Monday, June26, 2017 L-36.com


Marine Weather and Tides
Tamaqua, 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 5:32AMSunset 8:41PM Monday June 26, 2017 6:17 PM EDT (22:17 UTC) Moonrise 7:28AMMoonset 9:53PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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
    EDIT      (on/off)   Help
ANZ530 Chesapeake Bay North Of Pooles Island- 432 Pm Edt Mon Jun 26 2017
Rest of this afternoon..SW winds 10 kt. Waves 1 ft.
Tonight..NW winds 5 to 10 kt. Waves 1 ft.
Tue..W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Tue night..NW winds 5 to 10 kt. Waves 1 ft or less.
Wed..W winds 5 kt. Waves flat.
Wed night..S winds 5 to 10 kt. Waves 1 ft.
Thu..SW winds 10 to 15 kt. Waves 1 to 2 ft.
Fri..SW winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 432 Pm Edt Mon Jun 26 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build west of the area through Tuesday. A weak cold front will cross the waters Tuesday. High pressure will move over the area Wednesday before shifting offshore Thursday. Small craft advisory conditions are possible over portions of the waters Tuesday and again Thursday.

7 Day Forecast for Marine Location Near Tamaqua , PA
   Hourly   EDIT   Help
location: 40.8, -75.94     debug


Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kphi 261937
afdphi
area forecast discussion
national weather service mount holly nj
337 pm edt Mon jun 26 2017

Synopsis
High pressure will build eastward into the region tonight and
throughout the day Tuesday. This high pressure system will become
anchored offshore through the middle and later parts of this week. A
cold frontal boundary is expected to approach from the northwest
this weekend into early next week.

Near term until 6 am Tuesday morning
So far, precipitation has failed to develop in the area, and with
stronger large-scale ascent to the west in closer proximity to an
approaching shortwave trough currently in the great lakes region,
decided to pull pops for the rest of the afternoon and evening. I'm
not sure a spotty shower can be completely ruled out, but satellite
trends indicate a rather benign-looking cumulus field at the moment,
with more pronounced vertical ascent well to the northwest of the
area. A weak perturbation moves through the region around sunset,
but lift in association with it seems rather muted at the moment.

Tonight, the aforementioned shortwave trough marches east, reaching
western new york by 12z Tuesday. The 12z GFS rgem and (to varying
degrees) some of the higher-resolution guidance indicate a weak
predecessor vort MAX moving southwest to northeast through the area
during the overnight hours. Spotty showers may develop in proximity
to this perturbation, moving rapidly northeastward just downstream
of it. The 12z nam, however, looks quite dry, and the very weak lift
along with some run-to-run continuity issues with the hrrr precluded
me from including pops at this point. However, this will be
something to watch during the overnight hours. I did increase cloud
cover in close proximity to the track of this perturbation as a
start, though this may be somewhat overdone.

Overnight temperatures look to be rather cool as the shortwave
trough lowers heights thicknesses across the region. Forecast lows
are around 50 in the southern poconos, in the middle to upper 50s in
more rural locations elsewhere, and in the lower 60s on the coast
and in the urban corridor.

Short term 6 am Tuesday morning through 6 pm Tuesday
The vort MAX in western new york at 12z Tuesday pivots northeastward
during the day, with a northeast-to-southwest oriented lobe of
higher vorticity approaching the mid-atlantic region during the
afternoon. There will be an attendant surface trough moving through
the area during the day. Weak convergence along the associated
boundary during peak heating may initiate a spotty shower or storm
during the day, but guidance looks fairly tame in producing much
precipitation across the area. Nevertheless, the addition of large-
scale ascent in advance of the trough and the rather cold midlevels
suggest that instability may be sufficient to initiate a few storms.

As such, I felt that guidance was a little too tame with
precipitation prospects tomorrow, especially north of the mason-
dixon line (in closer proximity to stronger large-scale ascent).

Kept pops on the higher side of consensus (which still keeps it at
slight chance or chance). The 12z NAM looks too dry, whereas the 12z
rgem seems a more reasonable outcome with the stronger large-scale
lift in play. Used a blend of 12z GFS rgem WRF guidance as a
starting point tomorrow for wx pops, but confidence is pretty low
given that the strongest dynamics are well to the north of the area.

One limiting factor appears to be the somewhat limited vertical
extent of conditional instability parcel buoyancy (upper levels cool
rather slowly, and the boundary layer is relatively dry), which will
prevent CAPE from becoming too substantial across the region
(generally well below 500 j kg across the region).

Forecast temps are a blend of mav met and continuity, with highs
expected to be a little cooler than today owing to increased cloud
cover and the closer proximity of the passing vort max.

Long term Tuesday night through Monday
Highlights:
1. Heat index values near 100 possible for the urban corridor
Friday and Saturday.

2. Highest chance of thunderstorms right now centered on later
Saturday into Sunday with more uncertainty regarding any strong to
severe storms.

Tuesday night through Thursday night:
high pressure will be moving across eastward across our region
in this timeframe. This will begin a warming trend across the
region as winds become southwesterly on the backside of the
high. Humidity will slowly start to increase as well after one
last refreshing day Wednesday. Wednesday looking at bufkit
soundings look to be fairly favorable for mixing which may
lower rh values more than what model guidance has at this point.

Soundings also show an increasing potential for wind gusts near
20 mph on Thursday.

Friday through Saturday:
this period largely diverts from blended model and ensemble
guidance outside of the ECMWF suite. It appears the GFS is
overdeveloping convection given the overall set-up below and
normal biases for pattern progression that can be to quick.

Mid-level ridging will continue along the east coast in this
timeframe. As a result, an approaching cold front will be kept to
the northwest. With development of a cap marked by several hundred
j kg of CIN and 700 mb temps modeled near 9c it will be hard to
develop any thunderstorms across the region with the front still
well to our northwest. The higher terrain northwest of the i-95
fall line may be able to overcome this enough for an isolated
thunderstorm or two to fire with peak heating.

The main story will be the increasing heat and humidity. Looking at
the modeled temperatures at 850 and 925, low to mid 90's are
entirely possible across the urban corridor both days with
slightly cooler temperatures elsewhere. A continued increase in
humidity will keep lows from falling much below the low and mid
70's at night in spots. Heat index values near 100 are
possible as well. Be prepared to drink plenty of water, wear
light weight and loose clothing along with having a plan to
spend time in air-conditioning this weekend to beat the heat.

Due to some uncertainties with thunderstorm coverage, frontal
timing and the region more accustomed to heat will leave this
out of the hwo for now. Wind gusts from the southwest near 20
mph are currently expected for both afternoons as well.

Saturday night through Monday:
the cold front mentioned in the Friday-Saturday timeframe will
continue to push southeast into the region eroding any cap along
with acting as a trigger for higher coverage of showers and
thunderstorms Saturday night and Sunday. Heavy downpours will be
possible with thunderstorms due to the very moist airmass
expected to be in place. While instability looks sufficient for
thunderstorms, the amount of shear currently modeled is limited
for any widespread strong to severe storms at this time. The
front is likely to dissipate by Monday leading to a typical
summertime set-up with isolated pop-up thunderstorms.

Aviation 19z Monday through Saturday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Vfr through the period. Sct-bkn cumulus deck around 6000-8000 feet
this afternoon, with winds west or southwest 5 to 15 kts with
occasional gusts to 20 kts. Tonight, skies may briefly clear for a
time after sunset and then begin to increase late evening onward,
especially northwest of kphl. Winds mostly light and variable.VFR
cigs likely tomorrow with isolated to widely scattered storms
possible. Coverage looks too sparse and confidence in occurrence is
not high enough for TAF inclusion at this time. Winds should pick up
tomorrow afternoon, with gusts to 20 kts possible.

Outlook...

Tuesday night through Thursday:VFR. West wind 10 knots or less
through Wednesday shifting to southeast from 10-15 knots on
Thursday with gusts around 20 knots in the afternoon.

Thursday night through Saturday: mainlyVFR. Southerly winds 10-15
knots on average. Any isolated thunderstorm may briefly lower
celings and visibilities later Friday and Saturday during the
late afternoon and evening. Gusts around 20 knots in the
afternoons.

Marine
Sub-advisory conditions are expected through the period. Winds will
primarily be in the southwest quadrant, with speeds generally 5 to
15 kts with occasional gusts to 20 kts or so. There is a slight
chance of storms tomorrow, especially in the delaware coastal
waters, as a low develops offshore and a weak surface trough moves
through the region during the day. Coverage of any precipitation
should be sparse at best.

Outlook...

seas are likely to increase to around or just over five feet with
southerly flow sometime on Thursday. These may continue into
Saturday. Otherwise, seas under five feet. Some wind gusts
around 25 knots are currently likely from the southerly flow
late Thursday through Saturday.

Rip currents
The forecast conditions through this evening should result in a
low risk for the development of dangerous rip currents.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... None.

Synopsis... Gaines
near term... Cms
short term... Cms
long term... Gaines
aviation... Cms gaines
marine... Cms gaines


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PHBP1 - 8545240 - Philadelphia, PA 73 mi47 min 84°F 78°F1015.3 hPa
MRCP1 - 8540433 - Marcus Hook, PA 74 mi47 min 79°F 1015.7 hPa

Wind History for Philadelphia, PA
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Allentown, Lehigh Valley International Airport, PA29 mi26 minWSW 14 G 1810.00 miA Few Clouds78°F48°F35%1015.2 hPa

Wind History from ABE (wind in knots)
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
Last 24hrW7W8W5W4W3W3NW3W3CalmSW4--------------------SW7SW9SW10SW14
G18
1 day agoW11SW10W7W5W3N5CalmCalmCalmCalmCalmCalmCalmCalmSW4S3S5SW8W5SW9
G17
W8--W8W12
2 days agoSW4S5NW7NW4W3SW6SW6SW4SW4W4SW4W4W5W7W9NW14
G19
NW11
G16
NW12
G18
W12
G16
W13
G18
W12
G18
W11W11
G17
W12

Tide / Current Tables for Market Street Bridge, Schuylkill River, Pennsylvania
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Market Street Bridge
Click for Map
Mon -- 03:25 AM EDT     7.49 feet High Tide
Mon -- 05:33 AM EDT     Sunrise
Mon -- 08:27 AM EDT     Moonrise
Mon -- 10:59 AM EDT     0.03 feet Low Tide
Mon -- 04:02 PM EDT     6.37 feet High Tide
Mon -- 08:33 PM EDT     Sunset
Mon -- 10:47 PM EDT     Moonset
Mon -- 11:06 PM EDT     0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
356.57.47.36.55.64.63.52.20.7012.94.55.76.465.14.23.22.110.3

Tide / Current Tables for Tacony-Palmyra Bridge, New Jersey
   EDIT      (on/off)   Help   One Week of Data
Tacony-Palmyra Bridge
Click for Map
Mon -- 04:15 AM EDT     8.07 feet High Tide
Mon -- 05:33 AM EDT     Sunrise
Mon -- 08:26 AM EDT     Moonrise
Mon -- 11:31 AM EDT     0.05 feet Low Tide
Mon -- 04:50 PM EDT     7.02 feet High Tide
Mon -- 08:33 PM EDT     Sunset
Mon -- 10:47 PM EDT     Moonset
Mon -- 11:37 PM EDT     0.43 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.73.75.4787.76.75.74.53.21.70.30.31.63.34.96.576.35.34.231.80.7

Weather Map and Satellite Images
       (on/off)   Help
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)
      (on/off)   Help

Ground Weather Radar Station Philadelphia, PA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.