Friday, April10, 2020
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Marine Weather and Tides
Fallston, 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 6:33AMSunset 7:40PM Friday April 10, 2020 3:24 PM EDT (19:24 UTC) Moonrise 10:01PMMoonset 7:27AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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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ANZ538 Patapsco River Including Baltimore Harbor- 138 Pm Edt Fri Apr 10 2020
.gale warning in effect until midnight edt tonight...
.small craft advisory in effect from midnight edt tonight through late tonight...
This afternoon..W winds 25 kt with gusts to 40 kt. Waves 3 ft. A chance of sprinkles.
Tonight..NW winds 15 to 20 kt with gusts to 35 kt... Becoming W 10 kt with gusts to 20 kt after midnight. Waves 3 ft...subsiding to 1 ft after midnight.
Sat..W winds 10 kt with gusts to 20 kt. Waves 1 ft.
Sat night..W winds 5 to 10 kt...becoming se after midnight. Waves 1 ft or less.
Sun..S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of showers.
Sun night..S winds 15 to 20 kt. Waves 1 to 2 ft. Showers.
Mon..S winds 15 to 20 kt...becoming W 10 to 15 kt. Waves 1 to 2 ft. Showers with a chance of tstms through the day, then a chance of showers 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 138 Pm Edt Fri Apr 10 2020
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Strong and gusty westerly winds will persist over the waters today before high pressure gradually builds overhead tonight through Saturday. The high will then shift offshore Saturday night as low pressure tracks to our west Sunday night into Monday, ushering a cold front through the waters Monday evening. Small craft advisories will likely be required for a portion of the waters on Saturday, then again on Sunday, with gale conditions possible late Sunday night into Monday.


7 Day Forecast for Marine Location Near Fallston, MD
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location: 39.5, -76.5     debug


Area Discussion for - Baltimore, MD/Washington
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FXUS61 KLWX 101858 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 258 PM EDT Fri Apr 10 2020

SYNOPSIS.

High pressure will build over the region late tonight and hold through Easter Sunday. Strong cold front will impact the area Monday. The cold front will stall out to the south for the middle portion of next week, and waves of low pressure may track along the boundary, bringing the potential for unsettled conditions.

NEAR TERM /THROUGH TONIGHT/.

Clearing and turning colder tonight as winds subside. Freeze Warning is now in effect for roughly areas west of U.S. 29 to the I-81 corridor where growing season has started.

SHORT TERM /SATURDAY THROUGH MONDAY/.

Quiet weather Sat with high pressure in control. Powerful storm system is expected to develop over the Southern Plains Easter Sunday and track northeast into the Great Lks in response to negatively tilted trof. Rain/showers in warm advection pattern could arrive into western zones as early as Sun morning, but bulk of the heavy precip will be Sun night into midday Mon. Potential for 1-2 inches of rain with this system. Flooding threat non- zero, but does not appear to be a significant threat. Bigger threat will be for severe t-storms Mon morning in a high shear/low CAPE scenario similar to the Feb 07 Leesburg/Montgomery/Frederick/Carroll Counties tornadoes. Cdfnt will clear the fcst area by 18Z Mon with strong post- frontal winds in its wake. Potential for high winds of 50kt or greater exists with frontal passage.

LONG TERM /MONDAY NIGHT THROUGH FRIDAY/.

Rain will begin to diminish late Monday afternoon as the potent low moves off to the northeast.There could be some upslope snow showers along the Allegheny Front Monday evening as a strong WNW flow and CAA ensues into the region. However, weak high pressure will begin to move overhead during that time, which may suppress any upslope precip from materializing. The high will allow dry conditions to persist throughout the day Tuesday, as temperatures sit just below normal for April.

Overall, an active pattern continues into much of next week. A large upper level low will continue to retrograde over Canada; inducing a deep trough over the Central CONUS. There has been some wobbling amongst guidance in regards to a secondary low developing over the Gulf and traveling along the coast Wednesday, which would induce another round of rainfall across the CWA. With a frontal boundary expected to linger just to our south, the ECMWF has been persistent with developing a low over the Gulf; tracking along the stalled boundary. On the other hand, the GFS has this low tracking well offshore, which would mean drier conditions Wednesday. However, ensemble guidance is in agreement of the placement of the stalled boundary, which favors the ECMWF operational model. With that said, seems more likely than not, that Wednesday will feature additional rainfall. Weak high pressure looks to briefly return for Thursday and Friday.

Expect temperatures to run slightly below normal through the middle portion of next week, with a frost/freeze potential existing each night beginning Tuesday night.

AVIATION /19Z FRIDAY THROUGH WEDNESDAY/.

Strong NW winds up to around 35kt will continue through sunset then gradually diminish tonight as high pressure builds in. Showers develop Sun night with IFR conditions developing and low-level wind shear. Possible t-storms Mon morning which may produce damaging wind gusts. Cdfnt clears the area by 18Z Mon with strong pos-frontal winds upwards of 50 mph.

IFR/LIFR conditions are likely through early Monday afternoon with rain that can be heavy at times and possible thunderstorms. Gusty winds will also be an issue across the terminals with a strong low- level jet overhead. Conditions are expected to improve by late Monday afternoon as a cold front crosses the region. High pressure will then build across the region Monday night into Tuesday. VFR conditions are expected Tuesday albeit gusty WNW winds. Low pressure passing south of the terminals late Tuesday night could return sub VFR conditions in low CIGs.

MARINE.

Gale Warning continues until midnight tonight for Chesapeake Bay waters. Winds gradually diminish overnight into Saturday. Light winds will not last too long Sat afternoon as winds expected to increase again late Sat night. SCA conditions expected Sun with gale conditions likely Mon and even Storm Force winds in convective showers.

Gusty westerly winds persist Monday night and will continue across the waters on Tuesday in which SCA conditions are likely; at least for portions of the waters. As the gradient relaxes slightly by Tuesday night, a westerly wind seem poised to remain below SCA thresholds.

LWX WATCHES/WARNINGS/ADVISORIES. DC . Wind Advisory until 6 PM EDT this evening for DCZ001. MD . Wind Advisory until 6 PM EDT this evening for MDZ003>006-011- 013-014-501>508. Freeze Warning from midnight tonight to 9 AM EDT Saturday for MDZ003>006-503-505-507. VA . Wind Advisory until 6 PM EDT this evening for VAZ025>031-053- 054-501-503>508. Freeze Warning from midnight tonight to 9 AM EDT Saturday for VAZ025>031-036>040-050-051-501-502-505>508. WV . Wind Advisory until 6 PM EDT this evening for WVZ050>053-055- 501>506. Freeze Warning from midnight tonight to 9 AM EDT Saturday for WVZ051>053. MARINE . Small Craft Advisory from midnight tonight to 6 AM EDT Saturday for ANZ530>534-538>541-543. Gale Warning until midnight EDT tonight for ANZ530>534-538>541- 543. Small Craft Advisory from 6 PM this evening to midnight EDT tonight for ANZ535-536. Gale Warning until 6 PM EDT this evening for ANZ535>537-542. Small Craft Advisory from 6 PM this evening to 6 AM EDT Saturday for ANZ537-542.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BLTM2 - 8574680 - Baltimore, MD 17 mi54 min NNW 11 G 25 49°F 52°F1004 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 19 mi54 min WNW 30 G 35 47°F 1003.3 hPa
FSNM2 19 mi72 min W 37 G 44 46°F 1003.3 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 24 mi54 min WNW 28 G 35 47°F 52°F1003.9 hPa
CPVM2 35 mi54 min 49°F
APAM2 - 8575512 - Annapolis, MD 36 mi54 min 50°F 1004.3 hPa
CHCM2 - 8573927 - Chesapeake City, MD 37 mi54 min WNW 18 G 26 48°F 54°F1002.6 hPa
TPLM2 - Thomas Point, MD 42 mi84 min W 28 G 32 47°F 52°F1005.5 hPa (+1.2)23°F
DELD1 - 8551762 - Delaware City, DE 49 mi54 min WNW 20 G 29 47°F 56°F1001.6 hPa
RDYD1 - 8551910 - Reedy Point, DE 49 mi54 min 48°F 54°F1001.4 hPa

Wind History for Baltimore, MD
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Baltimore / Martin, MD12 mi90 minW 21 G 3110.00 miMostly Cloudy and Breezy48°F26°F43%1004.4 hPa
Baltimore, Inner Harbor, MD16 mi30 minno data mi50°F21°F33%1004.6 hPa
Phillips Army Air Field / Aberdeen, MD18 mi86 minWNW 15 G 2410.00 miOvercast47°F22°F37%1003.4 hPa
Baltimore, Baltimore-Washington International Airport, MD23 mi30 minWNW 20 G 3310.00 miMostly Cloudy and Breezy50°F24°F36%1004.6 hPa

Link to 5 minute data for KMTN

Wind History from MTN (wind in knots)
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1 day agoW10
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NW3W5NW3CalmCalmCalmCalmE6E4CalmCalmCalmCalmW6E3E3SE3SW4S4SW8W43
G51
W28
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2 days agoCalmCalmS3SW3SE4S4CalmSE3CalmCalmS4E3CalmS3SW5W5SW6W7W6W7
G14
W10NW6NW11
G17
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G21

Tide / Current Tables for Bowley Bar, Middle River, Maryland
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Bowley Bar
Click for Map
Fri -- 03:31 AM EDT     0.04 feet Low Tide
Fri -- 06:35 AM EDT     Sunrise
Fri -- 08:26 AM EDT     Moonset
Fri -- 10:01 AM EDT     1.98 feet High Tide
Fri -- 05:02 PM EDT     0.11 feet Low Tide
Fri -- 07:38 PM EDT     Sunset
Fri -- 10:25 PM EDT     1.28 feet High Tide
Fri -- 11:00 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.50.20.10.10.20.61.11.51.921.91.61.20.80.50.20.10.20.40.81.11.31.2

Tide / Current Tables for Battery Point, Gunpowder River, Maryland
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Battery Point
Click for Map
Fri -- 03:58 AM EDT     0.04 feet Low Tide
Fri -- 06:35 AM EDT     Sunrise
Fri -- 08:26 AM EDT     Moonset
Fri -- 10:14 AM EDT     1.98 feet High Tide
Fri -- 05:29 PM EDT     0.11 feet Low Tide
Fri -- 07:38 PM EDT     Sunset
Fri -- 10:38 PM EDT     1.28 feet High Tide
Fri -- 11:00 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.60.30.100.10.40.91.41.821.91.71.30.90.60.30.10.10.30.711.21.3

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Baltimore, MD/Washington (15,3,4,5)
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Ground Weather Radar Station Dover AFB, DE
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Disclaimer:
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.