was there much snow on the ground at the time?
On 4 March 2019, an Embraer 145 attempting to land off an ILS approach at Presque Isle in procedure-minima weather conditions flew an unsuccessful first approach and a second in similar conditions which ended in a crash landing abeam the intended landing runway substantially damaging the...
skybrary.aero
"Three days after the accident, the FAA conducted a flight inspection of the runway 01 ILS and confirmed that the LOC signal was out of tolerance by about 200 feet to the right of course. The depth of accumulated snow around the LOC signal transmitter was estimated at between 2 feet (60 cm) and 5 feet (1.5 metres) in the area of the LOC signal transmitter. After this snow had been removed, another FAA inspection six days later found that both LOC and GS signals were within the required tolerances and the ILS was returned to service the following day."