Thursday, April2, 2020
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Marine Weather and Tides
Hemby Bridge, NC

Version 3.4
NOTICE
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 7:05AMSunset 7:46PM Thursday April 2, 2020 11:15 PM EDT (03:15 UTC) Moonrise 12:38PMMoonset 2:31AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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 Hemby Bridge, NC
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location: 35.11, -80.62     debug


Area Discussion for - Greenville-Spartanburg, SC
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FXUS62 KGSP 030154 AFDGSP

Area Forecast Discussion National Weather Service Greenville-Spartanburg SC 954 PM EDT Thu Apr 2 2020

SYNOPSIS. High pressure slowly builds into the region through Saturday. A weak cold front moves toward the area on Sunday then stalls over the area Monday and moves north as a warm front on Tuesday.

NEAR TERM /THROUGH FRIDAY/. Evening Update . With good rad cooling expected and winds weakening . made lowering adjs to min temps by blending in the latest and cooler NBM guidance. This still gives a small area of mainly patchy frost across the SC/NC Piedmont. Some uncertainty exists with mixing potential overnight . so the HWO mention still looks good for this possibility.

730 PM Update . No major changes needed to the going fcst. Gusts are slowly dying down and relegated mainly across the higher terrain. Expect temps to slowly drop in a dry atmos thru the next update.

As of 2pm EDT Thursday: Some patches of cirrus and a few very widely scattered fair-weather cumulus are the only clouds this afternoon as northwesterly winds continue to dry the atmosphere. With generally good insolation, highs are warming into the 60s in piedmont areas. Benign weather is courtesy of a mid-level ridge that is moving-in behind the synoptic system that produced some wind and precipitation the last 2 days. This ridge will gradually move eastward and become more centered over the GSP CWA on Friday. Winds should continue a weakening trend, but Eastern surface low wobbles around the Cape Cod area, keeping some steady northerly to northwesterly wind component through the day, with a few gusts to 15kts this afternoon and maybe a few tomorrow. Continued drying and some wind will increase fire danger concerns on Friday, but conditions still look below product threshold, except possibly for a PNS. Clear and dry conditions overnight will also give some chance for patchy frost in isolated locations again Friday morning. Some frost was seen this morning, and should be less on Friday as forecast lows are a little warmer. Some wind will also help mitigate any frost prospects.

SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/. As of 130 PM EDT Thursday: The short term period starts quietly Friday night with the Carolinas still under the influence of surface high pressure as a pinched upper ridge nears the area. Another dry and mostly sunny day is expected Saturday with max and min temps a few degrees above average. A pattern shift begins on Sunday as the upper ridge moves overhead bur flattens, and a surface front/upper shortwave move into the area. Neither feature will provide much forcing, and with little deep moisture return expected ahead of the front's arrival Sunday, pops will stay low outside the mountains and most sites will just see an increase in cloud cover. Upper heights will change little on Sunday, with max and min temps remaining a couple degrees above average.

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. As of 200 PM EDT Thursday: Another pattern shift as the medium range begins Sunday night with low-level SErly flow finally beginning a more substantial moistening trend that will continue through the day on Monday. The surface front will lay over the area on Monday, though better upper forcing and deep moisture won't arrive until late Monday afternoon/evening, so pops don't increase above the slight chance range until later in the day. There is decent model agreement that pops will maximize on Tuesday as an upper shortwave moves overhead and finally coincides with the weak surface boundary and better moisture, but it should still be noted that all of these features are poorly forced and could easily shift in time. Better forcing will depart Wednesday, though the continued presence of the weak surface boundary will keep pops in the chance range Wednesday and even potentially part of Thursday. The overall pattern amplifies at the end of the medium range, but very poor model agreement and poor run-to-run consistency implies very low confidence in the forecast past day 7. Max and min temps will run 5-10 degrees above average early in the week before maximizing Wednesday and decreasing back closer to normal as heights fall towards the end of next week.

AVIATION /02Z FRIDAY THROUGH TUESDAY/. At KCLT and elsewhere: A VFR TAF set over all terminals thru the period. Strong hipress will continue to build in from the NW and create deep layered drying. Surface winds will remain up a little overnight and dispersion will offset any fg threat albeit sfc tdd/s will also remain high thru daybreak. The sfc p/grad will be tighter over the ern areas during the day Fri as the atmos becomes better mixed . so included low-end gusts at KCLT and KHKY Also. low-end gusts are likely during the afternoon at KAVL as winds become channeled with the high center building in.

Outlook: Expect VFR conds into the weekend.

Confidence Table .

02-08Z 08-14Z 14-20Z 20-00Z KCLT High 100% High 100% High 100% High 100% KGSP High 100% High 100% High 100% High 100% KAVL High 100% High 100% High 100% High 100% KHKY High 100% High 100% High 100% High 100% KGMU High 100% High 100% High 100% High 100% KAND High 100% High 100% High 100% High 100%

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

FIRE WEATHER. Conditions on Friday will remain dry and breezy, and with fuels drying out, again think there is a possibility of fire weather concerns. Min RHs will drop below 25% in some spots tomorrow afternoon in NE GA and across Upstate SC and the NC Piedmont. Winds will also increase, becoming gusty in the afternoon especially in the NC Piedmont as deep mixing occurs. Criteria will be very close to that needed for Fire Danger Statements, and further coordination will be needed to determine the need for statements in SC, NC, and GA. Though low RH values can't be ruled out on Saturday, lower winds and moisture recovery should prevent the need for a FDS.

GSP WATCHES/WARNINGS/ADVISORIES. GA . None. NC . Fire Danger Statement from Friday morning through Friday evening for NCZ035>037-056-057-068>072-082-501>510. SC . None.

SYNOPSIS . RWH/WJM NEAR TERM . SBK/WJM SHORT TERM . 17 LONG TERM . 17 AVIATION . SBK FIRE WEATHER . 17


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WATS1 - Lake Wateree, SC 54 mi45 min SSE 1 G 1 50°F
LMFS1 - Lake Murray SC 77 mi55 min WNW 2.9 G 5.1 58°F 1014.9 hPa

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Charlotte, Charlotte / Douglas International Airport, NC18 mi83 minNNW 410.00 miFair55°F28°F37%1015.7 hPa

Link to 5 minute data for KEQY

Wind History from EQY (wind in knots)
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Last 24hrN8NW4NW3NW4NW4N7N6CalmCalmW3W4NW4W3W3W3N9N11
G18
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1 day agoNE9
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NE10NE9N6N8N7N12N9NW7N9N8N5N7N6N13
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2 days agoW4CalmW6NW3NW3NW3CalmCalmCalmNE4N9N6NE12NE7
G16
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G16
NE9

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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
Wind Forecast for Greenville-Spartanburg, SC (23,6,7,8)
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Ground Weather Radar Station Columbia, SC
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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.