Friday, July19, 2019 L-36.com


Marine Weather and Tides
Grasonville, MD

Version 3.4
NOTICE
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 5:53AMSunset 8:28PM Friday July 19, 2019 6:41 PM EDT (22:41 UTC) Moonrise 9:26PMMoonset 7:18AM Illumination 92% Phase: Waning Gibbous; Moon at 18 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
ANZ540 Eastern Bay- 436 Pm Edt Fri Jul 19 2019
Rest of this afternoon..S winds 10 kt. Waves 1 ft.
Tonight..SW winds 10 to 15 kt with gusts to 20 kt... Becoming W 5 kt late. Waves 1 to 2 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft.
Sat night..SW winds 5 to 10 kt. Waves 1 ft.
Sun..SW winds 5 kt. Waves less than 1 ft.
Sun night..SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.
Mon..W winds 5 to 10 kt. Waves 1 ft. Showers likely. Tstms likely
Tue...nw winds 5 to 10 kt. Waves 1 ft. Showers likely. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 436 Pm Edt Fri Jul 19 2019
Synopsis for the tidal potomac and md portion of the chesapeake bay.. High pressure will build over the southeastern states through the weekend. A cold front will approach the waters from the great lakes and pennsylvania Sunday night, then cross the waters early next week.


7 Day Forecast for Marine Location Near Grasonville, MD
   Hourly   EDIT   Help
location: 38.88, -76.25     debug


Area Discussion for - Philadelphia/Mount Holly, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kphi 191907
afdphi
area forecast discussion
national weather service mount holly nj
307 pm edt Fri jul 19 2019

Synopsis
Bermuda high pressure will remain in control of the weather much of
the weekend. A few weak system will move north of the area tonight
and Saturday. A strong cold front will approach Monday and cross the
area by Tuesday. Cooler and drier air will follow this front and
remain into the middle of next week. High pressure will settle
across the area from the great lakes region. &&

Near term until 6 am Saturday morning
**excessive heat warning in effect**
main story in this near term period is the building mid-level ridge
the excessive heat. Latest 2 pm observations show dewpoints in the
middle to upper 70s and heat indices in excess of 105. In the most
urban environments overnight tonight, temperatures may not drop
below 80 degrees. And that's the issue... Lows around 80 will offer
very little recovery before temperatures climb once again after
daybreak Saturday. Elsewhere, low temperatures will be in the 70s,
this includes the poconos and NW nj.

It appears the majority of the region will remain lightly capped
into this evening. This will help to prevent convection. But there
are some showers and thunderstorms developing out ahead of the mcv
well to our west. These showers and thunderstorms may clip our zones
tonight north of i-78.

Skies will be partly cloudy north to mostly clear south overnight.

Winds will be light from the southwest. Some light fog is possible
around daybreak.

Short term 6 am Saturday morning through 6 pm Saturday
**excessive heat warning in effect**
Saturday will be the hottest day of the year thus far (Sunday could
top Saturday). Actual air temperatures will be in the 90s. The most
urban areas will approach 100. Dewpoints will be similar to today,
in the mid to upper 70s. So with the added heat, apparent
temperatures will exceed today and climb into the 110 to 115 range.

Winds will be out of the west southwest 10 mph or less. There will be
little breeze to offset the heat. The exception will be the beaches,
close to the water and where a seabreeze should develop. With the
westerly flow, the seabreeze will not penetrate far inland.

With all the heat, soundings show a capped environment most of the
day tomorrow. There may be a little window of opportunity for
convection to develop across terrain or the surface trof. No more
that slight chance pops have been added across our western zones.

Most will remain dry.

Long term Saturday night through Friday
**excessive heat warning in effect into Sunday.**
a transition from heat wave back to below normal temperatures
during the long term. As usual, a round of tstms will occur
during the transition. The extremely humid air mass will cause
the tstms to be accompanied by heavy rains and possible flooding.

Sat night... Mostly fair but a few showers tstms possible across the
southern poconos. Hazy. Hot and humid. Lows in the upper 70s to low
80s.

Sunday... Continued hot and humid, but TSTM chances higher then sat
with an approaching cold front nw. Highs again upper 90s with some
100's in some areas. Excessive heat warnings will continue.

Sunday night thru Monday night... A cold front slowly crosses the
area. Occasional tstms with severe weather and flooding possible.

Highs Monday about 10 degrees cooler than Sunday (mostly low 90s),
but humidity still high.

Tuesday and Wednesday... A few showers early across delmarva,
but overall fair and much more comfortable. Highs will be a
little below normal with readings Tue Wed in the low mid 80s.

Thu fri... Much uncertainty. Temperatures back near normal.

Mostly fair, can't rule out a few afternoon showers both days.

Aviation 19z Friday through Wednesday
The following discussion is for kphl, kpne, kttn, kabe, krdg, kilg,
kmiv, kacy and surrounding areas.

Tonight... MainlyVFR. There could be some MVFR visibilities across
the climatologically favored terminals toward daybreak. Variable
wind 5 kt or less.

Saturday... GenerallyVFR. MVFR is possible due to visibility
restrictions in haze... Mainly in the morning. West-southwest wind 5
to 10 kt.

Outlook...

Saturday night... Hazy. MVFR vsbys possible.

Sunday thru Tuesday... Sct tstms with low vsbys and CIGS possible.

MVFR haze outside of the showers tstms. Best chc for tstms Monday.

Wed...VFR. Fair weather.

Marine
Tonight... Sub-sca conditions expected. There could be some wind
gusts from the southwest in excess of 20 kt this evening, but they
will subside into the 10 to 15 kt range overnight. Seas will be in
the 3 to 4 foot range.

Saturday... Sub-sca conditions expected. Winds less than 10 kt with
seas 2 to 3 feet.

Outlook...

winds will remain well below SCA criteria Saturday night and early
Sunday. After that, winds and seas will increase, but probably still
remain sub-sca as a cold front approaches the waters. Thunderstorms
with strong winds gusts are possible Monday into Tuesday.

Rip currents...

breaking waves around 2 to 3 feet are expected along with a medium
period south to southeast swell. As a result, there should be a
low risk for the development of dangerous rip currents for the
rest of today.

Conditions are forecast to be similar on Saturday, with the low
risk expected to continue.

Climate
Record maximum high and low temperatures for:
7 19
site high year low year
abe 99 1930 74 2013
acy 98 1963 79 2013
phl 100 1930 81 2013
ilg 100 1999 81 2013
rdg 100 1930 78 1952
ttn 98 2011 79 2013
mpo 92 1991 70 2013
ged 101 1953 77 2013
7 20
site high year low year
abe 101 1980 76 1942
acy 97 1991 79 2015
phl 99 1930 81 2015
ilg 100 1895 79 2015
rdg 100 1980 77 1942
ttn 99 1980 78 2015
mpo 93 1980 69 1988
ged 100 1977 81 2013
7 21
site high year low year
abe 101 1980 75 1980
acy 99 1981 77 1991
phl 103 1930 79 2017
ilg 102 1957 77 1972
rdg 102 2011 77 2011
ttn 101 1930 78 1980
mpo 94 2011 72 2011
ged 101 1957 79 2017

Phi watches warnings advisories
Pa... Excessive heat warning until 10 pm edt Sunday for paz054-055-
060>062-070-071-101>106.

Nj... Excessive heat warning until 10 pm edt Sunday for njz001-
007>010-012>027.

De... Excessive heat warning until 10 pm edt Sunday for dez001>004.

Md... Excessive heat warning until 10 pm edt Sunday for mdz008-012-
015-019-020.

Marine... None.

Synopsis... O'hara
near term... Kruzdlo
short term... Kruzdlo
long term... O'hara
aviation... Kruzdlo o'hara
marine... Kruzdlo o'hara
climate...



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
TPLM2 - Thomas Point, MD 10 mi41 min SSE 12 G 13 87°F 85°F1012.7 hPa (-1.5)81°F
CPVM2 11 mi53 min 88°F 85°F
44063 - Annapolis 12 mi35 min S 9.7 G 12 87°F 86°F1011.9 hPa
APAM2 - 8575512 - Annapolis, MD 14 mi53 min 92°F 1011.4 hPa
CA2 - 8571892 - Cambridge, MD 23 mi59 min 94°F 89°F1012.3 hPa
TCBM2 - 8573364 - Tolchester Beach, MD 23 mi59 min S 7 G 12 92°F 87°F1012 hPa
44062 - Gooses Reef, MD 24 mi35 min SSE 9.7 G 9.7 87°F 1013 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 28 mi53 min W 12 G 14 94°F 1011.7 hPa
FSNM2 28 mi71 min W 14 G 15 94°F 1011.9 hPa
BLTM2 - 8574680 - Baltimore, MD 32 mi59 min Calm G 2.9 96°F 83°F1011.3 hPa
COVM2 - 8577018 - Cove Point LNG Pier, MD 34 mi53 min S 8.9 G 9.9 88°F 1013 hPa
SLIM2 - 8577330 - Solomons Island, MD 40 mi53 min WSW 6 G 8 93°F 87°F1012 hPa
WASD2 - 8594900 - Washington, DC 41 mi59 min SW 5.1 G 9.9 95°F 87°F1012.1 hPa
BISM2 - 8571421 - Bishops Head, MD 47 mi59 min SSW 8.9 G 11 88°F 89°F1013.3 hPa

Wind History for Cambridge, MD
(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
NW6
W5
W4
NW1
S4
G8
SW4
SW5
SW4
SE3
SW4
W2
W3
W4
W2
NW4
G7
NW5
NW6
NW6
G9
NW8
G11
NW5
W6
SW5
G10
SW4
G10
SW6
1 day
ago
S4
G8
W8
G13
SE4
S1
S3
SE6
S4
S7
G11
S6
G10
S6
G10
S3
SW4
G7
SW5
G8
SW7
G11
S7
G10
SW7
SW7
G10
W5
G11
W8
G11
W5
W4
G8
SW7
G13
SW9
W7
G11
2 days
ago
S9
G12
S10
G13
S6
G10
S5
S4
SE4
S4
G7
S4
S6
S6
G9
S6
G9
S5
G8
SW5
S7
SW5
G8
SW4
G8
SW5
S5
G9
SW4
G8
S8
G12
SW7
G10
S9
G15
S9
G14
S10
G13

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bay Bridge Field, MD8 mi61 minS 810.00 miFair95°F77°F56%1012.2 hPa
Easton / Newman Field, MD11 mi54 minSSW 410.00 miClear93°F75°F56%1013.5 hPa
Annapolis, United States Naval Academy, MD14 mi47 minSSE 910.00 miA Few Clouds94°F79°F62%1011.9 hPa

Wind History from W29 (wind in knots)
7
PM
8
PM
9
PM
10
PM
11
PM
-12
PM
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 24hrN5CalmCalmS3S3CalmCalmSW5SW5W6W7W4NW4W4W4W5SW4W3W3S4S8S7SW6S6
1 day agoW8
G18
W4SW3SW3S6S3S3S4SW4S4CalmSW4W4S5SW6W6SW4W3SW5W5S6SW7S5W6
2 days agoS7S5S8S8SW5SW4S4S5S7S6S5S6S5S8S8SW6S4S6SE8S10S10S9
G17
S9S9

Tide / Current Tables for Claiborne, Eastern Bay, Maryland
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Claiborne
Click for Map
Fri -- 05:55 AM EDT     Sunrise
Fri -- 06:32 AM EDT     1.82 feet High Tide
Fri -- 08:18 AM EDT     Moonset
Fri -- 01:41 PM EDT     0.53 feet Low Tide
Fri -- 06:55 PM EDT     1.33 feet High Tide
Fri -- 08:27 PM EDT     Sunset
Fri -- 10:25 PM EDT     Moonrise
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
0.50.50.711.41.61.81.81.71.51.20.90.70.60.50.60.81.11.31.31.31.10.90.7

Tide / Current Tables for Baltimore Harbor Approach, Maryland Current
   EDIT      (on/off)   Help   One Week of Data
Baltimore Harbor Approach
Click for Map
Fri -- 01:23 AM EDT     -0.55 knots Max Ebb
Fri -- 03:56 AM EDT     0.00 knots Slack
Fri -- 05:54 AM EDT     Sunrise
Fri -- 07:32 AM EDT     0.98 knots Max Flood
Fri -- 08:18 AM EDT     Moonset
Fri -- 10:49 AM EDT     -0.00 knots Slack
Fri -- 02:12 PM EDT     -1.02 knots Max Ebb
Fri -- 05:48 PM EDT     0.00 knots Slack
Fri -- 08:28 PM EDT     Sunset
Fri -- 08:32 PM EDT     0.62 knots Max Flood
Fri -- 10:25 PM EDT     Moonrise
Fri -- 11:30 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
-0.4-0.5-0.5-0.300.40.70.910.80.4-0.1-0.5-0.9-1-1-0.7-0.30.10.40.60.60.40.2

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_A
GOES 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)
      (on/off)   Help

Ground Weather Radar Station Dover AFB, DE
   (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.