Background: When the subtropical ridge in the Northwest Pacific is stronger than normal, it leads to a wet monsoon season for Asia.[18] The subtropical ridge position is linked to how far northward monsoon moisture and thunderstorms extend into the United States. Typically, the subtropical ridge across North America migrates far enough northward to begin monsoon conditions across the Desert Southwest from July to September.[19] When the subtropical ridge is farther north than normal towards the Four Corners, monsoon thunderstorms can spread northward into Arizona. When suppressed to the south, the atmosphere dries out across the Desert Southwest, causing a break in the monsoon regime.[20]

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which month of the year was drier, July 2018 or July 2019?
Answer: July 2019

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which month of the year was wetter, July 2018 or July 2019?
Answer: July 2018

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which month of the year was wetter, August 2018 or August 2019?
Answer: August 2018

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which month of the year was drier, August 2018 or August 2019?
Answer: August 2019

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which month of the year was drier, September 2018 or September 2019?
Answer: September 2019

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which month of the year was wetter, September 2018 or September 2019?
Answer: September 2018

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which year did the subtropical ridge move farther north?
Answer: 2018

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which year did the subtropical ridge move less farther north than normal?
Answer: 2019

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which year was the subtropical ridge suppressed to the south?
Answer: 2019

Situation: 2018 was a very wet year for the Four Corners area,  because of the subtropical ridge, 2019, on the other hand was a dry year influenced by the same weather phenomenon that lacked strength in this year.

Question: Which year was there a break in the monsoon regime?
Answer: 2019

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which month of the year was wetter, July 2017 or July 2016?
Answer: July 2016

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which month of the year was wetter, July 2017 or June 2017?
Answer: July 2017

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which month of the year was drier, July 2017 or June 2017?
Answer: June 2017

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which month of the year was drier, July 2017 or June 2016?
Answer: July 2017

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which month of the year was drier, July 2017 or August 2016?
Answer: July 2017

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which month of the year was drier, July 2017 or September 2016?
Answer: July 2017

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which month of the year was drier, July 2017 or October 2016?
Answer: July 2017

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which year had more fires because of drought, 2017 or 2016?
Answer: 2017

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which year had more less because of drought, 2017 or 2016?
Answer: 2016

Situation: In 2016, the subtropical ridge across North America migrated far enough northward to begin monsoon conditions across the Desert Southwest from July to September, but in 2017 the atmosphere dried out across the Desert Southwest, causing a break in the monsoon regime. Therefore a wet year was followed buy a dry one, and the fires started again.

Question: Which month of the year was drier, September 2017 or August 2016?
Answer: September 2017