Monday, May29, 2017 L-36.com


Marine Weather and Tides
Irmo, SC

Version 3.4
What's New / NOTES
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 6:13AMSunset 8:30PM Monday May 29, 2017 4:59 PM EDT (20:59 UTC) Moonrise 9:18AMMoonset 11:25PM Illumination 19% Phase: Waxing Crescent; Moon at 4 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
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7 Day Forecast for Marine Location Near Irmo, SC
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location: 34.08, -81.18     debug


Area Discussion for - Columbia, SC
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Fxus62 kcae 291845
afdcae
area forecast discussion
national weather service columbia sc
245 pm edt Mon may 29 2017

Synopsis
Ridging over the region will weaken today as a frontal boundary
slowly pushes into the area. The front will stall just south of
the area late Tuesday and remain across the region through the
weekend. This will keep mainly diurnal chances of showers and
thunderstorms in the forecast each day.

Near term through tonight
Plenty of low-level moisture over the area with dewpoints in
the middle to upper 60s. Satellite showing some developing cu
across the upstate and piedmont regions. Moderate instability
begin held in check right now with a warm nose of air around 700
mb, but near term model soundings indicate some cooling at that
level, thus weakening the cap. Shortwave energy moving through
alabama into georgia is expected to induce convection across the
region as the cap weakens through afternoon progresses. Models
seem to indicate that convection should form west of the cwa
later in the afternoon, and then progress eastward through the
evening. Best chance for activity appears to be between 22z-05z,
with lingering activity still possible through the night. Will
continue to increase pops from dry into the high chance category
through the afternoon and into the evening hours. Pops diminishing
slowly during the late overnight hours. Lows tonight will be
mostly in the upper 60s to low 70s.

Short term Tuesday through Wednesday night
Frontal boundary will continue moving toward the area Tuesday
and stall just south of the forecast area Tuesday night. On
Wednesday the front will remain just south of the area as an
upper level trough swings into the eastern us. Instability on
Tuesday will be moderate with pwat values along and ahead of the
front around 1.75 inches. This will result in chances of
thunderstorms during the day with thunderstorms diminishing as
the front moves south of the area late Tuesday evening.

Potential for severe thunderstorms remains low with the main
concern being drier air moving in just behind the front Tuesday
evening. With the front just south of the area on Wednesday and
slightly drier air in place instability will be lower yet expect
to reach the convective temperature so will still have potential
for late afternoon and evening thunderstorms. With models
agreeing the front will be south of the forecast area on
Wednesday have lowered pops slightly. Temperatures will be in
the mid 80s to around 90 for afternoon highs with overnight lows
in the mid 60s to around 70.

Long term Thursday through Monday
High pressure will move across the mid atlantic states on
Thursday then settle offshore of the carolinas Thursday night.

On Friday this high will slide further into the atlantic with
southerly flow returning gulf moisture to the area. With weak
upper level troughing remaining over the eastern us will see
chances of thunderstorms increasing for Friday through the
weekend. With the southerly flow will see pwat values increase
to 1.75 inches or greater for Friday onward which will increase
the potential for heavy rainfall. Temperatures will be near
normal through the long term.

Aviation 18z Monday through Saturday
Vfr conditions expected through the TAF period outside of
showers and thunderstorms during the afternoon and evening hours.

Currently much of the CWA is experiencing some thin cirrus and
developing low-level scattered cumulus. Showers and
thunderstorms are expected to develop off to the west of all taf
sites late in the afternoon, and then spread eastward through
the evening. There still remains some uncertainty in convective
initiation, but isolated to scattered activity expected to
begin between 20-22z. Will continue with current forecast of
having vcts in tafs around that time frame, and will amend
forecasts to account for coverage and movement of activity.

Winds will be out of the west-southwest to around 5 to 10
knots through the period.

Extended aviation outlook... A cold front will stall over the
region through much of the week. The front will help support
scattered thunderstorms and possible restrictions each day.

Cae watches warnings advisories
Ga... None.

Sc... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LMFS1 - Lake Murray SC 5 mi40 min W 4.1 G 7 86°F 1013.9 hPa
WATS1 - Lake Wateree, SC 31 mi70 min S 4.1 G 8.9 88°F 1014.9 hPa

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Columbia, Columbia Metropolitan Airport, SC9 mi2.1 hrsWNW 910.00 miA Few Clouds91°F64°F42%1014.5 hPa
Columbia - Jim Hamilton L.B. Owens Airport, SC12 mi67 minNNW 510.00 miFair91°F64°F42%1014.6 hPa
Winnsboro/Fairfield County Airport, SC17 mi65 minWSW 810.00 miFair88°F64°F46%1015.2 hPa
McEntire Air National Guard Weather Facility Base, SC23 mi2 hrsW 710.00 miFair90°F65°F44%1015.2 hPa

Wind History from CAE (wind in knots)
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Last 24hrSW12SW10SW12SW3CalmS4W4SW3CalmSW3W3CalmW4W3CalmS4W6W6W7W6
G14
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1 day agoW9
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W9W13W10W5SW4CalmW5W5CalmCalmCalmS4SW4SW4W11W11NW9
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2 days agoW15W13W11W4W3CalmW4CalmW4SW3W3W3W5W5W4W6W8W16W15
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G21
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G19

Tide / Current Tables for Bacon Bridge, Ashley River, South Carolina
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Bacon Bridge
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Mon -- 02:03 AM EDT     2.58 feet High Tide
Mon -- 06:14 AM EDT     Sunrise
Mon -- 09:27 AM EDT     -0.09 feet Low Tide
Mon -- 10:16 AM EDT     Moonrise
Mon -- 02:40 PM EDT     2.08 feet High Tide
Mon -- 08:22 PM EDT     Sunset
Mon -- 09:33 PM EDT     -0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.92.42.62.52.21.81.20.60.2-0.1-00.41.11.722.11.91.61.10.60.2-0-00.4

Tide / Current Tables for Pimlico, West Branch, Cooper River, South Carolina
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Pimlico
Click for Map
Mon -- 02:37 AM EDT     2.25 feet High Tide
Mon -- 06:12 AM EDT     Sunrise
Mon -- 09:39 AM EDT     -0.48 feet Low Tide
Mon -- 10:15 AM EDT     Moonrise
Mon -- 03:14 PM EDT     1.81 feet High Tide
Mon -- 08:22 PM EDT     Sunset
Mon -- 09:45 PM EDT     -0.42 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.82.22.221.61.10.5-0.1-0.4-0.4-0.10.51.21.61.81.81.510.50-0.3-0.4-0.1

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Southeast    EDIT
Geos

Wind Forecast for Columbia, SC (16,3,4,5)
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Ground Weather Radar Station Columbia, SC
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weather_mapweather_map weather_map

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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.