Tag Archive

Answers: Finding wind data

By Jack Williams ©2015

Q: What is your favorite source for near real time surface wind visualizations in the mid Atlantic region. I need the information for balloon flight planning in the field. Curt, Falls Church, Va. A:  I’ve yet to find any really good visualizations for surface winds because none show the winds in any real detail. That said,  best that I've found are NWS... »

Answers: Supercooled water

By Jack Williams ©2015

Q: How can water that is below 32 degrees F (zero degrees C) remain in liquid form and not freeze? That is, become "supercooled"? Matt, LaGrange, Ga. A: The best way to begin understanding how supercooled liquid water forms is to forgot what you've been told about water "freezing at 32 degrees F." This is really the temperature at which ice... »

Pilot answers: Upper air data and forecasts

By Jack Williams ©2015

Q: I use RUC soundings for flight planning, but I am befuddled by the following: When I enter a station, load the Op40 soundings, and hover with my mouse over the loaded graph I see  bold numbers on the far-left near the Pressure (mb) line, and light numbers appear directly underneath my cursor with a dynamic pink line drawn from... »

Aviation Contributes to Better Forecasts

By Jack Williams ©2015

This column originally appeared in the June 2005  issue of Flight Training Magazine. ©By Jack Williams and Flight Training Magazine.  All Rights Reserved Piecing together weather Aircraft weather data alphabet soup Here are some of the acronyms for aircraft weather data systems. ACARS: Aircraft Communication Ad-dressing and Reporting System, operated for the airlines by Aeronautical Radio Inc. (ARINC) -- the communications link between pilots... »