Cleaner, crisper rotation tracks

We are really happy when public safety agencies use the imagery from http://ondemand.nssl.noaa.gov/ to show the impact of the recent tornadoes in Illinois.  Hey, that’s our stuff, we want to shout. It reminds us of why we do what we do.

But there’s a lot of noise on those accumulation products, noise that can be removed by the use of Multiple Hypothesis Tracking (MHT).  We couldn’t do MHT on-demand or in real-time because it is so slow, but just a few weeks ago, we figured out a way to do it faster with not much of a tradeoff in noise removal.

We repeated the analysis of the Illinois outbreak using the faster method and boy, is it faster! We can process an hour of data in 5 minutes!  (Here are the cleaned-up rotation tracks for the Illinois tornadoes. It is a KML file, so view it in Google Earth.) MHT will be implemented on the ondemand website in a few days.  So, the next time you see folks sharing Rotation Tracks images, they will be cleaner and crisper.

Rotation Tracks today

Rotation Tracks today

Rotation Tracks with MHT (very, very slow)

Rotation Tracks with MHT (very, very slow)

Optimized MHT

Optimized MHT