Severe weather outbreak - June 12-13 - Midwest, Mid-Atlantic

[Infdidoll]

We're in our basement on Rt. 17 near Fredericksburg, VA...Tornado warning...any info on where this tornado is and if there IS one on the ground? I know, I know...I come from typhoons in Okinawa to tornadoes here!

[brunota2003]

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* TORNADO WARNING FOR...
KING GEORGE COUNTY IN NORTHERN VIRGINIA...

* UNTIL 330 PM EDT

* AT 258 PM EDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS OVER NORTHERN CAROLINE COUNTY...OR 9 MILES SOUTH OF
POTOMAC CREEK...AND WAS MOVING NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
NINDE...

[brunota2003]

I see a couple spotter reports of a roped funnel about 1/2 to 3/4 down to the ground, but that was from a while ago...around 2:35 pm (same storm)

[Infdidoll]

I think we're in the clear...Looks like the storm has veered to the East of us. Now it's heading up towards where my husband works, though.

[WeatherGuesser]

Personally, I don't see anything near Fredricksburg. What I see is over near Colonial Beach.

[brunota2003]

That's the same cell. It moved just south of Fredericksburg. There was a funnel cloud about 3 or 4 miles WSW of the city earlier, it has since moved off to the east.

[Infdidoll]

I saw the clouds when I took the dog out for a walk. Looked like there was a lot of upper level shear, beginnings of overshooting top. Looked like a good cell. Now there are two areas of rotation in that same storm, further to the east. Missed where my husband works. Very fast-moving storm!

[brunota2003]

We had a line of severe thunderstorms roll through Central and Eastern KY this morning, around 11:30 am. Here is a short video I recorded (on my phone) as the storms were moving through. We had some small limbs down, and in town they had a tree come down. This line produced a lot of damage across the region, judging by the numerous LSRs that were issued.

https://www.facebook.com/photo.php?v=10201337078447849

[RL3AO]

Looking at the rate of wind reports, the high risk probably would have been more justified then yesterdays.

[Cyclenall]

Looking at the rate of wind reports, the high risk probably would have been more justified then yesterdays.

You wouldn't think it considering the very low amount of activity in here during the last several hours. That line that is occurring near the SE US, is that somehow part of that Derecho that moved through east OH valley last night into today? I know the north part has long moved off into the Atlantic ocean.

[tolakram]

I think we need to be more careful throwing around the derecho term. As far as I can tell no derecho ever developed, and the latest article I can find with a source at the SPC seems to confirm this.

http://www.cbsnews.com/8301-201_162-575 ... -atlantic/

The weather service said intense winds estimated to have reached 70-80 mph in some areas snapped large trees at their trunks or uprooted them entirely.

By early Thursday, though, the derecho that had been forecast hadn't developed.

"With each hour that goes by, it's less likely," said Greg Carbin of the storm prediction center.

A derecho is a storm of strong straight-line winds spanning at least 240 miles.

[brunota2003]

The SPC posted a graphic on Facebook labeling it as a "low-end derecho"

[tolakram]

:uarrow: The SPC posted a graphic on Facebook labeling it as a "low-end derecho"

I wonder what qualifications they use for that? Ah well, good to know, thanks for the update.

[brunota2003]

:uarrow: The SPC posted a graphic on Facebook labeling it as a "low-end derecho"

I wonder what qualifications they use for that? Ah well, good to know, thanks for the update.

Don't know, but they said it went over 600 miles and produced damaging winds pretty much along the entire path. I think they said yesterday's MCS was a low-end derecho as well.

[Ntxw]

I would definitely call that squall line a Derecho. To me it is a Derecho if they survive past heating of the day, it's usually a self sustaining bow echo and will do damage in a large region even at night when most storms wane. Derechos occur all the time in the plains but often get ignored cause it's over open land, we had several going simultaneously last month and this one looked just as good as those. In the east density and foliage magnifies their effects and the worst of it I think went towards the SE and southern Mid Atlantic, avoiding the closely watched mega regions of the northeast.