Marine Weather and Tides
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.
|Sunrise 5:47AM||Sunset 8:52PM||Sunday June 13, 2021 9:50 AM EDT (13:50 UTC)||Moonrise 7:20AM||Moonset 10:47PM||Illumination 13%|
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 131329 AFDPBZ
Area Forecast Discussion National Weather Service Pittsburgh PA 929 AM EDT Sun Jun 13 2021
SYNOPSIS. Shower and thunderstorm chances are expected today with a crossing cold front. Periodic shower and thunderstorm chances should continue Monday and Tuesday before high pressure return dry and cooler weather by mid week.
NEAR TERM /THROUGH TONIGHT/. The majority of morning convection has traveled sely and out of the area this morning as a shortwave propagates se. Shortwave ridging will ensue, but generally speaking isolated thunderstorms will remain possible until a more widespread chance this afternoon.
According to the 12z PIT observation sounding, sufficient shear (near 40kt 0-6km) and instability (2000-2500j/kg fcst surface CAPE) will aid in the development of severe storms coincident with ample sfc convergence via frontogenesis. Considering the hodograph,multi- cellular organized thunderstorms with damaging wind gusts proceeding outflow boundaries looks probable. Initially, cells will carry a large hail threat before transitioning to a cold pool dominant complex.
The highest chance of seeing this potential will be this afternoon during peak heating, as the front is expected to be located from NW PA to SE OH. SPC has this area, and points E-SE, in the Slight Risk/scattered coverage area for potential severe thunderstorms. FROPA should occur earlier for the W-NW, where a lesser Marginal/isolated potential for severe storms exists.
Locally heavy rain is possible in poorly drained areas, though quick storm movement should be sufficient to preclude a significant flood potential.
SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/. An approaching Great Lakes shortwave trough is expected to approach the region Monday, along with a secondary sfc trough/cold front. Scattered/numerous showers and thunderstorms are again expected to develop with the increasing shortwave support, and jet driven ascent. Strong unidirectional shear and dry mid level air should again result in a severe thunderstorm potential, though the amount of instability is more in question than for Sunday. SPC has most of the forecast area in a Marginal Risk for severe storms on Monday.
Another reinforcing trough should maintain scattered showers/storms for Tuesday, though instability and shear levels should be too low for any organized severe thunderstorm potential.
Dry weather should return Tuesday night as sfc high pressure builds under a developing Ern CONUS long wave trough.
LONG TERM /WEDNESDAY THROUGH SATURDAY/. The longwave trough should persist across the Ern CONUS through Thursday before exiting the coast. High pressure building under the trough should result in dry and cooler than average weather Wed and Thu. Another trough approaching from the Upper Midwest should return shower and thunderstorm chances to the region late Friday and Saturday.
AVIATION /13Z SUNDAY THROUGH THURSDAY/. Morning thunderstorms with an initial passing shortwave will generally remain north of I-76 and south of I-80 this morning. These will miss the TAF sites for the most part, although thunder may be heard at a terminal or two. Outside of these storms, VFR will continue, and any patchy MVFR fog will burn off fairly quickly.
By midday, cumulus are expected to develop. As a cold front approaches the region, thunderstorms are expected to develop along and ahead of it. The front should be located from NW PA to SE OH by afternoon peak heating, when the greatest chances of seeing thunderstorms is expected. For these terminals, included an MVFR TEMPO group for thunder, with VCTS elsewhere where lesser chances exits.
The showers and thunderstorms should end this evening as the front completes its passage, with VFR returning.
Outlook. Periodic rain chances from passing shortwaves within a developing eastern U.S. trough may also create intermittent restrictions through Tuesday. VFR under high pressure is expected by mid-week.
PBZ WATCHES/WARNINGS/ADVISORIES. PA . None. OH . None. WV . None.
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|Pittsburgh - Allegheny County Airport, PA||4 mi||58 min||ENE 4||5.00 mi||Fog/Mist||69°F||66°F||90%||1012.1 hPa|
|Pittsburgh, Pittsburgh International Airport, PA||19 mi||60 min||ESE 4||9.00 mi||Overcast||70°F||65°F||84%||1012.3 hPa|
Link to 5 minute data for KAGC
Wind History from AGC (wind in knots)
|1 day ago||E||E||E||NE||E||NE||E||NE||SE||E||E||E||Calm||NE||Calm||Calm||NE||N||NE|
|2 days ago||NE||E||E||S|
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