If hail is falling hard where you are in Argentina, stay inside a solid building, away from windows, skylights and glass doors. Do not go outside to save a vehicle, film the hail or retrieve outdoor furniture. Hailstones can strike with great force; a severe thunderstorm can also bring lightning, violent wind and flash flooding. If someone is seriously injured or in immediate danger, Argentina’s official emergency page lists 911 as the national emergency centre, 100 for firefighters and 103 for civil defence.
If you are driving: slow down gradually and keep the car under control. Do not stop abruptly in an active lane or make an unexpected manoeuvre. Seek a safe stopping place outside traffic if the conditions make driving unsafe, while avoiding trees, unstable structures and floodwater. The Argentine Government’s hailstorm safety advice emphasises gradual slowing, suitable distance and avoiding sudden braking.
Quick answer: A hailstorm may develop as severe thunderclouds grow, then arrive with gusts and large drops of rain, followed by sudden impacts from hailstones that can break glass, damage roofs and make roads slippery. The most dangerous period might be brief, but flooding, electrical hazards, broken windows and further storms can continue afterward. The official alert tells you the broader storm risk, not a precise clock for hail at your door.
Official information: Servicio Meteorológico Nacional (SMN) early-warning map · Argentina’s hailstorm response guide · national emergency numbers.
Eight actions to take first
- Check the latest SMN warning for your location and read its time, risk level and recommended actions.
- Remain inside a substantial building and move away from windows, glass roofs and exposed balconies.
- Protect children, older adults and pets indoors before the storm begins; sudden impacts and noise can be frightening.
- Avoid outdoor swimming pools, sports fields, terraces and construction sites. Lightning and strong winds may accompany hail.
- If driving, reduce speed smoothly and maintain distance; stop only where safe and outside active traffic.
- Do not touch downed wires or enter floodwater, even if hail has stopped.
- If glass or roofing breaks, retreat to an interior room and call appropriate emergency services when there is immediate danger.
- Afterward, inspect damage from a safe position and wait for official clearance before entering seriously damaged areas.
Stage 1 — The severe-storm forecast: what SMN alerts actually mean
Argentina’s Servicio Meteorológico Nacional (SMN) operates a national Sistema de Alerta Temprana, or early-warning system. Its public page shows warnings for thunderstorms and other weather events, with information on affected zones and the forecast period. A thunderstorm alert may mention hail as one possible phenomenon.
SMN uses a colour scale. Yellow (amarillo) means potentially damaging weather that may disrupt ordinary activities. Orange (naranja) indicates conditions that can be dangerous for people, property and the environment. Red (rojo) indicates exceptional conditions with potential to cause serious emergencies or disasters and calls for following official instructions.
Do not conclude that an entire province will experience identical hail simply because it is within a highlighted forecast area. Severe thunderstorms can be localised. A damaging hail core may cross one neighbourhood while another nearby receives only rain. At the same time, a map without a warning is not a guarantee that a fast-developing local storm cannot occur.
Check the warning’s issuing time and the region it covers. SMN’s current alerts page and official local civil-defence messages should be used instead of an undated screenshot circulating on social media.
Stage 2 — Before the storm: secure what is safe to secure
Hailstones form inside strong thunderstorm clouds where rising air can keep ice particles aloft long enough for them to grow. Strong updrafts are associated with the potential for large hail. Ground-level conditions do not give a reliable size forecast for every stone that might reach your street.
If hail is forecast but has not arrived, close shutters or blinds and move loose items from exposed balconies where this can be done safely. The Argentine Government’s prevention guide recommends identifying loose roof sheets, flowerpots and other objects that strong wind could throw, as well as considering vulnerable windows and skylights.
Move a vehicle to a safe covered location before the storm if convenient and consistent with current instructions. Do not drive into the path of the approaching storm merely to find a better parking space. An ordinary light awning, trees and insecure roofing may not protect you and can themselves fail in high wind.
Before the event, make sure household members know the safest interior room. Take essential medication, a phone, flashlight and supplies for young children to that area when necessary. Keep pets indoors. Avoid standing on a roof to add last-minute coverings once the wind has begun to increase.
Stage 3 — The first gusts: weather may deteriorate quickly
You might notice the sky darken, rain intensify, branches move suddenly or thunder begin. These signs may precede hail, but their order varies. A storm may bring high wind first and hail afterward, or hail may begin without much useful warning.
The correct protective choice is to enter a substantial building and stay away from exposed glass and windows. A balcony, glass bus shelter, canvas awning or open garage may give a false impression of protection. Hail is not the only hazard: lightning can strike nearby and flying debris can cause injury.
Do not assume you are safe under a tree. Falling branches, strong wind and lightning make trees hazardous shelters. If you are caught outside, seek a properly enclosed building or substantial hard-topped vehicle with windows closed when it can be reached safely.
Schools and workplaces should stop exposed outdoor activity when severe-storm warnings or dangerous conditions require it. Children may become frightened by the loud sound of hail hitting roofs; give one clear instruction at a time and keep them away from glass.
Stage 4 — The hail arrives: what it may sound and feel like
The impacts can sound like stones hitting metal or windows. Hail can be small and relatively harmless, but larger stones can cause bruising, head injury, smashed skylights or damage to roofing and vehicles. A storm can change intensity in minutes.
While inside, stay in an interior area rather than watching through the windows. Avoid rooms below damaged skylights or roofs showing signs of failure. If a window breaks, move people away from flying fragments and do not attempt to hold the glass in place.
If a person is injured, move them to a safer location if doing so does not worsen an injury or expose them to further danger. Seek emergency medical care for severe head injuries, loss of consciousness, significant bleeding or breathing problems. Follow the emergency operator’s instructions. Do not rush outdoors to photograph damage while hail and lightning are continuing.
Hail may accumulate rapidly, creating slippery surfaces and blocking drainage. These conditions can increase the risk of local flooding even before the storm has fully passed.
Stage 5 — What if you are already driving on a road or highway?
The government’s driving advice during hail stresses maintaining control of the vehicle, reducing speed gradually rather than stopping abruptly, avoiding overtaking and increasing the distance from other vehicles. It also notes that heavy hail may reduce visibility and affect windscreens.
Never use an overpass or tunnel as an excuse to stop in an active traffic lane. An unsafe stop can trigger a multi-vehicle collision. Continue only while you can safely see and control the road. If driving becomes unsafe, find an appropriate stopping area completely clear of moving traffic, following police instructions and road rules.
Keep low-beam lights appropriately in use. Avoid sudden steering or braking. Do not attempt to overtake merely to escape a hail core; road conditions can be worse ahead. If the windscreen cracks or visibility becomes critically impaired, prioritise a controlled safe stop and request assistance if needed.
Hail may be accompanied by standing water on roads. Even if hail has finished, do not drive into a flooded underpass, across a damaged bridge or through a fast current. Never assume that other vehicles crossing proves the route is safe.
Stage 6 — Lightning, wind and flooding: why the safest choice may change
A hailstorm is often a severe thunderstorm, not a separate event with only ice falling from the sky. Lightning can remain dangerous during and after the most intense hail. Avoid open fields, swimming pools, isolated trees, rooftop terraces and exposed metal structures.
The national government’s thunderstorm safety guide recommends substantial indoor shelter, staying away from electrical appliances and avoiding water-related activities during lightning. Hard-topped vehicles can offer protection when fully enclosed, but open vehicles and small shelters do not provide equivalent protection.
If flooding begins to enter a building, do not operate electrical switches or attempt to disconnect electricity while standing in water. Move to a safer area and follow local emergency directions. An indoor room away from windows protects against hail, but it is not a safe refuge if electrical hazards or rising water make the room dangerous.
Because the hazards overlap, the correct question is not just whether hail is still falling. It is whether lightning, wind, floodwater and damaged structures still threaten you.
Stage 7 — The quiet interval: do not rush back outside
A brief pause in the impacts does not prove the entire thunderstorm system has departed. More cells may follow, with further hail or lightning. Check SMN alerts and local civil-defence information before returning to exposed activities.
If there is broken glass indoors, keep people and pets away until it can be cleared safely. Do not reach onto a roof or touch damaged wiring without appropriate qualified help. A window that has cracked may break later under wind or handling.
If someone has a cut from broken glass, protect yourself from further injury and seek medical assessment for deep wounds or heavy bleeding. If rainwater has reached electrical equipment, avoid turning it on before a qualified assessment.
Stage 8 — Recovery: damage, safety and the next storm
After the weather has cleared, check vulnerable property carefully, beginning from a safe location. Roof tiles, gutters, skylights, windows, exposed pipes and solar panels can be damaged. A sagging ceiling or broken structural element requires professional assessment, not improvised access from an unstable ladder.
Document damage for the insurer or property manager, where applicable, once conditions are safe. Do not go onto a wet roof to take photographs. Follow local instructions for disposal of broken glass and damaged materials. Keep children away from unsecured panels and shattered windows.
In cities, severe hail may block drains and produce localised street flooding. Report fallen trees, downed wires and unsafe public structures to the relevant authorities. Road reopening and utility restoration may occur after rain and hail have stopped. Avoid unnecessary travel until key routes are confirmed safe.
For farmers and gardeners, hail can damage crops, greenhouses and farm equipment. Assess losses later, when the area is safe. Some damaged tree limbs can remain unstable after the storm; pruning large branches should be left to trained personnel.
A realistic example: an afternoon storm in a central Argentine city
A family notices an SMN orange thunderstorm alert for their area. They move balcony pots into a sheltered space while conditions are calm, close windows and keep a pet inside. During the afternoon, strong gusts arrive, followed by pounding hail. They remain in the windowless part of the home.
A window breaks in another room. Nobody goes there while the hail is still falling. After the impacts stop, the family checks updated warnings and waits until it is safe to isolate the damaged area. They photograph the broken window from a safe position for the property owner. This example is hypothetical, not a live alert for Córdoba, Mendoza, Buenos Aires or any other city.
Seven dangerous misconceptions to correct
- “Small hail always stays small.” Hail intensity and size can change during a thunderstorm.
- “A tree is a good shelter.” Falling branches and lightning make it dangerous.
- “Driving faster will get me out of the hail.” Speed and poor visibility increase crash risk.
- “An overpass is a safe place to stop in a live traffic lane.” Stopping in moving traffic can cause collisions.
- “The ice has stopped, so lightning is no longer possible.” Thunderstorm hazards can persist.
- “A cracked skylight will be safe if I hold it shut.” Glass and framing may fail without warning.
- “Every town under the same alert must receive the same hail.” Thunderstorms are often unevenly distributed.
Hailstorm preparation checklist for Argentina
- Save the SMN alerts page and look up your municipality’s official emergency channels.
- Keep 911 for urgent emergencies, and verify the local civil-defence and fire numbers; national listings include 103 and 100.
- Know a safe interior room in your home, school and workplace.
- Move vulnerable objects away from exposed balconies and secure loose items before the storm.
- Choose safe vehicle parking when there is enough lead time, without unnecessary travel.
- Teach household members to stay away from skylights, exposed windows and broken glass.
- Check weather and road conditions before driving, and never cross dangerous floodwater.
- Keep a flashlight, necessary medicines, safe water and a charged phone available.
Frequently asked questions
How long does a hailstorm last?
It varies widely. The most intense hailfall may be brief, but the broader thunderstorm system and its lightning, wind or flooding can last much longer. Never use a fixed countdown to decide when to go out.
Does an orange SMN alert guarantee hail at my house?
No. It warns of dangerous forecast conditions in the relevant area. Read the alert text to understand the range of hazards and follow local observations and guidance.
Should I hide under a tree if hail starts outdoors?
No. Trees can lose branches and are dangerous during lightning. Seek a sturdy enclosed building or a fully enclosed hard-topped vehicle if safely accessible.
Should drivers stop immediately under a bridge?
Do not make a sudden stop in an active lane or block traffic beneath a bridge. Slow smoothly and find an appropriate safe stopping place away from moving vehicles if needed.
What are the emergency numbers?
Argentina’s official portal lists 911 for emergencies, 100 for firefighters and 103 for Civil Defence. Verify your municipality’s additional contacts, including local medical services.
Official sources and related eduKate guides
- Servicio Meteorológico Nacional — Early Warning System: official alerts, affected areas and risk colours.
- Argentina Government — What to Do During Hail: indoor and driving advice.
- Argentina Government — Hail Prevention: preparing windows and securing loose items.
- Argentina Government — What to Do During Thunderstorms: lightning and water-related hazards.
- Argentina Government — Emergency Numbers: 911, 100, 103 and relevant services.
- Argentina Government — Storm Alert Colour Guidance: yellow, orange and red warning actions.
- eduKateSG — Tornado in the United States: how severe-wind and tornado sheltering differs from hail.
- eduKateSG — Hurricane in the United States: a separate storm type where floodwater and evacuation zones dominate.
Reader note — reviewed 4 November 2026: Educational emergency information, not an active storm alert or personalised driving instruction. Current SMN, local Civil Defence, traffic police and medical responders take priority.