Severe Weather in the Plains; Heavy Rainfall in the Northern Plains, Tennessee Valley and Southeast

Severe Weather in the Plains; Heavy Rainfall in the Northern Plains, Tennessee Valley and Southeast

Weather Calculator

Numerous severe thunderstorms with a potential for 60-80 mph winds, along with tornadoes (some strong), and large to very large hail are expected across the northern and central Plains through tonight. Heavy to excessive rainfall may bring a flooding threat to parts of North Dakota and Minnesota, and from the Ohio Valley to the Southeast through tonight. Read More >

Temperature Conversion
Enter a number then click on the the conversion button.
Fahrenheit (^oF)
Celsius (^oC)

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 (^oF)		Dew Point

Heat Index Calculations
Enter the temperature in degrees Fahrenheit and relative humidity (RH) in percent (without the % sign), or the Dew Point (T_dp). Then click on the Calculate HI to compute the heat index (HI).
Temp (^oF)	RH	HI	T_dp
OR
Temp (^oF)	T_dp	HI	RH

SHV RSS Feed

Station Pressure Calculation
What is the current altimeter (inches)?
What is the station elevation? (feet) i.e. St. Louis - Lambert= 710

The Station Pressure in inches is:
The Station Pressure in millibars is:
The Pressure Altitude in feet is:

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
(^oF)

Wind
(mph)

Wind Chill Index