A Closer Look at What Happened in Texas During the Deep Freeze:
Chris Martz Chris Martz
“By failing to prepare, you are preparing to fail.â€
— Benjamin Franklin
Meteorological Analysis
Three weeks ago, a major cold snap and series of winter storms enveloped the southern plains and parts of the Mississippi River Valley, sending temperatures below zero as far south as central Texas. According to NOAA NCEI, a total of 8,632 daily record low temperatures — including both maximums and minimums — were set or tied from February 10-20, as opposed to only 262 daily warm records.¹ Additionally, a whopping 693 monthly record lows were set, 199 of which were all-time record lows. According to the NOAA Weather Prediction Center, over 30% of all of the official weather stations in the United States set at least record low maximum temperatures between February 14 and 16. Without a doubt, this was the coldest 10-day period that this part of the country had experienced in over a century. The animation below conveys just how widespread the cold was between February 10 and 20 (Figure 1).²
Figure 1. Locations approaching or surpassing daily, monthly, and/or all-time record lows; February 10-20, 2021 – coolwx.com.
While no statewide records were broken, some of the records that were reported were quite shocking to say the least. The two coldest days were Monday, February 15 and Tuesday, February 16, where temperatures were some 40-50°F below average across Oklahoma and Texas. Between February 11 and 18, temperatures across much of the Heartland averaged some 30°F below average (Figure 2).³ Temperatures this cold for such a sustained period can lower the monthly and seasonal average by a wide margin.
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