Our adverse weather early warning work on What'sApp groups in the Darjeeling- SIkkim region: Thunderstorms of 11/12Apr2024 in Kalimpong

After the Teesta Valley GLOF of 04Oct2023, our region has been extraordinarily dry, with the erratic western disturbance activity in the winter months, robbing us of all our winter rain. In Kalimpong we had the first showers after Oct2023, between 19 & 27Mar2024 where we clocked 112.6mm. Thereafter, it has been dry with forest fires again starting in the Teesta Valley.
With regard to early warnings on adverse weather events and disbursement of information on landslides, road blocks etc, SaveTheHills has been running several very active and large What'sApp groups in the Darjeeling-Sikkim region called 'Hazard Alerts or HA' for many years now and the following cloud image on approaching adverse weather was posted in the group on 11Apr2024:

This image was posted on 'Hazard Alerts' WhatsApp group at 1.31pm on 11Apr2024 along with lightning warnings from the IMD 'Damini' (lightning warning) app. Shortly after this was done, the first storm hit our region at around 2.30pm. Wind speeds in gusts reached upto 58kmph.

This storm died down momentarily at around 4.30pm only to pick up again quickly. The following cloud image along with NOWCASTs from IMD were posted to members in the 'Hazard Alerts' What'sApp groups.

Warning posted at 5.36pm to our WhatsApp groups alerting them about another storm which was approaching.

Subsequent cloud images which show the progress of the storm from 6.45pm to 10.45pm on 11April2024

The thunderstorm which hit Kalimpong at 2.30pm on 11April2024, raged right thru the night and only ceased at around 8.00am on 12Apil2024. Surprisingly, we had only 2mm of rain however strong, gusty, westerly winds from Nepal along with lightning prevailed for more than 12hrs. The graphical analysis of the windspeed from our Davis Vantage Pro AWS is placed below:

Though there were no casualties or damage from the storm, what was unusual was its duration considering there was no major weather system (such as a depression/cyclone) near by.
Also what is possible today is to get reliable and accurate information of such weather events in advance and to disburse the same quickly to a large number of people. We have been doing this regularly in WhatsApp since Jun 2016.

Praful Rao
Kalimpong district
Darjeeling-Sikkim Himalaya

Mungpel: A village living on the edge (03Jan2021)

 As a part of our landslide surveys, I visited Mungpel, a small village in Pabringtar GP of Kalimpong (Block -1) on 03Jan2021. The village consists of 30 odd houses who are almost entirely of members of Limbu ethnic group. The sombre fact is that of these homes, approximately 10-15 overlook and are in the proximity of huge landslide.

We had carried out a landslide survey in this area in April 2011 and a map of the area from that survey is placed below:

Landslide history
As per locals, the landslide was insignificant until 2018 after which it has grown to its present size. This whole area receives very heavy rainfall and is thrashed by intense thunderstorms during the pre-monsoons but it is a pity there are no rainfall data from this place to relate the landslide activity.
However, the locals clearly said most of the damage was done during the monsoons of 2020 especially around end of Jun2020.
Coordinates of Mungpel Landslide:
N 26.95696° E088.54993°

At the base of the this hill there is a fairly big Durung khola (river) and a wonderful flat piece of land where the villagers do their agriculture and farming. As per the villagers the landslide was not due to toe erosion by the river and was caused by the inherent geology and heavy rain.
Yet another major landslide in the lower Sherwani area, nudges the Mungpel landslide and we have yet to survey that area.

As I have mentioned 3 families have already relocated to upper regions but some 10 other families also may suffer a similar fate - these monstrous landslides are seem impossible to control without serious study and funding.

Praful Rao
Kalimpong district
Darjeeling -Sikkim Himalaya