Nor'Easter Continues to Bring Heavy Rain and Coastal Impacts; Nolo Continues to Impact Hawaii

The nor’easter will weaken tonight, easing beach conditions and coastal flooding, though locally heavy rain will continue in parts of the Mid-Atlantic and New England into Monday. Hurricane Nolo continues to bring strong winds and large waves to Hawaii. A multi-day rain event will return to the Four Corners region Monday and expand to the south-central U.S. by midweek. 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