Hi,
Currently, 11.30 am, on the Wangaratta Vic Weatherzone page the fire danger is shown as 14.9
On the BOM fire weather page it is shown as—Forest fire danger 12 and Grassland fire danger 4.
I have noted often that they differ more often than not.
I was wondering why this is?

Regards…

Jim

Following my earlier:
at 12 noon Weatherzone fire danger at Wangaratta = 19
BOM fire danger at Wangaratta Forest 16 grassland 6

Regards…

Jim

Hi again.
It would seem that I am the only one who cares about this or nobody knows what the answer is?
Today. Jan 3 2018 @ 1530 hrs:
WZ 28.4 C 26% WSW 24 _ 35 FDI 23.1
BOM 28 C 26% WSW 24 _ 35 FDI forest 19 Grassland 8
Consistently different.
I believe WZ uses the higher FDI (forest in this case) which is understandable but what I can't understand is why the consistent difference with what the BOM shows on the Fire Weather page?
Regards…
Jim

I believe WZ and BOM use different formulas to calculate the Fire Danger Index.

Thanks Seabreeze; it would look like that's the case.

regards…

See most of South Australia and the Mallee, Wimmera & South West districts of Victoria have a Fire Weather warning in place today - temps of over 40 degrees forecast and low humidity, poor things but the Tour Down Under is on around Adelaide and one of the requests of organizers is for sightseers to not park their cars in dry grass. Well lets hope this is not ignored however where else are they supposed to park?
Remembering the Black Tuesday bushfires near Port Lincoln SA, started 10th January 2005 which killed nine souls, injured many more, burnt 77,964 hectares, 47,000 stock losses (poor creatures, horrible way to go) and so much infrastructure losses etc.
This was started by a man parking on the side of road with his exhaust system igniting dry vegetation.
Let us hope motorists remember history.

The BOM version takes account of Drought Factor and KDBI which use recent rainfall and temperatures to work out how dry the bush and grassland is. The WZ number assumes worst case.