Here's a short list of links, several of which are on the Boquete Weather list, that may be of interest to you.

• Accuweather
• Weather Underground
• National Weather Service (from NOAA)
• Department of Meteorology Weather for Panama (in Spanish, with some English terms)
• Multimap weather for Chiriqui (A map of Chiriqui is at the top of the page. Scroll down for forecast.)

• Climate (Wikipedia)
• World Climates
• Weather (Wikipedia)
• Wind - The Beaufort Scale (Wikipedia)
• Rain (Wikipedia)
• Humidity (Wikipedia)
• Dew point (Wikipedia)

• El Niño - Basic Introduction - University of Illinois
• El Niño-Southern Oscillation - ENSO (Wikipedia)
• El Niño and Panama Weather - [from A Neotropical Savanna Blog]
  • Part 1: Precipitation Observations
  • Part 2: The Doldrums
  • Part 3: How El Niño affects Rainfall

• Inter Tropical Convergence Zone (Wikipedia)