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Latest Cumulus MX V4 release 4.0.1 (build 4023) - 16 May 2024

(Note that 4.1.0 (build 4024) - 05 June 2024 remains available, but usage of this version is not recommended - particularly for Davis stations - and the included utility in this distribution for migrating to v4 is known to contain errors affecting conversion of dayfile.txt)

Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024

Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)

Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki

Beaufort Scale

Discussion and questions about Cumulus weather station software version 1. This section is the main place to get help with Cumulus 1 software developed by Steve Loft that ceased development in November 2014.
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robynfali
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Beaufort Scale

Post by robynfali »

Quick query here, and purely a question

My website says the wind is F3 a light breeze at 18mph, just checking Wikipedia (yeah I know how wonderfully accurate it is :) ) says that 18.3 is an F4 Moderate breeze, which is correct?
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steve
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Re: Beaufort Scale

Post by steve »

On that screen shot, your average wind speed is 10.4 mph, which is F3. The Beaufort scale applies to average wind speed.
Steve
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robynfali
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Re: Beaufort Scale

Post by robynfali »

That'll be why then

Please excuse me, I am going back to my padded room now


Thanks Steve
optrex
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Re: Beaufort Scale

Post by optrex »

Quick question as to why F has been used to represent "force"?

Beaufort force is referred to using B in calculating equations
The Saffir-Simpson scale uses S and the Fujita Scale or Enhanced Fujita scale uses f or F or EF, depending on what is being estimated.

I just think that the term F3 has potential to be misinterpreted.
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steve
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Re: Beaufort Scale

Post by steve »

optrex wrote:Quick question as to why F has been used to represent "force"?
Because that is the form I have seen used by experienced meteorologists in the UK, e.g. Dave Wheeler (who provides this forecast): http://www.orcadian.co.uk/weather-2/

"Generally light winds across Orkney with a F2-3 SE to E’ly wind across Shetland."

"A F5 E’ly breeze may bring a few mist or fog patches to some eastern coasts."

The same form is used (again, by experienced meteorologists, including those who work for the UK Met Office) in the uk.sci.weather newsgroup, which is where I learned much of what I know about the weather.
Steve
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