Yellow Severe Thunderstorm Warning in Effect for Nipigon and Rossport
Environment Canada has issued a Yellow Severe Thunderstorm Warning for the Nipigon and Rossport region of northwestern Ontario as a powerful thunderstorm moves southeast at approximately 50 km/h. Residents should prepare for rapidly changing weather conditions capable of producing damaging winds, large hail, intense rainfall, and dangerous lightning.
The storm is expected to bring:
- Wind gusts up to 80 km/h
- Hail up to quarter size (2.5 cm)
- Very heavy rainfall totaling 50–100 mm
- Frequent lightning and rapidly reduced visibility
These conditions can develop quickly and create hazardous travel conditions across highways and local roads.
Flash Flooding and Water Accumulation Possible
Rainfall amounts between 50 and 100 mm falling in a short period can overwhelm drainage systems, causing flash flooding in low-lying areas. Drivers should never attempt to cross flooded roadways, as water depth and road conditions can change rapidly.
Heavy rainfall may also lead to:
- Flooded streets and parking lots
- Washed-out shoulders and culverts
- Reduced visibility during downpours
- Localized power outages from falling trees and branches
Damaging Winds and Large Hail
Wind gusts approaching 80 km/h are capable of breaking tree limbs, damaging roofs, and knocking down power lines. Quarter-size hail can dent vehicles, damage siding, and injure anyone caught outdoors.
If severe weather approaches:
- Move indoors immediately.
- Stay away from windows and glass doors.
- Secure loose outdoor furniture and equipment.
- Park vehicles in a garage or under shelter if possible.
Lightning Safety
Every thunderstorm produces lightning, which can strike several kilometers away from the heaviest rain. When thunder is heard, move inside a substantial building or enclosed vehicle and remain there until at least 30 minutes after the last rumble of thunder.
Stay Alert
Severe thunderstorm warnings are issued when dangerous weather is occurring or expected imminently. Residents of Nipigon, Rossport, and surrounding communities should closely monitor Environment Canada forecasts and be prepared to take immediate protective action if conditions worsen.

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Radar Watch HQ Top 5 Essential Emergency Preparedness Picks
Whether you’re preparing for severe thunderstorms, flash flooding, hurricanes, wildfires, or extended power outages, these five emergency essentials can help keep your household safer when severe weather strikes.
A portable power station provides reliable backup electricity during outages, allowing you to power phones, medical devices, laptops, lights, small appliances, and communication equipment without fuel.
Best for:
- Extended power outages
- Severe thunderstorms
- Hurricanes
- Winter storms
- Wildfires
2. Flood Protection Barriers & Sandless Flood Bags
Flood barriers help divert or absorb water before it enters garages, doorways, and low-lying areas. They deploy quickly and can help reduce property damage during flash flooding.
Best for:
- Flash Flood Warnings
- Heavy rainfall
- River flooding
- Coastal flooding
3. Rechargeable LED Flashlights
Bright, dependable flashlights are essential when the power goes out. Rechargeable or solar-powered models provide long-lasting illumination for navigating safely indoors and outdoors.
Best for:
- Overnight power outages
- Emergency evacuations
- Storm damage inspections
Keep phones, tablets, weather radios, and USB-powered devices charged when the electrical grid is unavailable. A solar power bank offers an additional charging option during prolonged emergencies.
Best for:
- Communication during outages
- Emergency weather alerts
- Travel and evacuation
A NOAA Weather Radio delivers official weather alerts directly from the National Weather Service, even when cellular networks or internet service are unavailable. It remains one of the most dependable ways to receive life-saving warnings.
Best for:
- Tornado warnings
- Severe thunderstorm warnings
- Flash flood warnings
- Hurricane alerts
- Winter storm emergencies
Why Radar Watch HQ Recommends These Essentials
At Radar Watch HQ, preparedness is just as important as staying informed. These five emergency essentials can help you stay connected, protect your property, and safely navigate severe weather events. Having supplies ready before storms arrive allows you to respond quickly when warnings are issued and conditions begin to deteriorate.
