Monday, May22, 2017 L-36.com


Marine Weather and Tides
Piney Point, MD

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:48AMSunset 8:20PM Monday May 22, 2017 1:30 PM EDT (17:30 UTC) Moonrise 2:53AMMoonset 3:38PM Illumination 9% Phase: Waning Crescent; Moon at 27 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
ANZ537 Tidal Potomac From Cobb Island To Smith Point- 1032 Am Edt Mon May 22 2017
.small craft advisory in effect Tuesday afternoon...
Rest of today..S winds 10 kt. Waves 1 ft. Showers late this morning, then showers with a slight chance of tstms this afternoon.
Tonight..S winds 5 to 10 kt...becoming nw after midnight. Waves 1 ft. A chance of showers. Patchy fog. Vsby 1 to 3 nm.
Tue..NE winds 10 to 15 kt. Gusts up to 20 kt in the late morning and afternoon. Waves 1 to 2 ft. Showers.
Tue night..NE winds 10 to 15 kt...becoming N 5 to 10 kt after midnight. Gusts up to 20 kt. Waves 2 to 3 ft. Showers likely.
Wed..N winds 5 kt...becoming se in the afternoon. Waves 1 ft or less. A chance of showers.
Wed night..SE winds 5 to 10 kt. Waves 1 to 2 ft. Showers likely.
Thu..W winds 5 to 10 kt. Waves 1 ft. Showers likely in the morning. A chance of showers.
Fri..W winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms.
ANZ500 1032 Am Edt Mon May 22 2017
Synopsis for the tidal potomac and md portion of the chesapeake bay.. A cold front will cross the area by this evening. High pressure may briefly build in tonight into early Tuesday before a low pressure system moves up near the delmarva coast Tuesday night. Small craft advisories may need to be extended into Tuesday night.

7 Day Forecast for Marine Location Near Piney Point, MD
   Hourly   EDIT   Help
location: 38.13, -76.53     debug


Area Discussion for - Baltimore, MD/Washington
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 klwx 221359
afdlwx
area forecast discussion
national weather service baltimore md/washington dc
959 am edt Mon may 22 2017

Synopsis
A warm front will cross the region this morning. A cold front
will move through the area later today. High pressure will
briefly return Monday night before low pressure develops over
eastern carolina Tuesday and moves northeast off the delmarva
Tuesday night. Upper-level low pressure will linger over the
area Wednesday through Friday.

Near term /until 6 pm this evening/
Warm front remains difficult to pick out this morning, although
other surface features and observations indicate we are still
entrenched within the wedged airmass. A small surface low is
located over caswell county, nc, with the warm front likely
bending back and intersecting the cold front which is entering
the western appalachians. Moderate rainfall is beginning to pull
eastward. Rainfall amounts have been up to two-thirds of an
inch, with possibly a higher stripe near an inch in st. Marys
county... But well less than anything that would produce
flooding.

Trends this afternoon are more optimistic. The break in the rain
seen over the shenandoah valley should work eastward. Slow
moving cold front will be inching eastward this afternoon,
though it may not reach the i-95 corridor until this evening.

Instability will be limited at best due early precip and clouds.

However, in daytime heating behind the first round of precip,
500-800 j/kg of CAPE will be possible along and east of i-81,
and have entertained a chance of thunder in this area, with any
scattered showers that form along the front. Think
shear/instability will be weak enough to preclude stronger
storms, but trends will need to be monitored. Will be ending
precip chances along with the dry air infiltrating behind the
front.

Temperatures will still have the opportunity to rise into the
70s this afternoon, but how far will depend on the clouds.

Short term /6 pm this evening through Wednesday night/
High pressure will briefly build across the region tonight.

However, the frontal zone won't be all that far offshore, and
clearing unlikely for point east of the blue ridge.

Guidance has, for a couple of cycles now, been inducing
cyclogenesis across the southeastern united states late tonight
near a 500mb shortwave and the right rear quad of the upper
jet. The track of this low will bring rain back to central
virginia and southern maryland by late tonight. The focus will
remain across southern/eastern areas, with a good dose of
associated precipitation though Tuesday.

One difference this cycle though is the compact nature of the
low (tight precip gradient on the northwestern edge) and
progressive speed. That means that precip will be exiting by
Tuesday evening. Have backed off on Tuesday night precip
substantially. Am hesitant to drop pops entirely as current
guidance suggests, but am at a lower confidence "chance".

A closed upper low will be moving south into the mid-west Wednesday
while a sfc low and associated cold front moves eastward across the
ohio valley. A brief period of subsidence is expected across the mid-
atlantic Wednesday leading to mostly dry conditions for most of the
day however instability will increase across the allegheny front
and creep northward into central va Wed afternoon. This may
cause a few showers and thunderstorms to form however confidence is
low through the afternoon. Mostly dry conditions will come to an end
wed evening as rain progresses from south to north across the
mid-atlantic region into Thu morning. Elevated instability is
expected and thunderstorms are possible Wed night.

Long term /Thursday through Sunday/
A cold front will be in vicinity of the mid-atlantic region
Thursday. Showers and a few thunderstorms should be ongoing thu
morning as low pressure rides along the cold front. Depending on the
speed of the front showers and thunderstorms may continue through
the day Thursday. Shear profiles show weak shear and therefore
thunderstorms are expected to be sub-severe. The caveat is that
heavy rain is possible in thunderstorms. Will need to monitor the
threat if training storms occur.

An upper level trough will move over head thu-thu night. The cold
front should be east of the mid-atlantic region by Fri morning and
northwest flow is expected. Disturbances may move across the region
under the influence of the upper level trough Friday and a chance
for showers exists.

High pressure will build into the mid-atlantic region Friday-
Saturday. Dry weather is expected through Saturday. Low
pressure will move into the ohio valley Sat night and Sun and
showers and thunderstorms are possible during this time.

Aviation /14z Monday through Friday/
Conditions have dropped to ifr in low clouds this morning, and
occasionally vsby in more moderate pockets of rain. This rain is
beginning to pull to the east.

After this initial round of showers, ceilings should gradually
lift. The afternoon will be at least above ifr. By evening,VFR
should prevail. The precise timing of category crossings still a
little bit nebulous. Also, there could be a few more showers in
the afternoon ahead of a cold front, and maybe even a
thunderstorm. Spatial and temporal uncertainties preclude a taf
mention.

Vfr for the rest of the TAF period. However, more rain, with
reduced flight categories will return for the morning push
Tuesday. Once again, ifr a good possibility for much of the day,
with improvement in the evening.

Shra/tsra possible Wed night-thu night as a cold front moves across
the terminals. Sub-vfr conditions possible during this time.

Marine
Winds have dropped to less than 10 kt. Mixing should be rather
poor today in vicinity of showers. Southerly flow will become
west/northwest this evening with a cold frontal passage. Will
have to monitor the potential of thunderstorms reaching the
waters this evening. At the moment wind fields look light and
storms weak, but localized stronger gusts can't be ruled out
should activity develop.

The pressure gradient will tighten Tuesday as low pressure
moves up the coast. Have raised a small craft advisory for the
mid bay and lower potomac, where the gradient will be the best.

As the situation unfolds, the advisory may need to be expanded
or extended.

A cold front will cross the waters thu-thu night. Showers and a few
thunderstorms are possible Wed night through Thu night. Winds become
w-nw Friday.

Tides/coastal flooding
Anomalies have continued to fall to 3/4 foot or less. In
addition, the next tide cycle will be lower astronomically
across all waters. A cold front tonight will bring northwest
winds. Therefore there are no indications that any additional
flooding is imminent. However, a coastal low Tuesday provides
some uncertainty. Guidance ensembles then diverge substantially
through midweek.

Lwx watches/warnings/advisories
Dc... None.

Md... None.

Va... None.

Wv... None.

Marine... Small craft advisory from 2 pm to 6 pm edt Tuesday for anz533-
534-537-543.

Synopsis... Hts
near term... Ads/hts
short term... Hsk/hts
long term... Hsk
aviation... Ads/hsk/hts
marine... Ads/hsk/hts
tides/coastal flooding... Ads/hts


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
PPTM2 - 8578240 - Piney Point, MD 0 mi55 min Calm G 1
LWTV2 - 8635750 - Lewisetta, VA 10 mi55 min NE 2.9 G 4.1 65°F 69°F1016.5 hPa
44042 - Potomac, MD 12 mi41 min NNE 1.9 G 3.9 64°F 1015.9 hPa
SLIM2 - 8577330 - Solomons Island, MD 14 mi55 min Calm G 0 63°F 67°F
COVM2 - 8577018 - Cove Point LNG Pier, MD 20 mi55 min Calm G 1 62°F 1017.5 hPa
BISM2 - 8571421 - Bishops Head, MD 27 mi55 min Calm G 1 65°F 68°F1017.1 hPa
44062 - Gooses Reef, MD 30 mi41 min ESE 1.9 G 3.9 63°F 1017.5 hPa
NCDV2 30 mi55 min SSE 1.9 G 2.9 64°F 69°F1016.4 hPa
CA2 - 8571892 - Cambridge, MD 39 mi55 min 63°F 69°F
44058 - Stingray Point, VA 42 mi41 min NE 3.9 G 5.8 67°F 1016.3 hPa
BSLM2 - Chesapeake Bay, MD 46 mi121 min SE 2.9 61°F 1017 hPa59°F
RPLV2 - 8632837 - Rappahannock Light, VA 49 mi55 min S 6 G 6 1017.2 hPa

Wind History for Piney Point, 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
S10
SE11
SE10
S12
SE15
SE14
SE14
SE13
SE12
SE10
SE9
SE8
E7
E5
NE4
NE6
NE6
NE6
E4
E3
NE2
--
E1
--
1 day
ago
E12
G15
E11
E11
G16
E10
G14
E11
G14
E13
G16
E15
E13
G17
E11
E8
E6
G9
E12
E8
E8
G11
NE7
E11
E9
SE11
SE3
SE6
E11
SE9
SE9
SE11
2 days
ago
N4
N5
S10
SE11
W21
G28
SE3
S3
NE3
SW1
W2
N4
E3
S2
W5
NE6
E9
G12
E9
G12
E15
E13
G17
E15
E15
E13
G17

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity, MD5 mi38 minN 09.00 miLight Rain66°F64°F96%1016.5 hPa
Patuxent River, Naval Air Station, MD13 mi99 minN 010.00 miOvercast63°F63°F100%1017.3 hPa
St Marys County Airport, MD13 mi38 minN 010.00 miOvercast63°F60°F94%1017.3 hPa

Wind History from NUI (wind in knots)
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 24hrE7E7SE6SE9SE8SE7E7E665E6E3E4CalmCalmN4N4NE4N4NE5NE4CalmE3Calm
1 day agoE11
G19
NE14
G19
E10
G18
NE10
G17
E12
G16
E8NE7E8NE11
G17
NE8NE8NE4NE5E3NE4NE5NE6E6E8NE5E7E8E7NE8
2 days agoW7W6CalmSE6SE6E3NE9CalmCalmCalmCalmCalmN3E3CalmCalmN5NE12
G17
NE9NE11
G17
NE13
G17
E12
G20
NE16
G22
E14
G19

Tide / Current Tables for Piney Point, Potomac River, Maryland
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Piney Point
Click for Map
Mon -- 03:52 AM EDT     Moonrise
Mon -- 05:33 AM EDT     0.21 feet Low Tide
Mon -- 05:49 AM EDT     Sunrise
Mon -- 11:43 AM EDT     1.58 feet High Tide
Mon -- 04:37 PM EDT     Moonset
Mon -- 05:34 PM EDT     0.15 feet Low Tide
Mon -- 08:16 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.410.60.40.20.20.40.71.11.41.51.61.410.60.30.20.20.30.61.11.51.7

Tide / Current Tables for Point Patience, 0.1 mile southwest of, Maryland Current
   EDIT      (on/off)   Help   One Week of Data
Point Patience
Click for MapFlood direction 315 true
Ebb direction 145 true

Mon -- 03:29 AM EDT     -0.81 knots Max Ebb
Mon -- 03:52 AM EDT     Moonrise
Mon -- 05:49 AM EDT     Sunrise
Mon -- 07:42 AM EDT     0.00 knots Slack
Mon -- 09:15 AM EDT     0.33 knots Max Flood
Mon -- 11:19 AM EDT     -0.00 knots Slack
Mon -- 03:15 PM EDT     -0.75 knots Max Ebb
Mon -- 04:37 PM EDT     Moonset
Mon -- 07:03 PM EDT     0.00 knots Slack
Mon -- 08:16 PM EDT     Sunset
Mon -- 09:31 PM EDT     0.65 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.4-0.7-0.8-0.8-0.7-0.5-0.20.10.30.30.1-0.2-0.5-0.7-0.7-0.7-0.6-0.3-00.40.60.60.5

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Mid-Atlantic    EDIT
Geos

Wind Forecast for Baltimore, MD/Washington (13,3,4,5)
      (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.