Sort of Interesting Weather Day

February 7th, 2013 at 6:39 pm by under Chad's WLFI Weather Blog

Its been sort of an interesting weather day.  Rain is almost immediately coinciding with the arrival of clouds after a mostly sunny day for much of the area. 

 We saw the process of adiabatic warming today.  This is air starting at a high elevation & then downsloping & compressing.  This heats the air up, dries it out & acts as a cloud eater.  This said, you often gets this on the western & northwestern edge of a hurricane where you have such rising motion inside it, the outflow spreading out from it, or its “lungs” creates a corridor of sinking area on it top & left outer edges.

Today, intense low pressure is developing south of the Appalachians with wind pivoting around this & up & over the Appalachians.  The air then downslopes into the Ohio Valley & eastern Corn Belt with south-southeast wind component.  This actually is a more common phenomenon than you think in places like Louisville, Kentucky where wind downsloping of the “knobs” frequently warms the city & metro area in the Ohio Valley bowl there, compared to areas nearby.  This can occur there with a southeast wind even without rapidly-intensifying surface low pressure nearby.

You also can get some sinking air out ahead of a cold front, as rising air accompanies the front with rain.  The air is being pulled toward it sinks.

Also, a tongue of warm air originating down in Texas was pulled northward too, all pointing to a relatively warm day ahead of our cold & northwest of intense storm developing in the southeast U.S.

Our relatively humidity dropped from 85% at 9 a.m. to 41% by 3:45 p.m.

With adiabatic warming processes gone, we have cooled off to 43 as of 6:37 p.m. at WLFI after a high of 53.  Logansport is already down to 37.  After a high of 58, Crawfordsville is down to 46, even without rainfall.

 

8 Responses to “Sort of Interesting Weather Day”

  1. Jim says:

    Hey Stoogies have faith chad will bring us nemo next week I have faith.

  2. Mary Anne Best says:

    Temp has gone down to 41* and I have recorded .23 inch rain. So thankful for the rain, sorry snow lovers. your turn will come :-)

    ma in rem

  3. Monster says:

    I am NOT getting my hopes up yet

  4. where is my snow it is all gone

  5. still watching that big strom next week

  6. Jim says:

    Monster I agree

  7. mad man from afghanistan says:

    Jim i hope so.

  8. Chris in Tipton says:

    Raining here…..as of 9:45

    SADLY……Euro and GFS models have taken next weeks potential storm and are suppressing it south of the area. With the history of the models this winter….it could just be one of those things, and by Saturday, we could be back in the action. I am more impressed with the Euro than I am the GFS….in general…..

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