2017 North American heat wave
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Template:Others The 2017 North American heat wave affected more than 60% of the United States. Alaska reached temperatures as high as 31°C (88°F). It took place on the west and east coasts and along the entire length of the southern border.
In the Southwestern United States, the heat wave began causing economic problems in June 2017. More than 40 airline flights of small aircraft were grounded, with American Airlines reducing sales on certain flights to prevent the vehicles from being over the maximum weight permitted for safe takeoff. Las Vegas tied its record high at 117 degrees Fahrenheit (47 degrees Celsius).
Western Washington State began to experience what would be an extremely hot summer for the region. Both the capital, Olympia, and Seattle broke records for the entire month of June.
During the entire month, NOAA recorded a high pressure ridge hovering over Washington State, Oregon, Idaho, northern California, and western Montana. Florida experienced extreme heat for the entire month, setting a record for hottest July. Only a single day had a high temperature below 32.2°C (90°F).
Several daily record highs were set Thursday, Aug. 2, including: Medford, Oregon (109°F)(42.8°C), The Dalles (108°F)(42.2°C), Portland, Oregon (103°F)(39.4°C), Eugene, Oregon (102°F)(38.9°C), Olympia, Washington (96°F)(35.5°C), Seattle (94°F)(34.4°C), Santa Maria, California (88°F)(31.1°C). Smoke covering much of the region (from wildfires in British Columbia, Canada) kept temperatures below all-time record levels. In the first week of August, much of the Pacific Northwest was covered in haze, resulting in poor air quality. It was predicted to take at least another week to clear.
Juneau, Alaska set record highs on August 5–6, during a week of highs in the 70'S (20'S). Much of southeastern Alaska saw temperatures reach the 80's (26+).
On August 7, Seattle matched its all-time record for consecutive days without precipitation.
West Coast high temperatures
|Date||State||City||Recorded High Temp|
|June 20, 2017||AZ||Phoenix||119°F, 48.3°C|
|June 21, 2017||AZ||Prescott||105°F, 40.5°C|
|June 20, 2017||AZ||Tombstone||110°F, 43.3°C|
|June 20, 2017||AZ||Tucson||116°F, 43.3°C|
|June 21, 2017||AZ||Winslow||108°F, 42.2°C|
|June 25, 2017||CA||Burbank||111°F, 43.9°C|
|June 20, 2017||CA||Death Valley National Park||127°F, 52.8°C|
|June 20, 2017||CA||Needles||127°F, 52.8°C|
|June 21, 2017||CA||Ocotillo Wells||125°F, 51.6°C|
|June 20, 2017||CA||Palm Springs||122°F, 50°C|
|June 22, 2017||CA||Redding||113°F, 45°C|
|June 18, 2017||CA||San Jose||103°F, 39.4°C|
|June 19, 2017||CA||South Lake Tahoe||90°F, 32.2°C|
|June 20, 2017||CA||Thermal||123°F, 50.5°C|
|June 22, 2017||NM||Tucomcari||108°F, 42.2°C|
|June 20, 2017||NV||Las Vegas||117°F, 47.2°C|
|June 20, 2017||NV||Reno||104°F, 40°C|
|June 20, 2017||NV||Tonopah||102°F, 38.9°C|
|June 25, 2017||OR||Portland||101°F, 38.3°C|
|June 25, 2017||WA||Olympia||98°F, 36.6°C|
|June 24, 2017||WA||Quillayute||92°F, 33.3°C|
|June 25, 2017||WA||Seattle||96°F, 35.5°C|
East Coast high temperatures
|Date||State||City||Recorded High Temp|
|June 12, 2017||IL||Chicago||95°F, 35°C|
|Sept 20 2017||MO||St Louis||97°F, 36.1°C|
|Sept 25 2017||NY||Syracuse||91°F, 32.7°C|
|Sept 24 2017||VT||Burlington||91°F, 32.7°C|
Eastern United States
St Louis, Missouri
St. Louis, Missouri experienced 121 cooling degree days during the September heat wave. Compared to their previous average of 31 cooling degree days, this number became a new record. Cooling degree days are defined as the number of days a person leaves their air conditioner on when the temperature is above 65°F (18.3°C). This put a large strain on the Missouri state power grid, causing many outages.
Cleveland, Ohio also had a heat stretch during the September heatwave. On September 25, 2017, Cleveland reached 94°F (34.4°C), setting a new record for above 90°F (32.2°C) highs for five consecutive days. High pressures of heat centered over the Great Lakes are the cause for increased heat and humidity in the area.
Pittsburgh, Pennsylvania was mostly affected during the June heatwave in 2017, reaching highs of 80°F (26.6°C). The record for consecutive days of high temperatures was also broken. What was originally 10 days recorded late June of prior years, was beaten by 13 consecutive days of highs in the 80°F (26.6°C).On September 24, 2017, Pittsburgh reached a high of 90°F (32°C) , the first time since June 13.
Syracuse, New York
Upstate New York also suffered from the 2017 heatwave, Syracuse reached four consecutive days of high temperatures. On September 27, 2017, the 90 degree Fahrenheit mark was hit, breaking the previous record of 83 degrees that was set in 1929. With three consecutive days above 90°F (32°C) it was officially considered a heatwave.
- "US News". https://www.usnews.com/news/best-states/alaska/articles/2017-12-10/alaska-sees-record-high-temperatures-in-december.
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- "Southeast Alaska’s weekend heat breaks records" (in en). http://juneauempire.com/news/local/2017-08-07/southeast-alaska-s-weekend-heat-breaks-records. Retrieved 7 August 2017.
- Samenow, Jason (7 August 2017). "Rainless in Seattle: City has longest streak on record without precipitation". https://www.washingtonpost.com/news/capital-weather-gang/wp/2017/08/07/rainless-in-seattle-city-has-longest-streak-on-record-without-precipitation/. Retrieved 7 August 2017.
- "Summary of the Great Southwest U.S. Heat Wave of 2017 by Dr. Jeff Masters | Category 6". Weather Underground. https://www.wunderground.com/cat6/summary-great-southwest-us-heat-wave-2017.
- "Late-September heat wave shatters century old records in midwestern, northeastern US". https://www.accuweather.com/en/weather-news/late-september-heat-wave-shatters-century-old-records-in-midwest-eastern-us/70002827.
- "Late-September heat wave shatters century old records in midwestern, northeastern US - AccuWeather.com". https://m.accuweather.com/en/weather-news/late-september-heat-wave-shatters-century-old-records-in-midwest-eastern-us/70002827.