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Marine Weather and Tides
Version 3.4 |
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. 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 7:01AM | Sunset 4:09PM | Tuesday December 10, 2019 1:32 PM EST (18:32 UTC) | Moonrise 4:20PM | Moonset 6:08AM | Illumination 99% |  |
ANZ154 Coastal Waters From Cape Elizabeth, Me To Merrimack River, Ma Out 25 Nm- 944 Am Est Tue Dec 10 2019
.small craft advisory in effect through this evening...
This afternoon..SW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Showers likely.
Tonight..W winds 15 to 20 kt, becoming nw 10 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 7 ft. Scattered showers in the evening, then a chance of snow and rain after midnight with vsby 1 to 3 nm.
Wed..NW winds 5 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 3 to 5 ft. A chance of snow in the morning with vsby 1 to 3 nm.
Wed night..W winds 10 to 20 kt, increasing to 15 to 25 kt after midnight. Seas 4 to 6 ft.
Thu..NW winds 15 to 25 kt, diminishing to 5 to 15 kt in the afternoon. Seas 3 to 5 ft.
Thu night..NW winds 5 to 10 kt, becoming sw after midnight. Seas around 2 ft.
Fri..S winds 5 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..S winds 10 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. Rain likely.
Sat..S winds 10 to 20 kt with gusts up to 30 kt. Seas 7 to 10 ft. Rain likely.
Sat night..W winds 5 to 15 kt with gusts up to 25 kt. Seas 7 to 10 ft. A chance of showers.
.small craft advisory in effect through this evening...
This afternoon..SW winds 15 to 20 kt with gusts up to 30 kt. Seas 5 to 8 ft. Showers likely.
Tonight..W winds 15 to 20 kt, becoming nw 10 to 20 kt after midnight. Gusts up to 30 kt. Seas 4 to 7 ft. Scattered showers in the evening, then a chance of snow and rain after midnight with vsby 1 to 3 nm.
Wed..NW winds 5 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt in the afternoon. Seas 3 to 5 ft. A chance of snow in the morning with vsby 1 to 3 nm.
Wed night..W winds 10 to 20 kt, increasing to 15 to 25 kt after midnight. Seas 4 to 6 ft.
Thu..NW winds 15 to 25 kt, diminishing to 5 to 15 kt in the afternoon. Seas 3 to 5 ft.
Thu night..NW winds 5 to 10 kt, becoming sw after midnight. Seas around 2 ft.
Fri..S winds 5 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..S winds 10 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. Rain likely.
Sat..S winds 10 to 20 kt with gusts up to 30 kt. Seas 7 to 10 ft. Rain likely.
Sat night..W winds 5 to 15 kt with gusts up to 25 kt. Seas 7 to 10 ft. A chance of showers.
ANZ100 944 Am Est Tue Dec 10 2019
Synopsis for stonington me to merrimack river ma out to 25 nm.. Winds and seas gradually diminish through today, then a cold front crosses this evening. Some snow, mainly light, is possible over the waters tonight into Wednesday morning before clearing. Thereafter, a potentially potent low pressure system will approach Friday and may affect the waters over the weekend. &&
Synopsis for stonington me to merrimack river ma out to 25 nm.. Winds and seas gradually diminish through today, then a cold front crosses this evening. Some snow, mainly light, is possible over the waters tonight into Wednesday morning before clearing. Thereafter, a potentially potent low pressure system will approach Friday and may affect the waters over the weekend. &&
7 Day Forecast for Marine Location Near Kittery, ME
Hourly EDIT Helplocation: 43.08, -70.75 debug
Area Discussion for - Gray/Portland, ME
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS61 KGYX 101450 AAA AFDGYX
Area Forecast Discussion . UPDATED National Weather Service Gray ME 950 AM EST Tue Dec 10 2019
SYNOPSIS. A cold front will approach from the west today with a chance of showers. However, the main story will be temperatures well above normal with highs in the 50s at most locations. Cold temperatures return tonight with some light snow likely late tonight into Wednesday for southern New Hampshire and the coastal plain of Maine. An active weather pattern looks to continue this weekend with low pressure moving up the coast delivering another chance of heavy rainfall.
NEAR TERM /UNTIL 6 PM THIS EVENING/. F-gen ahead of the approaching cold front is helping to keeping a band of showers fairly focused this morning. SW flow aloft is transporting this into SW parts of the forecast area. I have bumped PoP up about a category in most places to highlight more in the way of showery wx today that previous forecast. Showers will be light . but I do expect many areas to see some measurable today. Otherwise no major changes.
Previous discussion . Mainly dry conditions are expected today behind a departing shortwave trough contributing to synoptic subsidence along with dry intrusion aloft. Meanwhile a long wave trough digs and rotates through the Plains into the Great Lakes region today, strengthening a 300 mb jet to 170+ kts over the northeast. At the surface, warm advection continues amid southwest flow, to near-record values over some parts of southern NH and coastal Maine. Late this afternoon into the evening, a lagging surface cold front crosses with an uptick in PoP mainly over the mountains. Cold advection marks a change in airmass behind the front with some showers switching over to snow before drying out.
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/. Update . Early look at the 10.12z NWP shows continued evidence of deep dry air below saturated layer aloft tonight. Depending on the model lift is generally thru or above the snow growth zone . so I expect snow to be generated. But the dry air will help evaporate that . and Wly flow will help advect that snow Ewd as it falls. To me that screams a sharp NW cut off to snow accumulation . and likely very light totals if any at all in our Srn and coastal zones. I have really trimmed back snow amounts to generally less than an inch thru Wed morning.
Previous discussion . The aforementioned strong jet aloft NEward allowing broad synoptic ascent and favorable bands of FGEN and deformation to develop along the eastern seaboard tonight into Wednesday morning. With a cool airmass now in place, precipitation that does fall would fall as snow - although it would be tough to accumulate with recent warm, wet conditions. In spite of very strong forcing coinciding with DGZ humidity in the upper levels, dry air in the mid- and low- levels will inhibit at least a portion of QPF from reaching the ground, so overall expected a light snowfall evening on the order of 1-2 inches over southern NH and along the coast of Maine. One caveat to the minor event is that snow could impact the morning commute on Wednesday with strong forcing fully capable of producing a burst of snow in an organized band. An approaching short wave trough from the west pushes any banded snow off shore by the evening, as will strengthening surface high pressure. Continued cold advection limits temperatures to the 20s over the north and in much of western Maine, low- 30s across the south.
LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/. Strong high pressure at the surface will move across the forecast area Wednesday night through Thursday. This should allow for colder than normal temperatures. The pattern remains quite progressive and most of the 00z guidance agrees that the next system to affect northern New England will come from the southern stream and displace our cold air mass quite quickly. So while we may have a brief period of mixed precipitation at the onset late Friday or Friday night, the vast majority of the forecast area is expected to see rain, heavy at times, on Saturday. A brief period of strong winds will be possible on the coast as well. Thereafter, snow showers are possible with the passage of a short wave trough on Sunday along with gusty NW winds.
AVIATION /15Z TUESDAY THROUGH SATURDAY/. Short Term /Through Wednesday/ . TAF sites see gradual improvements this morning with prevailing VFR visibilities and ceilings improving from southwest to northeast, from IFR to MVFR. LLWS also diminishes this morning as a LLJ continues to track away from the region. A brief period of IFR could develop again in the pre- dawn, but without confidence to include in the forecast. Today, MVFR ceilings prevail while occasionally scattering to VFR with unrestricted visibilities. A cold front crosses this evening, shifting southwest winds northwesterly with a few 15-20kt gusts, and improvements to VFR to follow except for in upslope areas.
Long Term . VFR conditions outside of the mountains are expected Wednesday night into Thursday morning. VFR for all for the balance of Thursday through Friday. Conditions quickly become IFR Saturday in rain or mixed precipitation with LLWS a possibility.
MARINE. Short Term /Through Wednesday/ . The core of strong winds responsible for sporadic gusts last evening has moved off to the east with diminishing winds this morning over the waters. SCA winds and seas continue through today with seas possibly continuing into Wednesday before winding down, before a cold front enters from the west.
Long Term . Strong cold air advection is expected on the waters Wednesday night and will result in SCA conditions. Some low-end gales will be possible for a brief time as well. SCA conditions or gales will be possible over the weekend in association with low pressure moving up the east coast.
HYDROLOGY. Warm temperatures combined with rain will result in runoff and modest rises on area rivers. While snow loss is expected, it is unlikely the entire snowpack will go over to runoff which will spare most locations from flooding. The most likely areas for minor flooding include southern New Hampshire with the Warner River at Davisville and the Suncook at North Chichester expected to near action stage. Across the northern mountains, the snow density is lower, as are the QPF amounts and the combination will likely result in most of the rain being absorbed into the snowpack with low chance of any of the rivers meeting action stage.
GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . Small Craft Advisory until 10 PM EST this evening for ANZ150>154.
NEAR TERM . Legro
Weather Reporting Stations
EDIT (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 |
| CMLN3 | 3 mi | 149 min | W 9.9 | |||||
| BGXN3 - Great Bay Reserve, NH | 4 mi | 48 min | SW 5.1 | 55°F | 1005 hPa | 50°F | ||
| IOSN3 - Isle of Shoals, NH | 10 mi | 33 min | SW 19 G 20 | 56°F | 1004 hPa (-2.1) | 52°F | ||
| 44030 - Buoy B0102 - Western Maine Shelf | 18 mi | 89 min | S 12 G 16 | 48°F | 8 ft | 1003.6 hPa | ||
| WELM1 - 8419317 - Wells, ME | 19 mi | 51 min | WSW 7 G 12 | 57°F | 46°F | 1004.3 hPa | ||
| WEXM1 - Wells Reserve, ME | 21 mi | 33 min | SSW 7 | 57°F | 51°F | |||
| 44098 - Jeffrey's Ledge, NH (160) | 36 mi | 25 min | 47°F | 9 ft | ||||
| 44029 - Buoy A0102 - Mass. Bay/Stellwagen | 40 mi | 89 min | SSW 9.7 G 12 | 50°F | 46°F | 5 ft | 1003.6 hPa | |
| 44007 - PORTLAND 12 NM Southeast of Portland,ME | 45 mi | 43 min | SSW 16 G 18 | 49°F | 47°F | 8 ft | 1003.2 hPa (-2.3) | 49°F |
| CASM1 - 8418150 - Portland, ME | 48 mi | 57 min | 53°F | 43°F |
Wind History for Wells, ME
(wind in knots) EDIT (on/off) Help| 2 PM | 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 | |
| Last 24hr | S | SW G25 | S G22 | SW G28 | SW | S G17 | S G18 | S G12 | SW | SW G15 | SW | SW G14 | SW G14 | SW G14 | SW G13 | SW G12 | SW G9 | SW G12 | SW G10 | SW G14 | SW G13 | SW G15 | SW G15 | SW G13 |
| 1 day ago | S | SW | SW | SW | SW G13 | SW G17 | SW G14 | SW G15 | SW G8 | SW G10 | SW | SW G9 | SW | SW G10 | SW G10 | SW | SW | W | -- | -- | NW | NE | E | NE |
| 2 days ago | NW G13 | NW G13 | NW G13 | NW G10 | NW G8 | W | NW | NW G9 | NW | NW | NW | NW | W | NW | NW | W G7 | NW | NW | N | W | SW | W | SW | SW |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Pease Air Force Base / Portsmouth, NH | 4 mi | 97 min | SW 9 | 10.00 mi | Overcast | 56°F | 50°F | 81% | 1004.6 hPa |
| Rochester - Skyhaven Airport, NH | 16 mi | 42 min | no data | 10.00 mi | Overcast | 55°F | 48°F | 80% | 1003.7 hPa |
| Sanford, Sanford Regional Airport, ME | 22 mi | 37 min | SW 6 | 10.00 mi | Overcast | 55°F | 50°F | 83% | 1004.6 hPa |
Link to 5 minute data for KPSM
Wind History from PSM (wind in knots)
| 2 PM | 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 | |
| Last 24hr | SE | S | S | S | S | S | S | S | S | S | S | SW | SW | SW G17 | SW G17 | SW G16 | SW | SW | S | SW | SW | SW | SW | SW |
| 1 day ago | S | S | S | S | S | S | S | SW | S | SW | SW | S | SW | SW | SW | Calm | SW | Calm | Calm | E | Calm | Calm | E | |
| 2 days ago | NW | W | NW | NW | W | W | W | W | W | W | W | W | W | W | W | W | W | W | W | Calm | SW | S | Calm | SW |
Tide / Current Tables for Portsmouth, Portsmouth Harbor, New Hampshire
EDIT Weekend mode (on/off) (on/off) Help One Week of DataPortsmouth
Click for Map
Tue -- 03:27 AM EST 0.80 feet Low Tide
Tue -- 05:08 AM EST Moonset
Tue -- 07:03 AM EST Sunrise
Tue -- 09:46 AM EST 8.31 feet High Tide
Tue -- 03:19 PM EST Moonrise
Tue -- 04:02 PM EST 0.11 feet Low Tide
Tue -- 04:07 PM EST Sunset
Tue -- 10:18 PM EST 7.51 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 03:27 AM EST 0.80 feet Low Tide
Tue -- 05:08 AM EST Moonset
Tue -- 07:03 AM EST Sunrise
Tue -- 09:46 AM EST 8.31 feet High Tide
Tue -- 03:19 PM EST Moonrise
Tue -- 04:02 PM EST 0.11 feet Low Tide
Tue -- 04:07 PM EST Sunset
Tue -- 10:18 PM EST 7.51 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| 5.1 | 3.3 | 1.7 | 0.9 | 0.9 | 1.8 | 3.4 | 5.3 | 7 | 8.1 | 8.3 | 7.6 | 6.1 | 4 | 2 | 0.6 | 0.1 | 0.5 | 1.7 | 3.5 | 5.4 | 6.8 | 7.5 | 7.3 |
Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
EDIT (on/off) Help One Week of DataPortsmouth Harbor Entrance
Click for Map
Tue -- 01:31 AM EST -1.66 knots Max Ebb
Tue -- 05:08 AM EST Moonset
Tue -- 05:20 AM EST 0.00 knots Slack
Tue -- 07:03 AM EST Sunrise
Tue -- 07:22 AM EST 1.26 knots Max Flood
Tue -- 11:14 AM EST -0.00 knots Slack
Tue -- 02:03 PM EST -1.91 knots Max Ebb
Tue -- 03:19 PM EST Moonrise
Tue -- 04:07 PM EST Sunset
Tue -- 06:04 PM EST 0.00 knots Slack
Tue -- 07:51 PM EST 1.00 knots Max Flood
Tue -- 11:34 PM EST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Tue -- 01:31 AM EST -1.66 knots Max Ebb
Tue -- 05:08 AM EST Moonset
Tue -- 05:20 AM EST 0.00 knots Slack
Tue -- 07:03 AM EST Sunrise
Tue -- 07:22 AM EST 1.26 knots Max Flood
Tue -- 11:14 AM EST -0.00 knots Slack
Tue -- 02:03 PM EST -1.91 knots Max Ebb
Tue -- 03:19 PM EST Moonrise
Tue -- 04:07 PM EST Sunset
Tue -- 06:04 PM EST 0.00 knots Slack
Tue -- 07:51 PM EST 1.00 knots Max Flood
Tue -- 11:34 PM EST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 | 3 pm | 4 pm | 5 pm | 6 pm | 7 pm | 8 pm | 9 pm | 10 pm | 11 pm |
| -1 | -1.6 | -1.6 | -1.3 | -1 | -0.3 | 0.6 | 1.2 | 1.2 | 0.9 | 0.6 | 0.2 | -0.7 | -1.6 | -1.9 | -1.8 | -1.5 | -1 | -0.1 | 0.8 | 1 | 0.8 | 0.6 | 0.3 |
Weather Map
(on/off) Help Weather Map
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 (13,3,4,5)
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Ground Weather Radar Station Portland, ME
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