A320 captain reported an egpws alert during approach to ont airport.

Attributes
ACN	1737886
Time
Date	202003
Local Time Of Day	0601-1200
Place
Locale Reference	ONT.Airport
State Reference	CA
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Events
Anomaly	Inflight Event / Encounter CFTT / CFIT

Narrative:

Vectors to takoe the IAF fix for 26R at ont. Assigned 4500 ft. To cross takoe at or above 4300 ft. We were in IMC approaching takoe from the southeast approximately 5 miles from fix. Got egpws alert with terrain pull up. Started egpws maneuver and alert went away immediately. Climbed to approximately 5000ft and continued approach.cause: we were assigned to descend to 4500 ft from socal after deviating around weather. There is a tower on a hill in that area which is around 3300 ft. I am speculating that tower may have caused the alert. The event was too quick and did not last long at all to analyze all factors. Pass on to socal to use a higher altitude in that particular area until over the IAF. But the chart dictates that 4500ft should have been adequate.

Original NASA ASRS Text

Title: A320 Captain reported an EGPWS alert during approach to ONT airport.

Narrative: Vectors to TAKOE the IAF fix for 26R at ONT. Assigned 4500 ft. to cross TAKOE at or above 4300 ft. We were in IMC approaching TAKOE from the SE approximately 5 miles from fix. Got EGPWS alert with Terrain Pull Up. Started EGPWS maneuver and alert went away immediately. Climbed to approximately 5000ft and continued approach.Cause: We were assigned to descend to 4500 ft from SOCAL after deviating around weather. There is a tower on a hill in that area which is around 3300 ft. I am speculating that tower may have caused the alert. The event was too quick and did not last long at all to analyze all factors. Pass on to SOCAL to use a higher altitude in that particular area until over the IAF. But the chart dictates that 4500ft should have been adequate.

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.