Are you a forecaster who wants to know everything about upper-air observations, radiosondes,
skew-T's, hodographs, and severe weather indices?
Your holy grail is finally here!

Released in 2017 *Instability, Skew-T, and Hodograph Handbook*
provides a full background on working with skew-T diagrams and hodographs.
Math is kept to an absolute minimum, the text has a friendly tone, and the information starts
out simple and then builds on the existing text.
Learn how these diagrams work, what all the lines mean and how to use the charts.
Nearly every known severe weather index is covered, including newer parameters like
Significant Tornado Parameter and Critical Angle.
Informative notes in the margin help clarify the material and provide related historical and technical background.
Each chapter has a summary section and and 20 questions.

**Chapters on skew-T diagrams and hodographs**

The book starts out with a chapter on thermodynamics, followed by a grounding in observing systems,
then proceeds to working with skew-T's and hodographs. The charts are explained in detail, with
numerous case studies and forecaster notes.

**Severe weather index spreads**

For 23 of the most heavily used severe weather indexes, there is a two-page spread. This provides
a definition of the index, how it was developed, the range of units that are typical for severe
weather situations, and samples for about 15 recent tornado outbreaks,
This makes an excellent go-to desk reference for anyone working up a severe weather prediction or a chase forecast.

Instability, Skew-T, and Shear Handbook is designed for forecasters, hobbyists,
undergraduate college students, and anyone who wants to learn more.

**Forecasters Reference Workbook** is the companion to this title,
and will help you work through its material or apply what you've learned to your forecasts.

Additionally, our **laminated skew-T log-p diagram**, with
reference info authored by Tim Vasquez on the back, is a useful tool to accompany this book.

### About the author

Tim Vasquez began a meteorology career in 1984 writing the weather page for a Dallas newspaper. From 1989 to 1998 he was an Air Force meteorologist and worked at two television stations. He developed the Digital Atmosphere weather analysis software system in use worldwide. Residing in Texas, he is a software programmer, a consulting meteorologist, and a columnist for Weatherwise magazine.

Contents
1 | Thermodynamics / 11.1. The parcel / 1 1.2. Altitude / 1 1.3. Pressure / 3 1.4. Physical units / 6 1.5. Heat / 7 1.6. Phases of matter / 14 1.7. Phase changes / 15 1.8. Temperature / 16 1.9. Water / 19 1.10. The saturation process / 21 1.11. Moisture properties / 25 1.12. Troposphere and stratosphere / 28 2 | Observing systems / 352.1. History / 35 2.2. Balloons / 37 2.3. Pilot balloon / 38 2.4. Modern radiosondes / 39 2.5. Radar velocity data / 52 2.6. Wind profiler / 53 2.7. AMDAR / ACARS / MDCRS / 54 3 | Skew-T log-p diagram / 593.1. The skew-T log-p chart / 61 3.2. Construction of the skew-T / 61 3.3. Meteorological data / 64 3.4. Static stability and lapse rate / 66 3.5. Lifting / 73 3.6. Basic parcel properties / 76 3.7. Proximity sounding / 81 3.8. Parcel techniques / 82 3.9. Virtual temperature / 88 3.10. Dryline / 89 3.11. Capping inversion / 93 4 | Shear & hodographs / 994.1. Hodograph / 99 4.2. Shear / 100 4.3. Hodograph quantities / 103 4.4. Storm motion / 109 4.5. Storm-relative frame / 112 4.6. Shear and storm forecasting / 113 4.7. Helicity / 117 |
5 | Severe storm forecasting / 1235.1. Storm types / 123 5.2. Elements / 125 5.3. Shear and instability / 128 5.4. The trigger / 132 5.5. Patterns / 132 APPENDIX / 141A-1 -- Severe weather indices / 141 A1.1. The use of prediction schemes / 141 A1.2. Case study values / 142 A-2 -- SHARPpy / 195 A2.1. About SHARPpy / 195 A2.2. Concept of operation / 196 A2.3. Hodograph / 199 A2.4. Storm slinky / 199 A2.5. Equiv. potential temp. profile / 201 A2.6. Storm-relative wind profile / 203 A2.7. Possible Hazard Type / 204 A2.8. Thermodynamic output / 205 A2.9. Shear output / 208 A2.10. Sounding analogs (SARS) / 209 A2.11. Significant Tornado Parameter (STP) / 209 A-3 -- RAOB / 213 A3.1. Data import / 213 A3.2. RAOB soundings / 214 A3.3. RAOB hodograph / 216 A3.4. Cross section / 216 A3.5. Other features / 216 A-4 -- Other resources / 219 A4.1. University of Wyoming / 219 A4.2. UCAR weather / 220 A4.3. Storm Prediction Center / 221 A4.4. PivotalWeather.com / 222 A4.5. ESRL RUC Soundings site / 223 A-5 -- Radiosonde data / 225 A-6 -- Glossary / 229 References / 233 Index / 239 |