Ed Lizard Posted November 17, 2010 Share Posted November 17, 2010 http://www.baltimore...0,7131967.story Link to comment Share on other sites More sharing options...
Dino Posted November 17, 2010 Share Posted November 17, 2010 I just heard about this. They have been under a gale warning, but that only covers 50+mph. They supposedly recorded over 80+mph winds. Maybe an F0 or F1 Tornado, but I think the extent of the damage is due to the ground being so wet before the onset of the strong winds, not necessarily a tornado. Link to comment Share on other sites More sharing options...
Ellinwood Posted November 17, 2010 Share Posted November 17, 2010 Given the SRM velocity with the line of storms, I'd go with a micro-burst or straight-line winds. The line didn't look terribly impressive on radar, so a tornado isn't the first thing to come to mind. It would be nice to get an aerial view! We've been discussing this on the 40S forums as well, and what I stated above seems to be the consensus. Link to comment Share on other sites More sharing options...
wxmeddler Posted November 17, 2010 Share Posted November 17, 2010 There is whole roofs ripped off town houses. click to image 16 http://www.wbaltv.co...631/detail.html Link to comment Share on other sites More sharing options...
Ed Lizard Posted November 17, 2010 Author Share Posted November 17, 2010 Given the SRM velocity with the line of storms, I'd go with a micro-burst or straight-line winds. The line didn't look terribly impressive on radar, so a tornado isn't the first thing to come to mind. It would be nice to get an aerial view! We've been discussing this on the 40S forums as well, and what I stated above seems to be the consensus. Thanks. Link to comment Share on other sites More sharing options...
Ellinwood Posted November 17, 2010 Share Posted November 17, 2010 There is whole roofs ripped off town houses. click to image 16 http://www.wbaltv.co...631/detail.html Thanks for the link! Based on the limited evidence in those images, I would have to say it's not a tornado. One image shows people on a roof with shingles torn off. Only one side of the roof shows damage, indicating that it either got fringed by a tornado or was subject to winds coming just from one side of the building. Another image shows debris on the ground near a building, but it is all just on one side of the building. A tornado would (usually) have debris strewn all over the place instead of just one side. Link to comment Share on other sites More sharing options...
Ellinwood Posted November 17, 2010 Share Posted November 17, 2010 Videos so far: http://www.wbaltv.co...434/detail.html Some aerial footage (scroll down for it), which supports straight-line winds. Link to comment Share on other sites More sharing options...
BethesdaWX Posted November 17, 2010 Share Posted November 17, 2010 Wow http://www.wbaltv.co...955/detail.html From what I saw here, it was an Insane straight-line wind event.......Then again........I don't live in Balti. Link to comment Share on other sites More sharing options...
wxmeddler Posted November 17, 2010 Share Posted November 17, 2010 Alright, I got the radar grabs! ( I love NCDC!) On the left is Base Velocity. On the Right is Storm Relative velocity. Link to comment Share on other sites More sharing options...
Ellinwood Posted November 17, 2010 Share Posted November 17, 2010 Alright, I got the radar grabs! ( I love NCDC!) On the left is Base Velocity. On the Right is Storm Relative velocity. Thanks for the radar grab! Looks like some broad rotation, but nothing tight that would indicate a tornado via Doppler. Would support a micro-burst, though. Link to comment Share on other sites More sharing options...
Master of Disaster Posted November 17, 2010 Share Posted November 17, 2010 Thanks for the radar grab! Looks like some broad rotation, but nothing tight that would indicate a tornado via Doppler. Would support a micro-burst, though. Wouldnt a microburst show up in velocity as broad rotation anyway considering it hits the ground and fans out? Winds would be going towards and away from the radar no? Link to comment Share on other sites More sharing options...
Ellinwood Posted November 17, 2010 Share Posted November 17, 2010 Wouldnt a microburst show up in velocity as broad rotation anyway considering it hits the ground and fans out? Winds would be going towards and away from the radar no? The scan itself is looking into the cloud, which does not usually represent exactly what's happening below the cloud base. The velocity scan simply shows that there is some rotation within the cell itself. If we had a velocity scan below the cloud during a microburst, then your assumption would be correct. Link to comment Share on other sites More sharing options...
Avdave Posted November 17, 2010 Share Posted November 17, 2010 The title should be changed. It wasnt at BWI in was in the Northeast section of Baltimore Link to comment Share on other sites More sharing options...
wxmeddler Posted November 18, 2010 Share Posted November 18, 2010 Just as a note... the radar beam at that distance is at 4,570 ft. asl... So nowhere close to representing whats going on on the ground.. In the mean time.. PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 551 PM EST WED NOV 17 2010 ...BALTIMORE STORM DAMAGE REMAINS UNDER INVESTIGATION... THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS COMPLETED AN INITIAL GROUND DAMAGE SURVEY FROM MORGAN STATE UNIVERSITY TO CARNEY IN THE BALTIMORE AREA. THIS AREA SUSTAINED DAMAGE DURING THE EARLY MORNING HOURS OF WEDNESDAY NOVEMBER 17. THE NATIONAL WEATHER SERVICE IS AWAITING ADDITIONAL INFORMATION AND IS CONTINUING ITS INVESTIGATION OF THE STORM DAMAGE. A FINAL STORM SURVEY REPORT IS EXPECTED TO BE ISSUED ON THURSDAY. $$ Link to comment Share on other sites More sharing options...
ThePhotoGuy Posted November 19, 2010 Share Posted November 19, 2010 http://www.erh.noaa.gov/er/lwx/events/svrwx_20101117/pns.php Link to comment Share on other sites More sharing options...
Kmlwx Posted November 19, 2010 Share Posted November 19, 2010 http://www.erh.noaa....0101117/pns.php Pretty intense! Must have been scary for the folks in that. Link to comment Share on other sites More sharing options...
Ellinwood Posted November 19, 2010 Share Posted November 19, 2010 Macroburst AND an EF-1 tornado... that's interesting. Link to comment Share on other sites More sharing options...
Kmlwx Posted November 19, 2010 Share Posted November 19, 2010 Macroburst AND an EF-1 tornado... that's interesting. No kidding! Meteorological demolition derby? Link to comment Share on other sites More sharing options...
wxmeddler Posted November 19, 2010 Share Posted November 19, 2010 No kidding! Meteorological demolition derby? THE DAMAGE FROM THE EF-1 TORNADO WAS IN TWO SEPARATE AREAS A HALFMILE APART. THE FIRST AREA WAS ONE-TENTH OF A MILE LONG AND 175 YARDS WIDE THAT INCLUDED THE DUTCH VILLAGE APARTMENT COMPLEX. THREE OF THE UNITS HAD THEIR ROOFS BLOWN OFF. THE ROOFS WERE NOT CLIPPED TO THE STRUCTURES. THERE WAS EXTENSIVE TREE DAMAGE. SEVERAL CARS WERE SHIFTED BY THE FORCE OF THE WIND. THE TORNADO LIFTED BRIEFLY. THEN THE SECOND AREA... APPROXIMATELY A HALF MILE NORTH OF THE FIRST AREA...WAS ONE-THIRD OF A MILE LONG AND 250 YARDS WIDE...CENTERED ON THE PERRING PARKWAY SHOPPING CENTER IN PARKVILLE. EVIDENCE OF THE TORNADO INCLUDED RETAIL PROPERTY SURVEILLANCE CAMERAS WHICH SHOWED DEBRIS BLOWING IN DIFFERENT DIRECTIONS...TREES AND LIGHT POLES FALLING IN A CONVERGENT PATTERN...EYEWITNESS REPORTS...AND LEAF SPATTER ON ALL FOUR SIDES OF AUTOMOBILES AND STRUCTURES Nice.. I would love to see that footage. For a weekend project I am going to go over the BWI TDWR data (its a wayy lower scan) and see what it comes up with. Link to comment Share on other sites More sharing options...
billgwx Posted November 19, 2010 Share Posted November 19, 2010 PNSLWX certainly spells things out in great detail. Would be interesting to see low level data from the TBWI radar. Link to comment Share on other sites More sharing options...
Master of Disaster Posted November 19, 2010 Share Posted November 19, 2010 Anyone have a link to archived radar loop? Composite preferrably. Link to comment Share on other sites More sharing options...
Ellinwood Posted November 19, 2010 Share Posted November 19, 2010 Anyone have a link to archived radar loop? Composite preferrably. Why would you want a composite? Less detail! If it's a regional composite you're looking for, there's a nice one archived here: http://www.mmm.ucar.edu/imagearchive/ Just choose the date (11/16/10), choose 1 for Extra Days at the top, click on RadarComposites and select the Mid-Atlantic. The composite is about once an hour, but has a frame for about 6 minutes prior to the tornado (0624Z on the 17th). It's a good look at the system as a whole Link to comment Share on other sites More sharing options...
das Posted November 19, 2010 Share Posted November 19, 2010 Nice.. I would love to see that footage. For a weekend project I am going to go over the BWI TDWR data (its a wayy lower scan) and see what it comes up with. Here's the TDWR lowest layer scan and base velocity loops: Link to comment Share on other sites More sharing options...
Kmlwx Posted November 19, 2010 Share Posted November 19, 2010 Here's the TDWR lowest layer scan and base velocity loops: Thanks for the pics! Link to comment Share on other sites More sharing options...
northpittweather Posted November 21, 2010 Share Posted November 21, 2010 In the early evening hours near Pittsburgh a similar storm came through and produced a spin up, numerous trees were down and a barn roof was taken off from an iconic barn near by No NWS Survey team came out Link to comment Share on other sites More sharing options...
Kmlwx Posted November 21, 2010 Share Posted November 21, 2010 In the early evening hours near Pittsburgh a similar storm came through and produced a spin up, numerous trees were down and a barn roof was taken off from an iconic barn near by No NWS Survey team came out So they never confirmed it officially? Or they did but just didn't send a team? Link to comment Share on other sites More sharing options...
wxmeddler Posted November 21, 2010 Share Posted November 21, 2010 Here's the TDWR lowest layer scan and base velocity loops: Ahh I forgot you the Plymouth site did that. I was going to go through the NCDC HAS data order and the Data/Climate toolkit that they have. A lot more work than this. Thanks! Link to comment Share on other sites More sharing options...
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