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Document Date
March 25, 2021
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Quarterly Climate Impacts and Outlook for the Western Region for December 2020 – February 2021.  Dated March 2021.

Winter temperatures were well above normal in southern California and slightly above normal in all of Nevada, Washington, and Oregon.  Near or slightly below normal temperatures were found in parts of New Mexico, Arizona, Utah, Colorado, Wyoming, Montana, and Idaho.  Much of the West saw below normal precipitation throughout the winter.

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Document Date
March 22, 2021
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Quarterly Climate Impacts and Outlook for the Great Lakes Region for December 2020 – February 2021.  Dated March 2021.

Winter temperatures ranged from 1°C (2°F) below to 3°C (5°F) above normal.  Winter precipitation was below average, with the basin seeing 55% of average.

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Document Date
March 22, 2021
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Quarterly Climate Impacts and Outlook for the Midwest Region for December 2020 – February 2021. Dated March 2021.

Winter temperatures averaged to within a few degrees of normal across the region, but averaging hid the big temperature swings seen this winter.  Winter precipitation was generally below normal across the Midwest.

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Document Date
March 19, 2021
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Quarterly Climate Impacts and Outlook for the Missouri River Basin December 2020 – February 2021. Dated March 2021.

Temperatures this winter were extreme on both ends of the spectrum. Several states in the region ranked in the top 10 warmest Decembers and Januarys, while others ranked in the top 10 coldest Februarys.  Although much of the region was on the dry side this winter, only North Dakota ranked in the top 10 at 3rd driest.

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Document Date
March 19, 2021
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Quarterly Climate Impacts and Outlook for the Southern Region for December 2020 – February 2021. Dated March 2021.

Winter temperatures primarily ranged between 4°F below normal to 1°F above normal across the region.  Winter precipitation varied spatially across the Southern Region, but was primarily below normal.

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Document Date
March 18, 2021
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Quarterly Climate Impacts and Outlook for the Northeast Region for December 2020 – February 2021.  Dated March 2021.

The Northeast had its 20th-warmest winter at 1.8°F above normal and saw 104% of normal winter precipitation, ranking in the middle third of all years.

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Document Date
March 18, 2021
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Quarterly Climate Impacts and Outlook for the Gulf of Maine Region for December 2020 – February 2021. Dated March 2021.

Winter was up to 5°C (9°F) warmer than normal.  Winter precipitation ranged from 50% of normal to 150% of normal.  Sea surface temperatures over the entire Gulf of Maine were strongly above normal for the winter season.

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Document Date
March 18, 2021
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Quarterly Climate Impacts and Outlook for the Chesapeake Bay Region for December 2020 – February 2021. Dated March 2021.

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Document Date
March 15, 2021
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Quarterly Climate Impacts and Outlook for Hawaii and the U.S. Pacific Islands Region for December 2020 – February 2021.  Dated March 2021. 

Across the central and eastern equatorial Pacific Ocean, sea-surface temperatures (SSTs) were below normal with La Niña conditions present and a La Niña Advisory still in effect as of the end of February.

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Document Date
March 12, 2021
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Quarterly Climate Impacts and Outlook for Alaska and Northwestern Canada for December 2020 - February 2021; outlook for April - June 2021. Dated March 2021. 

Winter started at the beginning of November with the early arrival of a record setting 40cm snowfall. Conditions remained snowy resulting in 66cm depth of snow on the ground at the airport at the end of February. Northwest Canada & Alaska was mostly dryer than normal.