Wednesday, October17, 2018 L-36.com


Marine Weather and Tides
Rock Hall, MD

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:17AMSunset 6:25PM Wednesday October 17, 2018 5:09 AM EDT (09:09 UTC) Moonrise 1:59PMMoonset 12:00AM Illumination 54% Phase: First Quarter Moon; Moon at 8 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- 435 Am Edt Wed Oct 17 2018
.small craft advisory in effect from 11 am edt this morning through Thursday afternoon...
Rest of the overnight..W winds 10 kt. Waves 1 ft.
Today..W winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft.
Tonight..NW winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
Thu..NW winds 15 kt with gusts to 25 kt. Waves 2 to 3 ft.
Thu night..NW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft.
Fri..SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
Fri night..SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 to 3 ft. Showers likely.
Sat..W winds 10 to 15 kt. Waves 2 to 3 ft. Showers likely, mainly in the morning.
Sun..NW winds 10 to 15 kt. Waves 2 to 3 ft.
ANZ500 435 Am Edt Wed Oct 17 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will pass through the waters late today and high pressure will build overhead for Thursday before moving offshore Friday. Another cold front will pass through the waters Saturday. Small craft advisories will likely be needed Friday afternoon through Sunday.


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 170759
afdlwx
area forecast discussion
national weather service baltimore md washington dc
359 am edt Wed oct 17 2018

Synopsis A cold front will cross the area late today.

High pressure will build over the area tonight through Thursday
night and then move offshore Friday. Another cold front will
pass through Saturday and high pressure will build overhead for
early next week.

Near term through tonight
Light rain over st. Marys county will exit by daybreak with
clouds thining out and skies becoming clear by midday. A mild
afternoon is expected with highs in the low to mid 60s, a few
degs higher than yesterday. A dry cold front will then cross
the area late in the afternoon and bring coolest air of the
fall season so far. Lows tonight will be in the 40s east of the
blue ridge with sub-freezing temperatures expected over the
higher elevations as h85 temps drop to -6c. It will become windy
late this afternoon and evening with gusts up to 30 mph with
frontal passage with a gradual decrease in winds overnight.

Freeze warning was issued for the higher elevs.

Short term Thursday through Friday night
High pressure will gradually build from the west Thu with
pressure gradient relaxing and winds diminishing somewhat. Still
breezy with gusts to 25 mph and with temperatures only rising
into the low to mid 50s. Chilly Thu night with diminishing
winds. Lows in the mid to upper 30s and below freezing west of
the blue ridge. Additional frost advisories and freeze warnings
will be required.

Warmer Fri as high pressure shifts offshore and winds turn
southerly. Showers are expected Fri night ahead of another
cold front.

Long term Saturday through Tuesday
Cool autumnal weather will be featured for the weekend and into
early next week with temperatures skewing below normal.

A low pressure system will be moving well north of the region
through canada on Saturday, with its attendant cold front crossing
through the area during the day. Rain shower chances will linger
into Saturday morning before drying west to northwest flow then
takes over by the afternoon and evening. While this will dry most
locations out, it will help keep upslope rain showers going along
the allegheny front. Breezy conditions are expected for the second
half of the day with highs in the 60s. A potent upper level trough
will then move through Saturday evening and Saturday night as a
secondary cold front pushes across the area. This will keep upslope
precipitation going through the night, changing some of that over to
snow showers across the higher elevations. Elsewhere, dry and
blustery conditions expected Saturday night with lows in the 40s.

Northwest flow will then dominate for Sunday behind the departing
system before high pressure returns for Sunday night and Monday. Dry
and cool conditions are expected, with temperatures about 10-12
degrees below normals, highs in the 50s and lows in the 20s and 30s.

Warm air advection will begin later Monday and Monday night as a
clipper system dives north of the area Tuesday. This will promote
moderating temperatures with highs on Tuesday in the 50s 60s.

Aviation 08z Wednesday through Sunday
Gusty W winds developing later today becoming NW late with FROPA with
gusts up to 25 kt. Winds diminish somewhat Thu with gusts up to
20 kt.

There is potential for sub-vfr conditions Saturday morning as a
system moves through with chances for rain showers.VFR will return
Saturday afternoon through Sunday with developing gusty west to
northwest winds.

Marine
Sca conditions developing later this morning, then winds
increase up to 30 kt this evening and continue through the
night. SCA conditions will persist through thu. Winds drop below
sca Thu night and increase again Fri night.

Sca conditions are probable Saturday, Saturday night, and Sunday as
west to northwest winds increase behind a departing system and
strong cold front.

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... Freeze warning from midnight tonight to 11 am edt Thursday for
vaz503-504.

Wv... Freeze warning from midnight tonight to 11 am edt Thursday for
wvz501-505-506.

Marine... Small craft advisory from 11 am this morning to 6 pm edt
Thursday for anz530>534-537>543.

Small craft advisory from 11 am this morning to 6 am edt
Thursday for anz535-536.

Small craft advisory from 10 am to 6 pm edt Thursday for
anz535-536.

Synopsis... Lfr
near term... Lfr
short term... Lfr
long term... Mm
aviation... Mm lfr
marine... Mm lfr


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCBM2 - 8573364 - Tolchester Beach, MD 7 mi40 min W 8 G 12 59°F 64°F1017.6 hPa
FSNM2 10 mi40 min W 5.1 G 8 56°F 1017.2 hPa
CPVM2 11 mi40 min 59°F 53°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 11 mi40 min WNW 5.1 G 5.1 56°F 1017.5 hPa
APAM2 - 8575512 - Annapolis, MD 13 mi40 min 56°F 1017.1 hPa
44063 - Annapolis 13 mi34 min W 7.8 G 9.7 57°F 1018 hPa
BLTM2 - 8574680 - Baltimore, MD 15 mi40 min Calm G 1.9 54°F 70°F1017.2 hPa
TPLM2 - Thomas Point, MD 18 mi70 min WSW 9.9 G 11 57°F 68°F1018.3 hPa (-1.4)51°F
BSLM2 - Chesapeake Bay, MD 32 mi100 min S 1 54°F 1018 hPa51°F
CHCM2 - 8573927 - Chesapeake City, MD 39 mi40 min SW 1.9 G 1.9 52°F 64°F1017.4 hPa
WASD2 - 8594900 - Washington, DC 40 mi40 min NW 5.1 G 5.1 57°F 65°F1018 hPa
44062 - Gooses Reef, MD 41 mi40 min W 7.8 G 9.7 58°F 1018.2 hPa
CA2 - 8571892 - Cambridge, MD 42 mi40 min 55°F 69°F1018.6 hPa
DRSD1 - Delaware Reserve, DE 49 mi100 min Calm 53°F 1018 hPa51°F

Wind History for Tolchester Beach, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay Bridge Field, MD12 mi30 minWSW 710.00 miOvercast57°F51°F82%1017.6 hPa
Baltimore / Martin, MD14 mi28 minN 010.00 miFair52°F50°F94%1018.3 hPa
Annapolis, United States Naval Academy, MD14 mi16 minWNW 310.00 miFair58°F50°F75%1017.8 hPa
Baltimore, Inner Harbor, MD16 mi16 minno data mi54°F48°F80%1017.8 hPa
Baltimore, Baltimore-Washington International Airport, MD17 mi16 minW 410.00 miMostly Cloudy50°F48°F96%1017.7 hPa
Fort Meade / Tipton, MD23 mi28 minN 010.00 miFair48°F46°F94%1018.6 hPa

Wind History from MTN (wind in knots)
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NW8NW8NW7NW8NW6NW5NW7W3W7W6W7W7W7CalmCalmCalmS3CalmCalmSW3CalmCalmCalm
1 day agoS7S7S8S7S5S5S6SW6SW6SE3S9S4CalmCalmCalmCalmSW11SW7SW6W16
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2 days agoCalmCalmNW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE3CalmSE4

Tide / Current Tables for Baltimore (Chesapeake Bay), Maryland
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Baltimore (Chesapeake Bay)
Click for Map
Wed -- 12:14 AM EDT     Moonset
Wed -- 01:34 AM EDT     5.56 feet High Tide
Wed -- 07:17 AM EDT     Sunrise
Wed -- 08:46 AM EDT     4.52 feet Low Tide
Wed -- 02:06 PM EDT     5.03 feet High Tide
Wed -- 02:58 PM EDT     Moonrise
Wed -- 06:23 PM EDT     Sunset
Wed -- 07:37 PM EDT     4.47 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.45.55.55.45.35.14.94.74.64.54.64.74.85554.94.74.64.54.54.64.85

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Wed -- 12:15 AM EDT     Moonset
Wed -- 03:10 AM EDT     -0.00 knots Slack
Wed -- 06:35 AM EDT     -0.81 knots Max Ebb
Wed -- 07:17 AM EDT     Sunrise
Wed -- 10:11 AM EDT     0.00 knots Slack
Wed -- 12:58 PM EDT     0.51 knots Max Flood
Wed -- 02:58 PM EDT     Moonrise
Wed -- 03:58 PM EDT     -0.00 knots Slack
Wed -- 06:23 PM EDT     Sunset
Wed -- 06:42 PM EDT     -0.44 knots Max Ebb
Wed -- 09:20 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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0.80.70.40.1-0.3-0.6-0.8-0.8-0.6-0.4-0.10.20.40.50.40.2-0-0.2-0.4-0.4-0.3-0.10.20.5

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Mid-Atlantic    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 (5,6,7,8)
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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.