Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Trappe, 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 6:22AMSunset 7:52PM Wednesday August 21, 2019 5:00 PM EDT (21:00 UTC) Moonrise 10:11PMMoonset 10:54AM Illumination 63% Phase: Waning Gibbous; Moon at 21 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
ANZ541 Choptank River To Cambridge Md And The Little Choptank River- 438 Pm Edt Wed Aug 21 2019
.small craft advisory in effect until midnight edt tonight...
.severe Thunderstorm watch 610 in effect until 10 pm edt this evening...
Rest of this afternoon..S winds 15 kt with gusts to 25 kt. Waves 2 ft. Scattered showers and tstms.
Tonight..SW winds 10 to 15 kt with gusts to 20 kt... Becoming W 5 to 10 kt late. Waves 1 to 2 ft. A chance of showers and tstms.
Thu..S winds 5 to 10 kt. Waves 1 ft.
Thu night..W winds 5 to 10 kt. Waves 1 ft. Scattered tstms with a chance of showers.
Fri..N winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Fri night..N winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.
Sat..NE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning.
Sun..NE winds 5 to 10 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 438 Pm Edt Wed Aug 21 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure in the atlantic will promote a light southerly flow over the region today. A cold front will approach the waters late tonight into Thursday, before stalling near or south of the area into Friday. High pressure will then settle over the area Saturday into Sunday.


7 Day Forecast for Marine Location Near Trappe, MD
   Hourly   EDIT   Help
location: 38.66, -76.08     debug


Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kphi 211954
afdphi
area forecast discussion
national weather service mount holly nj
354 pm edt Wed aug 21 2019

Synopsis
A cold front extended from low pressure in southwestern quebec
to the middle mississippi river valley this afternoon. The
boundary will progress slowly to the southeast. It is forecast
to move into our region on Thursday night before drifting to our
south on Friday. High pressure is expected to follow for the
weekend. The high should gradually lose its influence over our
weather during the early and middle parts of the new week.

Near term until 6 am Thursday morning
Heat indices for the remainder of the afternoon will be in the
mid 90s to low 100s depending on location. The heat advisory
will be allowed to expire this evening.

Mid-level forcing ascent is spreading across the northern mid-
atlantic and southern new england this afternoon. CAPE values
are also jumping up along side of strengthening shear. A severe
thunderstorm watch in effect until 1000 pm for our forecast
area.

Damaging winds will be the main threat across this area,
although there will be a threat for hail with a fair amount of
cape above the freezing level. Another concern this afternoon
will be the potential for heavy rainfall. Pw values remain
1.75-2.00 inches, so any thunderstorm will be efficient rain
producers.

Things will settle down overnight. The second half of the
overnight looks dry. Temperatures will fall back into the mid
60s to mid 70s depending on location. Some patchy fog is
possible, especially across those locales that see any rain into
the evening hours.

Winds will become less than 10 mph and veer to the west.

Short term 6 am Thursday morning through 6 pm Thursday
As a result of the winds veering to the west (at least 1st half
of day), dewpoints are forecast to be a few degrees lower
tomorrow. And with the lower dewpoints, we are seeing lower
apparent temperatures. The i95 corridor and nj coastal plain
will see apparent temperatures in the mid to upper 90s. The
delmarva will see apparent temperatures around 100. While it
will still be quite hot, these values are below heat advisory
criteria. We will not issue an advisory at this time. Actual air
temperatures are forecast to be around 80 across the poconos,
the upper 80s across berks and the lehigh valley, around 90
across the i95 corridor and coastal plain, and in the mid to
upper 80s near the ocean.

A cold front will be knocking on our doorstep tomorrow morning.

By days end, it should be slowly working across east central pa
and northern nj. A weak low could be riding along the front as
we head into the evening hours. With better forcing tomorrow,
more organized precipitation is possible. Per the SPC convective
outlook, at this time, the area remains under a marginal risk.

Per wpc, the area remains under a marginal risk for excessive
rainfall.

Winds should be 10 mph or less for most tomorrow. While they
are expected to turn more westerly tonight, they should back to
southwest again tomorrow afternoon as the cold front approaches.

Of course, winds could be stronger in and in the vicinity of
storms.

Long term Thursday night through Wednesday
The cold front approaching from the northwest is forecast to
move into our region on Thursday evening. Showers and
thunderstorms ahead of and with the front will produce locally
heavy rain on Thursday evening. Also, there remains a chance for
isolated strong wind gusts and hail.

As the cold front settles in our region on Thursday night,
showers and thunderstorms will linger. However, the potential
for heavy rain, strong wind gusts and hail should diminish from
northwest to southeast as conditions stabilize somewhat.

The front is expected to be across the DELMARVA region on
Friday morning, and it should continue to sink slowly to the
south. We will continue to mention a chance of showers and
thunderstorms for Friday, especially from the philadelphia
metropolitan area southward.

High pressure is expected to be centered in ontario on Friday
night. The high should build east and southeastward over the
weekend, bringing dry weather and cooler temperatures to our
region. A northeast to east flow is forecast to develop by
Sunday. While some of the guidance is showing some spotty light
precipitation for Sunday, it may be a case where the effects of
the trajectory off the ocean are overdone. Perhaps the indicated
moisture will only manifest itself in the form of some cloud
cover.

As the high moves farther away from our region, a trailing
surface ridge to the lee of the appalachians is expected to
narrow on Monday before gradually losing its influence over our
weather on Tuesday and Wednesday. Guidance consensus regarding
the timing and coverage of any precipitation during the early
and middle parts of the new week is lacking. As a result, we
have included only a slight chance for showers and
thunderstorms.

Aviation 20z Wednesday through Monday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Tonight... Showers and thunderstorms will be possible this
evening, before diminishing overnight. Lower ceilings and vsbys
are possible with any shower or thunderstorm. In addition,
patchy fog may develop overnight, especially where rainfall
occurs during the afternoon and evening hours. A mix ofVFR and
MVFR conditions are expected through daybreak.

Thursday... MainlyVFR, though brief restrictions may occur in
morning fog and afternoon showers storms. West to southwest
winds up to 10 kt are expected.

Outlook...

Thursday evening... Showers and thunderstorms with MVFR and ifr
conditions. The rain may be heavy at times. Southwest to west
wind 5 to 10 knots.

Thursday night... MainlyVFR. A chance of showers and
thunderstorms with locally MVFR and ifr conditions. Northwest
wind 5 to 10 knots.

Friday... MainlyVFR. A chance of showers and thunderstorms,
mainly from the kphl area southward. Northwest wind 5 to 10
knots.

Friday night... MainlyVFR. A chance of showers and
thunderstorms around kilg, kmiv and kacy. North wind 10 knots or
less.

Saturday... MainlyVFR. North to northeast wind 5 to 10 knots.

Saturday night... MainlyVFR. Northeast wind 10 knots or less.

Sunday... MainlyVFR. Northeast to east wind around 10 knots.

Sunday night... MainlyVFR. Northeast wind 5 to 10 knots.

Monday... MainlyVFR. Northeast to east wind around 10 knots.

Marine
Tonight... A SCA is in effect through 10 pm on the lower de bay
and through 4 am on the ocean. Winds are expected to gust to 25
kt. Seas are expected to build up to 4 feet. Both winds and seas
will diminish the second half of the night.

Thursday... Sub-sca conditions are expected.

Outlook...

Thursday night through Saturday night... No marine headlines are
anticipated.

Sunday through Monday... A northeasterly wind 15 to 20 knots
with gusts around 25 knots should cause wave heights on our
ocean waters to build to 5 or 6 feet.

Rip currents...

with winds 15-20 knots on the ocean, and seas building to 4-5
feet with a period of 6-8 seconds, the rip current remains
moderate for new jersey, but low for delaware.

Similar conditions are anticipated for Thursday.

Phi watches warnings advisories
Pa... Heat advisory until 8 pm edt this evening for paz070-071-102-
104-106.

Nj... Heat advisory until 8 pm edt this evening for njz010-012-013-
015-017>020-027.

De... Heat advisory until 8 pm edt this evening for dez001.

Md... None.

Marine... Small craft advisory until 2 am edt Thursday for anz450>455.

Small craft advisory until 10 pm edt this evening for anz431.

Synopsis... Iovino
near term... Kruzdlo
short term... Kruzdlo
long term... Iovino
aviation... Iovino 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
CA2 - 8571892 - Cambridge, MD 6 mi60 min S 9.9 G 15 87°F 84°F1012.6 hPa (-1.8)
44062 - Gooses Reef, MD 19 mi30 min S 14 G 18 83°F 1013.1 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 24 mi60 min S 18 G 20 82°F 1013.3 hPa (-2.0)
TPLM2 - Thomas Point, MD 25 mi60 min SE 19 G 21 83°F 83°F1012.7 hPa (-1.8)78°F
CPVM2 28 mi60 min 84°F 80°F
BISM2 - 8571421 - Bishops Head, MD 30 mi66 min S 14 G 18 82°F 87°F1013.6 hPa
APAM2 - 8575512 - Annapolis, MD 31 mi60 min 88°F 1011.2 hPa (-1.5)
SLIM2 - 8577330 - Solomons Island, MD 31 mi60 min S 11 G 13 85°F 84°F1012.2 hPa (-1.9)
BSLM2 - Chesapeake Bay, MD 34 mi150 min S 7 89°F 1012 hPa73°F
TCBM2 - 8573364 - Tolchester Beach, MD 39 mi60 min S 9.9 G 16 86°F 85°F1011.8 hPa (-1.7)
PPTM2 - 8578240 - Piney Point, MD 44 mi60 min S 7 G 8.9
DRSD1 - Delaware Reserve, DE 45 mi150 min S 8.9 91°F 1013 hPa75°F
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 45 mi60 min SSE 16 G 19 86°F 1011.1 hPa (-1.7)
FSNM2 45 mi66 min SSE 12 G 14 86°F 1011.4 hPa

Wind History for Cambridge, MD
(wind in knots)    EDIT      (on/off)   Help
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
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
Last
24hr
SE2
SE4
E6
S3
W4
G7
W4
G7
SW9
G13
SW3
G7
SE2
S3
SW4
G7
SW3
SE2
SE3
SE4
S4
SW8
G13
S8
G11
S8
G14
S12
G16
S8
G14
S12
G19
S10
G14
S10
G15
1 day
ago
S8
G14
NE11
G17
N6
SE2
S5
SE3
S2
--
W3
G6
SW2
S1
N3
S3
SW2
--
N3
NE4
NE6
NE6
G9
NE8
NE6
NE5
SE13
G23
NE9
2 days
ago
S7
G10
SW8
S4
G7
S4
SE4
S4
SE5
SE5
G8
SE8
S4
SE3
S4
S4
G7
S2
G5
S5
S7
S5
G9
S6
G11
SW6
G9
NW11
G14
NW10
W5
G8
SW6
G9
SW5
G10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Cambridge-Dorchester Airport, MD9 mi80 minVar 6 G 1410.00 miPartly Cloudy90°F75°F63%1012.9 hPa
Easton / Newman Field, MD10 mi70 minS 8 G 1610.00 miMostly Cloudy91°F75°F59%1014.2 hPa

Link to 5 minute data for KCGE

Wind History from CGE (wind in knots)
6
PM
7
PM
8
PM
9
PM
10
PM
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
Last 24hrS5CalmCalmCalmCalmCalm5CalmCalmCalmCalmCalmCalmCalmSE3CalmS85
G11
5
G12
SW8S6
G12
S10
G17
S8
G18
S10
G15
1 day agoS11E11
G16
CalmSE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm3E6SE4E4E5NE4E10
G16
NE9
G19
2 days ago544S3CalmCalmSE3SE4SE3S4CalmSE4CalmCalmCalm4SW7456SW8SW6
G13
SW7S5

Tide / Current Tables for Oxford, Tred Avon River, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Oxford
Click for Map
Wed -- 02:37 AM EDT     1.04 feet Low Tide
Wed -- 06:23 AM EDT     Sunrise
Wed -- 07:55 AM EDT     1.91 feet High Tide
Wed -- 11:54 AM EDT     Moonset
Wed -- 02:30 PM EDT     0.53 feet Low Tide
Wed -- 07:51 PM EDT     Sunset
Wed -- 08:52 PM EDT     2.15 feet High Tide
Wed -- 11:11 PM EDT     Moonrise
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
1.41.21.11.11.21.41.61.81.91.81.61.310.70.60.60.711.41.82.12.12.11.9

Tide / Current Tables for Cove Point (1.1 mi. NE of), Maryland Current
   EDIT      (on/off)   Help   One Week of Data
Cove Point (1.1 mi. NE of)
Click for Map
Wed -- 02:01 AM EDT     -0.42 knots Max Ebb
Wed -- 04:53 AM EDT     0.00 knots Slack
Wed -- 06:25 AM EDT     Sunrise
Wed -- 07:24 AM EDT     0.36 knots Max Flood
Wed -- 10:13 AM EDT     -0.00 knots Slack
Wed -- 11:54 AM EDT     Moonset
Wed -- 01:53 PM EDT     -0.45 knots Max Ebb
Wed -- 04:47 PM EDT     0.00 knots Slack
Wed -- 07:51 PM EDT     Sunset
Wed -- 07:56 PM EDT     0.58 knots Max Flood
Wed -- 11:12 PM EDT     Moonrise
Wed -- 11:39 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
-0.2-0.4-0.4-0.4-0.200.20.40.30.20-0.1-0.3-0.4-0.4-0.4-0.20.10.30.50.60.50.30.1

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 Philadelphia/Mount Holly, PA (17,4,5,8)
      (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.