Wednesday, October20, 2021
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Marine Weather and Tides
Dover, NH

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:02AMSunset 5:53PM Wednesday October 20, 2021 9:01 AM EDT (13:01 UTC) Moonrise 6:10PMMoonset 6:51AM Illumination 100% Phase: Full Moon; Moon at 14 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- 657 Am Edt Wed Oct 20 2021
Today..NW winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt early this afternoon, then becoming sw late. Seas around 2 ft.
Tonight..SW winds around 5 kt. Seas 1 foot or less.
Thu..SW winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon.
Thu night..S winds 10 to 15 kt, becoming sw 15 to 20 kt after midnight. Seas 2 to 4 ft.
Fri..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Fri night..NW winds around 10 kt, becoming N with gusts up to 20 kt after midnight. Seas 2 to 3 ft.
Sat..N winds 5 to 10 kt. Seas around 2 ft. A chance of showers in the afternoon.
Sat night..NW winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 to 3 ft. A chance of showers.
Sun..NW winds 10 to 15 kt. Seas 2 to 3 ft.
Sun night..NW winds 10 to 15 kt. Seas 2 to 3 ft.
ANZ100 657 Am Edt Wed Oct 20 2021
Synopsis for stonington me to merrimack river ma out to 25 nm.. Winds and seas will diminish through the day as high pressure builds into the area. Winds become southerly Thursday ahead of a cold front which will approach the waters Friday. Broad low pressure resides just outside the gulf of maine through the weekend.


7 Day Forecast for Marine Location Near Dover, NH
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location: 43.2, -70.87     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 201106 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 706 AM EDT Wed Oct 20 2021

SYNOPSIS. High pressure today welcomes a warming trend into tomorrow with above normal temperatures until a cold front crosses Friday. Light rain showers are expected with this feature, then a cool air mass settles in over the region for the weekend and into the beginning of next week. Precipitation chances are low going into next week, but overnight low temperatures may deliver a well- overdue frost or freeze to the region.

NEAR TERM /UNTIL 6 PM THIS EVENING/. 7am Update . With just high clouds remaining across much of the CWA early this morning, took a closer look to refine winds and resulting mixing for this afternoon. Mixing just above 900mb will be possible today amid the encroaching high pres. This will dry out sfc dewts well.

Previous Discussion . The embedded shortwave that brought some isolated rain showers to the area last night will continue to push east this morning. In its wake amid NW flow, decreasing clouds will give way to a mostly sunny day. Temperatures will push into the mid to upper 60s in far southern NH/ME, potentially seeing a couple readings of 70 degrees. Warmest temps will stay right along the coast up through Maine as offshore winds suppress much marine influence. Speaking of winds, they will be a bit breezy . but lighter than Tues as the pres grad opens and stationary boundary drapes across central NH.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/. Low pressure will organize over the Great Lakes tonight and track along an outstretched stationary/warm front draped across New England. With an upper low descending from Hudson Bay, the sfc low pres will be tugged north. This will keep the greatest chance of rain across mostly the northern mtns of NH, and western mtns of Maine.

Rain showers are expected to be light, pushing north late Wed night and continuing Thursday. With a fairly obtuse warm sector east of the low's center and little threat of showers, highs Thursday are again expected to push towards 70 for southern NH and ME.

LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/. The Pacific jet continues to be quite strong through the extended forecast period, providing plenty of upper level energy into NOAM and producing an active wave pattern over New England. We start the period with high pressure pushing east and a cold front crossing on Friday. The coolest air comes in toward the end of the weekend with freezes finally on the table across the forecast area to start the next work week. Cool high pressure makes a gradual return by around Tuesday and looks to hang around for at least a couple days. Long range ensembles suggest a somewhat slow wave pattern progression through the period and an anomalously strong ridge building mid/late next week. Overall not much is expected in the way of impacts, with light rainfall (and higher terrain mix/snow) amounts expected and a continued trend of seasonably cool weather.

For the details . Thursday night will be the mildest of the stretch with warm, humid southwest flow and mostly cloudy skies. Low temperatures will land in the 40s and 50s with increasing shower chances especially over the western and northern zones as a prefrontal trough crosses aloft. A cold front crosses during the day with similarly warm temperatures out ahead of it . with highs in the 60s to near 70 outside of the mountains, which likely stay in the 50s to near 60 with more clouds. The front crosses with little fanfare outside of a brisk westerly, then northwesterly, wind shift since the prefrontal trough will have greatly decreased moisture availability. There's a good chance that southern and coastal areas see hardly any rain . if at all . through the whole system passage, with maximum amounts toward the north in the 0.25-0.5" range.

Cooler air gradually pours in through the weekend as a trough anchored near James Bay pushes south and east toward New England . sending another wave or two across the East Coast sometime along the way. Saturday and Sunday will be progressively cooler with highs in the 50s relenting to the 40s to low- 50s . and overnight lows similarly in the mid-30s and 40s relenting to the low-30s to near 40 by Sunday morning. Broad cyclonic flow and instability from continued CAA leaves a chance for a stray shower in addition to bouts of upslope showers but the bulk of the weekend should be dry for the bulk of the area with partly to mostly cloudy skies. The main thing to keep an eye on is low pressure amplification well off the coast, which would pull in a strongest northwest wind on Sunday, but certainly not to hazardous thresholds.

Cool high pressure building over the Great Lakes Region makes a push toward New England to start the next work week. This combined with the dry airmass in place likely leads to a more sunshine, but highs will still struggle into the 50s. Monday and/or Tuesday mornings could see widespread freeze or at least frost conditions for the area, something we are long overdue for at this stage of the season. The upper level pattern in the meantime grows more uncertain as the Pacific jet surges into or through the Rockies, amplifying the downstream pattern in the form of anomalously strong ridging building overhead. Little else can be reasonably gleaned from the pattern at this stage however.

AVIATION /12Z WEDNESDAY THROUGH SUNDAY/. Short Term . VFR Wednesday with some NW wind gusts up to 15 kt this afternoon. MVFR ceilings are possible across the higher terrain late Wed night into Thursday, mainly for KHIE.

Long Term /Thursday night through Sunday/ . \Southwest flow and SHRA Thursday night into early Friday may bring ceilings to MVFR for a time. A cold front crosses Friday with winds turning westerly, then northwesterly. Upsloping flow may bring another bout of MVFR ceilings at times through the weekend . but otherwise VFR will prevail.

MARINE. Short Term . Winds and waves below SCA criteria through Thursday. Offshore winds today will slacken this evening and become southerly through Thursday. Low pressure to the west will approach Maine Thursday evening. With offshore wind, waves will remain 1 to 2 feet for much of the intracoastal and coastal waters.

Long Term /Thursday night through Sunday/ . Southerly gusts may briefly approach 25 kts along the outer waters late Thursday night or early Friday morning ahead of a cold front, which crosses the waters by the end of Friday. Winds turn to the west and then northwest for the weekend with the only other threat being low pressure amplifying along the eastern periphery of the Gulf of Maine . which may bring a brief period of offshore gusts to near 25 kts over eastern marine zones.

GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . None.

NEAR TERM . Cornwell SHORT TERM . Cornwell LONG TERM . Casey


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 10 mi76 min W 4.1 47°F 1011 hPa44°F
CMLN3 13 mi177 min WNW 8 85°F 58°F
WELM1 - 8419317 - Wells, ME 18 mi43 min WNW 5.1G7 52°F 56°F1011.1 hPa
WEXM1 - Wells Reserve, ME 19 mi61 min W 2.9 49°F 40°F
44073 21 mi177 min W 12G14 55°F 58°F
IOSN3 - Isle of Shoals, NH 21 mi61 min W 15G16 53°F 1010.5 hPa (+1.9)42°F
44030 - Buoy B0102 - Western Maine Shelf 24 mi117 min W 14G18 55°F 58°F1 ft1009.8 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 45 mi31 min NW 9.7G9.7 53°F 58°F1010.5 hPa42°F
44098 - Jeffrey's Ledge, NH (160) 46 mi35 min 57°F3 ft
CASM1 - 8418150 - Portland, ME 46 mi43 min 49°F 58°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 49 mi117 min W 16G19 57°F 2 ft1009.6 hPa

Wind History for Wells, ME
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Rochester - Skyhaven Airport, NH6 mi70 minVar 310.00 miFair50°F40°F68%1010.8 hPa
Pease Air Force Base / Portsmouth, NH8 mi65 minWSW 710.00 miMostly Cloudy49°F40°F72%1011.8 hPa
Sanford, Sanford Regional Airport, ME16 mi65 minWSW 610.00 miFair44°F42°F93%1011.3 hPa

Link to 5 minute data for KDAW

Wind History from DAW (wind in knots)
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NW9NW10N500000300004334
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2 days agoNW12
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NW11NW700000W30W4W5W5W7W563NW6W7

Tide / Current Tables for Salmon Falls River entrance, Piscataqua River, New Hampshire
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Salmon Falls River entrance
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Wed -- 01:04 AM EDT     7.29 feet High Tide
Wed -- 06:51 AM EDT     Moonset
Wed -- 07:03 AM EDT     Sunrise
Wed -- 07:26 AM EDT     0.16 feet Low Tide
Wed -- 10:57 AM EDT     Full Moon
Wed -- 01:21 PM EDT     7.45 feet High Tide
Wed -- 05:51 PM EDT     Sunset
Wed -- 06:09 PM EDT     Moonrise
Wed -- 07:49 PM EDT     -0.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Tide / Current Tables for Portsmouth Harbor Entrance, New Hampshire Current
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Portsmouth Harbor Entrance
Click for Map
Wed -- 12:59 AM EDT     -0.00 knots Slack
Wed -- 03:58 AM EDT     -1.86 knots Max Ebb
Wed -- 06:50 AM EDT     Moonset
Wed -- 07:02 AM EDT     Sunrise
Wed -- 07:32 AM EDT     0.00 knots Slack
Wed -- 09:43 AM EDT     1.17 knots Max Flood
Wed -- 10:57 AM EDT     Full Moon
Wed -- 01:25 PM EDT     -0.00 knots Slack
Wed -- 04:23 PM EDT     -1.89 knots Max Ebb
Wed -- 05:51 PM EDT     Sunset
Wed -- 06:09 PM EDT     Moonrise
Wed -- 08:01 PM EDT     0.00 knots Slack
Wed -- 10:01 PM EDT     1.03 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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