KERALA & MAHE AND LAKSHADWEEP

FRIDAY, 12 SEPTEMBER 2025 | 21 BHADRA 1947(SAKA)

SYNOPTIC SITUATION: Under the influence of the upper air cyclonic circulation over west central & adjoining northwest Bay
of Bengal off north Andhra Pradesh and south Odisha coast a low pressure area has formed over the same region at 0830 hrs IST
of today, the 12th September, 2025.The associated upper air cyclonic circulation extended up to 5.8 km above mean sea level tilting
southward with height. It is likely to move west-northwestwards across south Odisha and adjoining north Andhra Pradesh and
south Chhattisgarh during next 2 days. A trough runs from upper air cyclonic circulation associated with low pressure area over
west central & adjoining northwest Bay of Bengal off north Andhra Pradesh and south Odisha coast to south Maharashtra across
Chhattisgarh, Vidarbha between 3.1 & 5.8 km above mean sea level.

SUMMARY: Southwest monsoon has been weak over Kerala. Rain occurred at a few places in Lakshadweep and at one or two
places in Kerala. The chief amounts of rainfall reports in cm are: Vattavada AWS (Idukki district) 3, Cheruthoni AWS (Idukki
district) 1. (Graphics enclosed in Annexure I)

WEATHER FORECAST FOR NEXT SEVEN DAYS: (Graphics enclosed in Annexure II)
DAY 1 (12-September-2025): Rain or thundershower is most likely to occur at a few places in Lakshadweep and at one or two
places in Kerala.
DAY 2 (13-September-2025): Rain or thundershower is most likely to occur at a few places in Lakshadweep and at one or two
places in Kerala.
DAY 3 (14-September-2025): Rain or thundershower is most likely to occur at a few places in Kerala and Lakshadweep.
DAY 4 (15-September-2025): Rain or thundershower is most likely to occur at a few places in Kerala and Lakshadweep.
DAY 5 (16-September-2025): Rain or thundershower is most likely to occur at a few places in Kerala and Lakshadweep.
DAY 6 (17-September-2025): Rain or thundershower is most likely to occur at a few places in Kerala and Lakshadweep.
DAY 7 (18-September-2025): Rain or thundershower is most likely to occur at a few places in Lakshadweep and at one or two
places in Kerala.

FORECAST FOR THIRUVANANTHAPURAM CITY AND NEIGHBOURHOOD VALID UNTIL THE MORNING OF 13-
September-2025: Partly cloudy sky with possibility of rain or thundershowers.

WEATHER WARNING FOR NEXT 7 DAYS:

DAY 1 (12-September-2025): Nil.
DAY 2 (13-September-2025): Nil.
DAY 3 (14-September-2025): Nil.
DAY 4 (15-September-2025): Nil.
DAY 5 (16-September-2025): Nil.
DAY 6 (17-September-2025): Nil.
DAY 7 (18-September-2025): Nil.

THUNDERSTORM WARNING: Nil.

HEAVY RAINFALL WARNING: Nil.

WIND WARNING FOR FISHERMEN (Graphics enclosed in Annexure III):

AREA WARNING MESSAGE

Kerala coast NIL
Lakshadweep area NIL
Karnataka coast NIL

Forecast and Warning for any day is valid from 0830 hours IST of that day till 0830 hours IST of the next day.
 FOR OTHER COASTS AND OPEN SEA

Squally wind with speed reaching 45 kmph to 55 kmph gusting to 65 kmph is likely to prevail over some parts of
Southwest & Westcentral Arabian Sea.
Day 1
(12.09.2025) Squally weather with wind speed reaching 40 - 50 kmph gusting to 60 kmph likely to prevail along and off South
Tamilnadu coast, over Gulf of Mannar and adjoining Comorin area,along & off south Odisha, Andhra Pradesh coasts,
Westcentral adjoining Northwest Bay of Bengal, over some parts of Southwest Bay of Bengal.

Squally wind with speed reaching 45 kmph to 55 kmph gusting to 65 kmph is likely to prevail over some parts of
Southwest & Westcentral Arabian Sea.
Day 2
(13.09.2025) Squally weather with wind speed reaching 40 - 50 kmph gusting to 60 kmph likely to prevail along and off Tamilnadu
coast, over Gulf of Mannar and adjoining Comorin area, along & off Andhra Pradesh Coast, Westcentral & adjoining
Northwest Bay of Bengal, over some parts of Southwest Bay of Bengal.

Squally wind with speed reaching 45 kmph to 55 kmph gusting to 65 kmph is likely to prevail over some parts of
Southwest & Westcentral Arabian Sea.
Day 3
Squally weather with wind speed reaching 40 - 50 kmph gusting to 60 kmph likely to prevail over along & off Konkan &
(14.09.2025) &
Day 4 Goa coasts, over some parts of Southwest Bay of Bengal.
(15.09.2025)
Squally weather with wind speed reaching 40 – 50 kmph gusting to 60 kmph likely to prevail along and off South
Tamilnadu coast, over Gulf of Mannar and adjoining Comorin area.

Squally wind with speed reaching 45 kmph to 55 kmph gusting to 65 kmph is likely to prevail over some parts of
Southwest & Westcentral Arabian Sea.
Day 5
(16.09.2025) Squally weather with wind speed reaching 40 - 50 kmph gusting to 60 kmph likely to prevail along and off South
Tamilnadu coast, over Gulf of Mannar and adjoining Comorin area and over few parts of southwest Bay of Bengal.

Fishermen are advised not to venture into the above sea areas during the above mentioned period.

OCEAN CURRENT ALERT/SWELL SURGE ALERT/HIGH WAVE ALERT BY INCOIS: NIL

THIRUVANANTHAPURAM OBSERVATIONS RECORDED AT 0830 HOURS IST OF

FRIDAY, 12 SEPTEMBER 2025 | 21 BHADRA 1947(SAKA)

TEMPERATURE TRV TRV TRV TRV RAINFALL (IN TRV TRV

HUMIDITY (%)
(°C) AP CITY A.P CITY MM) A.P CITY

Max. Past 24 hrs. 31 34 At 0830 hrs. IST 72 84 Past 24 hrs. 0 0

Departure from Departure from

1 3 -11 -2
normal normal

At 1730 IST of
Min. past 24 hrs. 25 25 78 73 Since 01-06-2025 565 629
11-09-2025

Departure from
1 1
normal

Departure from Departure from

At 0830 hrs IST 29 27 -2 -5 -131 -90
normal normal

AWS: Automatic Weather Station; $ ARG: Automatic Rain Gauge; # Forecast and warning for any day is valid from 0830 hours IST of day till 0830 hours IST of next day. Temperature departures: Markedly below normal - 5.1°C or
less. Appreciably below normal - 3.1°C to -5.0°C. Below normal - 1.6°C to -3.0°C. Normal - 1.5°C to +1.5°C Above normal 1.6°C to 3.0°C. Appreciably above normal 3.1°C to 5.0°C. Markedly above normal 5.1°C or more. 24 hrs
temperature changes: Marked fall - 4.1°C or less. Appreciably fall - 2.1°C to - 4.0°C. No Large change -2.0° C to + 2.0° C. Appreciable rise 2.1°C to 4.0°C. Marked rise 4.1°C or more.

Forecast and Warning for any day is valid from 0830 hours IST of that day till 0830 hours IST of the next day.
 Annexure I

Annexure II

Forecast and Warning for any day is valid from 0830 hours IST of that day till 0830 hours IST of the next day.
 Annexure III

नीता के गोपाल Neetha K Gopal

वैज्ञाननक- एफ Scientist-F

प्रमख
ु Head

Web: www.mausam.imd.gov.in/thiruvananthapuram Email: mc.trv@imd.gov.in, mctrivandrum@gmail.com

Ph: 2322894/2322330/2330025 Fax: 2322894

Forecast and Warning for any day is valid from 0830 hours IST of that day till 0830 hours IST of the next day.