Do cities form their own high pressure area?

Question

I have heard a theory that metropolitan areas form high pressure areas around them. Like this morning at 5am a hugh line of sever storms was approaching Dallas Ft Worth at 45 mph. Sever weather statements were issued. High winds and small hail were expected.
On the radar, there was large areas of red and purple indicating sever storms.
Then as it got over north east Ft Worth, it seemed to die out.
We got a little wind and only enough rain to wet the street.
What causes that?

Answer 1

your asking a question Ive noticed here over the last couple years also,cause i like watching a storm and most times they seem to weaken over the metro area then redevelop when they hit rural areas to the south or east. i definitely think its to do with all the pavement holding the days heat--maybe that causes air currents to move up from the heat creating kind of a wind shear or maybe the temperature difference isn't so extreme when the front hits the area- or maybe it does create a kind of artificial high pressure bubble over the city--but I'm sure there studying this somewhere but i haven't found a straight answer.

Answer 2

No they don't. Cities produce urban heat islands. Heat leads to rising air which is lower pressure. A storm dies out when it looses its energy and/or moisture. This is usually caused by the storms outflow occluding its inflow or the storm moving into a cooler and/or drier environment.

Answer 3

No.Usually low and high pressure areas cover an area many times bigger than that of the biggest cities.

Answer 4

heat pollution mainly.