Thursday, October 16, 2014

Crepuscular rays

Crepuscular rays shine down on the Wasatch. According to Wikipediacrepusculum is latin for twilight, and you usually see this optical phenomenon near sunrise or sunset. There is an optical illusion here. Though the sun's rays look like they converge at a point the rays are actually parallel, much like the train tracks shown below. The rails look like they converge at some distant point, but they are really parallel (otherwise a train would have a difficult time going anywhere). 

National Land Cover Database

One important input to weather models is the land cover. For future reference, here is a link to the 2006 National Land Cover Database: http://www.mrlc.gov/nlcd06_data.php


Wednesday, October 15, 2014

Sounding Climotology

A new tool developed by the Storm Prediction Center allows you to look at the climatology of sounding data for any of the radiosonde sites. Below shows the 700 mb temperatures. On the website you can look at climatology of any other variable from sounding data.
http://www.spc.noaa.gov/exper/soundingclimo/

Source: SPC

Tuesday, October 14, 2014

Friday, October 10, 2014

Timpanogos Fall Color

The fall colors are at their peak. Here is a view of Timpanogos. Looks like a great weekend for a hike :) A high amplitude ridge will build during the weekend to keep these October temperatures in the 70's! I'm hoping the ridge persists throughout the fall break.

NAM forecast for Monday Noon: