A Red Alert indicates heavy to extremely heavy rains of over 20 cm in 24 hours, while an Orange Alert means very heavy rains from 6 cm to 20 cm of rain.
Biparjoy is expected to make landfall near the Jakhau coast, Gujarat on the evening of June 15 and will traverse all along the Rann of Kutch up to Rajasthan.
IMD in its weather update earlier had predicted light to moderate intensity rain accompanied with thunderstorms in the national capital and its adjoining areas.
The city, which usually sees only one rainy day in January, saw 7 this time around. Rains also broke a 101-year record, falling 300% above normal.
Over the next six days, the maximum temperature is likely to hover around 31 degrees Celsius and the minimum will drop to 15 degrees celsius.
On the same date, the northeast monsoon is likely to commence over southeast peninsular India which brings in rains mostly to Tamil Nadu, parts of Andhra Pradesh, and Kerala.
Heavy rainfall is very likely to occur at one or two places over the districts of Jharsuguda, Sundargarh, Bargarh, Deogarh, Sambalpur on September 20.
According to the disaster management department, the associated cyclonic circulation extends up to mid-tropospheric level and is tilting southwards with height.
The flood forecast of the type shown in first scenario is known as “Deterministic forecast” whereas that of second scenario is known as “Ensemble or probabilistic forecast”.
