Narrative:

On takeoff from atlanta at marker, aircraft turned to 070 as we climbed to 10000 ft. Directly on the departure corridor was a build up that showed severe on our radar. At the top was a definite swirling hook. The radar was changed from 40- 10 then 5 mi scale. Several calls were made to departure control with requests to climb or turn. Departure said they would not. The captain took the radio and told the controller we were turning to 360 degrees at 10000 ft. Prior to the turn, the captain declared an emergency, then turned. The thunderstorm was barely avoided and all subsequent turns and climbs with departure were normal.

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Original NASA ASRS Text

Title: EMER DECLARED DUE TO HVY WX.

Narrative: ON TKOF FROM ATLANTA AT MARKER, ACFT TURNED TO 070 AS WE CLBED TO 10000 FT. DIRECTLY ON THE DEP CORRIDOR WAS A BUILD UP THAT SHOWED SEVERE ON OUR RADAR. AT THE TOP WAS A DEFINITE SWIRLING HOOK. THE RADAR WAS CHANGED FROM 40- 10 THEN 5 MI SCALE. SEVERAL CALLS WERE MADE TO DEP CTL WITH REQUESTS TO CLB OR TURN. DEP SAID THEY WOULD NOT. THE CAPT TOOK THE RADIO AND TOLD THE CTLR WE WERE TURNING TO 360 DEGS AT 10000 FT. PRIOR TO THE TURN, THE CAPT DECLARED AN EMER, THEN TURNED. THE TSTM WAS BARELY AVOIDED AND ALL SUBSEQUENT TURNS AND CLBS WITH DEP WERE NORMAL.

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.