Quote:
Originally Posted by CandyApple  I have a question, though: Where/what is the "dry line"? |
From
the NOAA:
"A boundary called a
dry line is usually present across west Texas. The dry line is a boundary separating a warm, moist air mass [from the Gulf of Mexico] and a warm, dry air mass [from the Chihuahuan Desert]. Daytime heating combined with this boundary will lead to thunderstorm development occasionally, especially during the spring and early summer when upper level dynamics are most favorable. This line of thunderstorms will generally form near
the dry line - west of the Dallas/Fort Worth Metroplex - during the early to mid afternoon hours. The line of thunderstorms will generally track eastward and affect the Dallas area during the mid to late afternoon, and then affect east Texas during the evening hours if they hold together. This might explain why it seems that east Texas experiences severe weather after nightfall, but the Dallas area in the afternoon."
The dry line wanders around seasonally, but you can sure see the stark contrast between east and west Texas on any
precipitation map. Summers can be miserably humid east of the dry line.