Areas of Severe Thunderstorms and Excessive Rainfall through This Weekend

A multi-day thunderstorm and heavy rain event will impact the south-central U.S. this Memorial Day weekend. Severe thunderstorms may produce large hail, severe gusts, and a possible tornado or two across portions of the central and southern Plains through Monday. The threat for heavy to excessive rainfall and possible flash flooding will return to the south-central U.S., especially in the Ozarks. Read More >

2020 Climate Summaries

Top 5 Weather Events

Casper

Lander

Riverton

Click Here for the complete 2020 summary for Casper

...Highlights of 2020...

Annual: 1st driest year on 81 years of record (1939-2020), with just 46.2 percent of normal precipitation, 20th snowiest year on record with 119 percent of normal annual snowfall. Highest wind gust was 75 mph on January 4th.

Monthly Temperatures: 10th coldest October on record.

Monthly Precipitation: 1st driest May (tie), 1st driest July, 4th driest August and 1st driest November (tie) on record.

Monthly Snowfall: 1st snowiest February and 4th snowiest September on record.

Click Here for the complete 2020 summary for Lander

...Highlights of 2020...

Annual - 22nd warmest year at 45.8 degrees with 129 years of record (1892-2020).
5th Driest year on record with 53% of normal precipitation.
67th Snowiest year on record with 84.1 inches (92 percent of normal).
The peak wind gust for the year was 70 mph which occurred on November 7th.

Monthly Temperature: 3rd warmest August on record at 73.3 degrees (tie).

Monthly Precipitation: 1st Driest May (tie) with 0.06 inches, and 6th driest August with a 0.05.

Monthly Snowfall: 4th least snowiest November (tie) with a trace.

Click Here for the complete 2020 summary for Riverton

...Highlights of 2020...

Annual: Average temperature just 0.3 degrees below normal in 2020. Much drier than normal precipitation, with only 67 percent of normal. Above average snowfall, with 166 percent of normal.

Average annual temperature 44.2 degrees was the 33rd coldest year on 103 years of record (1918-2020).

2020 precipitation total was 5.62 inches which was the 7th driest year on 103 years of record (1918-2020).

2020 snowfall total was 61.7 inches which was the 5th snowiest year on 103 years of record .

Seasonal: The 2019-2020 Seasonal Snow total was 66.7 inches, the 4th snowiest season on record.

Monthly Temperatures: 6th warmest August on record.

Monthly Precipitation: 4th wettest February on record. 8th driest May (tie), 6th driest August, and 8th driest November (tie) on record.

Monthly Snowfall: 2nd snowiest February, 7th snowiest April and 7th snowiest September on record.

Top 5 Events of 2020 (video presentations):


Number 5: Early February Snowstorm	Number 4: Lack of Thunderstorms / Precipitation

Number 3: Late October Snow and Record Cold	Number 2: June 6th Derecho

And the number one event of 2020 was...

Number 1: Labor Day Weekend Snow / Windstorm

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Areas of Severe Thunderstorms and Excessive Rainfall through This Weekend

2020 Annual Climate Summary