1015.4 hPa (-0.0)
NCDV2 44 mi52 min SW 5.1 G 7 74°F 87°F1014.9 hPa

Wind History for Washington, DC
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD11 mi52 minSSE 510.00 miFair76°F69°F79%1015.5 hPa
Camp Springs / Andrews Air Force Base, MD12 mi50 minSW 610.00 miFair71°F69°F95%1016 hPa
Fort Meade / Tipton, MD15 mi64 minN 07.00 miFair64°F64°F100%1016.3 hPa
College Park Airport, MD16 mi63 minN 05.00 miFair0°F0°F%1015.2 hPa
Bay Bridge Field, MD18 mi66 minSSW 410.00 miFair73°F71°F94%1015.6 hPa
Washington/Reagan National Airport, DC, VA20 mi54 minSSW 610.00 miMostly Cloudy73°F68°F84%1015.5 hPa
Baltimore, Baltimore-Washington International Airport, MD21 mi52 minN 010.00 miMostly Cloudy71°F69°F94%1015 hPa

Link to 5 minute data for KNAK

Wind History from NAK (wind in knots)
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Last 24hrN43NE5E3SE4SE7SE5SE4E5--33CalmW5Calm----------3CalmS4S5
1 day ago4N3NW5--N3SE10SE10
G17
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G17
Calm3CalmSE7Calm------N5SW4--CalmW3Calm
2 days agoSW4--E5SE8SE9SE9SE12S11S13
G19
SE10S9S4S7S4CalmW8--NW4--Calm----CalmS4

Tide / Current Tables for Rhode River (County Wharf), Maryland
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Rhode River (County Wharf)
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Wed -- 03:13 AM EDT     0.74 feet Low Tide
Wed -- 06:24 AM EDT     Sunrise
Wed -- 08:52 AM EDT     1.37 feet High Tide
Wed -- 11:56 AM EDT     Moonset
Wed -- 03:06 PM EDT     0.38 feet Low Tide
Wed -- 07:52 PM EDT     Sunset
Wed -- 09:49 PM EDT     1.54 feet High Tide
Wed -- 11:12 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.90.80.70.80.911.21.31.41.31.10.90.60.50.40.40.60.81.11.31.51.51.5

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Wed -- 01:16 AM EDT     -0.00 knots Slack
Wed -- 04:12 AM EDT     -0.61 knots Max Ebb
Wed -- 06:24 AM EDT     Sunrise
Wed -- 07:20 AM EDT     0.00 knots Slack
Wed -- 10:05 AM EDT     0.50 knots Max Flood
Wed -- 11:55 AM EDT     Moonset
Wed -- 12:49 PM EDT     -0.00 knots Slack
Wed -- 04:06 PM EDT     -0.67 knots Max Ebb
Wed -- 07:11 PM EDT     0.00 knots Slack
Wed -- 07:52 PM EDT     Sunset
Wed -- 10:37 PM EDT     0.81 knots Max Flood
Wed -- 11:11 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.1-0.2-0.5-0.6-0.6-0.4-0.10.20.40.50.40.2-0.1-0.3-0.6-0.7-0.6-0.4-0.10.30.60.80.8

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 (7,2,3,4)
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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.