28 FEBRUARY 2003
2-18.104.22.168 0.4%, 1.0%, 2.0%, 97.5%, 99.0%, and 99.6% Dry Bulb Design Values.
Listed is the dry bulb temperature corresponding to a given annual cumulative
frequency of occurrence and its respective mean coincident values for wet bulb
temperature, humidity ratio, wind speed, and prevailing wind direction. The dry bulb
temperature listed represents the value that was exceeded for the respective percent of
time over the entire POR. For example, the 1.0% occurrence design value temperature
(92 F) has been exceeded only 1 percent of the time during the entire POR. All the
observations occurring within one degree of the design value are grouped, and the
Mean Coincident (Average) Values for W et Bulb Temperature, Humidity Ratio, and
W ind Speed are calculated. The prevailing wind direction (the "mode" of the wind
direction distribution) is also calculated.
2-22.214.171.124 Mean Daily Range. The mean daily range (difference between daily
maximum and daily minimum temperatures) is the average of all daily dry bulb
temperature ranges for the POR.
Wet Bulb Temperature
Median of Extreme Highs. The Median of Extreme Highs value for wet
bulb temperature is the highest annual extreme wet bulb temperature averaged over
the POR. The corresponding Mean Coincident (Average) Values are determined the
same way as for the respective values for dry bulb temperature.
0.4%, 1.0 %, 2.0% Wet Bulb Temperature Design Values. The design
values listed and the corresponding Mean Coincident (Average) Values are determined
the same way as for dry bulb temperature, described in 2-126.96.36.199.
Median of Extreme Highs. The value for humidity ratio is the highest
annual extreme averaged over the POR. The corresponding Mean Coincident
(Average) Values are determined the same way as described in 2-188.8.131.52.
0.4%, 1.0%, and 2.0% Humidity Ratio Design Values. Design values are
provided for humidity ratio and the corresponding Mean Coincident (Average) Values
for dry bulb temperature, vapor pressure, wind speed, and wind prevailing direction.
Air Conditioning/Humid Area Criteria. These are the number of hours, on
average, that dry bulb temperatures of 34 C (93 F) and 27 C (80 F) and wet bulb
temperatures of 23 C (73 F) and 19 C (67 F) are equaled or exceeded during the
Other Site Data. This information is provided for general reference only,
and should not be used as the basis for design. There are some locations for which
this data is not available. In these cases, that portion of the table will be left blank.