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As hurricanes approach, there is a lot of information to share, multiple times from a lot of websites.  These are the sites I like to use, and I will update this list as I post on FaceBook.

Sweetie Link (should update at 2, 5, 8, and 11): http://www.nhc.noaa.gov/storm_graphics/AT11/refresh/AL112017_5day_cone_no_line_and_wind+png/210044_5day_cone_no_line_and_wind.png  

Quick Remarks about Tides, Datums, MLW, MLLW, and NAVD

A note about DATUMs, which is causing confusion for readers who look at the NOAA websites.  As many of you point out, Mean Low Water (MLW), Mean Lower Low Water (MLLW), North American Vertical Datum (NAVD) of 1988 and any of the other datums, are all different, and we can't figure out what datum is being presented for storm surges.  Frequently, storm surges are listed either as number of feet above the current tide.  Also, when talking about inundation, the models will predict how much water will be above the land surface at s specific location.  Terrestrial measurements are frequently using NAVD88, which is what we get from LiDAR surveying and other methods.  In the water, as in a boat coming into a harbor or navigating the waters, we want to know where we are with respect to MLW...that is, what is the least amount of water under our keel so we don't ground.

Here in Charleston, I have spent the last few days running around the harbor edge mapping the water level with an RTK-GPS (good to about 2-cm vertical measurements), and then comparing those data with the gauge height in Charleston AND the local LiDAR data.  We've been doing this for years for 'king tides' and other phenomena, but this week it seems more important. You can see the live Predictions (blue) and Preliminary (red) levels, on the plot of the water levels.  To the left axis, you can see the datum used:  often it starts with Height in Feet (MLLW).  If you scroll down a bit, you can change the axes...and they run vertical datum corrections for you! Let me say, that is great and saves a lot of time!!!   Change the Units to Meters, Timezone to LST/LDT, and Datum to NAVD, and voila!  Tide levels are now in the same value range as the terrestiral measurements created from the LiDAR data.  There is a good graphic of the datums for Charleston Harbor tidal gauge here: https://tidesandcurrents.noaa.gov/datums.html?id=8665530 .

Charleston tide gauge switched over to meters, local time, and NAVD1988 datum.
Charleston tide gauge switched over to meters, local time, and NAVD1988 datum.

 

Links to some of the data and science (Click Blue Bar to Minimize and see other Bars below)

General NOAA buoy data:  http://www.ndbc.noaa.gov/ 

 

Scroll down and click on the box to see other information

Specific to Charleston, South Carolina and my neighbors

FNMOC Significant Wave Height (about 2/3 way down, click loop for Significant Wave Height & Direction):  https://www.fnmoc.navy.mil/wxmap_cgi/cgi-bin/wxmap_DOD_area.cgi?area=n2_nwatl&set=All

Offshore Edisto Wave Heights: http://www.ndbc.noaa.gov/show_plot.php?station=41004&meas=sght&uom=E&time_diff=-4&time_label=EDT  

Folly Island Wind Speeds (North end):  http://www.ndbc.noaa.gov/station_page.php?station=fbis1  

Water Levels

Charleston Harbor: https://tidesandcurrents.noaa.gov/waterlevels.html?id=8665530 

Pro-tip:  change your time to LST/LDT, and Datum to NAVD.  If you live near Charleston, and know your elevation based off LiDAR, the tide gauge should match what you know about your parcel.

Wave Heights

Edisto Offshore:  http://www.ndbc.noaa.gov/show_plot.php?station=41004&meas=sght&uom=E&time_diff=-4&time_label=EDT  

Wind Speeds

Folly Island (North end):  http://www.ndbc.noaa.gov/station_page.php?station=fbis1  

Capers Island (Offshore): http://www.ndbc.noaa.gov/station_page.php?station=41029  

Edisto Offshore:  http://www.ndbc.noaa.gov/station_page.php?station=41004  

Web Cameras

Fripp Island (Crabby Pelican roof):  https://www.wunderground.com/webcams/gldickens3/2/show.html 

Kiawah Island beach:  http://www.earthcam.com/usa/southcarolina/kiawahisland/?cam=kiawahisland  

Wadmalaw (North): https://www.wunderground.com/webcams/jzlogar/1/show.html  

Folly Pier (panning and free):  http://www.surfchex.com/follybeach-web-cam.php 

Folly Washout (Surfline, commercials--turn your volume down):  http://www.surfline.com/surf-report/north-washout-southeast_5293/  

Isle of Palms Pier (Carolina Coast Surf Club): http://www.carolinacoastsurfclub.org/surfcam.php 

Isle of Palms (Windjammer):  http://www.jammercam.com/surfcam.shtml  

Pelicam, Crab Bank (SCCL), Charleston Harbor:  http://coastalconservationleague.org/pelicam/ 

 

Preparation

For general disaster information and what to do to get ready http://ready.gov 

FEMA:  How to prepare for a hurricane PDF https://www.fema.gov/media-library/assets/documents/98105  

Charleston County:  http://www.charlestoncounty.org/departments/emergency-management/files/hurricane-guides/2017-Hurricane-Guide-Color-Full-Size.pdf 

Hurricane Tracks

State Emergency Management Divisions

Some Specific Water Levels and Wave Heights

Carribbean & Bahamas

Land Elevations

MAP OF THE BAHAMAS (with island names): http://all-inclusive-bahamas.com/wp-content/uploads/2014/06/BAHAMAS-1-star.jpg  

Turks and Caicos: http://en-us.topographic-map.com/places/Turks-and-Caicos-Islands-8017023/ 

Mayaguana: http://en-us.topographic-map.com/places/Mayaguana-1568046/ 

The Bahamas (Ctrl-scroll to zoom): http://en-us.topographic-map.com/places/The-Bahamas-2895661/  

Water Levels

St. Thomas:  https://tidesandcurrents.noaa.gov/waterlevels.html?id=9751639 

Isla Viques:  https://tidesandcurrents.noaa.gov/waterlevels.html?id=9752619  

San Juan, PR:  https://tidesandcurrents.noaa.gov/waterlevels.html?id=9755371  

Isla Mora, near Cuba:  https://tidesandcurrents.noaa.gov/waterlevels.html?id=9759938  

Wave Heights

Puerto Rico NE:  http://www.ndbc.noaa.gov/show_plot.php?station=41043&meas=swht&uom=E&time_diff=-4&time_label=AST  

Wind Speeds

Settlement Point, GBI, Bahamas:  http://www.ndbc.noaa.gov/show_plot.php?station=spgf1&meas=wspd&uom=E&time_diff=-4&time_label=EDT    

Web Cameras

DR:  https://www.wunderground.com/webcams/fennic2/1/show.html  

Turks and Caicos:  https://www.wunderground.com/webcams/tcx/1/show.html 

Great Exuma:  https://www.wunderground.com/webcams/Bonefish/2/show.html  

Staniel Cay, Bahamas:  https://www.wunderground.com/webcams/serenitymarty/1/show.html 

Florida

Water Levels

Naples:  https://tidesandcurrents.noaa.gov/waterlevels.html?id=8725520 

Vaca Key (landfall area): https://tidesandcurrents.noaa.gov/waterlevels.html?id=8723970

Key West (west of landfall):  https://tidesandcurrents.noaa.gov/waterlevels.html?id=8724580  

Lake Worth (Palm Beach area): https://tidesandcurrents.noaa.gov/stationhome.html?id=8722670 

Miami: https://tidesandcurrents.noaa.gov/stationhome.html?id=8723214  

Mayport (Jacksonville): https://tidesandcurrents.noaa.gov/waterlevels.html?id=8720218  

Fernandina Beach:  https://tidesandcurrents.noaa.gov/waterlevels.html?id=8720030  

Wave Heights

St. Augustine Offshore (should be good): http://www.ndbc.noaa.gov/station_page.php?station=41117 

St. Augustine direct link to wave height:   http://www.ndbc.noaa.gov/show_plot.php?station=41117&meas=wvht&uom=E&time_diff=-4&time_label=EDT  

Blake Plateau (way East of Jacksonville):  http://www.ndbc.noaa.gov/show_plot.php?station=41010&meas=wdpr&uom=E&time_diff=-4&time_label=EDT  

Fernandina Beach Offshore:  http://www.ndbc.noaa.gov/station_page.php?station=41112 

Near Port St. Lucie: http://www.ndbc.noaa.gov/show_plot.php?station=41114&meas=wvht&uom=E&time_diff=-4&time_label=EDT  

Wind Speeds

Molasses Reef:  http://www.ndbc.noaa.gov/show_plot.php?station=mlrf1&meas=wspd&uom=E&time_diff=-4&time_label=EDT  

South of Miami:  http://www.ndbc.noaa.gov/show_plot.php?station=fwyf1&meas=wspd&uom=E&time_diff=-4&time_label=EDT  

Web Cameras

Fort Meyers Beach Cabana: https://www.earthcam.com/usa/florida/fortmyers/?cam=fort_myers_hd 

Sanibel Island (in path): https://www.earthcam.com/usa/florida/sanibel/?cam=sanibel_hd 

 Sarasota, Siesta Beach: https://www.earthcam.com/usa/florida/sarasota/?cam=siestabeach 

Chiefland Sky Ranch (inland, above Tampa): http://www.chieflandsky.com/ 

Tranquility Bay (may have to wait...may not connect...): https://www.tranquilitybay.com/webcam 

Web Cams in keys, click on map and try them:  https://floridakeys.micromaps.com/html5/ 

St. George Island (NW FL at the Blue Parrot): http://www.blueparrotsgi.com/multimedia/livecam.htm 

**Key West, Beachside:  http://www.floridakeyswebcams.tv/cam.cfm?view=key-west-beachside 

**Dolphin Research Center:  http://www.floridakeyswebcams.tv/cam.cfm?view=dolphin-research-center 

***Live Duval Street (Sloppy Joe's):  http://www.liveduvalstreet.com/ 

East Coast

Tavernier, FL:  https://www.wunderground.com/webcams/DocTom22/1/show.html 

Miami Beach:  https://www.earthcam.com/usa/florida/miamiandthebeaches/?cam=miamibeach7  

Lauderdale:  https://www.earthcam.com/usa/florida/lauderdalebythesea/?cam=windjammer  

Boca Raton, FL: https://www.wunderground.com/webcams/zafer/7/show.html  

Lake Clarke Shores (trees):  https://www.wunderground.com/webcams/jpstuddard/1/show.html  

Jupiter (inland): https://www.wunderground.com/webcams/Joe4speed/2/show.html 

St. Augustine, FL: https://www.wunderground.com/webcams/SaltRun/2/show.html  

Georgia

South Carolina

Water Levels

Charleston Harbor: https://tidesandcurrents.noaa.gov/waterlevels.html?id=8665530 

ACE Basin (no plot, but oxygen etc.): http://www.ndbc.noaa.gov/station_page.php?station=acqs1 

North Inlet (Oyster Landing): https://tidesandcurrents.noaa.gov/stationhome.html?id=8662245  

Springmaid Pier: https://tidesandcurrents.noaa.gov/waterlevels.html?id=8661070  

Wave Heights

Edisto Offshore:  http://www.ndbc.noaa.gov/show_plot.php?station=41004&meas=sght&uom=E&time_diff=-4&time_label=EDT  

Wind Speeds

Fripp Island Nearshore:  http://www.ndbc.noaa.gov/station_page.php?station=41033  

Folly Island (North end):  http://www.ndbc.noaa.gov/station_page.php?station=fbis1  

Capers Island (Offshore): http://www.ndbc.noaa.gov/station_page.php?station=41029  

Edisto Offshore:  http://www.ndbc.noaa.gov/station_page.php?station=41004  

Web Cameras

Fripp Island (Crabby Pelican roof):  https://www.wunderground.com/webcams/gldickens3/2/show.html 

Kiawah Island beach:  http://www.earthcam.com/usa/southcarolina/kiawahisland/?cam=kiawahisland  

Wadmalaw (North): https://www.wunderground.com/webcams/jzlogar/1/show.html  

Folly Pier (panning and free):  http://www.surfchex.com/follybeach-web-cam.php 

Folly Washout (Surfline, commercials--turn your volume down):  http://www.surfline.com/surf-report/north-washout-southeast_5293/  

Isle of Palms Pier (Carolina Coast Surf Club): http://www.carolinacoastsurfclub.org/surfcam.php 

Isle of Palms (Windjammer):  http://www.jammercam.com/surfcam.shtml  

Pelicam, Crab Bank (SCCL), Charleston Harbor:  http://coastalconservationleague.org/pelicam/ 

Murrells Inlet (Dead Dog Saloon): http://www.tripsmarter.com/myrtle-beach/video/live-cams/dead-dog-saloon-live-cam-marshwalk  

Sea Crest (myrtle):  https://www.earthcam.com/usa/southcarolina/myrtlebeach/resort/?cam=seacrest  

Myrtle Beach:  https://www.earthcam.com/usa/southcarolina/myrtlebeach/?cam=myrtlebeach_hd  

Briarcliff Acres, North Myrtle:  https://www.wunderground.com/webcams/dking77/1/show.html  

North Carolina

Water Levels

Wilmington: https://tidesandcurrents.noaa.gov/waterlevels.html?id=8658120  

Wrightsville: https://tidesandcurrents.noaa.gov/waterlevels.html?id=8658163 

Beaufort: https://tidesandcurrents.noaa.gov/waterlevels.html?id=8656483 

Hatteras Coast Guard: https://tidesandcurrents.noaa.gov/waterlevels.html?id=8654467 

Oregon Inlet: https://tidesandcurrents.noaa.gov/waterlevels.html?id=8652587  

Duck (and cover): https://tidesandcurrents.noaa.gov/waterlevels.html?id=8651370  

Wave Heights

Wilmington Offshore: http://www.ndbc.noaa.gov/station_page.php?station=41108 

Diamond Shoals: http://www.ndbc.noaa.gov/station_page.php?station=41025  

Wind Speeds

See wave heights above 

Hatteras: http://www.ndbc.noaa.gov/station_page.php?station=hcgn7  

Web Cameras

Ocean Isle:  http://www.oceanisleinn.com/webcam 

Wrightsville Beach:  http://www.surfchex.com/  

Wrightsville Beach:  http://www.southendsurf.com/  

Holden Beach (may be unavailable):  https://www.earthcam.com/usa/northcarolina/supply/holden/?cam=holdennc  

Morehead City Cam (undo blocker): http://www.witn.com/content/ipcams/377860191.html

Duck Research Pier Cam:  http://cil-www.coas.oregonstate.edu/duck.html  

Virginia

Data

USGS temporary tide sensors: https://stn.wim.usgs.gov/FEV/#IrmaSeptember2017

 

 

In July, my friend and colleague Chuck Bailey enticed Todd Beach and me to embark on an eight-day expedition from Crozet, VA, to Williamsburg, VA.  By water.  187 miles of paddling.  Of course I said yes! as part of my sabbatical I thought it fitting to learn more about the source rocks for the Coastal Plain, and see the river evolve from the Blue Ridge through the Piedmont, across the Fall Zone, and into the Coastal Plain.  Chuck, the eloquent writer that he is, has posted the Trilogy Blog about the trip:

 

 

Enjoy the read!

LickingHoleCreek2015
 
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General Geology of South Carolina

The state of South Carolina is covered mostly by Coastal Plain sediments washed from the Appalachian mountain range over the past few hundred million years.  The Blue Ridge to the west is the highest part of South Carolina, followed by the Piedmont, and then the Coastal Plain.  In the image above, the surficial deposits of the Coastal Plain are in color.  Separated by the Fall Zone, the other older rocks of South Carolina are in plain white.  This dataset comes from the South Carolina Department of Natural Resources Division of Geology.  The map was created by Dr. Harris.  Please This email address is being protected from spambots. You need JavaScript enabled to view it.me to obtain a map without the watermark.