# SigTor

**URL:** <https://forum.flowx.io/t/sigtor/1272>\
**Category:** Help\
**Created:** [April 11, 2022, 7:05pm UTC](https://forum.flowx.io/t/sigtor/1272 "2022-04-11T19:05:24Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Mackinac](https://forum.flowx.io/letter_avatar_proxy/v4/letter/m/d6d6ee/32.png) [@Mackinac](https://forum.flowx.io/u/Mackinac)\
**Post date:** [April 11, 2022, 7:05pm UTC](https://forum.flowx.io/t/sigtor/1272/1 "2022-04-11T19:05:24Z")

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Hello, Does any of the available overlays show significant tornado parameter, and if not, is there any plans of it being added? Thanks

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**Author:** ![duane](https://forum.flowx.io/user_avatar/forum.flowx.io/duane/32/11_2.png) [@duane](https://forum.flowx.io/u/duane)\
**Post date:** [April 11, 2022, 7:46pm UTC](https://forum.flowx.io/t/sigtor/1272/2 "2022-04-11T19:46:40Z")

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Hello,

It isn’t in Flowx. I don’t know what “significant tornado parameter” is. Can you send more details and I can check whether the data is available or can be added to Flowx.

Cheers, Duane.

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**Author:** ![Mackinac](https://forum.flowx.io/letter_avatar_proxy/v4/letter/m/d6d6ee/32.png) [@Mackinac](https://forum.flowx.io/u/Mackinac)\
**Post date:** [April 11, 2022, 11:42pm UTC](https://forum.flowx.io/t/sigtor/1272/3 "2022-04-11T23:42:02Z")

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Hi, I believe it’s NOAA data. Significant Tornado Parameter (STP) Significant Tornado Parameter (STP) A multiple component index that is meant to highlight the co-existence of ingredients favoring right-moving supercells capable of producing F2-F5 tornadoes.

I often view it on WeatherBell, and [Pivotal Weather](https://www.pivotalweather.com/model.php?m=nam&p=stp&fh=loop&dpdt=&mc=). For HRRR and NAM

Thanks

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**Author:** ![duane](https://forum.flowx.io/user_avatar/forum.flowx.io/duane/32/11_2.png) [@duane](https://forum.flowx.io/u/duane)\
**Post date:** [April 12, 2022, 8:05pm UTC](https://forum.flowx.io/t/sigtor/1272/4 "2022-04-12T20:05:44Z")

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Hi @Mackinac, I did a quick search. I couldn’t find a precomputed download of SigTor but did find a formula. I wonder if Pivotal or Weather Bell downloaded the data or computed it.

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**Author:** ![Mackinac](https://forum.flowx.io/letter_avatar_proxy/v4/letter/m/d6d6ee/32.png) [@Mackinac](https://forum.flowx.io/u/Mackinac)\
**Post date:** [April 13, 2022, 11:37am UTC](https://forum.flowx.io/t/sigtor/1272/5 "2022-04-13T11:37:31Z")

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They may have computed it as it seems the models have a slight variation. I have attached a snippet of CODs render of the data with information that may be more of a clue. Thanks for looking into it.

 ![Screenshot_20220413-073405_Samsung Internet](https://forum.flowx.io/uploads/default/original/1X/dd16b1231757809e3e4bd84b24430f36cffeda83.jpeg)

[weather.cod.edu](https://weather.cod.edu/forecast/legacy/)

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<div class="post-metadata">

**Author:** ![duane](https://forum.flowx.io/user_avatar/forum.flowx.io/duane/32/11_2.png) [@duane](https://forum.flowx.io/u/duane)\
**Post date:** [April 13, 2022, 7:06pm UTC](https://forum.flowx.io/t/sigtor/1272/6 "2022-04-13T19:06:39Z")

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Yeah, I keep finding the "Thompson, et. al. (2003) paper too. I just looked through my notes and found STP was one of the parameters I planned to add from this website: [Suomen Sääkeskus - GrADS scripts](https://www.saakeskus.fi/resources/grads-scripts)

Might need to add more compute power though. We’ll see how we go.

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<div class="post-metadata">

**Author:** ![Mackinac](https://forum.flowx.io/letter_avatar_proxy/v4/letter/m/d6d6ee/32.png) [@Mackinac](https://forum.flowx.io/u/Mackinac)\
**Post date:** [April 14, 2022, 12:24am UTC](https://forum.flowx.io/t/sigtor/1272/7 "2022-04-14T00:24:22Z")

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Good news. Will be looking forward to whatever comes about.