A B737 flight crew deviates for WX but is unable to tell mia departure due to radio congestion.

Attributes
ACN	622262
Time
Date	200306
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : mia.airport
State Reference	FL
Altitude	msl single value : 21000
Environment
Flight Conditions	IMC
Weather Elements	Thunderstorm
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma.artcc tower : iah.tower
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zma.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 70 flight time total : 30000 flight time type : 2500
ASRS Report	622262
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	inflight encounter : weather non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Airspace Structure Environmental Factor Flight Crew Human Performance Weather ATC Human Performance
Primary Problem	Weather

Narrative:

On climb out of miami, scattered buildups all quadrants, asked ATC for deviation approximately 20 mi prior to buildup. Asked ATC for deviation left of course, was told to change frequency and ask on next frequency. Tried contact with ATC, would not return call (much chatter). Could not wait any longer, and took a 20 degree left deviation for WX. When ATC finally responded, we were asked to wait, which was impossible to do and had already started the turn. The reason they asked to wait was they had inbound traffic in the descent (it was not conflicting or serious at the immediate time). Nothing was said and we continued our climb without any further incident.

Original NASA ASRS Text

Title: A B737 FLT CREW DEVIATES FOR WX BUT IS UNABLE TO TELL MIA DEP DUE TO RADIO CONGESTION.

Narrative: ON CLB OUT OF MIAMI, SCATTERED BUILDUPS ALL QUADRANTS, ASKED ATC FOR DEV APPROX 20 MI PRIOR TO BUILDUP. ASKED ATC FOR DEV L OF COURSE, WAS TOLD TO CHANGE FREQ AND ASK ON NEXT FREQ. TRIED CONTACT WITH ATC, WOULD NOT RETURN CALL (MUCH CHATTER). COULD NOT WAIT ANY LONGER, AND TOOK A 20 DEG L DEV FOR WX. WHEN ATC FINALLY RESPONDED, WE WERE ASKED TO WAIT, WHICH WAS IMPOSSIBLE TO DO AND HAD ALREADY STARTED THE TURN. THE REASON THEY ASKED TO WAIT WAS THEY HAD INBOUND TFC IN THE DSCNT (IT WAS NOT CONFLICTING OR SERIOUS AT THE IMMEDIATE TIME). NOTHING WAS SAID AND WE CONTINUED OUR CLB WITHOUT ANY FURTHER INCIDENT.

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.