National Weather Service United States Department of Commerce

Heavy Snow Across the Northern Plains and Great Lakes; Strong Winds for the East

Travel conditions will be challenging across the northern Plains, Great Lakes and east coast through Thanksgiving holiday weekend. Heavy snow, blizzard conditions, for the upper Midwest and Great Lakes region through Thanksgiving to be followed by another strong storm for the Plains, Great Lakes and Northeast this weekend. Strong winds are expected with these systems adding to travel difficulties Read More >

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Day 3 Heat Risk
Day 4 Heat Risk
Day 5 Heat Risk
Day 6 Heat Risk
Day 7 Heat Risk
 
Category Level Meaning
Green 0 No Elevated Risk
Yellow 1 Low Risk for those extremely sensitive to heat, especially those without effective cooling and/or adequate hydration
Orange 2 Moderate Risk for those who are sensitive to heat, especially those without effective cooling and/or adequate hydration
Red 3 High Risk for much of the population, especially those who are heat sensitive and those without effective cooling and/or adequate hydration
Magenta 4 Very High Risk for entire population due to long duration heat, with little to no relief overnight
 
 
Day 3 Heat Index
Day 4 Heat Index
Day 5 Heat Index
Day 6 Heat Index
Day 7 Heat Index
 

 

NWS Heat Index values

 

Classification Heat Index Effect on the body
Caution 80°F - 90°F Fatigue possible with prolonged exposure and/or physical activity
Extreme Caution 90°F - 103°F Heat stroke, heat cramps, or heat exhaustion possible with prolonged exposure and/or physical activity
Danger 103°F - 124°F Heat cramps or heat exhaustion likely, and heat stroke possible with prolonged exposure and/or physical activity
Extreme Danger 125°F or higher Heat stroke highly likely