can weather forecast change in 24 hours

Can weather forecast change in 24 hours?  Weather forecasting is tricky because of the ever-changing data from various sources.

Most people know that weather can shift on a day-to-day basis, but others often wonder how often weather forecast change.

And if it is truly possible for it to change within 24 hours?

Well, the truth is that the weather forecast can change in a day because the atmosphere we live in is not static. 

Can Weather Forecast Change in 24 Hours?

It most certainly can.

Around us is a mass of air laden with moisture and gases that are in constant motion as they react with the sun and each other in different layers of the atmosphere.

As air is heated by the sun it rises, forcing changes in air currents and pressure.

changes in weather forecast in 24 hours

The moisture content is vaporized until it reaches cooler altitudes and condenses out as rain.

This is a continuous cycle, happening planet-wide, but how we experience the weather personally depends on the conditions where we are. 

An Important Point to Understand

It means the weather is a local phenomenon.

The kind of weather experienced in a specific location depends on the conditions within the air column surrounding it.

Fact: Where the air pressure is low it will be cold, cloudy, and wet, and where it is high, the weather will be warm and dry.

How Various Changes Affect the Forecast

So, does weather forecast change? Yes, it does, and there are factors affecting it.

Over millennia, great minds have made the art of predicting the weather.

And with satellite technology, modern meteorologists save many lives as they observe and track weather systems in real-time.

satellite technology

Weather experts make informed predictions about the weather world-wide and at very specific locations based on:

  • How fast the air is moving and towards where
  • How warm and how wet the air is

All factors in weather formation are subject to variation as systems pull air in and churn up the atmosphere.

To stay accurate, forecasters monitor temperature and humidity, air pressure and movement. 

Examples of Weather Causing Sudden Changes in the Forecast

One small change in the direction of a low-pressure storm can make it cross a lake rather than stay over land.

This could cause the rain to fall earlier than expected and land somewhere else and lower the accuracy of the previous forecast.

The spike in humidity as the storm front crosses the lake could be sufficient to trigger a localized downpour where previously rain was not predicted at all.

Fact: A sudden drop in the temperature throughout the air column as it is forced higher when it meets a mountain, can produce snow in as little as twenty minutes.

The Frequency of Weather Forecast Changes

frequency of weather forecast changes

Conditions change so rapidly that weather forecasts are constantly updating.

This is because every form of weather has a knock-on effect on the weather systems all over the world.

Within this turbulence are pockets of warmer or cooler air with differing humidity levels, and each pocket reacts with the air around it.

Observing all this flux, with the help of computer modeling, meteorologists can reliably predict the day-to-day weather 2 or 3 days in advance.

However, it is becoming more difficult as global warming takes effect.

With each degree of warming, the window for accurate reporting is shortened by several hours.   

The Effect of Global Warming on the Accuracy of Weather Forecasting

A rise in global temperatures due to climate change is having multiple effects on the atmosphere, some of which make it harder to anticipate the weather. 

Weakening of the Jet Stream

weakening of the jet stream

The jet stream’s typical behavior may change as a result of global warming, which could have an impact on weather predictions. 

The jet stream is a fast-flowing circulation of air at high altitudes that has a significant impact on climate patterns all across the globe.

Forecasters may have a harder time predicting the route of storms and other weather phenomena due to the jet stream’s weakening and increased volatility. 

Changes in Rainfall Behavior

changes in rainfall behavior

Similarly, changes in precipitation patterns may also result from global warming.

When temperatures rise, more water evaporates from the oceans, lakes, and other water sources.

This in turn raises the atmospheric humidity and there may be stronger and more frequent downpours and longer droughts as a result.

These shifts in rainfall behavior can lead to inaccurate weather forecasts. 

Factors That Determine the Frequency of Forecast Updates

Predicting the weather is a game played with ever changing variables, including:

  • Temperature
  • Air pressure
  • Wind speed
  • Wind direction
  • Cloud cover
  • Humidity
  • The time of the year
factors determining the frequency of forecast updates

Even the slightest change in anyone can throw a prediction off despite meteorologists being more accurate with their forecasting than they have ever been.

The earth is not warming at a uniform rate so with climate change comes weather chaos which places a limit on accurate forecasting regardless of its frequency.

Fact: An accurate long term forecast of some 10 to 15 days may soon be impossible because of increasing global warming. 

How Short-term and Long-term Forecasts are Updated Differently

A short-term forecast covers just a few hours, the extended range a few weeks but a long-term forecast makes weather predictions months and even years ahead.

Each type of forecast takes similar factors into account, and can be modeled the same way.

short and long-term forecasts are updated differently

But for effective forecasting on the global long-term scale, scientists prefer to use more predictable boundary conditions in their long term forecast modeling.

Boundary conditions include the percentage of sea ice and the sea temperature.

It also considers how these are likely to react with the atmosphere to affect the weather months or years in the future. 

An Important Point to Remember

Even so, there is still uncertainty, which is impossible to avoid.

So not only are these forecasts constantly monitored and updated, they are constructed using an ensemble method.

This process knits together many computer simulations, each with different variables in efforts to offset the uncertainty, although weather outcomes are still referred to as possibilities.  

The Potential Impacts of Forecast Changes on Various Sectors

With attention to long-term forecasts governments and industry can plan for the weather ahead months or years in advance.

Various sectors are preparing for the weather extremes predicted as part of climate change and deciding how to manage limited resources as populations rise.

The energy market for instance, relies on long-term forecasts to manage both generating energy and its delivery on demand.

It varies in several ways but most particularly according to weather conditions.

impacts of forecast changes on various sectors

Other industries that benefit from accurate long-term forecasting are:

  • Agriculture, for planting and harvesting around seasonal changes.
  • Aviation, since riding the jet steams uses less fuel.
  • Open cast mining, for controlled blasting.
  • Construction, in real time and over the long term.
  • Retail, to manage stock.
  • Leisure and tourism, where weather extremes have the capacity to negatively affect entire regional economies.

The way things look set, we will all be taking more notice of the weather. 

How People Can Adapt to Changes in the Forecast 

people can adapt to changes in weather

Predicting the weather is science, but not a wholly predictable one.

But historically, civilizations have flourished where weather conditions have been predictably stable.

It is especially true in the fertile crescent between the Mediterranean Sea and the Euphrates and Tigris rivers or along the River Nile.

To survive the weather, there seems no doubt that modern man will have to adapt. Change is imminent and there will be new risks.

How the extremes affect local ecosystems, both natural and manmade, is what will make the changes survivable.

For example, awareness of the risks, flooding and drought, has increased, but progress is patchy and slow overall. 

An Important Consideration

Globally, preparing for climate change is impeded by a lack of funding, commitment or understanding and the level of urgency.

Therefore its place in policy as a priority is not the same for all.

Fact: The effect of global warming can be seen in the sinking of the Maldives and the Solomon Islands, but no real actions are taken as other places remain unaffected.  


Can weather forecast change in 24 hours? Yes, it certainly can change because we are not living in a static atmosphere.

So many factors, including temperature, humidity, and air pressure go into determining the weather pattern.

But, a change in these factors can lead to a sudden change in the weather forecast.

And it seems things are less likely to get better mainly due to the issue of global warming.