Author Topic: Fire Weather Index  (Read 5018 times)

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Offline prvrt

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Fire Weather Index
« on: April 23, 2009, 08:22:11 PM »
I need a little help figuring out the Fire Weather Index. It is not showing correctly on my website. Today it was showing 36 of 31 on the index and Extreme. Being in the 60's today and high humidity, I doubt that those numbers are even close. I would be guessing more around 5 on the index. I can not remember what I setup up or if it is pulling the info from the Davis. Any help would be appreciated.
Davis Instruments 6163-Wireless VantagePro2 Plus w/wireless Anemometer, Software = Weather Display
Blackfoot, Idaho

Offline Weather Display

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Re: Fire Weather Index
« Reply #1 on: April 23, 2009, 09:34:17 PM »
the data is calculated by WD
note that its a combination of indexes
with the other indexes all being as equally important
(and they will drop when the humidity is high)
there is a link for more information explaning the values
Brian
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Offline BfdWx

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Re: Fire Weather Index
« Reply #2 on: April 23, 2009, 09:45:32 PM »
WD uploads the FWI once per day, I think at 1:00pm. A lot can happen during that time that's why I use the Chandler Burning Index (CBI). To me it is a much better picture of the current fire danger. For instance if the FWI is 50 at 1:00pm and then it starts to rain at 2:00pm there will be no change in the FWI until tomorrow. The CBI will drop immediately. Just google Chandler Burn Index for an explanation of how it works. There are PHP scripts available in this forum to assist with posting. :grin:

Regards,

Jack

Offline prvrt

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Re: Fire Weather Index
« Reply #3 on: April 23, 2009, 10:45:42 PM »
I just looked at my CBI and it shows 13.6 which sounds better. The problem is, I am using a modified Ajax dashboard which has graphics which correspond to the 0-31 numbers. I don't see how this can be at 36 and Extreme fire danger (in WD)when it is really Low fire danger. We do not hit Extreme until July. If I am 36 now, it will be showing 90 or higher in August. I understand there are multiple indexes being used to figure this number but it seems wrong by a long ways.
Davis Instruments 6163-Wireless VantagePro2 Plus w/wireless Anemometer, Software = Weather Display
Blackfoot, Idaho

Offline Weather Display

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Re: Fire Weather Index
« Reply #4 on: April 24, 2009, 01:31:05 AM »
WD also calculates the CBI
Brian
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Offline Curly

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Re: Fire Weather Index
« Reply #5 on: April 24, 2009, 07:45:02 AM »
Quote
WD uploads the FWI once per day, I think at 1:00pm.
I have all of these fire weather tags in the testtags file and they appear to update all day long.
CBI FFMC ISI DMC FWI BUI DC

Maybe the FWI is in one of those daily files that gets uploaded once a day. ?

http://www.weather.ricksturf.com/wxFire.php


Offline Cienega32

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Re: Fire Weather Index
« Reply #6 on: May 24, 2009, 07:59:04 PM »
Curly - that is one OUTSTANDING 'Fire Danger' info page!

Pat ~ Davis VP2 6153-Weatherlink-Weather Display-StartWatch-VirtualVP-Win7 Pro-64bit
www.LasCruces-Weather.com   www.EastMesaWeather.com

Offline lddaly

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Re: Fire Weather Index
« Reply #7 on: May 24, 2009, 08:04:34 PM »
Curly - that is one OUTSTANDING 'Fire Danger' info page!
Agree. The whole website looks great.

Offline Curly

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Re: Fire Weather Index
« Reply #8 on: May 24, 2009, 08:28:20 PM »
Thanks!



 

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