Narrative:

We were on an IFR flight. There was a large area of convective activity in southeast oklahoma when we departed; so we planned to divert east around it. Near shreveport; we were well east of the activity (approximately 20 NM) according to our onboard radar and strike finder. We were in IMC and suddenly heard a very loud noise which we assumed to be hail. We turned to heading 090 degrees and told ZFW that we were diverting. We decided upon rsn. After landing there we noticed damage to the radome; leading edges of wings and stabilizers; and to the front of the engine nacelles. I estimate we were in the hail for 5 seconds.

Google
 

Original NASA ASRS Text

Title: C414 IS DAMAGED BY ENCOUNTER WITH HAIL DURING IFR FLT NEAR CONVECTIVE ACTIVITY IN LOUISIANA.

Narrative: WE WERE ON AN IFR FLT. THERE WAS A LARGE AREA OF CONVECTIVE ACTIVITY IN SE OKLAHOMA WHEN WE DEPARTED; SO WE PLANNED TO DIVERT E AROUND IT. NEAR SHREVEPORT; WE WERE WELL E OF THE ACTIVITY (APPROX 20 NM) ACCORDING TO OUR ONBOARD RADAR AND STRIKE FINDER. WE WERE IN IMC AND SUDDENLY HEARD A VERY LOUD NOISE WHICH WE ASSUMED TO BE HAIL. WE TURNED TO HDG 090 DEGS AND TOLD ZFW THAT WE WERE DIVERTING. WE DECIDED UPON RSN. AFTER LNDG THERE WE NOTICED DAMAGE TO THE RADOME; LEADING EDGES OF WINGS AND STABILIZERS; AND TO THE FRONT OF THE ENG NACELLES. I ESTIMATE WE WERE IN THE HAIL FOR 5 SECONDS.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.