Thunderstorm — new active threat area
Right now
The most recent data we hold from Environment and Climate Change Canada arrived 17 minutes ago, and this point is in it.
One other detection within 20 km in the last 24 hours, 20 km from here.
Official warning
This warning has expired. Its original text remains below.
Highest level recorded: Moderate.
Level in this notice: Moderate.
Environment Canada
yellow warning - severe thunderstorm - in effect
At 3:41 p.m. EDT, a severe thunderstorm is located near Deux-Rivières. This severe thunderstorm is moving east at 35 km/h. Up to quarter size hail is possible.
###
Large hail may cause significant damage and injury.
Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
Take immediate cover if a thunderstorm approaches. If outside, protect yourself from hail.
This alert expired on 7 October 2026 at 21:40 UTC. It is kept here as a record.
It is one of only 2 we have recorded within 20 km of this point since 7 October 2026.
What the source measured
Environment and Climate Change Canada reported: At 3:41 p.m. EDT, a severe thunderstorm is located near Deux-Rivières. This severe thunderstorm is moving east at 35 km/h. Up to quarter size hail is possible. ### Large hail may cause significant damage and injury. Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain.
How we know
One source: Environment and Climate Change Canada. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Event data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Legacy data-support index | 0.47/1 |
| Coordinates | 46.5422, -77.9962 |
| Nearest city | Petawawa (91 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact tier | minor |
| Timestamp | 2026-10-07T18:44:00.000Z |
| Source | https://dd.weather.gc.ca/today/alerts/cap/20261007/LAND/19/T_QCCN00_C_LAND_202610071942_3010401461.cap |
| Licence | ECCC Data Services End-use Licence 2.1.1 · Environment and Climate Change Canada · Grouped by area and warning; CAP severity mapped; map location derived from alert geometry. Original warning text preserved. |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: cap_ca_eccc. Occurrence: 2026-10-07T18:44:00.000Z.
First archived: 2026-10-07T19:14:49.632Z. Material modification: 2026-10-07T19:58:10.324Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
3 retained revisions changed source fields this page does not show; the index, severity and version stayed the same.
Score breakdown
Technical details
| Event | thunderstorm |
| AreaDesc | new active threat area |
| Geocodes | [{"name":"layer:EC-MSC-SMC:DLC:1.1","value":"issued"},{"name":"profile:CAP-CP:Location:0.3","value":"2485907"}] |
| Onset | 2026-10-07T19:41:00-00:00 |
| Effective | 2026-10-07T19:42:07-00:00 |
| Expires | 2026-10-07T21:40:07-00:00 |
| TimeBasis | onset |
| LocalDay | 20261007 |
| CapTimeZone | America/Toronto |
| CapDayBasis | area-centroid-timezone |
| CapSeverity | Moderate |
| DailyPeakCapSeverity | Moderate |
| CapUrgency | Immediate |
| CapCertainty | Likely |
| Urgency | Immediate |
| Certainty | Likely |
| Headline | yellow warning - severe thunderstorm - in effect |
| Description | At 3:41 p.m. EDT, a severe thunderstorm is located near Deux-Rivières. This severe thunderstorm is moving east at 35 km/h. Up to quarter size hail is possible. ### Large hail may cause significant damage and injury. Severe thunderstorm warnings are issued when imminent or occurring thunderstorms are expected to produce damaging hail, wind or rain. |
| Instruction | Take immediate cover if a thunderstorm approaches. If outside, protect yourself from hail. |
| SenderName | Environment Canada |
Safety information
What to do in a thunderstorm
Three things first, then what to do before, during and after. From the US National Weather Service.
For this reportSevere Weather · Canada
When thunder roars, go indoors
If you can hear thunder, lightning can reach you. Go into a closed building or a hard-topped car with the windows shut.
NWSNowhere is safe outdoors
Not under a tree, not in a tent or a shelter open at the sides. Get away from water and high ground.
NWSWait 30 minutes
Go back out only 30 minutes after the last thunder.
NWS
Before, during, after. Here it is “after”.
Before · When storms are forecast
Check the forecast
Before going out, especially to mountains, the sea or open fields.
Know where to shelter
A closed building or a car you can reach quickly.
National Weather Service
During · While it storms
Keep off water and plumbing
No baths or showers, no washing up.
Away from windows
And from doors and corded phones.
Flash floods
Never drive or walk into a flooded road.
National Weather Service
After · When it has passed
Thirty minutes
After the last thunder, not the last rain.
Fallen lines
Keep away from power lines and anything touching them.
National Weather Service
Questions people ask
Is a car safe in a thunderstorm?
A hard-topped car with the windows closed is: the metal shell carries the current around you. Convertibles, bicycles and motorbikes are not. Source: US National Weather Service.
How long should I wait to go back out?
Thirty minutes after the last thunder you hear. Source: US National Weather Service.
Is it safe under a tree?
No. It is one of the most dangerous places in a storm. Source: US National Weather Service.
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