# Is something unusual going on in San Diego? **URL:** \ **Category:** Factual Questions\ **Created:** [November 30, 2021, 5:08am UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184 "2021-11-30T05:08:59Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![nearwildheaven](https://avatars.discourse-cdn.com/v4/letter/n/90db22/32.png) [@nearwildheaven](https://boards.straightdope.com/u/nearwildheaven)\ **Post date:** [November 30, 2021, 5:08am UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/1 "2021-11-30T05:08:59Z")
To make a long story short, I just found out that some flights are diverting to Los Angeles, and [flightradar24.com](http://flightradar24.com) shows almost no activity over the city’s air space, except for a helicopter flying all over the place. What’s up, if anything? ---
**Author:** ![kenobi\_65](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/kenobi_65/32/13178_2.png) [@kenobi\_65](https://boards.straightdope.com/u/kenobi_65)\ **Post date:** [November 30, 2021, 5:12am UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/2 "2021-11-30T05:12:47Z")
The FAA website says that there is a “Traffic Management Program” currently in place, due to fog. [https://www.fly.faa.gov/flyfaa/flyfaaindex.jsp?ARPT=SAN&p=0](https://www.fly.faa.gov/flyfaa/flyfaaindex.jsp?ARPT=SAN&p=0) ---
**Author:** ![Bullitt](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bullitt/32/5725_2.png) [@Bullitt](https://boards.straightdope.com/u/Bullitt)\ **Post date:** [November 30, 2021, 5:13am UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/3 "2021-11-30T05:13:18Z")
I looked at my airplane finder app and there aren’t any commercial airplanes flying there. Planes are grounded and did not seem to be moving. I wonder what’s up? ---
**Author:** ![nearwildheaven](https://avatars.discourse-cdn.com/v4/letter/n/90db22/32.png) [@nearwildheaven](https://boards.straightdope.com/u/nearwildheaven)\ **Post date:** [November 30, 2021, 5:14am UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/4 "2021-11-30T05:14:19Z")
Thanks. That makes total sense now. My sister lives a few miles from the airport, and I was concerned for her safety. I feel much relieved. ---
**Author:** ![Bullitt](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bullitt/32/5725_2.png) [@Bullitt](https://boards.straightdope.com/u/Bullitt)\ **Post date:** [November 30, 2021, 5:14am UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/5 "2021-11-30T05:14:25Z")
Here’s what I saw. [[Album] imgur.com ![](https://i.imgur.com/XiUTKy7.png?fb "imgur.com") ](https://imgur.com/a/7VO8NW3) ---
**Author:** ![Bullitt](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/bullitt/32/5725_2.png) [@Bullitt](https://boards.straightdope.com/u/Bullitt)\ **Post date:** [November 30, 2021, 5:15am UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/6 "2021-11-30T05:15:03Z")
Aah, fog. Makes sense. ---
**Author:** ![kenobi\_65](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/kenobi_65/32/13178_2.png) [@kenobi\_65](https://boards.straightdope.com/u/kenobi_65)\ **Post date:** [November 30, 2021, 5:16am UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/7 "2021-11-30T05:16:19Z")
The NWS site for the San Diego airport currently says that both the air temperature and the dew point are at 56F (so, 100% relative humidity), with no wind at all, and visibility there is only 0.12 miles. [https://forecast.weather.gov/MapClick.php?lat=32.7304&lon=-117.1953#.YaWzPLpMFPY](https://forecast.weather.gov/MapClick.php?lat=32.7304&lon=-117.1953#.YaWzPLpMFPY) ---
**Author:** ![Smapti](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/smapti/32/17938_2.png) [@Smapti](https://boards.straightdope.com/u/Smapti)\ **Post date:** [November 30, 2021, 5:36am UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/8 "2021-11-30T05:36:14Z")
Evening fog is a pretty common occurrence in coastal San Diego. The sun goes down, the cool air from the Pacific rushes in, and visibility drops off pretty quickly. Living by the beach as a kid I got pretty used to hearing the fog horn on the OB pier blowing most mornings before the marine layer burned off. If anything, foggy mornings were preferable to clear mornings - it was always colder on clear mornings and my hands would go numb during my morning bike ride to school. ---
**Author:** ![Joeu](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/joeu/32/2911_2.png) [@Joeu](https://boards.straightdope.com/u/Joeu)\ **Post date:** [November 30, 2021, 8:55pm UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/9 "2021-11-30T20:55:56Z")
I came home yesterday from a visit to San Diego, and I can confirm that on Sunday night the fog bank that rolled in a half-hour before sunset was massive and impenetrable. Growing up in San Diego, I had flights home diverted to LA many times. Sometimes we would rent a car and drive the rest of the way, or the airline would put us in a hotel overnight until the next morning’s clearing. ---
**Author:** ![nearwildheaven](https://avatars.discourse-cdn.com/v4/letter/n/90db22/32.png) [@nearwildheaven](https://boards.straightdope.com/u/nearwildheaven)\ **Post date:** [November 30, 2021, 9:05pm UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/10 "2021-11-30T21:05:47Z")
I should add that my sister lives on a hilltop, so maybe the fog didn’t affect her neighborhood all that much. ---
**Author:** ![DavidNRockies](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/davidnrockies/32/6279_2.png) [@DavidNRockies](https://boards.straightdope.com/u/DavidNRockies)\ **Post date:** [November 30, 2021, 9:06pm UTC](https://boards.straightdope.com/t/is-something-unusual-going-on-in-san-diego/955184/11 "2021-11-30T21:06:28Z")
I consulted with the band, America. Here was **[their take](https://www.youtube.com/watch?v=C5A_pLLh1bo)**: _Ain’t it foggy outside?_ _All the planes have been grounded._ [as a guy who spend half his life in San Diego … “Yep” to what everybody else already said: not at all uncommon in SD. **Really** common in San Francisco (OhByTheWay)]