National Weather Service United States Department of Commerce

San Joaquin Valley, CA

Weather Forecast Office

Meteorological Calculator

Weather.gov > San Joaquin Valley, CA > Meteorological Calculator

Snow
Thunderstorms
Record Cool Sunday
A Winter weather advisory is in effect for the Southern Sierra Nevada above 6,000 feet from 5 AM PDT Sunday morning until 5 AM PDT early Monday morning. Snow levels will fall to as low as 5,500 feet Sunday night. The majority of this snow will fall Sunday afternoon. Gusty winds are possible on exposed ridgetops and near the crest. Motorists should anticipate travel difficulties, delays and slick, hazardous road conditions, as well as the potential for road closures above 6,000 feet. If you plan to travel, consider alternate strategies. If you must travel, remember to carry tire chains, plenty of food, a good deal of water, and warm clothing in your vehicle. For information on road conditions, including closures or delays, call Caltrans at 1-800-427-7623 or visit http://www.dot.ca.gov/cgi-bin/roads.cgi.
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High temperatures Sunday afternoon will be 20 to 25 degrees cooler than today. Daily records for coolest maximum temperatures ever measured in Fresno and Bakersfield on May 26th will be set Sunday afternoon. Temperature records at Fresno date back to 1888. Temperature records at Bakersfield date back to 1893.
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National Weather Service Hanford, CA
Meteorological Calculator
Thanks to Ron Murphy, NWS Birmingham, AL for writing the JavaScript.

Temperature Conversion
Enter a number then click on the the conversion button.
Fahrenheit
(o F)

Celsius
(o C)

Wind Speed Calculations
Enter a speed into any blank to convert to all other wind speeds.

 mph    knots       m/sec      km/hr  

Wind Chill Calculation
Enter the temperature in degrees Fahrenheit and wind speed in mph, then click on the Calculate WC to compute the windchill index.
Temp
(o F)

Wind
(mph)

Index 

Relative Humidity Calculation
Enter the air temperature and the dew point in degrees Fahrenheit, then click on the Calculate RH to compute the relative humidity.
Temp
(o 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 (o F)

RH

HI 

Tdp

OR
Temp (o F)

Tdp

HI  RH 

Station Pressure Calculation
What is the current altimeter (inches)?
What is the station elevation? (feet)
i.e. Fresno Air Terminal = 333
The Station Pressure in inches is:
The Station Pressure in millibars is:
The Pressure Altitude in feet is:
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