There are several scientific theories on why this area saw double digits of rain in a four day stretch, one being the orographic effect. The orographic effect occurs when air masses are forced to ...

Orographic features—such as mountains and valleys—add another layer of complexity. These geographical characteristics can enhance rainfall through orographic lifting, leading to greater runoff ...

The Regional Meteorological Centre (RMC) has predicted heavy rains in Nilgiris, Ghat areas of Coimbatore and southern districts of Tamil Nadu including Theni, Tenkasi, Kanniyakumari, and Tirunelveli.

Orographic lifting, a process that occurs when hills or mountains force air to rise and cool, caused water vapor to condense and additional precipitation to form as it combined with Helene's ...

But that is how it is with showers, hit and miss. Plus with incoming storms rainfall is orographic in nature. As onshore winds reach our foothills, the air rises and cools and precipitation increases.

Precipitation amounts are forecast to be less than a tenth of an inch each day, the National Weather Service said. Orographic enhancement in action! Persistent southerly winds since Sunday have ...