PPT Slide
Trend and Expectancy Guidelines
Adjustments amounts DOWNWARD if:
The trend of the last 3 half-hourly estimates is downward
The speed of the coldest tops increasing
The time of day is becoming unfavorable
The system is moving into a different topographic region that is less moist and more stable
The warm, moist, low-level inflow points in the same direction as, and becomes increasingly parallel to the direction of movement of the coldest tops
Hourly surface data show low-level inflow decreasing in dewpoints, precipitable water, or increasing in stability