First Alert Weather June 21, 2021 2:39 pm Tracking Stormy Threat for Monday Night First Alert: NBC10’s Krystal Klei is tracking storms that bring damaging threats to Philadelphia and points north and west later on Monday. Here is what you need to know about the First Alert. US & World Videos 3:21 Rain and stormy weather is likely for Thursday 3:02 Showers in the forecast for Memorial Day weekend 2:26 A summerlike day with highs in the 80s 2:27 Feeling like summer again 2:16 Feeling the heat heading into Memorial Day Weekend, but tracking storms along the way