Sunrise 5:25 AM   Sunset 7:49 PM Moonrise 6:06 AM   Moonset 10:11 PM

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ANZ232 Nantucket Sound- 406 Am Edt Thu May 9 2024
Today - NW winds around 10 kt, becoming N this afternoon. Seas around 2 ft. Wave detail: N 2 ft at 3 seconds and S 1 foot at 6 seconds. Patchy fog this morning with vsby 1 nm or less. Tonight - NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave detail: ne 2 ft at 3 seconds and W 1 foot at 5 seconds. Fri - NE winds 15 to 20 kt. Seas 2 to 3 ft. Wave detail: ne 3 ft at 4 seconds and S 1 foot at 7 seconds. A chance of showers in the morning. Fri night - NE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft. Wave detail: ne 2 ft at 4 seconds and S 1 foot at 7 seconds. A chance of showers after midnight. Sat and Sat night - NE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave detail: ne 2 ft at 4 seconds and S 1 foot at 8 seconds. Sun through Mon night - SW winds 10 to 15 kt. Seas around 2 ft. Wave detail: sw 2 ft at 3 seconds and ne 2 ft at 6 seconds.
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 406 Am Edt Thu May 9 2024
Synopsis for massachusetts and rhode island coastal waters - Low pressure system passes well offshore to the southeast. This could bring some light rain to the southern waters late today into tonight. Light rain showers linger into Friday with drying conditions into the weekend and early next week.

FXUS61 KBOX 090811 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 411 AM EDT Thu May 9 2024

SYNOPSIS
High pressure to the north will bring mainly dry and mild conditions today. Some showers are possible tonight into early Friday as low pressure tracks to the south, otherwise drier and cooler for much of Friday as NE winds develop. Cooler than normal this weekend with rain chances increasing Saturday night and Sunday, then milder temperatures return early next week but an unsettled weather pattern will continue.

NEAR TERM /UNTIL 6 PM THIS EVENING/
Weak shortwave ridging develops today between departing shortwave to the east and upstream shortwave across Gt Lakes. Somewhat drier air in the column will be present today which will yield mainly dry conditions, although moisture will begin to increase from the south later today as low pres moves to mid Atlc region. This increase in moisture will lead to low risk for a few showers late today near the south coast, otherwise mainly dry.

Fog and stratus in eastern MA should erode by daybreak with a brief period of partial sunshine this morning before clouds return. Highs should reach mid-upper 60s and near 70 Hartford to Springfield, but cooler across east coastal MA as winds turn NE. In fact, expect temps falling through the 50s during the afternoon along the eastern MA coast.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/
Tonight...

As mid level trough amplifies over the Gt Lakes, backing flow aloft will bring increasing moisture northward into SNE. However, there is uncertainty regarding how far north and east showers will get across SNE as best moisture will remain to the SW. Best chance for a period of rain tonight will be from western MA to RI closest to best moisture, with decreasing probs further NE into portions of eastern and NE MA.

Lows will be in the 40s tonight, with increasing NE winds along the south coast and Cape/Islands as low pres moves off the mid Atlc coast.

Friday...

Some lingering showers are possible Fri, especially across SW portions of SNE, but drier air will gradually move in from the north during the day as high pres builds south into eastern New Eng. This may lead to partial sunshine developing across portions of northern and eastern MA. NE flow will result in cooler temps Fri with highs mostly in the 50s, with some lower 60s possible in the CT valley.

LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/
Key Points...

* Trending drier this weekend with some sun possible

* Below average temperatures continue through the weekend

* More seasonable temps return next week

Weekend

Shortwave trough passes to the south of the region, as the associated surface low passes well offshore to the east. Another weaker shortwave follows quickly behind leaving the region in cyclonic flow for much of the weekend. With the best moisture and forcing to the south with the leading shortwave, models have trended drier with even some breaks in cloud cover possible. High temps over the weekend have also trended slightly warmer with the possibility for breaks of sun, however, onshore flow and 850mb temps below 0C will likely keep high temps below 60F in the east, and below 65F in the west. Overnight lows also stay on the cool side with the cool airmass in place staying in the low to mid 40s.

Next week

The pesky upper level low and mid level cold pool finally moves east as a upper level ridge builds in. Surface flow turns SSW with WAA bringing 850mb temps back above 0C to even +10C by mid week. High temps begin to moderate back into the low to mid 70s. As for rain chances, high pressure to the south should keep things dry early in the week. Rain chances look to increase again mid to late week as a shortwave approaches the region, but uncertainty remains high at this time.

AVIATION /08Z THURSDAY THROUGH MONDAY/
Forecast Confidence Levels:

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

Through 12z...

IFR-LIFR stratus and fog across eastern MA will gradually erode and improve to MVFR-VFR by 12z, but IFR may persist across Cape/Islands.

Today...Moderate confidence.

Mainly VFR cigs, but areas of MVFR cigs across east coastal MA.
N wind around 10 kt turning NE during the afternoon.

Tonight...Moderate confidence.

MVFR cigs expanding westward across SNE. Low prob for IFR.
Scattered showers developing, especially across western half New Eng. NE wind 5-15 kt.

Friday...Moderate confidence.

Cigs improving to VFR from NE to SW as drier air works in from the N. A few showers possible, mainly from SW MA and CT to the south coast.

KBOS TAF...Moderate confidence in TAF. IFR-LIFR stratus and fog has improved to VFR but cigs may briefly drop down to IFR before daybreak. Some uncertainty with cigs today which may vary between VFR and MVFR but no vsby restrictions. NW winds will become NE this afternoon.

KBDL TAF...High confidence in TAF today. VFR through today, then cigs may lower to MVFR tonight. Scattered showers possible tonight.

Outlook /Friday Night through Monday/...

Friday Night: Mainly VFR, with local MVFR possible. Slight chance SHRA.

Saturday: Mainly VFR, with local MVFR possible.

Saturday Night: Mainly VFR, with local MVFR possible. Slight chance SHRA.

Sunday: Mainly VFR, with areas MVFR possible. Slight chance SHRA.

Sunday Night: Mainly VFR, with local MVFR possible.

Monday: VFR.

MARINE
Forecaster Confidence Levels:

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

Through Friday...

North winds will become NE this afternoon with speeds below 20 kt, but may increase with gusts 20-25 kt tonight into Fri, especially over south coastal waters as low pres tracks to the south. Seas build to near 5 ft over the eastern outer waters late tonight and Fri. A SCA may be needed for eastern MA waters but confidence not high enough to issue as conditions look marginal.

Outlook /Friday Night through Monday/...

Friday Night through Saturday: Winds less than 25 kt. Seas up to 5 ft. Slight chance of rain showers.

Saturday Night through Sunday: Winds less than 25 kt. Areas of seas approaching 5 ft.

Sunday Night through Monday: Winds less than 25 kt. Seas locally approaching 5 ft.

TIDES/COASTAL FLOODING
High astronomical tides coupled with onshore flow may result in some splashover/very minor coastal flooding during the overnight high tide cycle tonight. However, wind/waves do not appear high enough to result in a significant issue. The daytime high tides are lower and do not pose a threat for coastal flooding.

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

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South Yarmouth
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Thu -- 02:07 AM EDT     3.60 feet High Tide
Thu -- 05:26 AM EDT     Sunrise
Thu -- 06:05 AM EDT     Moonrise
Thu -- 08:30 AM EDT     -0.57 feet Low Tide
Thu -- 02:46 PM EDT     3.11 feet High Tide
Thu -- 07:47 PM EDT     Sunset
Thu -- 08:41 PM EDT     -0.12 feet Low Tide
Thu -- 10:10 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION

South Yarmouth, Bass River, Nantucket Sound, Massachusetts, Tide feet

Pollock Rip Channel
Click for Map
Thu -- 01:19 AM EDT     -2.01 knots Max Ebb
Thu -- 04:26 AM EDT     0.00 knots Slack
Thu -- 05:26 AM EDT     Sunrise
Thu -- 06:05 AM EDT     Moonrise
Thu -- 07:54 AM EDT     2.35 knots Max Flood
Thu -- 11:06 AM EDT     -0.00 knots Slack
Thu -- 01:51 PM EDT     -1.90 knots Max Ebb
Thu -- 04:58 PM EDT     0.00 knots Slack
Thu -- 07:46 PM EDT     Sunset
Thu -- 08:15 PM EDT     2.00 knots Max Flood
Thu -- 10:09 PM EDT     Moonset
Thu -- 11:17 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Pollock Rip Channel, Massachusetts Current, knots

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