Atmospheric gravity waves, known as undular bores, are waves in Earth’s atmosphere that often show up quite well on satellite and radar imagery. They are notorious for creating wave-like clouds, which clearly propagate as waves when viewed in rapid time-lapse photography. Low-level atmospheric stability is implicated in the formation of undular bores. Large static stability […]
On May 25th, 2016, a large and violent, long-track tornado tore through the landscape across north-central Kansas causing extensive damage along Interstate 70 between Abilene and Chapman, Kansas. What was a marginal day for severe weather ended up producing one of the most violent tornadoes of the 2016 season. We visited Chapman on Saturday, July 23rd, […]
Definition of Heat Index: The heat index is an estimate of how hot the air “feels” to the human body and provides a relative indication of potential health risks. Among others, the two primary factors in the heat index equations are temperature and water vapor (i.e., moisture/humidity). Humidity affects the efficacy of perspiration to evaporatively […]
The fall (autumnal) equinox will occur on Thursday, September 22, 2017 at 20:02 UTC. In the U.S., at 4:02 pm EDT, 3:02 pm CDT, 2:02 pm MDT, and 1:02 pm PDT. In the Southern Hemisphere, it will be the start of spring. The total duration of autumn 2017 is 89 days, 19 hours, and 26 […]
Interesting rainfall tidbits from the deluge in the Metroplex on Monday 7/4/16 The total rainfall at DFW Airport on the 4th of July 2016 was 3.20″ This shattered the daily record for 7/4 by 141% (previous record: 1.31″ in 2006) Compared with the entire month of July, as well as June + July… It ranked […]