An upper low was located over southern Utah with strong southwest flow aloft. Low level winds were out of the east bringing in good low level moisture to the region as dew points were into the lower 60s.
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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 EPZ wrote it up.
An upper low was located over southern Utah with strong southwest flow aloft. Low level winds were out of the east bringing in good low level moisture to the region as dew points were into the lower 60s. Thunderstorms developed around 2AM over western El Paso county and trained over the area for several hours producing rainfall amounts of 2 to over 4 inches in just a few hours which lead to flash flooding.
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 El Paso, TX wrote its last area forecast discussion before the first event at Sep 27, 2:36 PM MST, 12 hours 43 minutes earlier.
Area Forecast Discussion National Weather Service El Paso Tx/Santa Teresa NM 336 PM MDT Wed Sep 27 2017 .SYNOPSIS... Upper low over western Arizona will slowly lift north to the northern Rocky Mountains by Friday. The southerly flow aloft ahead of this low, combined with moist low level east flow will keep the clouds, cool temperatures and scattered thunderstorms going through Friday. A few of these storms could become severe with large hail and damaging winds. The low moves into the northern plains Saturday and Sunday, allowing drier air and warmer temperatures to return. && .DISCUSSION... Longwave trough persisting over the central Rockies down to Arizona. Main upper low within the trough now over northwest Arizona, with several weak short waves ejecting out of it. One wave swept across central New Mexico this morning, producing a few thunderstorms through the central CWA. Another wave is slowly drifting into eastern Arizona at this time, with some convection forming just ahead of the trough over far western New Mexico. Further south, over the bootheel and northern Mexico, plenty of sunshine has helped reach convective temperatures, and hence plenty of CU has formed in theses areas, along with a few thunderstorms. Tonight through Friday...models showing conditions mostly unchanged. Upper low is into southern Utah Thursday and into western Wyoming Friday, with axis of upper trough remaining to our west. This will allow south/southwest flow aloft to continue bringing in tropical moisture. At low levels, stout east winds will continue with several pushes of moisture coming in. Expect widespread showers/thunderstorms to continue. PWs will remain around 1 inch and with MUCAPEs of 500-1500 J/kg both days. With PWs still over an inch tonight, and short waves moving into western New Mexico, will keep Flash Flood Watch going through tonight for the central CWA. Saturday through Monday...as upper low lifts up into eastern Montana, the upper trough axis will begin pulling through the area mid day Saturday. Still a slight risk of thunderstorms early, with skies clearing by late afternoon. Sunday and Monday look quite pleasant with very few clouds and temperatures back to near normal. Tuesday and Wednesday...once the upper trough lifts out of area, sub-tropical high builds back in over much of the southern U.S. This will increase mid level southeast winds, and upper level south/southwest winds. GFS continues to show some tropical moisture moving up in this flow for a chance of thunderstorms. With PWs increasing back to over 1 inch, some flooding may be possible. && .AVIATION...Valid 28/00Z-29/00Z... P6SM SCT-BKN020-030 BKN040-060 across all areas through period. Scattered to numerous 1-3SM TSRA BKN020-030 or 5SM -SHRA BKN010-020 off and on with heaviest precipitation along and west of Rio Grande Valley. Winds generally east to southeast 5-15G25KTS. && .FIRE WEATHER... Upper low over Arizona will begin to lift northeast through the next 24 hours. Expect scattered to numerous showers and thunderstorms over area, especially west of Rio Grande. Temperatures over coming days will be below normal with relative humidities above 40 percent lowlands and above 45 percent mountains. Some storms may be strong or severe with localized flash flooding also possible. Drier, warmer air will start moving in late Saturday and Sunday with above normal temperatures expected early next week. Besides some breezy conditions next couple of days, expect winds to be less than 15 mph. && .PRELIMINARY POINT TEMPS/POPS... El Paso 62 74 63 73 / 40 50 40 30 Sierra Blanca 56 70 57 68 / 40 40 40 40 Las Cruces 58 72 58 72 / 70 50 40 30 Alamogordo 55 72 56 75 / 40 50 50 40 Cloudcroft 46 52 45 51 / 60 60 60 50 Truth or Consequences 55 71 55 73 / 80 60 60 40 Silver City 52 70 54 70 / 70 40 40 30 Deming 55 72 56 73 / 80 40 50 30 Lordsburg 56 74 57 76 / 40 30 20 20 West El Paso Metro 63 73 63 71 / 50 50 40 40 Dell City 57 71 59 71 / 40 40 40 30 Fort Hancock 61 76 63 72 / 40 40 40 30 Loma Linda 56 69 55 64 / 40 40 50 30 Fabens 60 75 61 72 / 40 40 40 30 Santa Teresa 59 73 61 72 / 60 50 40 40 White Sands HQ 59 70 59 71 / 60 50 40 40 Jornada Range 57 72 58 73 / 70 60 50 40 Hatch 58 73 58 74 / 80 60 50 40 Columbus 57 74 58 74 / 80 40 40 30 Orogrande 58 72 59 73 / 40 50 40 40 Mayhill 50 56 50 54 / 70 60 70 50 Mescalero 51 61 51 61 / 60 60 60 50 Timberon 50 58 48 59 / 60 60 60 50 Winston 48 67 48 65 / 80 60 60 40 Hillsboro 53 71 53 70 / 80 60 60 40 Spaceport 55 71 56 73 / 80 60 50 40 Lake Roberts 48 72 49 70 / 60 40 40 30 Hurley 52 70 54 69 / 70 40 50 30 Cliff 53 74 53 78 / 40 30 30 30 Mule Creek 53 76 54 76 / 30 30 20 30 Faywood 53 71 54 70 / 80 40 50 30 Animas 55 75 57 78 / 30 20 20 20 Hachita 54 74 56 74 / 60 30 30 30 Antelope Wells 55 75 56 77 / 30 20 20 20 Cloverdale 53 76 55 75 / 20 20 10 20 && .EPZ WATCHES/WARNINGS/ADVISORIES... NM...Flash Flood Watch through late tonight for NMZ402-403-407>411. TX...None. && Hefner/Grzywacz
Hazardous Weather Outlook National Weather Service El Paso Tx/Santa Teresa NM 1145 AM MDT Wed Sep 27 2017 NMZ401>417-TXZ418>424-281745- Upper Gila River Valley-Southern Gila Highlands/Black Range- Southern Gila Foothills/Mimbres Valley- Southwest Desert/Lower Gila River Valley-Lowlands of the Bootheel- Uplands of the Bootheel-Southwest Desert/Mimbres Basin- Eastern Black Range Foothills-Sierra County Lakes- Northern Dona Ana County-Southern Dona Ana County/Mesilla Valley- Central Tularosa Basin-Southern Tularosa Basin- West Slopes Sacramento Mountains Below 7500 Feet- Sacramento Mountains Above 7500 Feet- East Slopes Sacramento Mountains Below 7500 Feet-Otero Mesa- Western El Paso County-Eastern/Central El Paso County- Northern Hudspeth Highlands/Hueco Mountains-Salt Basin- Southern Hudspeth Highlands- Rio Grande Valley of Eastern El Paso/Western Hudspeth Counties- Rio Grande Valley of Eastern Hudspeth County- 1145 AM MDT Wed Sep 27 2017 This Hazardous Weather Outlook is for portions of south central New Mexico, southwest New Mexico, and southwest Texas. .DAY ONE...This Afternoon and Tonight. Widespread showers and thunderstorms. A few thunderstorms could produce large hail up to 1.25 inches and wind gusts to 60 mph. Flash flooding is also possible, mainly west of the Rio Grande Valley. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Scattered thunderstorms Thursday and Friday, with a few possibly producing large hail and damaging winds. Isolated thunderstorms Saturday and Sunday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. Hefner
The El Paso radar (KEPZ), 11 km away, was scanning. The volume nearest the first event began at 10:19 UTC.
1 flash flood. Local standard time, as filed.
Water was knee deep at the intersection of Doniphan and Talbot making the road impassable. Water entered several businesses in this area including Tamales Lupita. Additional deep flooding was reported at the intersection of Doniphan and Redd Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2017Every state in 2017This day in weather historyWarnings in Texas, September 2017
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: 722185.