Burst of Wind & Rain
Posted by Chris Lambert
Tough day watching the severe weather unfold in the Midwest as tornadoes devastated some towns. As of 6:00PM, there have been at least 65 reports of tornadoes, most in Indiana and Illinois. The National Weather Service will survey the damage in the coming days, but from what it appears, some of these were at least EF3 or EF4 tornadoes. To get damage to the extent that we're seeing in pictures and video, winds need to be at least somewhere in the 150-175mph range.
For us, this same system/cold front moves in tomorrow morning. It'll be in a weaker state, but still capable of producing strong wind gusts and bursts of heavy rain. The timing of the worst for us is in the 4:00-9:00AM period as downpours, gusty winds and thunder roll in. Outside 495, it tends to be in the 4:00-6:00AM timeframe, and in 6:00-8:00AM timeframe closer to Boston and up to 9:00AM over the Cape. The Storm Prediction Center out of Oklahoma does have us in a slight risk for severe weather in regards to damaging wind gusts (58mph+) for tomorrow morning thanks to very strong winds just above the surface. The strongest storms do have a chance to mix down those higher winds to produce that 58+mph gust, but it's more the exception than the rule . Most towns see wind gusts in the 35-45mph and a quick 0.25-0.50" of rain. We'll still guard against that potential higher gust, and certainly pass along any warnings that come out.
Overall, it's a quick hitting system, but does time out to snarl up the Monday morning commute.
Temps are warm tomorrow morning, mid 60s, before falling into the mid 50s in the afternoon. Colder air builds in at night and sticks with us for a few days.