B737 flight crew reported encountering severe turbulence on climbout.

Attributes
ACN	1613545
Time
Date	201901
Place
Locale Reference	ZDV.ARTCC
State Reference	CO
Environment
Light	Night
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 435
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 353
Events
Anomaly	Deviation - Altitude Overshoot Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

Climbing out of den westbound over the rlg VORTAC; our aircraft was cleared to climb to fl 320. At approximately fl 290; we encountered an area of turbulence in the moderate range that continued to increase in intensity. At approximately FL310; we entered severe turbulence associated with severe mountain wave. I disconnected the autopilot and autothrottle system in an attempt to control the aircraft from exceeding airspeed and altitude constraints.the aircraft continued to climb uncontrollably to approximately FL330. We informed ATC of the event and requested a block altitude and descended back to FL320. The event lasted approximately one minute before the turbulence subsided to the light-to-moderate range. All passengers and flight attendants were seated and no injuries were reported. We continued to our final destination with no further aircraft systems or weather related problems.

Original NASA ASRS Text

Title: B737 flight crew reported encountering severe turbulence on climbout.

Narrative: Climbing out of DEN westbound over the RLG VORTAC; our aircraft was cleared to climb to FL 320. At approximately FL 290; we encountered an area of turbulence in the moderate range that continued to increase in intensity. At approximately FL310; we entered severe turbulence associated with severe mountain wave. I disconnected the autopilot and autothrottle system in an attempt to control the aircraft from exceeding airspeed and altitude constraints.The aircraft continued to climb uncontrollably to approximately FL330. We informed ATC of the event and requested a block altitude and descended back to FL320. The event lasted approximately one minute before the turbulence subsided to the light-to-moderate range. All passengers and flight attendants were seated and no injuries were reported. We continued to our final destination with no further aircraft systems or weather related problems.

Data retrieved from NASA's ASRS site 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.