The Ventura, Iowa crash looks to be a Bell 407 [N445MT], at night and into snow covered field with a fire. All three fatal and nothing much yet on weather conditions at the time of the flight.
The registration is an assumption by the media as that is the assigned airframe, delivered to Mercy Air-Med North out of Mason City, Iowa in 2011. Occupants as given by one source were a nurse Shelly Lair-Langenbau; a paramedic, Russell "Russ" Piehl; and an unnamed Med-Trans pilot. The helicopter had been en-route to Emmetsburg to pick up a patient.