Professor Michael Swords makes some very interesting comments about the radar data in the video below, explaining how the returns were at least as bright as commercial aircraft 'but four times bigger', he also mentions how the object was originally plotted at 18000ft but within 15 seconds it ascended vertically at a speed of around 1000mph - also how the UFO broke from one object into three objects (which he describes as 'fundamentally mysterious') .
See 4:35On the evening of March 8, 1994, residents of Southwest Michigan began seeing strange things in the skies over Lake Michigan to the south of Holland. Blue, white, red, and green lights, sometimes attached to cylindrical objects, and sometimes performing unusual maneuvers, were reported.
911 operators began receiving calls at around 9:30 p.m. about something that looked like "a string of Christmas lights way up in the sky." It wasn't just a few people reporting these things; it was counties all up and down Lake Michigan. Some sources said 300 witnesses, including several police officers, saw the lights.
There were so many reports that one of the Ottawa County 911 operators decided to call the National Weather Service radar operator at Muskegon. The conversations that 911 had with the NWS operator were taped and later made their way into the media. The radar operator's voice could be heard describing abrupt movements of the object and multiple objects appearing on the radar screen..
Transcript of the 08 MARCH 1994 Ottawa County 911/National Weather Service tapesNWS: I'm looking at it in the vertical now and I... not really.. ok, wait a minute something right...there. Ok, lets see what that is... looks like a... there's a larger return down there... let's see, that looks like um... up about maybe... (garble) goes up about 6,000 feet and about... um
BACKGROUND VOICE: Presumed at NWS: Coulda been a plane.
NWS: Well it's pretty big...wait a minute
BACKGROUND VOICE: Presumed at NWS: That's weird..
NWS yeah, um...I got it on manual now... I'm just kinda um...I'm continuously um radiating on it...and um, it looks like it's steady right now.....................(garble)...... I'm getting it now at um, about 12,000 feet... and it's uh......(this appears?) a pretty strong return
NWS:.......... but...... yeah, I've never seen...Now I'm getting multiple returns.
911: One of the people that called that I just had happened to talk to said it looked like a bunch of cylindrical objects...
NWS: Well we...OH MY GOD!... WHAT IS THIS!?
911:...they were going together and coming apart.
Professor Swords also provides more info below about the CUFOS investigation into the case and the UFO's movement on the radarscope - there are also reproductions of eye-witness UFO sketches and inevitable claims of witness harassment.
Holland MI Radar-Visual UFO Case, March 8, 1994, part one
Holland, MI Radar-Visual UFO Case, part two.
The Holland Michigan Radar-Visual UFO Case, part three and final.
Audio -Police Dispatch Call
Seeing a UFO was unforgettable