Wednesday, April21, 2021
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Marine Weather and Tides
Accident, MD

Version 3.4
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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 6:31AMSunset 8:05PM Wednesday April 21, 2021 6:15 AM EDT (10:15 UTC) Moonrise 12:42PMMoonset 2:43AM Illumination 70% 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 Accident, MD
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location: 39.56, -79.36     debug


Area Discussion for - Pittsburgh, PA
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FXUS61 KPBZ 210911 AFDPBZ

Area Forecast Discussion National Weather Service Pittsburgh PA 511 AM EDT Wed Apr 21 2021

SYNOPSIS. Snow showers along with gusty wind and much colder temperatures are expected today into Thursday. Dry conditions and more seasonable temperature returns Friday before rain returns later Saturday with crossing low pressure.

NEAR TERM /UNTIL 6 PM THIS EVENING/. Widespread snow showers will accompany a crossing cold front this morning before becoming more isolated to scattered this afternoon as the low lifts out and boundary layer moisture decreases. Upper troughing and cold northwesterly flow aloft combined with lake enhancement will continue ongoing precipitation potential through Thursday. Most locations will see some light accumulation on elevated and grassy surfaces (as currently being observed on upstream webcams) this morning but with road temperatures currently in the 40s and 50s and ground temperatures in the mid 50s or higher across the region (morels have been popping for a couple weeks already after warmer temperatures earlier in the month) . snow this morning will not have a big impact on the morning commute. So far this morning visibilities have been observed to drop between 1/2 and 2 miles along and just behind the front where the most intense snowfall is occurring and this should continue as the front crosses the forecast area this morning.

The biggest impact to sensible weather with this system will be the much colder temperatures and gusty winds gusting to around 30mph on average. Strong cold air advection behind the front will persist all day and keep temperatures from increasing much . if at all. Opted to lean more heavily on direct model output for today's temperatures as blends and MOS often perform poorly on strong thermal advection days With that. daytime highs are now forecast to largely remain below 40 across the region with wind chill values in the mid to upper 20s.

The current low max record for PGH on April 21st is 41F . and 38F is the current forecast high.

SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY NIGHT/. Overnight lows are forecast to be in the 20s across the region overnight which is between 15 and 20 degrees below normal for most locations. With that, the Freeze Watch has been upgraded to a Freeze warning for areas where the growing season is underway through early Thursday Although warmer. temperatures will remain below normal under the upper trough with a few isolated flurries sprinkles possible during the along the I-80 corridor and in the ridges with a crossing shortwave. Clouds will decrease and winds will lessen Thursday night as ridging builds in aloft . allowing for more radiational cooling and temperatures falling back to around freezing once again. Additional Frost Advisories and/or Freeze Warning may be needed.

LONG TERM /FRIDAY THROUGH TUESDAY/. Dry weather returns Friday into Saturday as high pressure briefly regains control. Temperatures will moderate for Friday/Friday night as southwest low-level flow develops. Rain will return Saturday afternoon into Sunday morning as another low pressure system impacts the region.

Dry weather and well above normal temperatures are expected at least through the first half of next week as ridging builds across the eastern CONUS.

AVIATION /09Z WEDNESDAY THROUGH SUNDAY/. Snow is overspreading the region this morning from the west as a sfc low tracks across the area. Associated MVFR, with periods of IFR, will continue through the morning. Cigs will lift and most precipitation will end by this afternoon as the sfc low exits the region, though VFR stratocu is expected through the period.

Gusty NW wind is expected through this afternoon with tightening pressure gradient and mixing.

Outlook. Restrictions are likely again with weekend low pres.

PBZ WATCHES/WARNINGS/ADVISORIES. PA . Freeze Warning from 1 AM to 10 AM EDT Thursday for PAZ020-021-029- 031-073-075. OH . Freeze Warning from 1 AM to 10 AM EDT Thursday for OHZ039-040- 048>050-057>059-068-069. WV . Freeze Warning from 1 AM to 10 AM EDT Thursday for WVZ001>004-012- 021-509>511-513.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Garrett County Airport, MD2 mi21 minNW 810.00 miPartly Cloudy34°F32°F93%1005.4 hPa

Link to 5 minute data for K2G4

Wind History from 2G4 (wind in knots)
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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