Midwest storm may bring severe weather to DC
As mentioned in my earlier post, the powerhouse Midwest storm is generating a major severe thunderstorm and tornado outbreak in the Ohio and Tennessee Valley. Tornado watches extend from Michigan to Mississippi. But NOAA's Storm Prediction Center indicates the storm threat extends even east of there, with a slight risk of severe thunderstorms reaching all the way into the D.C. metro region by late tonight.
So how significant is the risk?
The cold front running out ahead of the storm, responsible for the current severe outbreak, rumbles into West Virginia this evening. It should be accompanied by a strong squall line at that time.
The squall line may start to break apart somewhat as it crosses the mountains, loses the energy supplied by daytime heating, and interacts with somewhat weaker atmospheric dynamics over our region. Nonetheless, a broken line of showers and thunderstorms is likely to move into western Virginia, western Maryland and the far western suburbs between about 9 p.m. and 2 a.m. This line of storms may produce strong, even damaging winds and heavy rain.
The line of showers and storms is most likely to impact the D.C. metro region - from west to eat - between about 2 and 7 a.m. Heavy rain and strong winds (gusts to 50 mph or so) are possible, particularly in the north and west suburbs.
As the front approaches and moves through the metro region, it's going to slow down, which may allow for a second round of showers and storms during Wednesday afternoon and evening - especially east of Washington. Some of these storms could also be strong, with a slight risk of damaging winds.
The bottom line is that the risk of severe weather is going to diminish as the front associated with this massive Midwest storm propagates eastward toward the mid-Atlantic, divorcing itself from its parent storm center - way back in central Ontario. Nonetheless, we should be aware of two windows for possibly active weather here: in the predawn hours Wednesday morning and late Wednesday afternoon.
Posted by: lmd217 | October 26, 2010 1:00 PM | Report abuse
Posted by: MKoehl | October 26, 2010 1:07 PM | Report abuse
Posted by: Jason-CapitalWeatherGang | October 26, 2010 1:12 PM | Report abuse
Posted by: MKoehl | October 26, 2010 1:31 PM | Report abuse
Posted by: MKoehl | October 26, 2010 1:32 PM | Report abuse
Posted by: HenryFPotter | October 26, 2010 1:39 PM | Report abuse
Posted by: tinkerbelle | October 26, 2010 1:52 PM | Report abuse
Posted by: DullesARC | October 26, 2010 2:07 PM | Report abuse
Posted by: VaTechBob | October 26, 2010 2:08 PM | Report abuse
Posted by: tinkerbelle | October 26, 2010 2:35 PM | Report abuse
Posted by: OfficePhone | October 26, 2010 3:39 PM | Report abuse
The comments to this entry are closed.