FLT ATTENDANT INJURED WHEN E145 ACR ENCOUNTERS SEVERE WX AND TURB NEAR CTW VOR AS RPTED FROM OBSERVATION BY A ZID CTLR AS ACFT ENTERED HIS AIRSPACE.

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TSTMS WERE SCATTERED THROUGHOUT MY AIRSPACE. I RECEIVED THE HDOF ON THIS E145 FROM ZOB. FROM MY WX DISPLAY; THE E145 WAS FLYING WITHIN AN AREA OF MODERATE TO HVY PRECIP IN ZOB'S AIRSPACE. TOPS OF THIS WX WERE UNKNOWN TO ME. NO OTHER ACFT HAD FLOWN THROUGH THIS WX. THE E145 RPTED EXPERIENCING SEVERE TURB FOR 1 MIN. DURING THIS TIME; A FLT ATTENDANT WAS INJURED AND THE ACFT DIVERTED TO CMH (ORIGINAL DEST WAS IND) AND NEEDED AN AMBULANCE STANDING BY FOR THIS MEDICAL EMER. DURING THE TSTM SEASON WITH HOT; STEAMY WX; IT IS NOW MORE COMMON FOR POP-UP TSTMS TO OCCUR RATHER THAN JUST LARGE DEFINED LINES. IT IS UNFORTUNATE THAT ACFT FLY THROUGH THEM AND OVER THEM AT ALTS THAT DON'T KEEP THEM SAFE FROM UPDRAFTS. I DO NOT KNOW IF THIS ACFT WAS ADVISED OF THIS WX FROM ZOB; BUT THE E145 DID HAVE WX RADAR ONBOARD. IT IS UNFORTUNATE THAT DELAYS ARE PUBLICIZED AS ATC OR USER FAULTS. WX CAUSES THE MAJORITY OF DELAYS. I'M SURE THAT THE E145 PAX WOULD HAVE PREFERRED TO TAKE A GND DELAY ON A SMOOTH; NON-JARRING RWY RATHER THAN 1 MIN OF HORRIFYING SEVERE TURB AT FL310!