Sunday, January17, 2021
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Marine Weather and Tides
Indian Trail, NC

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:28AMSunset 5:37PM Sunday January 17, 2021 2:50 PM EST (19:50 UTC) Moonrise 10:35AMMoonset 10:16PM Illumination 20% 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 Indian Trail, NC
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location: 35.07, -80.68     debug


Area Discussion for - Greenville-Spartanburg, SC
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FXUS62 KGSP 171934 AFDGSP

Area Forecast Discussion National Weather Service Greenville-Spartanburg SC 234 PM EST Sun Jan 17 2021

SYNOPSIS. Another upper low will move past to the north tonight bringing a resurgence of upslope snow showers to the North Carolina mountains tonight and Monday. High pressure is expected to build into the region late Monday and Tuesday, which should allow our area to dry out and warm up above normal through mid-week. However, another front will lay down across the region from Texas to the Carolinas late in the week.

NEAR TERM /THROUGH MONDAY/. Fairly quiet conds to begin the near term as the FA area remains in a broad upper trof with a lee sfc trof persisting in wsw/ly to w/ly llvl flow. An upper low located over se/rn IL will continue to develop southeast tonight due to layered CAA downstream and advance a stg h5 vort max across the mtns begging arnd 00z. This vort energy will help enhance increasing upslope moisture and generate -snsh across the TN/NC line beginning arnd 00z.

The snow will continue thru the overnight until waning mid-day Mon when a back-end trof vort max crosses east of the high terrain. Most of the snow will be orographically generated, so not expecting much accum across the mtns valleys, except valleys near the TN line. At elevations abv 3500 feet, will anticipate arnd 1-3 inches thru a 12-14 hr period and have issued a winter weather advisory for these locations tonight thru noon Mon. With the previous high elev snowfall yesterday, localized roadways have become and remain slick in spots due to black ice and/or impacted snow. So, with the additional snowfall tonight, localized driving conditions will become a little worse within the advisory areas.

Outside the mtns, skies will become mostly clear and anticipate good cooling conds overnight. Lows tonight will be arnd freezing non/mtns and u20s mtn valleys. No good chance of fog in the morning as the sfc layer has become quite dry and will remain lightly mixed. The current cold airmass will be maintained Mon, however, some measure of downslope warming along with good insol will allow highs to reach arnd normal levels outside the mtns, while the mtn valleys are still held abt 5 degrees below normal.

SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY/. As of 200 pm Sunday: A low amplitude long wave trough will remain over the eastern Conus through much of the short term. Within this flow pattern, a speed max will dig into the Ohio Valley Mon night into Tue. An attendant occluding frontal zone associated with weakening cyclone will sag toward the forecast area by the end of Tuesday. A lack of significant forcing and limited moisture will yield small precip chances . at best . across the NC mountains Tue afternoon into Tue night. Any subsequent chances for precip associated with the front are expected to be south and east of the forecast area through the end of the short term. Otherwise, temps are forecast to be a little above climo through the period after a relatively cold start Monday night.

LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/. As of 210 pm Sunday: A transition to a flat/zonal flow pattern is expected across much of the Conus during the medium range, with a baroclinic zone lingering over the Southeast through much of the period. In light of this expected transition, it is no surprise that model guidance is struggling with the details of multiple low amplitude short wave troughs that will likely interact with this baroclinic zone. While this will result in some part of the Southeast seeing a fairly active pattern, global models are showing fairly disparate solutions and poor run-to-run consistency regarding chances for precip across our forecast area during mid-to-late week. As such, we're hesitant to commit to anything more than wishy-washy small pops, essentially from late Wed night through much of the remainder of the period. Temps are forecast to begin the medium range a little above normal, possibly returning to around climo by the end of the period.

AVIATION /20Z SUNDAY THROUGH FRIDAY/. At KCLT and elsewhere: VFR conds thru the period at all TAF sites. CIGS will develop periodically at 4-5 Kft in fair-wx Cu outside the mtns while VFR wave clouds persist at KAVL this afternoon and evening. Winds will remain generally out of the SW and become low-end gusty at times this afternoon across the Upstate and at KCLT. With a sfc trof moving into the NC mtns and cross valley flow setting up across the French Broad valley, winds at KAVL will be tricky. For now have nw/ly flow going TEMPO wsw/ly with low-end gusts for a couple hrs this afternoon . then settling generally sw/ly overnight thru the period.

Outlook: Occasional snow showers are possible across the mountains through Monday, but generally not directly affecting KAVL. VFR conditions expected elsewhere thru Wednesday.

Confidence Table .

19-01Z 01-07Z 07-13Z 13-18Z KCLT High 100% High 100% High 100% High 100% KGSP High 100% High 92% High 100% High 100% KAVL High 99% High 91% High 99% Med 78% KHKY High 100% High 100% High 92% High 100% KGMU High 100% High 100% High 100% High 100% KAND High 100% High 100% High 100% High 92%

The percentage reflects the number of guidance members agreeing with the scheduled TAF issuance flight rule category. Complete hourly experimental aviation forecast consistency tables are available at the following link:

www.weather.gov/gsp/aviation

GSP WATCHES/WARNINGS/ADVISORIES. GA . None. NC . None. SC . None.

SYNOPSIS . DEO NEAR TERM . SBK SHORT TERM . JDL LONG TERM . JDL AVIATION . SBK


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WATS1 - Lake Wateree, SC 51 mi81 min W 8 G 14 48°F 1012.9 hPa
LMFS1 - Lake Murray SC 74 mi31 min W 9.9 G 19 47°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Monroe, Monroe Airport, NC5 mi58 minWSW 1410.00 miPartly Cloudy44°F27°F51%1013.6 hPa
Charlotte, Charlotte / Douglas International Airport, NC17 mi59 minW 810.00 miMostly Cloudy46°F25°F44%1012.1 hPa
Rock Hill, Rock Hill - York County Airport, SC21 mi57 minWSW 910.00 miMostly Cloudy45°F26°F48%1012.7 hPa

Link to 5 minute data for KEQY

Wind History from EQY (wind in knots)
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Last 24hrW11
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1 day agoSW7S6S6SW3CalmCalmCalmSW4SW4SW4SW3N3CalmSW6SW7SW7SW9SW8SW10SW12
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2 days agoSW5CalmSW3S3CalmCalmCalmSW7SW4S3S4S6S4SW6S6SW6S433S6S54SW8SW7

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station




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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 numerous 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.