Thursday, September19, 2019 L-36.com


Marine Weather and Tides
South Portland, ME

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 6:23AMSunset 6:46PM Thursday September 19, 2019 2:47 PM EDT (18:47 UTC) Moonrise 9:43PMMoonset 11:34AM Illumination 69% Phase: Waning Gibbous; Moon at 20 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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ANZ153 Casco Bay- 1005 Am Edt Thu Sep 19 2019
.small craft advisory for hazardous seas in effect from Friday afternoon through late Friday night...
Today..N winds around 5 kt, becoming S this afternoon. Seas 1 to 2 ft.
Tonight..SW winds up to 10 kt, becoming W after midnight. Seas 2 to 3 ft.
Fri..NW winds around 5 kt, becoming W in the afternoon. Seas 3 to 5 ft.
Fri night..NW winds 5 to 10 kt. Seas 3 to 5 ft.
Sat..NW winds around 5 kt, becoming sw around 5 kt in the afternoon. Seas 1 to 2 ft.
Sat night..SW winds around 5 kt. Seas 1 foot or less.
Sun..S winds 5 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Sun night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Mon..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.
Mon night..W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
ANZ100 1005 Am Edt Thu Sep 19 2019
Synopsis for stonington me to merrimack river ma out to 25 nm.. High pressure will hold over the waters through today providing for tranquil conditions on the waters. SWells from distant humberto will begin to arrive Friday. A cold frontal system will approach late in the weekend into early next week and pass across the region Tuesday. &&


7 Day Forecast for Marine Location Near South Portland, ME
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location: 43.65, -70.3     debug


Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 191619 aac
afdgyx
area forecast discussion... Updated
national weather service gray me
1219 pm edt Thu sep 19 2019

Synopsis
High pressure will be in firm control across our region through
this weekend with increasingly warm temperatures late this week
and weekend. High surf conditions are expected at ocean beaches
Friday as swells from distant hurricane humberto roll on in. A
cold front will approach on Monday and Tuesday with a chance of
showers as it moves through.

Near term until 6 pm this evening
1010 am update: minor changes to match temperature dewpoint
trends with forecast on track. No changes needed to afternoon
high temperatures with full Sun expected this afternoon.

845 am update: dropped freeze warnings and frost advisories as
temperatures begin their quick climb this am.

Otherwise... Matched morning observational trends.

635 am update... Little change to the going forecast. Frost and
freeze headlines remain as is til 9 am. Otherwise, valley fog
will lift in a few hours yielding a sunny day.

Previously...

a frosty early morning will give way to plentiful sunshine
today with highs within 5 degrees of 70f. Light winds will go
onshore at the coast during the afternoon hours.

Short term 6 pm this evening through 6 pm Friday
High pressure ridging will continue over the forecast area
tonight and Friday with increasingly warmer temperatures as a
westerly return flow begins to take shape. Radiational cooling
with valley fog will once again occur tonight. However,
temperatures are expected to be warmer. Even still, patchy frost
will be possible at the best radiators. A few more clouds are
expected on Friday, but mostly sunny skies will be the rule with
temperatures rising well into the 70s. Long period swells
emanating from humberto will begin to affect the coastline on
Friday. As a result, a high surf advisory has been issued.

Long term Friday night through Wednesday
Warm, moist air mass will be in place across the region this
weekend beneath an upper level ridge. Should see temperatures
gradually warming through Sunday... Or possibly Monday. Highs in
the 80s will become increasingly common. With high dewpoints
around, overnight lows will be quite balmy and valley fog will
be likely especially Saturday morning.

The upper ridge moves east while a trough tracks east across
canada and the northern tier of the us early next week. The
canadian trough will sling a cold front through northern new
england on Monday. Much of the forcing for more widespread
rainfall will be to the north, but with the front pushing
through we can expect some showers. ECMWF is a bit slower with
the front and keeps the warm, humid conditions around for one
more day while lingering the rain into Monday night and Tuesday
with a sharper second trough crossing the great lakes. Ecmwf
seems to be the outlier in this case, but did maintain some rain
chances Monday night into Tuesday in case this slower scenario
unfolds. It will be cooler and drier behind the front next week,
with temperatures dropping closer to normal, but still perhaps a
few degrees above normal.

Aviation 18z Thursday through Monday
Short term...

summary: high pressure will remain over the terminals through early
Friday before a weak trough passes through the region late Friday
and Friday night.

Restrictions:VFR through Friday night outside of fog development at
hie leb. At these sites... Vlifr lifr possible for a few hours
surrounding daybreak both tonight and again Friday night.

Winds: winds turning onshore at coastal sites while remaining light
and variable elsewhere. Winds will go calm overnight before
becoming northwesterly 5-10kts on Friday. Winds diminish to
calm light-variable Friday night.

Lightning: no lightning is expected through Friday night.

Llws: no llws is expected through Friday night.

Long term...VFR conditions expected through the weekend except
for early morning valley fog. A cold front arriving on Monday
will bring some showers and possibly MVFR conditions at times.

Marine
Short term... Quiet weather on the waters expected today and
tonight with conditions below SCA thresholds. Long period swells
of 5 to 10 feet are expected to move into the waters early
Friday morning and persist through the day.

Long term... High pressure gradually shifts east this weekend
with light winds becoming south to southwesterly on Sunday and
Monday. Could see a few gusts to 25kt as these winds pick up
ahead of the cold front on Monday. Seas will be rather high in
long period swells emanating from humberto but should be
decreasing on Saturday.

Tides coastal flooding
Various wave models are in good agreement with 6-10 foot long
period swells moving into the coastal waters by Friday morning
and persisting through the day. These are attributable to
distant hurricane humberto. The result will likely be large
breaking waves at ocean beaches with the attendant high threat
for strong rip currents. The swells are forecast to gradually
subside Friday night and Saturday.

Gyx watches warnings advisories
Me... High surf advisory from 8 am to 10 pm edt Friday for
mez023>027.

Nh... High surf advisory from 8 am to 10 pm edt Friday for nhz014.

Marine... Small craft advisory for hazardous seas from noon Friday to 2
am edt Saturday for anz153.

Small craft advisory for hazardous seas from 4 am Friday to 2
am edt Saturday for anz150-152-154.

Near term... Arnott
aviation... Arnott


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 3 mi48 min 61°F 59°F
44007 - PORTLAND 12 NM Southeast of Portland,ME 12 mi58 min S 5.8 G 7.8 59°F 61°F2 ft1025.9 hPa (-1.5)42°F
WEXM1 - Wells Reserve, ME 25 mi48 min ESE 4.1 63°F 41°F
WELM1 - 8419317 - Wells, ME 27 mi48 min S 7 G 8 62°F 61°F1026.7 hPa (-1.1)
44030 - Buoy B0102 - Western Maine Shelf 33 mi164 min NNE 3.9 G 3.9 58°F 62°F3 ft1027.3 hPa
CMLN3 45 mi164 min SE 11

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME1 mi1.9 hrsNW 410.00 miFair67°F41°F39%1026.5 hPa

Link to 5 minute data for KPWM

Wind History from PWM (wind in knots)
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Last 24hrNE7E4NE4E3S3CalmCalmSE3CalmW3W5W3W4NW4CalmW4W4NW4NW3NW4NW4CalmNW4S4
1 day agoN10NW7N8NE5N5NE5NE7NE9NE9N7N5N5NW7N6N6N6N8N9NE9NE8NE10NE8E8NE5
2 days agoNW9NW7NW4NW7NW8NW6W4NW5W4W6W6W4W7W6W4W5NW6NW5N10N11NE9
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Tide / Current Tables for Fore River, Maine
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Fore River
Click for Map
Thu -- 02:50 AM EDT     8.85 feet High Tide
Thu -- 06:24 AM EDT     Sunrise
Thu -- 08:51 AM EDT     1.02 feet Low Tide
Thu -- 11:33 AM EDT     Moonset
Thu -- 03:03 PM EDT     9.32 feet High Tide
Thu -- 06:44 PM EDT     Sunset
Thu -- 09:20 PM EDT     0.69 feet Low Tide
Thu -- 09:42 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.27.28.58.88.26.84.92.81.411.73.15.17.28.79.38.97.65.73.51.70.80.92

Tide / Current Tables for Cow Island, Maine
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Cow Island
Click for Map
Thu -- 02:47 AM EDT     8.85 feet High Tide
Thu -- 06:24 AM EDT     Sunrise
Thu -- 08:49 AM EDT     1.02 feet Low Tide
Thu -- 11:33 AM EDT     Moonset
Thu -- 03:00 PM EDT     9.32 feet High Tide
Thu -- 06:44 PM EDT     Sunset
Thu -- 09:18 PM EDT     0.69 feet Low Tide
Thu -- 09:41 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.37.38.58.88.26.84.82.81.411.73.25.27.38.89.38.87.55.63.41.60.70.92

Weather Map
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wmap_A
GEOS Local Image of Northeast    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 Gray/Portland, ME (14,3,4,5)
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Ground Weather Radar Station Portland, ME
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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.