Any Unknown or Unlisted Aircraft Manufacturer
Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 500; Flight Crew Total 2050; Flight Crew Type 550
Situational Awareness
Deviation / Discrepancy - Procedural FAR; Inflight Event / Encounter VFR In IMC; Inflight Event / Encounter Weather / Turbulence
Flight Crew Returned To Departure Airport
Human Factors; Weather
I left during VFR conditions to spread cover on a crop 5 miles south of the airport. When I reached the field the weather quickly closed in on me to less than 1 mile visibility and less than 500 ft ceiling trapping me against the ground. I was able to stay at 100 ft AGL and follow my last GPS track back to [the departure airport]. I passed over the city at about 100 ft AGL in order to maintain ground contact and reach the airport. Forecast weather did not call for IMC conditions until later in the day.
Thrush S2R pilot reported overflying a city at low altitude after becoming caught beneath an overcast layer.