The graphical chart for this period shows off the severity better than words. This article includes the main time line graphic that covers September 11, 2001, and briefly explains the various stories that point there.
The following graphic is from the larger set of graphics that make up the day-for-a-year time line.
The first and most obvious feature of this chart is the number of little fires graphed at September 11, 2001. A fire symbol is used in the charts when the underlying scripture story indicates that something was burned. No other date known on the charts has as many such symbols all pointing at the same date. Indeed, no other date has this many stories pointing at it either. This is a unique day, unlike any other.
The story begins at the top. The trunk day-for-a-year time line indicates this is the start of Saul's reign. The anointing of Saul included a "high place sacrifice" a burning of a sacrificial animal at a high place near the town where Saul was anointed. This was enough of a story for the date, indicating the reasons for the event. Further stories added considerable detail.
The Sodom and Gomorrah story that began in 1998 offsets out to this date indicating the fire portion of the Sodom story, ie: the burning of Sodom and Gomorrah and the associated towns, lands prophetically at this date.
Samson, a blind suicidal Samson, pushed over two columns and killed 3000 Philistines. That event should have happened 60 days earlier according to the trunk story but it lands here because the 3000 are divided and run out at 50 per day, an offset of 60 days. The 50 springs from a reference in Saul's story where thousands are divided into groups of 50.
The two cows burned as the Ark was returned after spending time with the Philistines also offsets from the indicated trunk date to the date September 11, 2001. Here the story includes 4 direct references to the number 5, for a total offset of 20 days.
The Tabernacle story also included offsets, in this case 191 animals sacrificed, offsetting the story to the indicated September 11, 2001, date. 8 more days and the closing assembly suggested by the story and by the remaining animals pointed at the United States congress meeting held September 20, 2001.
Somewhere between late August and early October the time line suggested the prophetic replay of the burning of Nadab and Abihu. Though the exact placement is unknown it is likely these two are also the two cows and the two cities and the two columns seen in the other stories.