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Marine Weather and Tides Rehoboth Beach, DE Version 3.4

NOTICE 12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed. 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.

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Sunrise 7:15AM

Sunset 5:11PM

Sunday January 19, 2020 11:16 AM EST (16:16 UTC)

Moonrise 2:15AM

Moonset 12:55PM

Illumination 30%

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.

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7 Day Forecast for Marine Location Near Rehoboth Beach, DE

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Area Discussion for - Philadelphia/Mount Holly, PA

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FXUS61 KPHI 191417 AFDPHI

Area Forecast Discussion National Weather Service Mount Holly NJ 917 AM EST Sun Jan 19 2020

SYNOPSIS. A cold front will cross the region this morning followed by a second cold front tonight. High pressure will start to build into the Mid- Atlantic on Monday and crest over our area around Wednesday before finally moving to the south and east of the area late Friday. A low pressure system will approach from the west for next weekend.

NEAR TERM /UNTIL 6 PM THIS EVENING/. 915 am update: Added mention of snow showers for the rest of the day in the Poconos and far northwest New Jersey, as radar and surface obs indicate they have already begun in this region as favorable northwest flow has commenced with sufficient mixing in the post-frontal environment for parcel saturation and shallow convection. Not expecting significant impacts, but variations in visibility can be expected in their vicinity. Other main change was to slow the lowering of dew points today, as models are too aggressive in drying the low levels in the post-frontal environment. This is in part owing to weaker surface flow than expected, though this should increase with time later this morning into this afternoon.

Previous discussion .

Low pressure in northern New England and over the Gulf of Maine early this morning will strengthen as it moves across Nova Scotia today. The low was in the process of pulling a cold front through our region during the pre-dawn hours. The last of the showers associated with the front are forecast to be off the coasts of Delaware and southern New Jersey shortly after daybreak. We are anticipating a decrease in cloud cover over southeastern Pennsylvania, central and southern New Jersey, Delaware and northeastern Maryland this morning. Clouds may linger over the Pocono Region and far northern New Jersey through much of the day.

A west northwest wind is expected to increase to 15 to 20 mph with gusts around 25 to 30 mph. High temperatures should range from the upper 20s on the Pocono Plateau to the middle 40s in southern Delaware and in the adjacent counties of eastern Maryland. These values are close to normal for January 19.

SHORT TERM /6 PM THIS EVENING THROUGH 6 AM MONDAY/. A mid level short wave trough that was located over the western Great Lakes early this morning is forecast to progress southeastward. The axis of the trough is expected to pass over our region late tonight. We are anticipating an increase in cloud cover this evening ahead of the feature, mainly over eastern Pennsylvania and New Jersey. It could produce scattered snow showers at that time in parts of the Lehigh Valley, the Pocono Region and northern New Jersey. Little if any accumulation is forecast.

A northwest wind 10 to 15 mph is expected for tonight, with gusts of 20 to 25 mph. Low temperatures will favor the teens and lower 20s.

LONG TERM /MONDAY THROUGH SATURDAY/. The main feature of the extended will be a large area of high pressure that builds into the Mid-Atlantic through the course of the week. The airmass starts off on the cold side and below the climatological normals but will moderate each day and reach near normal through mid-week before continuing to warm to above normal temperatures by the end of the work week.

Monday will feature gusty winds as the pressure gradient remains fairly tight between the building high to our west and the departing low to the north and east. Winds look to be strongest in the morning as the gradient appears to weaken through the day as the low pusses quickly away through the Canadian maritimes. Soundings show some gusts around 25 to 35 mph possible early with diminishing gusts as we head through the late morning and into the afternoon. With highs only expected to reach into the 20s to mid 30s across the region, it will be a cold one (colder with the wind chills early in the day) even though the sun should be shining brightly across the forecast area.

Monday night, the winds diminish quite a bit and should become relatively light across the region. With little to no clouds in sight, we will radiate quite efficiently and temps should drop off. Low temperatures are expected to drop off into the teens across much of the region will some temps closer to the lower 20s along the coastal regions.

As stated above, the air mass will modify and we should see a warming trend across the region as the week progresses. Conditions will be fairly similar with plenty of sunshine across the region from Tuesday through Friday. Highs on Tuesday will be fairly similar to Monday, although it will feel slightly warmer as winds remain much more lax across the region with the high starting to push towards the area. By the time we get to Wednesday, temperatures should be warming and highs will start to rise into the upper 30s to lower 40s (much closer to the normals for late January) and then by Thursday they warm even further and reach into the 40s.

The one difference will be that clouds will gradually increase as we head towards the end of the week as the next system will start to develop and move towards the region. However, that will not stop the sun from shining brightly and helping us to warm significantly. Friday will be the warmest day of the week with highs possibly nearing 50 as far north as the I-95 corridor and on average around 10 degrees warmer than normal through the forecast area.

Model guidance presently is showing a low pressure system developing out towards the plains/western gulf and then tracking into the midwestern states Friday. The current model tracks for this system would keep us in the warm sector (as has been the case for much of this winter already) and would keep most of the precipitation that falls as liquid and generally plain rain, although some mixing is more likely to occur at times in the higher elevations. With plenty of time to let the models get a better handle on this system, will keep a simple rain/snow mention in the relevant areas in the forecast.

AVIATION /14Z SUNDAY THROUGH THURSDAY/. The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG, KILG, KMIV, KACY and surrounding areas.

Today . Lingering IFR/MVFR ceilings improving to VFR by 13Z. VFR from about 13Z onward with scattered to broken cloud cover. West northwest wind 12 to 16 knots gusting to 25 to 30 knots. High confidence.

Tonight . VFR. Scattered to broken cloud cover. There is a chance of snow showers around KABE between about 00Z and 04Z which could lower conditions briefly to MVFR there. Northwest wind 10 to 15 knots gusting around 20 knots. Generally high confidence, with medium confidence regarding the snow shower potential.

Outlook .

Monday . VFR conditions expected. Northwest winds around 10 to 15 knots with gusts up to 30 knots possible, mainly before 18Z. Gusts around 20 knots possible through 00Z. High confidence.

Monday night through Wednesday . VFR conditions expected. Northwest winds around 10 knots. High confidence.

Wednesday night and Thursday . VFR conditions expected. Winds variable but generally less than 10 knots. High confidence.

MARINE. Strong low pressure was departing well to our northeast early this morning, and high pressure was beginning to build toward the coastal waters of New Jersey and Delaware from the northwest. The pattern will maintain a brisk west northwest wind on our waters for today and tonight. Frequent wind gusts of 25 to 30 knots are anticipated. As a result, the Small Craft Advisory remains in effect.

Outlook .

Monday . A Small Craft Advisory is in effect for Monday. Seas on the ocean will start off around 3 to 5 feet and then should diminish through the day. Northwest winds will gust around 25 to 30 knots through the morning and into the afternoon. Gusts are expected to drop below 25 knots by early evening as the gradient really starts to weaken.

Monday night . Northwest winds may gusts near 25 knots during the the early part of the evening but should continue to diminish through the night. A Small Craft Advisory may be needed but confidence was too low to extend farther out at this time. Seas will be around 2 to 4 feet.

Tuesday through Thursday . Sub-Small Craft Advisory conditions expected. Seas are expected to be around 1 to 3 feet. Winds will generally be out of the northwest around 5 to 15 knots through the period.

PHI WATCHES/WARNINGS/ADVISORIES. PA . None. NJ . None. DE . None. MD . None. MARINE . Small Craft Advisory until 6 PM EST Monday for ANZ430-431- 450>455.

Synopsis . Meola Near Term . CMS/Iovino Short Term . Iovino Long Term . Meola Aviation . Iovino/Meola Marine . Iovino/Meola

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
LWSD1 - 8557380 - Lewes, DE	5 mi	46 min		45°F	43°F		1010.1 hPa
CMAN4 - 8536110 - Cape May, NJ	18 mi	46 min		44°F	43°F		1009.5 hPa
BRND1 - 8555889 - Brandywine Shoal Light, DE	19 mi	46 min					1010.3 hPa
44009 - DELAWARE BAY 26 NM Southeast of Cape May, NJ	27 mi	26 min	NW 18 G 21	46°F	49°F	6 ft	1006.7 hPa (+0.8)
OCIM2 - 8570283 - Ocean City Inlet, MD	27 mi	46 min			44°F		1010.7 hPa
SJSN4 - 8537121 - Ship John Shoal, NJ	43 mi	46 min		43°F	43°F		1010 hPa

Wind History for Lewes, DE

(wind in knots)    EDIT      (on/off)   Help

12 PM

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7 PM

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9 PM

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12 AM

1 AM

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Last 24hr

S5 G9

S6 G9

S6 G9

S5 G11

S5 G8

SW2

S4 G7

SW5 G8

SW8 G11

W10 G13

SW12 G18

SW10 G20

SW13 G21

SW16 G26

SW12 G20

SW13 G21

SW12 G18

W12 G15

NW7

NW14 G18

W10 G13

NW11

NW19 G25

NW19 G25

1 day ago

N23 G29

N21

N18

N17 G23

NW7 G22

N17 G21

N15 G19

N18

NW17 G21

NW14 G17

NW14 G19

N13 G16

N14

NE12 G15

N8 G14

NE6 G9

NE5

SE4

E3

SE2

SE4

SW2

S4

SW5 G9

2 days ago

NW24 G29

NW20 G26

NW29 G35

NW19 G28

NW27 G35

NW24 G31

NW20

NW28 G34

NW28 G36

NW24 G29

NW27

NW29

NW26

NW28 G36

NW23 G32

NW26 G34

NW26 G33

NW32 G39

NW27 G34

NW24 G31

NW27 G34

N28 G34

N26

N23 G29

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Georgetown - Delaware Coastal Airport, DE	15 mi	22 min	WNW 12 G 22	10.00 mi	Partly Cloudy	47°F	30°F	52%	1010.6 hPa
Wildwood, Cape May County Airport, NJ	22 mi	20 min	WNW 11 G 15	10.00 mi	Partly Cloudy	45°F	34°F	66%	1010.4 hPa

Link to 5 minute data for KGED

Wind History from GED (wind in knots)

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Last 24hr

S7

S9

S7

S6

S4

Calm

S6

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SW8

W7 G15

SW14 G24

SW14 G21

SW16

SW19 G25

SW16 G27

SW12

W13 G19

W7

W3

NW5

W3

3

NW8

NW12 G22

1 day ago

N9 G18

N14 G19

N9 G19

N9

N9

N4

N3

NW3

NW4

Calm

NE3

Calm

Calm

N4

N3

Calm

Calm

Calm

NE3

Calm

SE4

S4

S6

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2 days ago

NW10 G22

NW19 G28

NW10 G23

NW16 G32

NW16 G27

NW13 G20

NW9 G16

NW8 G20

NW12 G26

NW9 G21

NW12 G21

NW9 G17

NW6

NW8 G19

5

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NW7

N5

N10 G16

N7 G16

N6

N10 G21

NW12 G19

N11 G19

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Tide / Current Tables for Rehoboth Beach, Delaware

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Tide / Current Tables for Delaware Bay Entrance, Delaware Current

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Weather Map

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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

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Wind Forecast for Philadelphia/Mount Holly, PA (11,2,3,4)

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Ground Weather Radar Station Dover AFB, DE

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