B737-700 flight crew reported encountering wake turbulence on descent in the iah area.

Attributes
ACN	1546299
Time
Date	201805
Local Time Of Day	1201-1800
Place
Locale Reference	HOU.Airport
State Reference	TX
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Type 6000
Events
Anomaly	ATC Issue All Types Inflight Event / Encounter Wake Vortex Encounter Inflight Event / Encounter Weather / Turbulence

Narrative:

On approach at 2;000 feet and slowed to 170 knots; ATC vectored our aircraft in tight behind another aircraft for the approach. With autopilot engaged and a turn-on vector to the final approach course; the aircraft encountered what we believe was wake turbulence from the aircraft three miles ahead on final. The aircraft rolled right and we received a 'bank angle' aural warning. Simultaneously; this flight crew sensed the roll rate and immediately disconnected the autopilot and autothrottles to regain control of the excessive roll. We established ourselves on the localizer and glideslope and continued with no further incident.more spacing or better vectors needed to prevent this in the future.

Original NASA ASRS Text

Title: B737-700 flight crew reported encountering wake turbulence on descent in the IAH area.

Narrative: On approach at 2;000 feet and slowed to 170 knots; ATC vectored our aircraft in tight behind another aircraft for the approach. With autopilot engaged and a turn-on vector to the final approach course; the aircraft encountered what we believe was wake turbulence from the aircraft three miles ahead on final. The aircraft rolled right and we received a 'Bank Angle' aural warning. Simultaneously; this Flight Crew sensed the roll rate and immediately disconnected the autopilot and autothrottles to regain control of the excessive roll. We established ourselves on the localizer and glideslope and continued with no further incident.More spacing or better vectors needed to prevent this in the future.

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.