Precipitating clouds in and behind two occluded fronts and a cold front were convective clouds. Precipitating clouds in the centre of a cyclone were also convective, while precipitating clouds behind the cyclone were stratiform. Some clouds contained no liquid water, but others contained a substantial...
Cold fronts moving across the land sometimes collide with warm fronts that usually produce thunderstorms. The cold air mass is heavier and denser than the warm air in a warm front. The cold air pushes its way beneath the warm air forcing it to rapidly rise as the cold air pushes through a...
Cloud cover will increase with the approach of a mid-latitude cyclone and associated fronts. Cloud cover in this situation increases from top-down. Cirrus clouds are the first to be seen, followed by altocumulus/ altostratus, and finally followed by the rain producing clouds of nimbostratus and ...
In this study, we determined the CVS of the three SCEC cases occurring in the mei-yu fronts over central-eastern China on the basis of the conjunction of the S-band Doppler weather radar, the C-band Frequency Modulation Continuous Wave (C-FMCW) radar, and the Microrain Radar (MRR). Ba...
Altocumulus are often spotted on warm and humid mornings, especially during summer. They can signal thunderstorms to come later in the day. You may also see them out ahead ofcold fronts, in which case they signal the onset of cooler temperatures. ...
Air is also forced to rise at a weather front. This is due to the differing air masses of the two weather fronts. At cold fronts, cold air is pushed under warm air, forcing it upward and at a warm front, warm moist air is forced up and over the cold air. This process is called...
Advancing cold fronts have also triggered roll clouds, on occasion. The National Weather Service in Lubbock, Texas, documented a spectacular case of cold-frontal roll clouds in late September 2007. We always love your spectacular weather photos. Upload them to us at weather.com/photos, or share...
Explain why squall line thunderstorms often form ahead of advancing cold fronts but seldom behind them. Why does it rain? Why are mandrills called mandrills? Why is Salton Sea called a sea? Why does vapor pressure increase with temperature?Explore...
With Lynn McMurdie, Robert A. Houze Explore book a Ordinary thunderstorms The term airmass thunderstorm or simply ordinary thunderstorm is used to describe small isolated cumulonimbus clouds (Fig. 8.47) produced by local convection in an unstable airmass rather than by fronts or instability lines....
5. Local shallow to deep convection transition preceded by nocturnal/early morning precipitation events From 8:00 to 9:30 a.m., there is rain rate > 0.015 mm/hr from preexisting convections, however no cold-pool gust fronts detected 55 6. Propagating deep convection; coastal or basinal mes...