•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe™

Sitemap

RF Cafe Software

RF Cascade Worbook
 RF Cascade Workbook 2005 - RF Cafe
Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
RF & EE Symbols Word
RF Stencils for Visio

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger
BSEE
KB3UON
EIEIO

Carpe Diem!
(Seize the Day!)

5th MOB:
My USAF radar shop

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse riding website

Heat Index Chart - Relative Humidity vs. Air Temperature
As one who is severely discomforted by a combination of heat and humidity, this kind of table is of great interest. If I am going to be miserable, I want to know exactly how miserable I really am! This information is derived from NOAA Click here for a windchill chart.




Extreme Danger - Heat stroke or sun stroke likely
Danger - Sunstroke, muscle cramps and/or heat exhaustion likely
Extreme Caution - Sunstroke, muscle cramps and/or heat exhaustion possible
Caution - Fatigue possible




NOAA provides the following equation for calculating heat index:
       HI = -42.379 + 2.04901523T + 10.14333127R - 0.22475541TR - 6.83783x10-3T2
              
- 5.481717x10-2R2 + 1.22874x10-3T2R + 8.5282x10-4TR2 - 1.99x10-6T2R2,

           where T = ambient dry bulb temperature (°F) R = relative humidity (integer percentage)

      "Because this equation is obtained by multiple regression analysis, (HI) has an error of ±1.3°F"
 

Air
Temp
(°F)
Relative Humidity (%)
  40 45 50 55 60 65 70 75 80 85 90 95 100
110 136                        
108 130 137                      
106 124 130 137                    
104 119 124 131 137                  
102 114 119 124 130 137                
100 109 114 118 124 129 136              
98 105 109 113 117 123 128 134            
96 101 104 108 112 116 121 126 132          
94 97 100 102 106 110 114 119 124 129 136      
92 94 96 99 101 105 108 112 116 121 126 131    
90 91 93 95 97 100 103 106 109 113 117 122 127 132
88 88 89 91 93 95 98 100 103 106 110 113 117 121
86 85 87 88 89 91 93 95 97 100 102 105 108 112
84 83 84 85 86 88 89 90 92 94 96 98 100 103
82 81 82 83 84 84 85 86 88 89 90 91 93 95
80 80 80 81 81 82 82 83 84 84 85 86 86 87

Try Using SEARCH to Find What You Need.  >10,000 Pages Indexed on RF Cafe !

Copyright 1996 - 2016
Webmaster:  Kirt Blattenberger, BSEE - KB3UON
Family Websites:  Airplanes and Rockets | Equine Kingdom

All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.