Thursday, January18, 2018 L-36.com


Marine Weather and Tides
Washington Boro, PA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 7:21AMSunset 5:09PM Thursday January 18, 2018 8:35 AM EST (13:35 UTC) Moonrise 8:19AMMoonset 6:47PM Illumination 3% Phase: Waxing Crescent; Moon at 2 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
ANZ530 Chesapeake Bay North Of Pooles Island- 631 Am Est Thu Jan 18 2018
.small craft advisory in effect until 4 pm est this afternoon...
Today..W winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft.
Tonight..SW winds 5 to 10 kt. Waves 1 ft or less.
Fri..SW winds 5 to 10 kt. Waves 1 ft.
Fri night..SW winds 5 kt. Waves less than 1 ft.
Sat..SW winds 5 to 10 kt. Waves 1 ft.
Sat night..W winds 5 kt. Waves less than 1 ft.
Sun..S winds around 5 kt. Waves flat.
Mon..S winds 5 to 10 kt. Waves 1 ft. Showers likely through the night.
ANZ500 631 Am Est Thu Jan 18 2018
Synopsis for the tidal potomac and md portion of the chesapeake bay.. Low pressure will move off the north carolina coast this morning. High pressure will then build south of the area through Sunday. The next cold front will approach the area Monday.

7 Day Forecast for Marine Location Near Washington Boro, PA
   Hourly   EDIT   Help
location: 40, -76.49     debug


Area Discussion for - State College, PA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus61 kctp 181257
afdctp
area forecast discussion
national weather service state college pa
757 am est Thu jan 18 2018

Synopsis
A large are of high pressure centered over the lower mississippi
valley will ridge northeast across the ohio river valley and
into the mid atlantic states today. This weather feature will
maintain fair skies but cold temperatures. Temperatures will
moderate to near normal Friday, then climb well above normal
over the upcoming weekend with mainly dry weather continuing.

The next chance for widespread rain showers will come Monday
into Tuesday with the passage of a cold front.

Near term until 6 pm this evening
Goes16 and regional sfc obs indicates a shallow layer of
orographic stratus and stratocu located near and to the west of
the route 219 corridor (along the spine of the alleghenies)
early this morning.

Model soundings show this cloud layer occupying the thermal
channel of -12 to -18c, which is right in the middle of the
prime dendritic growth zone. We see confirmation of this with
some very light... 4sm -snow being reported at kjst. Flurries
from this cloud layer are expected through 17z today before
temps warm by several deg c in this layer and mixes out a bit.

Over the central and eastern parts of our CWA today, mainly
clear skies and light wind allowed temps to dip into the single
digits, and even near or slightly below zero f throughout some
protected valley locations across the middle susq valley where a
deep fresh snowpack is found.

Later on and elsewhere today, periods of sct-bkn altocu and
cirrus will spill southeast from the glakes as deep layer warm
advection begin with the slow departure of the anomalously
deep, snow-producing sfc and upper low near the outer banks.

Highs this afternoon will be about 5 deg f below normal, and
range from near 20f across the NW mtns to the l30s in the
southeast. Westerly winds will freshen to 10 to 15 kts today,
with gusts in the 25 to 30 kts range later this morning and this
afternoon over the higher terrain of sc and SW pa. Relatively
lighter winds will occur across the eastern zones.

The wind will create a wind chill 15 to 20 degrees f lower than
the actual air temp through today.

Short term 6 pm this evening through 6 pm Friday
Variable amounts of mainly mid and high clouds along with dry
conditions will prevail tonight. A slightly lighter westerly
breeze with significantly lower gusts will result in wind chills
staying steady (or rising slightly) into tonight.

Lows tonight will be in the teens, to near 20f in the southern
pa valleys.

Mid and high clouds increase a bit Friday as do temps, that will
climb to slightly above normal highs.

Long term Friday night through Wednesday
High pressure moving off the southeast coast late in the week
will bring mild and dry weather to the area which will last
through most or all of the upcoming weekend.

A deep low will swing a cold front across the area late Monday
and early Tuesday next week, accompanied by a few period of rain
showers amounting to 1 to 3 tenths of an inch of liq equiv
precip. There is a low probability for a weak wave of low
pressure to develop along the front heading into Tuesday which
could add a few to svrl tenths more and even some light accums
of snow.

Mainly dry weather with just some isolated to scattered snow
showers will follow for Tuesday and Wednesday, with temps
falling to a few deg below normal by the middle of next week.

Aviation 13z Thursday through Monday
The strong gradient that is bringing the drier air and clearing
skies will allow for a period of llws to the region. Though the
wind direction will be within 30 degrees, the speed shear will
be well above 30kts with a LLJ around 40 to 50kts. This will
continue the longest at the western TAF sites, where the central
and eastern TAF sites llws will weaken and end by late Thursday
morning. Once the inversion mixes late this morning, it will be
breezy with gusts in the 10-20 mph range.

Outlook...

thu... MainlyVFR. Breezy.

Fri-sun... MainlyVFR.

Mon... Reduced conditions with rain showers associated with an
approaching cold front.

Hydrology
The threat of ice jamming is diminishing. Dry and colder
weather into mid week will form additional ice as stream flows
and open channels decrease. Another warm up is expected by the
end of the week into the weekend with rain to accompany a
frontal system early next week. Dewpoints not fcst to be as
high as last Friday evening, so expecting less rain and runoff.

Ctp watches warnings advisories
None.

Synopsis... Lambert
near term... Lambert
short term... Fitzgerald lambert
long term... Lambert martin
aviation... La corte ceru
hydrology...



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
CHCM2 - 8573927 - Chesapeake City, MD 49 mi54 min NW 7 G 8.9 19°F 32°F1021.2 hPa
BLTM2 - 8574680 - Baltimore, MD 51 mi48 min NW 1.9 G 7 19°F 33°F1021.5 hPa
FSKM2 - 8574728 - Francis Scott Key Bridge, MD 54 mi48 min W 9.9 G 12 20°F 1021.9 hPa

Wind History for Chesapeake City, MD
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
Last
24hr
NW9
G15
NW10
NW9
G17
N10
G17
N11
G16
N8
G13
NW7
G12
N11
G16
N7
G10
N8
G12
NW7
G12
NW7
N6
G9
NW5
NW5
G9
NW6
G9
NW7
G11
NW5
G8
N8
G13
W4
G11
NW9
G18
NW1
G8
NW2
NW8
1 day
ago
NE2
N1
E3
G6
NE1
S2
G7
S5
S3
G8
NW3
NW3
S2
NW2
NW6
NW3
NW1
NW2
--
--
N6
G9
N5
G8
NW5
NW5
G8
N5
N6
G11
N5
G9
2 days
ago
E5
G11
E7
G10
E5
NE7
NE7
G10
NE5
NE4
G7
NE3
N1
N2
NE2
E2
SE2
SE2
E3
SE1
E5
E3
N3
E3
SE2
N1
N1
SE1

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lancaster, Lancaster Airport, PA13 mi43 minN 010.00 miFair13°F5°F70%1021 hPa
York, York Airport, PA21 mi43 minN 010.00 miFair6°F1°F83%1021.5 hPa
Harrisburg, Harrisburg International Airport, PA21 mi40 minNNE 410.00 miPartly Cloudy14°F6°F71%1020.9 hPa

Wind History from LNS (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
Last 24hrW11NW8NW14NW12NW15NW10NW12NW10
G18
NW7W5W8NW6W8W9W9W6NW4W5NW6NW9W11W10W5Calm
1 day agoCalmSE3E3CalmCalmCalmN4NE3NE3E3CalmNW3CalmW5CalmW6CalmNW4W6NW7NW9NW12NW12W11
2 days agoE6NE7E8E7E5E6E4E5E3CalmCalmNE3NE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE3

Tide / Current Tables for Port Deposit, Susquehanna River, Maryland
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Port Deposit
Click for Map
Thu -- 07:14 AM EST     -0.10 feet Low Tide
Thu -- 07:22 AM EST     Sunrise
Thu -- 08:17 AM EST     Moonrise
Thu -- 11:17 AM EST     1.17 feet High Tide
Thu -- 05:08 PM EST     Sunset
Thu -- 06:09 PM EST     -0.63 feet Low Tide
Thu -- 06:46 PM EST     Moonset
Thu -- 11:56 PM EST     2.13 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.11.91.61.20.70.30-0.100.40.91.21.10.90.50.1-0.2-0.5-0.6-0.5-00.71.42

Tide / Current Tables for Havre de Grace, Susquehanna River, Maryland
   EDIT      (on/off)   Help   One Week of Data
Havre de Grace
Click for Map
Thu -- 05:15 AM EST     -0.32 feet Low Tide
Thu -- 07:21 AM EST     Sunrise
Thu -- 08:16 AM EST     Moonrise
Thu -- 10:54 AM EST     1.56 feet High Tide
Thu -- 04:47 PM EST     -0.11 feet Low Tide
Thu -- 05:08 PM EST     Sunset
Thu -- 06:46 PM EST     Moonset
Thu -- 10:37 PM EST     2.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.30.80.3-0.1-0.3-0.20.10.61.11.51.61.41.10.70.3-0-0.10.10.61.21.82.12.2

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 State College, PA (8,2,3,4)
      (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.