Friday, December6, 2019
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Marine Weather and Tides
Thornburg, PA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:27AMSunset 4:54PM Friday December 6, 2019 12:19 AM EST (05:19 UTC) Moonrise 2:11PMMoonset 1:40AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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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7 Day Forecast for Marine Location Near Thornburg , PA
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location: 40.44, -80.08     debug


Area Discussion for - Pittsburgh, PA
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FXUS61 KPBZ 060333 AFDPBZ

Area Forecast Discussion National Weather Service Pittsburgh PA 1033 PM EST Thu Dec 5 2019

SYNOPSIS. Dry and seasonable conditions are expected overnight under surface high pressure. A cold front will return precipitation chances Friday.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/.

Evening Update: No major changes have been made to this forecast period.

Previous Discussion:

Zonal flow has mostly been re-established allowing skies to clear in several areas but high clouds will filter in gradually overnight ahead of an encroaching shortwave and its subsequent cold front.

SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY NIGHT/. Low level wrly flow should shift swly early Friday as surface high pressure advances eastward, with warm advection aiding in the recovery to near average temperature through midday. A Great Lakes shortwave trough is expected to advance across northern portions of the forecast area during the afternoon, increasing rain / snow chances through Friday evening. This disturbance appears weak as better forcing for ascent is progged across the Great Lakes. Forecast soundings also suggest the presence of low- level dry air hampering the development of a deep, moist boundary layer, resulting in generally light rain / snow amounts.

Meanwhile, a southern stream shortwave is progged to increase rain / snow chances across northern WV and for the PA and MD ridges Friday. Similarly, forcing for ascent appears weak, thus precipitation accumulation amounts should be minor.

Precipitation chances end Friday night with building sfc high pressure. Near-neutral temperature advection will maintain below average temperature given quasi-zonal flow aloft through Saturday. A pattern shift is then anticipated Sunday as a Hudson Bay low deepens, returning swly flow and warm advection aloft. Above average temperature is expected Sunday, with surface high pressure prevailing.

LONG TERM /MONDAY THROUGH THURSDAY/. Stratiform rain chances increase Monday as a series of shortwaves impact the region on the van of the deepening Hudson Bay low and associated central Plains trough. Deep moisture transport is expected given strong jet support, with PWAT values in exceedance of the climatological 90th percentile. This should support widespread rain Monday into Tuesday.

Long term model blends agree on the arrival of an arctic front by Tuesday / Wednesday, changing rain over to snow given cold advection in nwly flow behind the frontal passage. Wednesday high temperature should top out 15 to 20 degrees below average. Some moderation, albeit limited, is expected Thursday as flow aloft becomes quasi- zonal.

AVIATION /04Z FRIDAY THROUGH TUESDAY/. Shortwave ridging has brought VFR to regional terminals. Cloud cover is expected to increase once again tomorrow as the next in series of shortwaves affects area ports. A brief period of low- level wind shear is likely in the morning before surface wind responds to the trough. In addition, scattered showers are possible tomorrow afternoon, but given limited moisture, should not bring widespread restrictions other than a MVFR cloud deck.

Outlook. More restrictions are likely early next week with the next disturbance.

PBZ WATCHES/WARNINGS/ADVISORIES. MD . None. OH . None. PA . None. WV . None.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pittsburgh, Pittsburgh International Airport, PA9 mi28 minSSE 410.00 miA Few Clouds30°F23°F75%1020.4 hPa
Pittsburgh - Allegheny County Airport, PA10 mi26 minS 510.00 miFair31°F23°F72%1020.3 hPa

Link to 5 minute data for KPIT

Wind History from PIT (wind in knots)
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS Local Image of    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 (0,6,7,8)
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Ground Weather Radar Station Pittsburgh, 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.