Posted: 5:55 am Tuesday, September 12th, 2017
By Kirk Mellish
Damage, deaths, and flooding in Georgia including in Metro Atlanta. Hundreds and hundreds of trees down and power outages scattered all around the city and Suburbs.
ALL WATCHES WARNINGS AND ADVISORIES have been canceled. Wind gusts this down to 18 mph or less this afternoon with scattered light showers in the region. A peak of sun possible in spots.
The weather will gradually get back to normal over the next 5 days.
SURFACE WIND [knots] AND PRESSURE:
The rain that fell, 2 to 5 inches in the Metro:
Irma could have been MUCH WORSE for Atlanta. Once again we have our old friend and nemesis “the wedge” or cold air damming (CAD) to mitigate severe weather in Atlanta. I’ve blogged about the wedge many times before as it is a major unique player in Georgia’s weather in many seasons, and can help or hurt us.
This time the unseasonably cool air in place prior to the arrival of IRMA kept the warm moist tropical air at bay, holding it closer to the Georgia coast. Had that not been in place, more of the strong winds aloft would have mixed down to the surface giving us stronger and more widespread winds and more damage more like Opal. And the tornado threat would have been much higher as well without the stabilizing influence of the cool air. It also helped limit total rainfall from being higher.
In 30 years of forecasting here I have experienced the impacts of many tropical storms and hurricanes or their side effects here in Atlanta, but never with such cool temperatures. Normally its warm and muggy.
RECORD low HIGH TEMPERATURES MONDAY:
(Discloser note: I’ve not verified this video is from GA or this storm, but do trust the source) The point is valid either way! >Tree falls right in front of moving car.
Peak winds in Atlanta at least at official reporting stations 50-64 mph around and after 3pm yesterday.
THE WIND IN GEORGIA:
FOLLOW ME on Twitter @MellishMeterWSB