National Weather Service United States Department of Commerce

Monsoonal Moisture Persists Across the Southwest; Heat Remains for the South and West Coast

Persistent monsoonal moisture will affect portions of the four corners region that might generate isolated flooding, especially near burn scars. Heat persists across the South, including the middle and lower Mississippi River Valley, while temperatures also climb for much of the west coast. Read More >

Heat Advisory is in effect for the San Joaquin Valley, West Side Hills, Sierra Nevada foothills and the Lake Isabella area from 12 PM PDT Today until 9 PM PDT Monday evening. Heat sensitive people and those who are new to the area will be most prone to heat illness. Dehydration and prolonged exposure or strenuous physical activity outdoors during the hottest time of day could lead to heat exhaustion and/or heat stroke. If you have to be outside during the afternoon, wear sunscreen, drink plenty of water, and wear light colored, loose fitting clothing.
A few strong thunderstorms are possible in the Sierra Nevada from Sequoia National Park northward this afternoon. Dangerous cloud to ground lightning strikes, wind gusts near 45 mph, and small hail are hazards associated with strong thunderstorms.
Hot temperatures expected across most of Central California this weekend, so remember to practice heat safety. Limit outdoor activities and drink plenty of water.
Widespread triple digit heat is expected in the San Joaquin Valley this afternoon, Sunday afternoon, and Monday afternoon. A Heat Advisory is in place for the San Joaquin Valley (and adjacent foothills) during the mentioned time frame.


Text Product Selector (Selected product opens in current window)

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.


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.



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.


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)





Temp (F)



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: