WINDROSE

I found a website that gives wind information for many locations in every state in the US.

You may be surprised about the average direction and strength in each of the 12 months in your area.

See : ftp://ftp.wcc.nrcs.usda.gov/downloads/climate/windrose/

I went there to look at Long Beach CA. I was surprised that the wind was not in the "Normal Direction". We always get SW winds here usually 210 to 230. As I looked closer is said the plot was taken from 1961. Are you kidding? I did not know what a sailboat was then.

Dan

Hi Dan,
I wondered about that myself. I found that the 1961 date is the BEGINNING of the database.



Welcome To The
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Note that data files herein are at most updated once an hour.

The plots look like 23 hr graphs so the average windspeed and direction may be misleading.

By the way, what is the conversion from M/S to Kts/Hr?

Windspeed m/s *1.9438445= Windspeed Kts

I looked it up in case anyone is curious.

http://www.srh.noaa.gov/elp/wxcalc/form ... rsion.html for more cool conversions.

I use this handy (free) program for all kinds of conversions. It can do speed conversions from Meters per Second to Knots and all kinds of other cool stuff.

http://joshmadison.net/software/convert/

_________________
Matt Miller
Former - Director of Parts and Accessory Sales
Warranty and Technical Support
Hobie Cat USA
(Retired 11/7/2022)

Google also does conversions.

Just type "convert x to y" in the search box.

For example:

"convert 1 meter/sec to knots" yields:

1 (meter / second) = 1.94384449 knots

The date stamp on the files themselvs is still 2003 so they still seem to be several years old.

Sam

Here is a page that describes in detail how to read the windrose for your area :

http://www.wcc.nrcs.usda.gov/climate/windrose.html

The data is from 1961 through at least 1990.

Please note that the length of the arms relates to frequency, not velocity.

COLOR determines velocity.

Loren

I received this today from :

Jan Curtis, Applied Climatologist
Natural Resources Conservation Service
National Water & Climate Center
Portland, OR

Climate Atlas of the United States

http://www.wrcc.dri.edu/climmaps/

I hope some of you can find find this useful,

Loren

Here is a national map of real time wind direction and velocity over the last 6 hours :

Current United States Wind Maphttp://www.ambientweather.com/cuunstwimap.html

Loren

Sorry for the bad link in the previous message.

Maybe Matt will delete it to avoid confusion.


Here is a national map of real time wind direction and velocity over the last 6 hours :

Current United States Wind

http://www.ambientweather.com/cuunstwimap.html


Loren