Tuesday, April23, 2019 L-36.com


Marine Weather and Tides
Secretary, 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 6:15AMSunset 7:49PM Tuesday April 23, 2019 6:38 AM EDT (10:38 UTC) Moonrise 11:24PMMoonset 8:24AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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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ANZ541 Choptank River To Cambridge Md And The Little Choptank River- 435 Am Edt Tue Apr 23 2019
Rest of the overnight..NW winds 5 kt. Waves less than 1 ft.
Today..S winds 5 to 10 kt. Waves 1 ft.
Tonight..SW winds 10 kt. Waves 1 ft.
Wed..NW winds 5 to 10 kt. Waves 1 ft.
Wed night..NW winds 5 to 10 kt. Waves 1 ft.
Thu..SW winds around 5 kt. Waves 1 ft or less. A chance of showers.
Thu night..S winds 5 to 10 kt. Waves 1 ft. Showers likely.
Fri..SW winds 10 to 15 kt...becoming nw. Waves 1 to 2 ft. Showers.
Sat..SW winds 5 to 10 kt. Waves 1 to 2 ft.
ANZ500 435 Am Edt Tue Apr 23 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build over the southeastern united states today. A cold front will approach from the ohio valley tonight, stall just south of the region Wednesday, then return north as a warm front Thursday as low pressure tracks from the ohio valley toward the northeastern united states. A cold front will follow for Friday. Small craft advisories may be needed for portions of the waters Wednesday, and again on Friday.


7 Day Forecast for Marine Location Near Secretary, MD
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location: 38.57, -76     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 230731
afdphi
area forecast discussion
national weather service mount holly nj
331 am edt Tue apr 23 2019

Synopsis
Weak high pressure will build across our area today while low
pressure moves across the great lakes. A cold front attached
to this low will cross our area late tonight. An area of high
pressure will build back across the area later Wednesday and remain
into Thursday. Another low and its associated fronts will move in
for the end of the work week. High pressure will return for the
weekend.

Near term until 6 pm this evening
A short wave ridge will slide over the region today, bringing a
brief break in between the departing low which was over our region
since late last week and the approaching low that will be bringing a
cold front to the area late tonight. A combination of the shortwave
ridging and low level southwesterly flow for much of the day will
result in temperatures 10 to 15 degrees above normal for most of the
region, with highs mostly in the 70s to near 80. The one exception
is along the coast, where an afternoon seabreeze could keep
temperatures in the 60s.

Short term 6 pm this evening through 6 am Wednesday
The main low will be well north of our region overnight (mostly over
quebec). Consequently, the best lift will stay north and west of our
region as a cold front moves through late tonight. Even so, lift
along the front should be sufficient for isolated to scattered
showers along and ahead of the front. With some meager elevated
instability, I can't rule out a thunderstorm or two, though any
precip should mostly be plain rain showers. Given the limited window
of opportunity for rain and the limited lift, rain amounts will
likely be light - less than a quarter of an inch.

Long term Wednesday through Monday
Wed thru Thursday... Weak high pressure will build across the
area, so a period of dry weather is expected. Highs both days
will be in the upper 60s to low 70s, so readings will be a
little above normal.

Thu night thru fri... Scattered showers and perhaps few tstms
possible as low pressure and an upper h5 trough cross the area.

Pops in the high chc and low likely range ATTM with Friday
having the greatest chances. Temperatures will remain a little
above normal thru the period.

Sat sun... More high pressure returns, so more dry weather
expected. A couple showers far N W Sunday afternoon possible,
but confid in this is low attm. Temperatures fall back to near
normal with highs mostly in the mid upper 60s.

Monday... Sct showers possible, but confid in fcst this far out
is poor. Temperatures probably near normal.

Aviation 07z Tuesday through Saturday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Today...VFR conditions are expected. Light and variable winds will
eventually settle out of the southwest by this afternoon, but remain
near or below 10 kt. The one exception is kacy and kmiv where an
afternoon seabreeze could shift winds to southerly or even south
southeasterly. The timing of when the sea breeze may develop or how
far inland it may reach is uncertain.

Tonight... MostlyVFR conditions are expected. There is a chance for
showers and a lesser chance for thunderstorms. If showers or storms
move directly over a TAF site, then brief MVFR conditions will be
possible. Winds should start southwesterly near or below 10 kt. Late
tonight however (likely near or after 06z), a cold front will bring
a shift to westerly and eventually northwesterly winds. A low level
southwesterly jet near the coast may result in low level wind shear
at kacy through the evening hours.

Outlook...

Wednesday Thursday... MostlyVFR.

Friday... Lower CIGS vsbys with showers. Sct tstms possible.

Saturday... MostlyVFR.

Marine
Winds and seas are expected to remain below small craft advisory
criteria today and tonight. Near dawn Tuesday morning, a cold front
will bring a shift to westerly winds.

Outlook...

wed thu... Sub-sca. Fair.

Fri... Sub-sca, but some gusts close to 25 kt. Showers sct tstms.

Saturday... Sub-sca. Fair.

Equipment
The kdix radar remains out of service as technicians continue to
troubleshoot the ongoing issues. Surrounding radars include,
kdox, kokx, klwx, kccx, kbgm and tphl.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... None.

Synopsis... O'hara
near term... Johnson
short term... Johnson
long term... O'hara
aviation... Johnson o'hara
marine... Johnson o'hara
equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CA2 - 8571892 - Cambridge, MD 4 mi44 min 57°F 64°F1017.2 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 23 mi44 min WNW 7 G 9.9 59°F 1018 hPa
BISM2 - 8571421 - Bishops Head, MD 24 mi44 min W 8 G 9.9 61°F 65°F1017.6 hPa
SLIM2 - 8577330 - Solomons Island, MD 29 mi44 min WNW 1.9 G 2.9 57°F 59°F1017 hPa
TPLM2 - Thomas Point, MD 32 mi38 min W 7 G 8 58°F 60°F1018.1 hPa (-0.3)51°F
CPVM2 36 mi44 min 59°F 51°F
APAM2 - 8575512 - Annapolis, MD 38 mi44 min 55°F 1016.8 hPa
PPTM2 - 8578240 - Piney Point, MD 41 mi80 min NW 6 G 6
TCBM2 - 8573364 - Tolchester Beach, MD 46 mi44 min Calm G 1.9 56°F 65°F1017.3 hPa
LWTV2 - 8635750 - Lewisetta, VA 47 mi44 min W 5.1 G 5.1 58°F 61°F1017.7 hPa
LWSD1 - 8557380 - Lewes, DE 49 mi44 min WSW 4.1 G 4.1 58°F 56°F1016.8 hPa

Wind History for Cambridge, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cambridge-Dorchester Airport, MD3 mi53 minN 010.00 miFair50°F50°F100%1017.3 hPa
Easton / Newman Field, MD17 mi48 minN 010.00 miClear52°F51°F100%1018.3 hPa

Wind History from CGE (wind in knots)
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N9NW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoSW4--63--S11SW7
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NW4CalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN8NW4NW4
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S7SE5SE4SE5CalmW5W3Calm----3

Tide / Current Tables for Cambridge, Choptank River, Maryland
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Cambridge
Click for Map
Tue -- 01:35 AM EDT     0.15 feet Low Tide
Tue -- 06:17 AM EDT     Sunrise
Tue -- 07:45 AM EDT     2.17 feet High Tide
Tue -- 09:25 AM EDT     Moonset
Tue -- 02:42 PM EDT     0.35 feet Low Tide
Tue -- 07:48 PM EDT     Sunset
Tue -- 08:08 PM EDT     1.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.20.20.40.81.31.82.12.221.71.30.90.60.40.40.50.81.21.61.71.61.41

Tide / Current Tables for Cove Point (1.1 mi. NE of), Maryland Current
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Cove Point (1.1 mi. NE of)
Click for Map
Tue -- 12:11 AM EDT     -0.45 knots Max Ebb
Tue -- 02:43 AM EDT     0.00 knots Slack
Tue -- 06:06 AM EDT     0.78 knots Max Flood
Tue -- 06:18 AM EDT     Sunrise
Tue -- 09:26 AM EDT     Moonset
Tue -- 09:43 AM EDT     -0.00 knots Slack
Tue -- 01:14 PM EDT     -0.72 knots Max Ebb
Tue -- 04:37 PM EDT     0.00 knots Slack
Tue -- 06:59 PM EDT     0.37 knots Max Flood
Tue -- 07:49 PM EDT     Sunset
Tue -- 09:57 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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-0.4-0.4-0.20.10.40.70.80.70.50.2-0.1-0.4-0.6-0.7-0.7-0.5-0.20.10.30.40.30.2-0-0.2

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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Wind Forecast for Philadelphia/Mount Holly, PA (6,6,7,8)
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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.