Saturday, July21, 2018 L-36.com


Marine Weather and Tides
Wilmington, DE

Version 3.4
What's New / NOTES
7/21/2018 Trying to make page Mobile Friendly

Sunrise 5:50AMSunset 8:26PM Saturday July 21, 2018 11:16 PM EDT (03:16 UTC) Moonrise 2:15PMMoonset 12:24AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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
ANZ430 Delaware Bay Waters North Of East Point Nj To Slaughter Beach De- 940 Pm Edt Sat Jul 21 2018
.gale warning in effect until 1 am edt Sunday...
Rest of tonight..E winds 20 to 25 kt, becoming S 15 to 20 kt. Gusts up to 35 kt. Waves 3 to 4 ft. Periods of rain late this evening, then rain likely. A slight chance of rain late. Vsby 1 to 3 nm late this evening and early morning.
Sun..SE winds 10 to 15 kt. Gusts up to 20 kt early in the morning, then 20 kt in the afternoon. Waves around 3 ft early in the morning, then 2 ft or less, then around 3 ft early in the afternoon. A chance of showers and tstms in the afternoon.
Sun night..SE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less. Showers with a chance of tstms.
Mon..SE winds around 15 kt with gusts up to 20 kt. Waves 2 ft or less, then around 3 ft in the late morning and afternoon. A chance of tstms. Showers.
Mon night..SE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves around 3 ft in the evening, then 2 ft or less. A chance of tstms. Showers likely, mainly in the evening.
Tue..SE winds 10 to 15 kt with gusts up to 20 kt. Waves 2 ft or less. A chance of showers and tstms.
Tue night..SE winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 2 ft or less. A chance of showers and tstms.
Wed..S winds 10 to 15 kt. Waves 2 ft or less. A chance of showers and tstms.
Wed night..S winds 10 to 15 kt. Waves 2 ft or less. Showers likely with a chance of tstms.
Thu..S winds around 10 kt. Waves 2 ft or less. Showers likely with a chance of tstms.
Thu night..SW winds 5 to 10 kt. Waves 2 ft or less. A chance of tstms. Showers likely, mainly in the evening. Winds and waves higher in and near tstms.
ANZ400 940 Pm Edt Sat Jul 21 2018
Synopsis for the coastal waters from sandy hook nj to fenwick island de and for delaware bay.. Low pressure will move northward up the chesapeake bay this evening, then through pennsylvania and western new york late tonight into Sunday. Meanwhile, another area of low pressure over the midwest will drift south into the southeast u.s. Through the middle of next week. A cold front may eventually move into the region late in the week, then stall near the east coast heading into next weekend.

7 Day Forecast for Marine Location Near Wilmington, DE
   Hourly   EDIT   Help
location: 39.73, -75.56     debug


Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kphi 220155
afdphi
area forecast discussion
national weather service mount holly nj
955 pm edt Sat jul 21 2018

Synopsis
Low pressure will move northward up the chesapeake bay this evening,
then through pennsylvania and western new york late tonight into
Sunday. Meanwhile, another area of low pressure over the midwest
will drift south into the southeast u.S. Through the middle of next
week. A cold front may eventually move into the region late in the
week, then stall near the east coast heading into next weekend.

Near term until 6 am Sunday morning
Surface low pressure, as of 9 pm, was centered over the lower
delmarva. This low is forecast to slide north-northwestward
through the night. An easterly low-level jet near 50 knots is
working northward, and a mesoanalysis shows some instability
creeping onto the coastal areas from off the ocean. It is here
where dew points have risen to around 70 degrees. While a few
isolated thunderstorms cannot be ruled out with the ongoing
bands of heavier rain sliding northward, looks like the main
instability is held just offshore. Still kept a slight chance of
thunder for the far eastern areas for awhile tonight. Some
lightning has been observed just west of chesapeake bay within
an area of strong frontogenetic forcing to the northwest of the
surface low. This heavier rain looks to slide just to our west
into the overnight hours.

The southern edge of the rain is working into southern delaware
and it looks like the threat for flash flooding has diminished across
the southern areas. Since the heavier showers offshore look to
rotated north-northwestward into the overnight and probably
across the philadelphia metro, maintained the flash flood watch
for now. The watch however was cancelled for marylands eastern
shore, delaware and far southern new jersey.

The easterly winds have increased especially along the coast
with some gusts to 40 mph thus far. Some additional increase
should take place over the next several hours as the surface low
works north-northwest and the low-level jet strengthens some
northward. As a result, no changes to the earlier issued wind
advisory.

Did speed up the decreasing pops across the southern areas
especially as a dry slot works in over the next few hours. The
hourly temperature, dew point, wind and wind gust grids were
adjusted based on the latest observations then these were
blended into mostly continuity.

Otherwise, as the low tracks across pennsylvania later tonight,
drier air begins to move in on the backside, and precipitation
will begin to come to an end front south to north. Areas across
northeast pennsylvania and northern new jersey may hold on to
rain until daybreak Sunday.

Short term 6 am Sunday morning through 6 pm Sunday
As the low pressure system continues to lift to our north and
northwest toward the great lakes in the morning hours, most
precipitation will come to an end. However, our area will still be
under the influence of south-southwest flow aloft, along with
increasing southerly flow at the surface. This will allow for
temperatures to warm during the day, especially if any sunshine
breaks out. This will lead to increasing instability during the day,
and with any short wave vorticity impulses moving across the area,
scattered showers and isolated thunderstorms will be possible
through the day Sunday, especially during the afternoon hours. Since
storms are expected to be mostly scattered, and there is not overly
strong instability or shear expected, we are not expecting widespread
severe weather. Nor are we expecting widespread flooding as pw
values will be below 2 inches and any storms should be fairly
progressive.

Long term Sunday night through Saturday
This unsettled weather pattern is expected to continue into the
upcoming week and at least the first part of next weekend. This
unsettled pattern can be attributed to a high amplitude pattern that
consists of a deep upper trough over the eastern CONUS and
downstream ridge blocking over the western atlantic basin.

Tropospheric-deep southerly flow in between these two systems will
continue to draw tropical moisture up the eastern seaboard,
resulting in very muggy conditions (dewpoints in the 70s) and [at
least the threat of] multiple rounds of showers and storms each day.

Unlike with today's event, there doesn't appear to be any organized
synoptic disturbance(s) in particular to produce widespread rain
and or result in a washout on most days next week except possibly
sometime midweek when the cutoff low to our west becomes an open
wave and finally lifts northeastward through the region. Models
continue to struggle figuring out how quickly the shortwave trough
ejects downstream toward the mid atlantic but the spread has
narrowed between sometime Wednesday and Thursday. This timing
uncertainty prevented us from going much higher with pops in any one
period.

The threat of heavy rainfall and flooding this week will increase as
soils become increasingly wet and stages rise in area basins
following each successive round of rainfall. Potential hydro impacts
will be added to the hwo. With convective coverage much more
disorganized than with today's event, heavy rainfall should be much
more localized and thus responses from runoff on the larger river
basins next week is highly uncertain.

Aviation 02z Sunday through Thursday
The following discussion is for kphl, kpne, kttn, kabe, krdg,
kilg, kmiv, kacy and surrounding areas.

Tonight... MVFR ifr conditions overall, although locallyVFR
conditions will occur at times this evening. The rain will end
from south to north mostly in the 05z-08z time frame. East-
northeast winds 10-20 knots with gusts up to 30 knots (highest
gusts closer to the coast), then becoming southeast and
diminishing overnight. An east to southeast low-level jet at
2000 feet of 40-50 knots will result in low-level wind shear
even with the gusty surface winds.

Sunday... Mainly ifr to start, then the conditions are expected
to improve to MVFR during the morning and may improve toVFR
during the afternoon for some areas. There should be a lull in
the showers for a time in the morning, then some showers and a
few thunderstorms develop especially in the afternoon. Southeast
to south winds around 10 knots, with some gusts up to 20 knots
possible during the afternoon.

Outlook...

Sunday night through Thursday... Rounds of showers and
thunderstorms through much of next week though activity will
generally not be widespread and or steady. Periods of sub-vfr
conditions are possible with this activity. SE winds generally
5-15 kt through Tuesday, becoming S Wednesday and Thursday.

Marine
A gale warning remains in effect for all of the coastal waters,
including delaware bay. The winds on delaware bay should drop
below gale force by 06z. The northern portions of the new
jersey coastal waters are expected to have the strongest winds
(40-45 knots). There is a brief window for an isolated gust to
reach 50 knots, but we are uncertain how much mixing will occur
and if those strongest winds mix down to the surface. So for now
we have kept with the gale warning.

Outlook...

Sunday night and Monday... SCA will likely be needed. S-se winds
10- 20 kt with gusts to 25 kt in the coastal atlantic waters.

Waves will continue to remain elevated in the 4-7 ft range.

Monday night through Wednesday... S-se winds will weaken to below sca
criteria. However, a SCA will likely be needed with seas forecast to
remain near 5 ft.

Wednesday night and Thursday... S winds increase slightly to 15-20 kt
with a chance for 25 kt gusts in the coastal waters. Nonetheless, a
sca will likely be needed with seas still around 5 ft.

Rip currents...

high risk of rip currents has been extended through early Sunday
evening for the new jersey and delaware beaches.

Strong onshore flow this evening along with dangerous surf is
resulting in a high risk of rip currents. As for Sunday, the
surf looks to remain agitated despite low pressure well to our
north. The wave period should lengthen some and with a gusty
south to southeast wind, the high risk of rip currents was extended
through Sunday.

An enhanced rip current risk should linger into the early part
of the new week as a stiff southerly flow keeps wave heights
around 5 or 6 feet on the waters off our coast.

Equipment
The kdox radar will remain offline until parts and a maintenance
kit to replace the azimuth and elevation motors are received.

The current estimated return to service is early next week.

Phi watches warnings advisories
Pa... Flash flood watch until 6 am edt Sunday for paz060-070-071-
101>106.

Nj... High rip current risk through Sunday evening for njz014-
024>026.

Flash flood watch until 6 am edt Sunday for njz015-017>020-022-
025>027.

Wind advisory until 4 am edt Sunday for njz012>014-020-026.

De... High rip current risk through Sunday evening for dez004.

Md... None.

Marine... Gale warning until 6 am edt Sunday for anz450>455.

Gale warning until 1 am edt Sunday for anz430-431.

Synopsis... Klein
near term... Gorse robertson
short term... Robertson
long term... Davis klein
aviation... Gorse klein
marine... Gorse klein robertson
equipment... Gorse


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
MRCP1 - 8540433 - Marcus Hook, PA 9 mi29 min 73°F 80°F1006.4 hPa
DELD1 - 8551762 - Delaware City, DE 10 mi29 min ENE 14 G 17 73°F 75°F1005.3 hPa
RDYD1 - 8551910 - Reedy Point, DE 12 mi29 min 73°F 80°F1004.6 hPa
CHCM2 - 8573927 - Chesapeake City, MD 19 mi29 min NE 9.9 G 18 71°F 81°F1004.9 hPa
PHBP1 - 8545240 - Philadelphia, PA 26 mi35 min 72°F 80°F1007.3 hPa
BDSP1 31 mi29 min 72°F 81°F1008 hPa
BDRN4 - 8539094 - Burlington, Delaware River, NJ 44 mi41 min ENE 7 G 11 71°F 81°F1008.7 hPa
DRSD1 - Delaware Reserve, DE 45 mi107 min NNE 6 73°F 1006 hPa73°F

Wind History for Delaware City, DE
(wind in knots)    EDIT      (on/off)   Help
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
Last
24hr
E11
SE11
G16
SE11
G14
E12
E11
G14
E11
E11
E12
E10
E9
NE7
NE9
G13
NE9
E10
NE7
E12
G17
NE14
G18
E17
G23
E21
NE18
G23
NE17
G24
NE15
NE13
G17
NE17
1 day
ago
S6
G9
SE4
G7
S4
SW1
--
W1
--
E4
SE4
E3
SE7
SE5
S6
G9
S8
G13
S8
G12
SE9
G15
S11
G15
S8
G16
S9
G13
SE10
G13
S9
G15
SE14
G18
SE15
SE13
2 days
ago
NE12
NE6
NE8
G11
NE9
NE6
G9
N5
N9
N8
N8
N8
N8
N6
NE3
NE5
NE7
G10
NE5
NE6
NE4
G7
NE5
E5
E3
S5
G12
SE7
G11
SE6
G10

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wilmington, New Castle County Airport, DE4 mi26 minNE 162.50 miHeavy Rain Fog/Mist71°F70°F96%1005.9 hPa
Philadelphia, Philadelphia International Airport, PA20 mi23 minENE 17 G 257.00 miRain72°F70°F94%1007.4 hPa
Chester County Airport, PA24 mi42 minNE 9 G 156.00 miLight Rain63°F62°F100%1008.5 hPa

Wind History from ILG (wind in knots)
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
Last 24hrE8E7E7E6E7E8E9E7NE10NE10NE8NE9NE12NE10NE8E10NE16NE15
G25
NE17
G27
NE22
G29
NE21
G29
NE19
G27
NE15NE16
1 day agoSE6SE7SE4SE3NW3CalmCalmN3--S45S6S9S8S13S14S15S15
G22
S14SE12SE12SE12SE10E8
2 days agoN7N6NE3N7N5N6N5N5N4N9N9N6N7N11N7N5--5NE3NE6N5N3SE8SE8

Tide / Current Tables for Millside, RR. bridge, Delaware
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Millside
Click for Map
Sat -- 01:23 AM EDT     Moonset
Sat -- 02:44 AM EDT     0.56 feet Low Tide
Sat -- 05:51 AM EDT     Sunrise
Sat -- 08:13 AM EDT     5.35 feet High Tide
Sat -- 03:01 PM EDT     0.27 feet Low Tide
Sat -- 03:15 PM EDT     Moonrise
Sat -- 08:25 PM EDT     Sunset
Sat -- 08:47 PM EDT     5.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.51.60.80.61.42.63.74.85.35.14.33.32.31.50.70.30.82.13.44.65.65.85.44.4

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
Sat -- 12:16 AM EDT     0.06 knots Slack
Sat -- 01:25 AM EDT     Moonset
Sat -- 02:46 AM EDT     2.01 knots Max Flood
Sat -- 05:53 AM EDT     Sunrise
Sat -- 06:19 AM EDT     -0.08 knots Slack
Sat -- 08:35 AM EDT     -1.46 knots Max Ebb
Sat -- 11:45 AM EDT     0.03 knots Slack
Sat -- 02:48 PM EDT     2.00 knots Max Flood
Sat -- 03:16 PM EDT     Moonrise
Sat -- 05:36 PM EDT     -0.07 knots Slack
Sat -- 08:25 PM EDT     Sunset
Sat -- 09:03 PM EDT     -2.17 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.81.31.921.81.30.7-1-1.4-1.4-1.2-0.80.51.41.921.71.1-0.9-1.6-2-2.2-2.1-1.8

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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Philadelphia/Mount Holly, PA (23,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Philadelphia, PA
   (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.