Thursday, December12, 2019
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Marine Weather and Tides
West Homestead, 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 7:31AMSunset 4:54PM Thursday December 12, 2019 5:54 AM EST (10:54 UTC) Moonrise 5:30PMMoonset 7:50AM Illumination 100% Phase: Full Moon; Moon at 15 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 West Homestead , PA
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location: 40.4, -79.91     debug


Area Discussion for - Pittsburgh, PA
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FXUS61 KPBZ 120838 AFDPBZ

Area Forecast Discussion National Weather Service Pittsburgh PA 338 AM EST Thu Dec 12 2019

SYNOPSIS. Dry and relatively warmer weather will continue today into Friday before a low pressure system returns rain to the area Friday night and Saturday.

NEAR TERM /THROUGH TODAY/. Light snow has ended across the forecast area this morning as sfc high pressure builds across the region. Lingering cloud cover remains only across the PA/MD ridges, but this too will diminish within the next couple of hours. Light wind and clear skies will allow temperatures across much of the area to drop into the teens by dawn.

Strong, southerly return flow will begin today with eastward progression of the sfc high and a digging trough across the upper Midwest. WAA will drive temperatures up nearly 10 degrees higher than Wednesday, though still a couple degrees below seasonal average. Otherwise, quiet and mostly sunny(!) weather continues.

SHORT TERM /TONIGHT THROUGH SATURDAY/. Continued warm, moist advection will slowly saturate the column overnight in advance of a mid-level shortwave trough, resulting in increasing cloud cover once again this evening. A warmer airmass along with the effects of cloud cover will result in minimum temperatures Friday morning around 10 degrees warmer than those of this morning and close to seasonal norms.

The aforementioned mid-level wave will force weak cyclogenesis across the Southeast US tonight, resulting in a sfc wave lifting north as an eventual coastal low on Friday. While the low will remain to our east while sliding up the coast, warm/moist air will overrun a cold sfc layer in the ridges Friday late morning into the afternoon. The complicated thermal profile will be favorable for freezing rain and possible sleet mixing in with rain and snow in portions of the higher elevations until the sfc warms to above freezing. Additional freezing rain will be possible Friday evening as locations in the ridges drop back below freezing with warm air aloft. Some ice accumulation will be possible, especially across Garrett County, MD, and headlines may be needed.

Outside of freezing rain, a decent rainfall event is likely with this system as QPF values from 0.5 to 1 inch are expected over much of the forecast area through the weekend.

Warm advection will push afternoon temperatures on Friday and Saturday into the 40s.

LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/. Rain will transition to a mix of rain/snow or all snow Saturday night into Sunday morning as temperatures cool with cold advection in the wake of the low. At this time, do not expect much in the way of snow accumulation outside of light amounts in the ridges and higher elevations given lack of deep moisture in the dendritic growth zone. Continued westerly flow will also be unfavorable for typical, post- frontal upslope snow.

Considerable model uncertainty continues with respect to the potential winter system Monday into Tuesday. Latest EC keeps the weak, crossing low to our south, keeping most of the CWA in the cold sector and in play for winter weather for much of the event. GFS, however, pushes a more robust low to our west and north across Lake Erie, limiting winter p-types to brief overrunning with the warm front. Given the uncertainty at this time, the winter weather threat for snow and ice will need to be monitored over the next several days.

Expect temperatures to remain near seasonal average Sunday through Tuesday, depending on the track of the sfc low, with a cool down on Wednesday.

AVIATION /07Z THURSDAY THROUGH MONDAY/. VFR conditions are expected through the forecast period.

Outlook. Restrictions are likely this weekend with crossing low pressure.

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 - Allegheny County Airport, PA4 mi62 minSE 58.00 miFair19°F14°F81%1037.6 hPa
Pittsburgh, Pittsburgh International Airport, PA18 mi64 minN 010.00 miFair17°F12°F84%1038 hPa

Link to 5 minute data for KAGC

Wind History from AGC (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 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 (5,6,7,8)
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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.