Saturday, January25, 2020
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Marine Weather and Tides
Biddeford, ME

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
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.

Sunrise 7:03AMSunset 4:44PM Saturday January 25, 2020 10:06 AM EST (15:06 UTC) Moonrise 8:46AMMoonset 6:28PM Illumination 0% Phase: New Moon; Moon at 1 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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ANZ154 Coastal Waters From Cape Elizabeth, Me To Merrimack River, Ma Out 25 Nm- 720 Am Est Sat Jan 25 2020
.gale warning in effect from 7 pm est this evening through Sunday morning...
Today..E winds 10 to 15 kt, increasing to 15 to 20 kt this afternoon. Gusts up to 30 kt. Seas 2 to 4 ft, building to 4 to 7 ft this afternoon. A chance of rain this afternoon with vsby 1 to 3 nm.
Tonight..E winds 20 to 30 kt, becoming se after midnight. Gusts up to 40 kt. Seas 8 to 11 ft. Rain. Vsby 1 to 3 nm.
Sun..W winds 10 to 20 kt with gusts up to 25 kt. Seas 7 to 10 ft, subsiding to 5 to 8 ft in the afternoon.
Sun night..SW winds 15 to 20 kt with gusts up to 25 kt. Seas 4 to 7 ft.
Mon..W winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 6 ft.
Mon night..NW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft.
Tue..N winds 5 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Tue night..N winds 5 to 10 kt with gusts up to 20 kt. Seas around 2 ft.
Wed..N winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Wed night..N winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
ANZ100 720 Am Est Sat Jan 25 2020
Synopsis for stonington me to merrimack river ma out to 25 nm.. An area of low pressure will pass along the coast toight and early Sunday likely accompanied by a period of southeasterly gale force winds and moderate to heavy rainfall. High pressure will gradually build across the waters early next week. &&


7 Day Forecast for Marine Location Near Biddeford, ME
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location: 43.29, -70.17     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 251216 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 716 AM EST Sat Jan 25 2020

SYNOPSIS. Low pressure will approach from the west today and cross the region tonight into Sunday with heavy rain likely for at least a few hours across lower elevations. In the mountains we expect a mix of snow, sleet, and freezing rain. Numerous rain and snow showers are expected in association with an upper level low on Sunday, mainly in the mountains. Thereafter, fair weather and seasonable temperatures are expected for the upcoming week.

NEAR TERM /TODAY/. 715 AM Update . General ESTF update according to latest observations. Of note, decreased drizzle and freezing drizzle a bit this morning which nearly eliminates patchy glaze threat before the start of the winter weather advisory later this afternoon. Also adjusted temperatures with slightly warmer temperatures over the coastal plain and slightly cooler temperatures across the upper Connecticut River Valley where sheltered valleys were able to radiate out overnight.

Previously . This morning, a ridge of high pressure departs to the east in response to an approaching closed low moving up the Ohio Valley today. Onshore flow continues to moisten the column in the low levels which should allow for some drizzle to form this morning, especially in the east-facing upslopes and foothills of interior western Maine and New Hampshire. There is a slight chance of freezing drizzle where cooler pockets of air reside in sheltered valleys, however moistening upper levels may allow for some seeder-feeder nucleation so went with a slight chance of light snow as well. Overall impacts ought to be minimal with temperatures rising above freezing for most areas by noon. Flow picks up by mid-day mixing out any drizzle . and the column gradually saturates this afternoon with showers starting to enter the forecast area from the southwest.

SHORT TERM /TONIGHT/. Tonight, a trough axis associated with the aforementioned closed upper-level low swings across New England with a band of moderate to heavy precipitation accompanying. At the surface, an occluded low wraps up into the lower Great Lakes region beneath the upper level feature with cyclogenesis at its triple point as it reaches southeast New England. Most impacts with the crossing system come as a direct result of strong SErly low- level jet associated with strong synoptic ascent in the right entrance region of a strengthening jet on the downstream side of the upper level trough.

For timing . Models are in good agreement that the leading edge of the band arrives in southwest New Hampshire by 00Z and moves NEward across the forecast area and into central Maine after midnight. By dawn, the band of precipitation ought to be out of the forecast area with a few showers in its wake especially over the higher terrain.

For wind . hires guidance paints an 850 mb jet of 65-75 kts out of the southeast. While gales are expected over the waters and bays, over land the strong jet also leads to a nice temperature inversion even as the surface climbs into the 40s along the coast and several miles inland. BUFKIT soundings support wind gusts into the 30-35 kt range along the immediate coast, but further inland gusts should stay 15-20 kts with the obvious transition zone between.

For QPF . strong moisture convergence and coastal frontogenesis resulting from the strong jet perpendicular to the coastline, along with PWAT in excess of 1.0" along the coast (around 3 standard deviations above normal for this time of year), will lead to fairly high rainfall rates for a few hours along the coast. A Flood Watch has been posted for portions of the coastal plain in extreme SE NH and extreme SW ME. More details in the hydrology section below.

For precipitation type . our 00Z KGYX sounding indicated a warm nose of +2C at 850 mb. Model guidance suggests the warm sector aloft expands northward through the remainder of the area while not necessarily growing warmer. Thus, while rain is expected for the coastal plain with temperatures in the 30s and low-40s, a messy mix of wet snow, sleet, and some freezing rain (especially over higher peaks) is expected over the mountains and parts of the Maine foothills. Thus a winter weather advisory has been posted here.

Conditions gradually improve from southwest to northeast tomorrow morning with the dry slot cutting in behind the band of precipitation.

LONG TERM /SUNDAY THROUGH FRIDAY/. Upper level low pressure will traverse across the forecast area on Sunday. As a result numerous snow showers are expected in the mountains, with higher elevations experiencing a few inches of accumulation. Lower elevations may see an inch or two but will be fighting boundary layer temperatures above freezing.

After Sunday, deep layer cyclonic flow will allow for snow showers in the mountains to continue but at lesser intensity and lesser coverage. Fair weather is then expected for much of the rest of next week.

AVIATION /12Z SATURDAY THROUGH WEDNESDAY/. Short Term /Through Saturday Night/ . Widespread MVFR ceilings today except for NW of the mountains with moist onshore flow. Patchy drizzle and mist are possible but guidance has backed off visibility restrictions today. Strengthening NErly to Erly flow strengthens this afternoon, then turns southeasterly this evening. A broad band of moderate to heavy precipitation will cross the region 00Z-12Z tonight with rain expected at all sites, perhaps a mix up at HIE. Expect widespread IFR/LIFR with this band and gusty winds to 35kts along the coast with SErly LLWS possible across southern NH and coastal ME. Conditions begin to improve around dawn tomorrow.

Long Term . An upper level low will bring periodic snow showers and associated MVFR conditions to the mountains Sunday into Monday. Otherwise, VFR conditions are expected elsewhere which should continue through the bulk of the upcoming week.

MARINE. Short Term /Through Saturday Night/ . Winds and waves gradually pick up today, to SCA levels this afternoon. Tonight, a strong low level jet crosses SW to NE with gale force winds out of the southeast. SCAs linger Sunday.

Long Term . A weak frontal boundary will cross the waters Monday into Monday night. A fresh breeze will gradually ease on Tuesday. Broad ridging will slowly build across the waters from Tuesday through the end of the week. Conditions are expected to be mainly below SCA thresholds Mon-Fri with SCA conditions diminishing Sunday through Sunday night.

HYDROLOGY. Heavy rainfall rates are expected on the coastal plain tonight which will be enhanced by the coastal front as well as 1" PWATS being delivered on a 70+ KT southeasterly low level jet. Most mesoscale guidance indicate that 1 to perhaps 1.5 inches of rain will fall in a 3-6 hour period along and just west of the coastal front. Therefore a flood watch has been issued as snowbanks and clogged storm drains could result in flooding of roads and low lying areas as the runoff may not have anywhere to go in some areas.

TIDES/COASTAL FLOODING. Some beach erosion and splash-over will be possible with the Sunday morning high tides. However, due to relatively low astronomical values, widespread minor coastal flooding is not expected.

GYX WATCHES/WARNINGS/ADVISORIES. ME . Winter Weather Advisory from 4 PM this afternoon to 7 AM EST Sunday for MEZ012>014. Flood Watch from 7 PM EST this evening through late tonight for MEZ018-019-023>026. Winter Weather Advisory from 7 PM this evening to 7 AM EST Sunday for MEZ007>009. NH . Winter Weather Advisory from 4 PM this afternoon to 7 AM EST Sunday for NHZ001>005. Flood Watch from 7 PM EST this evening through late tonight for NHZ010-013-014. MARINE . Gale Warning from 7 PM this evening to 7 AM EST Sunday for ANZ150>154.



NEAR TERM . Casey SHORT TERM . Casey LONG TERM . Ekster


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44007 - PORTLAND 12 NM Southeast of Portland,ME 16 mi77 min ESE 12 G 16 38°F 40°F3 ft1027.2 hPa (-0.8)31°F
44030 - Buoy B0102 - Western Maine Shelf 16 mi123 min E 14 G 16 4 ft1027.7 hPa
WEXM1 - Wells Reserve, ME 20 mi67 min ENE 6 38°F 32°F
WELM1 - 8419317 - Wells, ME 21 mi49 min ESE 11 G 14
CASM1 - 8418150 - Portland, ME 26 mi55 min 38°F 38°F
44073 27 mi123 min E 14 G 16 41°F 42°F
CMLN3 32 mi183 min NE 11 37°F
IOSN3 - Isle of Shoals, NH 33 mi67 min ENE 19 G 21 39°F 1025.4 hPa (-1.2)35°F
44098 - Jeffrey's Ledge, NH (160) 34 mi29 min 44°F4 ft
BGXN3 - Great Bay Reserve, NH 38 mi82 min ENE 6 39°F 1026 hPa32°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME27 mi76 minNE 710.00 miOvercast37°F30°F76%1028.2 hPa

Link to 5 minute data for KPWM

Wind History from PWM (wind in knots)
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Last 24hrNE8NE8NE4NE5NE9E8NE7NE4NE4NE9NE7NE6NE6NE6NE6NE4CalmCalmCalmNE6NE7NE8NE7E9
1 day agoCalmCalmCalmNW4CalmS3CalmCalmN3CalmN3W3NW3NW3CalmCalmCalmN4NW3N4N4N4N5NE8
2 days agoW4CalmNE3CalmE4SE7S3CalmCalmS3S6SW4SW4SW6SW4SW5W5S4NW4SW3CalmS3CalmCalm

Tide / Current Tables for Cape Porpoise, Maine
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Cape Porpoise
Click for Map
Sat -- 05:20 AM EST     0.45 feet Low Tide
Sat -- 07:04 AM EST     Sunrise
Sat -- 07:47 AM EST     Moonrise
Sat -- 11:32 AM EST     9.62 feet High Tide
Sat -- 04:43 PM EST     Sunset
Sat -- 05:29 PM EST     Moonset
Sat -- 05:58 PM EST     -0.47 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.37.25.33.11.40.50.724.16.58.49.59.58.46.43.91.60.1-0.50.11.84.16.27.8

Tide / Current Tables for Wood Island Harbor, Maine
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Wood Island Harbor
Click for Map
Sat -- 05:02 AM EST     0.45 feet Low Tide
Sat -- 07:04 AM EST     Sunrise
Sat -- 07:47 AM EST     Moonrise
Sat -- 11:22 AM EST     9.72 feet High Tide
Sat -- 04:42 PM EST     Sunset
Sat -- 05:29 PM EST     Moonset
Sat -- 05:40 PM EST     -0.48 feet Low Tide
Sat -- 11:58 PM EST     8.51 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.36.94.82.61.10.512.54.878.89.79.58.25.93.31.1-0.2-0.40.52.44.76.78

Weather Map
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wmap_A
GEOS 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Gray/Portland, ME (10,2,3,4)
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Ground Weather Radar Station Portland, ME
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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 numerous 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.