Sunrise 5:07 AM   Sunset 8:16 PM Moonrise 2:13 AM   Moonset 2:46 PM

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ANZ230 Boston Harbor- 1004 Pm Edt Sat Jun 1 2024
Overnight - SE winds 10 to 15 kt. Gusts up to 20 kt. Waves around 2 ft. Sun - S winds around 5 kt, becoming se in the afternoon. Waves 1 foot or less. Sun night - S winds around 5 kt, becoming W after midnight. Waves 1 foot or less. Mon - N winds around 5 kt, becoming E in the afternoon. Waves 1 foot or less. Mon night and Tue - E winds 5 to 10 kt. Waves 1 foot or less. Tue night - SE winds 5 to 10 kt, becoming sw after midnight. Waves 1 foot or less. Wed and Wed night - S winds 5 to 10 kt. Waves around 2 ft. Thu - S winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. A chance of showers. Thu night - S winds 10 to 15 kt with gusts up to 20 kt. Waves around 2 ft. Showers likely.
seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.

ANZ200 1004 Pm Edt Sat Jun 1 2024
Synopsis for massachusetts and rhode island coastal waters - High pressure continue to remain in control tonight and tomorrow. Winds tonight could get a bit gusty up to 20 knots after Sunset through Sunrise tomorrow. High pressure looks to remain in control through mid week with the next chance for rain at the end of next week.

FXUS61 KBOX 012359 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 759 PM EDT Sat Jun 1 2024

SYNOPSIS
High pressure continues to move east tonight and tomorrow over New England keep the region dry. Low chance for showers Sunday night with a weak low passing over the region. High pressure brings warm and dry weather through the middle of next week, then the weather pattern becomes unsettled toward the end of the week as a frontal system approaches from the west.

NEAR TERM /UNTIL 7 AM SUNDAY MORNING/
751 PM Update:

Nice early summer evening underway across Southern New England with high pressure in control. Radar and obs show the RI/MA South Coast sea breeze has made it quite a ways inland although that should wash itself out shortly.

With clear skies and light winds, temps should fall pretty quickly after sundown with good radiational cooling expected.
Some of the NAM-based models indicate patchy radiation fog in the outlying valleys that are more prone to fog formation, but it's been dry and hasn't rained recently. Vast majority of locations are not expected to see fog; if any patches develop, it would be towards sunrise in NW MA, the CT River Valley and in/around I-495 in MA and also be rather brief. Lows were left unchanged as they seem on track.

Previous discussion:

June 1st, marks the official start to the North Atlantic Hurricane Season. Should go without saying it's only a matter of when, not if, a hurricane makes landfall along our coastline.
While there have had numerous topical storms, August of 1991 brought Hurricane Bob, the last landfalling hurricane in southern New England. Take time today, this weekend, or this month to review whether or not you reside in an evacuation zone and what items you can buy right now to build out your emergency kit. Because, let's be honest, waiting to last minute will feel as you are out shopping/fighting the crowds on Black Friday, minus the deals/savings. For details on how to prepare for this hurricane season please visit this link: noaa.gov/hurricane-prep

Upper level ridge, rising heights, and subsidence aloft has lead to an absolutely gorgeous day with little to no clouds in the sky. This trend of no clouds will continue into tonight which will allow for good radiational cooling. With dew points only in the 30s and 40s across the region, overnight lows will drop into the low 50s region wide, with our typical radiators in the mid to upper 40s. There is a low chance that patchy radiation fog forms overnight in eastern Massachusetts, however, low dewpoints and early sunrises should keep it from becoming more widespread.

SHORT TERM /7 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/
Ridge axis shifts east tomorrow allowing for high clouds to filter in ahead of a weak shortwave trough. Shouldn't have a huge effect on high temperatures tomorrow still expected to reach the low 80s inland and low 70s along the coasts. Light SSW winds tomorrow with Localized sea breezes developing again in the late morning/early afternoon.

The weak shortwave moves through Sunday night. This could allow for some weak rain showers overnight mainly across western MA and CT.
Not expecting a soaking rain with weak forcing and dry low levels.
Temps overnight stay in the upper 50s to low 60s with mostly cloudy skies.

LONG TERM /MONDAY THROUGH SATURDAY/
Highlights:

* Tranquil and dry weather Mon thru Wed with mild temps inland, cooler near the coast.

* Increasing threat of rain/t-storms late in the week and early weekend - timing still a bit unclear.

Details:

Overall tranquil weather conditions through at least Wed looks to be on tap for Southern New England based on the 12z global ensembles.
High pressure over the Gulf of Maine looks to bring a couple days of onshore flow near the coast for Mon and Tue, perhaps with scattered low clouds near the immediate coast. Full sun inland with temps being considerably warmer (e.g. lower to mid 80s inland, vs upper 60s/lower 70s coastal areas). 500 mb heights then start to rise Tue into Wed with SWly flow developing at sfc, favoring more widespread upper 70s to lower 80s.

Pattern change toward more unsettled weather then develops around Thurs into late week/early weekend. 500 mb ridging weakens and shifts eastward, to be replaced by pretty strong 500 mb height falls associated with an anomalous closed upper low located over the Gt Lakes region as we move into Fri which stays more or less in place into Sat. A frontal system is expected to move across Southern New England, and while the exact timing is still a bit unclear and sensitive to how quickly the 500 mb ridge breaks down, felt NBM PoPs into the solid Chance range Wed night through the first part of Thurs were a bit too aggressive given the rather amplified pattern.
Reduced these favoring a drier Thurs, although PoPs then increase more significantly into Thurs night into Fri following loose consensus in the individual global models. Thus late in the week looks to be our next chance for showers or t-storms, and while 925- 850 mb temps favor warmer temps than indicated, more cloud cover around should keep highs in the 70s although with a bit of an uptick in humidity level.

AVIATION /00Z SUNDAY THROUGH THURSDAY/
Forecast Confidence Levels:

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

Rest of Today... High confidence.

VFR and dry. NNW winds less than 10 knots with seabreezes along the coast.

Tonight: High confidence.

VFR. Indicated a TEMPO for IFR patchy mist toward pre- dawn hrs at BED toward early morning but would be short-lived. Winds becoming light, although period of E/ESE winds develops later tonight for the eastern MA coastal areas with speeds around 6-10 kt.

Sunday and Sunday Night: High confidence.

VFR and dry. WSW to SW winds less than 10 knots will give way to afternoon seabreezes along the coast. For the evening, will see increased cloud cover over western terminals but still in the VFR range.

KBOS TAF...High confidence in TAF. VFR. NW winds around 10 kt should shift to E/ESE with speeds around 10 kt around 02z with period of onshore flow, which become light southerly around daybreak. Sea breezes again develop Sunday around 14-16z.

KBDL TAF... High confidence in TAF. VFR with light/variable winds tonight. Winds become light southerly around daybreak, speeds under 5 kt which then shift to SW around 4-7 kt early Sunday afternoon.

Outlook /Monday through Thursday/...

Monday through Wednesday: VFR.

Wednesday Night: VFR. Slight chance SHRA.

Thursday: Mainly VFR, with local MVFR possible. Breezy. Chance SHRA.

MARINE
Forecaster Confidence Levels:

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

Tonight through Sunday night... High confidence.

Winds turn ESE this evening and become gusty up to 20 knots through about sunrise tomorrow. Otherwise tomorrow is shaping up to be another nice day with light southerly winds and filtered sunshine with high clouds. Seas remain 1-2 feet for the entire period.

Outlook /Monday through Thursday/...

Monday through Wednesday Night: Winds less than 25 kt.

Thursday: Winds less than 25 kt. Chance of rain showers.

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

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Charlestown Bridge
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Sat -- 12:56 AM EDT     0.74 feet Low Tide
Sat -- 02:13 AM EDT     Moonrise
Sat -- 05:09 AM EDT     Sunrise
Sat -- 07:06 AM EDT     9.88 feet High Tide
Sat -- 01:23 PM EDT     0.17 feet Low Tide
Sat -- 02:46 PM EDT     Moonset
Sat -- 07:42 PM EDT     10.34 feet High Tide
Sat -- 08:15 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Charlestown Bridge, Charles River, Massachusetts, Tide feet

Boston Harbor
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Sat -- 12:55 AM EDT     0.00 knots Slack
Sat -- 02:12 AM EDT     Moonrise
Sat -- 03:18 AM EDT     1.04 knots Max Flood
Sat -- 05:09 AM EDT     Sunrise
Sat -- 06:38 AM EDT     -0.00 knots Slack
Sat -- 10:42 AM EDT     -1.05 knots Max Ebb
Sat -- 01:20 PM EDT     0.00 knots Slack
Sat -- 02:45 PM EDT     Moonset
Sat -- 04:09 PM EDT     1.13 knots Max Flood
Sat -- 07:14 PM EDT     -0.00 knots Slack
Sat -- 08:14 PM EDT     Sunset
Sat -- 11:29 PM EDT     -1.12 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION

Boston Harbor, Massachusetts Current, knots

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