Critical Fire Weather in the West; Monitoring Tropical Storm Erin

Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin, interior Northwest, and Rockies Thursday. Red Flag Warnings have been issued. While there is still uncertainty in what impacts might occur to the U.S. east coast next week, the risk of dangerous surf and rip currents across the western Atlantic basin is increasing. 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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