Severe Weather Reporting (CANWARN)

When reporting severe weather to a net or "Severe Weather Reporting Line" be sure to include the following:

What to Report
Hail 2 cm dia. and larger hail damage time hail began and ended depth if covering ground signs of damage, eg: flattened crops broken windows, dented cars.
Wind damage 90 km/h or higher moderate or severe structural damage uprooted trees, time wind surge hit, direction and duration
Flooding rain 25-50 mm in 1 hr causing flooding roads/fields under water, overflowing creaks/ditches, mudslides near-zero visibility during cloudburst
Tornado / Funnel all sightings time seen, description of size, distance away, direction of movement if no funnel, debris rising was the tornado funnel shrinking or enlarging? was it accompanied by sound? hail? +damage? tornado damage discovered in absence of sighted tornado or after the event has passed
Rotating cloud under storm all sightings time seen, size of lowering, where was it relative to main part of the storm?
Roaring sound all occurrences time, direction, prevailing sky conditions
Unusual sightings other events
(year round)
all occurrences waterspouts, large dust devils, etc. damaging wind, blizzard/snow squalls/fog with near-zero visibility, freezing rain.

Severe Weather Precautions

If your house is in a low lying area be prepared to move to higher grounds during floods watches.

Seek shelter.

Do not try to walk through flash floods.

Avoid driving through flooded areas. If caught there, watch for road washouts and avoid dips and underpasses.


Close windows and doors and keep away from windows, doors and fireplaces.

Don't go outside unless it is absolutely necessary.

Before the storm hits, unplug appliances including radio, and television and computers and do not touch electrical items or telephones during the storm.

Do not take a bath (both water and metar are electrical conductors).

Get inside a vehicle or building if possible.

Avoid water and objects that conduct electricity (eg tractor, golf clubs, metal fence, bicycle).

Do not stay in open spaces or under tall objects (trees, poles).

If no shelter is available crouch down, feet close together with your head tucked down. If in a group, spread out, keeping people several yards apart.

Remember, lightning victims can be revived with CPR even when there is not pulse.

Stay in the vehicle with windows closed. Be wary of downed power lines that may be touching your car. You are safe in the car but may receive a shock if you step outside.

Avoid touching metal parts of the vehicle.

Do not drive, - wait. But don't park under the trees or other tall objects that may fall over in the storm.

Stay inside with the doors and windows shut. Stay away from windows, doors nad exterior walls.

Go to a small, interior room or stairwell on the lowest floor of the building (bathrooms are often the best choice).

If possible, crouch under heavy furniture.

Protect your head with a cushion or a mattress.

Seek shelter in a building (not a car or mobile home) immediately.

If no shelter is available, lie flat in a low dry spot (ravine or ditch) or under a low bridge. Keep alert for flash floods.

Protect your head.

As a last resort, hang on tightly to the base of a shrub or small tree.

Do not stay in a vehicle or mobile home, and do not try to outrun a tornado by driving especially in populated areas.

If possible run to a nearby solid structure (shelter or building).

If no solid structure is nearby lie flat in a dry ditch or ravine outside. Keep alert for flash floods.

Protect your head.


Stay away from windows and glass doors.

Be alert for signs of high winds or a tornado (especially if the hail is large) and follow tornado precautions if necessary.

Seek cover, face away from wind and protect your head.

Be alert for signs of high winds or a tornado (especially if the hail is large) and follow tornado precautions if necessary.

Keep head and face away from windows.

Be alert for signs of high winds or a tornado (especially if the hail is large) and follow tornado precautions if necessary.

For more information visit Environment Canada's Severe Weather Site.