What is a heat dome? Extreme temperatures in the Pacific Northwest, explained

Exposing the Big Game's avatarThe Extinction Chronicles

https://www.cbsnews.com/news/what-is-heat-dome-pacific-northwest/

BY JEFF BERARDELLI

UPDATED ON: JUNE 29, 2021 / 2:59 PM/ CBS NEWS

https://www.cbsnews.com/embed/video/?v=9d3ea23747daf3b68ca7bee91c41f9d0#vVl7b9tGEv8qAoHqj7No8U3KhVHIdnL1XR6GXR8OsAxhyR1KW%2FMVLilZMfTdb2ZJirKc1OnVKJKIy33Ne%2BY3zJPG6iovErbRTqqyhpHGYSUi0E5wIB9wSRtpK8Eh106eNFFBKrWTuyet2hS0Z5VzXBcch24U2Y4FTAfLdXXH5BOd%2BYanG5FleWEcWyx0cW9aPF5DfEkneBjwaRX8t7zhl5YxOdts5gHj082HQub%2Furqd4m6Z1AvcWbBIxCLSs7yslmuQlb4EVulrtgK9hCgvub7GiSWUepzjBMMdUSJSVoEeLVm2ALyrElVCPF81lw0%2BdZcNwjIXiRyIbNBcNqDbB3S7Rvp4wEM4iOskefWOOuNQttfoEqpKZIvBTFMX8jyFGd0UsSzPRMSS397kukqkeISlhXZiepYz8TzPtQ3DQN7rklUiz7QT1wz61w8shATJGsGJHeAFSfOeoYBozJQtQJK1JRlpWVWFPJmNZ%2BMolBmspXmMA4H0KhEdR3k6Gy%2FrcDYWs3E5G1uGZc7GhoejCT0DxgzP0a0JoEswO0SXwFfuGY5vcsY9z5mNq2WdhhkTyWzsOcaj7RmzcWCBETt2aNvgMdcIeeC4lhG7rgUeiuI33OhxLVEc%2FaV7RKISIPUQlagrHerPddj4D2lQ35HXfcd2HUdvmTj%2BvVigbpZ%2FuxJMKzAefQu14DMyp%2BkazHB44IaWwc2JGbuhC9ybOMHfpYXtSCtKTAuwvi2TZ%2BqQRYLJ4pilyeJY5LMxK1AFKwv%2FUcqYjV8L8dm4vXg27vPM3v1FmfNjTDJq5bhVfqPw9gVJocqXiTzUO2rKdTzbst3AQ39RYllztTHF%2FADlcWrXQUfV%2BtvJYqLC%2FIRkWUFKVIE5Gz%2FqaQGL2%2BsPuKM%2BUPZ6vX7OS6vkv54dlfaFvEyLnFjUTmKWSKwFmP5FpBI%2FRcHEM9nENj0dY5LpjjHxdBZ6NPLBcZ3AmcROn7NZSkQKSTEkoGRltMQac6eRBAOW4jRLB82Oe%2FQvVkJW%2FUb0PrGUcuL52c2nwfTj%2FvGzTbN2t7c4%2FTg47y5hSdJR0FsKLQ%2F36MJQCJlzPG4ij8AkpUXNJIZhkSLxZqEu0COl3KkA75xGEc6cJXn0sEuS8lZCeVOHMipFCHy3XRZ5JvOy27eEx%2BkFxKxOyNLGCP9oavasn7UnI8cduRPil5Oy43XzO09E9vDMA%2FzY8P3j1XG8Tsv0OIMKI47Pxgt0u18iKfjpCmWftz4ybwv4fA3hHJ15yGS2PsU0apvmMGK4%2B7XoHMYJW5z%2BZJ2xNArxAWlU4kMmVaEeavJLpR4IGugRh4zT2iaL8JHV6gCDSgxTqMpT07DsYc8Fxlncjn%2Byp%2F%2FM80UCF9PL85vp5Xxl4PqqzE7vrqefLj5%2FvB%2BiXYrTVcoKk%2BihFztDuSfSqtjb%2FPMc9ZcJQKNkc4ywOYp7ZZwb57Y%2FvdAt49zRnXfvfX363nL1s3dn52emd%2FE%2BcN8NUWto04LCcY4ReKq0j9z9ZL3HvwcxOFwtarz5ST22Q%2Fn19ImwFJRzKb7CdrjEeHrlhoKgFB6jx3aoIu70ST22wwaLnT41z%2B0Q764obygqarQdkqBCzvH99Kl5bodPcSrnGFIsldufNRVdLFU1nbyEcNsf%2BAn5IaoVMYPSK8EV8YNwjfwFdx6RvxyRtxyRrxyRpxyRnxyRlxyRjxyRhxyRfxyRdxAwRP%2FAEEQHGWn71MlHCF6q15MXPkLSoZfgjs70OEOeQlKSrxwpT6EwfyYUecvzQy89hpDZj%2FiMQonPvOaP8jaVHHIX3NP6DTH3lV73fYfyBHrPKzcVLRBv%2FUfb5Wyt9SFtD9F3fkTnWv9pqTa%2B1Cqh8SJaaf1JAYD%2BQNcYbHG6Kln0gFBC%2BVaeSqw2oMZYUBGDukbgoQM5bT7v%2BY48nPoHJUl8yeRcVvMFsUiiNTOsmDOy0KfZeLrbE1XKeU1zN6M0tH83cRUxZQn5Lehmfxe6dadehy3HjIfzx5R4T%2BvHqzIvoKw2%2FwYscJrl%2BMCZ69mmzxEKTBDAWbbNbE%2Fb3isvZwpbo%2BIqWGxojHPLnDdIADKuJGiLaIx1uy6B6xFBd6DYbA2OnGOpobLVdzYUuYXAwQ4aPC4RpUR5kkDU4Ivdsdn48O7Z%2BBeyd75YAJ%2BL7NTQDuwr5LuMhQlVu6ZVZCXqMIFpjfyX1NLdaZbFbWYErh6Bb%2BrYD0b6xAJHh8h0JtyweRRYqlTvH%2B2q%2Bu8Qx4OQij2HJBF7%2B1S%2FaDlBFAeIPzjHNtPBfkAPECfrVmyDxQxwkYi2O3JVhxcoFp1DgKZjJ2oFA8s4sb0Ty%2Bu3dS3YeoktlZADNtg1V78M4LEqIYUBtr1oYaUu1SYilhq0qGuwQ10j3I5RIjJlpu76zlpZhUqft7MUADujNIozPGwSDC9s22dEkTqLzVC3wLcmUWDHPI5JIf25TmstlBu0je59F%2FAt6b6NF%2FICVqQPVREW3QZVA6izpzSEz18FIcA7rVaYimZuGoK4t5btpvYsJVqMGLGCAVaPLvsoa8W%2BwSHAbie0INZNEyyd2bGhG9bENAMHmzgFeao9yKduR2kExrSzU%2BFNXpcqfWHcDtr8EJYs41dtSlLkumJGzM17mRG%2BKVApW4mQ%2B0hAFikTHH4h2MHmbkxeoJSAKDrjrNz0d3XXvFi95Grdx%2Bzn2%2Bh4oWVO0J4O6GHMJnrsm5Mgtiah67qdflvxWxFIKcASUacUdFT%2BRLK3TAdwC2RkSmpUtO3eF4XDBu1Fz9A0L%2BTtupB7DeCLJkL1BClwwa5ypIn2b22eAOOtB70xNbqy1cWfPary3avsvGXDtO3g%2BqKo6FGxcgHVrhR2UUqGe%2FElqinRd%2F%2BXL37j%2B9xebW6isEMF%2B6EdKcTxA%2Fp85lxzhj2KEvU8z2KhhMO%2BY52XDzTklFACy8No%2FcK6EdZWquXNi%2FJQNd6O9iodwT9dZNjhgMJri6Zc3z21Y8oGDypN1llVClAxtSDZ4pJSGZ36yigTLPHnYY0%2FCld8oTlJP4y2iC8kDX3H2QA1gXvXs%2FrwejWTfT3cJwU73CnpxnRDmiby1bL5CIpumJG5iHGR4T1UwPhtJio6RdU%2FD1UsP%2B1PU5Wlslq9nFff9PYmn9ob3ifwiMlG5Yc2OJHTxhkIPNL5O9syRq5xP7rDTDSympFljmyTBrY3sgKaQsxOWPSeSkstqzz9bd%2BPEaZkCJRW8KCwTWTEIVbTSMnH4fHdY%2BOvN%2BhjTYn2DTswG5eMgLrqZtowTAcTn4I2vQiYWCxF5Y9YfsHpSG1zcI6%2BG%2BzEt95OAPs7AljGSwHsPy%2FAM7btt2Pb%2FR7b5gHbl1n0F7lGNoiZt%2BLcP%2BT8jkCbZ3ouNW7t0O2HXj%2F0%2B2HQDye7oWf0Q7MfWv3Q7oc9Na%2Bn5vXUvJ6a11Pzemp%2BT83vqfk9Nb%2Bn5vfU%2FJ6a31Pze2p%2BgNmkSQg3CIoeNt%2By33MLyWbfmxlp8r2wtmx0L8VcUbxMYd%2FEN1QeWSHhXYqV6kKsuoZCQnUNMYLK5S0WGyyh%2FCbJq%2F5jHK6fI%2FwoD1bb%2F7gSktLoJRIXLPmQs%2F6r3Mulc%2ByDWNYUneY4qN7mBjWUwDV8qakSPluaUs26BvqOrtTY%2FXeZ%2Bo53vSsXa%2FUd7zO2MGWT9JvTvyJqgvJMcL5%2FuOFLybQz0OeM%2BPy%2BVK2GCGKTdNpuz5RjYJfQfMtsJW%2BIX0MB1OJNeadLwozYk1C3ojo3zTN46DsRc8GLqZJJVO1%2FWCmfFXyN6rj2w0ZVX1erFjI36PtbnxFIXy22JCxFr3i8xdGM61ysdMF1VpZso77kRnn%2BIA4YmCtQ2qzcQEkY6QohnIKS9I0U72kWFVyUIKWyF8GVOrzZe60lvBelrK6oQ%2BqDhqyx3f4P

The mostextreme heat waveever recorded in the Pacific Northwest continues to shatter records for another day. Millions of people are currently under excessive heat warnings — many of them sweltering through triple-digit temperatures without air conditioning in a region that usually enjoys mild summers.

Behind the misery is a weather phenomenon known as aheat dome.

What is a heat dome?

A heat dome is a essentially a mountain of warm air built into a very wavy jet stream, with extreme undulations. When the jet stream — a band of strong wind in the upper levels of the atmosphere — becomes very wavy and elongated, pressure systems can pinch off and become stalled or stuck in places they typically would not be.https://www.cbsnews.com/newsletters/widget/e879?v=9d3ea23747daf3b68ca7bee91c41f9d0&view=compact#tVPLbtswEPwVgmczpijJknwpUqRAcykCJD3VRUCRy5iNRAkkZTUo8u9d2nKc9tZDb9Ls7GNml7%2FoMEY7uEC3vyioQQPdUqirhq7owcKMf2roR6kiAuMQbCIjeB0CRPJx0C%2F0dUWjl%2BrZuqdUxIZPTrYdaLqNfoIVlT5a1cH1FPeDv0X4GxVC55LXJVNQZawQoFgjoGCgsqLRPNeqFvT7X6lfZA8p%2BQcYQ1rw0mvoOvuOl4pTUdTK1NmGaQ0Sa3PD6kpwJkwOQnIosQl9S7mb2hsZk2jBRcb4homaCL7NN1uxudAebOwSad7LSGwgkuwBv%2FTQwwcCP6OHHkiEfsSx4uQhEOtI3ANB56yxirjBx%2F0MIa6QPnbSOjToUv5lhKPTLoKLjwuKcTV0Hajk%2Bck4vpF8wzctA1GWrGiykkmTtUxAJRpV50Ybkwy55J1dU53tUShRe%2BmeIHE0HKw6t9YQnuMwYksbbuCQ%2FEgLl09ngoM5PFqUiDBeAXy24FPdKaRaCbk%2FNUQuYidoyUU%2FRjwxewAyQ4sx7GTVcVum4hrqvGWtAMOyDASTueGMiybL6iKrq7I5J5yknKpPAfxSXTpsuqKoz0a6Ld5MvR8mr462toGk8ZHUeun0XSejGXx%2FHACDR2lp3MeLCwHfgtPSvzykziEpDcqCU0fr%2Foze6mO8yjmvcjyiVmQN7qYA1hrZMFNlTW1E05ZlefZqkbI0TwJBdnbq0wMa%2FWBs9y6cEpACLq0Fozo9OZVkWyW7r75DeB%2FjGLa79W49z%2FPVkniFT3e3Tl8I4%2BUyG1i6W5buli2nyd5Oc7deVv4fSi6C%2Fy319fU3

In this case, a ridge of high pressure, which is…

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