http://www.weatherjackwilliams.com science writer and book author Fri, 02 Dec 2011 20:18:46 +0000 en hourly 1 http://wordpress.org/?v=abc http://www.weatherjackwilliams.com/archives/answers-heating-cooling-degree-days http://www.weatherjackwilliams.com/archives/answers-heating-cooling-degree-days#comments Wed, 11 May 2011 00:47:57 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=2515 http://www.weatherjackwilliams.com/archives/answers-heating-cooling-degree-days/feed 2 http://www.weatherjackwilliams.com/archives/answers-hurricane-rainbands http://www.weatherjackwilliams.com/archives/answers-hurricane-rainbands#comments Fri, 06 May 2011 22:05:13 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=2504 Q: Cross-cut figures of hurricanes show a structure like a jelly roll turned on end and sliced through the middle.  Are these rings all connected in a continuous spiral or are they multiple rings? (I suspect they are continuous.) Also, how do they develop in the evolution of a hurricane? That is, why isn’t the hurricane [...]]]> http://www.weatherjackwilliams.com/archives/answers-hurricane-rainbands/feed 0 http://www.weatherjackwilliams.com/archives/answers-finding-wind-data http://www.weatherjackwilliams.com/archives/answers-finding-wind-data#comments Sun, 26 Dec 2010 20:47:40 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=2348 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 [...]]]> http://www.weatherjackwilliams.com/archives/answers-finding-wind-data/feed 0 http://www.weatherjackwilliams.com/archives/answers-supercooled-water http://www.weatherjackwilliams.com/archives/answers-supercooled-water#comments Wed, 17 Nov 2010 03:42:14 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=2255 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 [...]]]> http://www.weatherjackwilliams.com/archives/answers-supercooled-water/feed 8 http://www.weatherjackwilliams.com/archives/answers-arizona-tornadoes http://www.weatherjackwilliams.com/archives/answers-arizona-tornadoes#comments Tue, 22 Jun 2010 17:47:00 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=2103 Q: Do tornadoes occur in south-west Arizona, including in the Yuma area? Chris,  Yuma, Ariz. A: A few tornadoes have occurred in Yuma County in the past, which means that they can  occur in the future. Nevertheless, the record shows they are rare and usually weak. If  you go to the National Climatic Data Center’s [...]]]> http://www.weatherjackwilliams.com/archives/answers-arizona-tornadoes/feed 3 http://www.weatherjackwilliams.com/archives/answers-ams-weather-book-supplementary-texts http://www.weatherjackwilliams.com/archives/answers-ams-weather-book-supplementary-texts#comments Sun, 09 May 2010 16:03:26 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=2021 http://www.weatherjackwilliams.com/archives/answers-ams-weather-book-supplementary-texts/feed 0 http://www.weatherjackwilliams.com/archives/pilot-answers-upper-air-data-and-forecasts http://www.weatherjackwilliams.com/archives/pilot-answers-upper-air-data-and-forecasts#comments Tue, 27 Apr 2010 16:29:35 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=1995 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 [...]]]> http://www.weatherjackwilliams.com/archives/pilot-answers-upper-air-data-and-forecasts/feed 3 http://www.weatherjackwilliams.com/archives/when-seasons-begin-revistited http://www.weatherjackwilliams.com/archives/when-seasons-begin-revistited#comments Thu, 01 Apr 2010 16:06:51 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=1933 Q: Hello Jack. I was wondering if anyone ever turned in an answer on your “official seasons” proposal from last summer. I am doing my senior research project on the seasons, and would like to know what you found out. Thank you for your time. Justin, Redwood Falls, MN A: The question refers to an [...]]]> http://www.weatherjackwilliams.com/archives/when-seasons-begin-revistited/feed 1 http://www.weatherjackwilliams.com/archives/answers-weather-balloons-and-airplanes http://www.weatherjackwilliams.com/archives/answers-weather-balloons-and-airplanes#comments Tue, 23 Feb 2010 01:04:36 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=1855 Q: Hi, I enjoyed “Rise Up” in the March 2010 AOPA Flight Training magazine.   I wonder about  the danger of those weather balloons and noted your  comments about there being “no danger” as it’s floating down under parachute. But really, hasn’t there ever been an incident or accident associated with one of these balloons [...]]]> http://www.weatherjackwilliams.com/archives/answers-weather-balloons-and-airplanes/feed 3 http://www.weatherjackwilliams.com/archives/answers-wind-direction http://www.weatherjackwilliams.com/archives/answers-wind-direction#comments Sat, 23 Jan 2010 04:11:43 +0000 Jack Williams ©2011 http://www.weatherjackwilliams.com/?p=1739 Q: In your article in the January 2010 issue of AOPA Flight Training, you say: “If the lines on a weather map showing air pressures of 500 millibars and 496 millibars were straight and parallel, the PGF and Coriolis forces would soon balance and the wind would flow parallel to the lines of equal atmospheric [...]]]> http://www.weatherjackwilliams.com/archives/answers-wind-direction/feed 1