Saturday, April10, 2021
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Marine Weather and Tides
Storrs, CT

Version 3.4
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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 6:14AMSunset 7:25PM Saturday April 10, 2021 7:02 AM EDT (11:02 UTC) Moonrise 6:02AMMoonset 6:04PM Illumination 3% Phase: Waning Crescent; Moon at 28 days in cycle
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.
Marine Forecasts
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ANZ330 Long Island Sound East Of New Haven Ct/port Jefferson Ny- 600 Am Edt Tue Mar 30 2021
Today..E winds around 5 kt, becoming S late this morning and afternoon. Seas 1 ft or less.
Tonight..S winds around 10 kt. Seas 1 to 2 ft.
Wed..S winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Chance of showers in the morning, then chance of rain in the afternoon.
Wed night..S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain. Vsby 1 to 3 nm.
Thu..W winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers.
Thu night..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft.
Fri..NW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat..W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sat night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
ANZ300 646 Am Edt Sat Apr 10 2021
Synopsis for the long island waters and new york harbor.. High pressure gradually shifts east farther out into the atlantic today as a weak warm front approaches the waters from the southwest. Another frontal system impacts the waters on Sunday, followed by unsettled weather through the middle of next week as broad low pressure lingers over the northeast.


7 Day Forecast for Marine Location Near Storrs, CT
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location: 41.85, -72.33     debug


Area Discussion for - Boston, MA
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FXUS61 KBOX 101045 AFDBOX

Area Forecast Discussion National Weather Service Boston/Norton MA 645 AM EDT Sat Apr 10 2021

SYNOPSIS. High pressure just offshore of Southern New England will allow for one last day of warm and dry conditions today. A backdoor cool front later tonight will spread overcast conditions and cooler onshore flow across the region tonight and into Sunday. Meanwhile, a frontal system passing to our west will also bring a period of light rain for the interior later Sunday into Sunday evening. Cooler afternoons are on tap for much of next week with onshore flow and considerable cloudiness at times.

NEAR TERM /UNTIL 6 PM THIS EVENING/.

645 AM Update .

Fog and stratus along the South Coast, a band of altocu moving through Eastern MA and generating a couple of sprinkles. For most places, it's fair weather.

The forecast will show a few adjustments to less sky cover. Otherwise no significant changes. Questions linger as to how far away from the coast that the sea breeze may reach around Boston and the North/South Shores. Also some question on how persistant the fog/stratus will be along the South Coast. But looking at fair weather for most areas today.

Previous Discussion .

Today will be the last day of above normal temperatures, before our weather pattern turns cooler and more unsettled. For most of CT, MA and northern/central RI, will see more of a mix of sun and clouds compared to prior days. However 850 mb temperatures running around +8 to +10C should support highs into the 70s, and well into the 70s across northern MA. SW winds should keep the eastern MA sea breeze just offshore and allow for the immediate coast to see highs well into the 60s to low 70s. The one potential concern is around early to mid-afternoon, where a progged relative weakness in the pressure field may be enough to allow for the sea breeze to penetrate just far enough inland to allow temps to cool off for a short period near the immediate eastern coast. The HRRR and the WRF ARW indicate the sea breeze potential the hardest. However even these models have winds flipping back to SW late in the day. If the sea breeze does make it just to the immediate east coast, what we could see for these areas such as Boston is temperatures rising early, then briefly decreasing due to the onshore flow, then rising to late- day highs as winds flip to SW again. Coolest temperatures expected near the South Coast and Cape Cod/Islands, where early- day cloudiness and more shallow mixing would support highs only in the 50s to lower 60s. SW breezes here may gust to the low 20s MPH.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SUNDAY/. Tonight:

High pressure continues to be in control. However lower clouds near the southern waters will again return back northward tonight. Unlike the last couple nights where stratus has been mainly confined to the South Coast, we should see these lower clouds expanded across most of if not all of Southern New England. Model soundings also suggest potential for areas of mist or fog accompanying the stratus. In addition, as a weak area of low pressure passes into the Gulf of Maine during the first part of the evening, winds will shift from SW to N/NE associated with a backdoor cool front. The extent of the onshore NE flow thru early Sunday morning should be mainly confined to central/eastern MA and parts of northern RI, which will bring about cooling temperatures and lower dewpoints despite the anticipated overcast. Lows ranging from the upper 40s to low 50s for these areas, while across most of RI, northern CT into western MA, we should see lows closer to the mid 50s.

Sunday:

Pretty notable pattern change compared to the last several days, as cooler onshore flow continues to expand southwestward. Forecast soundings show shallow moisture, cool advection and related thermodynamically stable profiles across most of Southern New England. Thus despite 850 mb temps around +9 to +11C, we simply won't mix to that level. Expect overcast lower clouds to linger through much of the day, with NE to E winds around 10 mph making it feel rather raw. In fact temperatures in eastern MA and RI probably will struggle to rise much if at all, with more modest warming across western MA and the CT Valley. For temperatures, have incorporated some of the raw model 2-m temperature guidance to reflect the non-diurnal trends.

Focus for the second half of Sunday will be the approach of a frontal occlusion from the Ohio Valley, Appalachians and mid- Atlantic region. A shield of rain should trail NW to SE and eventually overspread into our western zones by mid to late afternoon. The start timing of the rain is still somewhat uncertain. Model soundings show initially shallow moisture gradually saturating up to a greater depth. Until moisture profiles saturate up, rain should hold off. Most of eastern MA stands a better chance at rains into the evening, with best chance of steadier rains during the day mainly for western MA and northern CT.

Highs range from the upper 40s to lower 50s for eastern MA into the coastal plain, the mid 50s across central MA and RI, and upper 50s to low 60s for western MA and most of northern CT.

LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/. Big Picture .

The seven-day pattern shifts around a little, showing a series of closed lows across the Northern tier of the USA. This channels the main jet corridor across the Southern USA from Srn California to the Carolinas. That concentration of jet dynamics and west-to-east water vapor transport in the South will favor heavy rain across that area. New England won't be shut out, with low level east-northeast flow bringing some moisture into the area. But the pattern favors limited precipitation mostly concentrated on Monday and Friday as surface weather systems pass south of the region.

Contours at 500-mb, representing the deep layer thermal field, are near normal values in the 550s the first half of the week before trending to the 540s late week. Expect the interior to be near normal early next week, then trend cooler late week. With an east low level wind, expect Eastern MA and especially the shoreline to average below normal through the period.

Model mass fields show above average agreement on the overall pattern, but differ on details especially during the latter half of next week. Forecast confidence is moderate overall, but trends to low Thursday-Friday.

Details .

Sunday night and Monday .

Great Lakes upper low camped to our west Sunday night and Monday. Trough extends east from the upper low to western New England. Upper jet moving across the Southeast USA generates coastal surface low off the Mid-Atlantic coast Sunday night . this increases the east flow over Srn New England as it passes to the south Sunday night. The moist marine flow and increased lift will support showers over the region Sunday night and Monday morning, perhaps ending as some drizzle during Monday.

High pressure then builds south from Eastern Canada late Monday and Monday night. This should then generate sufficient subsidence for partial clearing, spreading from northeast to southwest.

Temperature fields support min temps upper 30s and low 40s Sunday and Monday nights. Shallow mixing will bring max sfc temps Monday in the 50s, but could be in the upper 40s along the East coast of Mass.

Tuesday through Friday .

Surface ridge from Canada will bring an onshore flow in Eastern MA, but also subsidence. Expect a mix of clouds and sun each day. Low level temp fields will support max values in the low 60s CT Valley. The onshore flow will mean cooler temps in the east, in the low to mid 50s.

Disorganized precip possible Tuesday and Wednesday in the form of widely scattered showers or drizzle. Great Lakes upper low sweeps southeast to the Mid Atlantic coast by Thursday, generating another coastal low that moves east out to sea on Friday. This could come close enough to bring more organizes showers to Srn New England later Thursday and Friday. Low confidence in this scenario.

AVIATION /12Z SATURDAY THROUGH WEDNESDAY/. Forecaster Confidence Levels.

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

Today: High confidence.

Sub-VFR conditions should dissipate and/or shift southward this morning, with most areas becoming VFR if they are not already there. IFR-LIFR conditions may linger at ACK into a good part of the day.

SW winds 6-11 kt, gusting to 18-20 kt for Cape Cod. Will note the potential for a sea breeze at BOS winds flipping to SE, but this isn't certain and if it does materialize (thinking between 17-20z), it may be short-lived.

Tonight: Moderate confidence.

Should see VFR early. Deteriorating flight categories then anticipated through the evening and overnight, to MVFR-LIFR conditions from advancing stratus and mist/fog. Confidence is lower on onset of degraded conditions, but expecting most areas are sub-VFR after 06z.

SW winds 5-9 kt early thru the first half of the night. Winds then begin to flip to NE/ENE 4-8 kt, strongest across eastern MA.

Sunday: High confidence in trends, moderate on timing.

MVFR to LIFR conditions from stratus and mist/fog, with intervals of drizzle in onshore flow. Band of MVFR-VFR visby rain approaches western/central airports into the mid to late afternoon from the southwest, though initially dry air renders confidence on rain start timing at moderate levels. East winds 8-12 kt, with occasional gusts to 18-20 kt.

KBOS TAF . Moderate confidence in TAF. SW winds should generally prevail today, but brief window for sea breeze development around 17-20z.

KBDL TAF . High confidence in TAF.

Outlook /Sunday Night through Wednesday/ .

Sunday Night: Mainly MVFR, with areas IFR possible. Breezy. Chance SHRA, patchy BR.

Monday: Mainly MVFR, with local IFR possible. Breezy. Chance SHRA.

Monday Night: Mainly VFR, with local MVFR possible. Breezy.

Tuesday: Mainly VFR, with local IFR possible.

Tuesday Night: MVFR/IFR conditions possible. Slight chance SHRA, patchy BR.

Wednesday: Mainly MVFR, with local IFR possible. Slight chance SHRA.

MARINE. High pressure to our south will produce SW winds in the 10 to 15 kt range with gusts on the southeastern waters up to 20 kt today. Seas in the 2-3 ft range.

For tonight, initial SW winds to become N/NE around 10-15 kt on the northern/eastern waters, and SE around 10 kt on the southern waters. Seas remain in the 2 to 3 ft range.

NE to E winds around 10-15 kt, gusts in the low 20s kt range will gradually overspread the rest of the waters into Sunday. Seas also building into the 2 to 4 ft range, though may near 5 ft on the southeastern offshore waters late in the day. SCAs could be needed for the late Sunday period due to seas, but somewhat better potential for SCA conditions appear to exist into Sunday evening.

Low clouds and areas of fog will continue across the southern waters today, expanding a bit in coverage into tonight across the remaining waters.

Outlook /Sunday Night through Wednesday/ .

Sunday Night: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Areas of seas approaching 5 ft. Chance of rain showers.

Monday: Low risk for Small Craft Advisory winds with gusts up to 25 kt. Seas up to 5 ft. Slight chance of rain showers.

Monday Night: Winds less than 25 kt. Seas up to 5 ft.

Tuesday: Winds less than 25 kt. Areas of seas approaching 5 ft.

Tuesday Night: Winds less than 25 kt. Areas of seas approaching 5 ft. Slight chance of rain showers.

Wednesday: Winds less than 25 kt. Seas up to 5 ft. Slight chance of rain showers.

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

SYNOPSIS . WTB/Loconto NEAR TERM . WTB/Loconto SHORT TERM . Loconto LONG TERM . WTB AVIATION . WTB/Loconto MARINE . WTB/Loconto


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NLNC3 - 8461490 - New London, CT 36 mi44 min 47°F 1017.7 hPa
LDLC3 - New London Ledge CT - Ledge Light Weather 40 mi37 min WSW 8 G 8.9 46°F 1013.9 hPa43°F
FOXR1 - 8454000 - Providence, RI 49 mi44 min S 4.1 G 5.1 47°F 47°F1017.3 hPa

Wind History for New London, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Willimantic, Windham Airport, CT11 mi70 minN 010.00 miMostly Cloudy48°F43°F83%1017.3 hPa
Hartford, Hartford-Brainard Airport, CT19 mi69 minS 710.00 miOvercast50°F44°F80%1017.2 hPa
Windsor Locks, Bradley International Airport, CT20 mi71 minSE 610.00 miMostly Cloudy50°F43°F77%1016.6 hPa

Link to 5 minute data for KIJD

Wind History from IJD (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmE5S6S5S9S12S10S8S6S5S3S4SE3SE3S4S5S4CalmCalmS3
1 day agoCalmCalmN6N6N11NE9--S6NE5S10
G17
S9S8S5SE6S3S3CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalm6NE94NE7NE75NE7NE6SE6S8S9S3CalmCalmCalmCalmCalmNE3CalmCalmCalmCalm

Tide / Current Tables for Hartford, Connecticut
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Hartford
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Sat -- 02:31 AM EDT     2.05 feet High Tide
Sat -- 06:03 AM EDT     Moonrise
Sat -- 06:18 AM EDT     Sunrise
Sat -- 10:10 AM EDT     0.07 feet Low Tide
Sat -- 02:53 PM EDT     1.94 feet High Tide
Sat -- 06:06 PM EDT     Moonset
Sat -- 07:26 PM EDT     Sunset
Sat -- 10:24 PM EDT     0.14 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.11.6221.91.71.410.60.20.10.30.81.31.81.91.81.71.41.10.70.40.20.2

Tide / Current Tables for Rocky Hill, Connecticut
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Rocky Hill
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Sat -- 01:45 AM EDT     2.16 feet High Tide
Sat -- 06:03 AM EDT     Moonrise
Sat -- 06:18 AM EDT     Sunrise
Sat -- 09:02 AM EDT     0.07 feet Low Tide
Sat -- 02:07 PM EDT     2.04 feet High Tide
Sat -- 06:06 PM EDT     Moonset
Sat -- 07:26 PM EDT     Sunset
Sat -- 09:16 PM EDT     0.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.72.12.221.81.51.10.60.20.10.30.81.31.8221.81.51.20.80.40.20.30.8

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