Tuesday, June19, 2018 L-36.com

Marine Weather and Tides
Trexler, PA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:29AMSunset 8:37PM Tuesday June 19, 2018 1:46 PM EDT (17:46 UTC) Moonrise 11:08AMMoonset 12:00AM Illumination 38% Phase: Waxing Crescent; Moon at 6 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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ANZ338 NEw York Harbor- 1228 Pm Edt Tue Jun 19 2018
This afternoon..N winds around 10 kt with gusts up to 20 kt. Waves 1 ft or less.
Tonight..N winds around 5 kt. Waves 1 ft or less.
Wed..E winds around 5 kt, becoming se in the afternoon. Waves 1 ft or less.
Wed night..S winds 5 to 10 kt, becoming E after midnight. Waves 1 ft or less. Chance of showers.
Thu..NE winds 5 to 10 kt, becoming E in the afternoon. Waves 1 ft or less. Chance of showers in the morning.
Thu night..E winds 5 to 10 kt. Waves 1 ft or less.
Fri..SE winds 5 to 10 kt. Waves 1 ft or less.
Fri night..SE winds 5 to 10 kt. Waves 1 ft or less.
Sat..SE winds around 10 kt. Waves 1 ft or less. Chance of rain in the afternoon.
Sat night..S winds 5 to 10 kt. Waves 1 ft or less. Chance of showers.
ANZ300 1228 Pm Edt Tue Jun 19 2018
Synopsis for the long island waters and new york harbor.. Weak high pressure builds in through tonight, followed by a cold front crossing the area Wednesday and Wednesday night as an area of low pressure passes to our south. High pressure then builds to the northeast through Thursday night, then gradually retreats to the northeast on Friday. A warm front passes on Saturday.

7 Day Forecast for Marine Location Near Trexler, PA
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location: 40.6, -75.64     debug

Area Discussion for - Philadelphia/Mount Holly, PA
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Fxus61 kphi 191441
area forecast discussion
national weather service mount holly nj
1041 am edt Tue jun 19 2018

A cold front settles south of our area by later today and stalls,
then weak high pressure slides to our north through tonight. A weak
area of low pressure tracks along the front and crosses our region
Wednesday night into early Thursday. High pressure builds in
Thursday night, then shifts offshore Friday. A warm front lifts
across the region later Saturday, followed by a cold front during
Sunday. High pressure should then start to build in during Monday.

Near term until 6 pm this evening
The cold front has made it into our area as evident of the
decreasing dewpoints advecting into the area. Dewpoints in the
upper 50s to lower 60s moving in and will continue spread
southward as the front advances across the area. The shower
activity ahead of the front has weakened through the
morning hours. However, as daytime heating continues through the
afternoon, instability will develop south of the front into this
afternoon across extreme southern new jersey, central southern
delaware, and eastern shore of maryland. This will allow for a
few isolated scattered showers and thunderstorms to develop
through the afternoon hours as a short wave approaches from the
west. Any showers thunderstorms that do develop will be capable
of producing brief heavy downpours and locally gusty winds.

Short term 6 pm this evening through 6 am Wednesday
High pressure builds in from the great lakes-upstate ny area
tonight. North-northeast winds around the surface high will sustain
the transport of cooler and drier air into the region.

Low temperatures range from the mid 50s in northeast pa and
northwest nj to the mid and upper 60s in the i-95 urban areas and in
the coastal plain. High clouds (convective debris from midwest
convection) may spread into the area late tonight.

Long term Wednesday through Monday
Summary... Unsettled late Wednesday into early Thursday; turning more
humid and potentially unsettled over the weekend; some cooling early
next week.

Synoptic overview... An upper-level trough is forecast to amplify
across southeastern canada and the northeast later Wednesday and
Thursday. This trough lifts out for the end of the week with some
ridging arriving ahead of an upper-level trough. This trough looks
to arrive over the weekend as it may eventually merge into one main
upper-level trough once again over southeastern canada and the
northeast. This may then tend to keep our region within cyclonic
flow through early next week. Overall, the pattern looks progressive
with no sustained high heat and humidity.

For Wednesday and Thursday... As an upper-level trough amplifies
across the northeast from southeastern canada, some short wave
energy results in weak low pressure developing along a stalled west
to east frontal zone which is to our south. These features track
eastward and move across our region late Wednesday before shifting
out to sea Thursday morning. Most of the shower activity looks to
occur Wednesday night into early Thursday morning, coinciding with
an area of ascent and convergence that moves across the forecast
area. A plume of precipitable water values to around 2 inches is
forecast to advect northward across about the southern half of our
area Wednesday night. This may result in locally heavy rain,
especially where stronger convective elements occur. There is mostly
elevated instability forecast to be present, therefore will maintain
a thunder mention for a time. The pops were raised to likely for
a good portion of our area Wednesday night.

As the weak surface low shifts out to sea during Thursday, high
pressure from near and north of the great lakes builds eastward.

This allows for drier air to advect across our area, however a north
to northeast low-level flow may delay the clearing longer especially
for the southern areas. The presence of a nearby upper-level jet may
also keep some mid to high level clouds around for awhile. The upper-
level trough is forecast to lift out Thursday night.

For Friday... As the upper-level trough lifts farther away from our
region, a short wave ridge builds east on Friday. This allows
surface high pressure to build across new england and also down into
the northern mid-atlantic region. A frontal zone will be positioned
well to our south and an onshore flow looks to result. This will
likely keep the coastal areas cooler. As the next upper-level
trough, which may be a closed low, moves into the ohio and tennessee
valley's, warm air advection is forecast to increase toward our
region late in the day and especially at night. This will help to
strengthen the frontal zone as a warm front. This warm front should
be approaching our far southern areas late Friday night. The best
lift, forcing and instability looks to be west and southwest of our
area, therefore only carried some slight chance pops across the
western and southern areas at night.

For Saturday and Sunday... As an upper-level trough or closed low
lifts across the eastern great lakes Saturday, it should weaken and
become absorbed into a larger upper-level trough that starts
amplifying across southeastern canada. This drives surface low
pressure across the eastern great lakes later Saturday, pulling a
warm front northward across our region. Some showers and
thunderstorms may accompany the warm frontal passage during the day
Saturday followed by a possible pre-frontal trough Saturday night. A
cold front is currently forecast to move through our area during
Sunday. The main upper-level trough amplifying into the northeast
Sunday may hold back the stronger forcing behind the actual cold
front. Therefore, the coverage and intensity of the convection is
less certain as the more organized convection may focus across
delmarva southward. The incoming trough looks decent, therefore will
have to monitor for the potential for a more robust convective setup.

For Monday... The amount of clearing and drying that takes place will
depend on the timing and sharpness of an upper-level trough in the
northeast as it shifts eastward. A cold front is forecast to be
settled to our south, and as of now it is far enough south to
probably result in a dry day. It is possible the boundary hangs up a
bit farther north as a wave of low pressure develops on it, however
this is less certain. We opted to carry a slight chance pop for now
in the gridded forecast.

Aviation 15z Tuesday through Saturday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Today... PredominatelyVFR. A brief period of MVFR CIGS has
developed as a cold front continues to sag through the area and
will affect southeastern pennsylvania, southern new jersey,
delaware and maryland through the late morning into the
afternoon. The lower CIGS should only last an hour or two at
each location. Showers have dissipated, and any showers this
afternoon are expected to develop south of the TAF sites.

Winds have shifted to the northwest this morning and will remain
out of the northwest through this afternoon. Wind speeds are
generally around 8-10 knots, with some gusts in the 15-20 knot
range. Winds will veer out of the N late this afternoon.

However, a sea- breeze will lead to a much more abrupt wind
shift out of the e-ne this afternoon at acy and possibly at miv
toward the early evening.

Tonight...VFR. N-ne winds under 10 kt.


Wednesday and Thursday...VFR during the day with increasing clouds,
then MVFR ifr conditions should develop at night as some showers and
possible thunderstorms move through. The conditions should improve
toVFR during Thursday morning.

Friday...VFR overall.

Saturday... Developing MVFR conditions are probable as a warm front
lifts across the area with a chance of showers and thunderstorms.

Southerly winds may gust up to 20 knots during the day.

Winds and seas below SCA criteria today. W-sw winds 5-10 kt with
gusts to 15 kt early this morning will become NW by late this
morning and then NE this afternoon. Seas in our coastal waters of 3-
4 ft early this morning should gradually diminish to around 2 ft
this afternoon.


Wednesday... The conditions are expected to be below small craft
advisory criteria. Some increase in the winds may occur for a time
especially in the afternoon and evening however gusts should be
at or below 20 knots.

Thursday and Friday... The conditions are anticipated to be below
small craft advisory criteria.

Saturday... A warm front is forecast to lift north of the area late.

Southeast to south winds may gust to around 20 knots at times. There
is a chance of showers and thunderstorms.

Rip currents...

a low risk for the development of dangerous rip currents is expected
at the nj and de beaches today with waves in the surf zone of 2-3
ft and a light medium-period (6-9 sec) south to southeasterly swell.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... None.

Synopsis... Gorse
near term... Klein robertson
short term... Klein
long term... Gorse
aviation... Gorse klein robertson
marine... Gorse klein

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PHBP1 - 8545240 - Philadelphia, PA 53 mi47 min 86°F 73°F1009.2 hPa (+0.0)
BDRN4 - 8539094 - Burlington, Delaware River, NJ 54 mi71 min NW 5.1 G 9.9 82°F 75°F1009.2 hPa

Wind History for Philadelphia, PA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Allentown Queen City Municipal Airport, PA8 mi72 minN 8 G 1510.00 miFair82°F57°F42%1011.5 hPa
Allentown, Lehigh Valley International Airport, PA12 mi56 minNNW 7 G 1610.00 miFair85°F57°F40%1010.5 hPa
Quakertown Airport, PA18 mi52 minWNW 710.00 miFair82°F62°F51%1010.8 hPa
Reading, Reading Regional Airport, PA23 mi53 minNNE 810.00 miA Few Clouds83°F64°F55%1011 hPa

Wind History from XLL (wind in knots)
Last 24hr------------------------------------------N9
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Market Street Bridge, Schuylkill River, Pennsylvania
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Market Street Bridge
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Tue -- 12:41 AM EDT     Moonset
Tue -- 01:18 AM EDT     0.42 feet Low Tide
Tue -- 05:31 AM EDT     Sunrise
Tue -- 06:35 AM EDT     6.95 feet High Tide
Tue -- 12:06 PM EDT     Moonrise
Tue -- 01:58 PM EDT     0.04 feet Low Tide
Tue -- 07:16 PM EDT     6.46 feet High Tide
Tue -- 08:32 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Philadelphia, Pennsylvania
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Tue -- 12:41 AM EDT     Moonset
Tue -- 01:44 AM EDT     0.47 feet Low Tide
Tue -- 05:31 AM EDT     Sunrise
Tue -- 07:02 AM EDT     6.94 feet High Tide
Tue -- 12:06 PM EDT     Moonrise
Tue -- 02:21 PM EDT     0.03 feet Low Tide
Tue -- 07:47 PM EDT     6.36 feet High Tide
Tue -- 08:32 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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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 (13,3,4,5)
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Ground Weather Radar Station Philadelphia, PA
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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.