Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >
Overview
An embedded shortwave within the upper flow sparked off scattered showers and thunderstorms across the Oklahoma and Texas Panhandles during the evening and overnight hours of June 20th, 2017. A supercell thunderstorm moving southward across Sherman County produced two microbursts as it neared the southern portion of the county. The first microburst produced damage consistent with 118 mph winds. Some of this damage was two walls knocked out of a well built warehouse, bent over radio tower, and a flipped horse trailer. The second microburst occurred approximately 4 miles south-southeast of the first. This one resulted in wind gusts of 85 mph. This microburst snapped 12 to 13 telephone poles along FM1573. As this supercell moved into northern Moore County it also produced nickel size hail.
Wind Damage Photos:
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| Storm Survey: Destroyed Warehouse at Spurlock Farms | Storm Survey: Flipped horse trailer at Spurlock Farms | Storm Survey: Damage telephone pole along FM1573 | Storm Survey: Bent radio tower at Spurlock Farms |
Radar:
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| Radar image of first microburst north of FM1573 | Radar image of second microburst south of FM1573 | Radar image as the supercell which caused the microburst moved over central Moore County |
Storm Reports:
PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE AMARILLO TX 1132 PM CDT THU JUN 22 2017 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0850 PM TSTM WND DMG 12 NE CACTUS 36.18N 101.89W 06/20/2017 SHERMAN TX NWS STORM SURVEY A MICROBURST ASSOCIATED WITH A SEVERE THUNDERSTORM CAUSED STRUCTURAL DAMAGE TO A WELL-BUILT WAREHOUSE...SHEDS...A RADIO TOWER...AND IRRIGATION FARMING EQUIPMENT. THE WORST DAMAGE OBSERVED WAS TO A WELL-BUILT WAREHOUSE WITH COMPLETE WALL FAILURE AND A 100 FOOT RADIO TOWER BENT TO A 90 DEGREE ANGLE STARTING NEAR THE BASE. THE DAMAGE PATH ASSOCIATED WITH THE MICROBURST HAD A PATH LENGTH OF 2.1 MILES....A MAXIMUM WIDTH OF 2.3 MILES...AND ENDED AROUND 851 PM CDT. 0900 PM TSTM WND DMG 10 NW SUNRAY 36.12N 101.95W 06/20/2017 SHERMAN TX PUBLIC PATIO ROOF WAS BLOWN OFF AND ALSO RIPPED THE METAL ROOF OFF PART OF THE HOUSE. 0903 PM TSTM WND DMG 16 SSE STRATFORD 36.12N 101.96W 06/20/2017 SHERMAN TX LAW ENFORCEMENT 5 TO 6 POWER POLES BLOWN OVER ONTO F.M. ROAD 1573 7 MILES EAST OF U.S. HIGHWAY 287. 0911 PM TSTM WND DMG 8 NW SUNRAY 36.10N 101.92W 06/20/2017 SHERMAN TX NWS STORM SURVEY A MICROBURST ASSOCIATED WITH A SEVERE THUNDERSTORM DAMAGED CENTER PIVOTS OF IRRIGATION EQUIPMENT AND SNAPPED 13 POWERPOLES. THE DAMAGE PATH ASSOCIATED WITH THE MICROBURST HAD A PATH LENGTH OF 2.3 MILES...A PATH WIDTH OF 2.1 MILES...AND ENDED AROUND 912 PM CDT. 0928 PM HAIL 4 W SUNRAY 36.02N 101.89W 06/20/2017 E0.88 INCH MOORE TX FIRE DEPT/RESCUE
Survey Results:
Public Information Statement National Weather Service Amarillo TX 437 PM CDT Wed Jun 21 2017 ...NWS Damage Survey for June 20th 2017 Microburst Thunderstorm Event... .Microburst #1 11 miles NE Cactus... Peak Wind Estimated: 118 mph Path Length /Statute/: 2.12 miles Path Width /Maximum/: 2.34 miles Fatalities: 0 Injuries: 0 Start Date: Jun 20 2017 Start Time: 8:50 PM CDT Start Location: 11 miles northeast of Cactus Start Lat/Lon: 36.18 / -101.89 End Date: Jun 20 2017 End Time: 8:51 PM CDT End Location: 10 miles north-northwest Sunray End Lat/Lion: 36.16 / -101.87 .Microburst #2 8 miles northwest Sunray... Peak Wind Estimated: 85 mph Path Length /Statute/: 2.3 miles Path Width /Maximum/: 2.1 miles Fatalities: 0 Injuries: 0 Start Date: Jun 20 2017 Start Time: 9:11 PM CDT Start Location: 8 miles northwest Sunray Start Lat/Lon: 36.11 / -101.90 End Date: Jun 20 2017 End Time: 9:12 PM CDT End Location: 10 North-northwest Sunray End Lat/Lion: 36.15 / -101.88 A supercell thunderstorm moved southward across Sherman County during the evening hours of June 20th. As the supercell neared the southern end of the county it produced two microbursts. The first microburst was approximately 2.5 miles north-northwest of the intersection of FM 1573 and County Road 17 at 8:50 PM CDT. The second microburst occurred roughly at 9:11 PM CDT 2.75 miles south-southwest of the intersection of County road 17 and FM 1573. Damage associated with the first microburst included: a west facing wall and attached ceiling section were knocked down on a well build warehouse at Spurlock Farms, smaller nearby sheds had parts or the entire roof blown off, a 100ft radio tower was bent 90 degrees at the ground, and center pivot points of irrigation systems had been tipped over. Damage associated with the second microburst were, center pivot points of irrigation systems had been tipped on their side and 12 to 13 power poles snapped at their base. The storm would continue south southeast into Moore County. NOTE: The information in this statement is preliminary and subject to change pending final review of the event and publication in NWS storm data.
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