Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Kent Narrows, MD

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:01AMSunset 7:22PM Thursday March 23, 2017 6:06 PM EDT (22:06 UTC) Moonrise 3:18AMMoonset 1:47PM Illumination 14% Phase: Waning Crescent; Moon at 26 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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ANZ539 Chester River To Queenstown Md- 431 Pm Edt Thu Mar 23 2017
.small craft advisory in effect from midnight edt tonight through Friday afternoon...
Rest of this afternoon..S winds 5 kt. Waves flat.
Tonight..S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft or less.
Fri..S winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft.
Fri night..S winds 5 to 10 kt. Waves 1 to 2 ft.
Sat..S winds 5 to 10 kt. Waves 1 ft.
Sat night..S winds 5 to 10 kt. Waves 1 ft.
Sun..SE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the afternoon. Showers likely through the night.
Mon..SE winds 5 to 10 kt. Waves 1 ft. Showers likely in the morning...then a chance of showers through the night.
ANZ500 431 Pm Edt Thu Mar 23 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure overhead this afternoon will slide offshore tonight, allowing a warm front to lift through the area on Friday. A low pressure system will then approach the area Sunday, and move through Sunday night into Monday. Small craft advisories may be needed for portions of the waters Friday night and again Sunday and Sunday night.

7 Day Forecast for Marine Location Near Kent Narrows, MD
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location: 38.97, -76.25     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 231929
afdphi
area forecast discussion
national weather service mount holly nj
329 pm edt Thu mar 23 2017

Synopsis
High pressure across the middle atlantic will move offshore by
Friday, while a warm front moves through the ohio valley. This
frontal boundary will become nearly stationary near our region
through Tuesday, as several waves of low pressure move along it. A
cold frontal passage is expected Wednesday, followed by canadian
high pressure building into our area on Thursday.

Near term /until 6 pm this evening/
It looks very likely now that any precip will hold off until after
sunrise tomorrow morning. All the same, we will be monitoring
temperature trends very carefully overnight as that could have
implications for precipitation type once it does begin Friday
morning. Until the clouds move in, we will have efficient
radiational cooling conditions with light winds and dry boundary
layer conditions. For now, I have gone mostly on the colder side of
guidance for temperatures, with lows ranging from the upper teens to
lower 30s.

Short term /6 pm this evening through Saturday/
As mentioned earlier, a big factor in how precipitation will begin
will be how quickly clouds move in tonight and how much radiational
cooling we have before then. Further complicating precip type is
that the air will likely remain quite dry at least through the
morning hours until moisture advection begins. Thus, could see some
wetbulb effects further lowering the temperature with and just
before the start of precipitation. All that to say, we have the
highest confidence that the southern poconos will see a wintry mix
of precipitation. For carbon and monroe counties, will issue a
winter weather advisory through the morning hours. Much less
confident (but still possible) for the next row of counties
including NW nj, lehigh valley, and berks co. DELMARVA and far
southern nj are unlikely to get any precip at all.

By early afternoon, expect all locations to be above freezing and
all precipitation to be rain.

Long term /Saturday night through Thursday/
An unsettled period of weather is in store this weekend thru the
middle of next week. At the mid-levels across the conus, a generally
zonal northern stream flow will be in place, while several shortwave
disturbances traverse the southern stream. Meanwhile at the surface,
canadian and sub-tropical high pressure systems will maintain a
frontal boundary in the vicinity of our region until a more
substantial frontal passage on Wednesday.

The primary uncertainty will be the location of the aforementioned
boundary, along with the timing of several areas of low pressure
that ride along it, and accompanying areas of precipitation. Of most
concern is the potential of mixed precipitation Sunday night.

On Saturday, the NAM and ec are most extensive with the overrunning
precipitation associated with the stationary boundary to our north.

The GFS looks more reasonable with the placement of the precip in
relation to the frontal boundary, confining pops to the northern
half of our cwa, and our forecast reflects this.

As the frontal boundary moves southward in response to canadian high
pressure building to the north, scattered showers are possible
across our entire area Saturday night into Sunday. As low pressure
moves through the ohio valley into the great lakes from Sunday night
into Monday, more substantial overrunning precip is likely during
this time frame.

As mentioned previously, there is some potential for mixed
precipitation Sunday night into Monday morning. A review of plan
view 2-meter and 850 hpa temperatures, 1000 to 500 hpa and 1000 to
850 hpa thicknesses, model p-type, ens plume diagrams, model
soundings, and cips analogs points to freezing rain as the primary
concern. There is a high amount of uncertainty, especially at this
range in the forecast, which translates into low confidence. The
probability for freezing rain is low at this time, therefore it was
not mentioned in the hwo (per our directives), but this will need to
reassessed with future forecast packages. Also, please note that ice
map on our website is for Friday, march 23.

Expect showers to continue Monday night into Wednesday, and another
round of more substantial precip likely centered on Tuesday night
into Wednesday, associated with a cold frontal passage. There is
uncertainty with the timing of this front, particularly given the
time range, but a gradual return to fair weather should occur on
Wednesday and continue into Thursday.

Temperature-wise, at or above normal through the period.

Aviation /20z Thursday through Tuesday/
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Vfr conditions will continue through at least 12z. After 12z, there
is an increasing risk for precipitation (expected to be all rain at
the TAF sites, but freezing precipitation will be possible N and w
of kabe and krdg). With any rain, brief MVFR conditions will be
possible. The rain should move out by mid afternoon bringing a
return toVFR conditions.

Light and variable winds may continue through much of the overnight
hours before settling in out of the south by 12z Friday.

Outlook...

Saturday and Sunday... A period of MVFR is possible in low
clouds, especially northwest of an acy-miv line. Otherwise,VFR.

Southwest winds 10 to 15 knots on Saturday will shift to the
east Saturday night into Sunday, increasing to 10-20 knots.

Sunday night thru Tuesday... Periods of MVFR possible in low clouds
and fog. South-southwest winds Sunday night into Monday may shift to
the east-southeast Monday night and Tuesday, generally at or below
20 knots.

Marine
Winds and seas should stay below SCA criteria tonight into tomorrow
morning. By mid day tomorrow, winds will increase. Gusts above 25 kt
will be possible especially for the new jersey coastal waters
through the afternoon hours.

Outlook...

if confidence increases for elevated winds and seas to linger
into Saturday night, the small craft advisory (sca) may need to
be extended further into this time frame.

As a front moves south across the waters on Sunday, winds and seas
may increase to SCA levels during the day, mainly across the
northern nj waters.

Looking ahead to Monday and Tuesday, wave heights may build in
excess of five feet during this period. Therefore, a SCA may be
needed.

Phi watches/warnings/advisories
Pa... Winter weather advisory from 8 am to 1 pm edt Friday for
paz054-055.

Nj... None.

De... None.

Md... None.

Marine... Small craft advisory from 10 am to 8 pm edt Friday for
anz450>453.

Synopsis... Franck
near term... Johnson
short term... Johnson
long term... Franck
aviation... Franck/johnson
marine... Franck/johnson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CPVM2 8 mi49 min 41°F 12°F
TPLM2 - Thomas Point, MD 11 mi67 min SE 6 G 7 39°F 44°F10°F
APAM2 - 8575512 - Annapolis, MD 12 mi49 min 41°F 1034 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 17 mi49 min S 6 G 9.9 42°F 43°F1034.5 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 23 mi49 min SE 13 G 15 39°F 1034.1 hPa
FSNM2 23 mi49 min SSE 12 G 14 39°F 1033.4 hPa
BLTM2 - 8574680 - Baltimore, MD 27 mi49 min S 14 G 16 40°F 44°F
BSLM2 - Chesapeake Bay, MD 28 mi157 min SE 4.1 50°F 1035 hPa9°F
CA2 - 8571892 - Cambridge, MD 29 mi49 min N 2.9 G 2.9 41°F 44°F1034.2 hPa
44062 - Gooses Reef, MD 30 mi37 min SSW 12 G 12 40°F 1035.4 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 40 mi49 min S 8.9 G 9.9 38°F 1035.5 hPa
WASD2 - 8594900 - Washington, DC 41 mi49 min S 5.1 G 6 46°F 47°F1033.7 hPa
DRSD1 - Delaware Reserve, DE 44 mi112 min W 5.1 44°F 1035 hPa8°F
CHCM2 - 8573927 - Chesapeake City, MD 45 mi49 min SW 1.9 G 7 43°F 45°F1033.7 hPa
SLIM2 - 8577330 - Solomons Island, MD 46 mi49 min SE 8.9 G 9.9 40°F 45°F

Wind History for Tolchester Beach, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay Bridge Field, MD4 mi92 minSE 67.00 miFair45°F10°F25%1035.2 hPa
Annapolis, United States Naval Academy, MD12 mi73 minSE 1010.00 miFair41°F19°F43%1034.9 hPa
Easton / Newman Field, MD15 mi77 minN 010.00 miClear45°F-2°F14%1036.2 hPa

Wind History from W29 (wind in knots)
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Last 24hrN12
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N7N7NE5N5N8N9N7N3--------N5N6NW6NW6NE3CalmS7SE5SE5
1 day agoS4W3CalmCalmCalmS4W5W4W3CalmN5NW13
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2 days agoCalmCalmCalmCalmCalmCalmCalmCalmE3CalmE3E5E4CalmCalmN3NW4N6NW4N3NW4NW3S7S6

Tide / Current Tables for Kent Island Narrows, Maryland
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Kent Island Narrows
Click for Map
Thu -- 01:45 AM EDT     1.04 feet High Tide
Thu -- 04:17 AM EDT     Moonrise
Thu -- 07:03 AM EDT     Sunrise
Thu -- 08:12 AM EDT     0.15 feet Low Tide
Thu -- 02:24 PM EDT     1.29 feet High Tide
Thu -- 02:46 PM EDT     Moonset
Thu -- 07:20 PM EDT     Sunset
Thu -- 09:32 PM EDT     0.31 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.81110.80.60.40.20.20.20.40.60.91.21.31.31.210.80.60.40.30.30.5

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
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Baltimore Harbor Approach
Click for Map
Thu -- 12:07 AM EDT     0.00 knots Slack
Thu -- 02:46 AM EDT     0.48 knots Max Flood
Thu -- 04:17 AM EDT     Moonrise
Thu -- 05:33 AM EDT     -0.00 knots Slack
Thu -- 07:03 AM EDT     Sunrise
Thu -- 08:29 AM EDT     -0.53 knots Max Ebb
Thu -- 11:12 AM EDT     0.00 knots Slack
Thu -- 02:45 PM EDT     0.84 knots Max Flood
Thu -- 02:46 PM EDT     Moonset
Thu -- 06:05 PM EDT     -0.00 knots Slack
Thu -- 07:20 PM EDT     Sunset
Thu -- 09:22 PM EDT     -0.83 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-00.20.40.50.40.1-0.1-0.4-0.5-0.5-0.3-0.10.30.60.80.80.70.40-0.4-0.7-0.8-0.8-0.6

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Philadelphia/Mount Holly, PA (18,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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weather_mapweather_map weather_map

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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.