Sunday, January19, 2020
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Marine Weather and Tides
Portsmouth, NH

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 7:07AMSunset 4:39PM Sunday January 19, 2020 10:31 AM EST (15:31 UTC) Moonrise 3:06AMMoonset 1:28PM Illumination 31% Phase: Waning Crescent; Moon at 24 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- 937 Am Est Sun Jan 19 2020
.small craft advisory in effect through Monday morning...
Rest of today..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Tonight..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft.
Mon..N winds 15 to 20 kt, becoming nw 10 to 15 kt in the afternoon. Gusts up to 30 kt. Seas 2 to 4 ft.
Mon night..NW winds 10 to 15 kt, becoming 5 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 4 ft. Light freezing spray.
Tue..N winds 5 to 10 kt, becoming nw in the afternoon. Seas 2 to 3 ft. Light freezing spray in the morning.
Tue night..W winds 5 to 10 kt. Seas 2 to 3 ft.
Wed..W winds around 5 kt. Seas around 2 ft.
Wed night..W winds 5 to 10 kt. Seas around 2 ft.
Thu..W winds 5 to 10 kt. Seas around 2 ft.
Thu night..W winds 5 to 10 kt. Seas 2 to 3 ft.
ANZ100 937 Am Est Sun Jan 19 2020
Synopsis for stonington me to merrimack river ma out to 25 nm.. Low pressure exits into the maritimes today. High pressure will gradually build across the waters early next week, and persist for several days. &&


7 Day Forecast for Marine Location Near Portsmouth, NH
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location: 43.08, -70.77     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 191438 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 938 AM EST Sun Jan 19 2020

SYNOPSIS. Low pressure exits into the maritimes today with some lingering clouds and snow showers, mainly across the higher terrain. Cold high pressure will then gradually build in for the first part of the week. Warmer weather looks likely mid to late week.

NEAR TERM /UNTIL 6 PM THIS EVENING/.

935 AM . For this ESTF update I made minor adjustments to near term grids to reflect colder mesonet values as well as satellite and radar trends.

Prev disc . 720 AM . At this point see very little in the way of addl accumulations, with only some light snow left across the ern zones, and this should end withing the hour, and some SHSN in the mtns, which are now transitioning to upslope type showers. So, all the WSWs will be dropped.

Previously . Secondary sfc low taking shape near KBOS and then will be sliding east toward the Bay of Fundy by midday. For the most part snow has ended or will end across all but nrn NH, the ME mtns and our ern zones by 12Z, with some lingering snow in these areas thru the morning. All precip associated with these system should be done by midday, but upslope SHSN will be possible in the mtns this afternoon. There's a bit of a trailing trough which will keep some clouds in place thru the morning, but some breaks of sun are expected this afternoon, moreso later in the day as the flow shifts and picks up from the NW. Highs will range from the low to mid 20s in the mtns to the mid upper 30s on the coast and in srn NH.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM MONDAY/. Sfc gradient will tighten overnight, as the low winds up over the maritimes, and sfc high approaches from the W, so N-NW wind s continue overnight with clearing skies outside of the mtns, where the upslope will continue to produce clouds and SHSN. CAA will persist thru the night and lows will drop to zero to 5 above in the mtns and 10-15 in the south.

Not much changes on Monday although the gradient will weaken some during the afternoon, but it should be mainly sunny with highs in the teens N, to the low to mid 20s in the S.

LONG TERM /MONDAY NIGHT THROUGH SATURDAY/. Monday night will be cold, calm, and clear. Because of this have pushed temperatures towards and slightly below the colder MEX in the northern valleys as fresh snow cover should further enhance the cooling. Expect some locations to reach the mid teens below zero with 20 below not out of the question if we can keep skies perfectly clear. Have continued the colder trend but will hold off on going too much colder in deference to the potential for just a few thin clouds to hold on.

Tuesday cooler temperatures aloft push into the region keeping daytime highs in the 20s south and teens north.

In a shift from last night, while temps aloft remain coldest on Tuesday, now seeing hints of a shortwave moving through late Tuesday. The result is a warmer trend for Tuesday night as increasing cloud cover prevents radiational cooling. Have trended the cloud cover up as well as temperatures and PoP, although it remains at a slight chance.

The warming trend continues through the end of the week as a ridge moves eastward across the CONUS. The dry spell continues with high pressure remaining firmly in place. The next chance for precipitation will be on the weekend when another storm will bring snow to the region.

AVIATION /15Z SUNDAY THROUGH THURSDAY/. Short Term . Will see gradual improvement this morning with all terminals improving to VFR by midday. VFR will persist thru Monday.

Long Term . VFR conditions will continue throughout the week with no chance of precipitation over the next 5 days. A few clouds may move through the mountains on Wednesday but still expect conditions to remain above VFR.

MARINE. Short Term . Although the S-SW flow will slacken a bit today, N-NW winds pick up late today and overnight, and will reach gusts of 15 kt or so overnight.

Long Term . High pressure builds in for the start of the week followed by a gradual warming trend as and upper level ridge returns warm air to the region. No precipitation is expected through the weekdays and winds and seas will remain below SCA for most of the week.

GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . Small Craft Advisory until 11 AM EST Monday for ANZ150-152-154.



ES


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 3 mi46 min WSW 1.9 25°F 1002 hPa20°F
CMLN3 4 mi147 min 9.9
IOSN3 - Isle of Shoals, NH 11 mi31 min W 9.9 G 11 26°F 1001.8 hPa (+0.0)26°F
44073 13 mi87 min WSW 9.7 G 12 28°F 43°F
44030 - Buoy B0102 - Western Maine Shelf 19 mi87 min W 5.8 G 7.8 4 ft1001.8 hPa
WELM1 - 8419317 - Wells, ME 20 mi43 min SW 2.9 G 5.1 23°F 36°F1002.2 hPa
WEXM1 - Wells Reserve, ME 21 mi31 min S 1 25°F 23°F
44098 - Jeffrey's Ledge, NH (160) 37 mi53 min 44°F4 ft
44029 - Buoy A0102 - Mass. Bay/Stellwagen 40 mi87 min W 16 G 18 31°F 42°F2 ft1000.5 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 45 mi41 min WNW 5.8 G 7.8 21°F 40°F4 ft1001.8 hPa (+0.9)17°F
CASM1 - 8418150 - Portland, ME 49 mi49 min 22°F 37°F

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH3 mi95 minW 310.00 miA Few Clouds21°F17°F87%1002.1 hPa
Rochester - Skyhaven Airport, NH16 mi1.7 hrsN 010.00 miFair19°F14°F81%1001.8 hPa
Sanford, Sanford Regional Airport, ME22 mi95 minESE 310.00 miFair20°F14°F78%1002.4 hPa

Link to 5 minute data for KPSM

Wind History from PSM (wind in knots)
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Last 24hrCalmCalmCalmS3S4SE6S6E3S6--CalmNW5NW6--N5N5NW8NW9NW5NW5NW5NW3SW4W3
1 day agoNW17
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Tide / Current Tables for Atlantic Heights, Piscataqua River, New Hampshire
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Atlantic Heights
Click for Map
Sun -- 12:10 AM EST     0.17 feet Low Tide
Sun -- 02:05 AM EST     Moonrise
Sun -- 06:43 AM EST     8.09 feet High Tide
Sun -- 07:09 AM EST     Sunrise
Sun -- 12:27 PM EST     Moonset
Sun -- 12:59 PM EST     -0.01 feet Low Tide
Sun -- 04:37 PM EST     Sunset
Sun -- 07:22 PM EST     7.17 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.51.63.35.36.97.98.17.35.73.71.70.4-00.41.73.45.26.57.1764.32.5

Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
Click for Map
Sun -- 01:50 AM EST     0.00 knots Slack
Sun -- 02:05 AM EST     Moonrise
Sun -- 03:55 AM EST     1.30 knots Max Flood
Sun -- 07:09 AM EST     Sunrise
Sun -- 07:52 AM EST     -0.00 knots Slack
Sun -- 10:39 AM EST     -1.85 knots Max Ebb
Sun -- 12:27 PM EST     Moonset
Sun -- 02:36 PM EST     0.00 knots Slack
Sun -- 04:25 PM EST     0.96 knots Max Flood
Sun -- 04:37 PM EST     Sunset
Sun -- 08:13 PM EST     -0.00 knots Slack
Sun -- 10:58 PM EST     -1.77 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.4-0.80.211.31.10.90.6-0.1-1.1-1.8-1.8-1.7-1.3-0.60.40.90.90.70.60.2-0.7-1.5-1.8

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 (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.