Heat, moisture, wind shear came together to brew deadly UP storm

What hit UP this week, killing at least 111 people across 25 districts, was not a single storm but a collision of weather systems

What hit Uttar Pradesh this week, killing at least 111 people across 25 districts, was not a single storm but a collision of weather systems that should not ordinarily be in the same place at the same time. A typically winter system from the west that should already have retreated for the season met moisture pulled inland from the seas on either side of the subcontinent, over a land surface baked by weeks of intense summer heating. The combination, with

The immediate trigger, as IMD director general M Mohapatra noted on Thursday, was a passing western disturbance compounded by an unusually strong moisture incursion from the Bay of Bengal (PTI)