Cloud Burst / Causes / Precaution / Can we predict cloud burst/ Climate Change effects

 Cloud Burst:

An extreme rainfall volume in a particularly short period of time, that is typically accompanied by thunderstorms, is referred to as a cloudburst. It normally occurs when clouds exceed their capacity to sustain the water they have collected, and they become unable to maintain it, so they release the water at a single condensed point. A rainfall exceeding 100 mm (approximately 4 inches) in 1 hour over a small locality is called a cloud burst, while the average rainfall is 5 to 10 mm in 1 hour. Its timespan is quite short, and it lasts between minutes and several hours. They may bring flash floods, landslides, infrastructure damage, and damage to lives.  Mountainous regions, in particular the Himalayas (Pakistan, India, Nepal, Bhutan) and places of sudden upthrust of moist monsoon air are most prone. Simply put, it is as though the water tank of the sky that suddenly breaks loose over a small area.

Phenomenon:

The phenomenon of a cloudburst refers to a sudden, extremely heavy downpour of rain over a very small geographic area in a very short time. It occurs in a number of steps.

1.      Moisture Accumulation

The air with a large proportion of water particles gets heated through convection or forced through mountains (orographic lift) to elevate quickly.

2.      Cloud Saturation

The rising air cools rapidly, and moisture vapor becomes a thick cloud and holds an exceptionally great deal of water.

3.      Sudden Release

Unlike the gradual ejection of rain by the clouds, when the clouds become saturated all the moisture is expelled forcibly at once, like the bursting of a water tank in the sky.

 Causes of Cloudburst in Pakistan

The reasons behind the Cloudburst in Pakistan         

1.      Himalayan & Karakoram Mountains

The high northern lands of Pakistan (Gilgit-Baltistan, Khyber Pakhtunkhwa, Kashmir) are extremely tall mountains. As monsoon winds filled with water content carried in the Arabian Sea and the Bay of Bengal collide with these mountains, they are then pushed high into the air and cool off, causing heavy and abrupt rains.

2.      Monsoon System

Between July and September, monsoon winds come in full force to Pakistan. In cases where these winds stagnate in a certain valley or a part of the mountains, it leads to a cloud burst.

3.      Blocked Valleys

The clouds are trapped in the narrow valleys such as the Kaghan valley, Swat valley, Chitral valley, Hunza valley, Neelum valley. Because of the inability to dilute the rain, they spread it in single, intense rainfall.

4.      Climate Change

An escalation of temperatures in Pakistan increases the moisture in the air. Increased water vapor in the air, puts more danger of severe rainfall occurrences.

5.      Lacking Dams Capacity:

Our Dams are old, and their water retention has decreased from 15-30% due to siltation. Tarbela Dam has lost its 43% water storage capacity due to siltation. Mangla Dam has lost its 195 storage capacity over the years.

6.      Deforestation:

Forests can prevent flooding and landslides after an intense rainfall. On a national level, forest cover declined 18% from 1992 to 2025, falling from 3.78 million hectares to 3.09 million hectares. Countries should have a forest cover of ~25% (~199,000 km²), but it has ~5% (~38,000 km²), creating a massive ecological deficit that directly contributes to disasters of cloudbursts and floods.

Can we predict Cloudburst?

The cloudbursts are hard to forecast in advance since they are sudden and very localized. However, scientists combine tools in the following way:

1.         Radar & Satellites

Doppler weather radar is used to measure intense and small-scale rainfall activities. Satellites monitor the formation of clouds, moisture levels, and wind patterns.

2.         High Resolution Forecast Models

Contemporary models (such as WRF Weather Research & Forecasting- model) predict rain patterns on smaller scales (in timeframes that are a couple of hours ahead).

3.         Ground Observations

An indication is vivid, dark-colored, towering clouds (cumulonimbus clouds) over mountains. Excessively hot and very wet weather in anticipating a storm, may also show signs of possible cloudburst conditions.

4.         Warning Systems

The monsoon and flash flood warnings are given by the Pakistan Meteorological Department (PMD) in Pakistan but cloudbursts are still hard to accurately predict.

Precautions Against Cloudbursts:

They occur fast so the essential factor is preparedness:

1.         Early Warning & Awareness

Stay informed about PMD alerts and local announcements during the monsoons. Creation of awareness among communities surrounding mountain areas with indicators of cloudbursts.

2.         Safe Settlement Planning

In the north, no house should be constructed close to a riverbank or nullah or on a gradient. Enhance the infrastructure in the valleys that are vulnerable to floods.

3.         Emergency Preparedness

Have an evacuation plan and first-aid kits as well as drinking water and emergency supplies. Pre-determine high-ground shelters that will be safe.

4.         Travel Precautions

It is advisable to avoid travelling to the northern hilly landscapes during high warning periods of the monsoon. Tent never in or near the rivers or streams.

5.         Disaster Management

Enhance the valleys' drainage and the town's drainage. The government departments, such as NDMA/PDMA, ought to establish swift operational rescue 

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