Thursday, September23, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Church Hill, 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 6:52AMSunset 7:01PM Thursday September 23, 2021 1:27 PM EDT (17:27 UTC) Moonrise 7:33PMMoonset 8:19AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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
ANZ539 Chester River To Queenstown Md- 1248 Pm Edt Thu Sep 23 2021
.small craft advisory in effect from 6 pm this evening to midnight edt tonight...
This afternoon..NW winds 5 to 10 kt. Waves 1 to 2 ft. Showers and tstms.
Tonight..NW winds 5 kt...increasing to 10 to 15 kt with gusts to 20 kt in the late evening and overnight. Waves 2 ft.
Fri..NW winds 5 to 10 kt. Waves 1 to 2 ft.
Fri night..N winds 5 kt. Waves less than 1 ft.
Sat..NW winds 5 kt. Waves less than 1 ft.
Sat night..SW winds 5 to 10 kt. Waves 1 ft.
Sun..W winds 5 to 10 kt. Waves 1 to 2 ft.
Mon..W winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1248 Pm Edt Thu Sep 23 2021
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A strong cold front will continue to push through the region this morning as high pressure gradually builds back in from the west. High pressure will remain in control for the weekend. However a weak cold front may cross the region Saturday night where small craft advisories may be required for portions of the waters.


7 Day Forecast for Marine Location Near Church Hill, MD
   Hourly   EDIT   Help
location: 39.15, -76     debug


Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS61 KPHI 231444 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 1044 AM EDT Thu Sep 23 2021

SYNOPSIS. A cold front will move into the region today and pushing to the east through tonight. High pressure will build into the Mid- Atlantic from the southwest for Friday and Saturday. A weak cold front will cross the region later Saturday followed by a return to high pressure for Sunday through Tuesday. Yet another cold front will approach the region later Tuesday.

NEAR TERM /THROUGH TONIGHT/. Mid-Morning Update .

Very little change to the forecast this morning. Made some adjustments to hourly PoPs based on radar trends, but overall thinking remains the same. While the front approached a little faster than expected overnight, it is now slowing down as it moves into the area, and it will take most of the day for showers and thunderstorms to move through. Eastern areas will even continue to see breaks of sun for another couple hours before rain gradually overspreads. We have already seen some impressive rainfall amounts over eastern Maryland as cells train from south to north. As the front crawls eastward, the risk for training cells and heavy rain will gradually shift east as well. The potential remains for at least localized flash flooding. Am not overly concerned about the severe threat due to limited instability, but with a strong LLJ there remains a threat for a convectively enhanced damaging wind gust, and given strong low level SRH (shown nicely in 12z RAOBs from OKX and WAL), still cannot entirely rule out an isolated tornado. Previous discussion follows .

A few light showers have worked their way across the Delaware Valley this morning, but a stronger line of showers and possibly some embedded thunder is forming across the western Chesapeake Bay and is expected to push eastward to the Eastern Shore later this morning. Further to our west, a deeply occluded upper- level low is centered over the Ohio Valley, with a rigorous dry slot working northward between it and the associated cold/occluded front to its east.

One concern today with this front continues to be the flash flooding threat with the area of greatest concern being the Lehigh Valley and Poconos where orographic enhancement is likely to enhance heavy rainfall potential. A swath of PWAT values exceeding two inches just to our west continues to move towards our region this morning. A big factor at play will be exactly how quickly the front moves east with a rather abrupt end to the rainfall as the dry slot moves into the region from west to east. Latest guidance has suggested this may push eastward a little more quickly, which has resulted in a slight decrease in rainfall totals, though the risk for localized amounts exceeding three inches still remains across eastern Pennsylvania. A Flash Flood Watch remains in effect for much of the region along and west of the I-95 corridor.

Another item of concern is the severe threat. The impressive synoptic-level winds with the system will likely be mixed down to the surface with some of the stronger showers and thunderstorms with 40 to 50-knot winds only a few thousand feet above the surface with a very rigorous low level jet shooting from south to north ahead of this front. With the more southeasterly flow at the surface and southerly to south- southwesterly winds in this jet, the threat for isolated tornadoes continues to remain. Any updrafts that can tap into this pre-existing low-level wind shear will easily be able to rotate. 0-3km SRH values from 200 to 300 m2/s2 largely support this threat. The more surface heating and sunshine we see early today, the greater the threat is likely to be. With forecast ML CAPEs around 1000 J/kg across the I-95 corridor, this should be enough to get a few stronger cells going.

Otherwise, highs today will be seasonably warm in the upper 70s to near 80 and lows dropping into the upper 50s tonight behind the front. Warmer values near the coast with the front not clearing the region as fast. Highs tomorrow will be a little cooler in the low 70s.

SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/. The cold front pulls off to the east on Friday, allowing for dry air to quickly push into our forecast area. With clearing skies and plenty of sunshine, it will feel quite fall-like on Friday as highs only rise into the 60s to lower 70s across the region. With dew points in the 50s, it will feel much more comfortable than it has in recent days.

With the skies remaining clear into Friday night and winds dropping off, we should radiate fairly well. Overnight lows will drop into the mid 40s to lower 50s across the area.

Saturday will feature high pressure building cresting overhead. A few clouds around the region during the day but otherwise mostly sunny skies are expected. Highs will be similar to Friday, through with some slight warming aloft in the southwest flow it should be a couple of degrees warmer. A weak cold front will approach from the west as a deep upper trough pushes towards the area, moving through later Saturday night. While there will be quite a bit of energy available aloft, the front itself is moisture starved and we are not expecting any showers to develop as it moves through and makes its way offshore Saturday night.

LONG TERM /SUNDAY THROUGH WEDNESDAY/. Surface high pressure will build across the region for Sunday through Tuesday, keeping the region dry. Aloft, a trough will dig down and cross the region Sunday into Monday. While there is no moisture associated with this trough passage, there should be some cooler temperatures which will keep the highs on Sunday slightly below normal and in the 60s to lower 70s through much of the region. As we go through Monday and Tuesday, the air mass will moderate and warm a few degrees each day.

A weak cold front will approach the region on Tuesday, passing through Tuesday night. Some rain showers may accompany the front and we can't rule out a few rumbles of thunder.

Ridging aloft along with surface high pressure will once again move over the region for midweek with warmer and drier conditions expected.

AVIATION /15Z THURSDAY THROUGH MONDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Today . A mix of MVFR with some remaining pockets of VFR should continue through the morning as a frontal system and associated rainfall slowly approaches. All terminals should drop to MVFR by this afternoon, with widespread MVFR and localized IFR through this evening with rounds of showers and thunderstorms, heavy at times. Timing of the cold front has sped up slightly, thus southeasterly winds from 15 to 20 knots through 20Z with gusts up to 30 knots will begin to quickly shift westerly as the front passes through the region. The front looks to pass slowly across the region from 20Z at RDG to 22Z at the Philly terminals to 06Z at ACY. Moderate to high confidence in overall trend, lower confidence in exact timing of wind shift and categorical shifts.

Tonight . A gradual improvement from lingering MVFR to VFR through the early morning. West-southwesterly winds shifting to west- northwest from 5 to 10 knots. Moderate confidence.

Friday . VFR with westerly winds from 5 to 10 knots. A few showers may linger along the coast in the morning hours bringing probable MVFR restrictions through 16Z. High confidence.

Outlook .

Friday night through Sunday . Mainly VFR expected. West to northwest winds around 10 knots, increasing to 10 to 15 knots on Sunday. High confidence.

Monday . Mainly VFR expected. West to southwest wind around 10 to 15 knots. High confidence.

MARINE. Today . Southeasterly winds from 15 to 20 knots with gusts to 30 knots. Seas building to 4 to 7 feet with a few 8-foot breaking waves possible. An SCA remains in effect for the Atlantic coastal waters through the day. A Gale Warning remains in effect for the Delaware Bay through 6 pm as the funneling of southeasterly flow up the Bay allows for some gusts near to above 35 kt, the likes of which have already been observed.

Tonight . Winds turning westerly and dropping to 10 to 15 knots but seas will linger from 4 to 6 feet through the night, thus the SCA remains in effect through the overnight for the Atlantic coastal waters.

Friday . Northwesterly winds from 5 to 10 knots with gusts to 15 knots. Seas remaining elevated through 4 pm from 3 to 5 feet.

Outlook .

Friday night through Monday . No marine headlines are anticipated. Westerly winds around 10 to 15 knots, with some gusts around 20 knots on Sunday. Seas generally around 2 to 4 feet.

Rip currents .

We have forecast a HIGH risk of dangerous rip currents for today for both NJ and DE beaches, as winds become a little stronger with an increasing swell.

A HIGH risk will continue for the NJ beaches on Friday with a MODERATE risk expected at the DE beaches.

A Rip Current Statement is in effect for the DE beaches through tonight and for the NJ beaches through Friday evening.

TIDES/COASTAL FLOODING. Strong southerly flow in advance of the system moving through the region resulted in elevated water levels on the eastern shore of Chesapeake Bay, where some minor tidal flooding has occurred. A Coastal Flood Advisory remains in effect for Kent County until noon.

Water levels on the far upper Delaware Bay and on the tidal Delaware River are also elevated due to the strong southeast wind. We have issued a Coastal Flood Advisory for those areas for this afternoon.

PHI WATCHES/WARNINGS/ADVISORIES. PA . Flash Flood Watch through late tonight for PAZ070-071-102-104- 106. Coastal Flood Advisory from 2 PM this afternoon to 7 PM EDT this evening for PAZ070-071-106. Flash Flood Watch through late tonight for PAZ054-055-060>062- 101-103-105. NJ . Flash Flood Watch through late tonight for NJZ001-007>010-012- 015. High Rip Current Risk through Friday evening for NJZ014- 024>026. Coastal Flood Advisory until 3 PM EDT this afternoon for NJZ016. Coastal Flood Advisory from 2 PM this afternoon to 7 PM EDT this evening for NJZ017>019. DE . High Rip Current Risk until 8 PM EDT this evening for DEZ004. Flash Flood Watch through late tonight for DEZ001. Coastal Flood Advisory until 3 PM EDT this afternoon for DEZ001. MD . Coastal Flood Advisory until noon EDT today for MDZ012. MARINE . Small Craft Advisory until 4 PM EDT Friday for ANZ450>455. Gale Warning until 6 PM EDT this evening for ANZ430-431.



Synopsis . Meola Near Term . Davis/O'Brien Short Term . Meola Long Term . Meola Aviation . Davis/Meola/O'Brien Marine . Davis/Meola Tides/Coastal Flooding . WFO PHI


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
TCBM2 - 8573364 - Tolchester Beach, MD 14 mi58 min NNW 9.9 G 12 65°F 76°F1011.3 hPa
CPVM2 23 mi58 min 64°F 63°F
44063 - Annapolis 27 mi52 min 63°F 76°F991.1 hPa
CHCM2 - 8573927 - Chesapeake City, MD 28 mi58 min WSW 2.9 G 4.1 66°F 76°F1010.5 hPa
APAM2 - 8575512 - Annapolis, MD 28 mi58 min W 2.9 G 5.1 66°F 78°F1011.1 hPa
FSNM2 28 mi58 min WNW 8.9 G 12 66°F 1010.7 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 28 mi58 min NW 7 G 8.9 66°F 1010.8 hPa
TPLM2 - Thomas Point, MD 29 mi88 min WNW 8 G 9.9 64°F 76°F1012 hPa (+2.2)
DRSD1 - Delaware Reserve, DE 30 mi58 min WSW 4.1 71°F 1010 hPa70°F
BLTM2 - 8574680 - Baltimore, MD 32 mi58 min N 8 G 12 67°F 77°F1010.3 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ 35 mi58 min SSE 30 G 41 74°F 75°F1010.5 hPa
RDYD1 - 8551910 - Reedy Point, DE 36 mi58 min 71°F 76°F1009.3 hPa
DELD1 - 8551762 - Delaware City, DE 37 mi58 min SSW 2.9 G 4.1 70°F 75°F1009.7 hPa
CA2 - 8571892 - Cambridge, MD 40 mi58 min WNW 11 G 15 66°F 76°F1011.4 hPa
BSLM2 - Chesapeake Bay, MD 45 mi58 min N 1.9 64°F 1011 hPa60°F
44062 - Gooses Reef, MD 47 mi52 min NW 12 G 16 64°F 77°F1 ft987.8 hPa
BRND1 - 8555889 - Brandywine Shoal Light, DE 48 mi58 min S 28 G 34 1010.2 hPa

Wind History for Tolchester Beach, MD
(wind in knots)    EDIT      (on/off)   Help
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
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last
24hr
SE5
G8
S5
G9
SE8
G15
SE7
G15
SE11
G16
SE10
G16
SE11
G16
SE8
G15
SE7
G12
SE7
G18
SE7
G13
SE9
G13
SE9
G15
SE8
G18
SE8
G15
SE7
G16
SE10
G16
SE8
G16
SE10
G13
S9
G14
NW15
NW12
G17
NW11
G14
NW5
G8
1 day
ago
E7
G12
E8
G12
E6
G10
E7
G11
E4
G7
E3
G6
SE3
E3
E4
G7
E3
SE3
G6
SE5
G8
SE2
E5
G8
E3
SE4
G7
SE6
SE3
G7
SE5
G9
SE6
G14
S7
G10
SE8
G14
SE7
G16
SE6
G11
2 days
ago
E4
G8
E5
G12
E7
G12
E6
G10
E7
G11
E4
G7
E2
G7
E2
E2
E2
E3
E4
E4
G7
E5
E5
E5
G8
E4
NE1
E4
E3
G7
E5
G9
SE5
G8
SE4
G9
SE4
G8

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, MD24 mi93 minNW 73.00 miShowers Rain Fog/Mist63°F61°F94%1009.4 hPa
Easton / Newman Field, MD24 mi38 minWNW 74.00 miLight Rain64°F64°F100%1013.2 hPa

Link to 5 minute data for KW29

Wind History from W29 (wind in knots)
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
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last 24hr--S7SE6S5S8S9S10S11S10
G16
S9S9
G19
SE11S13
G16
S12
G23
S7S6SE5SE4SE6SE6SE9SE10S6Calm
1 day agoSW10
G18
S9
G18
SW11
G19
SW13
G20
W11
G18
W10
G20
W13
G21
NW16
G25
NW9
G23
NW16
G22
NW11
G20
NW11N10N8N12
G17
N12N9N9N10N3CalmCalmCalmCalm
2 days agoS3S6S5S7SE6CalmSE3NW3CalmCalmE3CalmSE4SE5S7S9S8S9S7W6S6S10
G17
S12S13
G17

Tide / Current Tables for Chestertown, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Chestertown
Click for Map
Thu -- 03:49 AM EDT     0.97 feet Low Tide
Thu -- 06:53 AM EDT     Sunrise
Thu -- 09:19 AM EDT     Moonset
Thu -- 09:34 AM EDT     2.55 feet High Tide
Thu -- 03:39 PM EDT     0.68 feet Low Tide
Thu -- 06:59 PM EDT     Sunset
Thu -- 08:32 PM EDT     Moonrise
Thu -- 10:12 PM EDT     2.88 feet High 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
2.11.71.3111.11.41.92.32.52.52.31.91.410.70.70.91.31.82.32.72.92.8

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
   EDIT      (on/off)   Help   One Week of Data
Baltimore Harbor Approach
Click for Map
Thu -- 01:32 AM EDT     -0.89 knots Max Ebb
Thu -- 04:47 AM EDT     0.00 knots Slack
Thu -- 06:54 AM EDT     Sunrise
Thu -- 07:35 AM EDT     0.70 knots Max Flood
Thu -- 09:21 AM EDT     Moonset
Thu -- 10:28 AM EDT     -0.00 knots Slack
Thu -- 01:32 PM EDT     -0.78 knots Max Ebb
Thu -- 04:28 PM EDT     0.00 knots Slack
Thu -- 07:00 PM EDT     Sunset
Thu -- 07:50 PM EDT     0.98 knots Max Flood
Thu -- 08:34 PM EDT     Moonrise
Thu -- 11:10 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
-0.6-0.9-0.9-0.7-0.30.10.40.70.70.50.2-0.2-0.5-0.7-0.8-0.6-0.20.20.60.910.80.50.1

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.