A series of outflow boundaries in a high MUCAPE/DCAPE and low bulk shear environment produced pulse storms in which one collapsed over parts of Gray County, TX producing a severe wind gusts with reported damage.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS AMA wrote it up.
A series of outflow boundaries in a high MUCAPE/DCAPE and low bulk shear environment produced pulse storms in which one collapsed over parts of Gray County, TX producing a severe wind gusts with reported damage.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Amarillo, TX wrote its last area forecast discussion before the first event at Jul 14, 2:40 PM CST, 1 hour 50 minutes earlier.
Area Forecast Discussion National Weather Service Amarillo TX 340 PM CDT Sat Jul 14 2018 .DISCUSSION... .Short Term (Tonight through Sunday)... As has been the case the past several days, old outflow boundaries and differential heating areas cause by morning cloud shields are providing focus for initial TSTM development as region reaches convective temps. PWs were 1.5 inches this morning, so no lack of moisture, esp in h7 to h5 layer per 12z AMA sounding. So ISO to SCT very disorganized TSTMS are anticipated across the entire area this aftn and into the overnight, but the SRN half is favored for highest rain chc based on location of deepest moisture, expectation of storms firing along SW to NE boundary bisecting the area with SSE storm motion, and location of the weakness in the ridge that remains over the area. Again, storms will have potential to produce a quick 1/2 to 1 1/2" rainfall for the lucky ones (see AMA area yesterday). Panhandles remain in the saddle, so to speak, as a weakness between two H5-H2 high centers (east and west of the region) continues over the area through Sunday. H7 theta-e values are only slightly lower but remain AOA 340k most areas which suggest another day with ISO to SCT TSTMS as we hit convective temps. Tough to favor one area over another as boundaries and edges of cloud shields end up providing initial focus for storms, but CEN areas may have edge once again based on similar logic to this aftn (see above). Heavy rainfall and dangerous lightning will again be main threats given lack of shear and uninspiring mid level lapse rates given -4 to -6 deg c H5 temps. MJG .Long Term (Sunday Night through Friday)... Weakness in the upper flow continues across the Panhandles Sunday night with the upper high over the northern Gulf Coast states and another upper high over the Four Corners region and southwestern states prevail. The upper high over the northern Gulf states begins to build back to the west and north Monday and Monday night towards the Panhandles allowing for much drier air to advect into the forecast area by Tuesday and the current moisture plume to shift westward across the Great Basin and southwestern states. As the upper high builds in over the Panhandles Tuesday through the end of next week, much warmer and drier conditions can be expected. Max temps will be approaching 100 to 106 degrees by the middle and end of next week. A Heat Advisory may become necessary for Palo Duro Canyon next Wednesday through Next Friday and Saturday. Schneider && .PRELIMINARY POINT TEMPS/POPS... Amarillo TX 68 93 69 93 69 / 30 30 20 20 10 Beaver OK 68 95 71 94 70 / 20 20 20 40 30 Boise City OK 65 92 67 89 67 / 20 20 20 30 30 Borger TX 70 96 72 94 72 / 30 40 20 20 20 Boys Ranch TX 68 95 69 94 69 / 30 30 20 20 20 Canyon TX 67 92 69 94 68 / 30 20 20 20 10 Clarendon TX 69 93 70 94 70 / 30 20 20 10 10 Dalhart TX 63 92 67 92 66 / 30 20 30 20 30 Guymon OK 66 93 69 92 68 / 20 20 20 30 30 Hereford TX 67 93 68 92 67 / 30 20 20 20 10 Lipscomb TX 70 96 71 94 71 / 30 30 20 40 30 Pampa TX 68 93 69 91 69 / 30 40 20 20 20 Shamrock TX 70 94 72 96 72 / 30 20 20 20 10 Wellington TX 70 95 73 99 73 / 30 20 20 10 10 && .AMA Watches/Warnings/Advisories... TX...None. OK...None. && 88/11
Hazardous Weather Outlook National Weather Service Amarillo TX 316 PM CDT Sat Jul 14 2018 OKZ001>003-TXZ001>020-317-151100- Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb- Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson- Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth- Palo Duro Canyon- 316 PM CDT Sat Jul 14 2018 This Hazardous Weather Outlook is for the Texas and Oklahoma Panhandles. .DAY ONE...Tonight. Thunderstorms will be possible across the Texas and Oklahoma Panhandles through tonight. Lightning, localized flooding from heavy rain, and gusty winds will be the main hazards. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Thunderstorms will be possible across most of the Texas and Oklahoma Panhandles through Monday night. Lightning, localized flooding from heavy rain, and gusty winds will be the main hazards. A Heat Advisory may be needed for Palo Duro Canyon Wednesday through Friday as high temperatures reach 105 to 106 degrees each afternoon. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated at this time. Schneider
Special Weather Statement National Weather Service Amarillo TX 316 PM CDT SAT JUL 14 2018 TXZ009-010-014-015-142100- Hemphill TX-Gray TX-Wheeler TX-Roberts TX- 316 PM CDT SAT JUL 14 2018 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN WHEELER...NORTHEASTERN GRAY...SOUTHEASTERN ROBERTS AND HEMPHILL COUNTIES UNTIL 400 PM CDT... At 313 PM CDT, Doppler radar was tracking a strong thunderstorms near Lake Marvin, Canadian and Miami, moving northeast at 10 mph. Dime size hail, torrential rainfall and wind gusts up to 50 mph will be possible with these storms. Locations impacted include... Canadian, Miami, Briscoe, New Mobeetie, Lora, Allison, Lake Marvin and Mobeetie. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take shelter in a sturdy building if threatening weather approaches. && LAT...LON 3543 10069 3591 10076 3605 10000 3559 10000 TIME...MOT...LOC 2013Z 238DEG 7KT 3577 10014 MJG
The Amarillo radar (KAMA), 77 km away, was scanning. The volume nearest the first event began at 22:31 UTC.
2 thunderstorm wind. Local standard time, as filed.
Part of a roof blown off a new barn, some brick damage to a church, a couple large tree limbs down, and a few leaning power poles. Time estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2018Every state in 2018This day in weather historyWarnings in Texas, July 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 773874, 773876.