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Marine Weather and Tides Somerville, MA Version 3.4

NOTICE 12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed. 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.

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Sunrise 7:00AM

Sunset 4:53PM

Tuesday January 28, 2020 11:31 PM EST (04:31 UTC)

Moonrise 10:16AM

Moonset 9:38PM

Illumination 17%

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.

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7 Day Forecast for Marine Location Near Somerville, MA

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Area Discussion for - Boston, MA

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FXUS61 KBOX 290316 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 1016 PM EST Tue Jan 28 2020

SYNOPSIS.

Skies will remain cloudy through much of tonight. With cold northerly winds, scattered ocean effect rain showers will pass across the mid and outer Cape to Nantucket. As temperatures fall tonight, the rain will change over to light snow showers with some light accumulations possible into early Wednesday morning before tapering off. Dry, quiet conditions with near normal temperatures are expected for the remainder of Wednesday and into Thursday. This high moves offshore Friday with temperatures moderating. Still watching a potential coastal storm which may impact our region Saturday/Sat night. Dry, blustery and colder weather likely follows Sunday into Monday.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/.

10 PM Update .

Slowed down the decrease in cloud cover overnight. Have bumped up low temperatures a few degrees to reflect the higher cloud cover. Decreased ocean effect chances across Cape Cod toward the NMM as it is performing well based on radar over the past few hours.

7 PM Update .

No major changes to the forecast this evening. Ocean-effect showers continued to remain just offshore this evening. Minor tweaks to sky condition and temperatures to reflect observed trends.

Previous Discussion .

The majority of the model suite, especially the high res short range models, have continued to signal the ocean effect band to become better organized this evening E of Cape Cod, then shift southwestward through around midnight or so. The rain early this evening will change over to snow showers as temps fall back to the lower 30s.

The best chance for any light snow accumulations will occur across the outer arm of the Cape, but not expecting much more than an inch in isolated spots, if that. Possible to see a dusting of snow as far W as Hyannis. Also noting some possible snow showers developing across the E slopes of the Berkshires as another weak mid level short wave moves across. Should see any precip taper off after 06Z- 08Z, though might linger across the outer Cape until around daybreak.

Across the remainder of the interior, where dry conditions are expected, skies will begin to clear after midnight. Northerly winds will continue to 5-10 mph.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/.

Wednesday and Wednesday night .

Clouds across east coastal areas will shift SE as high pressure slowly builds out of southern Ontario to central Quebec during Wednesday. Overall, expect a mostly sunny day. Expect high temps to be close to seasonal levels for late January, mainly from 30 to 35 across the higher terrain to the upper 30s to near 40 across the coastal plain. It will feel chilly, though, as north winds at 10-15 kt will bring wind chill values down to the 20s.

The high will remain across Quebec Wednesday night, but any leftover pressure gradient will relax. So, expect mainly clear skies across most areas with light northerly winds. Some clouds may linger across SE Mass as well as Cape Cod and the islands. It will be a cold night, however, with temperatures bottoming out in the single digits to the mid teens inland, ranging to the upper teens to mid 20s along the shoreline. These readings will run up to 5 degrees below seasonal normals inland.

LONG TERM /THURSDAY THROUGH TUESDAY/.

Highlights .

* Mainly dry Thu into Fri with near to slightly below normal temperatures rebounding above normal by Fri

* Still monitoring for a potential storm Saturday/Sat night, but forecast confidence remains very low on details

* Mainly dry with above normal temperatures early next week

Details .

Large high pressure late this week should lead to dry weather. Near to below normal temperatures expected Thursday, until this high pressure passes by our region into Friday. Then temperatures are once again expected to be above normal.

Still monitoring the potential for a coastal storm sometime this weekend. The energy expected to be a part of this system should move over western North America tonight into tomorrow. Expecting most of the details to emerge from the noise over the next couple of days. There remains a large degree of spread in the ensemble solutions, so it is important to not lock in on a singular operational model run at this time.

The general idea from the 28/12Z guidance is for a low pressure to move northeast along the eastern Seaboard Saturday into Sunday. Still some question as to how close this low pressure tracks to southern New England, as well as when does it strengthen. The consensus solution is for a farther offshore track, with the strengthening occurring after this low passes us by. Only the operational GFS significantly deepened the low pressure closer to our region.

At this point, will continue to mention a broad period with a chance of rain and/or snow. Expecting changes with the details in later forecasts. This remains a low confidence portion of the forecast.

A drying trend should follow Sunday into early next week behind this departing cyclone. Thinking above normal temperatures for this portion of the forecast.

AVIATION /03Z WEDNESDAY THROUGH SUNDAY/.

Forecaster Confidence Levels .

Low - less than 30 percent. Moderate - 30 to 60 percent. High - greater than 60 percent.

Tonight .

VFR across most locations. MVFR CIGS develop across the eastern slopes of the Berkshires and across central and eastern Cape Cod as well as Nantucket. Best chance for MVFR CIGS and local MVFR VSBYS is across Cape Cod and Nantucket where scattered ocean effect rain and/or snow showers may fall.

Wednesday .

Any isolated snow showers across outer Cape Cod early will end with local MVFR CIGS/VSBYS through 13Z-14Z. Otherwise, expect VFR conditions. N-NW winds 10-15 kt, highest along E coastal terminals.

Wednesday night .

VFR conditions. Light N winds. Good visibility.

KBOS Terminal . High confidence in TAF through 00Z, then moderate confidence as MVFR ceilings move in across the mid and outer sections of Cape Cod into Nantucket and develop across N central/W Mass tonight.

KBDL Terminal . High confidence in TAF.

Outlook /Thursday through Sunday/ .

Thursday through Friday: VFR.

Friday Night: VFR. Slight chance SN.

Saturday: Mainly VFR, with local MVFR possible. Breezy. Chance RA, with a slight chance SN.

Saturday Night: Mainly VFR, with local MVFR possible. Breezy. Chance SN or RA.

Sunday: VFR. Breezy. Chance SN, with a slight chance RA.

MARINE.

Short Term /through Wednesday Night/ . High confidence.

Tonight . Winds becoming N 10 to 15 kt. Seas 3 to 4 ft. Scattered rain/snow showers across the eastern waters from east of Boston Harbor to near and east of Cape Cod and Nantucket. Visibility of 1 to 3 miles in precipitation. Good visibility elsewhere.

Wednesday . NW winds 10 to 15 kt gusts increasing to 15 to 20 kt during the afternoon. Seas 3 to 4 ft, approaching 5 ft across the eastern waters. Good visibility.

Wednesday night . N winds 10 to 15 kt. Gusts up to 20 kt and seas building up to 5 to 6 ft on the eastern outer waters. Good visibility.

Outlook /Thursday through Sunday/ .

Thursday: Winds less than 25 kt. Local rough seas.

Thursday Night: Winds less than 25 kt. Seas locally approaching 5 ft.

Friday: Winds less than 25 kt.

Friday Night: Winds less than 25 kt. Chance of rain or snow.

Saturday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Chance of rain.

Saturday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Local rough seas. Chance of rain, with a slight chance of snow.

Sunday: Winds less than 25 kt. Areas of rough seas. Chance of rain, with a slight chance of snow.

BOX WATCHES/WARNINGS/ADVISORIES. CT . None. MA . None. RI . None. MARINE . None.

SYNOPSIS . Belk/EVT NEAR TERM . Belk/BL SHORT TERM . EVT LONG TERM . Belk AVIATION . Belk/BL MARINE . Belk/BL

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
BHBM3 - 8443970 - Boston, MA	1 mi	43 min		34°F	37°F		1010.3 hPa
44013 - BOSTON 16 NM East of Boston, MA	22 mi	41 min	NNW 19 G 23	35°F	42°F	4 ft	1010.1 hPa (+1.0)	24°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen	29 mi	87 min	N 18 G 19	34°F	41°F	3 ft	1008.9 hPa
FOXR1 - 8454000 - Providence, RI	43 mi	43 min		35°F	39°F		1011.4 hPa
PVDR1	44 mi	43 min					1011.6 hPa
BLTM3 - 8447387 - Borden Flats Light at Fall River, MA	46 mi	43 min		36°F			1011.3 hPa
FRVM3 - 8447386 - Fall River, MA	46 mi	49 min		36°F	40°F		1011.4 hPa
CPTR1 - 8452944 - Conimicut Light, RI	47 mi	49 min		35°F	40°F
FRXM3	47 mi	49 min		36°F				23°F
IOSN3 - Isle of Shoals, NH	48 mi	31 min	NNW 12 G 14	32°F			1010.9 hPa (+1.7)	22°F
BGXN3 - Great Bay Reserve, NH	49 mi	106 min	Calm	32°F			1011 hPa	21°F

Wind History for Providence, RI

(wind in knots)    EDIT      (on/off)   Help

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NW6 G9

NW9 G13

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NW5 G9

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NW6 G10

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N6 G13

N7 G10

N7 G11

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NE8 G12

N11 G15

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NW7 G16

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N12 G15

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NE3 G8

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W5 G8

W4 G7

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SW3 G6

W4 G8

W6 G9

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NW6 G13

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SW5 G8

SW3 G7

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W6 G11

NW9 G12

NW10 G13

NW12 G15

W5 G8

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NW9 G18

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W11 G14

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N8 G13

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NW4 G7

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W5 G8

W5 G10

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Boston, Logan International Airport, MA	2 mi	97 min	NW 14 G 21	10.00 mi	Overcast	36°F	19°F	50%	1011 hPa
East Milton, MA	11 mi	1.7 hrs	NW 10 G 17	mi		31°F	19°F	64%	1011.2 hPa
Norwood, Norwood Memorial Airport, MA	14 mi	98 min	WNW 13	10.00 mi	Overcast	37°F	19°F	50%	1011.1 hPa
Laurence G Hanscom Field Airport, MA	14 mi	1.7 hrs	NNW 8	10.00 mi	Overcast	33°F	18°F	54%	1012.6 hPa
Beverly, Beverly Municipal Airport, MA	17 mi	98 min	NW 9	10.00 mi	Overcast	33°F	19°F	58%	1010.6 hPa

Link to 5 minute data for KBOS

Wind History from BOS (wind in knots)

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NW14 G17

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NW13 G20

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W11 G20

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W10 G16

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2 days ago

S9

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W12 G18

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W16 G21

W17 G23

W19 G26

W15 G20

W12 G21

W12 G20

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Tide / Current Tables for Charlestown Bridge, Charles River, Massachusetts

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Tide / Current Tables for Boston Harbor, Massachusetts Current

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Weather Map

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GEOS Local Image of    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

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Wind Forecast for Boston, MA (23,6,7,8)

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Ground Weather Radar Station Boston, MA

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