Monday, December11, 2017 L-36.com


Marine Weather and Tides
West Reading, PA

Version 3.4
What's New / NOTES
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 7:15AMSunset 4:39PM Monday December 11, 2017 5:30 PM EST (22:30 UTC) Moonrise 12:40AMMoonset 1:16PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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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ANZ530 Chesapeake Bay North Of Pooles Island- 332 Pm Est Mon Dec 11 2017
.small craft advisory in effect from Tuesday morning through Tuesday afternoon...
.gale warning in effect from Tuesday afternoon through late Tuesday night...
Rest of this afternoon..SW winds 5 kt. Waves less than 1 ft.
Tonight..SE winds 5 to 10 kt. Waves 1 ft. A chance of showers, snow showers and sleet. Vsby 1 to 3 nm.
Tue..S winds 10 to 15 kt with gusts to 20 kt... Becoming W 20 to 25 kt with gusts to 30 kt in the afternoon. Waves 2 to 3 ft. A chance of showers, snow showers and sleet. Vsby 1 to 3 nm.
Tue night..W winds 20 to 25 kt with gusts to 30 kt. Waves 2 to 3 ft.
Wed..W winds 20 to 25 kt with gusts to 30 kt. Waves 2 to 3 ft.
Wed night..W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of snow.
Thu..N winds 5 to 10 kt. Waves 1 ft or less. A chance of snow in the morning.
Fri..NW winds 5 to 10 kt. Waves 1 ft or less. A chance of rain or snow showers through the day.
ANZ500 332 Pm Est Mon Dec 11 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will move offshore tonight. An arctic cold front will pass through late Tuesday and high pressure will return for Wednesday. Weak low pressure will pass through the waters Thursday and another weak low will pass by to the east Friday. A gale warning may be needed for portions of the waters Wednesday. A small craft advisory may be needed for portions of the waters Wednesday night and Thursday.

7 Day Forecast for Marine Location Near West Reading , PA
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location: 40.34, -75.95     debug


Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 112103
afdphi
area forecast discussion
national weather service mount holly nj
403 pm est Mon dec 11 2017

Synopsis
High pressure over southeast canada moves east and offshore
tonight. Low pressure moving through the great lakes will pass
north of the area on Tuesday and drag a cold front through the
region by Tuesday evening. High pressure builds in from the west
on Wednesday, and then weak low passes through on Thursday. A
coastal low may affect the region on Friday, and then high
pressure returns for the weekend.

Near term until 6 am Tuesday morning
High pressure offshore will move to the east tonight while
strengthening low pressure moves towards the lower great lakes
region. These features will bring increasing clouds to the area
tonight along with a slowly increasing srly winds. Low
temperatures will range from the mid upper 20s across the north
to the low 30s over metro philadelphia and delmarva. Light snows
will likely affect the SRN poconos and NRN nj well after
midnight. We have increasing pops for these areas with small
(around 1 inch) accumulations for the higher elevations.

Short term 6 am Tuesday morning through 6 pm Tuesday
Low pressure will continue to strengthen while moving across ny
and into new england Tuesday. Light snows across the north will
continue through the morning and then diminish as a cold front
crosses the area. Further south, the chc for measurable precip
will be less, but some light snows are possible and areas
further south will have light rains. A limited confid fcst with
regards to QPF amts. After the cold front crosses the area,
winds will shift to W and increase to 15 to 25 mph with gusts
over 30 mph. Temperatures will be highest early in the day, then
fall through the afternoon, as the cold air advection
increases.

Long term Tuesday night through Monday
The long-term period continues to show a long-wave trof pattern
over the eastern us with several shortwave trofs rotating
through. The trof is deepest at the beginning period Tuesday
night with a roughly 505dam closed upper low forecast over ny
state. The associated surface low will deepen as it moves
northeast from new england into canada, maintaining strong nw
winds and CAA over the area through Wednesday. Some snow showers
are possible, mainly over the poconos.

For Thursday and Friday, temperatures should moderate slightly
but remain well below normal. A couple of fast-moving low
pressure centers could scoot past to our south and possibly
bring some light snow to the area.

The outlook for next weekend ATTM suggests temperatures
returning to near normal. Saturday looks mainly dry, but by
Sunday another low pressure may approach from the SW and bring a
a mix of rain and snow late Sunday into Monday. Confidence in
this system is rather low.

Aviation 21z Monday through Saturday
Tonight...VFR. Increasing clouds. W winds 5 to 10 knots early
will become light. After midnight, winds will increase from the
s SE reaching 10-15 knots by dawn. Few snow showers psbl N w
late.

Tuesday...VFR. Few snow rain showers N W during the morning withVFR
cigs expected. S winds 10-15 knots will become SW as a cold front
approaches. Winds will shift to W behind the front and gusts 25 to
30 knots probable by late afternoon.

Outlook...

Tuesday night through Wednesday... MainlyVFR conditions expected
but possible MVFR at times at rdg abe with snow showers. Gusty
west to northwest winds around 15 to 25 knots with gusts around
40 knots possible. Confidence: high
moderate
Thursday through Friday... MainlyVFR conditions expected. MVFR
or lower possible in snow showers. West to southwest winds
around 5 to 10 kts. Confidence: moderate
Saturday...VFR conditions expected. Southwest winds around 10 kt.

Confidence: low

Marine
Winds and seas will build late tonight and Tuesday ahead of a
deepening low pressure system and approaching front. A SCA flag
will be raised for the waters beginning at 11z Tuesday. Fair
weather tonight and sct rain snow showers across the NRN nj
waters Tuesday.

Outlook...

Tuesday night through Wednesday... Strong west winds with gale
force gusts likely. Seas will also remain elevated around 5 to 7
feet on the ocean. Seas will start to subside Wednesday night.

Thursday through Friday... Sub-sca conditions expected.

Saturday... Small craft advisory conditions possible. West winds
with gusts around 25 knots possible.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... Gale watch from Tuesday evening through Wednesday afternoon
for anz430-431-450>455.

Small craft advisory from 6 am to 6 pm est Tuesday for anz430-
431-450>455.

Synopsis... Mps
near term... O'hara
short term... O'hara
long term... Amc
aviation... Amc o'hara
marine... Amc o'hara


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MRCP1 - 8540433 - Marcus Hook, PA 46 mi43 min 1016 hPa
PHBP1 - 8545240 - Philadelphia, PA 51 mi43 min 40°F 44°F1015.9 hPa

Wind History for Philadelphia, PA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Reading, Reading Regional Airport, PA3 mi37 minN 010.00 miA Few Clouds37°F24°F59%1015.9 hPa
Pottstown, Pottstown Limerick Airport, PA22 mi37 minN 08.00 miPartly Cloudy33°F21°F64%1016.3 hPa
Lancaster, Lancaster Airport, PA24 mi38 minESE 310.00 miA Few Clouds38°F26°F62%1015.5 hPa

Wind History from RDG (wind in knots)
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Last 24hrW4SW3SW5SW7SW5SW7SW7W5CalmSE3SW3SW3SW5SW3CalmW5W10W7NW8W10W8CalmN3Calm
1 day agoNW4W3W4W7W8W3CalmCalmCalmCalmCalmW5W6W5CalmCalmW11
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2 days agoW3CalmCalmCalmCalmCalmCalmCalmCalmNW5CalmN3N6N4N3NE35CalmNW3N5NW4CalmN3NW3

Tide / Current Tables for Marcus Hook, Pennsylvania
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Marcus Hook
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Mon -- 12:38 AM EST     Moonrise
Mon -- 01:06 AM EST     -0.66 feet Low Tide
Mon -- 06:34 AM EST     5.33 feet High Tide
Mon -- 07:12 AM EST     Sunrise
Mon -- 01:13 PM EST     Moonset
Mon -- 01:27 PM EST     -0.44 feet Low Tide
Mon -- 04:37 PM EST     Sunset
Mon -- 07:00 PM EST     5.44 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0.6-0.11.42.94.25.25.34.63.72.71.70.6-0.3-0.212.53.955.45.14.33.32.2

Tide / Current Tables for Edgemoor, Delaware River, Delaware
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Edgemoor
Click for Map
Mon -- 12:38 AM EST     Moonrise
Mon -- 01:00 AM EST     -0.31 feet Low Tide
Mon -- 06:26 AM EST     5.17 feet High Tide
Mon -- 07:13 AM EST     Sunrise
Mon -- 01:13 PM EST     Moonset
Mon -- 01:20 PM EST     -0.04 feet Low Tide
Mon -- 04:37 PM EST     Sunset
Mon -- 06:49 PM EST     5.30 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-0.30.31.734.35.15.14.43.42.41.50.600.21.42.8455.34.83.92.91.9

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 (17,4,5,8)
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Ground Weather Radar Station Philadelphia, PA
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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.