National Weather Service United States Department of Commerce

Winter Storm Warning has been issued from 10 AM today until 4 am Friday from Yosemite National Park to Tulare County above 6000 feet.. Total snow accumulations of 5-10 inches are likely with local amounts around 12 inches possible. The heaviest amounts will be in the highest elevations. Wintry conditions will occur over the higher elevations of the Sierra through Saturday morning with slick, snow-covered roads, possible chain restrictions and potential travel delays. Hikers and campers in the back country should be prepared for a change to colder weather, blustery winds and snow.

 

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National Weather Service Hanford, CA
Meteorological Calculator
Thanks to Ron Murphy, NWS Birmingham, AL for writing the JavaScript.

Temperature Conversion

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Fahrenheit
(F)

Celsius
(C)

Wind Speed Calculations

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 mph    knots       m/sec      km/hr  

Wind Chill Calculation

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(F)

Wind
(mph)

Index 

Relative Humidity Calculation

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(F)

Dew
Point

Heat Index Calculations

Enter the temperature in degrees Fahrenheit and relative humidity (RH) in percent (without the % sign), or the Dew Point (Tdp).  Then click on the Calculate HI to compute the heat index (HI).
Temp (F)

RH

HI 

Tdp

OR

Temp (F)

Tdp

HI  RH 

Station Pressure Calculation

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i.e. Fresno Air Terminal = 333
The Station Pressure in inches is:
The Station Pressure in millibars is:
The Pressure Altitude in feet is: