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Synoptic Discussion
December 2017

April U.S. Release: Thu, 8 May 2025, 11:00 AM EDT

Monthly Report
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Climate Briefings
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Use the form below to select from a collection of monthly summaries recapping climate-related occurrences on both a global and national scale.

Report:

Year:

Month:

Synoptic DiscussionDecember 2017

All
National
Global

National

Assessing the U.S. Climate

Monthly assessment of the National Climate

National Climate Report

An analysis of national temperatures and precipitation each month, placing the data into a historical perspective

A monthly discussion of U.S. drought status, with narrative and graphics

Wildfires Report

A summary of wildfires in the U.S. and related weather and climate conditions

National Snow and Ice Report

A national view of snow and ice conditions by month, placing the data and significant events into a historical perspective

Tornadoes Report

A summary of tornadic activity in the Contiguous U.S.

Synoptic Discussion

A summary of synoptic activity in the U.S.

Global

Assessing the Global Climate

Monthly assessment of the Global Climate

Global Climate Report

An analysis of global temperatures and precipitation, placing the data into a historical perspective

Global Drought Narrative

A monthly narrative on the state of global drought

Regional Analysis

A summary of global regional temperature anomalies, placing the data into a historical perspective

Upper Air Report

Tropospheric and stratospheric temperatures, with data placed into historical perspective

Tropical Cyclones Report

A breakdown of hurricanes, typhoons, cyclones, and tropical storms across the globe

Global Snow and Ice Report

A global view of snow and ice, placing the data into a historical perspective

Discontinued

Weather-related hazards and disasters around the world

El Niño/Southern Oscillation

Atmospheric and oceanic conditions related to ENSO

All 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011

July 2011
Synoptic Discussion

Synoptic Discussion for July 2011

August 2011
Synoptic Discussion

Synoptic Discussion for August 2011

September 2011
Synoptic Discussion

Synoptic Discussion for September 2011

October 2011
Synoptic Discussion

Synoptic Discussion for October 2011

November 2011
Synoptic Discussion

Synoptic Discussion for November 2011

December 2011
Synoptic Discussion

Synoptic Discussion for December 2011

January 2012
Synoptic Discussion

Synoptic Discussion for January 2012

February 2012
Synoptic Discussion

Synoptic Discussion for February 2012

March 2012
Synoptic Discussion

Synoptic Discussion for March 2012

April 2012
Synoptic Discussion

Synoptic Discussion for April 2012

May 2012
Synoptic Discussion

Synoptic Discussion for May 2012

June 2012
Synoptic Discussion

Synoptic Discussion for June 2012

July 2012
Synoptic Discussion

Synoptic Discussion for July 2012

August 2012
Synoptic Discussion

Synoptic Discussion for August 2012

September 2012
Synoptic Discussion

Synoptic Discussion for September 2012

October 2012
Synoptic Discussion

Synoptic Discussion for October 2012

November 2012
Synoptic Discussion

Synoptic Discussion for November 2012

December 2012
Synoptic Discussion

Synoptic Discussion for December 2012

January 2013
Synoptic Discussion

Synoptic Discussion for January 2013

February 2013
Synoptic Discussion

Synoptic Discussion for February 2013

March 2013
Synoptic Discussion

Synoptic Discussion for March 2013

April 2013
Synoptic Discussion

Synoptic Discussion for April 2013

May 2013
Synoptic Discussion

Synoptic Discussion for May 2013

June 2013
Synoptic Discussion

Synoptic Discussion for June 2013

July 2013
Synoptic Discussion

Synoptic Discussion for July 2013

August 2013
Synoptic Discussion

Synoptic Discussion for August 2013

September 2013
Synoptic Discussion

Synoptic Discussion for September 2013

October 2013
Synoptic Discussion

Synoptic Discussion for October 2013

November 2013
Synoptic Discussion

Synoptic Discussion for November 2013

December 2013
Synoptic Discussion

Synoptic Discussion for December 2013

January 2014
Synoptic Discussion

Synoptic Discussion for January 2014

February 2014
Synoptic Discussion

Synoptic Discussion for February 2014

March 2014
Synoptic Discussion

Synoptic Discussion for March 2014

April 2014
Synoptic Discussion

Synoptic Discussion for April 2014

May 2014
Synoptic Discussion

Synoptic Discussion for May 2014

June 2014
Synoptic Discussion

Synoptic Discussion for June 2014

July 2014
Synoptic Discussion

Synoptic Discussion for July 2014

August 2014
Synoptic Discussion

Synoptic Discussion for August 2014

September 2014
Synoptic Discussion

Synoptic Discussion for September 2014

October 2014
Synoptic Discussion

Synoptic Discussion for October 2014

November 2014
Synoptic Discussion

Synoptic Discussion for November 2014

December 2014
Synoptic Discussion

Synoptic Discussion for December 2014

January 2015
Synoptic Discussion

Synoptic Discussion for January 2015

February 2015
Synoptic Discussion

Synoptic Discussion for February 2015

March 2015
Synoptic Discussion

Synoptic Discussion for March 2015

April 2015
Synoptic Discussion

Synoptic Discussion for April 2015

May 2015
Synoptic Discussion

Synoptic Discussion for May 2015

June 2015
Synoptic Discussion

Synoptic Discussion for June 2015

July 2015
Synoptic Discussion

Synoptic Discussion for July 2015

August 2015
Synoptic Discussion

Synoptic Discussion for August 2015

September 2015
Synoptic Discussion

Synoptic Discussion for September 2015

October 2015
Synoptic Discussion

Synoptic Discussion for October 2015

November 2015
Synoptic Discussion

Synoptic Discussion for November 2015

December 2015
Synoptic Discussion

Synoptic Discussion for December 2015

January 2016
Synoptic Discussion

Synoptic Discussion for January 2016

February 2016
Synoptic Discussion

Synoptic Discussion for February 2016

March 2016
Synoptic Discussion

Synoptic Discussion for March 2016

April 2016
Synoptic Discussion

Synoptic Discussion for April 2016

May 2016
Synoptic Discussion

Synoptic Discussion for May 2016

June 2016
Synoptic Discussion

Synoptic Discussion for June 2016

July 2016
Synoptic Discussion

Synoptic Discussion for July 2016

August 2016
Synoptic Discussion

Synoptic Discussion for August 2016

September 2016
Synoptic Discussion

Synoptic Discussion for September 2016

October 2016
Synoptic Discussion

Synoptic Discussion for October 2016

November 2016
Synoptic Discussion

Synoptic Discussion for November 2016

December 2016
Synoptic Discussion

Synoptic Discussion for December 2016

January 2017
Synoptic Discussion

Synoptic Discussion for January 2017

February 2017
Synoptic Discussion

Synoptic Discussion for February 2017

March 2017
Synoptic Discussion

Synoptic Discussion for March 2017

April 2017
Synoptic Discussion

Synoptic Discussion for April 2017

May 2017
Synoptic Discussion

Synoptic Discussion for May 2017

June 2017
Synoptic Discussion

Synoptic Discussion for June 2017

July 2017
Synoptic Discussion

Synoptic Discussion for July 2017

August 2017
Synoptic Discussion

Synoptic Discussion for August 2017

September 2017
Synoptic Discussion

Synoptic Discussion for September 2017

October 2017
Synoptic Discussion

Synoptic Discussion for October 2017

November 2017
Synoptic Discussion

Synoptic Discussion for November 2017

December 2017
Synoptic Discussion

Synoptic Discussion for December 2017

January 2018
Synoptic Discussion

Synoptic Discussion for January 2018

February 2018
Synoptic Discussion

Synoptic Discussion for February 2018

March 2018
Synoptic Discussion

Synoptic Discussion for March 2018

April 2018
Synoptic Discussion

Synoptic Discussion for April 2018

May 2018
Synoptic Discussion

Synoptic Discussion for May 2018

June 2018
Synoptic Discussion

Synoptic Discussion for June 2018

July 2018
Synoptic Discussion

Synoptic Discussion for July 2018

August 2018
Synoptic Discussion

Synoptic Discussion for August 2018

September 2018
Synoptic Discussion

Synoptic Discussion for September 2018

October 2018
Synoptic Discussion

Synoptic Discussion for October 2018

November 2018
Synoptic Discussion

Synoptic Discussion for November 2018

December 2018
Synoptic Discussion

Synoptic Discussion for December 2018

January 2019
Synoptic Discussion

Synoptic Discussion for January 2019

February 2019
Synoptic Discussion

Synoptic Discussion for February 2019

March 2019
Synoptic Discussion

Synoptic Discussion for March 2019

April 2019
Synoptic Discussion

Synoptic Discussion for April 2019

May 2019
Synoptic Discussion

Synoptic Discussion for May 2019

June 2019
Synoptic Discussion

Synoptic Discussion for June 2019

July 2019
Synoptic Discussion

Synoptic Discussion for July 2019

August 2019
Synoptic Discussion

Synoptic Discussion for August 2019

September 2019
Synoptic Discussion

Synoptic Discussion for September 2019

October 2019
Synoptic Discussion

Synoptic Discussion for October 2019

November 2019
Synoptic Discussion

Synoptic Discussion for November 2019

December 2019
Synoptic Discussion

Synoptic Discussion for December 2019

January 2020
Synoptic Discussion

Synoptic Discussion for January 2020

February 2020
Synoptic Discussion

Synoptic Discussion for February 2020

March 2020
Synoptic Discussion

Synoptic Discussion for March 2020

April 2020
Synoptic Discussion

Synoptic Discussion for April 2020

May 2020
Synoptic Discussion

Synoptic Discussion for May 2020

June 2020
Synoptic Discussion

Synoptic Discussion for June 2020

July 2020
Synoptic Discussion

Synoptic Discussion for July 2020

August 2020
Synoptic Discussion

Synoptic Discussion for August 2020

September 2020
Synoptic Discussion

Synoptic Discussion for September 2020

October 2020
Synoptic Discussion

Synoptic Discussion for October 2020

November 2020
Synoptic Discussion

Synoptic Discussion for November 2020

December 2020
Synoptic Discussion

Synoptic Discussion for December 2020

Annual 2020
Synoptic Discussion

Synoptic Discussion for Annual 2020

January 2021
Synoptic Discussion

Synoptic Discussion for January 2021

February 2021
Synoptic Discussion

Synoptic Discussion for February 2021

March 2021
Synoptic Discussion

Synoptic Discussion for March 2021

April 2021
Synoptic Discussion

Synoptic Discussion for April 2021

May 2021
Synoptic Discussion

Synoptic Discussion for May 2021

June 2021
Synoptic Discussion

Synoptic Discussion for June 2021

July 2021
Synoptic Discussion

Synoptic Discussion for July 2021

August 2021
Synoptic Discussion

Synoptic Discussion for August 2021

September 2021
Synoptic Discussion

Synoptic Discussion for September 2021

October 2021
Synoptic Discussion

Synoptic Discussion for October 2021

November 2021
Synoptic Discussion

Synoptic Discussion for November 2021

December 2021
Synoptic Discussion

Synoptic Discussion for December 2021

Annual 2021
Synoptic Discussion

Synoptic Discussion for Annual 2021

January 2022
Synoptic Discussion

Synoptic Discussion for January 2022

February 2022
Synoptic Discussion

Synoptic Discussion for February 2022

March 2022
Synoptic Discussion

Synoptic Discussion for March 2022

April 2022
Synoptic Discussion

Synoptic Discussion for April 2022

May 2022
Synoptic Discussion

Synoptic Discussion for May 2022

June 2022
Synoptic Discussion

Synoptic Discussion for June 2022

July 2022
Synoptic Discussion

Synoptic Discussion for July 2022

August 2022
Synoptic Discussion

Synoptic Discussion for August 2022

September 2022
Synoptic Discussion

Synoptic Discussion for September 2022

October 2022
Synoptic Discussion

Synoptic Discussion for October 2022

November 2022
Synoptic Discussion

Synoptic Discussion for November 2022

December 2022
Synoptic Discussion

Synoptic Discussion for December 2022

Annual 2022
Synoptic Discussion

Synoptic Discussion for Annual 2022

January 2023
Synoptic Discussion

Synoptic Discussion for January 2023

February 2023
Synoptic Discussion

Synoptic Discussion for February 2023

March 2023
Synoptic Discussion

Synoptic Discussion for March 2023

April 2023
Synoptic Discussion

Synoptic Discussion for April 2023

May 2023
Synoptic Discussion

Synoptic Discussion for May 2023

June 2023
Synoptic Discussion

Synoptic Discussion for June 2023

July 2023
Synoptic Discussion

Synoptic Discussion for July 2023

August 2023
Synoptic Discussion

Synoptic Discussion for August 2023

September 2023
Synoptic Discussion

Synoptic Discussion for September 2023

October 2023
Synoptic Discussion

Synoptic Discussion for October 2023

November 2023
Synoptic Discussion

Synoptic Discussion for November 2023

December 2023
Synoptic Discussion

Synoptic Discussion for December 2023

Annual 2023
Synoptic Discussion

Synoptic Discussion for Annual 2023

January 2024
Synoptic Discussion

Synoptic Discussion for January 2024

February 2024
Synoptic Discussion

Synoptic Discussion for February 2024

March 2024
Synoptic Discussion

Synoptic Discussion for March 2024

April 2024
Synoptic Discussion

Synoptic Discussion for April 2024

May 2024
Synoptic Discussion

Synoptic Discussion for May 2024

June 2024
Synoptic Discussion

Synoptic Discussion for June 2024

July 2024
Synoptic Discussion

Synoptic Discussion for July 2024

August 2024
Synoptic Discussion

Synoptic Discussion for August 2024

September 2024
Synoptic Discussion

Synoptic Discussion for September 2024

October 2024
Synoptic Discussion

Synoptic Discussion for October 2024

November 2024
Synoptic Discussion

Synoptic Discussion for November 2024

December 2024
Synoptic Discussion

Synoptic Discussion for December 2024

Annual 2024
Synoptic Discussion

Synoptic Discussion for Annual 2024

January 2025
Synoptic Discussion

Synoptic Discussion for January 2025

February 2025
Synoptic Discussion

Synoptic Discussion for February 2025

March 2025
Synoptic Discussion

Synoptic Discussion for March 2025

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