Thursday, April9, 2020
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Marine Weather and Tides
California, MD

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 6:37AMSunset 7:40PM Thursday April 9, 2020 8:50 PM EDT (00:50 UTC) Moonrise 8:45PMMoonset 6:52AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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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ANZ542 Patuxent River To Broomes Island Md- 829 Pm Edt Thu Apr 9 2020
.small craft advisory in effect through Friday morning...
.gale warning in effect from Friday morning through Friday afternoon...
.small craft advisory in effect from Friday evening through late Friday night...
Tonight..W winds 15 kt with gusts to 25 kt. Waves 1 ft.
Fri..W winds 15 to 20 kt. Gusts up to 25 kt... Increasing to 35 kt in the late morning and afternoon. Waves 1 to 2 ft.
Fri night..NW winds 15 to 20 kt with gusts to 30 kt...diminishing to 10 kt with gusts to 20 kt after midnight. Waves 1 to 2 ft.
Sat..W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Sat night..S winds 5 to 10 kt. Waves 1 ft.
Sun..S winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
Sun night..S winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft. Showers.
Mon..S winds 15 to 20 kt...becoming W 10 to 15 kt in the evening, then becoming nw after midnight. Waves 1 ft. Showers with tstms likely through the day, then showers likely in the evening.
Tue..NW winds 5 to 10 kt. Waves 1 ft. A chance of rain through the night. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 829 Pm Edt Thu Apr 9 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Strong westerly winds will continue through tonight behind a passing cold front. High pressure will gradually build overhead tonight through Saturday. High pressure will move offshore Sunday and low pressure will pass through the waters Sunday night into Monday. A cold front will pass through Tuesday. Small craft advisories will likely be needed Saturday.


7 Day Forecast for Marine Location Near California CDP, MD
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location: 38.33, -76.51     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 091910 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 310 PM EDT Thu Apr 9 2020

SYNOPSIS. A cold front will exit to the east tonight while low pressure deepens near Maine. The strong low will remain nearly stationary through Friday, then high pressure will be able to build overhead Saturday. Low pressure will affect the area Sunday into Monday. High pressure builds back into our region through the middle parts of next week.

NEAR TERM /UNTIL 6 AM FRIDAY MORNING/. Convective/severe threat has ended, so the Severe Thunderstorm Watch has been cancelled. Wind Advisory was extended in time until 7 PM (some strong gusts possible through sunset) as well as down the east side of the Blue Ridge (strong enough wind fields plus downsloping effects are resulting in 40 kt gusts in the lee of the mountains). The peak gusts of the day likely are occurring or have occurred (west of I-95) with the immediate pressure surge behind the front, which is now pressing through southern Maryland.

As low pressure deepens and slows down near Maine, low level wind fields will remain strong through the night. Should be below advisory levels (except perhaps on the ridges), but elevated gusts will likely continue through the night. Vorticity rotating around a closed upper low to our north may result in a few showers across northern areas through this evening. Snow showers (and perhaps squalls) will be found along the Allegheny Front, although accumulations should generally remain below advisory criteria. Cold advection will result in lows in the 30s to lower 40s.

SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/. The low will remain nearly stationary near the Canadian Maritimes through Friday while high pressure attempts to build in from the west. This will keep a tight pressure gradient across our area, so winds should increase again after sunrise. Will allow subsequent shifts to determine if additional Wind Advisories will be needed. Upslope snow showers will begin to diminish as the upper low pivots away. Otherwise expect a mix of clouds and sun with much cooler high temperatures in the 40s to mid 50s.

The gradient winds will continue to weaken Friday evening and into Saturday as the surface low continues to lift northeastward away from our region. As winds become light and cooler air moves into our region, we may need to issue some frost/freeze headlines for portions of our forecast area Friday night into Saturday morning. High pressure will be firmly in place over our region Saturday with winds becoming light. Temperatures will be continue to be cooler with daytime temps in the 50s and lower 60s. A warm front will lift north of our area late Saturday night. A lead vort max ahead of the next system may try to produce a shower or sprinkle across western areas, but most areas should remain dry. Temperatures will moderate a bit into the upper 30s to mid 40s.

LONG TERM /SUNDAY THROUGH THURSDAY/. Dry conditions are likely early Sunday with high pressure offshore. However a potent shortwave diving south out of the Texas Panhandle will generate a strong area of low pressure over the Gulf of Mexico. Rain will begin developing Sunday evening as the low tracks northeastward along the Appalachians. Guidance has been very consistent with this system in regards to the abundance of rainfall associated with it. PWAT anamolies based on ensemble guidance continues to remain 2 to 2.5 standard deviations above normal. Ample moisture coupled with strong jet dynamics signal periods of heavy rainfall through the day Monday. Overall, expect a general 1-2 inches of rainfall across the region. In terms of any possible severe weather poised for Monday, confidence remains low at this time given low CAPE values and weak mid-level lapse rates. However given the high shear profile, could be enough to cause locally damaging winds and perhaps a spin up. The best chance for this to occur would be late Sunday night through midday Monday as the low's associated cold front moves through the CWA. On a positive note, this is a quick moving system and most, if not all, precip will cease by Monday night.

Weak high pressure will move overhead for Tuesday, giving us a break in the action. However, the jet stream remains quite active as most of the continental US remains under a longwave trough. Model guidance begins to diverge after Tuesday in regards to another shortwave pulse that could generate another low over the Gulf of Mexico. The ECMWF develops it just to our southeast, which would set us up for a similar situation to Monday's system. However the GFS develops this low further offshore, which would keep our area drier. In any case, expect the long term pattern to remain unsettled, with cooler than normal temperatures developing after Monday through the end of next week.

AVIATION /19Z THURSDAY THROUGH TUESDAY/. Cold front has passed through the terminals. Strongest wind gusts probably occurred immediately in the wake of the front. However, strong background westerly winds to around 40 kt will likely continue until sunset. A few showers or sprinkles may be near BWI/MTN/MRB through this evening but shouldn't pose any ceiling/visibility issues. While winds diminish some overnight, some 20-30 kt gust will remain likely.

Strong westerly winds will continue into Friday with gusts of 25 to 40 knots possible. Winds are expected to slowly taper off Friday evening and into Saturday. No flight restrictions are expected Friday and Saturday.

VFR conditions are likely early Sunday before CIG/VSBY restrictions ensue by Sunday evening as rain develops across the region. IFR/LIFR conditions are likely Monday with periods of heavy rain and possible thunderstorms. Low-level wind shear is also of concern given a very strong wind field aloft. Gusty winds are also likely and even damaging winds cannot be ruled out at this time. Conditions are likely to improve by Monday evening as the low quickly moves away from the terminals.

MARINE. Strong west winds are occurring in the wake of a frontal passage. Gale Warnings remain in effect through the afternoon, and may need to be extended into the evening for portions of the waters. Generally SCA winds expected overnight, but will increase again after sunrise. Portions of the waters may need a Gale Warning, but am letting subsequent shifts make that determination. SCA conditions will continue through Friday night before diminishing Saturday as high pressure builds overhead.

Low pressure will track northeastward Sunday evening into Monday. Gusty south to southeast winds are likely, with the strongest winds most likely Sunday night into Monday morning. Periods of heavy rain and perhaps even a couple thunderstorms are expected. Gusty to damaging winds are possible in any thunderstorms that develop. A brief waterspout is possible as well, given a very strong wind field aloft. Confidence for this to occur is low at this time.

LWX WATCHES/WARNINGS/ADVISORIES. DC . Wind Advisory until 7 PM EDT this evening for DCZ001. MD . Wind Advisory until 7 PM EDT this evening for MDZ003>006-011- 013-014-501>508. VA . Wind Advisory until 7 PM EDT this evening for VAZ025>031- 036>040-052>054-501-503>508. WV . Wind Advisory until 7 PM EDT this evening for WVZ050>053-055- 501>506. MARINE . Small Craft Advisory from 6 PM this evening to 6 AM EDT Friday for ANZ530>543. Gale Warning until 6 PM EDT this evening for ANZ530>543.

SYNOPSIS . ADS NEAR TERM . ADS SHORT TERM . ADS LONG TERM . MSS AVIATION . ADS/MSS MARINE . ADS/MSS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SLIM2 - 8577330 - Solomons Island, MD 3 mi51 min NNW 16 G 23 56°F 57°F996.9 hPa (+3.0)
COVM2 - 8577018 - Cove Point LNG Pier, MD 8 mi63 min NW 26 G 35 997.5 hPa
PPTM2 - 8578240 - Piney Point, MD 14 mi51 min N 19 G 22
44062 - Gooses Reef, MD 16 mi39 min NW 19 G 23 56°F
44042 - Potomac, MD 23 mi33 min NW 19 G 25 57°F 997.3 hPa
LWTV2 - 8635750 - Lewisetta, VA 23 mi51 min N 17 G 25 58°F 61°F997.5 hPa (+3.7)
BISM2 - 8571421 - Bishops Head, MD 26 mi51 min NNW 18 G 26 56°F 62°F996.8 hPa (+3.6)
NCDV2 28 mi57 min NNW 8 G 16 56°F 61°F997.3 hPa
CA2 - 8571892 - Cambridge, MD 29 mi51 min NW 19 G 26 56°F 58°F997.3 hPa (+3.2)
BSLM2 - Chesapeake Bay, MD 33 mi141 min WNW 12 997 hPa
TPLM2 - Thomas Point, MD 40 mi51 min WNW 17 G 19 55°F 54°F999.3 hPa (+2.5)27°F
APAM2 - 8575512 - Annapolis, MD 45 mi51 min 997.9 hPa (+2.5)
CPVM2 46 mi51 min 55°F
WASD2 - 8594900 - Washington, DC 46 mi51 min NW 15 G 22 55°F 60°F999.1 hPa (+1.8)

Wind History for Solomons Island, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD2 mi65 minNW 10 G 2110.00 miFair54°F24°F33%998 hPa
Patuxent River, Naval Air Station, MD6 mi59 minNNW 23 G 3110.00 miA Few Clouds and Windy57°F33°F41%997 hPa
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD14 mi58 minNW 8 G 2510.00 miFair60°F28°F31%996.8 hPa

Link to 5 minute data for KNHK

Wind History from NHK (wind in knots)
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Last 24hrS7CalmCalmCalmSW4SE4SE6SE6SE6SE4SW10W15
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1 day agoS4S5SW10SW8CalmE5S3SW3W6NW9NW10W14SW15
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2 days agoCalmCalmS6SW6S6SW6SW3SW6SW5CalmCalmE4S3SW9SW8SE8SE9W12
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G20
SE4CalmS3

Tide / Current Tables for Solomons Island, Patuxent River, Maryland
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Solomons Island
Click for Map
Thu -- 03:41 AM EDT     1.72 feet High Tide
Thu -- 06:37 AM EDT     Sunrise
Thu -- 07:51 AM EDT     Moonset
Thu -- 10:12 AM EDT     0.04 feet Low Tide
Thu -- 04:03 PM EDT     1.37 feet High Tide
Thu -- 07:37 PM EDT     Sunset
Thu -- 09:45 PM EDT     Moonrise
Thu -- 10:15 PM EDT     -0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

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0.61.11.41.71.71.51.20.80.50.200.10.40.711.31.41.310.70.30.1-0.1-0

Tide / Current Tables for Point Patience, 0.1 mile southwest of, Maryland Current
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Point Patience
Click for MapFlood direction 315 true
Ebb direction 145 true

Thu -- 12:31 AM EDT     0.73 knots Max Flood
Thu -- 03:17 AM EDT     -0.00 knots Slack
Thu -- 06:38 AM EDT     Sunrise
Thu -- 07:14 AM EDT     -1.13 knots Max Ebb
Thu -- 07:51 AM EDT     Moonset
Thu -- 11:33 AM EDT     0.00 knots Slack
Thu -- 01:09 PM EDT     0.45 knots Max Flood
Thu -- 03:22 PM EDT     -0.00 knots Slack
Thu -- 07:07 PM EDT     -0.85 knots Max Ebb
Thu -- 07:37 PM EDT     Sunset
Thu -- 09:45 PM EDT     Moonrise
Thu -- 10:51 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.50.1-0.3-0.7-1-1.1-1.1-0.9-0.6-0.20.20.40.40.1-0.2-0.5-0.8-0.9-0.8-0.6-0.30.1

Weather Map
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GEOS Local Image of Mid-Atlantic    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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Wind Forecast for Baltimore, MD/Washington (20,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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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.