National Weather Service United States Department of Commerce

Pacific Storm Moves Inland; Clipper System for the Northeast; Strong Storm Impacting Alaska

In Alaska, a powerful storm will bring dangerous seas, blizzard conditions, strong winds and bitterly cold across the state through mid-week. Meanwhile, Pacific storm will move inland across California with lower elevation rain and accumulating mountain snow; Strong winds will affect the central Great Basin. A clipper system to bring snow and gusty winds for the Northeast corridor into Wednesday. 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