Marine Weather and Tides
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 5:38AM||Sunset 8:34PM||Friday June 23, 2017 4:43 PM EDT (20:43 UTC)||Moonrise 4:20AM||Moonset 7:04PM||Illumination 0%|
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|ANZ540 Eastern Bay- 432 Pm Edt Fri Jun 23 2017 |
.small craft advisory in effect through Saturday afternoon...
Rest of this afternoon..SW winds 15 kt with gusts to 25 kt. Waves 2 ft. Scattered showers with isolated tstms.
Tonight..SW winds 15 kt with gusts to 25 kt. Waves 2 ft. Showers likely. Vsby 1 nm or less.
Sat..W winds 10 to 15 kt. Gusts up to 25 kt. Waves 2 ft. A chance of showers.
Sat night..NW winds 5 to 10 kt. Waves 1 to 2 ft.
Sun..NW winds 5 to 10 kt. Waves 1 ft.
Sun night..W winds 5 kt. Waves less than 1 ft.
Mon..NW winds 5 to 10 kt. Waves 1 ft.
Tue..NW winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
|ANZ500 432 Pm Edt Fri Jun 23 2017 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will remain offshore today while a cold front slowly approaches from the northwest. The remnants of cindy will track along the front tonight, with the front finally pushing through on Saturday. A weak secondary front will cross Sunday before high pressure returns early next week. Small craft advisory conditions are possible Sunday.
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 231943|
area forecast discussion
national weather service mount holly nj
343 pm edt Fri jun 23 2017
A cold front over the midwest states this afternoon will move
through the region on Saturday. Meanwhile, remnant tropical moisture
will stream northeastward ahead of the front. High pressure builds
in from the great plains and midwest region for the second half of
the weekend. A weak cold front is expected to move through the
region Monday night or Tuesday. High pressure returns to the area
for the middle of next week before moving off the coast late in the
Near term until 6 am Saturday morning
Not many changes from the previous forecast. We still expect to
see scattered showers and thunderstorms to move into our region
from the west over the next several hours. Any clearing this
afternoon has been mostly self-destructive as cumulus fields
have developed quickly when there has been any clearing (except
over DELMARVA - where a stronger cap is in place). As a result,
we are slightly cooler than previously expected at the surface.
However, still warm enough for ml CAPE values above 500 j kg
across our region. In addition, a favorable wind profile with
increasing amounts of 0-6 km shear (primarily speed shear, as
flow above 900 mb is nearly unidirectional). Thus, there remains
a marginal to slight risk for severe storms over our region
through the evening hours.
Once we get to late this evening, we should see a brief lull as the
short wave trough weakens and the boundary layer stabilizes. After
midnight though, the cold front is expected to approach the region
from the west, and just ahead of this front, we should see one more
round of showers and thunderstorms. By tonight, the threat shifts
from strong winds to heavy downpours. However, the progressive
nature of the front should limit any flooding threat.
Short term 6 am Saturday morning through 6 pm Saturday
The biggest difference with the latest model runs was how much
faster most models bring the front through the area, with many
models showing it clearing the coast by 12z. I'm not sure it will
move through that quickly, but did trend faster. This has not only
implications for how quickly we dry out (likely should see dry
conditions across the region by late morning), but also in the wind
forecast and with the MAX temperature forecast (chose to go closer
to the cooler operational models than the MOS guidance).
Long term Saturday night through Friday
The large-scale pattern over the CONUS will feature an upper trough
east of the rockies and an upstream ridge through early next week.
For our area, this pattern will 1) allow for a break in the active
stretch of weather we have had recently and 2) keep us far away from
the heart of the summer heat (western conus).
A cold front will slowly approach from the northwest Monday before
moving through the forecast area sometime either Monday night or
Tuesday morning. Meanwhile, a series of shortwave disturbances
rounding the base of great lakes upper trough may provide a source
of deeper lift for showers both days. The bulk of the forcing for
ascent looks to remain upstream of our area on Monday, so it is
likely that any diurnally-driven convection will be sparse in
coverage and confined to the higher terrain N W of the fall line.
There is no mention of thunder in the forecast for Monday as
soundings from both the NAM and GFS do not indicate a favorable
environment for sustained deep convection owing to limited moisture
availability and a residual capping inversion in place. Despite a
post-frontal regime, the setup may be slightly more conducive for
low-topped thunderstorms on Tuesday as a cold pool aloft that is
associated with the upper trough shifts overhead and helps steepen
the mid-level lapse rates.
Mainly dry conditions are expected Tuesday night-Thursday with high
pressure influencing our weather. Showers and storms return to the
forecast next Friday as high pressure shifting offshore and the next
low pressure system approaches from the west. Kept pops low (20-30
percent) for Friday given the considerable model disagreement on d7.
Temperatures will be slightly below normal and quite comfortable for
outdoor activity with highs for most of the area in upper 70s and
lower 80s (except mid 80s on Sunday across the i-95 corridor, east)
through the middle of next week. Temperatures gradually return to
near normal late in the week as the high moves off the coast and
southerly return flow develops.
Aviation 20z Friday through Wednesday
The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg,
kmiv, kacy and surrounding areas.
MVFR and even brief ifr conditions will be possible with any showers
and thunderstorms that may move over the TAF sites. The primary
period for showers and thunderstorms will be first through 03z, and
then again between 08 and 12z (possibly going as late as 15z for the
coastal sites including kacy and kmiv).
Otherwise, mostlyVFR conditions are expected with skies clearing
Breezy southwesterly winds, with gusts up to 20 kt will be possible
through about 00z. An abrupt wind shift, winds shifting from
southwesterly to northwesterly, is expected with a cold front
moving over the area generally between 10 and 15z.
Saturday night through Monday morning...VFR. Winds primarily out of
the W or nw.
Monday afternoon through Tuesday... MostVFR but sub-vfr restrictions
still a possibility, especially on Tuesday in locally heavier
Tuesday night and Wednesday...VFR.
Sca conditions, for both winds and seas are expected to continue
tonight and tomorrow. An abrupt wind shift from southwesterly to
northwesterly winds is expected by mid day Saturday. Winds may
diminish a bit behind the front, but seas are expected to remain
elevated through much of the day.
Saturday night... Did not extend the current SCA into Saturday night
with seas likely to drop below 5 ft in our coastal atlantic waters.
W-sw winds around 10 kt early in the evening shift to NW behind a
Sunday through Wednesday... Winds and seas are expected to remain
below SCA criteria. An isolated TSTM possible on Tuesday.
a moderate risk for the formation of dangerous rip currents
continues today for the nj shore. For tomorrow, winds will be
shifting off shore, but a 5 to 6 ft swell may lead to a moderate
risk for the formation of dangerous rip currents especially
along the central and southern nj shore. For the northern nj
shore and the delaware beaches, the risk is expected to be low
at this time. However, even with a low risk... The bigger diurnal
difference in the tide cycle due to the new moon today could
mean some rapidly changing conditions.
Tides coastal flooding
Very high astronomical tides will continue through the next few days
in association with the new moon today. However, flow should be
shifting more offshore, so though spotty minor tidal flooding
is possible with this afternoon evening's high tide, the threat
for widespread minor tidal flooding has diminished.
Phi watches warnings advisories
Marine... Small craft advisory until 6 pm edt Saturday for anz450>455.
Small craft advisory until 9 pm edt this evening for anz430-
near term... Johnson
short term... Johnson
long term... Klein
marine... Johnson klein
tides coastal flooding... Johnson
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||83°F||74°F|
|CA2 - 8571892 - Cambridge, MD||25 mi||44 min||85°F||82°F||1009.1 hPa (-0.9)|
|TCBM2 - 8573364 - Tolchester Beach, MD||26 mi||44 min||SSW 8.9 G 18||85°F||82°F||1006.6 hPa (-1.6)|
|TPLM2 - Thomas Point, MD||26 mi||44 min||SW 23 G 26||83°F||78°F|
|44063 - Annapolis||27 mi||34 min||WSW 18 G 23||84°F||1 ft||1006.8 hPa|
|APAM2 - 8575512 - Annapolis, MD||28 mi||44 min||88°F||1006.4 hPa (-1.4)|
|44043 - Patapsco, MD||28 mi||34 min||SW 19 G 23||84°F||2 ft||1006.9 hPa|
|DRSD1 - Delaware Reserve, DE||30 mi||89 min||SSW 9.9||87°F||1007 hPa||74°F|
|44062 - Gooses Reef, MD||35 mi||34 min||WSW 7.8 G 9.7||82°F||2 ft||1008.8 hPa|
|FSKM2 - 8574728 - Francis Scott Key Bridge, MD||37 mi||44 min||SSW 19 G 22||85°F||1005.4 hPa (-2.1)|
|FSNM2||37 mi||44 min||SW 8.9 G 18||85°F||1006.2 hPa (-1.8)|
|SJSN4 - 8537121 - Ship John Shoal, NJ||40 mi||44 min||SW 23 G 28||85°F||78°F||1006.2 hPa (-1.7)|
|BSLM2 - Chesapeake Bay, MD||41 mi||134 min||SSW 8||82°F||1008 hPa||72°F|
|BLTM2 - 8574680 - Baltimore, MD||41 mi||44 min||WSW 6 G 16||88°F||82°F||1005.4 hPa (-2.0)|
|COVM2 - 8577018 - Cove Point LNG Pier, MD||43 mi||44 min||WSW 11 G 15||84°F||1008.8 hPa (-1.2)|
|44057 - Susquehanna, MD||43 mi||34 min||SSW 18 G 23||85°F||1005.4 hPa|
|CHCM2 - 8573927 - Chesapeake City, MD||43 mi||44 min||SSE 9.9 G 15||85°F||83°F||1006.1 hPa (-2.1)|
|BRND1 - 8555889 - Brandywine Shoal Light, DE||45 mi||44 min||SW 20 G 22||81°F||1007.7 hPa (-1.8)|
|LWSD1 - 8557380 - Lewes, DE||45 mi||44 min||WSW 8.9 G 13||85°F||69°F||1007.8 hPa (-1.4)|
|RDYD1 - 8551910 - Reedy Point, DE||48 mi||44 min||88°F||79°F||1005.4 hPa (-2.1)|
|SLIM2 - 8577330 - Solomons Island, MD||49 mi||44 min||SW 13 G 19||84°F||77°F|
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||56 min||SW 13 G 20||10.00 mi||Partly Cloudy||86°F||73°F||66%||1009.5 hPa|
|Bay Bridge Field, MD||21 mi||54 min||SSW 11 G 16||10.00 mi||Partly Cloudy||86°F||73°F||66%||1007.1 hPa|
Wind History from ESN (wind in knots)
|1 day ago||SW||S||SW|
|2 days ago||SW||SW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
Click for Map
Fri -- 01:47 AM EDT -0.09 feet Low Tide
Fri -- 05:20 AM EDT Moonrise
Fri -- 05:39 AM EDT Sunrise
Fri -- 08:13 AM EDT 2.93 feet High Tide
Fri -- 02:35 PM EDT 0.37 feet Low Tide
Fri -- 08:04 PM EDT Moonset
Fri -- 08:13 PM EDT 2.23 feet High Tide
Fri -- 08:32 PM EDT Sunset
Fri -- 10:32 PM EDT New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Baltimore Harbor Approach |
Click for Map
Fri -- 01:02 AM EDT 0.00 knots Slack
Fri -- 04:49 AM EDT 1.34 knots Max Flood
Fri -- 05:22 AM EDT Moonrise
Fri -- 05:40 AM EDT Sunrise
Fri -- 08:22 AM EDT -0.00 knots Slack
Fri -- 11:39 AM EDT -1.16 knots Max Ebb
Fri -- 03:21 PM EDT 0.00 knots Slack
Fri -- 05:42 PM EDT 0.54 knots Max Flood
Fri -- 08:06 PM EDT Moonset
Fri -- 08:10 PM EDT -0.00 knots Slack
Fri -- 08:34 PM EDT Sunset
Fri -- 10:32 PM EDT New Moon
Fri -- 11:11 PM EDT -0.75 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 (16,3,4,5)(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.