| where the winds take us! Homework! An Asheville | | | | welcomed as we navigate congested terrain in |
| hot air balloon pilot must spend a lot of time | | | | search of favorable landing options. |
| reviewing current and forecast winds and weather. | | | | What are these wind flow characteristics you may |
| The study of surface analysis charts, wind surface | | | | wonder? Mountains will act as shield's changing the |
| charts and constant pressure charts helps us develop | | | | direction and speed of approaching winds. We'll use |
| a complete weather picture. Taking that weather | | | | these mountain shields to gain favorable direction |
| picture in our mind and applying it to an array of | | | | below the ridge line. When we're ready for a push |
| different topographical maps sheds light on how | | | | down or across the valley in a slightly different |
| winds might behave in and around the mountains. All | | | | direction we'll ascend above the ridge line to pick up |
| of this information accompanies us to the launch site | | | | faster moving winds traveling in a different direction. |
| the morning of the flight. From the launch site we | | | | Often we'll experience venturi winds as well. |
| release two sometimes three helium balloons in one | | | | Venturi winds occur when wind is forced between |
| minute intervals and observe the angle of departure | | | | two objects like buildings or a cut away portion of a |
| and any changes in direction. | | | | ridge. These cut aways are generally to make way |
| We also time these helium balloons knowing the | | | | for an interstate. Another great example of where |
| balloons are ascending at three hundred feet per | | | | you will find venturi winds is in a gorge or a canyon. |
| minute that in three minutes time the observed | | | | Venturi winds are almost always, from day to day, |
| balloon is at nine hundred feet above ground level. | | | | traveling in the same direction. On a regular basis we'll |
| We then note the elapsed time of an observed | | | | descend into a venturi wind and let that current of |
| direction change and know to fly to that altitude and | | | | wind push our direction laterally for a couple of |
| maintain level flight for as long as we want to | | | | minutes we then simply ascend out of it and resume |
| continue in that direction. Field observations are | | | | our original heading! As you gain experience flying in |
| generally supporting an already held belief of what is | | | | the mountains and develop sensitivity to where |
| going on in the atmosphere that morning. Supporting | | | | venturi wind currents are and you learn to use them |
| our day to day research of weather conditions are | | | | to your advantage you can really steer one of those |
| understandings of the characteristics of wind and | | | | Asheville hot air balloons! But wait there are more |
| mountain. | | | | ways than just wind to steer a balloon. |
| As you might imagine the relationship of wind and | | | | Sometimes we use the tree tops to get a little pull in |
| mountain create an interesting number of wind flow | | | | a new direction. It's simple really; just reach out grab |
| characteristics. Winds pertaining to or affected by | | | | some leaves and pull and you'll get a little change in |
| mountains are referred to as orographic winds. | | | | direction. Trees change the flow of winds and |
| Asheville hot air balloons and ballooning are a different | | | | correctly anticipating wind current characteristics at |
| from flatter parts of the country in that the wind | | | | tree top level will help you that much more in your |
| characteristics in and above the valleys offer us | | | | pursuit of a nice big field to land in. Asheville hot air |
| steerage opportunities that may not exist in flatter | | | | balloons take advantage of all of mother natures |
| terrains. These steerage opportunities are most | | | | gifts. |