Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Hartford, CT

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 6:03AMSunset 7:43PM Sunday August 20, 2017 12:10 AM EDT (04:10 UTC) Moonrise 4:37AMMoonset 7:06PM Illumination 5% Phase: Waning Crescent; Moon at 27 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- 1024 Pm Edt Sat Aug 19 2017
Overnight..W winds 5 to 10 kt. Seas 1 ft or less.
Sun..W winds 5 to 10 kt. Seas 1 ft or less.
Sun night..NW winds 5 to 10 kt. Seas 1 ft or less.
Mon..W winds around 5 kt, becoming sw in the afternoon. Seas 1 ft or less.
Mon night..SW winds 5 to 10 kt. Seas 1 ft or less.
Tue..S winds 5 to 10 kt. Seas 1 ft or less.
Tue night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 1 to 2 ft. Chance of showers and tstms.
Wed..SW winds 10 to 15 kt. Seas around 2 ft. Chance of showers and tstms.
Wed night..NW winds 5 to 10 kt. Seas subsiding to 1 ft or less.
Thu..NW winds 5 to 10 kt, becoming W in the afternoon. Seas 1 ft or less.
Thu night..NW winds 5 to 10 kt. Seas 1 ft or less. Winds and seas higher in and near tstms.
ANZ300 1024 Pm Edt Sat Aug 19 2017
Synopsis for the long island waters and new york harbor.. A weak cold front will pass through tonight, followed by high pressure building from the west Sunday into Sunday night. The region remains on the western periphery of the bermuda high from Monday through Tuesday. A cold front approaches from the west Tuesday night then crosses the area on Wednesday. Canadian high pressure then builds in through Thursday.

7 Day Forecast for Marine Location Near Hartford, CT
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location: 41.77, -72.67     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 200112
afdbox
area forecast discussion
national weather service taunton ma
912 pm edt Sat aug 19 2017

Synopsis
A second cold front will cross the region overnight, accompanied by
a few showers and possibly an isolated thunderstorm. Behind the
front, warm but very pleasant late summer weather with lower
humidity Sunday. High pressure brings dry and seasonable weather
Monday. It will be hot and humid Tuesday. Ahead of an approaching
cold front, which will bring a chance of showers and thunderstorms
from late Tuesday afternoon into early Wednesday afternoon. High
pressure will bring dry and cooler weather late in the week
into next weekend.

Near term until 6 am Sunday morning
910 pm update...

fog bank appears to have moved off NE ma coast but may lurk just
offshore or even graze parts of coast again until winds finally
turn W later this evening. Meanwhile, fog has developed around
nantucket and should persist for much of night.

Line of showers storms continues to head E across ny pa. Better
instability is located well to our south across mid atlantic
region, and high-res guidance appears to capture trends well,
showing weakening of activity as it heads into our region
tonight. Still thinking scattered showers with a possible
thunderstorm, mainly in western new england.

Short term 6 am Sunday morning through Sunday night
Sunday...

spectacular late summer weather tomorrow with mid level mean trough
axis pushing offshore resulting in height rises across the area.

Warming temps aloft and flow becoming less cyclonic will yield less
diurnal clouds more sunshine than today. Model soundings show a deep
boundary layer with drier air aloft mixing to the surface. This
combined with downslope wnw winds will result in dew pts falling
into the upper 50s. So despite temps climbing well into the mu80s to
near 90, lowering dew pts will make it somewhat tolerable. Given the
deep blyr and downsloping winds, increased temps a few degs warmer
than guid.

Sunday night...

any diurnal clouds erode with sunset giving way to mostly clear
skies. This combined with high pres building into the area will
promote radiational cooling and temps falling into the upper 50s
outside of the urban areas. Used MOS temps to derive mins tomorrow
night.

Long term Monday through Saturday
Big picture...

at upper levels, closed low pressure will be moving slowly
across canada, from west of james bay Tuesday to eastern quebec
by Saturday. The trough axis extending southward from the low
will remain to our west until Saturday. The cold pool of air
will arrive over our region around Thursday and remain in place
into next weekend.

At the surface, high pressure will pass southeast of the region
Monday. A cold front moves through Wednesday. Then strong high
pressure builds over the great lakes states, with its influence
extending eastward into new england.

Details...

Monday...

high pressure off the DELMARVA coast will provide sunny skies
for southern new england, warm temperatures, and relatively
light southwest winds. Forecasting highs in the mid to upper
80s over most of the interior, with comfortable humidity.

Tuesday...

southwest breezes behind departing high pressure and well in
advance of an approaching cold front will usher in very warm and
more humid air. With 925 mb temperatures of about 25c, am
expecting highs to reach the upper 80s and lower 90s. Winds
could gust to 15-20 mph during the afternoon. Dewpoints will be
rising to near 70 by late afternoon and heat indices will be in
90-94 range, just shy of heat advisory criteria. With the
afternoon heating will come a chance of a few showers and
thunderstorms late in the day, especially in western ma and
northern ct, closer to the approaching front.

Tuesday night-Wednesday...

a cold front will slowly work its way across the region.

Showers and thunderstorm probabilities increase to 40-60 percent
Tuesday night and mainly in eastern sections on Wednesday. The
ecmwf is slower with the frontal progression than the gfs. Wind
fields are somewhat strong, with 35-40 kts at 925 mb and 850 mb
Tuesday night. Cannot rule out a few strong thunderstorms
Tuesday night, even though they would not be occurring during
the maximum heating. Skies will be clearing from west to east
during the day. West to northwest winds could gust to 20 to 25
mph behind the front. Highs mainly 80 to 85 Wednesday.

Thursday-Saturday...

strong high pressure building into the great lakes states will
exert its influence across new england. At the same time, an
upper level trough will be moving overhead, along with it
associated cold pool with 500 mb temperatures reaching -18c
Thursday and continuing into Saturday. It also will be cooler in
the lower levels. Forecasting high temperatures in the 70s each
day, possibly near 80 in spots. It should be dry for the most
part, with scattered diurnal clouds.

Aviation 01z Sunday through Thursday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Sunday night ...

2340z update...

thru sunset...

vfr most locations. The exception will be along the immediate
eastern ma coastline with MVFR ifr conditions in low clouds and
fog.

After sunset...

onshore winds along the eastern ma coastline shift to S and then
sw which will give way to improving conditions, likelyVFR by
03z or so. However, could see development of ifr in fog along
the south coast, including the islands due to high dewpoints.

There is a chance of showers and thunderstorms spreading into
western sections around 03z, central sections by 06z, and
weakening and exiting northeastern sections by 09z. Could have
MVFR CIGS and vsbys in any showers thunderstorms.

Sunday and Sunday night...

vfr, dry weather and modest west wind.

Kbos terminal... Moderate confidence.

Low clouds and fog will dissipate around 02-03z as winds become
light southwest.

Kbdl terminal... High confidence in taf. Chance of a shower or
thunderstorm for a few hours from roughly 04-07z.

Outlook Monday through Thursday ...

Monday through Tuesday... High confidence.VFR. Only exception
will be ifr in patchy late night fog, mainly Monday night, then
improving toVFR by mid morning Tuesday.

Tuesday night-Wednesday... Moderate confidence.VFR Tuesday but
areas of MVFR CIGS vsbys in showers and thunderstorms late
Tuesday afternoon in western sections, across the region Tuesday
night and Wednesday morning, and in eastern sections Wednesday
afternoon. Ifr CIGS possible in early morning fog low clouds
especially in areas that have had rain. Clearing in west half
wed. Afternoon. Clear Wed night.

Thursday... High confidence.VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Sunday night ... Moderate confidence.

Tonight...

onshore winds across the eastern ma waters veer to the SW after
sunset and then west toward daybreak. Patchy low clouds fog will
also move offshore with the wind shift this evening and especially
toward daybreak. Elsewhere, ssw winds continue with areas of fog
possibly redeveloping along the south coast. Chance of a shower
late tonight, especially along the north coast.

Sunday...

modest wnw winds will promote dry weather and good vsby.

Sunday night...

wnw winds become very light as high pres build in from the west. Dry
weather and good vsby prevail.

Outlook Monday through Thursday ...

Monday through Tuesday... High confidence.

High pressure south of the waters. Southwest winds remain less
than 15 knots Monday but may increase to near 20 knots late
Tuesday. Seas less than 3 ft, but increasing to 3 to 4 ft over
the outer waters late Tuesday.

Tuesday night-Wednesday... Moderate confidence.

A cold front approaches from the great lakes, crossing the
waters late Wednesday or Wednesday night. Southwest winds
increase with gusts 20 to 25 knots during Wednesday. Winds shift
to the northwest Wednesday night. Seas build Tuesday night and
Wednesday reaching 5 to 6 ft on the outer waters. The southwest
flow may also nudge those higher seas into ri sound as well. A
small craft advisory may be needed on some of the waters during
this time.

Thursday... High confidence.

As high pressure to our north and west builds over the northeast
states, winds will turn more to the north and northeast. But
they will be diminishing to less than 10-15 knots and seas will
subside to 3 ft or less.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... None.

Synopsis... Nocera gaf
near term... Jwd
short term... Nocera
long term... Gaf
aviation... Nocera gaf
marine... Nocera gaf


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWHC3 - 8465705 - New Haven, CT 36 mi40 min W 5.1 G 6 77°F 78°F1011.9 hPa
NLNC3 - 8461490 - New London, CT 42 mi40 min Calm G 2.9 75°F 72°F1011.6 hPa
BRHC3 - 8467150 - Bridgeport, CT 49 mi40 min W 1.9 G 4.1 77°F 76°F1011.3 hPa

Wind History for New Haven, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hartford, Hartford-Brainard Airport, CT3 mi17 minS 610.00 miFair72°F66°F84%1011.1 hPa
Windsor Locks, Bradley International Airport, CT12 mi19 minSSW 410.00 miA Few Clouds72°F64°F79%1011.1 hPa
Meriden, Meriden Markham Municipal Airport, CT20 mi17 minN 010.00 miFair68°F66°F93%1011.5 hPa

Wind History from HFD (wind in knots)
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Last 24hrS7S5S4S3S3CalmW3N4N4CalmNE34W8W5W11
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1 day agoCalmS3S4S4SE4S5S8S9S8S11
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2 days agoNE3N4N4N5N6NE3CalmNE3CalmNE33E3--SW53S5SE4S8S6S8S5S3S4S3

Tide / Current Tables for Hartford, Connecticut River, Connecticut
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Hartford
Click for MapNote: Tidal information only applies during low river stages.

Sun -- 01:42 AM EDT     2.62 feet High Tide
Sun -- 04:37 AM EDT     Moonrise
Sun -- 06:04 AM EDT     Sunrise
Sun -- 09:48 AM EDT     -0.15 feet Low Tide
Sun -- 02:04 PM EDT     2.19 feet High Tide
Sun -- 07:05 PM EDT     Moonset
Sun -- 07:42 PM EDT     Sunset
Sun -- 09:58 PM EDT     -0.02 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.92.52.62.42.11.81.30.80.3-0-0.10.41.21.92.22.11.91.51.20.80.40.1-00.4

Tide / Current Tables for Rocky Hill, Connecticut River, Connecticut
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Rocky Hill
Click for MapNote: Tidal information only applies during low river stages.

Sun -- 12:42 AM EDT     2.54 feet High Tide
Sun -- 04:37 AM EDT     Moonrise
Sun -- 06:04 AM EDT     Sunrise
Sun -- 08:32 AM EDT     -0.13 feet Low Tide
Sun -- 01:04 PM EDT     2.13 feet High Tide
Sun -- 07:05 PM EDT     Moonset
Sun -- 07:42 PM EDT     Sunset
Sun -- 08:42 PM EDT     -0.02 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.42.52.42.11.71.20.70.2-0.1-0.10.51.31.92.121.81.51.10.80.40.100.51.3

Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Boston, MA (0,6,7,8)
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Ground Weather Radar Station Upton, NY
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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.