The tower controller's competence has nothing to do with weather. The tower controller's sphere is clearing planes for take-off and landing. There is also a clearance controller, a ground controller for taxiing, and an approach or departure controller when in the air near the airport environment, local controllers, not to mention TRACON (Terminal Radar Aprroach Control) controllers, ARTCC (Air Route Control Center) Controllers or "Centers", and finally ATCSCC Controllers (Air Traffic Control System Command Center)... lotta people to make it work... but as the pilot in the commercial said, he called dispatch, which all the airlines have and they look at the weather and best route, etc. to keep operations going, noticed I didn't say smoothly and on time, but to coordinate and get the flight up in the air sooner AFTER the weather passed, but glad the commercial made you laugh for five minutes straight... now if your're interested in a little reading material that pilots have to read, learn, study and be tested on...
http://www.risingup.com/fars/
Being a pilot myself, "competence of tower controller" has nothing to do with it. The most basic of basic of Federal Aviation Regulations known as FAR's, which believe me has a lot of rules and governement speak, is this...
Sec. 91.3 - Responsibility and authority of the pilot in command.
(a) The pilot in command of an aircraft is directly responsible for, and is the final authority as to, the operation of that aircraft.
(b) In an in-flight emergency requiring immediate action, the pilot in command may deviate from any rule of this part to the extent required to meet that emergency.
(c) Each pilot in command who deviates from a rule under paragraph (b) of this section shall, upon the request of the Administrator, send a written report of that deviation to the Administrator.
See what I mean about government speak... that's just Part 91 concerning General Operating and Flight Rules, Part 61 contains the info for Certifcation of Pilots, Part 135 for Charter Ops and Part 121 Certification and Operations that the big boys use (airlines)
But to get back to the premise of my comment, as stated by the very basic of flight rules, it is the pilot in command, not the competency of tower controller, that makes the decisions to ensure the safety of the flight and when to go or not go.
Just thought you ought ot know.