Areas of Excessive Rainfall and Dangerous Heat

Heavy to severe thunderstorms may bring areas of excessive rainfall and flooding over parts of the southern Plains through Friday. Hot to dangerously hot temperatures are forecast again across portions of the Pacific Northwest and southern Great Basin Tuesday. Read More >

Meteorological Calculator
(Thanks to Ron Murphy, NWS Binghampton, NY and Bryan Ruby, NWS Sioux Falls, SD for writing some of these scripts.)

Temperature Conversion
Enter a number then click on the appropriate number to see the result.
Fahrenheit (^oF)
Celsius (^oC)

Windchill Calculation
Enter in the air temperature (T_air) in degrees Fahrenheit and wind speed in mph, then click on the Calculate WC to compute the windchill (WC). (Note: Wind Chill Temperature is only defined for temperatures at or below 50 degrees F and wind speeds above 3 mph.)
T_air	Wind (mph)	New Wind Chill Index	Old Wind Chill Index
More information about the windchill equation.

Relative Humidity Calculation
Enter in the air temperature (T_air) and dew point temperature (T_dp) in degrees Fahrenheit (^oF) then click on the Calculate RH to compute the relative humidity (RH).
T_air		T_dp

Heat Index Calculation
Enter in the air temperature (T_air) in degrees Fahrenheit and relative humidity (RH) in percent (without the % sign), then click on the Calculate HI to compute the heat index (HI).
T_air	RH	T_dp=
OR
T_air	T_dp	RH=
More information about the heat index equation.

Wind Speed Conversion
Enter a wind speed in the box below...then select "convert".
	Answers:
mph	mph
knots	knots
m/s	m/s
ft/s	ft/s
km/h	km/h

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