Severe Thunderstorms and Heavy Rain in the Southern U.S.; Snow in the Northern Rockies and Northern Plains

A storm system will shift from eastern Texas into the lower Mississippi Valley today with additional threats of severe thunderstorms and heavy to excessive rainfall which may bring flooding. In the northern U.S., a storm will bring heavy snow and gusty winds over parts of the northern Rockies, northern Plains, and Upper Midwest today into Wednesday. Read More >

The Weather Calculator

by Tim Brice and Todd Hall

A portable version of the Weather Calculator is now available

Temperature Conversions:
Temperature Unit Conversion	Formulas
Heat Index	Formula
Wind Chill	Formulas
Cricket Chirps (Just for fun)	Formula
Moisture Conversions
Dewpoint and Wet-bulb from Relative Humidity	Formulas
Relative Humidity and Wet-bulb from Dewpoint	Formulas
Relative Humidity and Dewpoint from Wet-bulb	Formulas
Vapor Pressure	Formulas
Mixing Ratio	Formulas
Virtual Temperature	Formulas
Pressure Conversions
Pressure Unit Conversion	Formulas
Station Pressure	Formulas
Altimeter Setting	Formulas
Pressure Altitude	Formulas
Density Altitude	Formulas
Wind Conversions
Wind Speed Unit Conversion	Formulas
Misc
Speed of Sound	Formulas
Weather Term Calculator (Just for fun)
Showalter Index	Formulas
Flood Return Period