Hold any mouse button down as you move the cursor over west central Texas on the large 6.7 micron water vapor image. The corresponding 3.9 micron shortwave IR image (inset) shows that a deck of low stratus cloud (lighter gray enhancement) lags behind the leading edge of the surface cold front. Surface temperatures (F) are plotted in red. Note the dark "hot spot" on the shortwave IR image, from a fire that was burning just ahead of the leading edge of the advancing stratus cloud deck.