The Southwest Oklahoma Heat Bursts
of May 22-23, 1996
Case Study
Case Study Page
Event Data
Event Wrap-up

1.  Does the 0.5°F base reflectivity data from the KTLX radar correlate well with the 0.5°F base reflectivity from the KFDR radar between 7 p.m. and 7:15 p.m.? Would this knowledge enhance or diminish your confidence in the accuracy of the TLX radar products? Answer

2.  According to the meteogram, what is the air temperature for the Apache (APAC) mesonet site at 9 p.m.? Answer

3.  Does the value obtained in Question #2 correlate with the value shown for Apache at the same time on the color-filled contour map? What is the value indicated by the color-filled contour map? Answer

4. The Norman (NORM) mesonet station had about 0.08 inches of rainfall recorded from earlier yet it dropped to zero at 7 p.m. Why? Answer

5. What happens between 5:30 p.m. and 9:30 p.m. that causes temperatures to drop to 10 to 15 °F in most parts of the state? Answer

6. On the Hobart meteogram, note that the observed solar radiation is practically zero well before sunset. Thinking in terms of what you know to have occurred in the area between 6 p.m. and 9 p.m., explain the reason for the lack of sunlight. Answer

7.  Does the KTLX radar's 0.5 degree Base Reflectivity product show any reflectivity signals in Comanche and Kiowa counties between 8 p.m. and 10:30 p.m.? If so, are the signals strengthening or weakening with time? Answer

8.  How does the wind change in terms of speed and direction northeast of the radar echoes between 8 p.m. and 10:30 p.m.? Do you think that the winds are stronger than the maximum indicated by the legend at 10:30 p.m.? Answer

9.  Look at the meteogram for the Hobart (HOBA) mesonet station in central Kiowa County. What happens to the temperature, dewpoint temperature, wind, and pressure from 7 p.m. to 7:15 p.m.? Answer

10.  When does the meteogram for Ft. Cobb (FTCB) in west central Caddo County show a weather pattern similar to that observed at HOBA between 7 p.m. and 7:15 p.m.? Answer

11.  Does the difference in time between the similar weather pattern occurring in Hobart and Ft. Cobb (about 50 miles ENE of Hobart) make sense? Why or why not? Hint: Look at the peak winds for each station. Answer

12.  In which county is the center of the diverging winds in southwest Oklahoma located at midnight? Where are the radar echoes in relation to the center of diverging winds? Answer

13.  Is the dry air shown by the low dewpoint temperatures at midnight throughout the state aligned with the warm air temperatures? Answer

14.  In which general direction does the area of abnormally warm temperatures appear to move from 10 p.m. to 2:30 a.m.? Answer

15. Where is the dryline located at 10 p.m.? At 2 a.m.? Answer

16. Do you think that the movement of the dryline between 10 p.m. and 2 a.m. is typical? How so? Answer

17. What happens to the reflectivity patterns from Cotton through Comanche counties between midnight and 12:40 a.m.? Answer

18. With only the radar data as your guide, do you think that the air at WALT (Walters in Cotton County) at midnight is more or less humid than the air at KETC (Ketchum Ranch in Comanche County) at 12:40 a.m.? Answer

19.  Would you expect a stronger heatburst signal in the Mesonet plots at WALT or at KETC? Why do you think this is the case? Answer

20.  If the warm temperatures move into a new area after midnight, what do you think should happen to the dewpoint temperatures in the new area? Answer

21.  What happens to the TLX radar at approximately 1:35 a.m.? Can you explain why this happens? Answer

22.  What happens between 12:50 a.m. and 1:35 a.m. to radar echoes near the Ketchum Ranch (KETC) and Pauls Valley (PAUL) mesonet stations in Stephens and Garvin counties? Answer

23.  Is there any rain recorded at the KETC or PAUL sites between 12:50 a.m. and 1:35 a.m.? Answer

24.  If all you had to work with was the air temperature and dewpoint temperature data from the Ft. Cobb (FTCB) and Hobart (HOBA) stations, why was rainfall unlikely to occur- even though there were radar echoes nearby? Answer

25.  Which Mesonet sites measure rainfall between 7 p.m. to 2:30 a.m.? Answer

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