Weather data from the unofficial station on the roof of the Eyring Science Center on the campus of Brigham Young University in Provo, Utah, USA.

Tue, May 13, 2008 4:19:09 PM
Current Values Past 24 hours
 Temperature   16.0oC    rising 1.57oC/hour  Maximum:   16.7oC   at 15:43:30, 5/13/2008 
 Minimum:   1.2oC   at 06:08:30, 5/13/2008 
 Mean1:   9.0oC 
 Average2:   7.8oC 
 Relative Humidity   24%    falling 4.3%/hour  Maximum:   67.5%   at 07:52:30, 5/13/2008 
 Minimum:   19.2%   at 18:01:30, 5/12/2008 
 Mean1:   43.4% 
 Average2:   40.6% 
 Dewpoint   -4.8oC    falling 1.08oC/hour  Maximum:   -2.4oC   at 14:31:30, 5/13/2008 
 Minimum:   -12.1oC   at 18:01:30, 5/12/2008 
 Mean1:   -7.2oC 
 Average2:   -5.5oC 
 Sea Level Pressure   101.3 kPa    rising 0.11 kPa/hour  Maximum:   101.3 kPa   at 12:10:30, 5/13/2008 
 Minimum:   100.5 kPa   at 16:18:30, 5/12/2008 
 Mean1:   100.9 kPa 
 Average2:   100.9 kPa 
 Station Pressure   85.1 kPa   Maximum:   85.1 kPa   at 12:54:30, 5/13/2008 
 Minimum:   84.2 kPa   at 20:56:30, 5/12/2008 
 Mean1:   84.7 kPa 
 Average2:   84.6 kPa 
 Wind Speed   0.6 m/s from SSW (198o)  Maximum:   10.2 m/s from N (359o)   at 16:48:30, 5/12/2008 
 Average2:   2.1 m/s 
 Wind Direction   Average3:   from NW (310o) 
 Solar Irradiance   871 W/m2    falling 412.9 (W/m2)/hour  Maximum:   1185.4 W/m2   at 14:01:30, 5/13/2008 
 Average2:   395.0 W/m2 
 Rainfall this month   19.05 mm 
 Rainfall since midnight   0.00 mm   Past 24 hours   0.00 mm 
 Maximum rate   0.000 mm/hour   at 16:19:00, 5/12/2008 
 Wind-Chill Temperature   16.0oC   Maximum:   16.5 oC   at 15:42:30, 5/13/2008 
 Minimum:   -0.5 oC   at 06:17:30, 5/13/2008 
 Mean1:   8.0 oC 
 Average2:   6.8 oC 
 Heat Index   16.0oC   Maximum:   16.9 oC   at 15:42:30, 5/13/2008 
 Minimum:   1.2 oC   at 06:08:30, 5/13/2008 
 Mean1:   9.1 oC 
 Average2:   7.9 oC 

1 The mean (in the weather industry this can be referred to as either the mean daily value or the average daily value) is actually known statistically as the midrange or midextreme value: (max(x)+min(x))/2.
2 The average given here is also known statistically as the arithmetic mean: Σxi/N where the sum is performed over the available data for the previous 24-hour period. Normally the available data is the 1-minute average (arithmetic mean of data taken once per second) for temperature, humidity, mean sea-level pressure, station pressure, solar irradiance, and dewpoint. For wind chill the 1-minute value is the minimum recorded over that period. For wind speed and heat index it is the maximum during the period.
3 The average wind direction is the vector average which incorporates both the direction and speed. It is the net direction a parcel of air would have moved if you could track it over the 1-minute period.

Click here for british units.

Return to BYU ESC Weather Home Page.

Contact Bryan Peterson with questions or comments about this page. ( 101142)

Copyright © 2008. Brigham Young University. All rights reserved.