Marine Weather and Tides
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 6:57AM||Sunset 4:45PM||Monday November 20, 2017 12:51 AM EST (05:51 UTC)||Moonrise 8:40AM||Moonset 6:38PM||Illumination 2%|
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|ANZ530 Chesapeake Bay North Of Pooles Island- 1231 Am Est Mon Nov 20 2017 |
.small craft advisory in effect through this afternoon...
Overnight..W winds 15 kt with gusts to 25 kt. Waves 1 to 2 ft... Except flat near the mouth of the susquehanna.
Mon..W winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
Mon night..S winds 5 to 10 kt. Waves 1 ft.
Tue..S winds 5 to 10 kt. Waves 1 ft.
Tue night..SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Wed..NW winds 10 to 15 kt. Waves 1 ft.
Wed night..N winds 5 to 10 kt. Waves 1 ft.
Thu..W winds 5 kt. Waves less than 1 ft.
Fri..SW winds 5 to 10 kt. Waves 1 ft.
|ANZ500 1231 Am Est Mon Nov 20 2017 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build to our south through Monday. The high will move offshore Tuesday and a cold front will pass through late Tuesday night into Wednesday. High pressure will return for the second half of the week. A small craft advisory may be needed for portions of the waters Tuesday through Wednesday night.
7 Day Forecast for Marine Location Near Ranshaw, PAHourly EDIT Help
Area Discussion for - State College, PA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kctp 200421|
area forecast discussion
national weather service state college pa
1121 pm est Sun nov 19 2017
Cold and windy conditions are expected overnight with lake
effect snow showers continuing over the northwest alleghenies
and laurel highlands. Thanksgiving week looks mainly dry with
temperatures trending milder to above average into Tuesday
before cooling off to near seasonal levels for the rest of the
Near term until 6 am Monday morning
Latest radar shows a fairly well organized band of snow showers
from about franklin SE to philipsburg and approaching state
college. Other bands or small areas of scattered snow showers
are racing through all but my far sern zones. A brief heavier
snow shower could whiten the ground and cause locally slick
roads, but the best chance of additional accums remains over my
nw and laurel highland counties.
The snow showers will continue with the trend toward slowly
diminishing in coverage as inversion heights slowly lower in
response to high pressure building in from the sw.
Stayed close to hires ensemble mean for total snow
accumulations of 2-4" with localized 4-6" in the perennial lake
effect belt north of route 6. Elsewhere expect an inch or less with
perhaps a bit more (up to 2") on the ridges and summits over
the laurel highlands. Minimum wind chills will drop into the
teens and 20s into Monday morning.
Short term 6 am Monday morning through Monday night
High pressure passing to the south of pa should shift back the
lake effect snow trajectory to more of a wsw-ene orientation
and focus snow showers into southwest ny by Monday afternoon.
Cloud cover to the east of the alleghenies should decrease with
mostly cloudy skies trending to partly mostly sunny by late in
the day. MAX temps still chilly and few degrees below average
for mid late november. Min temps may occur early over the
western higher elevations as southwest winds increase into tue
Long term Tuesday through Sunday
The extended part of the forecast will see the season's first
real lake effect snow event winding down early in the period,
followed by several days of cool but tranquil weather.
High pressure will keep conditions dry into Tuesday before a
weakening front sliding by to our north brings the small chance
of a snow shower to northern areas Tuesday night and Wednesday.
Another area of high pressure will build east and keep us mainly
dry at least through the end of the week, before a new frontal
system takes aim at the area.
Aviation 04z Monday through Friday
Variable MVFR ifr expected at kbfd and kjst for the rest of the
overnight hours from frequent lake effect orographically
enhanced snow showers.
Downsloping and drying will help to erode most the the MVFR
strato CU deck INVOF kaoo kipt and keep those 2 locations
However, last few runs of the hrrr have displayed consistency
with the forecast of a single, slow-moving band of mdt to
briefly heavy snow showers from near kduj and kfig ese to kunv
for the next several hours. Low-level winds will back a bit
more to a westerly direction across western pa, and help to
enhance focus boundary layer convergence along and just to the
east of the current band of snow showers. Brief reductions to
ifr lifr appear possible through about 06-07z at kunv and vcnty
as a result of this snow shower band.
Flurries and isolated to scattered -shsn expected elsewhere
across the central ridge and valley region of the state,
with predominantlyVFR conditions.
Winds gusts will gradually decrease late tonight and shift
direction to more westerly between 06-12z Monday across western
pa TAF sites.
Bkn MVFR deck will prevail at kbfd and kjst with sct-bknVFR
cigs at kaoo, kunv, kipt, kmdt and klns through the mid
afternoon hours Monday. Skies will gradually clear out from
south to north, with the sfc winds backing to the west
southwest and decreasing to 6-9 kts after 20z Monday
mon... Am shsn reduced vsbys possible NW mountains.
Tue-wed... Chance of rain snow showers Tue night-am wed.
Thu-fri... No sig wx expected.
Ctp watches warnings advisories
Winter weather advisory until 1 pm est Monday for paz004-005.
Synopsis... La corte
near term... La corte
short term... Steinbugl
long term... La corte ceru
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|
|MRCP1 - 8540433 - Marcus Hook, PA||88 mi||52 min||41°F||53°F||1012.1 hPa (+2.0)|
|PHBP1 - 8545240 - Philadelphia, PA||92 mi||52 min||40°F||50°F||1011.6 hPa (+2.1)|
Wind History for Philadelphia, PA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Selinsgrove Penn Valley Airport, PA||19 mi||59 min||W 9||10.00 mi||A Few Clouds||36°F||25°F||64%||1012.4 hPa|
|Muir Army Air Field / Indiantown, PA||23 mi||56 min||W 12 G 25||10.00 mi||Partly Cloudy||37°F||26°F||65%||1012.8 hPa|
Wind History from SEG (wind in knots)
|1 day ago||Calm||Calm||Calm||N||Calm||Calm||Calm||Calm||SW||SW||SW||SW||SW||S||SW||W||W||N||Calm||Calm||E||E|
|2 days ago||NW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Port Deposit |
Click for Map
Mon -- 06:54 AM EST Sunrise
Mon -- 07:29 AM EST 0.59 feet Low Tide
Mon -- 08:35 AM EST Moonrise
Mon -- 11:24 AM EST 1.82 feet High Tide
Mon -- 04:45 PM EST Sunset
Mon -- 06:09 PM EST 0.00 feet Low Tide
Mon -- 06:39 PM EST Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
Click for Map
Mon -- 06:18 AM EST 0.47 feet Low Tide
Mon -- 06:53 AM EST Sunrise
Mon -- 08:34 AM EST Moonrise
Mon -- 11:11 AM EST 1.45 feet High Tide
Mon -- 04:44 PM EST Sunset
Mon -- 05:25 PM EST -0.01 feet Low Tide
Mon -- 06:39 PM EST Moonset
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 State College, PA (0,6,7,8)(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.