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June 10-14 Severe/Flooding Wx - Obs, Radar, Warnings, Dmg. rpts


wxmeddler

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I left Woodlawn at 4, got to Odenton at 4:45, which took me by the airport area.  By the time I got to I-195, the sun was coming out.  While I'm by no means spotter trained, I saw nothing of suspicion.

 

 

I'm certainly not an expert either, but I didn't see any rotation on level 2 radar data, and I was watching it pretty closely as I have family in Severn.

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Your backyard is beautiful. I am so jealous! I really need to leave crummy MoCo in favor of a place on the bay! Atleast until I relocate permently to a place in the coastal south.

 

Thank you! I am very lucky to live in a waterfront community that has many water accesses which is often hard to find around here.

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Since SPC doesn't post their criteria anywhere not sure what it is specifically but the event did not meet the initial Fujita definition of a derecho.  Regardless, it produced like 5 reports around here..

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I'm not sure it was that clear where the focus would be. The timing argued for south and east of DC for the most widespread. But if it was not for that initial shift from the morning system we probably would have had a more significant event.  Arguably, in retrospect, we should have maybe anticipated that cold pool to do what it did despite model simulations. 

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LOL just watched that video from 97.1. They thought that whole rain shaft was a large tornado. What would people from the Plains states think of that clip?

Probably thinking that it's someone who mistook a rain shaft with straight line winds for a tornado because they rarely see them and the media was hyping things up as the end of days. They would probably think that the people in the video are lucky to not know the difference between a rain shaft/straight line winds and a tornado because tornados destroy lives.

Even though it shouldn't is still amazes me how some of the general public is to stupid to realize the difference between straight line winds in a thunderstorm and an actual tornado.

It shouldn't surprise you. Why should the general public, most of whom will never experience a tornado in their lives, be able to tell the difference between them, especially on a day when there was all kinds of hyping up of tornado possibilities? Ads I wouldn't call the general public "stupid" because of that (though you can argue the general public is generally dumb). It's simply naïveté.

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Even when you've seen a tornado it can be tricky identifying all the features leading up etc. Think public 'wishing' for things seen to be a tornado is that tornadoes are sexier than regular winds. Plus the power of suggestion.. If you're under a warning and see low hanging clouds you probably run to thinking its a tornado.

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...TORNADO CONFIRMED IN MONTGOMERY COUNTY MARYLAND...

LOCATION...NORTH POTOMAC TO BURTONSVILLE IN MONTGOMERY COUNTY MARYLAND
DATE...JUNE 13 2013
ESTIMATED TIME...3:41 PM EDT TO 3:59 PM EDT
MAXIMUM EF-SCALE RATING...EF-0
ESTIMATED MAXIMUM WIND SPEED...75 MPH
MAXIMUM PATH WIDTH...150 YARDS
PATH LENGTH...17.3 MILES
BEGINNING LAT/LON...39.091N / 77.269W
ENDING LAT/LON...39.108N / 76.947W
* FATALITIES...0
* INJURIES...0

* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
CHANGE PENDING FINAL REVIEW OF THE EVENT(S) AND PUBLICATION IN
NWS STORM DATA.

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At it's closest approach that tornado was probably about 2.5-3 miles from me. It probably passed right near or directly on top of the school where my mom works!

 

 

 

...SUMMARY...

EYEWITNESS ACCOUNTS...RADAR IMAGERY...AND A GROUND SURVEY CONCLUDED
A LONG TRACK EF-0 TORNADO OCCURRED IN MONTGOMERY COUNTY MARYLAND
ON THE AFTERNOON OF JUNE 13TH 2013. PEAK WINDS WERE ESTIMATED AT
75 MPH. DAMAGE WAS ALMOST ENTIRELY FROM DOWNED TREES. IN THAT
REGARD NUMEROUS HOMES AND A FEW PARKED VEHICLES WERE DAMAGED BY
TREES FALLING ONTO THEM. NO INJURIES HAVE BEEN REPORTED.

FIRST CONSISTENT DAMAGE WAS NOTED NEAR THE INTERSECTION OF TURKEY FOOT ROAD
AND JONES LANE IN SOUTHWEST MONTGOMERY COUNTY NEAR NORTH POTOMAC
MARYLAND WHERE A FEW LARGE TREES WERE OVER THE ROAD. THE TORNADO
RACED EAST NEARLY 60 MPH TO THE NORTHERN SECTION OF ROCKVILLE
MARYLAND. AT LEAST 14 HOMES WERE SIGNIFICANTLY DAMAGED BY UPROOTED
TREES. AS IT CONTINUED EAST TO THE NORBECK AND ASPEN HILL
AREA 30 TREES WERE UPROOTED IN THE MANOR COUNTRY CLUB GOLF COURSE
AS WELL AS NUMEROUS HOMES DAMAGED IN THE SURROUNDING COMMUNITIES
FROM TREE DAMAGE. TREE DAMAGE WAS NOTED ALONG THE INTERCOUNTY
CONNECTOR ROUTE 200 AT THE LAYHILL ROAD EXIT. FINALLY A FEW TREES
WERE DOWNED IN SPENCERVILLE AND BURTONSVILLE.

BASED ON THE DAMAGE, THIS TORNADO IS RATED EF-0, WITH ESTIMATED
WIND SPEEDS OF 75 MPH. THE 17.3 MILE DAMAGE PATH LENGTH WAS COVERED
IN 18 MINUTES AND HAD CONSISTENT SMALL BRANCH DAMAGE WITH
OCCASSIONAL AREAS WITH SIGNIFICANT TREE DAMAGE.

ADDITIONALLY THERE WAS A PARALLEL 7 MILES PATH OF DAMAGE THROUGH SOUTH
ROCKVILLE AND GLENMONT MARYLAND WITH SIMILAR TREE DAMAGE. THIS
AREA WAS FOUND TO BE STRAIGHT LINE WINDS FROM THE OUTFLOW JUST
SOUTH OF THE TORNADO FROM THE PARENT SUPERCELL STORM.

THE NATIONAL WEATHER SERVICE WOULD LIKE TO EXTEND ITS THANKS TO MONTGOMERY
COUNTY FIRE WHO CONFIRMED THE TORNADO ON THE GROUND DURING THE STORM
AND MONTGOMERY COUNTY EMERGENCY MANAGEMENT WHO PROVIDED INVALUABLE
ASSISTANCE DURING THE GROUND SURVEY.

&&


$

CAS/KCS/HAS
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Question for DC proper folks: how often are multiple mature trees uprooted in the downtown (e.g. Dupont) area? Once a year? Twice a year?

Probably about 1-2 on avg. last yr it seemed like 5 tho I can't remember now.
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Gotta wonder if its really a continuous path.

To fill the gaps a little with personal accounts - 

My mom works at an elementary school in the part of the path between the ending lat/lon and the Layhill Road/ICC exit and there was sig damage in that neighborhood. So at least at that point it was still on the ground. 

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We got an EF-0. Why downplay it. It was a long track tornado in populated areas and it was a significant weather event. It is what most here seem to covet. Action. I read the much greater risk was supposed to be well south of here. 

 

Fox5 is reporting a 17.3 mile path for the MoCo storm.  

 

Sure it skipped or may not have even lasted a mile in total but in the end there is a general path of destruction. The ground was saturated but there were also plenty of trees topped. My lawn furniture had never traveled farther. 

 

Fox5 said it started in southern Darnestown hoped 270 rode the ICC through South Olney and lifted in Burtonsville. I would like to see it on a map. 

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EF0 with that long of a path isn't something that has been documented very often, and it's particularly surprising since that area isn't the middle of nowhere with few targets to hit. Using Severeplot, I only found a little over 120 F/EF0s with a path length of at least 17 miles since 1950 (out of like 56,000 tornadoes).

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EF0 with that long of a path isn't something that has been documented very often, and it's particularly surprising since that area isn't the middle of nowhere with few targets to hit. Using Severeplot, I only found a little over 120 F/EF0s with a path length of at least 17 miles since 1950 (out of like 56,000 tornadoes).

 

Interesting fact, thanks for posting that.   :)

 

One of the pics we took from the EOC wall of the traffic cameras on 355. Not sure if this is the tornado but it does match the location and time. 

 

post-892-0-75076300-1371301013_thumb.jpg

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I don't see one either.  Unless he's talking about the dark object coming out of the tree line just to the right of the road, but I believe that is the Washingtonian Tower.

 

Right near the center of the screen, it's less obvious now that I see it on a computer. It looked more convincing on my cell phone. Oh well.

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