This is a #map of a weather model (the N.A.M) showing current conditions:

sifted-in dry air with low relative #humidity is clashing with a big streak of warm and humid tropical air right over central #Texas.

Bright orange is "very dry" air and bright blue is "very humid" atmosphere. When the isobars / pressure lines get all scrunched up together in the shape of a "hook echo" all #hail breaks loose, huge lightning, baseball sized hail, #tornado likely and overall atmospheric instability.

#Weather #Meteorology