Thursday, June22, 2017 L-36.com


Marine Weather and Tides
Henderson, NY

Version 3.4
What's New / NOTES
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 5:19AMSunset 8:52PM Thursday June 22, 2017 2:27 PM EDT (18:27 UTC) Moonrise 3:18AMMoonset 6:10PM Illumination 2% 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
    EDIT      (on/off)   Help
LOZ045 Mexico Bay To The Saint Lawrence River Along Lake Ontario- 143 Pm Edt Thu Jun 22 2017
This afternoon..Southwest winds 5 to 10 knots becoming south. A chance of showers. Waves 1 foot or less.
Tonight..Southeast winds 5 to 15 knots becoming southwest. Showers likely with a chance of Thunderstorms. Waves 1 foot or less.
Friday..Southwest winds 10 to 15 knots. A chance of showers and Thunderstorms in the morning...then showers and Thunderstorms in the afternoon. Some Thunderstorms may produce gusty winds in the afternoon. Waves 2 feet or less.
Friday night..Southwest winds 5 to 10 knots becoming west and increasing to 15 to 20 knots. Showers and Thunderstorms likely in the evening...then a chance of showers and Thunderstorms overnight. Some Thunderstorms may produce gusty winds in the evening. Waves 1 foot or less building to 2 to 4 feet.
Saturday..West winds 10 to 15 knots. Partly cloudy. Waves 3 to 5 feet subsiding to 2 feet or less. Waves occasionally around 6 feet.
Sunday..West winds 15 to 25 knots diminishing to 5 to 10 knots. Showers likely. Waves 3 to 6 feet building to 4 to 7 feet...then subsiding to 1 to 3 feet. Waves occasionally around 9 feet.
Monday..Southwest winds 5 to 15 knots increasing to 15 to 20 knots. A chance of showers and Thunderstorms. Waves 2 feet or less building to 3 to 6 feet. Waves occasionally around 7 feet. Winds and waves higher in and near Thunderstorms.
LOZ045 Expires:201706222100;;647655 FZUS51 KBUF 221743 NSHBUF Nearshore Marine Forecast National Weather Service Buffalo NY 143 PM EDT Thu Jun 22 2017 For waters within five nautical miles of shore Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. LOZ045-222100-

7 Day Forecast for Marine Location Near Henderson, NY
   Hourly   EDIT   Help
location: 43.93, -76.25     debug


Area Discussion for - Buffalo, NY
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kbuf 221503
afdbuf
area forecast discussion
national weather service buffalo ny
1103 am edt Thu jun 22 2017

Synopsis
Surface high pressure will slide off the east coast today... While
allowing a warm front to press into our region from the ohio valley.

The warm front will bring a general chance of showers and thunderstorms
as it lifts across the area this afternoon and tonight... While also
ushering in a much warmer and more humid airmass. Showers and storms
will then become more widespread across our area on Friday as tropical
moisture surges across our area in advance of an approaching cold
front... Which will then cross new york state late Friday and Friday
night. In the wake of the front... Cooler and somewhat unsettled
weather will follow for this weekend as broad upper level troughing
digs across the great lakes.

Near term through tonight
As of 15z... Regional surface analysis shows surface high pressure
draped across the spine of the appalachians... With an elongated warm
frontal zone extending all the way from low pressure over manitoba to
central lake erie and northwestern pennsylvania. While skies are still
mostly sunny across the bulk of our region... Mid and high clouds are
beginning to increase across extreme far western new york... Out in
advance of a weakening complex of showers and embedded thunderstorms
working its way eastward across the central great lakes and southern
ontario.

Through the rest of the day... The surface warm front will continue to
make its way northeastward into our region... With the boundary reaching
the lower genesee valley and western finger lakes by late this afternoon
or early this evening. This will result in a continued increase in cloud
cover from west to east... With the risk for some showers and a few
thunderstorms also spreading across the area in a similar manner this
afternoon as the remnants of the upstream convection work into our region.

The above stated... These should tend to be much more scattered by the
time they arrive... As the much drier and more stable airmass currently
across our region should take a decided toll on the already weakening
mcs as it presses further eastward.

Following the warm frontal passage... Much warmer and more humid air
will overspread far western new york this afternoon. With some heating...

this could result in the development of enough instability to pop a
few additional scattered showers and storms late this afternoon early
this evening across the southern tier. Should these actually materialize
(a factor that remains in considerable question as of this writing)...

available instability and shear profiles could be sufficient for a couple
of storms capable of producing locally gusty winds in this latter area...

something that we'll need to keep an eye out for as we push through the
afternoon and early evening hours.

Temperature-wise... Continued steady warm air advection across our region
will push 850 mb temps up to between +13c and +17c by late this afternoon...

which should translate into high temps ranging from the mid and upper 70s
across the north country to the lower to mid 80s across much of the area
south of lake ontario. Humidity levels will also be on the increase as
well... Particularly across far western new york where surface dewpoints
will climb into the lower to mid 60s by late this afternoon.

Tonight the surface warm front will continue to make steady northward
progress... With this feature largely clearing our area by daybreak on
Friday. While the bulk of any associated convection should tend to
focus along and northward of the advancing front (i.E., across lake
ontario... The north country... And saint lawrence valley)... Some additional
scattered convection will still be possible across the rest of the area
given the continued advection of an increasingly warm and moisture-rich
airmass across our region... For which some chance pops remain in play.

The increasingly tropical nature of the incoming airmass will also
result in a rather uncomfortable night for sleeping... With surface
dewpoints surging well into the mid and upper 60s... And overnight lows
failing to drop below the upper 60s (higher terrain) to lower 70s
(lake plains).

Short term Friday through Saturday night
Very warm and humid conditons will be in place across western and
central ny Friday ahead of an approaching cold front. Expect
building instability and an increase of synoptic scale forcing will
bring an increasing threat for heavy showers and thunderstorms
through the afternoon and evening hours. Southwest flow off the
lakes may try to limit convection across the niagara frontier and
near watertown, with the greatest coverage likely from the western
southern tier into the finger lakes and southern tug hill region.

Dewpoints 65-70 degrees will combine with temperatures climbing into
the upper 70s to mid 80s will make for very steamy conditions during
the day away from any cooling lake breezes or thunderstorm outflows.

Concerning severe potential, SBCAPE forecast 1000-3000 j kg (highest
east of lake breezes) and 30-35 kts of 0-6km bulk shear could
support a risk for strong to severe storms. SPC has included ny
within a marginal risk area for severe storms so have added wording
for gusty winds to higher thunderstorm pops. Heavy rain is also a
concern as GFS forecast pwat reaches 1.75-2 inches just ahead of the
front supporting heavy downpours with a few storms. Wpc has also
included much of ny within a marginal risk area for excessive
rainfall. Have added some enhanced wording to higher pops for heavy
rain within thunderstorms.

Friday night the cold front will sweep east across the area, with
showers and thunderstorms ending from northwest to southeast by or
shortly after midnight. Cold air advection behind the front will
bring in a cooler and drier airmass with partial clearing developing
from northwest to southeast overnight. The drier airmass will allow
temperatures to fall into the lower 60s on the lake plains and upper
50s across the higher terrain.

Saturday, a broad longwave trough will shift over the great lakes
brings cooler air aloft over western and central ny. This cool air
aloft will steepen low and mid level lapse rates to support diurnal
cumulus and a chance for some showers and possibly weak
thunderstorms well inland from developing lake shadows. A stiff
southwest flow off lake erie will converge with westerly flow over
lake ontario supporting the development of a lake breeze convergence
zone from niagara county east along the south shore of lake ontario
to oswego county. This band of convergence combined with the steep
lapse rates may support a few scattered showers and isolated
thunderstorms Saturday afternoon. Continued cold air advection will
support more comfortable temperatures with highs in the low to mid
70s in most locations and some breezy winds. Any enhanced lake
breeze convection Saturday evening will end shortly after sunset
leaving partial clearing overnight. Expect the even drier airmass to
allow cool low temperatures in the mid 50s on the lake plains and
around 50 across the interior southern tier and lewis county.

Long term Sunday through Wednesday
The longwave trough over the great lakes is forecast to remain in
place into at least next Tuesday and possibly even next Wednesday as
progression of the upper level flow pattern is stalled by a strong
high pressure area over the north atlantic. This pattern will
support several days of cooler temperatures will comfortable humidly
levels with daytime highs perhaps topping out within a few degrees
of the 70 degree mark. The trough axis is starting to look like it
may cross western and central ny on Monday which supports higher
end chance range pops. Otherwise, cool air aloft within the trough
will support a day-to-day threat of showers and possibly low topped
thunderstorms mainly inland of lake breezes. These showers and
thunderstorms will be further focused by any shortwaves rotating
around the mean trough. If this environment can be coupled with a
stout shortwave, would not rule out some small-hail producing storms
given the lower freezing level heights and steep lapse rates aloft,
especially if storms focus along a lake breeze boundary.

Aviation 15z Thursday through Monday
Mid high clouds will increase across the region through the rest of the
day... As a warm front lifts north into the area. While a few scattered
showers and thunderstorms will be possible with the arrival of the warm
front... Much of the afternoon should feature mainly dry weather andVFR
conditions.

Showers may linger along the front across lake ontario and the north
country overnight, as the front stalls over ontario province. Overall
though, conditions should remainVFR, with occasional period of MVFR
conditions in -shra -tsra. Increasing advection of deeper moisture into
the area late tonight may drive CIGS down to MVFR across higher terrain
of the southern tier, however. In addition, a strengthening low level jet
aloft may result in llws later tonight, particularly across far western
new york.

Outlook...

Friday...VFR MVFR with widespread showers and thunderstorms.

Friday night...VFR MVFR with rain showers and a chance of thunderstorms.

Saturday and Sunday... MainlyVFR with a chance of showers and thunderstorms.

Monday... MainlyVFR with a chance of showers.

Marine
High pressure will keep conditions tranquil on the lakes for much of
the day, with the exception of southwesterly lake breezes to around
15kts on the northeastern ends of the lakes this afternoon.

Southerly winds will freshen tonight as a warm front crosses the
region and low pressure develops over the central great lakes. This
will largely keep wave action confined to canadian waters however,
and the only serious threat for small craft advisory conditions will
not be until Friday night, when a cold front crossing the region
will bring cooler temperatures and fresh westerly flow that will
raise waves above 4-5 feet on the eastern end of lake ontario. The
fresh westerly flow and subsequent SCA conditions will likely
continue through the weekend, thanks to persistent upper level
troughing in place across the region.

Buf watches warnings advisories
Ny... None.

Marine... None.

Synopsis... Jjr
near term... Jjr
short term... Smith
long term... Smith
aviation... Jjr wood
marine... Wood


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
ALXN6 - 8311062 - Alexandria Bay, NY 32 mi40 min 64°F1013.4 hPa
45135 - Prince Edward Pt 34 mi88 min SW 5.8 G 5.8 63°F 64°F1 ft1014.4 hPa (-1.1)
OSGN6 - 9052030 - Oswego, NY 35 mi40 min NE 1.9 G 2.9 67°F 1013.3 hPa60°F
OBGN6 - 8311030 - Ogdensburg, NY 67 mi46 min 71°F 1013 hPa
RPRN6 - Rochester, NY 85 mi28 min E 4.1 G 5.1 69°F 1013.9 hPa (-1.7)

Wind History for Oswego, NY
(wind in knots)    EDIT      (on/off)   Help
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
12
PM
1
PM
2
PM
Last
24hr
W10
W11
W9
G13
W10
W7
G13
W7
G11
SW5
SW7
SW5
S3
S3
S3
S5
S5
S4
S6
S6
G9
S6
SW6
G9
W10
W6
NW5
W3
NE4
1 day
ago
W9
G12
SW5
G12
SW7
G10
SW7
G11
SW6
G9
SW5
G8
S5
S5
S9
NW16
G22
W11
W3
G6
S5
S6
S6
S6
W9
G14
W11
G15
W15
W14
G18
W13
G16
W12
G15
W12
G15
NW9
G13
2 days
ago
N3
N2
NW2
W2
S9
G12
SE8
SE3
S8
G11
S9
G12
S10
S7
G13
S10
G13
SW7
G10
S7
G10
S7
G11
S6
G9
SW9
G14
W14
G19
SW11
G15
W12
G20
W18
W9
G12
W9
G13
W8

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watertown, Watertown International Airport, NY13 mi92 minWSW 510.00 miPartly Cloudy69°F61°F76%1014.1 hPa

Wind History from ART (wind in knots)
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
12
PM
1
PM
2
PM
Last 24hrW13W12
G19
SW10
G17
W11
G18
W11
G17
SW10SW8SW5S5SW4S3S5S6S4S3S3S5SW7SW8W8W10W8W5W6
1 day agoSW14
G21
W12
G18
SW16
G22
SW9SW14SW10
G16
SW8SW6S3W12
G22
S3S4S4SW7SW10
G16
SW9W11
G18
W11
G19
SW13W13
G19
SW11
G18
W12SW10
G18
SW11
G18
2 days agoW6W6SW6SW8SW5S6S5S9
G16
S54S4S5S5SW6SW9W10
G19
SW9SW9
G17
SW13
G19
SW14
G21
SW12
G21
SW12
G21
SW14
G23
W14
G20

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
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 Buffalo, NY (14,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Montague, NY
   (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.