31 jul1976 0000 GMT 500mb Analysis L=350 1-pass Analytic Approximation Published July 29, 2016 at 1001 × 701 in The Big Thompson Storm:Weather Patterns 2 Fig. 1 An analysis of temperature (°C) and height field of the 500 mb pressure surface over the US West for 31 jul1976 0000 GMT (6:00 PM, MDT). Dew points temperatures closer to the temperature of 6 °C are shaded green.