Marine Weather and Tides
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 6:54AM||Sunset 7:39PM||Thursday March 30, 2017 2:44 AM EDT (06:44 UTC)||Moonrise 7:46AM||Moonset 9:51PM||Illumination 8%|
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|LOZ062 Lake Ontario Open Waters From The Niagara River To Hamlin Beach- 124 Am Edt Thu Mar 30 2017 |
Overnight..East winds 10 to 15 knots. Waves 2 to 3 feet.
Thursday..East winds 15 to 20 knots. Rain late. Waves 2 to 4 feet building to 3 to 5 feet.
Thursday night..East winds 20 to 25 knots. Rain with a chance of Thunderstorms. Waves 3 to 6 feet.
Friday..East winds 15 to 25 knots. Rain. Waves 4 to 6 feet.
Friday night..East winds 15 to 20 knots becoming northeast 10 to 15 knots. Rain. Waves 3 to 5 feet subsiding to 2 to 3 feet.
Saturday..North winds around 10 knots becoming northwest. A chance of rain showers during the day. Waves 1 to 3 feet.
Sunday..Northwest winds 5 to 10 knots becoming north. Waves 1 to 2 feet.
Monday..East winds 5 to 15 knots. A chance of rain showers Monday night. Waves 1 to 2 feet. Winds and waves higher in and near Thunderstorms.
|LOZ062 Expires:201703300915;;296782 FZUS61 KBUF 300524 GLFLO OPEN LAKE FORECAST FOR LAKE ONTARIO NATIONAL WEATHER SERVICE BUFFALO NY 124 AM EDT THU MAR 30 2017 FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE ONTARIO .SYNOPSIS...A 29.6 INCH LOW WILL MOVE TOWARD THE OHIO VALLEY FRIDAY AND THEN OFF THE NEW JERSEY COAST SATURDAY. A 30.2 INCH HIGH WILL MOVE OVER THE NORTHERN GREAT LAKES EARLY IN THE WEEKEND THEN OVERHEAD FOR SUNDAY. LOZ062-300915-|
7 Day Forecast for Marine Location Near Lyndonville, NYHourly EDIT Help
Area Discussion for - Buffalo, NY  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kbuf 300524|
area forecast discussion
national weather service buffalo ny
124 am edt Thu mar 30 2017
High pressure north of the region will move east tonight while a
low pressure system over the mississippi valley draws moisture
northward toward the new york on Thursday. Chances for rain
will increase over far western new york Thursday afternoon, with
precipitation spreading across all of western and central new
york Thursday night. This complex system may bring some thunder
to far western new york while a brief period of snow will be
possible east of lake ontario. The system will change to all
rain by Friday and move east of the region for the weekend.
Near term /through today/
Overnight... High pressure will build east into quebec with a ridge
extending down into ny. Increasing mid/upper level warm advection
will bring a gradual increase in high clouds from west to east
overnight. The high clouds will be thin enough to allow for some
radiational cooling, but will hinder the process a bit. Low
temperatures will drop below freezing for most locations, with the
coldest readings in the mid 20s in the north country.
Model consensus has trended faster with the onset of precipitation
on Thursday. The 18z and 00z NAM in particular are faster, with the
hrrr and current radar trends also supporting the faster trend.
Expect rain to enter the western southern tier around noon,
spreading into buffalo by mid-afternoon and to rochester late
afternoon. Latest model consensus supports a start time about 3
hours faster than 12z based guidance.
This faster timing has other impacts to the forecast, with
cooler high temperatures expected, especially across western
portions. It's also interesting to note that bufkit thermal
profiles support a brief period of rain and snow mix across the
lower genesee valley and finger lakes regions late Thursday
afternoon. Given the march sun, this is not likely to produce
any accumulation, but it is possible a few snow flakes will be
mixed in at the onset.
Short term /tonight through Saturday night/
Let there be no doubt... It is going to be wet and unsettled for much
of this period as another soaking rain will be in the offing. The
good news is that the rain will pull away from the region just in
time to give us a fairly nice weekend.
A storm system... Currently spawning severe weather across the lower
mississippi valley... Will approach our region from the ohio valley
Thursday night. A 40kt low level jet ahead of this stacked low will
pump abundant gomex moisture up and over a tight h925-70 baroclinic
zone that will be in place over the lower great lakes. A weakly
coupled h25 jet will accompany the isentropic lift... So plenty of
forcing will be in place to interact with a moisture rich (pwat arnd
1") environment. This will encourage some locally moderate to heavy
rain... And as mentioned in a previous discussion... Could support the
potential for elevated convection. Pattern recognition... Including
the strength of the warm frontal boundary... Has looked impressive
for several days. Finally... Forecast soundings are suggesting steep
enough lapse rates aloft for elevated CAPE values in excess of 100
j/kg. Will add the chance for thunderstorms to the western zones...
with some enhanced wording for some heavy rain. These should be
focused along an axis of mid-level warm air advection which will
spread from sw-ne Thursday evening. Rain may briefly taper off
behind this across the western southern tier Thursday evening
before the next round of steady rain moves in later in the
For sites east of lake ontario... The pcpn could start off as a
wintry mix... So will maintain that wording. Snow should struggle
to accumulate in most areas, but precipitation rates should be
ample for some accumulation across higher terrain. Several
inches are possible across higher terrain before warmer mid-
level air changes precipitation over to rain late in the night.
This is a difficult snow forecast since temperatures will be
The stacked low will drift across the upper ohio valley on Friday...
while its associated warm frontal boundary will push north across
lake ontario and the north country. This will encourage the
steadiest and 'heaviest' rain to move across the eastern lake
ontario region in the vcnty of the strongest isentropic lift... While
mainly hgt falls and a divergent upper level flow will drive lesser
rains (including some drizzle) over the western counties... And in
particular across the southern tier. Will use cat pops across all of
the forecast area. Any mixed pcpn at the start of the day over the
north country will change to just rain by late morning. Afternoon
temperatures will range form the upper 40s near the pennsylvania
border to the upper 30s across the eastern lake ontario region.
As the upper level support for the complex storm system drifts east
across pennsylvania Friday night... The initial sfc reflection will
weaken then 'jump' (redevelop) off the new jersey coast. While the
bulk of the moisture will remain in place over the region during the|
storms transition to the coast... Only limited low level forcing will
persist. This will allow the widespread rain to taper off as a bit
of light rain and/or drizzle... Again mainly over the southern tier.
Given the light sfc gradient and near saturated conditions... There
will likely be some fog as well... With dense fog possible over the
While mid level ridging will make its way across the lower great
lakes on Saturday... Guidance is suggesting that a weakness in the
sfc pressure field will remain in place over our forecast area. This
will promote enough of a cyclonic flow in the low levels to combine
with leftover low level moisture (trapped beneath a subsidence
inversion) to keep much of the day shrouded under clouds. Temps
Saturday afternoon will be in the mid to upper 40s.
A shortwave in the northern branch will sweep across the st lawrence
valley Saturday night... Glancing by our forecast area in the
process. While there will still be a fair amount of low level
moisture in place... High pressure nosing south from hudson bay
should supply us with fair dry weather. Temps Saturday night will
generally settle into the low to mid 30s.
Long term /Sunday through Wednesday/
Ridging moving across the lower great lakes should supply us with a
nice ending to the weekend... As at least partial sunshine and h85
temps near zero c will enable afternoon temperatures to get into the
50s (up 40s ERN lake ont region).
Another southern stream closed low over the southern plains and
lower mississippi valley will amplify a downstream ridge over the
ohio valley Sunday night and Monday. This will keep fair dry weather
in place with temperatures remaining a few degrees above early april
The various medium range guidance packages diverge with their
solutions at this point... As one forecast 'camp' opens up the
southern stream closed low and drifts it across our forecast area
late Monday night and Tuesday. The other 'camp' keeps the bulk of
the system to our south... With notably lower pops and qpf. Will
maintain the likely pops over our region on Tuesday to avoid flip
While there is low confidence in the guidance for Wednesday... There
is general consensus that our forecast area will be in a lull as far
as pcpn is concerned. Will refrain from the details due to the large
variance among the various ensemble members of the GEFS and ecmwf.
Aviation /06z Thursday through Monday/
High pressure will build east across quebec overnight into Thursday
morning with a ridge extending down into ny. This will support a
continuation ofVFR conditions with high clouds gradually increasing
from west to east and lowering into a mid level deck Thursday
morning. Increasing warm advection ahead of a warm front will allow
rain to develop across western ny during the afternoon, with rain
then spreading east into central ny by evening. Expect cigs/vsby to
remainVFR for the first few hours of rain as the low levels remain
unsaturated. By Thursday evening the low levels will saturate, and a
low level frontal inversion will steepen, further trapping low level
moisture and increasing the likelihood of ifr CIGS and MVFR to ifr
vsby across western ny with low stratus and ongoing light rain.
Across the north country the airmass will be colder, and likely
support wet snow at the onset Thursday evening including kart with
Friday into Saturday... MVFR/ifr with rain. A chance of
thunderstorms Friday night.
Sunday and Monday...VFR.
Winds will turn easterly by Thursday and southeasterly Friday
as our next storm system passes south of the great lakes. Winds
will reach 15-20 knots with the highest waves in canadian
waters. However, low-end small craft criteria should still be
reached across the western half of lake ontario late Thursday
through Friday. Winds should be out of the northwest following
the passage of the low for the weekend.
Marine... Small craft advisory from 5 pm this afternoon to 5 pm edt
Friday for loz043.
Small craft advisory from 2 pm this afternoon to 5 pm edt
Friday for loz042.
near term... Apffel/hitchcock/zaff
short term... Apffel/rsh
long term... Rsh
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|RCRN6 - 9052058 - Rochester, NY||36 mi||45 min||38°F||1025.4 hPa (-0.5)|
|RPRN6 - Rochester, NY||38 mi||45 min||E 14 G 15||38°F||1026.1 hPa (-0.7)|
|YGNN6 - Niagara Coast Guard , NY||49 mi||45 min||Calm G 1.9||38°F||1025.1 hPa (+0.4)|
Wind History for Buffalo, NY(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Rochester, Greater Rochester International Airport, NY||41 mi||51 min||E 8||10.00 mi||A Few Clouds||36°F||27°F||70%||1025.6 hPa|
Wind History from ROC (wind in knots)
|1 day ago||SW||SW||SW||Calm||W||NW||NW||N||N||N||N||N||N||NE||NE||E||N||Calm||Calm||Calm||E||E||Calm||Calm|
|2 days ago||S||S||S||SW||SW||SW|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help
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Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Northeast EDIT
Wind Forecast for Buffalo, NY (2,6,7,8)(on/off)  Help
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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.