Friday, September 15, 2006

I think I've got this wind chill thing figured out

Wednesday, I wondered where the wind chill begins and the heat index ends after receiving the following update:

A Few Clouds and 61 degrees F at Fitchburg Municipal Airport, MA

Winds are West at 8 MPH. The pressure is 30.10" (1019.5 mb) and the humidity is 60%. The wind chill is 60. Last Updated on Sep 13, 11:52 am EDT.

Well wouldn't you know, a cold rainy day and night has brought the issue into clarity, even though I still think the whole thing is absurd. Over the last couple of days, I have received these updates:

Rain Fog/Mist and 65 degrees F at Fitchburg Municipal Airport, MA

Winds are Southeast at 3 MPH. The pressure is 30.06" (1018.1 mb) and the humidity is 90%. The heat index is 64. Last Updated on Sep 14, 2:52 pm EDT.

Overcast and 63 degrees F at Fitchburg Municipal Airport, MA

Winds are Northeast at 5 MPH. The pressure is 30.13" (1020.2 mb) and the humidity is 90%. The wind chill is 64. Last Updated on Sep 15, 9:52 am EDT.

So apparently, if the temperature is 65 or above, we get a "heat index" even if the index is below the actual temperature and if the temperature is 64 or below, we have to deal with the "wind chill" even if the chill is above the actual temperature.

Who decides this stuff?

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