NOAA Wind Graph Question - SailNet Community
 
LinkBack Thread Tools
post #1 of 8 Old 04-10-2007 Thread Starter
Member
 
Join Date: Feb 2007
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
NOAA Wind Graph Question

The example NWS NOAA graph below shows wind speed, gusts and direction. My question regards the bars attached to each forecasted hourly wind speed data point. I know the orientation of the bar represents wind direction, but what do the single vs. double hashes at the end of each bar represent?

Also, is the bar length refer to variability? Although my example doesn't show much difference in bar length, I've noticed that it is sometimes different.


Last edited by Bryan53; 04-10-2007 at 06:29 PM.
Bryan53 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 8 Old 04-10-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
The short bar is 5 knots, the longer bar is 10 knots. See this page for a full explanation.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #3 of 8 Old 04-10-2007 Thread Starter
Member
 
Join Date: Feb 2007
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Thanks for the explanation and the link!
Bryan53 is offline  
Quote Quick Reply Share with Facebook
post #4 of 8 Old 04-10-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
Glad to help... BTW, those are used by the pilot charts and a lot of other nautical-related documentation, so it is good to be able to read them.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #5 of 8 Old 04-10-2007
Senior Member
 
Join Date: Mar 2006
Location: VA
Posts: 2,046
Thanks: 1
Thanked 4 Times in 4 Posts
Rep Power: 10
 
Where did you find that wind graph? I know about the barbs from my aviation background but have never seen a forecast graph like that. I looked on the NOAA site but couldn't find anything like that chart. Could you post a link?

I assume they are surface winds vs winds aloft?
PalmettoSailor is offline  
Quote Quick Reply Share with Facebook
post #6 of 8 Old 04-10-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
You can find something quite similar over at SailFlow.com - RI- Rhode Island Wind Data

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #7 of 8 Old 04-11-2007 Thread Starter
Member
 
Join Date: Feb 2007
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Starting here:
National Weather Service Southern Region homepage
Select your region, then the town to get the standard forecast view. Scroll down to the bottom of that page to the “Additional Forecasts and Information” section and select the “Hourly Weather Graph” link. You can then check the boxes for the desired parameters including wind to display the graph for your area.
Bryan53 is offline  
Quote Quick Reply Share with Facebook
post #8 of 8 Old 04-11-2007
Senior Member
 
Join Date: Mar 2006
Location: VA
Posts: 2,046
Thanks: 1
Thanked 4 Times in 4 Posts
Rep Power: 10
 
Gotcha'. Thanks.

There is so much info on that site that I'm constantly amazed. I probably visit NOAA at least as much as anyone here (I often use it for work) and I've never seen that product.
PalmettoSailor is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Wind Orientation Mark Matthews Learning to Sail Articles 0 03-06-2005 07:00 PM
Charging with Wind Power Kevin Jeffrey Cruising Articles 0 04-21-2003 08:00 PM
Understanding Apparent Wind Steve Colgate Learning to Sail Articles 0 11-10-2002 07:00 PM
Understanding Apparent Wind Steve Colgate Seamanship Articles 0 11-10-2002 07:00 PM
Understanding Apparent Wind Steve Colgate Racing Articles 0 11-10-2002 07:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome