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99GrandTouring
10-04-2003, 05:47 AM
My question is how are you guys predicting your density altitudes?
Say for next tues and thurs night I'm trying to figure out the da, but on accuweather they only give estimated temps?
Where can I get the estimated humitidy and pressures?
HyperGT
10-04-2003, 07:57 AM
www.wunderground.com

Then take those numbers and the elevation of your track and plug it into the ModDepot DA calculator.
Bill Putnam
10-04-2003, 08:49 AM
You can't get a accurate estimation otherwise we would be calling you weather man. :) All I do is check out weather channel for the conditions on the day in question and look at the average barometer for the area and make estimates.

Bill
Bob Cosby
10-04-2003, 05:41 PM
If a certainly track day is really REALLY REALLY important to you, e-mail me a few days in advance with the following info, and I'll give you a DA forecast:

Day and time you intend to race
Track Location
Track Elevation

:)

Bob
99GrandTouring
10-04-2003, 05:55 PM
Originally posted by Bob Cosby
If a certainly track day is really REALLY REALLY important to you, e-mail me a few days in advance with the following info, and I'll give you a DA forecast:

Day and time you intend to race
Track Location
Track Elevation

:)

Bob

I already know when the dates are :)
Bristol TN, bristol Dragway
1475 ft is the elevation...
for this coming tues 10/7, thurs 10/9, and friday 10/17
these are the last 3 days they are open and we are going all days....
Thanks!
AutomaticWeapon
10-04-2003, 07:01 PM
Bob, thanks for the offer.

you have PM. :)

-Mike
Bob Cosby
10-04-2003, 07:34 PM
I can give you a fairly good idea for Tuesday, but Thursday and Friday forecasts are going to be serious swags...it's just too far out. Also, would help to know the time of day - it makes a big difference, and saves me some time (takes much longer to look at morning, afternoon, and evening.

Tuesday: +1070 morning, +2300 afternoon, +1000 evening.

About the same on Thursday and Friday, probably a couple of hundred feet higher though.
99GrandTouring
10-04-2003, 07:44 PM
Originally posted by Bob Cosby
I can give you a fairly good idea for Tuesday, but Thursday and Friday forecasts are going to be serious swags...it's just too far out. Also, would help to know the time of day - it makes a big difference, and saves me some time (takes much longer to look at morning, afternoon, and evening.

Tuesday: +1070 morning, +2300 afternoon, +1000 evening.

About the same on Thursday and Friday, probably a couple of hundred feet higher though.

Sweet! it will be tues evening when we are there...
Thanks!