In fact, you can have a very nice weather in a high pressure zone, with clear sunny sky and little wind, but during daytime, the pressure drops a little to climb up again during the night. That is a normal diurnal variation of pressure; when it is hot, air rises and pressure drops a bit. It is not the drop in itself but the rate of fall that is the most important point and that's why some people have barographs that register the pressure over time. An old seafarer's rule is that a pressure fall of ten millibars (today, called hecto-Pascal) in eight hours is a certain sign of a gale force wind coming in. And that is the only thing that is 100 percent certain in meteorology; a pressure fall must be followed by a wind of air trying to fill again the lower pressure.
Overview. 1  Babies can develop enlarged kidneys -- a condition known as hydronephrosis -- while still in the womb, or after birth. This condition is the most frequently discovered problem revealed by ultrasound examinations of babies in the womb.
Other bacteria can also cause it, including: Streptococcus pneumonia; Hemophilic influenza; Moraxella catarrhalis; Most cases of bacterial tracheitis develop after a common cold or flu. Following an URI, bacteria can more easily invade your childâs trachea. This can cause infection, inflammation, and rapid swelling. Because of the small size and position of your childâs trachea, even mild swelling can quickly block their airway. Although bacterial tracheitis can also affect adults, it tends to develop more slowly in them.