Low, Middle, and High Cloud Cover or Relative Humidity at 800mb, 500mb, and 300mb

• Light blue shaded areas show where low level cloud cover exceeds 50%. For the analysis, cloud cover is not available so relative humidity > 70% at 800mb is used as a proxy.
• Light green shaded areas show where middle level cloud cover exceeds 50%. For the analysis, cloud cover is not available so relative humidity > 70% at 500mb is used as a proxy.
• Pink shaded areas show where high level cloud cover exceeds 50%. For the analysis, cloud cover is not available so relative humidity > 70% at 300mb is used as a proxy.