Marine Weather and Tides
7/21/2018 Trying to make page Mobile Friendly
|Sunrise 5:58AM||Sunset 8:27PM||Monday July 23, 2018 11:36 AM EDT (15:36 UTC)||Moonrise 4:14PM||Moonset 1:39AM||Illumination 81%|
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|ANZ538 Patapsco River Including Baltimore Harbor- 1032 Am Edt Mon Jul 23 2018 |
.small craft advisory in effect until 8 pm edt this evening...
.small craft advisory in effect Tuesday afternoon...
Rest of today..SE winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. A chance of tstms. A chance of showers late this morning, then occasional showers this afternoon. Vsby 1 nm or less.
Tonight..SE winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. Occasional showers and scattered tstms. Vsby 1 nm or less.
Tue..SE winds 10 to 15 kt with gusts to 25 kt. Waves 2 ft. Showers with a chance of tstms. Vsby 1 nm or less.
Tue night..SE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers with a chance of tstms.
Wed..S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers with a chance of tstms.
Wed night..S winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft. Showers likely with a chance of tstms.
Thu..SW winds around 5 kt. Waves flat. Showers likely with a chance of tstms in the morning, then a chance of showers and tstms through the night.
Fri..NW winds around 5 kt. Waves 1 ft. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms.
|ANZ500 1032 Am Edt Mon Jul 23 2018 |
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will approach from the west today and stall just to our west early to mid-week. Small craft advisory conditions are possible Tuesday night through Wednesday.
7 Day Forecast for Marine Location Near Riviera Beach, MDHourly EDIT Help
Area Discussion for - Baltimore, MD/Washington  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 klwx 231420|
area forecast discussion
national weather service baltimore md washington dc
1020 am edt Mon jul 23 2018
A broad and slow moving low pressure system over the southeast
will influence the mid atlantic through the middle of the week.
A pair of cold fronts will move through the area during the
second half of the week.
Near term through tonight
Digging upper low across the southeast and westward expansion of
the subtropical ridge will allow for deep moisture plume
sitting offshore to retrograde today and establish itself over
our area particularly along the i-95 corridor. Model signals
then shift the focus west into the central blue ridge as mid-
level winds intensify.
The 12z lwx RAOB is saturated (as can be expected) with precip
water greater than 2 inches. Flow unidirectional south, which
will support training storms. Expect efficient rainfall
production since warm cloud layer deep. Flash flood watches in
effect this afternoon and evening from i-81 corridor to the bay.
Regional radar indicates a lull in rainfall through the midday,
and have backed off on near term pops. However, a stream of
moisture resides from southeast virginia down the outer banks.
There is enough instability available that, if there is a break
in the activity (as is being realized), new showers and
thunderstorms may be able to generate. Specific timing placement
of these storms problematic. Forecast grids are intentionally
broad. However, a wet microburst could be realized.
Short term Tuesday through Wednesday night
Things get worse on Tue as moisture plume moves a bit more
inland and aims at washington dc. Model signal is stronger for
heavy rainfall with showers t-storms falling over saturated
soils. Coordination with neighboring wfos was not to issue the
flood watch for multiple days, but obviously the riks of flash
flooding will be extremely high. Wpc day ero has moderate risk
for almost the entire area.
Deep moisture plume will start shifting a bit more east on wed
with flooding threat diminishing somewhat for western areas but
remaining very high for eastern areas wed. Mid-level drying will
start taking place late Wed night with convection and risk of
flooding likely decreasing substantially after midnight wed
Long term Thursday through Sunday
By Thursday, the stubborn upper level trough that will influence our
weather much of this week should finally shear out and lift
northeastward. That will leave our area in the wake of the
weakening upper trough and ahead of a potent upper level low
centered just to the north of lake superior. Weak subsidence in the
wake of the departing upper trough could keep us dry for a change on
Thursday. The 00z deterministic GFS and euro both keep us dry
on Thursday. However, a few members of each respective ensemble
produce some precipitation. With a warm airmass in place and
dewpoints in the 60s, an afternoon shower or storm can't be entirely
ruled out. However, the trend on Thursday seems to be in favor of
On Friday, the aforementioned upper low will continue to progress to
the east across southern canada. This trough will drive a weak
surface cold front toward our area from the north. The best forcing
for ascent associated with the upper low looks to stay north of our
area. However, both the GFS and euro hint that a few storms may be
possible along and just ahead of the front. The trough has an
extensive wind field associated with it, with decent mid-upper level
flow extending down to our latitude. Currently models show around
1000 j kg of MLCAPE with 35-40 kt of 0-6 km shear Friday afternoon.
Although coverage of storms looks to be low, those parameters
suggest that if storms were to form, they could show some
Beyond Friday, model guidance begins to diverge. Temperatures should
be a few degrees cooler for the weekend in the wake of the front.
However, the front won't entirely clear low level moisture (and it's|
associated convective potential) out of the area. Both the eps and
gefs have precipitation producing members Saturday and Sunday, but
there doesn't to be a clear solution in either the deterministic or
Aviation 14z Monday through Friday
Widespread showers t-storms expected today into Wed with
training convection likely. That said, it won't be raining the
whole time. A bit of a lull ongoing this midday. New showers and
thunderstorms anticipated to develop this afternoon evening.
Specific timing placement problematic, so tafs do not contain
details. However, several round of brief local AOB ifr
Same pattern continue through wed, with the same end result:
plan for periods of AOB ifr, but no the whole time. Do not can
confidence in specifically which hours will won't have flight
restrictions. Conditions begin to improve late Wed night.
Sca conditions likely through Wed night. Mariners can expect
higher winds and waves near thunderstorms.
Repeated rounds of showers and thunderstorms through the first
half of the week will lead to increasingly susceptible
conditions for not only flash flooding but eventually some river
flooding. Solis already saturated, so it won't take much to
realize flood concerns. Flash flood watches and river related
products will likely be extended through wed, and those with
sensitive interests will want to start making plans.
Tides coastal flooding
Gusty southerly flow will continue to lead to elevated water
levels for the next several days. Multiple coastal flood
advisories are in effect through Tue morning. Coastal flood
watch issued for annapolis for the Tue morning high tide. The
overnight high tides will be favored. Daily fluctuations are
proving difficult to pinpoint though, so adjustments to the
forecast are likely.
Lwx watches warnings advisories
Dc... Flash flood watch through late tonight for dcz001.
Coastal flood advisory until 9 am edt Tuesday for dcz001.
Md... Flash flood watch through late tonight for mdz003>006-011-013-
Coastal flood advisory until 4 am edt Tuesday for mdz017.
Coastal flood advisory until 11 am edt this morning for mdz508.
Coastal flood watch from late tonight through Tuesday morning
Coastal flood advisory until 1 am edt Tuesday for mdz014.
Coastal flood advisory until 10 am edt Tuesday for mdz011.
Va... Flash flood watch through late tonight for vaz025>031-036>040-
Wv... Flash flood watch through late tonight for wvz051>053.
Marine... Small craft advisory until 6 pm edt Tuesday for anz531>534-537-
Small craft advisory until 8 pm edt this evening for anz530-
Small craft advisory from noon to 6 pm edt Tuesday for anz530-
near term... Hts lfr
short term... Lfr
long term... Kjp
aviation... Hts lfr kjp
marine... Lfr kjp
hydrology... Hts lfr
tides coastal flooding... Lfr
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|FSNM2||4 mi||36 min||SE 12 G 15||78°F||1015.6 hPa (+1.2)|
|FSKM2 - 8574728 - Francis Scott Key Bridge, MD||4 mi||36 min||SE 12 G 14||78°F||1015.4 hPa (+1.2)|
|BLTM2 - 8574680 - Baltimore, MD||8 mi||42 min||S 6 G 9.9||79°F||78°F||1015.1 hPa|
|APAM2 - 8575512 - Annapolis, MD||13 mi||42 min||80°F||1014.9 hPa|
|44063 - Annapolis||14 mi||36 min||S 9.7 G 12||79°F||78°F||1 ft||1015.9 hPa (+1.6)|
|CPVM2||14 mi||36 min||79°F||76°F|
|TCBM2 - 8573364 - Tolchester Beach, MD||16 mi||36 min||SSE 5.1 G 8.9||81°F||78°F||1016 hPa (+0.9)|
|TPLM2 - Thomas Point, MD||19 mi||36 min||SSE 11 G 13||78°F||78°F||1016.4 hPa (+1.2)||75°F|
|BSLM2 - Chesapeake Bay, MD||28 mi||126 min||SE 5.1||70°F||1014 hPa||67°F|
|WASD2 - 8594900 - Washington, DC||33 mi||36 min||SE 4.1 G 11||79°F||74°F||1015 hPa (+1.7)|
|44062 - Gooses Reef, MD||42 mi||36 min||SSE 19 G 25||79°F||1 ft||1015.2 hPa (+0.3)|
|CHCM2 - 8573927 - Chesapeake City, MD||46 mi||36 min||SE 6 G 16||82°F||79°F||1016.3 hPa (+0.7)|
|CA2 - 8571892 - Cambridge, MD||47 mi||36 min||80°F||80°F||1016.8 hPa (+0.8)|
Wind History for Francis Scott Key Bridge, MD(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Baltimore, Baltimore-Washington International Airport, MD||8 mi||42 min||ESE 7||10.00 mi||Mostly Cloudy||79°F||73°F||82%||1015.2 hPa|
|Baltimore, Inner Harbor, MD||9 mi||42 min||no data||mi||81°F||73°F||77%||1015.9 hPa|
|Annapolis, United States Naval Academy, MD||13 mi||42 min||SE 11||10.00 mi||Mostly Cloudy||81°F||73°F||79%||1015.4 hPa|
|Fort Meade / Tipton, MD||14 mi||60 min||SE 8||10.00 mi||Mostly Cloudy||77°F||71°F||83%||1016.3 hPa|
|Baltimore / Martin, MD||14 mi||51 min||ESE 6||10.00 mi||Overcast||81°F||78°F||94%||1015.9 hPa|
|Bay Bridge Field, MD||17 mi||81 min||SE 10 G 16||10.00 mi||Mostly Cloudy||81°F||73°F||79%||1015.2 hPa|
|College Park Airport, MD||24 mi||59 min||SSE 4||10.00 mi||Partly Cloudy||78°F||72°F||82%||1014.9 hPa|
Wind History from BWI (wind in knots)
|1 day ago||NE||NE||NE|
|2 days ago||SE||SE||SE|
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GOES Local Image of Mid-Atlantic EDIT
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Wind Forecast for Baltimore, MD/Washington (11,2,3,4)(on/off)  Help
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