B737-700 flight crew unknowingly departed san to the east with the weather below takeoff minimums.

Attributes
ACN	1415108
Time
Date	201701
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	B737-700
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Inflight Event / Encounter Weather / Turbulence

Narrative:

We departed san diego runway 9 below minimums of 400' and 1 3/4 visibility. At pushback the ATIS reported weather 400' and 1 3/4 visibility. We were number seven or eight for departure. Visibility from the cockpit was not considered an issue. I was not concerned the weather might be below takeoff mins. Our push to takeoff was 33 minutes. The ATIS changed to 400' and 1 1/4 visibility. We followed other aircraft in takeoff sequence with the weather unknowingly below mins. I failed to check the airport takeoff minimums page. After takeoff I heard another aircraft challenge the tower about the minimums for takeoff. I later checked the takeoff minimums chart and recognized my error.crew must verify takeoff minimums regardless of perceived adequte conditions and not rely on tower controller. The company should add a safety alert on san diego's unusually high takeoff minimums.

Original NASA ASRS Text

Title: B737-700 flight crew unknowingly departed SAN to the east with the weather below takeoff minimums.

Narrative: We departed San Diego Runway 9 below minimums of 400' and 1 3/4 visibility. At pushback the ATIS reported weather 400' and 1 3/4 visibility. We were number seven or eight for departure. Visibility from the cockpit was not considered an issue. I was not concerned the weather might be below takeoff mins. Our push to takeoff was 33 minutes. The ATIS changed to 400' and 1 1/4 Visibility. We followed other aircraft in takeoff sequence with the weather unknowingly below mins. I failed to check the airport takeoff minimums page. After takeoff I heard another aircraft challenge the Tower about the minimums for takeoff. I later checked the takeoff minimums chart and recognized my error.Crew must verify takeoff minimums regardless of perceived adequte conditions and not rely on Tower Controller. The Company should add a safety alert on San Diego's unusually high takeoff minimums.

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.