Monday, August26, 2019 L-36.com


Marine Weather and Tides
Rochester, NY

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:26AMSunset 7:57PM Monday August 26, 2019 5:00 AM EDT (09:00 UTC) Moonrise 12:45AMMoonset 4:22PM Illumination 18% Phase: Waning Crescent; Moon at 25 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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LOZ043 Hamlin Beach To Sodus Bay Along Lake Ontario Including Irondequoit Bay- 431 Pm Edt Sun Aug 25 2019
Tonight..Northeast winds 5 to 10 knots becoming southeast. Mainly clear. Waves 2 feet or less.
Monday..Southeast winds 5 to 15 knots becoming east. Sunny in the morning, then becoming partly Sunny. Waves 2 feet or less.
Monday night..East winds 10 to 15 knots becoming south. Mostly cloudy. Waves 2 feet or less.
Tuesday..South winds 10 to 15 knots. A chance of showers. Waves 2 feet or less.
Tuesday night..South winds 5 to 15 knots. Showers likely with a chance of Thunderstorms. Waves 2 feet or less.
Wednesday..Southwest winds 5 to 15 knots. Showers likely with a chance of Thunderstorms during the day. Waves 2 feet or less.
Thursday..Southwest winds 5 to 15 knots. Becoming mainly clear. Waves 2 feet or less.
Friday..Southwest winds 5 to 15 knots becoming west. A chance of showers. Waves 2 feet or less. Winds and waves higher in and near Thunderstorms. The water temperature off rochester is 70 degrees.
LOZ043 Expires:201908260300;;201177 FZUS51 KBUF 252032 NSHBUF Nearshore Marine Forecast National Weather Service Buffalo NY 431 PM EDT Sun Aug 25 2019 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. LOZ043-260300-


7 Day Forecast for Marine Location Near Rochester, NY
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location: 43.17, -77.62     debug


Area Discussion for - Buffalo, NY
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Fxus61 kbuf 260822
afdbuf
area forecast discussion
national weather service buffalo ny
422 am edt Mon aug 26 2019

Synopsis
High pressure drifting slowly east across new england will bring
more dry weather today with near normal temperatures. A warm front
will then move into the area Tuesday morning, followed quickly by a
cold front late Tuesday night and early Wednesday. This will bring a
several rounds of showers and possibly a few isolated thunderstorms.

Mainly dry weather will return Thursday as high pressure builds into
the ohio valley.

Near term through tonight
Ir satellite imagery showing mainly clear skies across the region
early this morning, with just some high thin cirrus drifting across
western ny. Some river valley fog will continue across the western
southern tier in the typical locations through about 9am.

Surface high pressure will continue to drift slowly east across new
england and quebec today. Associated subsidence and dry mid levels
will continue to support dry weather today. Model point soundings
show a layer of moisture around 850mb across western ny, and this
will likely support another round of cumulus stratocumulus
development from about the genesee valley westward with daytime
heating. Areas east of lake ontario will see full sunshine with
little or no moisture left in the low levels. Temperatures will be
very close to average, with highs in the mid to upper 70s at lower
elevations and lower 70s on the hills.

The cumulus stratocumulus will mostly dissipate this evening with the
loss of daytime heating. Mid high clouds will then thicken and lower
from west to east overnight as warm advection and moisture ramp up
ahead of the next system. A warm front will approach western ny very
late tonight. Isentropic upglide and moisture transport supported by
a 40+knot low level jet will support an area of showers just ahead
of the warm front. These showers will enter western ny shortly
before daybreak Tuesday. Given the agreement amongst the global and
high-res model guidance, increased pops to likely very late tonight
and early Tuesday morning west of the genesee valley. The increase
in clouds will keep temperatures milder than recent nights, with
lows in the low to mid 60s on the lake plains of western ny, and 50s
across the southern tier valleys and east of lake ontario. These
lows will likely occur around midnight, with rising temperatures
late tonight as clouds thicken and southerly winds increase.

Short term Tuesday through Wednesday night
A warm front will cross the area on Tuesday, as high pressure
retreats eastward off the new england coast. Strengthening warm
advection along the nose of a 40kt low level jet will move across
western ny Tuesday morning. The best warm air advection lift will be
from the finger lakes west where there will be showers along the
front through the first half of the day, with areas toward the
eastern lake ontario region most likely remaining dry. As the warm
front moves north of the area, believe all areas will see a brief
dry period Tuesday afternoon before showers associated with a cold
front approach western ny late in the evening. A strong sse low
level jet will cause some gusty downslope winds near lake erie off
the chautauqua ridge through early Tuesday afternoon. High
temperatures on Tuesday will be in the mid to upper 70s, with low
70s elsewhere. There will be a noticeable uptick in the humidity,
especially across western ny, as dew points rise into the mid 60s.

A cold front will move into western ny during the second half of
Tuesday night and then slowly move east across the forecast area
during the day Wednesday. The main threat with this front appears to
be a period of heavy rain just ahead of the boundary with pwat
values rising to 1.75-2.00" within a ribbon of deep moisture pooling
just ahead of the cold front on the leading edge of 30-35kt low
level jet. Will keep just the chance for thunder in the forecast as
instability along the front is marginal. Deep southerly flow
combined with increased cloud cover will keep low temperatures
across most areas in the 60s Tuesday night, with some upper 50s
across the higher terrain east of lake ontario. Highs on Wednesday
will be in the mid to upper 70s for most areas, with some low 70s
across the higher terrain.

The front will push east of the area by Wednesday night, with
showers and embedded thunderstorms ending from west to east
Wednesday afternoon and evening. The front will usher in cooler air
aloft with consensus 850mb temperatures dropping to around +8 to +9c
across lake erie Wednesday night, with these values moving over lake
ontario by later Wednesday night into Thursday morning. The
combination of lingering moisture from an upper level trough and the
cooler air off the deck may support limited lake effect enhanced
showers east and northeast of lake erie late Wednesday night.

Long term Thursday through Sunday
Lake effect rain showers may still be supported northeast of lake
erie Thursday morning as 850 mb temperatures continue to remain sub
+10c through 18z with the upper level low continuing to slowly shift
to the east. Diurnal effect will end the lake effect potential by
Thursday afternoon, although a few cold core showers can not be
ruled out over interior sections during peak afternoon heating.

Surface high pressure to our south will slid to the mid-atlantic
region bringing in warmer and drier air Thursday night into Friday.

Thursday night looks dry and this trend may last through the
entirety of Friday, but both the GFS and ECMWF start to stretch a
cold front toward the region by late in the day Friday.

Cold front will move through the region Friday night or Saturday.

Gfs is much more optimistic with mainly dry weather right through
Sunday, while the ECMWF develops a wave along the front with much
better chances for rain. Will trend mote toward the dry GFS at this
point until model consensus comes into better alignment.

Temperatures will not stray much from normal, with highs in the 70s
and lows in the mid to upper 50s through this period.

Aviation 09z Monday through Friday
Mainly clear skies will continue through this morning with just some
thin high cirrus drifting across western ny. Typical southern tier
river valley fog will develop, with local ifr from about 07z-13z.

This is not expected to impact the kjhw terminal.

Once the valley fog burns off in the southern tier,VFR will prevail
today. Model guidance still shows a layer of moisture centered on
850mb across western ny, so expect a good deal of
cumulus stratocumulus development during the midday and afternoon
from the genesee valley westward, with bases around 5k feet.

The cumulus stratocumulus will mostly dissipate this evening, with
mid high clouds then thickening and lowering from west to east ahead
of the next system. A warm front will approach western ny after
about 09z Tuesday, bringing with it an increasing chance of showers.

Cigs vsby will likely remainVFR in most locations through 12z
Tuesday as the low levels remain unsaturated with the initial
arrival of showers. The one exception may be across the higher
terrain of the southern tier, where MVFR CIGS in low stratus may
develop late tonight.

Outlook...

Tuesday through Wednesday... MainlyVFR with some short periods of
MVFR from showers and thunderstorms.

Thursday and Friday... MainlyVFR, some brief MVFR with showers
possible.

Marine
High pressure will continue to drift slowly east across new england
and quebec today. Easterly winds will increase on lake ontario
today, producing choppy conditions on the west half of the lake.

Winds will become sse tonight and increase to 15-20 knots late
tonight and early Tuesday. This will produce choppy conditions on
both lakes, but this wind direction will direct the greater wave
action into canadian waters.

A cold front will then cross the eastern great lakes late Tuesday
night and early Wednesday. Winds will become southwest behind this
cold front, producing choppy conditions at the east end of lakes
erie and ontario.

Buf watches warnings advisories
Ny... None.

Marine... None.

Synopsis... Hitchcock
near term... Hitchcock
short term... Jm
long term... Jm tma
aviation... Hitchcock
marine... Hitchcock


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCRN6 - 9052058 - Rochester, NY 7 mi49 min 57°F 1022.3 hPa
RPRN6 - Rochester, NY 7 mi61 min S 2.9 G 5.1 63°F
45012 - Lake Ontario Buoy - 20NM North Northeast of Rochester, NY 33 mi31 min SSE 9.7 G 12 69°F 71°F1023 hPa58°F
OLCN6 - Olcott Harbor, NY 59 mi61 min SSE 6 G 7 62°F 1023.4 hPa (-0.3)

Wind History for Oswego, NY
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Rochester, Greater Rochester International Airport, NY4 mi2.1 hrsN 010.00 miA Few Clouds59°F55°F90%1023.8 hPa

Link to 5 minute data for KROC

Wind History from ROC (wind in knots)
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Last 24hr--SW3--CalmSW4--3E7--SE7--NE9
G15
--E7E10SE6E7E6E5SE3------Calm
1 day ago--CalmCalmNW3N4NE10NE8NE9NE8NE6N9NE9
G19
NE9NE10NE9NE8NE8E5------W3----
2 days ago----SW3CalmCalm--N7NE9NE8N8NE11N8
G16
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N7N9N5NW3NW3--NW4----NE6

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Buffalo, NY (5,6,7,8)
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Ground Weather Radar Station Buffalo, 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.