-	The upper level pattern remains largely unchanged with high pressure remaining in place across the Southern Rockies, while monsoonal moisture continues to rotate around the center of the high and stream into the District from the west. Temperatures will be hot again today with highs reaching the low to mid 90s on the plains.
-	Moisture has increased a bit from yesterday at both the mid level and low levels of the atmosphere, with dewpoints in the upper 40s to low 50s across the District this morning. Thunderstorms will initially fire over the foothills by early afternoon. The plains will likely be capped initially, but outflow from foothills activity should eventually trigger thunderstorms over the lower elevations by mid to late afternoon.
-	Thunderstorms will be slow-moving and erratic once again today, which will increase the potential for heavy rainfall under stronger storm cells. Steering flow will result in general storm motions from west to east about 5-10mph, but storms will have the potential to stall along outflow and wind convergence boundaries, resulting in a threat for both 0.5"/10 minute and 1"/hour rainfall rates. Storm activity should gradually decrease in coverage and intensity after sunset with the loss of daytime heating.

STORM RAINFALL POTENTIAL AND DURATION: Weak to moderate thunderstorms will produce rainfall amounts of 0.1-0.4" in 10-30 minutes. Strong thunderstorms will be capable of producing rainfall of 0.4-1.2" in 10-30 minutes.

WORST CASE SCENARIO: A strong thunderstorm stalls along an outflow or wind convergence boundary and produces heavy rainfall of up to 2.8" in 60-90 minutes.

A LOOK AHEAD: The pattern will remain similar on Monday and Tuesday with hot temperatures and scattered afternoon thunderstorms with moderate to heavy rainfall possible both days. A drier westerly flow aloft will take hold across the District over the second half of the week, resulting in reduced thunderstorm chances with minimal if any heavy rainfall threat.