Tuesday, March19, 2019 L-36.com


Marine Weather and Tides
Cobb Island, MD

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:11AMSunset 7:19PM Tuesday March 19, 2019 4:12 AM EDT (08:12 UTC) Moonrise 4:48PMMoonset 5:35AM Illumination 97% Phase: Waxing Gibbous; Moon at 13 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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ANZ537 Tidal Potomac From Cobb Island To Smith Point- 137 Am Edt Tue Mar 19 2019
Overnight..NW winds 5 kt. Waves less than 1 ft.
Tue..N winds 5 to 10 kt. Waves 1 ft.
Tue night..E winds 5 kt. Waves less than 1 ft.
Wed..SE winds around 5 kt. Waves 1 ft.
Wed night..SE winds 5 kt. Waves less than 1 ft. A chance of rain.
Thu..S winds 5 kt...becoming nw in the afternoon. Waves 1 ft. Rain.
Thu night..NW winds 5 to 10 kt. Gusts up to 25 kt after midnight. Waves 1 to 2 ft.
Fri..NW winds 10 to 15 kt. Waves 2 to 3 ft.
Sat..NW winds 10 to 15 kt. Waves 2 to 3 ft... Subsiding to 1 ft after midnight.
ANZ500 137 Am Edt Tue Mar 19 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will return for tonight through Wednesday. Low pressure will move northward along the coast Wednesday night, followed by a cold frontal passage Thursday. High pressure will return for late in the week into the weekend. A small craft advisory may be needed for portions of the waters later Wednesday through Friday.


7 Day Forecast for Marine Location Near Cobb Island, MD
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location: 38.22, -76.75     debug


Area Discussion for - Wakefield, VA
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Fxus61 kakq 190621
afdakq
area forecast discussion
national weather service wakefield va
221 am edt Tue mar 19 2019

Synopsis
High pressure builds across the area today before sliding
offshore of new england on Wednesday. The next low pressure
system impacts the region on Thursday.

Near term through today
As of 200 am edt Tuesday...

latest analysis indicates ~1032 mb sfc high pressure centered
from western pa to central in il, ridging into the local area.

Wnw flow prevails aloft. With the clearing skies and falling
temperatures last evening, areas of fog (most of it freezing
fog) has developed over portions of central and interior SE va.

Have issued an sps for now, with expectation that bulk of this
will shift S and diminish in coverage prior to sunrise. Will
re-evaluate need for another sps to cover the early part of the
morning rush prior to the 4 am forecast package. Lows early this
morning will avg in the mid upper 20s across most of central va
and the md eastern shore, to the lower-mid 30s in SE va NE nc
(and locally upper 30s immediate coast of SE va NE nc).

Skies will become sunny after any lingering early fog low
stratus early this morning as sfc high pressure becomes centered
over the local area. Highs will avg in the upper 40s lower 50s
near the coast due to a fairly light pressure pattern allowing
for an onshore flow (ne winds will be a little higher near the
coast in SE va NE nc). Farther inland, highs will generally be
in the mid to upper 50s. Very dry inland this aftn with sfc dew
pts falling into the teens and lower 20s.

Short term tonight through Thursday
As of 245 pm edt Monday...

sfc hi pressure slides offshore of new england Tue night-wed w
a coastal trough sitting offshore of the carolinas. Mostly skc
inland... Partly cloudy toward SE va-ne nc by wed
afternoon night. A strong trough digs through the oh tn valleys
wed night then to the E coast by late thu... W sfc lo pres
developing off ERN nc. Sct shras are possible W the trough sfc
cold front pushing in from the W thu... While moisture will be
increasing toward the coast (along W pops rising to about 60%).

Appears right now to be a glancing blow from any coastal lo
pres system during thu.

Lows Tue night in the l30s N and W to the u30s at the coast in
se va-ne nc. Highs Wed in the m-u50s at the coast... Around 60f
inland. Lows Wed night from the u30s N and W to the l40s se.

Highs Thu from the m50s at the coast to the l60s inland.

Long term Thursday night through Monday
As of 220 pm edt Monday...

lo pres tracks ene and away from the mid-atlantic coast thu
night. A rather potent trough aloft in NW flow dives across the
fa Fri W periods of clouds and possible shras. Drying clearing
out Fri night... Then hi pres and dry wx is expected sat-mon.

Lows Thu night from the m-u30s inland to the l-m40s along
coastal SE va-ne nc. Highs Fri in the m-u50s N and E to around
60f sw. Lows Fri night from the m30s along-w of I 95 to the l40s
along coastal SE va-ne nc. Highs Sat in the l-m50s at the coast
in va-md to 60-65f inland. Lows Sat night in the m-u30s inland
to 40-45f at the coast. Highs Sun in the u50s-l60s near the bay
and on the ERN shore to 65-70f elsewhere. Lows Mon night in the
m-u40s. Highs Mon from 60-65f near the bay and on the ERN shore
to the l70s inland.

Aviation 06z Tuesday through Saturday
As of 200 am edt Tuesday...

patchy fog ifr conditions are affecting kric ksby through the
next few hrs. Ifr vsbys may affect kphf from about 08-10z as
well. OtherwiseVFR mainly clear skies today as sfc high
pressure settles over the region.VFR conditions are expected to
persist tonight into Wed as the sfc high drifts off the coast.

Periodic flight restrictions appear likely on Thu as low
pressure initially off the carolina coast moves into the
region. Drier conditions return late Thu night Fri as winds
shift to the nw.

Marine
As of 330 pm edt Monday...

latest sfc analysis shows weak low pressure centered over ERN nc,
with high pressure over the midwest building into the ohio valley.

Winds are out of the E NE around 15 kt. A few gusts to ~20 kt
have been observed over the lower bay lower james river at the
typical elevated sites this aftn. Seas are 2-2.5 ft N 3-3.5 ft
s, with 2 ft waves on the bay.

The area of low pressure moves offshore early this evening as
high pressure continues to build e. This will allow winds
briefly increase out of the NE at 15-20 kt (with gusts of 20-25
kt) over the lower bay, lower james river, and ocean zones S of
cape charles during the next few hours. Issued short-fused scas
for these areas through 02-05z Tue to account for this brief
increase in winds. In addition, seas will build to 4-5 ft S of
cape charles this evening, with seas remaining AOB 4 ft further
n. Elsewhere, predominant winds are progged to remain around 15
kt. Kept scas going through Tue tue night over the nc coastal
waters and the currituck sound. Winds remain in the 15-20 kt
range over the waters of nc, but diminish to below sca
thresholds over va overnight since the sfc high builds over va
rather quickly. NE winds remain in the 10-15 kt range over the
majority of the waters from tue-tue night, but remain 15-20 kt
s of the va nc border (as seas remain around 5 ft). Sub-sca
conditions return to the far SRN marine zones by Wed as high
pressure returns to the region. Another area of low pressure is
progged to track just to the SE of the CWA from thu-thu night.

This may bring a return of SCA conditions to the area
(especially s) on thu, but there is still some disagreement in
the guidance regarding the specific details. A stronger surge
of cold air is progged to cross the area late Thu into Fri (then
again late fri-sat). These periods of CAA could bring another
couple rounds of SCA conditions to the region.

Akq watches warnings advisories
Md... None.

Nc... None.

Va... None.

Marine... Small craft advisory until 7 am edt Wednesday for anz658.

Small craft advisory until 7 pm edt this evening for anz633.

Synopsis... Lkb
near term... Lkb
short term... Alb jdm
long term... Alb
aviation... Lkb
marine... Eri lkb


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PPTM2 - 8578240 - Piney Point, MD 13 mi42 min NNE 4.1 G 4.1
NCDV2 17 mi48 min W 1 G 1 34°F 1028.5 hPa
SLIM2 - 8577330 - Solomons Island, MD 17 mi42 min NW 2.9 G 4.1 37°F 45°F1028.8 hPa
LWTV2 - 8635750 - Lewisetta, VA 22 mi48 min WNW 2.9 G 2.9 37°F 47°F1029 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 23 mi42 min N 11 G 12 41°F 1029.4 hPa
44042 - Potomac, MD 26 mi36 min N 5.8 G 5.8 38°F 45°F1029.6 hPa
BISM2 - 8571421 - Bishops Head, MD 38 mi42 min NNW 4.1 G 5.1 38°F 48°F1029.2 hPa
BSLM2 - Chesapeake Bay, MD 39 mi162 min Calm 30°F 1030 hPa
CA2 - 8571892 - Cambridge, MD 44 mi42 min 38°F 47°F1028.7 hPa
WASD2 - 8594900 - Washington, DC 47 mi42 min N 4.1 G 8 41°F 50°F1029.3 hPa

Wind History for Piney Point, MD
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St Marys County Airport, MD12 mi29 minN 03.00 miFair30°F30°F100%1029.5 hPa
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD18 mi19 minN 01.00 miFog/Mist30°F28°F96%1028.7 hPa
Patuxent River, Naval Air Station, MD19 mi20 minW 37.00 miFair34°F34°F100%1028.8 hPa

Wind History from 2W6 (wind in knots)
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Last 24hrCalmCalmCalmCalmE5E4E3NE5CalmNE3N5NE4E4E4E4CalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmNE3N3W9W9SW7
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SW8W7SE5SE3CalmCalmCalmN3CalmCalmCalmCalm
2 days agoW5
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Tide / Current Tables for Colton's Point, Maryland
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Colton's Point
Click for Map
Tue -- 01:47 AM EDT     2.04 feet High Tide
Tue -- 06:34 AM EDT     Moonset
Tue -- 07:12 AM EDT     Sunrise
Tue -- 07:46 AM EDT     -0.07 feet Low Tide
Tue -- 02:12 PM EDT     2.13 feet High Tide
Tue -- 05:48 PM EDT     Moonrise
Tue -- 07:17 PM EDT     Sunset
Tue -- 08:19 PM EDT     -0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.7221.81.30.80.40-0.10.10.61.21.722.121.61.10.60.2-0.1-00.30.9

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

Tue -- 12:42 AM EDT     -0.00 knots Slack
Tue -- 04:32 AM EDT     -0.82 knots Max Ebb
Tue -- 06:33 AM EDT     Moonset
Tue -- 07:11 AM EDT     Sunrise
Tue -- 08:22 AM EDT     0.00 knots Slack
Tue -- 10:36 AM EDT     0.61 knots Max Flood
Tue -- 01:15 PM EDT     -0.00 knots Slack
Tue -- 05:09 PM EDT     -0.99 knots Max Ebb
Tue -- 05:46 PM EDT     Moonrise
Tue -- 07:16 PM EDT     Sunset
Tue -- 09:15 PM EDT     0.00 knots Slack
Tue -- 11:09 PM EDT     0.53 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.2-0.1-0.4-0.7-0.8-0.8-0.7-0.4-0.10.30.60.60.40.1-0.3-0.6-0.9-1-0.9-0.8-0.5-0.10.30.5

Weather Map and Satellite Images
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GOES 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.
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Wind Forecast for Wakefield, VA (4,6,7,8)
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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 numerious 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.