31st December...
Continuing from yesterday's post,
Year end bonus for Chennai... Mean total rainfall for Chennai in Dec is just 177.4 mm.. And ⇓
Massive Rainfall in Chennai & the suburbs. Rainfall ending 8:30 am on 31.12.2021
------------------------------------------------------------------------------------------in mm (min 60 mm)
DGP office - 237
Avadi - 230
MRC Nagar - 215
Nungambakkam - 201
Poonamallee - 201
KK Nagar - 197
Ambattur - 196
Anna University - 190
Tondairpet - 190
Chembarabakkam - 189
ACS Medical College (Vanagaram) - 185
Nandanam - 184
Aynavaram - 177
Alwarpet - 173
Perambur - 155
Meenambakkam - 149
Kottivakkam - 145
Valsarawakkam - 143
Shollingnallur - 124
Adyar - 120
Korattur Anaicut - 118
Mogappair East - 110
Tirur (Sevvapet)- 109
Redhills - 103
Poondi - 97
Kelampakkam - 94
Anna Nagar West - 93
Pallikaranai - 90
Cholavaram - 90
Tamaraipakkam - 90
Anna Nagar - 87
Sriperumbedur - 86
Tamabaram - 69
Sathyabama University - 64
Hindustan University - 63
Katupakkam (near Vandalur) - 62
Tiruvallur - 56
Reasons Analysis by Vagarian T.Gokul (Pune) :
Leading edge of a moisture filled easterly surge approached Tamilnadu coast with winds decreasing around the edge.... probably leading to moisture convergence in the lower levels and at the same time the divergence associated with the upper level trough (east of trough axis ) probably aided in dynamic lifting by providing upper level ventilation to the column....and along with some frictional convergence as it neared the coast .... Broad understanding...
Upper level divergence was seen to the east of trough axis
Information and post courtesy to Vagarian T.. Gokul.
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