Friday, August23, 2019 L-36.com


Marine Weather and Tides
Cape St. Claire, MD

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:25AMSunset 7:52PM Friday August 23, 2019 2:41 AM EDT (06:41 UTC) Moonrise 11:20PMMoonset 12:57PM Illumination 48% Phase: Third Quarter Moon; Moon at 22 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
ANZ531 Chesapeake Bay From Pooles Island To Sandy Point- 135 Am Edt Fri Aug 23 2019
Overnight..NW winds 5 kt. Waves less than 1 ft. Scattered showers with isolated tstms.
Fri..N winds 5 to 10 kt. Waves 1 ft. Numerous showers.
Fri night..N winds 5 to 10 kt. Waves 1 to 2 ft.
Sat..NE winds 5 to 10 kt. Waves 1 to 2 ft.
Sat night..NE winds 5 to 10 kt. Waves 1 ft.
Sun..NE winds 5 to 10 kt. Waves 1 ft.
Sun night..NE winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft.
Mon..E winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers.
Tue..SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 135 Am Edt Fri Aug 23 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will approach the waters tonight, then stall over the carolinas on Saturday. High pressure will then settle over the area Saturday into Sunday. Small craft advisories are possible over the southern waters Friday night through Sunday .


7 Day Forecast for Marine Location Near Cape St. Claire CDP, MD
   Hourly   EDIT   Help
location: 39.09, -76.35     debug


Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kphi 230436
afdphi
area forecast discussion
national weather service mount holly nj
1236 am edt Fri aug 23 2019

Synopsis
A slow moving cold front will track through the forecast area
tonight into Friday. The front will settle well to our south through
early next week as high pressure builds to our north. The high will
retreat northward on Wednesday as low pressure lifts northward off
the eastern seaboard and a cold front approaches the region from the
west. The cold front is then forecast to move into the mid-atlantic
region late next week.

Near term until 6 am this morning
1230 am update: showers have redeveloped from long island west-
southwest to the harrisburg area. Some of these showers have
occasionally produced lightning. Meanwhile, the precipitation
upstream of the line of storms moving through DELMARVA and
southern new jersey has featured fairly frequent anvil
lightning. For these reasons, increased pops the rest of the
night across the area and maintained isolated thunder mention as
well.

Moisture-channel imagery indicates a couple of vorticity maxima
are associated with the current convection. The first is
approaching the coast, with the precipitation likely to move
offshore with it in the next 2 to 3 hours. However, another
perturbation is expected to strengthen as large-scale ascent
increases downstream of a digging shortwave trough to the north.

As such, expect the showers along the i-78 corridor to remain
for much of the night as they slowly migrate eastward.

Temperature forecast remains unchanged for now, given the quite
heterogeneous chaotic behavior associated with the
precipitation.

Short term 6 am this morning through 6 pm Saturday
1230 am update: I expanded pops northward given initial glance
at 00z guidance. Would not be surprised to see fairly widespread
precipitation along south of the i-76 corridor this afternoon
with more scattered precipitation extending as far north as the
i-78 corridor. This will be somewhat dependent on convection
farther south, which may ultimately dampen coverage in our area
as descent surrounding the more-widespread precipitation
develops. However, hi-res models are virtually unanimous in
providing another round of storms near south of philadelphia.

Previous discussion...

the cold front is forecast to extend across far southern new jersey,
central delaware and adjacent areas of northeastern maryland around
daybreak on Friday. It expected expected to drift southward,
reaching the virginia capes late in the day. The slow movement of
the boundary will translate into a very gradual improving trend from
north to south in our region on Friday.

We will keep a chance of showers from the philadelphia metropolitan
area and southern new jersey southward for Friday morning. We will
limit the mention of showers to areas from about dover de and ocean
city nj southward for the afternoon. It appears as though any
substantial instability will have drifted to our south by Friday
morning, so we will not include any thunder.

It should remain mostly cloudy across northeastern maryland,
delaware and southern new jersey through the day. However, some
clearing from the northwest and north is anticipated for eastern
pennsylvania, and for northern and central new jersey.

The wind is expected to be from the northwest and north around 10
mph. Temperatures will be considerably cooler than those of recent
days with highs mostly in the 80 degree neighborhood. Readings will
likely not get above the lower and middle 70s in the elevated
terrain on the poconos and far northern new jersey.

Long term Saturday night through Thursday
The long term forecast will begin with below normal
temperatures and more comfortable dewpoints and end with normal
to above normal temperatures and greater chances of convectively
driven precipitation.

For Friday night, lingering showers and thunderstorms could remain
across southern new jersey, and southern delaware and maryland. Pw
values remain near 2.0 inches, so some locally heavy rain is
possible.

Saturday could end up the better of weekend days as high pressure
builds well to our north across eastern canada and winds just start
to turn onshore. Temperatures will be below normal.

The period between Sunday and Tuesday, could see more cloud cover
and light precipitation. This is due to a persistent onshore flow.

Guidance, for a couple of days now, is showing precipitation for
this period. However onshore flow can manifest itself in a number
ways... Low clouds, fog, drizzle or light rain. At a minimum, expect
some cloud cover along the coastal plain.

As we move into Wednesday and Thursday, unsettled weather should
return to the area. An area of low pressure is forecast to be
lifting northward offshore of the east coast, while a cold front
approaches from the west. Showers and thunderstorms are likely to
develop as the cold front nears the forecast area.

Aviation 06z Friday through Tuesday
The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg,
kmiv, kacy and surrounding areas.

Rest of tonight... MainlyVFR, though brief sub-vfr conditions
may occur in showers, especially at rdg abe ttn and miv acy.

Cannot rule out lightning, at least at miv acy through 09z or
so. Winds will be light but erratic.

Friday... MainlyVFR, but there is a chance of more storms
near south of phl, especially during the afternoon. Brief sub-
vfr conditions may occur. Winds becoming northwest or north
around 10 kts.

Outlook...

Friday night...VFR except MVFR possible across southern nj, southern
de, and the eastern shore of md due to showers and thunderstorms. N
to NE winds mainly 5 to 10 kts.

Saturday-Saturday night... MainlyVFR conditions expected. MVFR
conditions possible at kacy and kmiv Saturday night as an onshore
flow generates some clouds. Winds generally NE 5-10 knots.

Sunday... MainlyVFR conditions expected. MVFR conditions possible at
kacy and kmiv as an onshore flow generates some clouds drizzle light
rain. NE winds 5-10 kts with gusts up to 20 knots possible.

Sunday night-Tuesday... More widespread MVFR conditions developing
with the persistent onshore flow. E to NE winds 5-10 kts with gusts
up to 20 kts possible.

Marine
A south to southwest wind 10 to 15 knots this evening, becoming
northwest to north around 10 knots overnight. North wind around 10
knots on Friday, becoming variable 10 knots or less late in the day.

Waves on our ocean waters are forecast to be around 2 to 3 feet.

Waves on delaware bay are expected to be 2 feet or less.

Outlook...

Friday night-Saturday... Sub-sca conditions expected much of the
period. Low end SCA conditions possible late Saturday.

Saturday night... Low end SCA conditions possible due to long fetch e
to NE winds developing.

Sunday-Tuesday... A prolonged low end SCA may be needed through the
period as long fetch E to NE winds persist.

Rip currents...

a northerly wind around 10 mph is expected for Friday. Breaking
waves around 2 to 3 feet are likely along with a medium period
southerly swell. A low risk is forecast.

A long duration northeast to east wind is expected for the weekend
and into the early part of the new week. As a result, we are
anticipating a prolonged period with an enhanced risk for the
development of dangerous rip currents from Saturday through at
least Tuesday.

Phi watches warnings advisories
Pa... None.

Nj... None.

De... None.

Md... None.

Marine... None.

Synopsis... Kruzdlo
near term... Cms
short term... Cms iovino
long term... Kruzdlo
aviation... Cms kruzdlo
marine... Iovino kruzdlo


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
CPVM2 7 mi60 min 78°F 78°F
APAM2 - 8575512 - Annapolis, MD 10 mi54 min 78°F 1012.8 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 10 mi60 min S 1.9 G 2.9 72°F 84°F1013.7 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 13 mi60 min W 1.9 G 2.9 75°F 1013.6 hPa
FSNM2 13 mi66 min W 2.9 G 4.1 74°F 1013.6 hPa
TPLM2 - Thomas Point, MD 14 mi42 min S 12 G 14 78°F 83°F1014.3 hPa (-1.0)74°F
BLTM2 - 8574680 - Baltimore, MD 17 mi60 min WSW 2.9 G 5.1 74°F 84°F1013.2 hPa
BSLM2 - Chesapeake Bay, MD 29 mi132 min S 2.9 77°F 1014 hPa70°F
44062 - Gooses Reef, MD 37 mi42 min W 9.7 G 14 78°F 1014.7 hPa
CA2 - 8571892 - Cambridge, MD 39 mi60 min S 2.9 G 4.1 75°F 85°F1013.6 hPa
WASD2 - 8594900 - Washington, DC 39 mi60 min SSW 5.1 G 8 78°F 85°F1013.7 hPa
CHCM2 - 8573927 - Chesapeake City, MD 42 mi60 min NNW 1.9 G 2.9 73°F 85°F1013.4 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 48 mi54 min SW 7 G 8.9 77°F 1014.5 hPa
DRSD1 - Delaware Reserve, DE 48 mi132 min Calm 71°F 1014 hPa71°F

Wind History for Tolchester Beach, MD
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
Last
24hr
SW7
G10
W9
G12
W10
W8
W10
G13
NW12
G15
NW11
G14
W8
NW5
W8
SW8
SW7
SW7
SW5
G10
SW7
SW10
S5
G9
S4
G8
S4
N20
G28
N11
G14
E6
SE4
SE3
1 day
ago
SW13
W12
G15
SW6
S4
SE2
S4
G8
S6
G9
SW11
G16
SW11
SW7
S8
G14
S7
G14
S6
G13
S9
G15
S10
G16
S8
G15
SW9
G13
S7
G11
W3
S4
G7
SW11
W5
G8
W7
W7
2 days
ago
E1
E2
E2
NE1
E4
G7
NE2
G6
E3
G6
N8
N9
NW6
NW7
NW3
SE8
G13
SE4
SE2
SE3
SW10
G14
S4
G10
SW2
G5
S6
G11
S6
G11

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay Bridge Field, MD8 mi4.7 hrsN 9 G 1710.00 miThunderstorm75°F69°F83%1014.2 hPa
Annapolis, United States Naval Academy, MD10 mi1.8 hrsS 310.00 miFair79°F71°F77%1013.6 hPa
Baltimore / Martin, MD18 mi4.7 hrsN 07.00 miThunderstorm Light Rain72°F71°F100%1014.9 hPa
Baltimore, Baltimore-Washington International Airport, MD18 mi1.8 hrsSW 310.00 miMostly Cloudy72°F70°F94%1013.6 hPa
Baltimore, Inner Harbor, MD19 mi1.8 hrsno data mi73°F71°F94%1013.9 hPa
Fort Meade / Tipton, MD22 mi4.6 hrsN 03.00 miOvercast72°F69°F94%1014.9 hPa

Link to 5 minute data for KBWI

Wind History from BWI (wind in knots)
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
12
AM
1
AM
2
AM
Last 24hrW3S3W4W4W4W4W6W7
G18
W7SW11
G14
W11W10
G14
W11
G15
SW8W9S8S4S6NW20
G25
4CalmS4SW3NW3
1 day agoSW3W5CalmSE3CalmCalmS5SW8S8SW8
G15
SW8S8SW10
G14
SW9S8S3SW9
G18
SW8CalmSW5W3CalmW4SW4
2 days agoW3SW4W3CalmCalmNE3NE5E8E86E9E8E7E9SE11S11
G16
W8SW10S7SW3CalmS7W6SW3

Tide / Current Tables for Baltimore (Chesapeake Bay), Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Baltimore (Chesapeake Bay)
Click for Map
Fri -- 12:51 AM EDT     5.64 feet High Tide
Fri -- 06:25 AM EDT     Sunrise
Fri -- 07:53 AM EDT     4.80 feet Low Tide
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 12:28 PM EDT     5.23 feet High Tide
Fri -- 01:57 PM EDT     Moonset
Fri -- 06:32 PM EDT     4.36 feet Low Tide
Fri -- 07:49 PM EDT     Sunset
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
5.65.65.65.45.25.14.94.84.84.955.15.25.25.14.94.74.54.44.44.54.755.3

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
   EDIT      (on/off)   Help   One Week of Data
Baltimore Harbor Approach
Click for Map
Fri -- 03:01 AM EDT     -0.00 knots Slack
Fri -- 06:07 AM EDT     -0.64 knots Max Ebb
Fri -- 06:25 AM EDT     Sunrise
Fri -- 09:40 AM EDT     0.00 knots Slack
Fri -- 10:58 AM EDT     Last Quarter
Fri -- 11:57 AM EDT     0.30 knots Max Flood
Fri -- 01:57 PM EDT     Moonset
Fri -- 02:17 PM EDT     -0.00 knots Slack
Fri -- 05:35 PM EDT     -0.55 knots Max Ebb
Fri -- 07:49 PM EDT     Sunset
Fri -- 08:29 PM EDT     0.00 knots Slack
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
0.80.60.40-0.3-0.5-0.6-0.6-0.4-0.20.10.20.30.20.1-0.2-0.4-0.5-0.5-0.4-0.20.20.50.8

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES Local Image of Mid-Atlantic    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 Philadelphia/Mount Holly, PA (2,6,7,8)
      (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.