Monday, August21, 2017 L-36.com


Marine Weather and Tides
Bethel Park, PA

Version 3.4
What's New / NOTES
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 6:36AMSunset 8:09PM Monday August 21, 2017 1:59 PM EDT (17:59 UTC) Moonrise 5:20AMMoonset 7:15PM Illumination 0% Phase: New Moon; Moon at 29 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Bethel Park , PA
   Hourly   EDIT   Help
location: 40.34, -80.02     debug


Area Discussion for - Pittsburgh, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kpbz 211716 aac
afdpbz
area forecast discussion... Updated
national weather service pittsburgh pa
116 pm edt Mon aug 21 2017

Synopsis
A sequence of weak upper-level disturbances will provide
isolated showers and thunderstorms today. Widespread showers
and thunderstorms are expected on Tuesday as a cold front
crosses the region.

Near term through tonight
Convection from this morning that took advantage of the modest
instability noted in the 12z sounding has subsided as the low-
amplitude trough that supported it continues to move ewd.

Shortwave ridging will spell a brief erosion of convective
cloud cover, though cirrus may still provide at least a partial
obscuration of the sky during peak eclipse viewing.

A second, weak shortwave trough over central oh will advance
ewd this afternoon and may provide a second round of modest
convection as low-level warm advection weakens the h7 inversion.

Lacking any focused sfc boundary, broad pops were employed in
the forecast this afternoon along the diffuse warm front.

Any showers and storms will weaken this evening with loss of
heating, and some clearing is expected in the wake of the
associated shortwave trough.

Short term Tuesday through Wednesday night
A strong upper low will dig into the great lakes on Tue and
acquire a neutral to negative tilt through the day in concert
with the movement of a mid-level jet maximum. The system's
associated cold front will approach the ohio valley during the
early evening, but a prefrontal trough is expected to be the
focus for daytime convection in the area.

Abundant low-level moisture, steepening lapse rates and strong
effective bulk shear will support the development of strong to
severe thunderstorms by early afternoon along the sharpening sfc
trough. CAPE on the order of 2000 j kg and effective shear of
40-50kt will promote organized, severe convection.

Given the deep-layer shear orientation roughly parallel to the
sfc feature, storms should congeal quickly into an intense
convective line that will move sewd into the instability axis.

Damaging wind gusts will be the primary threat, but hail also is
possible in more intense, cellular updrafts ahead of the line.

Storms will exit sewd by early evening with rain lingering into
the evening behind the storms as the cold front traverses the
region. High pressure will build in on Wed wed eve, with little
chance of rain as dry air invades.

Long term Thursday through Sunday
Broad surface high pressure under an ern-conus trough is
progged to support a dry and cooler-than-average air mass
through the period.

Aviation 17z Monday through Friday
GeneralVFR is expected for the period although a crossing
shortwave may spawn isold to sct convection. Expect rapid
deterioration of conditions on Tuesday as widespread precip will
herald the advance of cold front.

Outlook
With passage of an early Wed cold front, generalVFR can be
expected for the remainder of the week.

Pbz watches warnings advisories
Md... None.

Oh... None.

Pa... None.

Wv... None.

Update... Kramar


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pittsburgh - Allegheny County Airport, PA5 mi67 minSSW 1010.00 miPartly Cloudy84°F68°F59%1021.3 hPa
Pittsburgh, Pittsburgh International Airport, PA16 mi69 minSSW 10 G 1510.00 miPartly Cloudy85°F66°F55%1021.4 hPa

Wind History from AGC (wind in knots)
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
Last 24hrCalmCalmSE4S6S4S3SE4SE3SE3SE5S4SE4SE4SE3SE5S7S7S7S7W7
G17
S7S6S10SW9
1 day agoSW12SW12
G22
NW15
G27
NW5SE6S3S5SE4S5S5CalmSE3S5CalmCalmCalmCalmCalmCalmSE3CalmCalmCalm--
2 days agoW9
G18
W11
G18
W12
G21
W10
G23
W10
G17
W6W8SW6W5W6W5W7W6W6SW6SW6SW6SW5SW6SW9W9S7W8SW12
G17

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Pittsburgh, PA (13,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Pittsburgh, PA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Disclaimer:
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.