Notams can in fact be difficult based on the numbers at major airports. Fargo ND only had 8 Notams in effect and this would have been the first one.
FDC 5/5699 ZMP ND..AIRSPACE FARGO, ND..TEMPORARY FLIGHT RESTRICTION. DUE TO THE U.S. NAVY BLUE ANGELS, THE U.S. NAVY LEAPFROGS, THE USMC HARRIER AND VARIOUS OTHER AERIAL DEMONSTRATIONS, EFFECTIVE 1507231700 UNTIL 1507232200, 1507241700 UNTIL 1507242200, 1507251600 UNTIL 1507252200, AND 1507261600 UNTIL 1507262200. PURSUANT TO 14 CFR SECTION 91.145, MANAGEMENT OF AIRCRAFT OPERATIONS IN THE VICINITY OF AERIAL DEMONSTRATIONS AND MAJOR SPORTING EVENTS, AIRCRAFT OPERATIONS ARE PROHIBITED WITHIN A 5 NM RADIUS OF 465430N0964859W OR THE FARGO /FAR/ VORTAC 360 DEGREE RADIAL AT 9.4 NM, SFC-16000FT UNLESS AUTHORIZED BY ATC. MARK RINGHAM, PHONE 701-866-9078, IS THE POINT OF CONTACT. THE FARGO /FAR/ ATCT, PHONE 701-235-8894, IS THE COORDINATION FACILITY. 1507231700-1507262200EST
The more relevant issue however is Allegiant's policy of flight planning with the absolute minimum fuel. The flight was notified by enroute control the airfield would be closed and did not have enough fuel to divert to a airfield 70 miles away or just hold for 20 minutes and land at Fargo.