Thursday, September20, 2018

Marine Weather and Tides
Madison, MD

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:49AMSunset 7:05PM Thursday September 20, 2018 3:42 AM EDT (07:42 UTC) Moonrise 3:59PMMoonset 1:25AM Illumination 78% Phase: Waxing Gibbous; Moon at 10 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
    EDIT      (on/off)   Help
ANZ533 Chesapeake Bay From North Beach To Drum Point- 134 Am Edt Thu Sep 20 2018
Overnight..NE winds 5 kt. Waves less than 1 ft. Patchy fog. Vsby 1 to 3 nm.
Thu..E winds 5 kt. Waves less than 1 ft.
Thu night..SE winds 5 to 10 kt. Waves 2 ft.
Fri..SE winds 10 to 15 kt. Waves 1 to 2 ft.
Fri night..S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft.
Sat..NW winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Sat night..NE winds 5 to 10 kt. Waves 1 ft. A chance of showers.
Sun..NE winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers.
Mon..E winds 10 kt. Waves 2 ft. A chance of showers.
ANZ500 134 Am Edt Thu Sep 20 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build over the waters through Thursday before moving offshore Friday. A cold front will approach from the great lakes this weekend, then stall near or just south of the waters into early next week. Small craft advisories may be needed for portions of the waters late Friday into Saturday.

7 Day Forecast for Marine Location Near Madison, MD
   Hourly   EDIT   Help
location: 38.49, -76.22     debug

Area Discussion for - Wakefield, VA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kakq 200624
area forecast discussion
national weather service wakefield va
224 am edt Thu sep 20 2018

High pressure builds over the mid atlantic region tonight
into Thursday, and then slides offshore Friday. A cold front will
approach front the north Saturday, and then settle over the region

Near term until 7 am this morning
As of 800 pm edt Wednesday...

* NWS surveys have determined that there have been 8 confirmed
tornadoes from yesterday. See pnsakq for details.

The current surface analysis shows low pressure well
offshore, and 1022mb high pressure centered N of the great lakes.

Still some showers over the piedmont but these are slowly
diminishing now W loss of daytime heating. A weak cold front
will push in from the N overnight as high pressure builds into
new england. Any showers associated with this front are expected
to remain N of the local area, but some low clouds are expected
to move over the md ERN shore toward morning. Some patchy fog is
expected in the piedmont, especially where the rain occurred.

Temperatures currently in the 70s are expected to drop into the
mid-upper 60s for most areas overnight, the exception being the
immediate coast in SE va NE nc where lows will be in the lower

Short term 7 am this morning through Saturday
As of 400 pm edt Wednesday...

high pressure slides across new england Thursday and
the slides off the coast Thursday night. Mainly onshore flow behind
the front Thursday, partly to mostly sunny, and cooler over the ern
shore. Highs over the ERN shore are expected to be in the 70s, while
highs are still expected to be in the low mid 80s well inland. There
is some semblance of a warm front and weak shortwave trough passing
over the mountains Thursday night. Mostly clear E with lows in the
low 60s, partly cloudy W with lows in the mid 60s with a minimal chc
of a light shower.

The ridge of sfc high pressure moves to the south and east of the
area by Friday as a strong area of sfc low pressure moves into sern
canada. This will allow the wind to turn back to s. Forecast highs
Friday are in the mid 80s in most areas (with lower 80s on the
eastern shore) under a mostly sunny sky.

High pressure slides offshore Friday night, with a cold front
approaching from the N Saturday. Opting for a slower frontal passage
Saturday, which will result in warmer temperatures, and pops for
showers tstms 30-40% across the N during the aftn, and 20-30% across
the s. Lows Thursday night will generally be in the mid upper 60s,
followed by highs Saturday in the low mid 80s across the N and
mid upper 80s s.

Long term Saturday night through Wednesday
As of 400 pm edt Wednesday...

an unsettled period next week as the models continue to show a
frontal system stalling across the mid atlantic region with several
impulses of energy progged to move along it. What is different today
than yesterday is that the data suggests the boundary sags south of
the local area Sunday through Tuesday resulting in a moist NE flow
and insitu-wedge scenario. Thus, thunder has been taken out of the
forecast for those periods. The boundary returns north as a warm
front tues and Wed allowing thunder chcs to return. Upshot will be
to keep chc pops each period under pt to mstly cldy skies for now.

Highs Sun Mon in the mid 70s NW to lwr 80s se. Highs tues Wed upr
70s to mid 80s. Lows in the 60s to near 70 se.

Aviation 06z Thursday through Monday
As of 200 am edt Wednesday...

low pressure is centered well off the mid-atlantic coast with high
pressure over eastern canada. Under mainly clear skies and light
winds due to the area of high pressure trying to ridge into the
region, patchy fog has developed from the piedmont to south-central
va. In addition, phf sby have reported some ifr lifr fog mist
during the past hour. Periods of ifr lifr visibility restrictions
due to fog will likely persist through 12z at phf, with the fog
persisting through at least 09z at sby. Elsewhere, fog should
largely stay away from the terminals for the remainder of the
night. Any remaining fog should burn off around or shortly
after 12z this morning. GOES ir satellite is showing a low cloud
deck just north and east of the lower eastern shore. This cloud
deck could possibly affect sby after after 08z tonight with
mainly bkn MVFR ceilings as it slowly moves to the sw. CIGS at
sby should then lift toVFR from by late morning or early aftn.

The onshore flow will bring enough low level moisture to allow
for bkn cloud cover at the other TAF sites from mid morning into
the mid aftn with a period of MVFR CIGS possible through
midday, generally lifting toVFR in the aftn. Winds will be ne
5-10 kt (up to 10-15 kt near the coast), shifting to the E by
the afternoon.

Outlook... High pressure slides offshore Thursday night into Friday,
skies will be mostly clear. A cold front approaches from the n
Saturday, with low pressure tracking along the boundary Saturday
night into Sunday bringing a chance of showers. High pressure builds
n of the region Sunday into Monday. Unsettled conditions are
expected Sun Mon with occasional flight restrictions possible.

As of 220 am edt Thursday...

sfc hi pres tracking slowly across new england through today
will result in NE to E winds generally 10-15 kt. Scas over the
ocean waters are for (marginal) seas of 4-5 ft. High pressure
moves offshore Thu night into Fri W the wind becoming SE then
s AOB 15kt... W seas subsiding to 3-4 ft by fri. Generally sw
winds 10-20kt Fri night into sat. A cold front crosses the
coast later Sat aftn into Sat night W the wind shifting to n
then ne. Onshore flow is expected to continue Sun into early
next week as the front stalls and sfc hi pres builds N of the
local waters.

As of 945 pm edt Wednesday...

cancelled the river flood warning for city locks. River flood
warnings continue for james river at richmond westham, the
appomattox river at mattoax, and the meherrin river at lawrenceville.

Water levels have crested and are now falling. At mattoax, the
level has dropped slightly below flood stage but is expected to
go back above flood stage Thu night Fri so will keep the warning
going. See flsakq for more site-specific details.

Tides coastal flooding
As of 220 am edt Thursday...

onshore flow will slowly push departures back up over the bay
and there is some potential for minor coastal flooding into the
eastern shore and the northern neck along the bay by the high
tide tonight early Fri morning.

Akq watches warnings advisories
Md... None.

Nc... None.

Va... None.

Marine... Small craft advisory until 10 pm edt this evening for anz650-

Small craft advisory until 4 am edt Friday for anz656-658.

Synopsis... Ajz
near term... Lkb
short term... Ajz eri
long term... Mpr
aviation... Eri lkb
marine... Ajz alb
hydrology... Akq
tides coastal flooding... Akq

Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CA2 - 8571892 - Cambridge, MD 10 mi48 min 71°F 79°F1018.5 hPa
44062 - Gooses Reef, MD 11 mi42 min SSE 7.8 G 7.8 75°F 77°F1017.7 hPa (+0.3)
COVM2 - 8577018 - Cove Point LNG Pier, MD 11 mi42 min S 7 G 8 74°F 1017.8 hPa (+0.0)
SLIM2 - 8577330 - Solomons Island, MD 17 mi42 min NNW 2.9 G 4.1 73°F 79°F1017.1 hPa (+0.0)
BISM2 - 8571421 - Bishops Head, MD 21 mi42 min ESE 7 G 8.9 73°F 81°F1017.8 hPa (+0.3)
PPTM2 - 8578240 - Piney Point, MD 30 mi48 min SW 5.1 G 5.1
TPLM2 - Thomas Point, MD 30 mi42 min NE 4.1 G 4.1 73°F 76°F1018.2 hPa (+0.3)70°F
44042 - Potomac, MD 32 mi42 min S 3.9 G 5.8 76°F 79°F1016.3 hPa (+0.0)
BSLM2 - Chesapeake Bay, MD 33 mi132 min Calm 63°F 1018 hPa63°F
44063 - Annapolis 35 mi42 min NNE 5.8 G 5.8 72°F 75°F1017.8 hPa (+0.3)
CPVM2 36 mi42 min 73°F 72°F
APAM2 - 8575512 - Annapolis, MD 37 mi42 min 71°F 1017.1 hPa (+0.4)
LWTV2 - 8635750 - Lewisetta, VA 37 mi48 min WSW 2.9 G 2.9 73°F 79°F1016.9 hPa
NCDV2 45 mi42 min Calm G 1 70°F 79°F1016.7 hPa (+0.0)

Wind History for Cambridge, MD
(wind in knots)    EDIT      (on/off)   Help
1 day
2 days

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cambridge-Dorchester Airport, MD11 mi57 minN 00.50 miFog/Mist66°F66°F100%1017.6 hPa
Patuxent River, Naval Air Station, MD17 mi1.8 hrsN 06.00 miFog/Mist71°F66°F87%1017.3 hPa
St Marys County Airport, MD21 mi54 minN 05.00 miFair66°F64°F94%1017.9 hPa
Easton / Newman Field, MD23 mi44 minN 05.00 miFog/Mist69°F68°F96%1019 hPa

Wind History from CGE (wind in knots)
Last 24hrCalmCalmN4NW4N8N10N9
1 day ago6S766
2 days agoE5E7E6E6SE12SE9SE9

Tide / Current Tables for Woolford, Church Creek, Little Choptank River, Maryland
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Cove Point (1.1 mi. NE of), Maryland Current
   EDIT      (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Wakefield, VA (3,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Dover AFB, DE
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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 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 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.