Jump to content
  • Member Statistics

    17,587
    Total Members
    7,904
    Most Online
    LopezElliana
    Newest Member
    LopezElliana
    Joined

Heat Wave - June 20-23


CoastalWx

Recommended Posts

  • Replies 1.3k
  • Created
  • Last Reply

I think it may even be a little more than an outside shot, especially if that low closes off. June convective rains can really dump.

Just get that low to cut west and high dews/convection in here and you'll get your wish

If it happens it happens, Still drying out from what we have had so far this month, The container garden is loving it though

Link to comment
Share on other sites

Why does downsloping cause mixing to be superadiabatic? I'm asking physically..it doesn't make a lot of sense in my head. Compression warms the air dry adiabatically.

It's possible to also heat that air that has been compressed, via the sun. We see that a lot in March and April on NW flow.

Link to comment
Share on other sites

It's possible to also heat that air that has been compressed, via the sun. We see that a lot in March and April on NW flow.

Downsloping (plus turbulent mixing) ensures you're at 9.8C/KM (away from Tolland). Include intense solar heating and you're able to go super adiabatic near the bottom of the boundary layer.

Link to comment
Share on other sites

It's possible to also heat that air that has been compressed, via the sun. We see that a lot in March and April on NW flow.

Right...it makes more

sense to talk about insolation causing a superadiabtic lapse rate in the low-levels than it does to talk about compression. If we already mixing dry to 850...how is compression doing anything?

Link to comment
Share on other sites

Downsloping (plus turbulent mixing) ensures you're at 9.8C/KM (away from Tolland). Include intense solar heating and you're able to go super adiabatic near the bottom of the boundary layer.

Yeah exactly. Spring is a classic example of that when the folks in the Berkshires can be 10-12F cooler than BOS.

Link to comment
Share on other sites

Downsloping (plus turbulent mixing) ensures you're at 9.8C/KM (away from Tolland). Include intense solar heating and you're able to go super adiabatic near the bottom of the boundary layer.

good example of that on a lot of the soundings showing up for thur - you can see those 11-12c/km LRs

Link to comment
Share on other sites

Downsloping (plus turbulent mixing) ensures you're at 9.8C/KM (away from Tolland). Include intense solar heating and you're able to go super adiabatic near the bottom of the boundary layer.

basically...we are assuming in areas outside of downslope that they are not getting a perfect dry rate...but they are still superadiabatic near the ground...so it effectively becomes dry. Areas that are downsloping are right at dry...and the superadiabatic lapse in the low-levels is causing them to exceed effective dry to 850?

Link to comment
Share on other sites

Right...it makes more

sense to talk about insolation causing a superadiabtic lapse rate in the low-levels than it does to talk about compression. If we already mixing dry to 850...how is compression doing anything?

Well you are taking that compressed air and actually heating it more. That will actually help raise mixing heights just a bit since you are superadiabatic and the parcel is able to bust into the inversion layer a little higher up in the column. So you have air forced and compressed down a mountainside ensuring adiabatic lapse rates and now intense solar heating from the June sun. It's a good question though.

That's my thought anyways.

Link to comment
Share on other sites

Well you are taking that compressed air and actually heating it more. That will actually help raise mixing heights just a bit since you are superadiabatic and the parcel is able to bust into the inversion layer a little higher up in the column. So you have air forced and compressed down a mountainside ensuring adiabatic lapse rates and now intense solar heating from the June sun. It's a good question though.

That's my thought anyways.

I wonder if and how much downslope can raise the inversion above 850 if we are only talking about several hundred feet.

Link to comment
Share on other sites

Well you are taking that compressed air and actually heating it more. That will actually help raise mixing heights just a bit since you are superadiabatic and the parcel is able to bust into the inversion layer a little higher up in the column. So you have air forced and compressed down a mountainside ensuring adiabatic lapse rates and now intense solar heating from the June sun. It's a good question though.

That's my thought anyways.

How far out from a mountain (or whatever) does that effect reach?

Link to comment
Share on other sites

Well you are taking that compressed air and actually heating it more. That will actually help raise mixing heights just a bit since you are superadiabatic and the parcel is able to bust into the inversion layer a little higher up in the column. So you have air forced and compressed down a mountainside ensuring adiabatic lapse rates and now intense solar heating from the June sun. It's a good question though.

That's my thought anyways.

Actually what it more or less equates to, his lapse rates in the lower levels that are higher than what we would expect with SW winds.

So basically the air would probably be close to dry adiabatic of we had SW winds, lets say. Now, you are taking air and compressing the flow which ensures dry adiabatic flow and throwing solar insolation into the mix. I don't think it would be super adiabatic if it were not from the sun.

Link to comment
Share on other sites

basically...we are assuming in areas outside of downslope that they are not getting a perfect dry rate...but they are still superadiabatic near the ground...so it effectively becomes dry. Areas that are downsloping are right at dry...and the superadiabatic lapse in the low-levels is causing them to exceed effective dry to 850?

Yeah turbulent mixing will get you close to 9.8 but the downslope assist can make sure you keep 9.8C/km in lowest km plus solar insolation and you can really bake.

Link to comment
Share on other sites

Actually what it more or less equates to, his lapse rates in the lower levels that are higher than what we would expect with SW winds.

So basically the air would probably be close to dry adiabatic of we had SW winds, lets say. Now, you are taking air and compressing the flow which ensures dry adiabatic flow and throwing solar insolation into the mix. I don't think it would be super adiabatic if it were not from the sun.

Yeah it can't be but you're able to ensure a deep mixed layer at 9.8 c/km plus super adiabatic near the ground.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...