Tornadoes are sometimes located at the heart of a hook-formed echo on the southwest aspect of thunderstorms. The hook is finest noticed within the reflectivity area. This image shows a reflectivity field containing several hook echoes related to thunderstorms that occurred in Tennessee and Kentucky on May 18, 1995. Normally, it is troublesome to differentiate precipitation type on the basis of the radar reflectivity alone.

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The tighter the packing, the stronger the winds are. The 500 mb heights are often referred to as the sterring winds of the atmosphere. Following a selected shade will show where the winds and thus pressure methods (cyclones and anticyclones) will transfer.

The forefront of an advancing warmer air mass, the passage of which generally brings cloud and precipitation adopted by increasing temperature and/or humidity. The leading edge of an advancing colder air mass. Its passage is normally marked by cloud and precipitation, followed by a drop in temperature and/or humidity. This image reveals the completely different scales on which snow can happen. The large snow band extending throughout the determine is related to a big storm system transferring throughout the nation.

This picture reveals the reflectivity field from the attention wall of Hurricane Andrew. The symmetry shown in this picture indicates that Andrew was a really properly developed hurricane. The ring of orange are the high reflectivities associated with the convection found in the eye wall.

If the flow is from north to south, the climate shall be genreally collder than regular. If the flow is from south to north, the weather shall be hotter than normal. Contours of equal mean sea-degree stress (MSLP), measured in hectopascals (hPa). MSLP maxima (anticyclones) and minima (depressions) are marked by the letters H (High) and L (Low) on weather charts.