Tuesday, December18, 2018 L-36.com


Marine Weather and Tides
Annapolis, 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 7:18AMSunset 4:47PM Tuesday December 18, 2018 10:56 PM EST (03:56 UTC) Moonrise 2:08PMMoonset 2:32AM Illumination 88% Phase: Waxing Gibbous; Moon at 11 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
ANZ532 Chesapeake Bay From Sandy Point To North Beach- 936 Pm Est Tue Dec 18 2018
Rest of tonight..NW winds 5 kt. Waves less than 1 ft.
Wed..S winds 5 to 10 kt. Waves 1 ft.
Wed night..S winds 5 to 10 kt. Waves 1 ft.
Thu..E winds 5 to 10 kt. Waves 1 ft. Rain.
Thu night..SE winds 10 to 15 kt with gusts to 25 kt. Waves 2 to 3 ft. Rain.
Fri..S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers.
Fri night..SW winds 10 to 15 kt. Gusts up to 20 kt. Waves 2 ft. A chance of showers.
Sat..W winds 10 to 15 kt. Waves 3 ft...subsiding to 1 ft after midnight.
Sun..W winds 5 to 10 kt. Waves 1 ft.
ANZ500 936 Pm Est Tue Dec 18 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build into the region and linger through Wednesday. The next low pressure system will approach from the southeastern united states late Thursday and cross the region Friday. Gale conditions are possible Thursday night through Saturday.


7 Day Forecast for Marine Location Near Annapolis, MD
   Hourly   EDIT   Help
location: 38.97, -76.49     debug


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 klwx 190205
afdlwx
area forecast discussion
national weather service baltimore md washington dc
905 pm est Tue dec 18 2018

Synopsis
High pressure will be in place through Wednesday. A large area
of low pressure will impact the region Thursday and Friday.

Surface high pressure will move back towards the region by late
Saturday.

Near term through Wednesday night
High pressure will be in control through Wed night. With the
center of the high nearby tonight and only some thin cirrus
clouds passing by, radiational cooling should be efficient. Some
outlying areas have already dropped into the 20s. Lows will be
in the lower to mid 20s in most areas, with lower 30s in the
urban and nearshore areas.

Highs Wed a little warmer than today but seasonable in the mid
40s. Not as cold Wed night due to increased cloud cover ahead of
next storm system.

Short term Thursday through Thursday night
Very potent storm system will be affecting the east coast thu
night into Sat with potentially record slp values over our area for
the month of december with values fcst to be less than 990 mb.

There is a low, but non-zero threat that if precipitation moves
in early enough on Thursday, there could be some light freezing
rain in areas west of the blue ridge.

This system will be accompanied by a strong warm conveyor belt
bringing pw values over 1.5 inches which are near 400% or
nearly +4 stds of normal. Widespread heavy rainfall of 1.5 to
2.5 inches is expected with isold higher amts. Given saturated
soils from last weekend's rain and potentially intense rainfall
rates and training convection, flash flooding threat appears
very high with this event. A severe threat may also exist due to
strong low-level wind fields (i.E. 60kt 850 mb low- level jet)
particularly east of the blue ridge mtns. Best chance for heavy
rainfall and flooding threat is from 7pm Thu through about 10am
fri. See long term discussion below.

Long term Friday through Tuesday
Strong cold front will be crossing the region Friday. Convective
elements producing gusty winds and heavy rain will be possible
thanks to anomalously strong low level jet and very high pw's. Both
flash flooding and severe weather may be concerns.

After the front passes, strong pressure gradient as the low pressure
pushes up to southern canada will remain over our region, resulting
in a gusty wind and potentially wind advisory criteria (50 mph
gusts). This will extend from late Friday into Saturday. Upslope
snow showers will be another concern, with advisory level snow
potential along our westernmost zones.

After that, high pressure builds to the south later Saturday through
Sunday, with much more tranquil weather. A weak system then passes
Monday, but with little forcing and limited moisture, precip should
be extremely limited and will likely be restricted to upslope higher
terrain locations. Another high pressure will dominate for Monday
night and Tuesday with benign christmas weather expected.

With a relatively zonal flow in place, temperatures will be near
normal, perhaps even a little on the plus side, through the long
term.

Aviation 02z Wednesday through Sunday
Vfr through 12z Thu with only high clouds. Nearly calm winds
tonight, becoming southerly 5-8 kt on Wednesday as high pressure
moves east. Flight restrictions (with some ifr) likely thu
afternoon through Thu night in moderate to heavy rainfall. Llws
also possible.

Heavy rain and gusty winds are a concern Friday, with potential for
gusty winds continuing into Saturday. Sub-vfr CIGS vis probable
Friday, but should improve toVFR by Saturday.

Marine
Winds have diminished under 10 kt this evening as high pressure
moves over the region. Sub-sca conditions expected through thu
with winds strengthening again Thu night with potential gales
through sat.

Strong front will bring potential for gusty showers, potentially up
to special marine warning criteria, Friday, then gales are possible
behind the front Friday night into Saturday.

Hydrology
River flooding has ended for now, with continued falling stages
are expected through thu. Widespread rainfall amounts of 1 to 2
inches are expected Thu night into Friday. Renewed river
flooding appears likely Thu night through sat. Given high stream
levels and saturated ground, flooding will likely be reached
more quickly than the last system. Flash flood watch will
likely be required by this time tomorrow.

Tides coastal flooding
Anomalies will be increasing again Thursday night and Friday
with potential coastal flooding Thu night and fri.

Climate
Rainfall totals continue to creep upward, with baltimore md and
washington dc setting the annual record already. Here are the
current rankings for wettest year on record (through december
17th):
washington dc area (dca)
1. 64.22 inches (2018)
2. 61.33 inches (1889)
weather records for the washington dc area have been kept at
what is now ronald reagan washington national airport (dca)
since 1945. Precipitation records observed downtown extend the
period of record back to 1871.

Baltimore md area (bwi)
1. 68.82 inches (2018)
2. 62.66 inches (2003)
weather records for the baltimore md area have been kept at
what is now baltimore-washington international thurgood marshall
airport (bwi) since 1950. Precipitation records observed
downtown extend the period of record back to 1871.

Dulles va area (iad)
1. 65.67 inches (2003)
2. 64.36 inches (2018)
3. 59.05 inches (1972)
weather records have been kept at what is now washington dulles
international airport (iad) since 1960.

Note: all climate data are considered preliminary until
reviewed by the national centers for environmental information
(ncei).

Lwx watches warnings advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... None.

Synopsis... Lfr
near term... Ads lfr
short term... Ads lfr
long term... Rcm
aviation... Ads rcm lfr
marine... Ads rcm lfr
hydrology... Lfr ads
tides coastal flooding... Lfr
climate... Lwx


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
APAM2 - 8575512 - Annapolis, MD 1 mi56 min 35°F 1022.2 hPa (+0.4)
TPLM2 - Thomas Point, MD 6 mi56 min W 5.1 G 6 39°F 43°F1023.4 hPa (+0.4)26°F
CPVM2 6 mi56 min 39°F 23°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 17 mi56 min W 5.1 G 7 39°F 1022.5 hPa (+0.4)
BSLM2 - Chesapeake Bay, MD 17 mi146 min Calm 31°F 1022 hPa27°F
FSNM2 17 mi62 min WNW 8.9 G 9.9 39°F 1021.8 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 21 mi56 min Calm G 5.1 35°F 43°F1022.7 hPa (+0.4)
BLTM2 - 8574680 - Baltimore, MD 21 mi62 min WSW 1.9 G 5.1 38°F 47°F1022.2 hPa
WASD2 - 8594900 - Washington, DC 29 mi56 min Calm G 1.9 39°F 42°F1022.8 hPa (+0.3)
CA2 - 8571892 - Cambridge, MD 35 mi62 min 36°F 42°F1022.7 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 40 mi56 min NNW 2.9 G 5.1 40°F 1023.3 hPa (+0.4)
SLIM2 - 8577330 - Solomons Island, MD 45 mi56 min NNW 1 G 1.9 36°F 43°F1022.5 hPa (+0.4)

Wind History for Francis Scott Key Bridge NE Tower, MD
(wind in knots)    EDIT      (on/off)   Help
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
-12
PM
-12
PM
10
PM
Last
24hr
W19
G24
W14
G18
NW14
G18
NW22
NW20
NW16
G22
NW18
G22
NW16
G20
W14
G17
W17
NW18
NW17
G21
NW19
NW15
G20
W13
G16
NW11
G16
W15
NW16
W11
G14
NW11
W6
W9
1 day
ago
NW9
W11
W9
W7
W10
W11
W10
W8
W10
W8
G13
W16
G23
W16
G20
W16
G21
W22
W19
G23
NW19
G24
NW29
NW24
NW23
NW24
G29
NW15
G22
N20
NW25
2 days
ago
NE16
G22
NE15
G19
NE10
G13
NE15
NE17
G24
NE15
G22
NE14
G20
NE13
G18
NE13
NE11
G15
N14
G17
N11
N13
G17
N13
G17
N14
G17
N15
G20
N15
G19
NW17
NW16
NW17
NW17
NW15
NW14

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Annapolis, United States Naval Academy, MD1 mi62 minN 010.00 miFair35°F25°F67%1022.9 hPa
Bay Bridge Field, MD8 mi76 minW 510.00 miFair39°F26°F61%1022.7 hPa
Fort Meade / Tipton, MD17 mi74 minN 010.00 miFair28°F26°F93%1023.4 hPa
Baltimore, Baltimore-Washington International Airport, MD18 mi62 minN 010.00 miFair30°F23°F75%1022.4 hPa
Camp Springs / Andrews Air Force Base, MD22 mi2 hrsN 010.00 miFair29°F23°F77%1023 hPa
Baltimore, Inner Harbor, MD22 mi62 minno data mi39°F21°F48%1022.3 hPa
College Park Airport, MD23 mi73 minN 010.00 miFair29°F23°F81%1022.7 hPa

Wind History from NAK (wind in knots)
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
Last 24hrNW9NW12
G19
NW9NW7NW7NW9NW10
G21
NW9
G17
NW8
G17
W6NW7
G17
NW9
G22
NW11NW11NW12
G18
NW8NW7NW8NW4CalmCalmN3NW3Calm
1 day agoNW6W5W5W5W3NW3W4CalmW6W45W9W12
G22
W9
G18
W12
G20
W9
G16
W13
G21
NW9
G18
NW10
G21
NW8NW12
G19
NW6NW10
G23
NW11
2 days agoNE6NE5N4N6NE8NE12
G27
NE10N7NE8N5N10N10N11N10N11N11NW11NW10NW13
G19
NW10NW10NW8NW7NW5

Tide / Current Tables for Annapolis, Maryland
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Annapolis
Click for Map
Tue -- 12:53 AM EST     0.71 feet High Tide
Tue -- 02:32 AM EST     Moonset
Tue -- 07:07 AM EST     -0.11 feet Low Tide
Tue -- 07:19 AM EST     Sunrise
Tue -- 02:06 PM EST     0.91 feet High Tide
Tue -- 02:08 PM EST     Moonrise
Tue -- 04:45 PM EST     Sunset
Tue -- 08:04 PM EST     0.16 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.70.70.70.50.30.1-0-0.1-0.10.10.30.50.70.80.90.90.70.50.40.20.20.20.30.4

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
   EDIT      (on/off)   Help   One Week of Data
Baltimore Harbor Approach
Click for Map
Tue -- 01:25 AM EST     0.41 knots Max Flood
Tue -- 02:32 AM EST     Moonset
Tue -- 03:53 AM EST     -0.00 knots Slack
Tue -- 07:12 AM EST     -0.68 knots Max Ebb
Tue -- 07:19 AM EST     Sunrise
Tue -- 10:09 AM EST     0.00 knots Slack
Tue -- 01:47 PM EST     0.99 knots Max Flood
Tue -- 02:07 PM EST     Moonrise
Tue -- 04:45 PM EST     Sunset
Tue -- 05:20 PM EST     -0.00 knots Slack
Tue -- 08:28 PM EST     -0.79 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.30.40.40.2-0-0.3-0.6-0.7-0.6-0.4-0.10.30.70.910.90.50.1-0.3-0.6-0.8-0.8-0.6-0.3

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
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 Baltimore, MD/Washington (22,6,7,8)
      (on/off)   Help

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

Ad by Google

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.