Monday, October18, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Cecilton, MD

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:15AMSunset 6:20PM Monday October 18, 2021 3:43 PM EDT (19:43 UTC) Moonrise 4:48PMMoonset 4:05AM Illumination 94% Phase: Waxing Gibbous; Moon at 13 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
ANZ530 Chesapeake Bay North Of Pooles Island- 135 Pm Edt Mon Oct 18 2021
.small craft advisory in effect through Tuesday afternoon...
This afternoon..NW winds 20 kt with gusts to 30 kt. Waves 2 ft.
Tonight..NW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.
Tue..W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft.
Tue night..W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Wed..W winds 5 to 10 kt. Waves 1 ft.
Wed night..W winds 5 to 10 kt. Waves 1 ft or less.
Thu..SW winds 5 to 10 kt. Waves 1 ft.
Fri..NW winds 5 to 10 kt. Waves 1 ft.
ANZ500 135 Pm Edt Mon Oct 18 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build overhead through the middle portion of the week before a cold front approaches for late in the week. Small craft advisories may be necessary Thursday.


7 Day Forecast for Marine Location Near Cecilton, MD
   Hourly   EDIT   Help
location: 39.46, -75.87     debug


Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KPHI 181914 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 314 PM EDT Mon Oct 18 2021

SYNOPSIS. Our region will remain in west to northwest flow through Wednesday as high pressure remains centered across the Southeast with low pressure over the Canadian maritimes. A weak area of low pressure will track through the Great Lakes on Thursday, causing a cold front to move through the region Thursday night. A couple of upper level disturbances may bring some reinforcing colder air by next weekend.

NEAR TERM /THROUGH TUESDAY/. As of 2 PM, surface low pressure located over the Gulf of St. Lawrence with an associated upper level low located farther west over Quebec. Meanwhile broad high pressure was centered near Tennessee. The gradient between these features is continuing to drive gusty NW winds across the area with cooler temperatures compared to many recent days. Also, due to the colder air aloft combined with diurnal heating, significant strato cu has developed.

All in all, not too much change really expected through this afternoon though as a shortwave in the upper level flow dives S/E from upstate NY this could help trigger a few showers or light sprinkles mainly over portions of NE PA into NW NJ. Otherwise, conditions stay dry.

For tonight, the loss of diurnal heating combined with the upper low moving slightly farther away will result in clearing skies with diminishing winds. In fact this should really occur through the first part of the evening. Temperatures will be on the cool side with lows mostly in the low to mid 40s. However portions of the Lehigh Valley northward into the Poconos and NW NJ should see temps dip into the upper 30s. Winds, however, should stay up just enough due to the pressure gradient to keep temps from really bottoming out so no frost/freeze headlines appear to be needed.

For Tuesday, low pressure continues to pull away as high pressure settles into the SE CONUS. This will bring mainly sunny skies but it will still be a bit breezy due to the pressure gradient persisting. However it won't be quite as windy as today. Temperatures will also be a bit warmer with highs mostly in the middle to upper 60s . pretty close to average.

SHORT TERM /TUESDAY NIGHT THROUGH WEDNESDAY NIGHT/. Very quiet weather heading through the midweek period. Strong high pressure will remain centered to our south, slowly shifting east with time. Dry weather is expected. We get some warm advection on Wednesday as ridging over the Great Lakes region shifts east. Associated height rises and a shift to more westerly flow with plenty of sunshine and dry air will bump temperatures back up into the lower 70s. It will be a beautiful day. Otherwise, overnight lows will mostly favor the lower 50s. This is above average, mainly due to winds remaining a bit elevated at night as a decent pressure gradient remains in place between the high to the south and slow- moving low pressure over Atlantic Canada.

LONG TERM /THURSDAY THROUGH MONDAY/. Overview .

A relatively benign pattern continues through the weekend, though we will deal with the usual ups and downs of autumn. At upper levels, the main feature to watch will be a developing trough over the Great Lakes region. After a midweek warm-up, this trough is likely to bring a period of cooler weather by the end of this week and the weekend, but there remains uncertainty on how robust this trough will be. The overall appearance of the guidance for the late week and weekend is not as cold as it was, say, 24 hours ago, due to the trough being held back to the west a little more and keeping our flow more zonal. It does still look like we will trend cooler into the weekend, but how much of a cooldown remains in question with models still exhibiting considerable run-to-run variation. So some additional changes to the temperature forecast are very possible. Otherwise, our recent run of drier than normal weather looks to continue, as while there may be a couple of chances for showers, it does not look like we will have any widespread soaking rain events this period.

Dailies .

Thursday-Thursday night . As surface high pressure shifts offshore of the Southeast, fast-moving low pressure will track into the Great Lakes. This combination will allow steady southwest flow to develop, advecting additional warmer air into the region. Thursday looks like the warmest day of the week, with highs returning to the mid-70s. A cold front associated with the low pressure will start to approach by late afternoon or more likely the evening. Due to the unfavorable diurnal timing, meager dynamics, and very limited moisture, this front is likely to produce little if any rainfall. There will be just a slgt chc heading through the evening and overnight, with somewhat better odds across the northern zones.

Friday-Friday night . Most indications are for a dry day behind the cold frontal passage. A few degrees of cooling are likely behind the front, but the deeper troughing and associated colder air hangs back to the west, so it will still be fairly mild for the season. Highs in the upper 60s and lower 70s are currently forecast. Some guidance has also suggested a wave of low pressure riding along the offshore front may bring some rain at least to the southern portion of the area overnight. This does not look like a big deal and it may miss entirely, but have maintained some slgt chc to chc PoPs for the possibility, greatest to the south.

Saturday-Monday . As mentioned, the details of the forecast here are quite uncertain. Troughing will become more established over the Great Lakes, with a reservoir of colder air building up over the Lakes and southern Canada. That troughing should make at least some progress south and east with time, but models are wavering on how deep the trough will become. It is likely we will see a continued cooling trend. The latest consensus guidance suggests only a trend towards seasonable values, but there is still some potential for colder outcomes, which could result in frost/freeze concerns if they materialize. Confidence regarding precipitation chances is a little higher. While some spotty showers here or there cannot be ruled out due to a couple of shortwaves in the flow, especially on Saturday, there are no heavy precipitation events expected, and much of the time should be dry.

AVIATION /19Z MONDAY THROUGH SATURDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

This afternoon . VFR with scattered to broken cigs around 5 k ft. NW winds continue around 15-20 with gusts of 25 to 30 knots.

Tonight . VFR conditions expected with skies clearing and winds diminishing. W/NW winds diminishing to around 5-8 knots by the overnight.

Tuesday . VFR with WNW winds around 10 knots with gusts of 15 to 20 knots by late morning into the afternoon.

Outlook .

Tuesday night-Wednesday night . VFR. Westerly winds 5 to 10 kt, with some gusts near 20 kt Wednesday afternoon, then becoming light and variable Wednesday night. High confidence.

Thursday-Thursday night . VFR. Slight chance of a shower in the afternoon or evening mainly north and west of PHL. Southwest wind 5 to 10 kt. High confidence.

Friday-Friday night . Mainly VFR, with a chance for showers during the evening and overnight. Westerly wind 5 to 10 kt becoming light and variable at night. Moderate confidence.

Saturday-Saturday night . Mainly VFR, but showers are possible which may bring restrictions. Northwest wind 5 to 10 kt. Moderate confidence.

MARINE. We've extended the Small Craft Advisory of our ocean waters until 6 AM Tuesday. Generally expect winds gusting up to 30 knots however a few gusts to Gale force will be possible through early this evening. Winds over Delaware Bay should diminish below SCA levels around midnight.

For Tuesday, winds should be below SCA levels through the first half of the day before starting to increase again through the afternoon . potentially to marginal SCA levels by the evening.

Outlook .

Tuesday night . SCA conditions may continue mainly for the waters of northern and central New Jersey as westerly winds gust near 25 kt. Elsewhere, winds should be a little lighter. Seas 2 to 3 ft.

Wednesday-Wednesday night . Sub-SCA conditions expected. West wind 10 to 15 kt with gusts to 20 kt, becoming southwest overnight. Seas around 2 ft.

Thursday-Thursday night . A period of SCA conditions is possible for late Thursday and Thursday night as southwest winds gust near 25 kt and seas build to 4 to 5 ft.

Friday-Saturday . No marine headlines are currently anticipated.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . Small Craft Advisory until 6 AM EDT Tuesday for ANZ450>455. Small Craft Advisory until midnight EDT tonight for ANZ430-431.

Synopsis . O'Brien Near Term . Fitzsimmons Short Term . O'Brien Long Term . O'Brien Aviation . Fitzsimmons/O'Brien Marine . Fitzsimmons/O'Brien


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
CHCM2 - 8573927 - Chesapeake City, MD 6 mi55 min WNW 8G14 61°F 67°F1012.8 hPa
DELD1 - 8551762 - Delaware City, DE 17 mi55 min NW 12G17 60°F 67°F1012.3 hPa
RDYD1 - 8551910 - Reedy Point, DE 17 mi55 min 61°F 68°F1012 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 26 mi55 min N 9.9G14 62°F 65°F1013.4 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 28 mi55 min NW 25G29 61°F 67°F1013 hPa
DRSD1 - Delaware Reserve, DE 34 mi73 min WNW 7 64°F 1013 hPa40°F
MRCP1 - 8540433 - Marcus Hook, PA 34 mi55 min 62°F 67°F1011.7 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 39 mi55 min NW 12G14 64°F 1012.8 hPa
FSNM2 39 mi55 min WNW 14G19 63°F 1012.7 hPa
BLTM2 - 8574680 - Baltimore, MD 40 mi55 min N 7G14 64°F 70°F1012.6 hPa
CPVM2 42 mi55 min 65°F 44°F
44063 - Annapolis 46 mi43 min WNW 18G25 63°F 69°F1 ft1014.6 hPa (-2.1)
APAM2 - 8575512 - Annapolis, MD 46 mi55 min W 6G17 65°F 70°F1012.9 hPa
TPLM2 - Thomas Point, MD 49 mi43 min W 14G18 64°F 69°F1014.3 hPa (-1.8)

Wind History for Chesapeake City, MD
(wind in knots)    EDIT      (on/off)   Help
4
pm
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
Last
24hr
NW8
NW5
G8
W3
NW11
G15
NW9
W5
W5
W5
G8
W5
G9
W6
G11
W5
W4
W3
SW3
W4
W3
G7
W5
G8
W5
G9
W5
G12
W8
G11
NW11
G17
NW13
G20
NW14
G19
W12
G19
1 day
ago
NW5
G12
W5
G10
NW8
G11
W4
G7
NW6
G9
NW6
W6
G9
NW9
NW6
W4
G8
W5
G8
W5
G8
W6
W4
G8
W3
G6
W5
G8
W6
G13
W8
G11
NW10
G14
NW14
G20
NW15
G20
NW11
G16
NW11
G18
NW10
G14
2 days
ago
NW6
NW4
SW2
--
S1
S3
--
SE1
S1
--
W2
--
--
S2
S4
G7
S2
G6
S4
G10
S9
G12
S8
G12
S7
G15
SW9
G13
S8
G13
SW7
G15
SW8
G13

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Phillips Army Air Field / Aberdeen, MD16 mi45 minNW 10 G 207.00 miPartly Cloudy63°F40°F42%1012.8 hPa
Wilmington, New Castle County Airport, DE21 mi52 minNW 1410.00 miPartly Cloudy62°F39°F43%1012.6 hPa

Link to 5 minute data for KAPG

Wind History from APG (wind in knots)
4
pm
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
Last 24hrW4W3W9W11
G16
0NW30W3W4W4W3SW40W5W7W6SW6W7W8W12
G17
W12
G22
NW11
G20
W11
G19
NW10
G20
1 day agoNW5NW40NW4NW7NW5W8NW4W40W30W3W3SW3W4W4W7W5NW12
G17
W8
G15
W8
G17
NW5
G15
NW4
2 days agoSW6W4SW3SW3S3SW300000000S30S4S10S11
G15
S10S12
G18
S14
G22
SW14
G24
SW11

Tide / Current Tables for Courthouse Point, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Courthouse Point
Click for Map
Mon -- 02:35 AM EDT     0.76 feet Low Tide
Mon -- 05:05 AM EDT     Moonset
Mon -- 07:17 AM EDT     Sunrise
Mon -- 08:41 AM EDT     3.19 feet High Tide
Mon -- 03:15 PM EDT     0.76 feet Low Tide
Mon -- 05:48 PM EDT     Moonrise
Mon -- 06:19 PM EDT     Sunset
Mon -- 09:02 PM EDT     3.07 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1.5
1
am
1.1
2
am
0.8
3
am
0.8
4
am
1.1
5
am
1.6
6
am
2.2
7
am
2.8
8
am
3.1
9
am
3.2
10
am
3
11
am
2.5
12
pm
2
1
pm
1.5
2
pm
1
3
pm
0.8
4
pm
0.9
5
pm
1.2
6
pm
1.8
7
pm
2.5
8
pm
2.9
9
pm
3.1
10
pm
2.9
11
pm
2.6


Tide / Current Tables for Chesapeake and Delaware Canal, Maryland/Delaware Current
   EDIT      (on/off)   Help   One Week of Data
Chesapeake and Delaware Canal
Click for Map
Mon -- 03:20 AM EDT     0.02 knots Slack
Mon -- 05:05 AM EDT     Moonset
Mon -- 06:01 AM EDT     2.13 knots Max Flood
Mon -- 07:16 AM EDT     Sunrise
Mon -- 09:24 AM EDT     -0.08 knots Slack
Mon -- 12:15 PM EDT     -1.90 knots Max Ebb
Mon -- 03:51 PM EDT     0.03 knots Slack
Mon -- 05:48 PM EDT     Moonrise
Mon -- 06:19 PM EDT     Sunset
Mon -- 06:24 PM EDT     2.04 knots Max Flood
Mon -- 09:37 PM EDT     -0.05 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
-1.9
1
am
-1.8
2
am
-1.5
3
am
-0.8
4
am
1.2
5
am
1.9
6
am
2.1
7
am
2
8
am
1.6
9
am
0.9
10
am
-1.1
11
am
-1.7
12
pm
-1.9
1
pm
-1.8
2
pm
-1.6
3
pm
-1.3
4
pm
0.6
5
pm
1.6
6
pm
2
7
pm
2
8
pm
1.6
9
pm
1
10
pm
-0.8
11
pm
-1.6


Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS Local Image of    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




Please read website Cookie, Privacy, and Disclamers by clicking HERE.