Description:
The Global Infrared Satellite image shows clouds by their temperature. Red and blue areas indicate cold (high) cloud tops. Infrared (IR) radiation is electromagnetic radiation whose wavelength is longer than that of visible light, but shorter than that of terahertz radiation and microwaves. Weather satellites equipped with scanning radiometers produce thermal or infrared images which can then enable a trained analyst to determine cloud heights and types, to calculate land and surface water temperatures, and to locate ocean surface features.
Description:
WSI's Worldwide Continental Map depicting color contour isotherms, or lines of equal temperature in degrees Celsius. Major metropolitan cities also depicted along with prevailing weather icon. Data are updated hourly to indicate current conditions in Universal Time Code/UTC
Description:
The Hurricane Caribbean Satellite image shows clouds by their temperature over the Caribbean Sea. Red and blue areas indicate cold (high) cloud tops.
Description:
The Global Observed Rainfall image shows 24 hour precipitation totals for around the world. Rainfall is typically measured using a rain gauge. It is expressed as the depth of water that collects on a flat surface, and is routinely measured with an accuracy up to 0.1 mm or 0.01 in. Rain gauges are usually placed at a uniform height above the ground, which may vary depending on the country. There are two types of gauges. Storage rain gauges are used to make daily or monthly measurements. Recording rain gauges measure the intensity of rainfall using a tipping bucket which will only tip when a certain volume of water is in it. An electrical switch can be used to record the t
Description:
The Global Current Wind image shows current wind in kilometers per hour around the world, color contoured every 5 knots. Actual winds are given at selected cities. Wind direction is determined by the direction from which it originates. For example, a northerly wind blows from the north to the south. Wind is the flow of air that occurs as it is heated by the sun and thus rises. Cool air then occupies the area from which the hot air has moved, creating what could loosely be termed a convection current. Winds are commonly classified by their spatial scale, their speed, the types of forces that cause them, the geographic regions in which they occur, or their effect.
Description:
The Global Relative Humidity image shows where moist and dry conditions exist around the world with actual relative humidity values at selected cities. Relative humidity is an important metric used in forecasting weather. Humidity indicates the likelihood of precipitation, dew, or fog. High humidity makes people feel hotter outside in the summer because it reduces the effectiveness of sweating to cool the body by preventing the evaporation of perspiration from the skin. This effect is calculated in a heat index table. Warm water vapor has more thermal energy than cool water vapor and therefore more of it evaporates into warm air than into cold air.
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The Hurricane Atlantic Analysis image show the current surface features (highs/lows/fronts/tropical cyclones) in the Atlantic Ocean.
Description:
The Hurricane Pacific Satellite image shows clouds by their temperature over the Pacific Ocean. Red and blue areas indicate cold (high) cloud tops.
