on_wx Posted July 27, 2011 Share Posted July 27, 2011 F2 tornado confirmed in Lambton County ON from Friday WEATHER SUMMARY FOR ALL OF SOUTHERN ONTARIO AND THE NATIONAL CAPITAL REGION ISSUED BY ENVIRONMENT CANADA AT 11:26 AM EDT TUESDAY 26 JULY 2011. ------------------------------------------------------------- ENVIRONMENT CANADA HAS CONFIRMED AN F2 TORNADO TOUCHED DOWN IN LAMBTON COUNTY OF SOUTHWESTERN ONTARIO SATURDAY EVENING JULY 23RD 2011. THE DAMAGE TRACK IS ONE HALF KM WIDE AND 11 KM LONG EXTENDING FROM 7 TO 8 KM SOUTHEAST OF WYOMING ONTARIO TO 10 TO 12 KM SOUTH OF WATFORD ONTARIO. THE DAMAGE OBSERVED ALONG THIS PATH INCLUDED A BARN DESTROYED AND SEVERAL STEEL HYDRO TOWERS DOWN. THIS IS CONSISTENT WITH THE STRENGTH OF AN F2 TORNADO WITH WIND SPEEDS IN THE 180 TO 230 KM/H RANGE. NO DEATH OR INJURIES WERE REPORTED IN ASSOCIATION WITH THIS TORNADO. END/OSPC Link to comment Share on other sites More sharing options...
Thundersnow12 Posted July 27, 2011 Share Posted July 27, 2011 friend of mine, Brandon Sullivan just reported a brief elephant trunk tornado. Link to comment Share on other sites More sharing options...
andyhb Posted July 27, 2011 Share Posted July 27, 2011 These storms look to intensify as they move ENE. Link to comment Share on other sites More sharing options...
David Reimer Posted July 27, 2011 Share Posted July 27, 2011 Brandon Sullivan reported an elephant trunk tornado at 7:07 PM with the South Dakota storm. Link to comment Share on other sites More sharing options...
L.B. LaForce Posted July 27, 2011 Share Posted July 27, 2011 Elephant Trunk Tornado...on the ground a few minutes! score! Link to comment Share on other sites More sharing options...
andyhb Posted July 27, 2011 Share Posted July 27, 2011 Excellent work. That storm's current path puts it on a beeline for ABR. Also, strong rotation on the cell in SE ND. Link to comment Share on other sites More sharing options...
Jim Martin Posted July 27, 2011 Share Posted July 27, 2011 Tornado warning for Edmunds and Walworth County in South Dakota until 8pm cdt. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted July 27, 2011 Share Posted July 27, 2011 gust front really surging out ahead of it now Link to comment Share on other sites More sharing options...
Jim Martin Posted July 27, 2011 Share Posted July 27, 2011 Is that a sign of a weakening trend with this particular supercell? Link to comment Share on other sites More sharing options...
andyhb Posted July 27, 2011 Share Posted July 27, 2011 New tor watch issued to the east of the current one. Link to comment Share on other sites More sharing options...
Chicago Storm Posted July 27, 2011 Share Posted July 27, 2011 Nice HP cell along the ND/SD border, near Hecla. Link to comment Share on other sites More sharing options...
andyhb Posted July 27, 2011 Share Posted July 27, 2011 Looking like the tornado possibility has diminished substantially. Link to comment Share on other sites More sharing options...
Jim Martin Posted July 27, 2011 Share Posted July 27, 2011 Circulation increasing near Kidder, South Dakota on KABR. Link to comment Share on other sites More sharing options...
Jim Martin Posted July 27, 2011 Share Posted July 27, 2011 Tornado warning Marshall and Roberts County in South Dakota until 9pm cdt. Link to comment Share on other sites More sharing options...
andyhb Posted July 27, 2011 Share Posted July 27, 2011 Perhaps I spoke too soon. Substantial couplet west of Sisseton. Link to comment Share on other sites More sharing options...
Chicago Storm Posted July 27, 2011 Share Posted July 27, 2011 Link to comment Share on other sites More sharing options...
Stebo Posted July 27, 2011 Share Posted July 27, 2011 Maybe the start of a derecho? Link to comment Share on other sites More sharing options...
k*** Posted July 27, 2011 Share Posted July 27, 2011 Landcane Link to comment Share on other sites More sharing options...
Stebo Posted July 27, 2011 Share Posted July 27, 2011 A little old but BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ABERDEEN SD 956 PM CDT TUE JUL 26 2011 THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BIG STONE COUNTY IN WEST CENTRAL MINNESOTA... TRAVERSE COUNTY IN WEST CENTRAL MINNESOTA... EAST CENTRAL DAY COUNTY IN NORTHEAST SOUTH DAKOTA... GRANT COUNTY IN NORTHEAST SOUTH DAKOTA... ROBERTS COUNTY IN NORTHEAST SOUTH DAKOTA... * UNTIL 1100 PM CDT * AT 955 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 80 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM COLLIS TO 7 MILES EAST OF CORONA TO 6 MILES SOUTH OF SUMMIT...MOVING SOUTHEAST AT 40 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... LAGOONA BEACH AND CLINTON AROUND 1005 PM CDT... TWIN BROOKS AROUND 1010 PM CDT... ORTONVILLE...MILBANK AND BIG STONE CITY AROUND 1015 PM CDT... STOCKHOLM AROUND 1025 PM CDT... ARTICHOKE AROUND 1035 PM CDT... LA BOLT AROUND 1040 PM CDT... REVILLO AND ALBEE AROUND 1045 PM CDT... Link to comment Share on other sites More sharing options...
Siberian Express Posted July 27, 2011 Share Posted July 27, 2011 "A CYCLONIC GYRE".......per WW #693. First time I remember seeing that term. Link to comment Share on other sites More sharing options...
wisconsinwx Posted July 27, 2011 Share Posted July 27, 2011 Not likely to mean much given potential crapvection during the day, but SREF SigTor probabilities have parts of S Wisconsin/NE Iowa in 10 percent probs tomorrow evening around 0z. Link to comment Share on other sites More sharing options...
andyhb Posted July 27, 2011 Share Posted July 27, 2011 Does anyone have any further info on next week's potential threat? Imy mentioned a potentially significant trough ejecting eastward on Monday and Tuesday, along with a possibly well organized frontal system (He said perhaps the most developed in the last month) in the 4-8 day outlook. Link to comment Share on other sites More sharing options...
L.B. LaForce Posted July 27, 2011 Share Posted July 27, 2011 Dis guy? Link to comment Share on other sites More sharing options...
tornadotony Posted July 27, 2011 Share Posted July 27, 2011 SPC WRF did well today... Hope it's going to fail tomorrow...I can't imagine this being pretty... That's just a quick sample of the goodies it has... Link to comment Share on other sites More sharing options...
andyhb Posted July 27, 2011 Share Posted July 27, 2011 From the new 4-8 day: ...MON THROUGH WED... MEDIUM RANGE MODELS ARE IN GOOD AGREEMENT OF THE SRN PORTION OF A STRONG CANADIAN TROUGH AMPLIFYING INTO THE UPPER MS VALLEY ON MONDAY...AND THEN SHIFTING EWD INTO THE NERN STATES BY WED. A WELL DEFINED COLD FRONT WILL ACCOMPANY THE UPPER TROUGH THROUGH THE NRN STATES. THE FRONT IS LIKELY TO DROP AS FAR SWD AS THE CENTRAL PLAINS/MID MS VALLEY REGION TUESDAY AND OHIO VALLEY/MID ATLANTIC REGION WED. THERE SHOULD BE SUFFICIENT SHEAR...INSTABILITY AND STRONG HEATING AHEAD OF THE FRONT FOR ISOLATED SEVERE STORMS. HOWEVER...IT IS STILL TOO EARLY TO IDENTIFY IF AND WHERE THE SEVERE WEATHER THREAT WILL BE AOA 30 PERCENT. Link to comment Share on other sites More sharing options...
London snowsquall Posted July 27, 2011 Share Posted July 27, 2011 If those are like high-tension power transmission towers, that's typically considered EF3 damage. It was an F2 tornado that knocked down the hyrdo towers and took out my lights last Saturday night in SW Ontario. Good call by Tony. AWCN11 CWTO 270335Weather summary for all of Southern Ontario and theNational Capital Region issued by Environment CanadaAt 11:35 PM EDT Tuesday 26 July 2011.-------------------------------------------------------------Environment Canada has confirmed an f2 tornado touched down in Lambton County of Southwestern Ontario Saturday evening July 23rd 2011. The damage track is one half km wide and 11 km long extending from 7 to 8 km southeast of Wyoming Ontario to 10 to 12 km south of Watford Ontario. The damage observed along this path included a barn destroyed and several steel hydro towers down. This is consistent with the strength of an f2 tornado with wind speeds in the 180 to230 km/h range.No death or injuries were reported in association with this tornado.END/OSPC Link to comment Share on other sites More sharing options...
A-L-E-K Posted July 27, 2011 Share Posted July 27, 2011 SPC WRF did well today... Hope it's going to fail tomorrow...I can't imagine this being pretty... That's just a quick sample of the goodies it has... Whoa, new day 1 brings the risk back south into Chicagoland. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted July 27, 2011 Share Posted July 27, 2011 If the 0z 4km WRF verifies its not going to be good at all...I saved several images from that run. Link to comment Share on other sites More sharing options...
tornadotony Posted July 27, 2011 Share Posted July 27, 2011 If the 0z 4km WRF verifies its not going to be good at all...I saved several images from that run. One thing that's scary is that the RUC keeps sfc winds backed to the S within about one county of the LM shore...not only does that increase sfc convergence along that zone but it also shoots heilicity and EHI through the roof. Link to comment Share on other sites More sharing options...
Thundersnow12 Posted July 27, 2011 Share Posted July 27, 2011 One thing that's scary is that the RUC keeps sfc winds backed to the S within about one county of the LM shore...not only does that increase sfc convergence along that zone but it also shoots heilicity and EHI through the roof. with 0-1km SRH near 250 m2/s2 in extreme northeast IL at this time. Link to comment Share on other sites More sharing options...
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