View Single Post
Old 11-11-2009, 09:30 PM   #42
RickRay
INJACC
 
RickRay's Avatar
 
Drives: 2010 CGM 2LT/RS AUTO
Join Date: Jan 2009
Location: Montreal (South Shore)Quebec, Canada
Posts: 6,518
Quote:
Originally Posted by scrming View Post
Hmmm... sounds like something wasn't set up right... the .048 is awfully low...

Here's a vapor pressure calc:

http://www.csgnetwork.com/vaporpressurecalc.html

Looking at todays weather it looks like the dew point was about 35 degrees F. Which would mean with 72 degree temp and 35 degree dew point the vapor pressure should have been about .2 which is more in line with what I would expect... only way i could get a .04 vapor pressure was set the dew point to 0 degree... hmmm...

This is the Temperature as of 8 PM;
Current conditions (as of 8:00 PM)Today's forecast°F | °C
Clear1°CFeels like: 1°C
Barometer: 1032.2 mb Dewpoint: -2°Humidity: 80%Visibility: 14 kmPrecip in last hr: NAPrecip last 24 hrs: NAWind: 0 km/hSunrise: 6:47 AMSunset: 4:28 PMUV Index: 0 Low
What can I say..I'll pay more attention next time

Just took another look in F:
Current conditions (as of 9:00 PM)Today's forecast°F | °C
Clear28°FFeels like: 28°F
Barometer: 30.5 in Dewpoint: 27°Humidity: 93%Visibility: 9 milesPrecip in last hr: NAPrecip last 24 hrs: NAWind: 0 mphSunrise: 6:47 AMSunset: 4:28 PMUV Index: 0 Low
RickRay is offline   Reply With Quote