Isolated thunderstorms occurred due to strong daytime heating and atmospheric instability, sufficient moisture and close proximity of a sfc trof. A late report of a damage was recieved.
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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.
Isolated thunderstorms occurred due to strong daytime heating and atmospheric instability, sufficient moisture and close proximity of a sfc trof. A late report of a damage was recieved.
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 Jun 8, 7:21 PM CST, 1 hour 39 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Amarillo TX 821 PM CDT Fri Jun 8 2018 .DISCUSSION... Think we may be in for a repeat performance of sorts of last night. An outflow boundary is slowly moving west and will meet up with convection as it moves into the NW Panhandles. This may invigorate this line of storms briefly, but SFC analysis again shows an area of SFC divergence east of the boundary that should weaken and greatly limit coverage of storms that make it much out of the western column of COs. The HRRR basically shows this is exactly what happens despite the favorable H7 theta-e ridge across the WRN half. Have updated to raise POPs in the NW but decreased or eliminated POPs in the east. Can't totally rule out a storm making it to AMA or outflow causing a storm to develop near AMA similar to last night, but it is not looking very promising. && .AVIATION... Main concern for the period continues to be potential for storms to impact the TAF sites in the evening/overnight periods tonight and again Saturday. DHT is most likely location to be impacted, and have included tstms in TAF their tonight. Chances are not high enough for mention any other location attm. && .PREV DISCUSSION... /Issued 359 PM CDT Fri Jun 8 2018/ SHORT TERM... Outflow from this morning's thunderstorm activity with increasing pressure gradients resulting from it has kept winds elevated through the morning and early afternoon hours. Surface analysis still shows the dryline currently set up in eastern New Mexico with dewpoints in the 50s and 60s across the entire region. This, along with an upper level shortwave trof is riding over the ridge this afternoon, will serve as a focal point for thunderstorm development. More isolated thunderstorm development is possible along the westward advancing outflow boundary now just east of Amarillo to near Perryton. Timeframe for any convection favors the late afternoon and evening hours, with most activity expected to be in the western Panhandles by around 6 PM CDT and persisting through about midnight. A few storms are already developing in the Raton Mesa vicinity as of 2000z. Storm motions will be a bit slow, as morning sounding indicates steering flow will be roughly 5 to 15 kts from the west to southwest. Given this slow storm motion, thunderstorm activity will have difficulty making it into the eastern Panhandles. Any storms that develop will be working with a dry surface boundary layer and, if the sounding is modified for current conditions, presents with DCAPE values that exceed 1600 J/kg. As a result, hazards with any thunderstorms will be wind for short-lived storms and those that cluster into linear modes, and hail should any storm maintain a pronounced updraft for a prolonged period of time. Storms could be strong to severe given the hazards analyzed. Updates were made to PoP grids to refocus best chances out west, wind grids due to increased pressure gradients, and dewpoint temperatures to account for present trends. Bieda/Ward LONG TERM... Broad upper level trough currently advancing towards the Pac NW coast is progged to stall over the Great Basin for the next few days. The mid level ridge is currently centered over southeast New Mexico and is not expected to change much through Saturday. This will keep the Panhandles in weak zonal to northwest flow aloft. For Saturday, temperatures should be similar to Friday, if not a few degrees cooler. Convection will be possible in the western zones in response to a subtle perturbation riding around the ridge in the region of the surface trough. While convective inhibition does not look to be a major issue, storms will be fighting some dry air entrainment in the H5 to H3 region based on latest model soundings. Otherwise, a few storms could become strong with high- based MLCAPE around 1000 J/kg and steep low level lapse rates. Shear does not look impressive given weak mid- level winds, so large hail does not look likely. Downdraft winds would be the the main possibility with single cell to perhaps multicell modes. Deterministic guidance slowly advances the Great Basin trough eastward as it takes on a negative tilt Sunday. While the main trough stays well north and northwest of the Panhandles, there is indication of a shortwave ahead and south of the trough that crosses the Panhandles. The timing of this feature will largely determine when and who might see some thunderstorm development. It does look like a more defined dryline tries to take shape as lee cyclogenesis begins in eastern CO Sunday afternoon. The dryline would be the main area of concern for convective initiation with around 1000 to 1500 high-based MLCAPE and weak shear given overall weak kinematic field. There some veering in the lowest 500mb which may lend to some organization at times. Thus, storms should be of pulse nature to perhaps some multicell clusters with wind and hail being the main threat. The aforementioned surface low ejects east into KS/NE with trailing cold front on Sunday night into Monday. There are differences on how far the front will advance before stalling, so Monday will be tricky on both temperatures and pops. For now confined pops to the southeast zones where better moisture is expected and kept temperatures coolest in the northern zones. The ridge starts to re-center over west Texas as zonal flow dominates the northern plains. Temperatures are expected to surge back up into the upper 90s to near 100 Tuesday into the middle of next week. Differences in the guidance abound especially beyond Wednesday. The overall trend, however, is hot and mostly dry. Ward && .AMA Watches/Warnings/Advisories... TX...None. OK...None. && 88/88
Hazardous Weather Outlook National Weather Service Amarillo TX 411 PM CDT Fri Jun 8 2018 OKZ001>003-TXZ001>020-317-090915- 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- 411 PM CDT Fri Jun 8 2018 This Hazardous Weather Outlook is for the Texas and Oklahoma Panhandles. .DAY ONE...Tonight. Isolated to scattered thunderstorms are expected to develop across mainly the western Oklahoma and Texas Panhandles this afternoon and evening. The strongest storms that develop will have the potential to become strong to marginally severe, with isolated strong winds and large hail the primary hazards. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Thunderstorms will be possible across parts of the Oklahoma and Texas Panhandles Saturday evening, Sunday afternoon and evening, Monday evening, and Tuesday evening. Some storms that form will have the potential to become strong to marginally severe, with damaging winds and large hail the primary hazards. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated at this time.
Special Weather Statement
National Weather Service Amarillo TX
859 PM CDT FRI JUN 8 2018
OKZ001-TXZ001-090245-
Cimarron OK-Dallam TX-
859 PM CDT FRI JUN 8 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CIMARRON AND DALLAM
COUNTIES UNTIL 945 PM CDT...
At 859 PM CDT, Doppler radar was tracking a strong thunderstorm 10
miles southeast of Seneca, or 11 miles northeast of Clayton, moving
southeast at 25 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Texline, Ware and Felt.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take shelter in a sturdy building if threatening weather approaches.
&&
LAT...LON 3650 10304 3650 10300 3668 10300 3650 10245
3632 10242 3606 10259 3606 10304
TIME...MOT...LOC 0159Z 305DEG 20KT 3653 10299
MJGSpecial Weather Statement
National Weather Service Amarillo TX
938 PM CDT FRI JUN 8 2018
TXZ001-002-006-090330-
Hartley TX-Sherman TX-Dallam TX-
938 PM CDT FRI JUN 8 2018
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SHERMAN...EASTERN
DALLAM AND HARTLEY COUNTIES UNTIL 1030 PM CDT...
At 938 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 14 miles northwest of Conlen to 6 miles north
of Dalhart to 10 miles south of Ware to 10 miles east of Amistad.
Movement was southeast at 20 mph.
Penny size hail and wind gusts of 50 to 55 mph will be possible with
these storms.
Locations impacted include...
Dalhart, Stratford, Hartley, Romero and Conlen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take shelter in a sturdy building if threatening weather approaches.
&&
LAT...LON 3601 10304 3610 10277 3622 10258 3650 10245
3650 10236 3636 10198 3605 10213 3605 10216
3599 10216 3591 10220 3580 10239 3569 10270
3565 10304
TIME...MOT...LOC 0238Z 314DEG 19KT 3640 10240 3615 10250 3604 10269
3594 10296
MJGThe Amarillo radar (KAMA), 117 km away, was scanning. The volume nearest the first event began at 03:03 UTC.
1 thunderstorm wind. Local standard time, as filed.
Delayed report. A few tree limbs down in downtown Dalhart. Time estimated based on KDHT wind observation.
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, June 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: 771074.