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Marine Weather and Tides
Version 3.4 |
10/9/2019 Updated the Marine Zones. 9/4/2019 Fixed the weather maps due to NOAA moving them. 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 7:06AM | Sunset 4:40PM | Saturday December 7, 2019 6:45 PM EST (23:45 UTC) | Moonrise 2:18PM | Moonset 2:18AM | Illumination 84% |  |
ANZ431 Delaware Bay Waters South Of East Point Nj To Slaughter Beach De- 627 Pm Est Sat Dec 7 2019
Tonight..NE winds 5 to 10 kt. Waves 2 ft or less.
Sun..E winds 5 to 10 kt, becoming S in the afternoon. Waves 2 ft or less.
Sun night..S winds 5 to 10 kt. Waves 2 ft or less. Rain likely after midnight.
Mon..S winds 10 to 15 kt with gusts up to 20 kt. Waves 3 to 4 ft. Rain.
Mon night..SW winds 15 to 20 kt with gusts up to 25 kt. Waves 3 to 4 ft. Rain.
Tue..SW winds 15 to 20 kt. Waves 3 to 4 ft. Rain likely.
Tue night..NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft. Rain.
Wed..NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft. Rain, mainly in the morning.
Wed night..NW winds 15 to 20 kt with gusts up to 25 kt. Waves 3 to 4 ft. A chance of rain in the evening.
Thu..N winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Waves 3 to 4 ft.
Thu night..NE winds 10 to 15 kt. Waves around 3 ft.
Tonight..NE winds 5 to 10 kt. Waves 2 ft or less.
Sun..E winds 5 to 10 kt, becoming S in the afternoon. Waves 2 ft or less.
Sun night..S winds 5 to 10 kt. Waves 2 ft or less. Rain likely after midnight.
Mon..S winds 10 to 15 kt with gusts up to 20 kt. Waves 3 to 4 ft. Rain.
Mon night..SW winds 15 to 20 kt with gusts up to 25 kt. Waves 3 to 4 ft. Rain.
Tue..SW winds 15 to 20 kt. Waves 3 to 4 ft. Rain likely.
Tue night..NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft. Rain.
Wed..NW winds 10 to 15 kt with gusts up to 20 kt. Waves around 3 ft. Rain, mainly in the morning.
Wed night..NW winds 15 to 20 kt with gusts up to 25 kt. Waves 3 to 4 ft. A chance of rain in the evening.
Thu..N winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Waves 3 to 4 ft.
Thu night..NE winds 10 to 15 kt. Waves around 3 ft.
ANZ400 627 Pm Est Sat Dec 7 2019
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure will continue settling into the region tonight then moves offshore on Sunday. A warm front will lift north across the area on Monday ahead of the next low pressure system impacting the region through mid-week. A cold front will pass through late Tuesday then strong high pressure will build into the northeastern us through Thursday. Low pressure will return into next weekend.
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. High pressure will continue settling into the region tonight then moves offshore on Sunday. A warm front will lift north across the area on Monday ahead of the next low pressure system impacting the region through mid-week. A cold front will pass through late Tuesday then strong high pressure will build into the northeastern us through Thursday. Low pressure will return into next weekend.
7 Day Forecast for Marine Location Near Ellendale, DE
Hourly EDIT Helplocation: 38.86, -75.45 debug
Area Discussion for - Philadelphia/Mount Holly, PA
(on/off) Help NOTE: mouseover dotted underlined text for definitionFXUS61 KPHI 072334 AFDPHI
Area Forecast Discussion National Weather Service Mount Holly NJ 634 PM EST Sat Dec 7 2019
SYNOPSIS. High pressure will continue settling into the region tonight then moves offshore on Sunday. A warm front will lift north across the area on Monday ahead of the next low pressure system impacting the region through mid-week. A cold front will pass through late Tuesday then strong high pressure will build into the northeastern US through Thursday. Low pressure will return into next weekend.
NEAR TERM /UNTIL 6 AM SUNDAY MORNING/. 630 pm update: Temperatures are a challenge early this evening, as the urban heat island is keeping things warmer than forecast in the Philly metro while the rural/valley locations are tanking quickly. Suspect there will be a few hours in which temperatures are much more variable than the grids depict, but I did make an effort to simulate this variability a bit more.
Previous discussion .
High pressure will be directly across the area tonight. Clear skies and cold temperatures are expected. Lows will be close to 10 across the far north and in the teens and low 20s elsewhere. Reduced the temps across the north sharply from earlier with the snow on the ground and near ideal radiational conditions expected. Readings for metro Philadelphia will be in the mid 20s. Winds will be light and variable.
SHORT TERM /6 AM SUNDAY MORNING THROUGH 6 PM SUNDAY/. The center of the high will be offshore by morning but it will remain in control of the weather thru the day. Sunny or mostly sunny skies are expected through the day. After a very cold morning, temperatures will rebound back to near normal readings by afternoon. Highs will range from the upper 30s/low 40s N/W to near 50 S/E and metro Philadelphia. Winds will increase from the SE to S at 5 to 10 mph by early afternoon then switch around to SW late.
LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/. A busy start to the extended forecast period as a strong surface low moves out of the plains and into the Great Lakes region. The first affects of this system will be the arrival of a warm front Sunday night from south to north. An elongated vorticity impulse along the front will likely drive an area of moderate rain northward along the coast Sunday night. Several vorticity impulses will move from southeast to northeast through the region Monday through early Wednesday, which will translate into several periods of enhanced lift and heavier rounds of rainfall. Forecast soundings suggest precip could begin as a mix of rain and snow across the higher elevations of the Southern Poconos and across Sussex County, NJ- maybe even into the Lehigh Valley as well into early Monday morning. No accumulations are expected though, and rising temperatures into the 50s Monday will lead to quickened melting of any snow.
Heading into Tuesday, a cold front is expected to move across the area into the evening. Rainfall rates will likely increase as the precipitation shield expands across central PA along the front. PW values will likely exceed 1.00 inches and approach 1.25-1.50 inches Monday-Tuesday, so there could be period of moderate to heavy rainfall at times. With the first round of rainfall Monday-Monday night, we could get around 1.00-1.25 inches, and with the second round of rainfall, we could get 0.50-0.75 inches. There is a chance for some poor drainage/nuisance type flooding in areas of heavier rainfall during Monday-Tuesday. The longer duration of the rain should preclude any major flood concerns beyond this, however. Storm total rainfall generally ranges from 1-2 inches.
The front may stall to an extent as it moves offshore. The EC is more centralized in this camp, forecasting one additional impulse to ride along the front Wednesday morning, which would linger rainfall. The GFS still under-rides the CAA behind the front, suggesting a more substantial sneaker snow event may unfold early Wednesday morning. Am not currently buying this completely, contrary to many of our wishes. Climatologically, it is tough to keep the moisture around behind the fropa in these types of systems. This may very well follow a similar pattern to the storm system before Thanksgiving with a quick hour of snow showers with little to now accumulation. There is also the chance a few isolated lake-effect streamers may make their way into the Poconos in the afternoon, but chances of this are not very high attm. Highs will be much cooler in the 30s and 40s Wednesday compared to the 50s and 60s on Monday and Tuesday.
On Thursday, strong 1040-1045 mb high pressure will be moving from the Great Lakes region toward the northeastern CONUS with strong zonal flow aloft. Cold air advection will be underway early, then the north to northwesterly winds will decrease throughout the day. High temps will struggle to climb into the 30s area wide. Otherwise mainly clear and dry conditions are expected with surface dewpoints likely in the single digits. Temps will fall quickly Thursday evening, but lows will depend on the proximity of the center of the high across New England. If it's farther away, winds will stay more elevated and temps would not be as cold. Nevertheless, temps will be on the order of 10 degrees below normal.
On Friday, the cold and dry airmass will be recovering with cold advection shut off, but temps will likely top out a few degrees below normal. The GFS is aggressive in amplifying a southern stream wave ejecting from the southwestern CONUS arriving along the East Coast Friday, however it certainly appears to be an outlier compared to other deterministic medium range guidance; I have discounted its validity and left sub-mentionable PoPs for this period. Clouds will be on the increase throughout the day though with longwave upper troughing developing across the central US.
The next big rain-making system will impact the region starting early Saturday as the aforementioned upper troughing propagates closer to the East Coast. Depending on how persistent the cold surface air remains entrenched, could certainly a period of wintry mix at the precip onset early Saturday, but confidence on this is low. Medium range guidance differs quite a bit on the exact timing of the precipitation, but precipitation does appear likely.
AVIATION /00Z SUNDAY THROUGH THURSDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.
Tonight . VFR with light/variable winds. High confidence.
Sunday . VFR with light/variable winds in the morning becoming southerly up to 10 kt during the afternoon. High confidence.
Outlook .
Sunday night . Conditions may lower to MVFR later in the overnight as a warm front lifts through the region. South-southeasterly winds from 5 to 10 knots. Moderate confidence.
Monday-Tuesday . An extended period of MVFR and IFR conditions likely as periods of rain move across the area. Southeast winds early Monday become southwest once a warm front lifts across the area Monday. Winds from 5 to 10 knots shift to the northwest behind a cold front later Tuesday into Tuesday night with a few gusts to 15 knots possible as this occurs. Moderate confidence.
Tuesday night-Wednesday . Rain or snow remains possible with MVFR or IFR conditions possible. IFR conditions to improve to VFR Wednesday afternoon. West to northwest winds become gusty to 20-25 knots on Wednesday. Westerly winds should drop below 15 knots Wednesday night. Moderate confidence.
MARINE. High pressure across the waters this evening will move to the east overnight. A return flow will develop behind the high on Sunday. Sub-SCA conditions are expected. Fair weather. Seas 2 to 3 ft tonight and Sunday. On Delaware Bay waves 1 to 2 ft at most.
Outlook .
Small Craft Advisory conditions will likely be developing throughout the day Monday with seas building up to 9 feet Monday night and winds gusting up to 30 kts on ocean waters. These conditions will persist through Tuesday before gradually diminishing Tuesday night.
On Wednesday, offshore winds will be in the 20-25 kts range with seas 4-5 feet. Small Craft Advisory conditions probable.
PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . None.
Synopsis . Staarmann Near Term . CMS/O'Hara Short Term . O'Hara Long Term . Davis/Staarmann Aviation . CMS/Davis Marine . O'Hara/Staarmann
Weather Reporting Stations
EDIT (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 |
| LWSD1 - 8557380 - Lewes, DE | 18 mi | 46 min | NNW 12 G 14 | 41°F | 44°F | 1031 hPa (+1.7) | ||
| BRND1 - 8555889 - Brandywine Shoal Light, DE | 20 mi | 46 min | 1031.2 hPa (+1.5) | |||||
| CMAN4 - 8536110 - Cape May, NJ | 27 mi | 46 min | NNW 4.1 G 8 | 39°F | 45°F | 1030.5 hPa (+1.6) | ||
| SJSN4 - 8537121 - Ship John Shoal, NJ | 31 mi | 52 min | NW 6 G 8 | 40°F | 46°F | 1031 hPa | ||
| CA2 - 8571892 - Cambridge, MD | 38 mi | 52 min | N 4.1 G 6 | 40°F | 44°F | 1031 hPa | ||
| OCIM2 - 8570283 - Ocean City Inlet, MD | 41 mi | 52 min | NNE 7 G 9.9 | 40°F | 48°F | 1031.3 hPa | ||
| 44009 - DELAWARE BAY 26 NM Southeast of Cape May, NJ | 48 mi | 56 min | NNW 14 G 18 | 41°F | 54°F | 3 ft | 1027.5 hPa (+1.0) | |
| RDYD1 - 8551910 - Reedy Point, DE | 49 mi | 52 min | 38°F | 44°F | 1030.4 hPa | |||
| TCBM2 - 8573364 - Tolchester Beach, MD | 49 mi | 52 min | ESE 2.9 G 2.9 | 34°F | 45°F | 1031.1 hPa |
Wind History for Lewes, DE
(wind in knots) EDIT (on/off) Help| 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 | 6 PM | |
| Last 24hr | SW G13 | W G15 | W G13 | W G13 | NW | N | N G26 | N G23 | N | N G24 | N | N G25 | N G21 | N G20 | NE | NE G18 | N G12 | N G13 | N G14 | N G15 | N | N G18 | N G15 | N G14 |
| 1 day ago | W | W G10 | W | W | W G11 | W | W G9 | W | SW | SW | SW | SW | SW G8 | S G8 | S | S G14 | S G14 | SW G15 | SW G15 | SW G15 | SW G22 | SW G14 | SW G15 | SW G13 |
| 2 days ago | SW G8 | W G10 | W | W G7 | W | SW | W | W G12 | W | W | W G14 | W | W G16 | W | W | NW G26 | NW | W G26 | W | NW G24 | NW | NW G19 | NW G17 | W |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Georgetown - Delaware Coastal Airport, DE | 12 mi | 52 min | N 3 | 10.00 mi | Fair | 37°F | 21°F | 54% | 1030.8 hPa |
| Dover Air Force Base, DE | 19 mi | 50 min | N 0 | 10.00 mi | Fair | 35°F | 18°F | 49% | 1031.2 hPa |
Link to 5 minute data for KGED
Wind History from GED (wind in knots)
| 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 | 6 PM | |
| Last 24hr | SW | SW | W | SW | NW | N | N | N | N G17 | N | N | N | N | Calm | N | N G17 | NE G14 | NE | N | N | N | N | ||
| 1 day ago | SW | Calm | SW | Calm | Calm | Calm | Calm | Calm | Calm | SW | Calm | Calm | Calm | S | S | S | SW | SW | SW | SW G19 | SW G19 | SW | SW | |
| 2 days ago | SW | W | W | W | Calm | Calm | SW | W | W | W | W | NW | W G16 | W | W G20 | NW G18 | NW G18 | NW G21 | W G17 | G16 | W | W G14 | SW |
Tide / Current Tables for Mispillion River entrance, Delaware Bay, Delaware
EDIT Weekend mode (on/off) (on/off) Help One Week of DataMispillion River entrance
Click for Map
Sat -- 02:18 AM EST Moonset
Sat -- 05:11 AM EST 4.35 feet High Tide
Sat -- 07:06 AM EST Sunrise
Sat -- 11:48 AM EST 0.59 feet Low Tide
Sat -- 02:17 PM EST Moonrise
Sat -- 04:38 PM EST Sunset
Sat -- 05:24 PM EST 4.12 feet High Tide
Sat -- 11:58 PM EST 0.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 02:18 AM EST Moonset
Sat -- 05:11 AM EST 4.35 feet High Tide
Sat -- 07:06 AM EST Sunrise
Sat -- 11:48 AM EST 0.59 feet Low Tide
Sat -- 02:17 PM EST Moonrise
Sat -- 04:38 PM EST Sunset
Sat -- 05:24 PM EST 4.12 feet High Tide
Sat -- 11:58 PM EST 0.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 0.5 | 1.1 | 2.1 | 3.1 | 4 | 4.3 | 4.2 | 3.8 | 3 | 2.1 | 1.3 | 0.7 | 0.6 | 0.9 | 1.7 | 2.7 | 3.6 | 4.1 | 4.1 | 3.7 | 3 | 2 | 1.1 | 0.5 |
Tide / Current Tables for Delaware Bay Entrance, Delaware Current
EDIT (on/off) Help One Week of DataDelaware Bay Entrance
Click for Map
Sat -- 02:16 AM EST Moonset
Sat -- 02:52 AM EST 1.04 knots Max Flood
Sat -- 06:04 AM EST -0.00 knots Slack
Sat -- 07:04 AM EST Sunrise
Sat -- 09:28 AM EST -1.00 knots Max Ebb
Sat -- 12:23 PM EST 0.00 knots Slack
Sat -- 02:16 PM EST Moonrise
Sat -- 03:20 PM EST 0.98 knots Max Flood
Sat -- 04:38 PM EST Sunset
Sat -- 06:19 PM EST -0.00 knots Slack
Sat -- 09:40 PM EST -1.03 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sat -- 02:16 AM EST Moonset
Sat -- 02:52 AM EST 1.04 knots Max Flood
Sat -- 06:04 AM EST -0.00 knots Slack
Sat -- 07:04 AM EST Sunrise
Sat -- 09:28 AM EST -1.00 knots Max Ebb
Sat -- 12:23 PM EST 0.00 knots Slack
Sat -- 02:16 PM EST Moonrise
Sat -- 03:20 PM EST 0.98 knots Max Flood
Sat -- 04:38 PM EST Sunset
Sat -- 06:19 PM EST -0.00 knots Slack
Sat -- 09:40 PM EST -1.03 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
| 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 |
| 0.1 | 0.6 | 0.9 | 1 | 0.9 | 0.5 | 0 | -0.4 | -0.8 | -1 | -1 | -0.6 | -0.2 | 0.3 | 0.7 | 1 | 0.9 | 0.6 | 0.2 | -0.3 | -0.7 | -1 | -1 | -0.7 |
Weather Map
(on/off) Help Weather Map
GEOS 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 (18,4,5,8)
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Ground Weather Radar Station Dover AFB, DE
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