Tuesday, December10, 2019
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Marine Weather and Tides
Murrysville, 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 7:29AMSunset 4:53PM Tuesday December 10, 2019 12:15 PM EST (17:15 UTC) Moonrise 4:03PMMoonset 5:40AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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 Murrysville , PA
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location: 40.45, -79.68     debug


Area Discussion for - Pittsburgh, PA
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FXUS61 KPBZ 101708 AAB AFDPBZ

Area Forecast Discussion . UPDATED National Weather Service Pittsburgh PA 1208 PM EST Tue Dec 10 2019

SYNOPSIS. Rain will linger into the afternoon and overnight south and east of Pittsburgh. Minor snow accumulations are expected, mostly limited to the ridges and higher elevations. Dry and cooler conditions are expected through Thursday before a warm-up this weekend.

NEAR TERM /THROUGH TONIGHT/. A strong mid-level jet remains oriented SW-NE across the Ohio Valley ahead of a broad trough in the north-central CONUS, while a sfc front makes steady progress across the region. Temperature has dropped ~10F with its passage over the last several hours. Widespread rain continues in association with the jet/warm advection regime ahead of the front.

The cold air is expected to lag the precipitation for much of the day as the entire system translates ewd. However, by mid-afternoon, the cold air may overlap sufficiently with the precipitation to effect a transition to snow in the sern quadrant of the forecast area. Although impactful accumulation is not expected, the greatest accumulation will be in the ridges, where snow ratios will be more efficient as a result of better overlap of moisture with the DGZ.

A surge of much colder air over MI is making slow progress across Lake Erie this morning, but lake-effect showers will develop this afternoon and spread ewd as the upper trough advances. These showers may move across the far-nrn zones late today/tonight, with occasional brief bursts of snow possible.

As cold advection continues, temperature will maintain its fall through tonight, with minima reaching the low-mid 20s late tonight despite sustained cloud cover.

SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/. Colder and drier air will arrive on Wed as high pressure begins to build across the region in the wake of the exiting upper trough and downstream of a wrn-CONUS ridge. Amid clearing sky, light wind and building sfc high pressure, temperature seems likely to fall considerably more on Wed night, potentially into the mid-teens in many areas.

Flow aloft will flatten on Thu, aiding in the progressive exit of sfc high pressure and an eventual development of sly return flow. Although Wed will be cold and potentially peaking in the upper 20s, Thu will see a steady warm-up into the 30s (albeit still below seasonal average) amid increasing sunshine.

LONG TERM /FRIDAY THROUGH MONDAY/. There remains higher confidence in the evolution of the upper-air pattern late in the week, as an upper trough amplifies in the central CONUS. This pattern will support increasing swly flow and strong warm advection for the Ohio Valley, leading to seasonably warm days and increasing chances for rain, particularly over the weekend.

AVIATION /18Z TUESDAY THROUGH SUNDAY/. An incoming shortwave trough will bring a return of MVFR cigs areawide while shunting the shield of stratiform rain south and east of the region today. Residual precipitation will turn over to snow for areas along the eastern ridges by this aftn, but snow is not expected to be heavy with little accumulation given intrusion of drier air and waning upper-level support.

The crossing of the upper trough tonight into Wednesday morning will further push the dry slot over the region and eliminate restrictions west to east. Building sfc high pressure should keep most areas VFR Wednesday.

Outlook. Restrictions are likely with the next low pressure system this weekend.

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



Update . Kramar


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pittsburgh - Allegheny County Airport, PA15 mi22 minWNW 9 G 1710.00 miOvercast39°F32°F76%1013.7 hPa
Latrobe / Westmorland, PA19 mi28 minWSW 10 G 1510.00 miOvercast43°F33°F71%1013.5 hPa

Link to 5 minute data for KAGC

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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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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 Pittsburgh, PA (12,3,4,5)
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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.