There seems to me, to be a serious bug in the program that generates these "probability" displays.
Most certainly, the C column here is totally wrong, and the "1" actually means 100%. The D column is wrong, too. Other strike areas that are dead center of this track show the same false report. I really wouldn't trust this data as being real meaningful.
GALVESTON TX 8 17 1 X 26
...
"C FROM 1AM SAT TO 1PM SAT"
Naw, the first colums are individual probablities within time slots, the last is cumulative.
What I think is remarkable is that NO is only half as likely as Port Arthur.