En route aircraft initiates WX diversion without prior ATC approval.

Attributes
ACN	585501
Time
Date	200306
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : fpr.airport
State Reference	FL
Altitude	msl single value : 2000
Environment
Flight Conditions	IMC
Weather Elements	Thunderstorm
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	general aviation : personal
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot oversight : pic
Qualification	pilot : commercial pilot : cfi pilot : instrument
Experience	flight time last 90 days : 30 flight time total : 2200 flight time type : 400
ASRS Report	585501
Person 2
Affiliation	government : faa
Function	controller : radar
Events
Anomaly	inflight encounter : weather non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : exited adverse environment flight crew : returned to original clearance
Supplementary
Problem Areas	Weather Passenger Human Performance ATC Human Performance
Primary Problem	Weather

Narrative:

Controller did not grant a turn to go around what I thought was a thunderstorm. She got busy and I made a turn to stay clear of storm. She later called me on it, at which time I told her to declare an emergency if necessary.

Original NASA ASRS Text

Title: ENRTE ACFT INITIATES WX DIVERSION WITHOUT PRIOR ATC APPROVAL.

Narrative: CTLR DID NOT GRANT A TURN TO GO AROUND WHAT I THOUGHT WAS A TSTM. SHE GOT BUSY AND I MADE A TURN TO STAY CLR OF STORM. SHE LATER CALLED ME ON IT, AT WHICH TIME I TOLD HER TO DECLARE AN EMER IF NECESSARY.

Data retrieved from NASA's ASRS site as of July 2007 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.