Squall line will deliver 1-2″ of heavy rain Sunday evening

A powerful cold front will push through the Washington Area on Sunday evening. A Squall Line (strong line of thunderstorms with very heavy rain and gusty winds) will likely be … Continue reading Squall line will deliver 1-2″ of heavy rain Sunday evening

Flash Flooding & Severe Thunderstorms Possible Across Parts of the Mid-Atlantic on Monday

The last few runs of the high-resolution North American Model (NAM) continue to outline thunderstorms capable of dropping copious amounts of rain in a short period of time on Monday.  … Continue reading Flash Flooding & Severe Thunderstorms Possible Across Parts of the Mid-Atlantic on Monday

Historic Flooding Likely Across Portions of the DC Region: Turn Around Don’t Drown!

Flash Flood Watch in effect through Sunday for good reason as PWATS increase above 2.5″ this afternoon into this evening. Strong frontogenetic forcing (strong upward lift at the surface), along … Continue reading Historic Flooding Likely Across Portions of the DC Region: Turn Around Don’t Drown!

Severe Thunderstorms Possible Thursday, Torrential Rain & Flooding Possible Friday

The image below shows radar estimates of the amount of rain that has fallen across the Washington Region during the past seven days. An area of low pressure will approach … Continue reading Severe Thunderstorms Possible Thursday, Torrential Rain & Flooding Possible Friday