Marine Weather and Tides
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
|Sunrise 6:21AM||Sunset 7:53PM||Saturday August 19, 2017 7:01 AM EDT (11:01 UTC)||Moonrise 2:51AM||Moonset 5:27PM||Illumination 8%|
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|ANZ540 Eastern Bay- 535 Am Edt Sat Aug 19 2017 |
.small craft advisory in effect until 9 am edt this morning...
Today..NW winds 5 to 10 kt with gusts to 20 kt... Becoming sw late. Waves 1 ft.
Tonight..N winds around 5 kt. Waves 1 ft or less.
Sun..SW winds around 5 kt. Waves flat.
Sun night..SE winds around 5 kt. Waves flat.
Mon..S winds around 5 kt. Waves flat.
Mon night..S winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Tue..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Wed..NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms.
|ANZ500 535 Am Edt Sat Aug 19 2017 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Weak high pressure will build over the waters through this afternoon. A weak reinforcing cold front will pass through the area this evening and high pressure will return for Sunday. The high will move offshore Monday and a stronger cold front will approach Tuesday before passing through Wednesday. High pressure will build overhead behind this boundary. Small craft advisories may be needed Monday night through Tuesday night...and they will likely be needed Wednesday into Wednesday night.
7 Day Forecast for Marine Location Near Queen Anne, MDHourly EDIT Help
Area Discussion for - Philadelphia/Mount Holly, PA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kphi 190828 cca|
area forecast discussion... Corrected
national weather service mount holly nj
428 am edt Sat aug 19 2017
A cold front will move through the region this morning. High
pressure will build in from the midwest tonight. This high will move
overhead Sunday and then progress offshore Monday into Tuesday. An
area of low pressure is expected to pass well to our north for
midweek but not before its cold front moves through the region on
Wednesday. Canadian high pressure building into the mid atlantic on
Thursday will likely influence our weather through early next
Near term until 6 pm this evening
A few light isolated showers across southern delaware early this
morning but other than that, we should be mainly dry as we get the
Warm and muggy conditions continue early this morning as plenty
of low-level moisture remains across the region. The cold front
is slowly pushing through eastern pennsylvania and should make it
through our area after sunrise this morning. Fog and low clouds
have developed and will remain across the region until the front
moves through. Once the front moves through this morning, we
will start to see dewpoints drop and the mugginess wane.
Behind the front, some drier air will filter in the west to
northwest flow and it will feel much more comfortable outside as
dewpoints drop around 10 degrees into the lower 60s. The fog and low
clouds should clear out through the morning and skies will start to
clear from northwest to southeast through this afternoon.
Temperatures will remain warm as the airmass isn't notably cooler
behind the front. Temperatures will rise back into the mid 80s to
around 90 across the forecast area.
Short term 6 pm this evening through 6 am Sunday
The axis of the upper trough will cross the region tonight with a
shortwave rotating through the area with it. The models continue to
show some moisture crossing the region with the shortwave upper
trough. It appears that the moisture peters out before reaching the
majority of our area and only a few showers, possibly an isolated
thunderstorm, may reach the lehigh valley, poconos and northwest
Overnight lows will generally be in the 60s across the region,
closer to 70 in philadelphia and along the coast.
Long term Sunday through Friday
High pressure centered over the ohio valley Sunday morning will move
overhead by Sunday night. The high will gradually shift off the
coast on Monday, but not before it provides us with consecutive days
of dry weather and seasonably warm temperatures (highs in the mid to
upper 80s both days). An uptick in humidity will occur on Monday in
response to the light southerly return flow that develops on the
western periphery of the surface high.
Due to popular demand, spent a little extra time than usual
analyzing moisture fields from various models before constructing
cloud cover forecast for Monday afternoon. We are advertising a
mostly sunny sky during the 1-4 pm timeframe when the solar
eclipse will be viewable in our area. However, there are a couple
of things to watch out for that could provide a source of clouds:
1) there will likely be high-level cirrus streaming in from the
west with a subtle upper-level jet streak passing by but it should
generally be scattered and or thin enough to not impede viewing of
the eclipse. 2) daytime heating will result in the development of
cumulus (cu). Based on the newest 00z guidance, expect these
lower-based clouds to be scattered across a majority of the area,
allowing most sky gazers to have a unobstructed view of the
eclipse. However, with increasing moisture in boundary layer, it
is still too soon to rule out a broken CU deck that could impact
viewing, especially south and west of philadelphia where mixing
ratios and rh values are higher at the top of the boundary layer
between at 18z and 21z. It will also be interesting to see how the
temporary lull in insolation during the solar eclipse will affect
cloud cover- one would expect the diurnally-driven CU to decrease
around and just after totality in a similar manner to what happens
near sunset on a normal day.
Our next chance for precip looks to be Monday night when a weak
shortwave trough embedded within a corridor of stronger westerlies
residing to the north of the southern CONUS upper ridge is
predicted to pass through the region. This disturbance could
provide enough lift to support elevated convection into the night,
especially across DELMARVA and southern nj where the airmass will
be more moist and less stable compared to more northern locations.
Low pressure is expected to deepen midweek as it tracks
northeastward across the great lakes and into the st. Lawrence
valley. Meanwhile, shortwave energy digging around the backside
of the synoptic trough will lead to amplification of this
upstream trough. In this pattern, chances for showers and storms
will increase going into Tuesday and Wednesday. The focus for|
convective development Tuesday afternoon will be along a pre-
frontal trough that is forecast to sharpen to the lee of the
mountains. Tuesday looks to be the hottest day of the period
(lower 90s along and south of the urban i-95 corridor) with the
warm sector becoming established over the area in advance of the
cold front. The best opportunity for rain looks to be Tuesday
night and Wednesday in concert with the arrival of the cold
front. Note, models are in remarkably good agreement
(considering its still five days out) with the position and
timing of the surface low and attendant cold front.
Expansive high pressure builds in from the great lakes late in the
week and into the start of next weekend. The Thursday-Saturday
period is currently forecast to be dry with slightly below normal
temperatures,. However, we will have to monitor the potential for
the front that moves through midweek to stall nearby, which
frequently occurs in summer.
Aviation 08z Saturday through Wednesday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.
Early this morning... Variable conditions continue across the
terminals withVFR MVFR ifr all being noted at times this
morning. Low level moisture remains across the region and low
clouds and fog have developed. Conditions will improve toVFR
this morning as a cold front pushes through from west to east.
Rest of today and tonight...VFR conditions are expected. Light
west to southwest winds this morning will become west to
northwest around 5 to 10 knots with a few gusts around 15 knots
this afternoon. Winds will become light and variable overnight
tonight. An isolated shower or thunderstorm possible this
afternoon near krdg kabe.
Sunday through Monday night...VFR. NW 5-10 kt on Sunday, becoming
calm after sunset, then s-sw 5-10 kt on Monday.
Tuesday... MainlyVFR. Low chance for showers and storms with the
potential for convective development being slightly more favorable
over western-most terminals. S-sw winds 5-10 kt with gusts 15-20 kt
during the afternoon.
Tuesday night and Wednesday... Increasing chances for showers and
storms with the approach of a cold front. This activity will bring a
risk for temporary localized restrictions belowVFR. Expect a wind
shift from s-sw to NW to occur on Wednesday with fropa.
Wednesday night... Improving conditions from NW to SE behind the
Tranquil conditions will continue across the area waters through
tonight. West to southwest winds around 10 to 15 knots with a few
gusts around 20 knots through tonight.
Sunday through Tuesday... Winds and seas will be well below sca
Tuesday night... SCA possible with sly flow strengthening ahead of
cold front. Seas may also build to near 5 ft in our coastal waters.
Wednesday... Winds veer from s-sw to W with the arrival of a cold
front. Wind speeds should be below 20 kt but it may take time for
seas in the coastal waters to drop below 5 ft during the morning.
Wednesday night... Nw winds could briefly approach 25 kt in post-
frontal pressure surge.
the rip current risk for today is low at the new jersey shore and
Phi watches warnings advisories
near term... Meola
short term... Meola
long term... Klein
aviation... Klein meola
marine... Klein meola
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|CPVM2||24 mi||44 min||77°F||76°F|
|CA2 - 8571892 - Cambridge, MD||25 mi||44 min||75°F||81°F||1011.5 hPa|
|TCBM2 - 8573364 - Tolchester Beach, MD||26 mi||44 min||NNW 11 G 15||79°F||80°F||1010.9 hPa|
|TPLM2 - Thomas Point, MD||26 mi||62 min||NW 12 G 14||78°F||80°F|
|44063 - Annapolis||27 mi||32 min||SE 12 G 16|
|APAM2 - 8575512 - Annapolis, MD||28 mi||44 min||77°F||1010.1 hPa|
|44043 - Patapsco, MD||28 mi||32 min||NW 9.7 G 14||79°F||1011.2 hPa|
|DRSD1 - Delaware Reserve, DE||30 mi||152 min||SSW 2.9||73°F||1010 hPa||73°F|
|44062 - Gooses Reef, MD||35 mi||32 min||WNW 5.8 G 7.8||79°F||1011.8 hPa|
|FSKM2 - 8574728 - Francis Scott Key Bridge, MD||37 mi||44 min||WNW 9.9 G 11||78°F||1010.5 hPa|
|SJSN4 - 8537121 - Ship John Shoal, NJ||40 mi||44 min||W 7 G 8||76°F||79°F||1009.9 hPa|
|BLTM2 - 8574680 - Baltimore, MD||41 mi||44 min||NNW 7 G 9.9||78°F||83°F||1010.4 hPa|
|BSLM2 - Chesapeake Bay, MD||41 mi||152 min||Calm||66°F||1010 hPa||66°F|
|CHCM2 - 8573927 - Chesapeake City, MD||43 mi||50 min||WNW 8 G 9.9||76°F||82°F||1010.7 hPa|
|44057 - Susquehanna, MD||43 mi||32 min||NW 7.8 G 9.7||77°F||1010.5 hPa|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||43 mi||44 min||NW 8 G 8.9||77°F||1011.6 hPa|
|BRND1 - 8555889 - Brandywine Shoal Light, DE||45 mi||50 min||W 8.9 G 11||75°F||1010.7 hPa|
|LWSD1 - 8557380 - Lewes, DE||45 mi||50 min||W 4.1 G 5.1||75°F||77°F||1010 hPa|
|RDYD1 - 8551910 - Reedy Point, DE||48 mi||44 min||75°F||81°F||1010 hPa|
|SLIM2 - 8577330 - Solomons Island, MD||49 mi||50 min||WNW 4.1 G 5.1||77°F||81°F|
|BISM2 - 8571421 - Bishops Head, MD||49 mi||44 min||WNW 8 G 8.9||79°F||81°F||1011.3 hPa|
Wind History for Cambridge, MD(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Easton / Newman Field, MD||10 mi||89 min||N 0||10.00 mi||Fair||0°F||0°F||%||1011.5 hPa|
|Bay Bridge Field, MD||21 mi||77 min||NW 9||10.00 mi||Mostly Cloudy||77°F||71°F||83%||1010.5 hPa|
Wind History from ESN (wind in knots)
|1 day ago||Calm||Calm||S||S||S||SW||S||S||S||S||S||SW||S||S||S||S||S||S||S||S||S||S||S|
|2 days ago||Calm||Calm||Calm||Calm||Calm||W||NW||W||Calm||N||Calm||Calm||SE||SE||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
Click for Map
Sat -- 12:06 AM EDT -0.01 feet Low Tide
Sat -- 03:51 AM EDT Moonrise
Sat -- 06:21 AM EDT Sunrise
Sat -- 06:32 AM EDT 2.75 feet High Tide
Sat -- 12:49 PM EDT 0.44 feet Low Tide
Sat -- 06:26 PM EDT Moonset
Sat -- 06:36 PM EDT 2.27 feet High Tide
Sat -- 07:52 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Baltimore Harbor Approach |
Click for Map
Sat -- 03:24 AM EDT 1.15 knots Max Flood
Sat -- 03:52 AM EDT Moonrise
Sat -- 06:22 AM EDT Sunrise
Sat -- 06:54 AM EDT -0.00 knots Slack
Sat -- 10:08 AM EDT -1.00 knots Max Ebb
Sat -- 01:41 PM EDT 0.00 knots Slack
Sat -- 04:12 PM EDT 0.57 knots Max Flood
Sat -- 06:28 PM EDT Moonset
Sat -- 06:50 PM EDT -0.00 knots Slack
Sat -- 07:54 PM EDT Sunset
Sat -- 09:54 PM EDT -0.74 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Mid-Atlantic EDIT
Wind Forecast for Philadelphia/Mount Holly, PA (7,2,3,4)(on/off)  Help
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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.