Marine Weather and Tides
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.
|Sunrise 5:55AM||Sunset 8:36PM||Wednesday May 22, 2019 8:40 AM EDT (12:40 UTC)||Moonrise 11:19PM||Moonset 8:04AM||Illumination 88%|
7 Day Forecast for Marine Location Near Whitaker , PAHourly EDIT Help
Area Discussion for - Pittsburgh, PA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kpbz 220755|
area forecast discussion
national weather service pittsburgh pa
355 am edt Wed may 22 2019
Rain chances return late today as a weak upper level wave moves
through. A better chance for showers and storms on Thursday with a
crossing cold front.
Near term until 6 pm this evening
Most of the day looks dry and warm with a building ridge aloft and
surface high pressure. A weak upper level wave will hit strong
resistance late this afternoon and evening as it bangs into ongoing
height rises over the region. Have pulled back on pops late this
afternoon evening and kept thunder more isolated. Increased
subsidence from the aforementioned ridge, and a capped atmosphere due
to warm advection, will make it tough for any convection to develop.
Forecast soundings show little instability, with most of that over
ohio. What upper level support does exist, will likely be used trying
to halt the northward expansion of the eastern CONUS ridge.
Additionally, the area may not reach convective temperatures and
surface dewpoints may be held down due to a more southeasterly flow.
A nice rebound in temperatures today.
Short term 6 pm this evening through Friday
Minor height falls are expected overnight and any showers that do
develop will end quickly with a decrease in large scale ascension and
A better chance for convection will arrive on Thursday as a cold
front approaches and slowly moves through the area. Seeing some
timing and intensity differences between the models, mostly centered
around the strength and timing of a shortwave trough. Have focused
higher pops in the afternoon and evening as well as convection, using
the cold front as a guide. Atmosphere does destabilize Thursday
ahead of the front, but temperatures aloft remain rather warm until
shortwave energy crosses. Forecast soundings are indicating the cap
will hold until the cooler air aloft arrives. Much of the upper
level energy will initially be used to flatten the ridge, but there
will be enough left to drive the front through my cwa. There remain
minor model differences in atmospheric destabilization Thursday
afternoon, but all are still showing rather impressive buoyancy.
Low-level lapse rates will increase as will wind shear values, which
may lead to strong to severe storms ahead of the cold front. Pre-
frontal cloud cover and showers will play a role, as the lack of
full Sun could prevent convective temps from being reached. There are
some indications that all of the necessary ingredients will be more
readily available over the southern half of the area late Thursday.
If this holds, areas from pit-south and east could be the focus for
Front may get held up a bit Thursday evening as the shortwave trough
energy evaporates and height falls slow. This will need to be
monitored in future forecasts to allow for correct timing of the end
of showers storms over the south. All activity will end late
Rapid height rises are expected Friday as is another push of warm
air. Will leave Friday dry due to the increase in subsidence, the
development of a cap, thanks to the warm temperatures aloft, and
stable lower levels.
Temperatures Friday should be close to late may normals.
Long term Friday night through Tuesday
The strength and position of the eastern ridge will be the driving
factor for the long term weather. Ensemble data is in good agreement
that the area will lie in the zonal flow just on the northern flank
of the ridge. Precipitation will be driven by shortwave energy that
moves through the upper flow and if this energy is able to push any
surface boundaries through. It is possible that a weekend cold front
could get held up near or over the area as it will be unable to
move southward due to the strong ridge over the southeastern us. If
this comes to fruition, the extended would likely portray an
unsettled forecast, particularly by the end of the weekend and into
early next week.
Aviation 08z Wednesday through Sunday
Vfr conditions will prevail through the TAF period. Wind will veer se
after dawn today as high pressure gets displaced to the east. Gusts
near or in excess of 20 knots will be possible through the day.
A weak disturbance will move through late in the afternoon, possibly
bringing a few showers and even a tstorm to the region. However,
confidence is quite low so have kept out of TAF package with the
exception of zzv.
Periodic restrictions are possible through the weekend as
disturbances round the upper level ridge.
Pbz watches warnings advisories
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Pittsburgh - Allegheny County Airport, PA||4 mi||48 min||ESE 8||10.00 mi||Overcast||53°F||43°F||69%||1021.9 hPa|
|Pittsburgh, Pittsburgh International Airport, PA||19 mi||50 min||E 7||10.00 mi||Overcast||52°F||43°F||72%||1022 hPa|
Wind History from AGC (wind in knots)
|1 day ago||W|
|2 days ago||S||S||S|
EDIT Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES Local Image of Mid-Atlantic EDIT
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.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Pittsburgh, PA (8,2,3,4)(on/off)  Help
Ad by Google
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.