weatherextreme Posted May 1, 2017 Author Share Posted May 1, 2017 Per request with this being the same system "In my opinion, lets just keep this forum for the entire event because there is NO ONE discussing it in the SE forum" ------------------------------------------------------------------------------------------------------------------------------------------------- Large enhanced area and 5% Tornado for Monday Strong Tornadoes mentioned in the outlook Beneath increasingly difluent flow aloft, frontal and orographic forcing for ascent are expected to aid initiation of thunderstorms near/east of Lake Erie, southward along the western slopes of central into southern Appalachians by 18-21Z. This activity seems likely to eventually consolidate and grow upscale into an organizing squall line as it crosses the Allegheny mountains and plateau, and to the lee of the Blue Ridge, by early evening. As it does, it probably will be accompanied by increasing potential for damaging surface gusts, given the strength of the ambient wind fields, with damaging straight line winds becoming the predominant severe threat. However, supercell structures, within and perhaps ahead of the line as it evolves, may be accompanied by a risk for tornadoes, one or two of which could be strong. Link to comment Share on other sites More sharing options...
weatherextreme Posted May 1, 2017 Author Share Posted May 1, 2017 Posted by Reed Timmer Drone View Link to comment Share on other sites More sharing options...
JasonOH Posted May 1, 2017 Share Posted May 1, 2017 Looks like there's some ground scouring in the drone video. Sure brings a different perspective to the damage that occurred. Link to comment Share on other sites More sharing options...
aggiegeog Posted May 1, 2017 Share Posted May 1, 2017 Northern Smith Co damage from when it started to line out and die. Looks like it put on one last burst. Link to comment Share on other sites More sharing options...
Drz1111 Posted May 1, 2017 Share Posted May 1, 2017 The spinup on the line moving toward Pymatuning reservoir should be warned. Smaller spin-ups than that have been putting down tornados with this system. Link to comment Share on other sites More sharing options...
aggiegeog Posted May 1, 2017 Share Posted May 1, 2017 Looks like they will go with an EF-1 on the Lindale one. That makes three years in a row with tornado damage in the immediate Lindale area. Update: A possible separate EF-0 near Mineola. NWS survey ongoing. Link to comment Share on other sites More sharing options...
Calderon Posted May 1, 2017 Share Posted May 1, 2017 Eustace tornado upgraded to EF4. Canton tornado that hit the car dealership is still under review. This marks the strongest tornado in NWS FWD's area since the Garland/Rowlett EF4 on 12/26/2015. Link to comment Share on other sites More sharing options...
pbrussell Posted May 2, 2017 Share Posted May 2, 2017 18 hours ago, Calderon said: Eustace tornado upgraded to EF4. Canton tornado that hit the car dealership is still under review. This marks the strongest tornado in NWS FWD's area since the Garland/Rowlett EF4 on 12/26/2015. So, I wasn't tracking this storm on radar when it was producing. Judging from the damage paths and time signatures, was this a double/simultaneous tornado event? If anyone has screen captures of this storm on radar (velocity, reflectivity - whatever you got), I would greatly appreciate seeing them if you don't mind sharing them. Link to comment Share on other sites More sharing options...
1900hurricane Posted May 2, 2017 Share Posted May 2, 2017 The EF-4 did exist simultaneously with an EF-2 between Eustace and Canton, although they were from two different cells in close proximity. The EF-4 was dropped by the northern cell and pretty much completely rain-wrapped, largely due to the proximity to the southern cell. The southern cell cycled very quickly and ended up dropping the EF-3 wedge that past on the east side of Canton. Link to comment Share on other sites More sharing options...
1900hurricane Posted May 2, 2017 Share Posted May 2, 2017 707 NOUS44 KFWD 021651 CCA PNSFWD TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-022045- Public Information Statement National Weather Service Fort Worth TX 1135 AM CDT Tue May 2 2017 ...Public Information Statement... ...NWS DAMAGE SURVEY FOR 04/29/17 TORNADOES... .Corrected to add summary on the second Eastern Canton Tornado. .Update...Adding final information to the existing 6 known tornadoes and adding one additional tornado. .Overview... National Weather Service damage survey teams continued to survey the damage across Henderson, Van Zandt, Rains and Hopkins Counties. Multiple teams were deployed Sunday and Monday to piece together the events that unfolded on April 29th, 2017. A total of 7 tornadoes occurred between 4:15 pm and 7:13 pm over the four counties. Synoptically, a deep low pressure system near the Four corners continued to move east, causing early morning thunderstorms to develop along the Texas Panhandle and into Oklahoma. A cold front was moving southeast across the state and entered our northwestern counties around sunrise. The strength of the cap was sufficient to hamper any development until mid afternoon. Deep forcing for ascent approached from from the west while remnant boundaries associated with convection over far East Texas and West Louisiana moved in from the east. By 3:30 PM, several parameters came together for the rapid development of severe storms east of Interstate 35/35E. Pre-frontal convection led to the development of supercells, producing numerous tornadoes over a relatively small area. Additional storm development quickly developed along the cold front with several reports of large hail, and eventually producing a brief EF-0 Quasi-Linear Convective System (QLCS) tornado (Tornado #7). The survey crew teams determined yesterday that there was indeed a nearly 55 mile damage swath, yet found evidence that there were two tornadoes which caused the damage. One tornado began in western Henderson County and moved into central Van Zandt County. This tornado occluded and dissipated, and a second, long track tornado began nearby. This second tornado was the EF-3 which produced damage on the east side of Canton, Fruitvale, Emory, and finally dissipating near Lake Fork. The first tornado had a track of approximately 12 miles, while the other had a track of nearly 42 miles. The tornadoes are listed below in chronological order and may not match the same order as previous public information statements. The tornado fatalities are listed below, yet more investigation is needed to determine the number of injuries by each tornado. It is known that at least 49 people were transported to area hospitals because of Saturday`s tornadoes. These tornado numbers should match the tornado numbering system on graphics on the main NWS Fort Worth website. .Tornado #1 Grand Saline Area... Rating: EF0 Estimated Peak Wind: 80 mph Path Length /statute/: 1.54 miles Path Width /maximum/: 100 yards Fatalities: 0 Injuries: 0 Start Date: 04/29/2017 Start Time: 04:15 PM CDT Start Location: 5 SSW Grand Saline / Van Zandt County / TX Start Lat/Lon: 32.6056 / -95.7526 End Date: 04/29/2017 End Time: 04:18 PM CDT End Location: 4 SSW Grand Saline / Van Zandt County / TX End Lat/Lon: 32.6272 / -95.7457 Summary: This tornado was observed by storm spotters and storm chasers. This was fairly brief tornado, with damage noted only to trees. .Tornado #2 East Canton... Rating: EF0 Estimated Peak Wind: 75 mph Path Length /statute/: 1.81 miles Path Width /maximum/: 75 yards Fatalities: 0 Injuries: 0 Start Date: 04/29/2017 Start Time: 05:10 PM CDT Start Location: 1 ESE Canton / Van Zandt County / TX Start Lat/Lon: 32.5405 / -95.8429 End Date: 04/29/2017 End Time: 05:14 PM CDT End Location: 2 ENE Canton / Van Zandt County / TX End Lat/Lon: 32.5642 / -95.8299 Summary: This brief tornado occurred in nearly the same area of the larger tornado which came through about an hour later. This tornado caused damage to trees and a few barns, just southeast of the city center of Canton. .Tornado #3 Eustace to West Canton... Rating: EF4 Estimated Peak Wind: 180 mph Path Length /statute/: 21.94 miles Path Width /maximum/: 1760 yards Fatalities: 2 Injuries: Unknown Start Date: 04/29/2017 Start Time: 05:29 PM CDT Start Location: 2 N Log Cabin / Henderson County / TX Start Lat/Lon: 32.2572 / -96.018 End Date: 04/29/2017 End Time: 06:09 PM CDT End Location: 4 W Canton / Van Zandt County / TX End Lat/Lon: 32.5528 / -95.9306 Summary: This was the strongest tornado to occur during this event, with damage consistent with an EF4 winds was surveyed in the community of Old Bethel in Van Zandt County. A survey team found that this tornado began near the intersection of FM 2813 and 2329, or about two miles north of the town of Log Cabin in northwestern Henderson County. The tornado then tracked northeast and crossed US-175 2 miles southeast of Eustace, before moving towards the north after crossing FM 2709. Mainly tree damage was observed from this location to the Van Zandt/Henderson County border. More substantial damage to several residences then occurred as this tornado crossed into southern Van Zandt County, consistent with winds around 100 to 120 mph. Complete destruction to a mobile home was observed here. The tornado continued northward, and produced the most substantial damage in a narrow corridor near the intersection of FM 2301 and 2313. All walls of a well constructed two story brick house collapsed, with additional severe debarking of numerous trees occurring on the property. This damage is consistent with wind speeds around 175 to 185 mph. The tornado reached its greatest width, roughly 1 mile, as it crossed SH- 198 where numerous high tension towers were demolished. The tornado then gradually weakened as it curled towards the northwest, before finally dissipating near SH-243, 2 miles outside of Canton. .Tornado #4 Henderson County to South Van Zandt County... Rating: EF2 Estimated Peak Wind: 125 mph Path Length /statute/: 11.82 miles Path Width /maximum/: 100 yards Fatalities: 0 Injuries: Unknown Start Date: 04/29/2017 Start Time: 05:41 PM CDT Start Location: 3 NE Log Cabin / Henderson County / TX Start Lat/Lon: 32.251 / -95.9803 End Date: 04/29/2017 End Time: 06:04 PM CDT End Location: 9 NE Eustace / Van Zandt County / TX End Lat/Lon: 32.4061 / -95.9025 Summary: This tornado developed northeast of Log Cabin with the first visible damage associated to snapped trees. As the tornado moved north/northeast, a tall communications tower was snapped in half. Eventually, the tornado crossed paths with several homes which led to complete destruction and many debarked trees. The damage path continued to the northeast, eventually stopping near the intersection of Van Zandt County Road 2903 and FM 1256. As this tornado occluded and dissipated, the next tornado began in the next few minutes. .Tornado #5 Eastern Canton Tornado... Rating: EF3 Estimated Peak Wind: 145 mph Path Length /statute/: 40.05 miles Path Width /maximum/: 1760 yards Fatalities: 2 Injuries: Unknown Start Date: 04/29/2017 Start Time: 06:08 PM CDT Start Location: 10 S Canton / Van Zandt County / TX Start Lat/Lon: 32.3991 / -95.8756 End Date: 04/29/2017 End Time: 07:28 PM CDT End Location: 6 NE Emory / Rains County / TX End Lat/Lon: 32.954 / -95.6987 Summary: This tornado began as tornado #4 dissipated and the supercell cycled another tornado about a mile to the east and northeast. This tornado quickly grew to a large tornado, becoming slightly less than one mile wide at its widest point. The tornado was at the strongest near Interstate 20 and FM 17 just north of Canton. The survey crews found continuous damage between Canton and Fruitvale, and then additional damage as far north as Emory, and Lake Fork. Several homes, businesses, and farm buildings were damaged or destroyed in the 40 mile continuous damage path. This tornado occurred for over an hour, and spanned most of Van Zandt, and nearly all of Rains Counties during the 80 minute track. .Tornado #6 Miller Grove to Cumby Area... Rating: EF0 Estimated Peak Wind: 85 mph Path Length /statute/: 8.93 miles Path Width /maximum/: 100 yards Fatalities: 0 Injuries: Unknown Start Date: 04/29/2017 Start Time: 06:32 PM CDT Start Location: 4 NNE Point / Hopkins County / TX Start Lat/Lon: 32.9906 / -95.836 End Date: 04/29/2017 End Time: 06:50 PM CDT End Location: 1 SSE Cumby / Hopkins County / TX End Lat/Lon: 33.1146 / -95.8302 Summary: Residents recorded video of a tornado near FM 1567 and County Road 1137 shortly after 530 PM. Tornado briefly had multiple vortices but generally maintained a width of around 100 yards. The tornado traveled north along County Road 1131 with mainly tree damage observed. A metal barn was destroyed near CR 1131 and CR 1120. A home was damaged along FM 275 south of I-30 near the end of the track. The home burned after a large tree limb fell on the main powerline into the home. .Tornado # 7 Southwest Van Zandt County... Rating: EF0 Estimated Peak Wind: 80 mph Path Length /statute/: 0.88 miles Path Width /maximum/: 80 yards Fatalities: 0 Injuries: 0 Start Date: 04/29/2017 Start Time: 07:13 PM CDT Start Location: 3 ENE Mabank / Van Zandt County / TX Start Lat/Lon: 32.3859 / -96.0528 End Date: 04/29/2017 End Time: 07:15 PM CDT End Location: 4 ENE Mabank / Van Zandt County / TX End Lat/Lon: 32.3822 / -96.0384 Summary: This tornado was observed by residents of southwest Van Zandt County, south of Van Zandt County road 2308. This tornado occurred over open fields. EF Scale: The Enhanced Fujita Scale classifies tornadoes into the following categories. EF0...Weak......65 TO 85 mph EF1...Weak......86 TO 110 mph EF2...Strong....111 TO 135 mph EF3...Strong....136 TO165 mph EF4...Violent...166 TO 200mph EF5...Violent...>200mph NOTE: The information in this statement is preliminary and subject to change pending final review of the events and publication in NWS Storm Data. $$ Bain/Carlaw/Dunn/Fox/Godwin/Hernandez/McNatt/Ryan Link to comment Share on other sites More sharing options...
pbrussell Posted May 2, 2017 Share Posted May 2, 2017 39 minutes ago, 1900hurricane said: The EF-4 did exist simultaneously with an EF-2 between Eustace and Canton, although they were from two different cells in close proximity. The EF-4 was dropped by the northern cell and pretty much completely rain-wrapped, largely due to the proximity to the southern cell. The southern cell cycled very quickly and ended up dropping the EF-3 wedge that past on the east side of Canton. Thank you for this. Wasn't sure if this storm was some pilger type freak or what. Link to comment Share on other sites More sharing options...
Jim Martin Posted May 2, 2017 Share Posted May 2, 2017 Hate to be the bearer of bad news, but another enhanced risk for severe thunderstorms tomorrow in eastern Texas & western Louisiana. SPC has mentioned the risk for discrete supercell thunderstorms with attendant large hail/tornado risk. Link to comment Share on other sites More sharing options...
Santa Clause Posted May 2, 2017 Share Posted May 2, 2017 Yea, I was checking some model runs out, definitely a potential for some high end severe, even if it's limited. Link to comment Share on other sites More sharing options...
Jim Martin Posted May 2, 2017 Share Posted May 2, 2017 12z 3km NAM Sounding northeast of Houston, Texas for tomorrow. Looking like storm motion will be south and east. Link to comment Share on other sites More sharing options...
Hoosier Posted May 3, 2017 Share Posted May 3, 2017 Jackson, MS NWS has confirmed at least 23 tornadoes from April 30. I think they were all or mostly spawned out of that QLCS. Link to comment Share on other sites More sharing options...
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