Date: 201604
Local time of day: 0001-0600
Location: ZZZ.Airport, US
Flight conditions: Marginal
Weather elements / visibility: Thunderstorm
Light: Night
Aircraft: Commander 112/A/B/TC
Operator: Personal
Operating under: Part 91
Flight plan: VFR
Mission: Personal
Flight phase: Landing
ATC / advisory: Center ZZZ
Reporter organization: Government
Reporter function: Supervisor / CIC; Enroute
Reporter qualification: Air Traffic Control Fully Certified
Human factors: Situational Awareness
Second reporter function: Enroute; Instructor
Anomaly: Ground Excursion Runway; Inflight Event / Encounter Weather / Turbulence
Detector: Person Flight Crew; Person Air Traffic Control
When detected: Taxi
Result: Air Traffic Control Provided Assistance; Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance; Flight Crew Landed As Precaution; Flight Crew Requested ATC Assistance / Clarification
Contributing factors: Aircraft; Human Factors; Weather
Primary problem: Weather

Narrative: Training on the radar Assist position. Approach called for a manual hand-off on Aircraft X. Radar Controller provided radar and weather advisories to Aircraft X and advised the pilot of the severe weather toward the intended destination. Radar Controller advised pilot of surrounding airport weather and advised landing at an alternate airport. Approach called back to advise me of the alternate airport weather. I told the Radar Controller the information and the controller relayed that to the pilot.After numerous course and altitude changes the pilot said he wanted to get the aircraft on the ground and elected to land at an alternate airport. Radar Controller provided bearing; distance and weather information to the pilot until the pilot reported the airport in sight. The Radar Controller then asked him if he could call to make sure everything went okay and terminated the radar services. We informed the Front Line Manager of the area of all the information we had. The Front Line Manager started a search for airport and contact information to ensure the pilot was able to land safety. We were able to get a hold of the pilot and that's when we were informed the aircraft had landed long and went off the end of the runway.


Second narrative: My trainee and I were training on the Radar Assist position and we accepted a manual handoff from approach for Aircraft X who was operating VFR. After numerous course changes due to significant convective activity; the flight diverted with tremendous assistance from two different radar controllers including descriptions of displayed weather as well as various METAR reports at possible alternate landing sites.After the pilot reported the airport in sight; he requested and was granted a frequency change to the local advisory frequency. Within 5 to 10 minutes after losing radar contact; the supervisor and controllers involved thought it may be a good idea to attempt to reach the pilot after landing to verify a successful conclusion to the flight as convective weather was not far from the airport; it was night; and the pilot though calm during the entire event; had indicated on the frequency that he wanted to get the airplane on the ground. The supervisor was successful in reaching the pilot on his cell phone and at that time; the pilot indicated that the landing had ended with an over-run off the end of the runway and the airplane was in a field; in the dark; with no one apparently around to offer help. At this point; to the best of my knowledge; all normal FAA protocols were followed to assist an aircraft in distress.


Synopsis: An aircraft on a VFR flight landing at an alternate airport due to approaching inclement weather ran off the end of the runway.