A severe thunderstorm headline can describe an entire region while leaving a household with a much smaller question: does the warning apply here, and what action does it ask us to take? Australia’s Bureau of Meteorology provides the weather warning; state and territory emergency services provide local safety directions. Reading both is more useful than treating a national headline as a forecast for your street.
This guide explains how to read a Bureau warning, why a radar image is not the same thing as an official warning, and which practical steps Australian emergency services recommend before, during and after a storm. It is general information, not a live forecast or an instruction to evacuate. For immediate decisions, follow the current BOM warning and your state or territory emergency service.
Start with your local warning
The Bureau’s national warnings page links to state and territory warnings, forecasts, radar and observations. Severe thunderstorms can be localised and can change quickly. A national weather story may describe a broad pattern, but the risk at a particular address depends on the warning area and the latest update.
Open the official warning for your state, then check whether your suburb, town, road or district is named or included on the warning map. Read the issue time and the next-update time. A warning written earlier in the day can be superseded, cancelled or extended. Do not assume that a warning is current simply because a search result, social post or screenshot is still visible.
For example, imagine that a family member forwards a screenshot just before a planned school pickup. Before changing the trip, open the official source, check its issue time and read the locations. The screenshot may be accurate but no longer the latest advice. Share the current link with the person making the journey, along with the named area and time checked. This is an illustrative communication example, not a report of a real incident or permission to travel.
What makes a thunderstorm “severe” in Australia?
The Bureau classifies thunderstorms as severe when they produce or are expected to produce at least one of these hazards:
- large hail, generally 2 centimetres in diameter or larger;
- damaging wind gusts of 90 kilometres per hour or more;
- a tornado; or
- heavy rainfall that may lead to flash flooding.
The Bureau uses “very dangerous” for higher-end hazards such as giant hail of 5 centimetres or larger, destructive wind gusts of 125 kilometres per hour or more, tornadoes, or intense rainfall that may lead to dangerous and life-threatening flash flooding. These thresholds explain the terms used by the warning service; they do not mean that every storm will produce each listed hazard.
Warnings identify the potential phenomena and the areas that could be affected. They can also include observations, expected movement, timing, recommended actions and a time for the next update. Read the actual warning wording rather than relying on a coloured map alone. A map provides a useful overview, while the text explains the threat and the actions the Bureau recommends.
Warning versus forecast versus radar
These products answer different questions:
- Forecast: What weather is expected over an area or time period?
- Severe thunderstorm warning: What severe hazards are occurring, likely, or reported in the named warning area, and what should people do?
- Radar: What precipitation is being detected or projected around a radar site?
- Thunderstorm tracker: Where automated analysis indicates thunderstorm activity may be present or developing.
The Bureau specifically says its Thunderstorm Tracker is not a warning. It is an automated indicator. Specialist meteorologists use radar and other evidence to prepare severe thunderstorm warnings, which provide the threat area and expected movement. A colourful radar image may catch attention, but it is not a substitute for the warning text or emergency-service advice.
Radar can also have limitations. The Bureau explains that heavy rain, distance, equipment and data-transfer issues can affect what a radar display shows. Its rain map combines observations and forecast-model information on different parts of the timeline. If a map looks quiet but the official warning for your area says to act, follow the warning. If you cannot load a map, use the text warning and local emergency-service channels.
A quick routine when a warning appears
Use a short sequence so that important details are not lost in a stream of posts:
1. Check the source. Use the BOM warning page or BOM Weather app, then consult the state or territory emergency service named by the warning.
2. Confirm the place. Match the warning’s locations and map with your actual town, suburb, travel route or property.
3. Read the hazards. Note whether the warning identifies hail, damaging wind, heavy rain, flash flooding, a tornado or more than one risk.
4. Check times and updates. The issue time, forecast period and next update help you understand how fresh the advice is.
5. Act on the stated advice. If authorities advise sheltering, avoiding travel, preparing to leave or leaving, follow that specific direction.
6. Keep checking. Storms can form, split, weaken or move. A warning can change after you first read it.
If mobile data becomes unreliable, use available local radio or emergency-service channels. Do not depend on a single app notification as proof that no danger exists. Notifications can be delayed, devices can lose power, and not every service displays every warning product.
Before storms arrive
The best preparation is easier to do before wind and rain begin. VICSES advises households to secure loose outdoor items, clean gutters and downpipes, park vehicles under cover and plan what to do if services are disrupted. NSW SES similarly recommends knowing local risk, staying informed and having a plan.
Keep the preparation practical:
- Secure or bring inside lightweight furniture, umbrellas, bins and other objects that wind could move.
- Keep phones charged and make sure you can receive official warnings; know where a battery-powered radio or backup power source is available if you use one.
- Move a vehicle away from trees or exposed areas when it is safe and practical to do so.
- Know which official warning and emergency-service channels cover your address.
- Make a household plan for children, older people, pets and anyone who may need help receiving or acting on an alert.
- If local authorities identify a flood risk, learn which routes are safe and where you would go if directed to leave.
Do not climb onto a roof or undertake risky work to clear gutters once a storm is approaching. Preparation should not create a new hazard. If you are unsure whether a task is safe, leave it and follow local emergency-service advice.
During a storm
VICSES advises people to stay indoors and away from windows during a storm. If you are outside, move to a safe indoor place where possible and stay away from trees, drains, waterways and powerlines. The agency says to assume fallen powerlines are live and keep clear of them.
If you are driving, reconsider or avoid travel during dangerous conditions. NSW SES recommends checking Live Traffic, obeying road closures and never driving, riding or walking through floodwater. Floodwater can conceal damage, move unexpectedly and place both travellers and rescuers at risk. If a road is flooded, stop and find another route; do not test the depth.
If you are already on the road and conditions deteriorate, follow the relevant emergency-service instructions and traffic closures. Do not stop beneath trees or near powerlines to wait out a storm. Find a safe place away from those hazards, and do not continue into water-covered roads or low-lying areas.
If authorities direct you to shelter, prepare to leave or evacuate, follow the instruction for your location. General editorial guidance cannot determine whether a particular home is safe or whether an evacuation route is open. Use current local warnings and emergency-service directions for that decision.
After the storm passes
The end of heavy rain does not mean every hazard has ended. VICSES warns that trees can be unstable after storms and says to stay clear of damaged roads, debris and fallen powerlines. Floodwater can remain dangerous after rainfall eases, and road closures may continue while crews inspect damage.
Before going outside, check current official advice. Avoid entering damaged or flooded buildings until authorities say it is safe. If there are fallen powerlines, keep away and report them through the appropriate local channel. Do not touch wires, fences or objects that may be in contact with a line. For building utilities, use licensed professionals where inspection or repair is needed; do not improvise electrical or gas repairs.
If your property is damaged, document it only when it is safe to do so. Keep people and pets away from unstable structures, floodwater, trees and debris. Contact the relevant emergency service if you need assistance, using the correct state or territory contact information. Call Triple Zero (000) for a life-threatening emergency in Australia.
Why the same storm can affect places differently
“Multi-state” describes a broad weather pattern, not identical conditions everywhere. A storm cell can bring large hail or destructive winds to one locality, heavy rain and flash-flood risk to another, and much less severe weather nearby. Timing can differ too: a warning may be issued for one district before a storm reaches another.
That is why it is risky to use a national headline as a local forecast. It is also why a warning map may change shape over a short period. The Bureau explains that severe thunderstorms can be difficult to pinpoint and may develop or dissipate quickly. Local warnings and emergency-service instructions are more useful for decisions about a specific trip or property.
A useful household handover names the warning product, the place, the issue time and the action. “Check this warning for our route, updated at this time” gives another person something they can verify. “The whole state is dangerous” may omit the relevant locality; “the radar is clear” may overlook a warning. Neither broad statement should substitute for checking the source. If two people are making separate journeys, each route needs its own check rather than assuming the same screenshot answers both questions.
Frequently asked questions
### Is the BOM Thunderstorm Tracker an official warning?
No. The Bureau says the tracker is an automated indicator of thunderstorm activity, not a warning. Read the official Severe Thunderstorm Warning for the locations, hazards and recommended actions.
### What counts as a severe thunderstorm in Australia?
The Bureau classifies a storm as severe when at least one specified hazard is occurring or expected: large hail of 2 centimetres or more, damaging wind gusts of at least 90 kilometres per hour, tornadoes, or heavy rain that may cause flash flooding.
### Should I drive through shallow floodwater?
No. NSW SES advises never to drive, ride or walk through floodwater. If a road is flooded, stop and find another route. Follow local road closures and emergency-service advice.
### Do storm warnings stay valid all day?
Not necessarily. Read the issue time and next-update time. Warnings can be updated, cancelled or extended as storms change.
### Where do I check if a warning applies to my suburb?
Use the Bureau’s current warnings page or BOM Weather app and read the locations and warning map. Then check the relevant state or territory emergency service for local action advice.
The practical takeaway
When severe thunderstorms are in the news, first find the official warning for your exact area. Read the hazards, places, issue time, next update and recommended actions. Treat radar and trackers as supporting information, not as a replacement for a warning. Prepare before storms arrive, stay indoors and away from windows when advised, keep clear of trees and powerlines, and never enter floodwater.
This is a guide to interpreting warnings, not a live storm bulletin. For immediate decisions, follow the newest BOM warning and your state or territory emergency service. Check again when your location or travel plan changes.
Sources and research note
Research checked 25–26 October 2026 (Asia/Dhaka). Primary sources: [BOM warnings and alerts](https://www.bom.gov.au/weather-and-climate/warnings-and-alerts), [BOM severe-weather warning guidance](https://www.bom.gov.au/resources/learn-and-explore/severe-weather-knowledge-centre/severe-weather-and-coastal-hazard-warning-services), [BOM Thunderstorm Tracker explanation](https://www.bom.gov.au/weather-services/about/thunderstorm-tracker.shtml), [VICSES storm safety](https://www.ses.vic.gov.au/plan-and-stay-safe/emergencies/storm), and [NSW SES during a storm](https://www.ses.nsw.gov.au/during-emergency/during-storm), [NSW SES Steer Clear](https://www.ses.nsw.gov.au/steer-clear), and [BOM app/rain-map help](https://www.bom.gov.au/bom-weather-app/weather-app-help-and-support). The earlier event-video link could not be reopened during final review; no event-specific forecast from it is asserted here. Current Australia Trends RSS fetched 25 October about 13:48 Dhaka showed “Australia multi state thunderstorm system” at 2,000+. Live warnings were checked as a research snapshot only; they may have changed by publication or reading time. The article does not assert that a warning remains current.
Limited similarity screening used two targeted web searches for the warning-guide angle; official warning pages and common safety advice appeared. This article distinguishes warning, forecast, radar and tracker products and attributes safety instructions to BOM/VICSES/NSW SES. It is not a comprehensive plagiarism scan or uniqueness guarantee. The original built-in AI-generated illustration is conceptual; the phone display is decorative, not an operational warning map, and the scene does not depict a real location or current warning.