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Marine Weather and Tides
Version 3.4 |
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 6:30AM | Sunset 6:02PM | Friday March 5, 2021 2:50 PM EST (19:50 UTC) | Moonrise 12:32AM | Moonset 10:26AM | Illumination 54% | ![]() |
ANZ530 Chesapeake Bay North Of Pooles Island- 1240 Pm Est Fri Mar 5 2021
.small craft advisory in effect until midnight est tonight...
.small craft advisory in effect from Saturday morning through Saturday afternoon...
This afternoon..NW winds 15 kt with gusts to 25 kt. Waves 2 ft.
Tonight..NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Sat..NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Sat night..NW winds 5 to 10 kt. Waves 1 ft.
Sun..NW winds 5 to 10 kt. Waves 1 ft.
Sun night..N winds 5 to 10 kt. Waves 1 ft.
Mon..SW winds 5 to 10 kt. Waves 1 ft or less.
Tue..SW winds 5 to 10 kt. Waves 1 ft.
.small craft advisory in effect until midnight est tonight...
.small craft advisory in effect from Saturday morning through Saturday afternoon...
This afternoon..NW winds 15 kt with gusts to 25 kt. Waves 2 ft.
Tonight..NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Sat..NW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Sat night..NW winds 5 to 10 kt. Waves 1 ft.
Sun..NW winds 5 to 10 kt. Waves 1 ft.
Sun night..N winds 5 to 10 kt. Waves 1 ft.
Mon..SW winds 5 to 10 kt. Waves 1 ft or less.
Tue..SW winds 5 to 10 kt. Waves 1 ft.
ANZ500 1240 Pm Est Fri Mar 5 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will slowly build over the waters through Sunday before moving offshore during the early and middle portions of next week. A small craft advisory may be needed for portions of the waters Saturday night into early Sunday.
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will slowly build over the waters through Sunday before moving offshore during the early and middle portions of next week. A small craft advisory may be needed for portions of the waters Saturday night into early Sunday.
7 Day Forecast for Marine Location Near Refton, PA
Hourly EDIT Help
location: 39.88, -76.27 debug
Area Discussion for - State College, PA
  (on/off)  Help NOTE: mouseover dotted underlined text for definitionFXUS61 KCTP 051935 AFDCTP
Area Forecast Discussion National Weather Service State College PA 235 PM EST Fri Mar 5 2021
SYNOPSIS. A brisk cold spell will last through the weekend and precede a big warmup during the first half of next week. A frontal system will bring the chance for rain Thursday into next weekend.
NEAR TERM /THROUGH TONIGHT/. Plume of best moisture is starting to shift northward, finally, and decreasing the clouds over the Laurels, and increasing them over the northern Alleghenies. Dewpoints are on track despite a significant drop over the NErn mtns where IPT, LHV and N38 have all touched or dropped below 0F.
One final trough/push of colder air will move down through Central PA overnight. This will renew SHSN over the Alleghenies, and could make a dusting to an inch there. Few if any clouds should make it down into the lower Susq. If they do, they'll be sct and high-based. The wind will continue all night, but gusts should peak this evening and early tonight around and just before the passage of the trough. Mins will be in the upper teens N and m20s S.
SHORT TERM /SATURDAY/. The surge of cold air will keep it cold and breezy/gusty through the day on Sat. But, the SHSN and flurries will slowly decrease into the aftn as the inversion lowers a bit and wind backs a little in the llvls. The sfc high moving down from central Canada will be centered over the Upper Great Lakes on Sat, and continue moving to the SE. The best chc for more sun than clouds is the srn tier. Maxes should hold a deg or two lower than Fri.
LONG TERM /SATURDAY NIGHT THROUGH FRIDAY/. With brisk and cold northwest flow remaining in place through the weekend, we were keen to make the following minor adjustments to the previous forecast in accordance with the prevailing pattern:
1. Trimmed a few degrees from daytime highs Sun. 2. Increased POPs for passing snow showers in the northern mtns 3. Added/subtracted a few degrees from minTs Sat/Sun night 4. Lowered dewpoints given abnormally dry/modified arctic air
Snow accumulation by the end of weekend should range from a coating to an inch or so across the northern tier of CPA. Most of the accums will occur at night as the strong March sun mitigates daytime impact. Dry air and mostly frozen Lake Erie will both contribute to limited LES.
1030+mb high pressure builds into the area on Sunday ending snow shower activity. We see some risk to the downside for lows Sunday night with potential for ideal radiational cooling as sfc ridge axis moves into CPA.
In the big picture, our ensemble prediction systems have remained consistent of late, showing a significant warming for next week, as a deep eastern Canadian vortex fills and shifts into the north Atlantic.
This will allow ridging to push towards the eastern CONUS, with our low-level flow backing into the W and SW, heralding the arrival of Spring- like temperatures (highs ranging from the 50s-mid 60s by the middle of next week). Although much of this time frame looks dry from this early vantage point, both moisture and model uncertainty look to be on the increase towards the end of the forecast period (late Wed. onward), so the threat of showers could be looming by that time. Overall, though, the main theme is for a trend towards pleasant, early Spring type weather from Mon. through Wed.
AVIATION /19Z FRIDAY THROUGH WEDNESDAY/. Wind is the biggest story, with frequent gusts into the m-u20s which should peak this afternoon and evening. The wind should decrease a little tonight and a little more Saturday and even more on Sunday.
Low clouds and snow showers lingered significantly longer than expected over JST. However, we are still expecting the clouds clouds have begun the anticipated rise northward. A weak trough will drop across the region late tonight. The lift from the trough combined with the continued influx of lake moisture will generate snow showers over the nrn mtns (mainly BFD) tonight with short reductions into IFC. The SHSN should dissipate Sat AM. Most terminals will have just MVFR cigs later tonight with only a passing flurry or two. Of course, MDT and LNS will likely stay VFR.
High pressure will continue to press south and east from central Canada and the Upper Great Lakes. Sunday dries out completely with not much in the way of clouds or weather.
Outlook .
Mon-Wed . Occasional M/VFR clouds NW, otherwise no sig wx.
FIRE WEATHER. Spring fire season is starting in parts of CPA. Gusty winds and low RHs are forecast for the weekend. Many locations, especially across the southern half to two-thirds will drop into the 20-30pct range of RH during each afternoon. The wind will decrease slightly each day, and should be very light on Monday as a large high pressure works down from Canada and becomes centered over the eastern U.S.
The latest fuel moisture assessment from PA BOF partners indicated no critical fuel moisture conditions are expected over the weekend. This thankfully offsets critical fire wx risk due to low RH+gusty winds and therefore we do not anticipate issuing headlines at this time.
CLIMATE. Daylight saving time begins on Sunday, March 14th.
The first day of astronomical spring (vernal equinox 2021) will be at 5:37 A.M. EDT on Saturday, March 20th.
CTP WATCHES/WARNINGS/ADVISORIES. None.
SYNOPSIS . Dangelo/Steinbugl NEAR TERM . Dangelo SHORT TERM . Dangelo LONG TERM . Jurewicz/Lambert/Wagner AVIATION . Dangelo FIRE WEATHER . CLIMATE .
Weather Reporting Stations
EDIT (on/off)  Help NOTE: Click on distance to see the station location on a mapStations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
CHCM2 - 8573927 - Chesapeake City, MD | 34 mi | 50 min | NW 12 G 25 | 37°F | 40°F | 1015.1 hPa (-2.2) | ||
DELD1 - 8551762 - Delaware City, DE | 42 mi | 50 min | NW 14 G 25 | 37°F | 1014.5 hPa (-2.1) | |||
RDYD1 - 8551910 - Reedy Point, DE | 43 mi | 50 min | 36°F | 39°F | 1014 hPa (-2.4) | |||
BLTM2 - 8574680 - Baltimore, MD | 45 mi | 50 min | NNW 9.9 G 19 | 38°F | 41°F | 1016 hPa (-2.4) | ||
MRCP1 - 8540433 - Marcus Hook, PA | 46 mi | 50 min | 37°F | 41°F | 1013.8 hPa (-2.1) | |||
TCBM2 - 8573364 - Tolchester Beach, MD | 46 mi | 50 min | WNW 18 G 25 | 37°F | 41°F | 1016.2 hPa (-2.5) | ||
FSKM2 - 8574728 - Francis Scott Key Bridge, MD | 48 mi | 50 min | WNW 24 G 29 | 37°F | 1015.8 hPa (-2.9) | |||
FSNM2 | 48 mi | 56 min | WNW 23 G 28 | 36°F | 1015.4 hPa |
Wind History for Chesapeake City, MD
(wind in knots) EDIT (on/off)  Help3 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 24hr | NW G20 | NW G17 | NW G14 | NW G24 | N G15 | N G14 | NW G11 | NW G17 | NW G17 | NW G16 | NW G13 | NW G15 | NW G18 | NW G18 | NW G18 | NW G17 | NW G17 | NW G19 | NW G22 | NW G18 | NW G21 | NW G23 | NW G22 | NW G25 |
1 day ago | SW | NW G9 | SW G9 | W | W | NW | NW | S | -- | -- | S | N | N G8 | -- | -- | S | SE | NW G10 | NW G15 | NW G17 | N G16 | NW G15 | NW G16 | NW G21 |
2 days ago | NW G12 | NW G11 | NW G7 | W | -- | -- | -- | SW | SW | SW | SW | SW | S | SW | SW | S | S | SW | SW G9 | SW G13 | NW G10 | W G10 | SW G7 | SW |
Airport Reports
EDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
Lancaster, Lancaster Airport, PA | 17 mi | 57 min | W 22 G 27 | 10.00 mi | Fair and Breezy | 39°F | 6°F | 25% | 1014.7 hPa |
Chester County Airport, PA | 23 mi | 55 min | NW 15 G 25 | 10.00 mi | Fair | 36°F | 5°F | 27% | 1014.2 hPa |
Link to 5 minute data for KLNS
Wind History from LNS (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 24hr | N | NW G21 | N G19 | N | N | N | NW | NW G25 | W | NW | NW | NW | NW G18 | NW G23 | NW | NW G19 | NW G19 | NW | W G23 | NW G24 | NW G24 | W G24 | NW G27 | W G27 |
1 day ago | W | W | SW | SW | Calm | W | SW | NW | W | NE | SW | SE | NW | Calm | NW | NW | NW | W | W | NW | N | NW | NW G20 | W |
2 days ago | W G18 | W | W | W | SW | SW | Calm | Calm | Calm | Calm | Calm | Calm | S | Calm | Calm | Calm | W | Calm | W | W | W G16 | W | W | W G18 |
Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
EDIT Weekend mode (on/off) (on/off)  Help One Week of DataPort Deposit
Click for Map
Fri -- 12:31 AM EST Moonrise
Fri -- 02:53 AM EST 1.67 feet High Tide
Fri -- 06:31 AM EST Sunrise
Fri -- 09:57 AM EST -0.40 feet Low Tide
Fri -- 10:26 AM EST Moonset
Fri -- 03:40 PM EST 2.61 feet High Tide
Fri -- 06:01 PM EST Sunset
Fri -- 08:32 PM EST Last Quarter
Fri -- 11:55 PM EST 0.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:31 AM EST Moonrise
Fri -- 02:53 AM EST 1.67 feet High Tide
Fri -- 06:31 AM EST Sunrise
Fri -- 09:57 AM EST -0.40 feet Low Tide
Fri -- 10:26 AM EST Moonset
Fri -- 03:40 PM EST 2.61 feet High Tide
Fri -- 06:01 PM EST Sunset
Fri -- 08:32 PM EST Last Quarter
Fri -- 11:55 PM EST 0.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
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 | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
0.4 | 1 | 1.5 | 1.7 | 1.5 | 1.2 | 0.8 | 0.3 | -0.1 | -0.3 | -0.4 | -0.2 | 0.4 | 1.2 | 2 | 2.5 | 2.6 | 2.4 | 2.1 | 1.7 | 1.2 | 0.9 | 0.5 | 0.3 |
Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland (2)
EDIT (on/off)  Help One Week of DataHavre de Grace
Click for Map
Fri -- 12:31 AM EST Moonrise
Fri -- 02:00 AM EST 1.40 feet High Tide
Fri -- 06:30 AM EST Sunrise
Fri -- 08:29 AM EST -0.33 feet Low Tide
Fri -- 10:26 AM EST Moonset
Fri -- 02:47 PM EST 2.18 feet High Tide
Fri -- 06:01 PM EST Sunset
Fri -- 08:32 PM EST Last Quarter
Fri -- 10:27 PM EST 0.16 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:31 AM EST Moonrise
Fri -- 02:00 AM EST 1.40 feet High Tide
Fri -- 06:30 AM EST Sunrise
Fri -- 08:29 AM EST -0.33 feet Low Tide
Fri -- 10:26 AM EST Moonset
Fri -- 02:47 PM EST 2.18 feet High Tide
Fri -- 06:01 PM EST Sunset
Fri -- 08:32 PM EST Last Quarter
Fri -- 10:27 PM EST 0.16 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
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 | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
0.9 | 1.2 | 1.4 | 1.3 | 1 | 0.6 | 0.2 | -0.1 | -0.3 | -0.3 | -0 | 0.5 | 1.1 | 1.7 | 2.1 | 2.2 | 2 | 1.7 | 1.4 | 1 | 0.6 | 0.3 | 0.2 | 0.2 |
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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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