| Date Time MST |
Temp °F |
RH % |
DewPt °F |
Wind mph |
Dir ° |
Gust mph |
Dir ° |
Press in Hg |
Solar W/m^2 |
Prec in |
|---|---|---|---|---|---|---|---|---|---|---|
| 2021-04-19 20:45 | 21.0 | 94.5 | 19.7 | 3.4 | 316 | 5.0 | 323 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 20:40 | 21.0 | 94.5 | 19.7 | 3.8 | 322 | 4.8 | 324 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 20:35 | 21.0 | 94.4 | 19.6 | 4.0 | 333 | 4.8 | 323 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 20:30 | 21.0 | 94.6 | 19.7 | 4.5 | 307 | 6.4 | 316 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 20:25 | 20.9 | 94.6 | 19.6 | 4.1 | 311 | 5.7 | 336 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 20:20 | 21.0 | 94.7 | 19.7 | 5.0 | 341 | 6.6 | 326 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 20:15 | 20.9 | 94.8 | 19.7 | 4.9 | 336 | 5.9 | 331 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 20:10 | 20.9 | 94.6 | 19.6 | 6.6 | 332 | 8.2 | 337 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 20:05 | 21.0 | 94.7 | 19.7 | 6.9 | 332 | 8.8 | 332 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 20:00 | 21.0 | 94.5 | 19.6 | 9.0 | 332 | 11.7 | 338 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 19:55 | 21.1 | 94.8 | 19.9 | 9.0 | 337 | 11.3 | 339 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 19:50 | 21.2 | 94.9 | 19.9 | 9.4 | 329 | 11.2 | 335 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 19:45 | 21.2 | 94.9 | 20.0 | 8.8 | 338 | 11.2 | 328 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 19:40 | 21.4 | 95.3 | 20.2 | 8.5 | 323 | 10.6 | 321 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 19:35 | 21.4 | 95.3 | 20.2 | 7.4 | 322 | 8.8 | 330 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 19:30 | 21.4 | 95.1 | 20.2 | 7.9 | 334 | 9.0 | 336 | 0.000 | 0.0 | 0.00 |
| 2021-04-19 19:25 | 21.4 | 95.3 | 20.3 | 6.5 | 325 | 7.8 | 345 | 0.000 | 0.0 | 0.00 |
| 2021-04-19 19:20 | 21.4 | 95.3 | 20.3 | 8.4 | 349 | 9.6 | 342 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 19:15 | 21.5 | 95.4 | 20.4 | 8.0 | 342 | 10.3 | 354 | 0.000 | 0.0 | 0.00 |
| 2021-04-19 19:10 | 21.5 | 95.3 | 20.3 | 9.0 | 353 | 11.1 | 352 | 0.000 | 0.1 | 0.00 |
| 2021-04-19 19:05 | 21.6 | 95.4 | 20.5 | 9.3 | 347 | 11.6 | 345 | 0.000 | 0.2 | 0.00 |
| 2021-04-19 19:00 | 21.6 | 95.4 | 20.5 | 10.9 | 355 | 13.2 | 2 | 0.000 | 0.3 | 0.00 |
| 2021-04-19 18:55 | 21.8 | 95.5 | 20.8 | 11.3 | 359 | 13.9 | 359 | 0.000 | 0.6 | 0.00 |
| 2021-04-19 18:50 | 22.0 | 95.5 | 20.9 | 12.3 | 1 | 15.0 | 353 | 0.000 | 0.6 | 0.00 |
| 2021-04-19 18:45 | 22.2 | 95.6 | 21.2 | 12.3 | 348 | 14.7 | 342 | 0.000 | 1.2 | 0.00 |
| 2021-04-19 18:40 | 22.3 | 95.7 | 21.3 | 10.7 | 332 | 15.3 | 332 | 0.000 | 2.1 | 0.00 |
| 2021-04-19 18:35 | 22.3 | 95.7 | 21.3 | 10.6 | 336 | 13.2 | 351 | 0.000 | 2.5 | 0.00 |
| 2021-04-19 18:30 | 22.4 | 95.7 | 21.3 | 10.1 | 339 | 12.3 | 338 | 0.000 | 3.2 | 0.00 |
| 2021-04-19 18:25 | 22.4 | 95.7 | 21.4 | 9.5 | 323 | 11.8 | 333 | 0.000 | 4.0 | 0.00 |
| 2021-04-19 18:20 | 22.5 | 95.7 | 21.5 | 8.8 | 329 | 11.5 | 339 | 0.000 | 4.6 | 0.00 |
Bernhard Haurwitz (1905-1986) was a member of our faculty for 13 years, teaching atmospheric dynamics and doing research on atmospheric tides. He was a pioneer in the study of tropical cyclone dynamics, writing papers on this subject before satellites, weather radars, and aircraft observations. He is also known for his analysis of “Rossby-Haurwitz waves.”
After a review of some of Bernhard’s contributions, the talk will focus on the potential vorticity aspects of tropical systems, especially tropical cyclones. We will try to understand how a tropical cyclone can become a hollow PV tower with values of PV exceeding 200 PV units. We will also discuss the role of the frictional boundary layer in establishing the eyewall and often a concentric eyewall, and also the role of barotropic instability in the breakdown of eyewall structures.