High Pressure Records Broken in the Plains
A huge high pressure system that was responsible for bringing the coldest air of the season to the U.S. this week broke all-time pressure records in the Plains. The first two records I found were these:
- Omaha, NE: 1055.3 or 31.16" Hg @ KOMA (previous record 31.12" on 12/22/1989)- Sioux Falls, SD: 1054.5 or 31.14" Hg @ KFSD (previous record 31.12 3/11/1998)
The NWS is quoted in this article as saying that records were also broken at Grand Island, Nebraska; Topeka and Concordia, Kansas; Bismarck, North Dakota; Sioux City, Iowa; and Huron, South Dakota. Amateur records were also broken at O'Fallon and Creve Coeur, Missouri.
The spike showed up well on CoolWx.com's 1-week graph of national extremes and averages; I also saved off their U.S. Pressure map.
NOTES: Omaha: KMLE was down; KOFF had a slightly lower pressure maximum; other sources listed Omaha's previous record as 31.07 on 1/25/1905. Sioux Falls would not be a state record due to Rapid City having a past record of 31.15". Wednesday’s record broke the old one set on Dec. 22, 1989, at 1053.7 millibars.
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