Feb 22, 2012

Secret drought decoder ring

KBDI values by county can get sort of complex ...

After all, Florida has 67 counties in all.

Click on map to see statistical and historic charts
for each of Florida's 15 wildfire district
Blackwater historical calendarChipola historical calendarTallahassee historical calendarPerry historical calendarSuwannee historical calendarJacksonville historical calendarWaccasassa historical calendarBunnell historical calendarWithlacoochee historical calendarLakeland historical calendarMyakka historical calendarCaloosahatchee historical calendarEverglades historical calendarOkeechobee historical calendarOrlando historical calendarBlackwater statistical graphChipola statistical graphTallahassee statistical graphPerry statistical graphSuwannee statistical graphJacksonville statistical graphWaccasassa statistical graphBunnell statistical graphWithlacoochee statistical graphLakeland statistical graphMyakka statistical graphCaloosahatchee statistical graphEverglades statistical graphOkeechobee statistical graphOrlando statistical graph

This map clumps the counties into 15 fire management districts.

For one it makes the patterns easier to see.

Even better?

You can click on the map to view each district's KBDI value within the statistical and historic range of the past 11 years: (1) Click on the color-coded districts to view a statistical graph and (2) click on the "circled h's" affiliated with each district to see a calendar chart showing each district's KBDI value from 2000 to present.

Drought severity in Myakka River has risen 
above the 90th percentile for March

This approach lets you really slice and dice through the numbers:

For example, not only is the index highest in the Myakka River District, it's about 200 points (i.e. corrected from mm) higher than the 11-year median for the start of March.  On the other hand the low readings in Chipola are perfectly normal for the panhandle in spring.

Special thanks to the Florida Forest Service for making this data available.

Here's more drought-tracking charts that I'll be updating weekly through the spring.

Click on tiles to view more drought data


Unknown said...

John sent me this comment by email:

"If mm stands for millimeters, that is wrong. KBDI is not in mm. Technically, if KBDI is 200, it means the top two inches of soil is completely dry. We know that is not true for down here because the KBDI can rise and the prairies are still full of water. But, KBDI is something we can follow just using the number as a gauge, 0 is low and 800 is high as it gets. It is like rate a movie between 1 and 10 could be 1 and 800 with 800 the best movie or as dry as it can get. No inches, or meters or anything else. Confused?"

Unknown said...

Hi John, I'll make that correction. That answers a question, too. I've seen inches and mm used, but probably just calling it KBDI points is better.