Sunday, April30, 2017 L-36.com


Marine Weather and Tides
Colchester, CT

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:43AMSunset 7:47PM Sunday April 30, 2017 10:51 AM EDT (14:51 UTC) Moonrise 9:34AMMoonset 12:00AM Illumination 21% Phase: Waxing Crescent; Moon at 5 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
    EDIT      (on/off)   Help
ANZ330 Long Island Sound East Of New Haven Ct/port Jefferson Ny- 632 Am Edt Sun Apr 30 2017
Today..NE winds 5 to 10 kt...becoming E late this morning. Seas 1 ft or less.
Tonight..E winds 5 to 10 kt. Seas 1 ft or less. Patchy fog in the evening. Patchy dense fog after midnight. Vsby 1 to 3 nm... Decreasing to 1 nm or less after midnight.
Mon..E winds 5 to 10 kt...becoming S in the afternoon. Seas 1 ft or less. Areas of drizzle and patchy fog in the morning with vsby 1 to 3 nm.
Mon night..S winds 10 to 15 kt...increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas building to 2 to 3 ft. Showers likely.
Tue..SW winds 10 to 15 kt with gusts up to 25 kt. Seas around 2 ft. Chance of showers in the morning.
Tue night..SW winds 10 to 15 kt. Gusts up to 25 kt in the evening. Seas around 2 ft.
Wed..W winds 10 to 15 kt...becoming nw 5 to 10 kt after midnight. Seas around 2 ft...then 1 ft or less after midnight. Chance of rain after midnight.
Thu..N winds around 5 kt...becoming se. Seas 1 ft or less. Chance of rain in the morning...then rain likely at night. Showers likely after midnight. Vsby 1 to 3 nm in the evening.
ANZ300 632 Am Edt Sun Apr 30 2017
Synopsis for long island waters and new york harbor.. High pressure builds down from southeastern canada today...then retreats to the northeast into Monday...allowing a warm front to lift to the north during the day on Monday. A cold front slowly crosses the tri-state Monday night and Tuesday morning...followed by high pressure building in through Wednesday night...then sliding offshore into Thursday. An area of low pressure approaches from the southwest on Thursday.

7 Day Forecast for Marine Location Near Colchester, CT
   Hourly   EDIT   Help
location: 41.51, -72.33     debug


Area Discussion for - New York City/Upton, NY
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kokx 301126
afdokx
area forecast discussion
national weather service new york ny
726 am edt Sun apr 30 2017

Synopsis
High pressure building into new england slowly moves east of the
area through tonight. A warm front moves northward through the
area tomorrow morning, followed by a cold front moving in from
the west Monday night and passing through the area by Tuesday
morning. High pressure builds in briefly for the middle of the
week. An area of low pressure will bring unsettled weather for
the end of the week into the weekend.

Near term /until 6 pm this evening/
Only minor updates needed to reflect current temperature and dew
point trends, as cooler air has been slower to advect southward
than previously forecast. Previous discussion follows.

A surface high will continue to build into new england beneath
confluence aloft between a departing trough and building high
pressure centered off the southeast coast. Onshore flow
gradually develops by afternoon, with a strengthening low-level
inversion and increasing cloud cover through the day. Despite
elevated instability, the strengthening subsidence inversion and
overall lack of forcing mechanism will limit any thunderstorm
chances. Highs will be much cooler than yesterday, even a few
degrees below climatological normals, follow this morning's cold
frontal passage and with the afternoon/evening onshore flow and
cloud cover.

Short term /6 pm this evening through 6 pm Monday/
Continued onshore flow will lead to low-level saturation, with
increasing chances for light drizzle through the evening and
into Monday night, particularly as warm advection strengthens
ahead of the returning/modified cold front. Low temperatures
will be closer to climatological normals. The warm front is
expected to move north of the area by morning/early afternoon
with brief clearing possible behind the front. Meanwhile, the
upper high off the southeast coast will gradually shift eastward
ahead of a closed upper low. At this time, there is no clear
signal for a pre- frontal trough, though there is a possibility
of a convectively induced vorticity maximum moving through the
area ahead of the main upper trough that may be sufficient
enough to produce isolated afternoon thunderstorms, primarily
north and west of the city. Afternoon highs largely depend on
how quickly the warm front moves through and how much clearing
can occur following its departure, though highs will likely be
much warmer than Sunday.

Long term /Monday night through Saturday/
The cold front moves through from west to east Monday night,
with rain and isolated thunderstorms clearing the area by
Tuesday morning. Low temperatures will be mild amidst cloud
cover and south flow, generally 5 to 10 degrees above
climatological normals. Flow becomes more westerly following the
frontal passage for Tuesday, and despite cold advection the
westerly component will be favorable for downslope warming which
may keep high temperatures a few degrees above guidance. Expect
above normal highs for Tuesday. By Wednesday, a subtle upper
trough and attendant cold front pass through the area by
afternoon/evening, with a reinforcement of cold advection and
temperatures closer to or slightly below normal. By late week,
upper difluence ahead of a developing system across the central
us will support moisture advection along the east coast and the
intensification of a surface low across the southeast that will
gradually traverse northeastward into the region, leading to a
period of unsettled weather into the weekend.

Aviation /12z Sunday through Thursday/
High pressure builds down from southeastern canada today. This
high retreats to the northeast tonight, as a warm front
approaches from the southwest.

Vfr through at least 20z, but will see 4000-5000 ft ceilings by
around midday. MVFR conditions develop by late afternoon/early
evening, ifr conditions are likely by late evening/around
midnight at all but kswf and kgon, where they should develop
after midnight. Airport minimums for ceiling and/or visibility could
possibly be reached late tonight/early Monday morning.

Winds continue to veer around to the E this morning, with
speeds generally around to just under 10 kt. Winds veer to the
e-ese this afternoon, with speeds mainly around 10kt, with some
13-14kt sustained speeds possible at city terminals. Occasional
gusts to 15-20kt are possible this afternoon. Winds become east
throughout this this evening, with speeds 10 kt or less, then
become light and variable overnight.

Outlook for 12z Monday through Thursday
Monday Ifr or lower likely through morning, with a chance
for improvement to MVFR orVFR in the afternoon.

Monday night Ifr or lower conditions, llws and scattered
thunderstorms are possible.

Tuesday-Wednesday night Vfr. Sw-wsw winds g15-20kt possible
Tuesday. W-nw winds g15-25kt possible Wednesday/Wednesday
night.

Thursday MVFR or lower conditions developing is possible.

Marine
A light to moderate pressure gradient over the waters through Monday
morning will limit winds to 15 kt or less. The pressure gradient
increases Monday afternoon, with winds up to 20 kt. Coastal ocean
waters could see some gusts up to 25 kt by Monday afternoon, with a
persistent onshore flow building seas to 5-6 ft over southern
portions of the coastal ocean zones on Monday as well.

The winds increase on Monday night, with solid small craft
conditions on the coastal ocean waters. As a result, have issued an
sca for the coastal ocean waters for Monday and Monday night. On the
non-ocean waters Monday night, gusts to small craft levels possible,
but given limited mixing, confidence is not high enough to warrant
headlines at this time.

From Tuesday into Tuesday night, all waters likely will experience
sca conditions with gusts of 25-30 kt.

The pressure gradient relaxes to light to moderate again by
Wednesday, and remains so through Thursday, limiting winds to 15 kt
or less. SCA level seas should linger on the coastal ocean waters
into Wednesday, then possibly return again by late Thursday ahead of
the next storm system.

Hydrology
No hydrologic impacts are expected through the forecast period.

Okx watches/warnings/advisories
Ct... None.

Ny... None.

Nj... None.

Marine... Small craft advisory from 6 am Monday to 6 am edt Tuesday for
anz350-353-355.

Synopsis... Md
near term... Md
short term... Md
long term... Md
aviation... Maloit
marine... Maloit
hydrology... Md


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NLNC3 - 8461490 - New London, CT 16 mi51 min SE 11 G 15 56°F 47°F1024.3 hPa (+1.2)
44039 - Central Long Island Sound 31 mi81 min NE 3.9 G 5.8 52°F 44°F
NWHC3 - 8465705 - New Haven, CT 34 mi51 min Calm G 6 59°F 53°F1024.8 hPa (+0.9)
MTKN6 - 8510560 - Montauk, NY 37 mi51 min 53°F 50°F1025.1 hPa (+1.5)
QPTR1 - 8454049 - Quonset Point, RI 49 mi51 min NNE 7 G 9.9 55°F 51°F1025.3 hPa (+1.3)

Wind History for New London, CT
(wind in knots)    EDIT      (on/off)   Help
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last
24hr
SW10
G13
W7
G13
W5
SW11
G16
SW10
G15
W9
G16
SW11
G16
W5
G8
N6
G9
N8
G11
N8
G11
N6
N6
W5
G8
N4
G8
N9
G12
N4
G10
N6
G9
N3
G6
N4
N3
G7
NE4
G8
NE3
G7
SE11
G15
1 day
ago
S4
S9
S7
S5
G9
S11
S7
SW7
G11
S6
SW4
G7
S2
SW1
E1
S4
S4
S5
S3
S3
S2
SE2
NE1
S2
S9
SE1
G4
S12
G16
2 days
ago
S8
S6
S5
S4
S8
G11
S8
G11
SW6
S9
S7
S7
SW5
--
--
SE2
SE4
SE5
SE3
S2
S2
S4
--
S3
S4
S2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chester, Chester Airport, CT13 mi56 minE 310.00 miMostly Cloudy59°F37°F45%1024.4 hPa
Willimantic, Windham Airport, CT18 mi59 minN 010.00 miFair62°F35°F37%1024.5 hPa
Groton / New London, Groton / New London Airport, CT19 mi55 minESE 1510.00 miMostly Cloudy55°F42°F62%1024.3 hPa
Hartford, Hartford-Brainard Airport, CT23 mi58 minN 010.00 miOvercast57°F36°F45%1024.6 hPa

Wind History from SNC (wind in knots)
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
Last 24hrSW7
G14
SW8
G16
W10
G18
6
G14
S12W11
G24
W8
G18
W12
G21
--N11N10
G16
NW7
G13
NW5NW7NW10N13N10
G16
N9N5N55NE656
1 day agoW4CalmCalmS6S7SW8
G15
SW9
G15
SW7SW7SW6SW6SW6SW74SW6SW6W5W5--SW3S8CalmCalmS8
2 days agoS54CalmS66
G11
S7S7SE8S7S6SE5CalmSE3SE4SE5E3SE3SE3CalmS4CalmS4SW4Calm

Tide / Current Tables for Tylerville, Connecticut River, Connecticut
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tylerville
Click for MapNote: Tidal information only applies during low river stages.

Sun -- 03:27 AM EDT     3.56 feet High Tide
Sun -- 05:48 AM EDT     Sunrise
Sun -- 09:34 AM EDT     Moonrise
Sun -- 10:34 AM EDT     -0.35 feet Low Tide
Sun -- 04:02 PM EDT     2.81 feet High Tide
Sun -- 07:46 PM EDT     Sunset
Sun -- 10:43 PM EDT     0.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.52.43.13.53.53.12.51.810.3-0.3-0.30.31.222.62.82.62.21.71.20.70.30.2

Tide / Current Tables for The Race, Long Island Sound, New York Current
   EDIT      (on/off)   Help   One Week of Data
The Race
Click for Map
Sun -- 02:57 AM EDT     -0.00 knots Slack
Sun -- 05:46 AM EDT     Sunrise
Sun -- 06:08 AM EDT     -3.93 knots Max Ebb
Sun -- 09:27 AM EDT     0.00 knots Slack
Sun -- 09:33 AM EDT     Moonrise
Sun -- 12:16 PM EDT     3.27 knots Max Flood
Sun -- 03:37 PM EDT     -0.00 knots Slack
Sun -- 06:36 PM EDT     -3.30 knots Max Ebb
Sun -- 07:44 PM EDT     Sunset
Sun -- 09:42 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.52.81.5-0.1-1.8-3.3-3.9-3.6-2.4-0.80.92.53.232.20.9-0.6-2.1-3.1-3.2-2.4-1.10.52

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for New York City/Upton, NY (10,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Boston, MA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.