The Red Flag Threat Index
 
Matrix showing combinations of RFTI (A) and RFTI (B) for each RFTI value, category, and relationship to RFW criteria. Red cells = non-RFW, maroon cells = typical RFW conditions, purple cells = very rare term values outside a 10-yr climatological database

Matrix showing combinations of RFTI (A) and RFTI (B) for each RFTI value, category, and relationship to RFW criteria. Red cells = non-RFW, maroon cells = typical RFW conditions, purple cells = very rare term values outside a 10-yr climatological database
 

 

The Red Flag Threat Index (RFTI) is defined as:

RFTI = RFTI (A) + RFTI (B)

where:

RFTI (A) = relative humidity term (as determined by a climatological quartile ranking from 2000-2009)

RFTI (B) = wind speed term (as determined by a climatological quartile ranking from 2000-2009)

 

To read the full explanation of the Red Flag Threat Index (RFTI) CLICK HERE.
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