Special update: Severe weather outbreak over the NE US today
There is a likely decent sized severe weather event in the Northeast US later today. This is the same system that produced severe weather in the Ohio Valley yesterday. The SPC has issued a moderate risk of severe weather for parts of the NE including NYC and Philadelphia. They also have a enhanced tornado threat today in those same areas. There will be 2 types of tornado threats today. One will be from discrete supercells that form out in front of the squall line and brief spin-ups along the squall line. Wind shear will be there for the strong winds/tornadoes, provided by a trough coming in. CAPE will high enough for tornadoes, wind, and hail. Storms will be/are firing on and ahead of the surface cold front. At first storms will be mostly isolated to scattered thunderstorms but as the day/storms progress they will form into a destructive squall line. Winds will be possibly up to hurricane force and brief tornadoes from the squall line are possible as well. Today may not be a high risk day but a big threat remains and everyone in the NE needs to take this severe weather outbreak today seriously. Stay safe everyone and I will have a tropical update/graphical forecast later today.