Average Annual Thunderstorm days 2

[NAZ55]

Where can I find average annual thunderstorm days for lightning protection study in texas?

 

[PHovnanian]

A quick Google of "isokeraunic map" got this:

http://www.tpub.com/content/NAVFAC/hdbk419a_vol1/hdbk419a_vol10109.htm

There may be better maps out there.

 

[NAZ55]

Phovnanian,

Thanks for the link. It is really difficult to see any information on the map you pointed out. I hope others might be able to guide me to some better maps

 

[DRWeig]

Go to

http://www.vaisala.com

and drill down into the weather measurement category / then lightning detection category / then data and archive reports.

There are seasonal and multi-year lightning activity studies with really good geographic selection criteria.

Vaisala is the company that owns the National Lightning Detection Network that NOAA and all the weather bureaus use.

Good on ya!

Goober Dave

 

[jghrist]

IEEE Std 998, IEEE Guide for Direct Lightning Stroke Shielding of Substations has a thunderstorm day map of the USA. There is also a thunderstorm day map of the USA at

http://www.lightningsafety.com/nlsi_info/lightningmaps/US_TDightning.html

and one at

http://www.srh.noaa.gov/srh/jetstream/tstorms/tstorms_intro.htm.

These are all different.

There is also a flash density map at

http://www.lightningsafety.com/nlsi_info/lightningmaps/US_FD_Lightning.pdf

 

[NAZ55]

Thank you all for your response.

I wasn't sure if the map shown in IEEE Std 998 is still usable and wanted to see what sources or links others were using to figure lightning flash density and average annual thunderstorm days etc for their shielding studies.

 

[EEJaime]

If you look up Thompson Lightning Protection, inc. at

http://www.TlpInc.com

you will find a risk assessment link that provides an isoceraunic map of the US and also the methodology for the lightning risk assesment calculation.

Regards,
EEJaime

 

[kithiljr]

Contact a TX NOAA office, ask for the Warning Coordinator Meteorologist. It is his job to give you what you need.