Sunrise 5:30 AM   Sunset 7:49 PM Moonrise 3:46 AM   Moonset 3:44 PM

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ANZ154 Coastal Waters From Cape Elizabeth, Me To Merrimack River, Ma Out 25 Nm- 642 Am Edt Sat May 4 2024
Today - E winds 5 to 10 kt. Seas 2 to 3 ft. Wave detail: E 2 ft at 5 seconds. Tonight - E winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. Wave detail: E 2 ft at 6 seconds. Patchy fog after midnight with vsby 1 to 3 nm. Sun - SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. Wave detail: se 2 ft at 3 seconds and E 2 ft at 6 seconds. A chance of rain in the afternoon. Sun night - S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave detail: S 3 ft at 4 seconds and E 2 ft at 8 seconds. Rain.Mon - SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave detail: S 3 ft at 4 seconds and E 3 ft at 10 seconds. A chance of showers in the morning. Mon night - SW winds around 10 kt, becoming nw after midnight. Seas around 3 ft. Wave detail: se 3 ft at 10 seconds. Tue - N winds 5 to 10 kt, becoming S in the afternoon. Seas 2 to 3 ft. Tue night - SW winds 5 to 10 kt, becoming ne after midnight. Seas 2 to 3 ft. Wed - E winds around 10 kt with gusts up to 20 kt. Seas 2 to 3 ft. A chance of showers. Wed night - E winds around 10 kt. Seas 2 to 3 ft. A chance of showers.

ANZ100 642 Am Edt Sat May 4 2024
Synopsis for stonington me to merrimack river ma out to 25 nm high pressure builds south through maritime canada and into the gulf of maine this weekend with increasing southeasterly flow today into Sunday this flow regime may introduce fog on Saturday and Sunday nights, while an approaching cold front will bring increasing chances for rain. Rain is most likely late Sunday into early Monday, with a cold front introducing fresh southwesterly to westerly flow later in the day Monday. Flow becomes more variable toward midweek with a weak and fluctuating pressure gradient.

FXUS61 KGYX 041048 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 648 AM EDT Sat May 4 2024

SYNOPSIS
High pressure near the coast will provide dry conditions through today, with increasing onshore flow and humidity. Thickening clouds, cooler temperatures, and rain showers are expected by Sunday as a frontal system approaches New England. Clearing is likely not coming until Monday behind a cold front. Warmer and sunnier conditions are expected into Tuesday, then more unsettled weather returns around the middle of next week.

NEAR TERM /TONIGHT/
648 AM Update...Quick tune up of sky coverage this morning, along with temperature trends through the dawn hours. Little change otherwise.

Previously...
An upper level ridge moves toward the East Coast while surface high pressure centered near Labrador this morning builds south into the Gulf of Maine today... resulting in another fair weather day, albeit with increasing onshore flow and associated clouds. Signs of increasing low- and mid- level moisture associated with this trend are evident even this morning as patchy ground fog has developed in most places... and a mid- level stratus deck has built over portions of the foothills, where humid NE mid- level flow is dammed against the mountains.

The trend for today will be to mix out low clouds and fog initially... but build back some stratocu by the afternoon, mainly over the interior of Maine beneath mixed cirrus decks.
The ridge overhead will keep us dry, however it will be cooler than yesterday especially at the coast where temperatures may not or may just barely make it out of the 40s. The warmest and sunniest spots will likely be in the Connecticut and Lower Merrimack River Valleys, with highs in the mid-60s.

SHORT TERM /TONIGHT THROUGH SUNDAY NIGHT/
High pressure extending offshore of the Maritimes combined with an approaching cold front from the Great Lakes continues to support southeast flow off the Gulf of Maine... with low clouds filling into an overcast sky for most places tonight, except for the upper Connecticut River Valley which benefits from the Whites blocking humid onshore flow. Some fog and drizzle are likely to develop too, mainly in southern New Hampshire into southwest Maine where low- level humidity will be at its highest.

One of the bigger questions for Sunday will be how efficiently we'll be able to mix out low stratus, if at all, before a pre- frontal trough brings a moisture axis and associated rainfall across the region. Model trends have been fairly steady with this wave delivering about 0.2-0.4" for most places... locally higher, lower elsewhere... Sunday afternoon and overnight. While ceilings are forecast to lift a bit during the day, hires guidance coming into view suggests a fair amount of overcast to persist. Thus between clouds and onshore flow, temperatures will be limited to the low- or mid-50s... or 40s, nearby to the coast and if ceilings remain low. A building southeasterly breeze will make conditions feel a bit more raw as well.

Rain will exit east Sunday night with drier air pushing in aloft, however at the surface conditions will remain humid with fog and low ceilings likely. Winds will gradually pull more southerly and southwesterly, which will at least cut some of the maritime influence down by Monday.

LONG TERM /MONDAY THROUGH FRIDAY/
Overview: Unsettled weather expected until a cold front passes Monday morning. High pressure and warm temperatures arrive the latter part of Monday, continuing into Tuesday. Additional unsettled weather is expected mid to late week as broad low pressure moves into the eastern Great Lakes.

Details:Perhaps some remaining drizzle along the coast early Monday morning, but drying across the CWA should be underway by mid morning. NW breeze will also kick up to enhance drying through the afternoon. Should this stay on track, temperatures will be in for a rebound later in the day with highs in the 70s possible for southern NH and into southern Maine's interior.
Tuesday follows up as warm and dry, before another period of unsettled weather for mid to late week. Current NBM PoPs are likely overdone due to the wide spread of guidance solutions, and have tried to emphasize this uncertainty by keeping just a chance of rain to close out the week.

AVIATION /12Z SATURDAY THROUGH WEDNESDAY/
Short Term...Spotty/low confidence IFR/LIFR in FG possible this morning... clearing to VFR today with increasing light SE or E flow. Brief MVFR decks possible for interior ME (AUG) this afternoon. Widespread restrictions expected to develop tonight... with MVFR/IFR VSBY, CIGs except at KHIE which likely remains VFR. Some improvement possible on Sun, however increasing RA chances bring restrictions again during afternoon/evening. Low CIGs , possibly low VSBY persist at least along the coast into early Mon.

Long Term...Ceilings should improve to VFR at all terminals into Monday afternoon through Tuesday. Unsettled weather likely brings more restrictions from mid-week, onward.

MARINE
Short Term...NE flow 10-20 kts today turns SE by early Sunday with increasing potential for fog, then rain later in the day and overnight into early Monday. A few gusts near 25 kts are possible, with waves 3-5 ft, though conditions will remain predominantly below SCA thresholds.

Long Term...The cold front will pass over the waters Monday morning, bringing better vis conditions through Tuesday.
Conditions should remain below SCA criteria with the frontal passage through at least Wednesday.

GYX WATCHES/WARNINGS/ADVISORIES
ME...None.
NH...None.
MARINE...None.

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Atlantic Heights
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Sat -- 02:29 AM EDT     0.47 feet Low Tide
Sat -- 03:46 AM EDT     Moonrise
Sat -- 05:31 AM EDT     Sunrise
Sat -- 08:52 AM EDT     7.97 feet High Tide
Sat -- 02:59 PM EDT     -0.02 feet Low Tide
Sat -- 03:43 PM EDT     Moonset
Sat -- 07:48 PM EDT     Sunset
Sat -- 09:27 PM EDT     8.20 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Atlantic Heights, Piscataqua River, New Hampshire, Tide feet

Portsmouth Harbor Entrance
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Sat -- 12:31 AM EDT     -1.78 knots Max Ebb
Sat -- 03:46 AM EDT     Moonrise
Sat -- 04:21 AM EDT     0.00 knots Slack
Sat -- 05:31 AM EDT     Sunrise
Sat -- 06:21 AM EDT     1.15 knots Max Flood
Sat -- 09:56 AM EDT     -0.00 knots Slack
Sat -- 12:55 PM EDT     -2.00 knots Max Ebb
Sat -- 03:43 PM EDT     Moonset
Sat -- 04:44 PM EDT     0.00 knots Slack
Sat -- 06:54 PM EDT     1.38 knots Max Flood
Sat -- 07:47 PM EDT     Sunset
Sat -- 10:40 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Portsmouth Harbor Entrance, New Hampshire Current, knots

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