Moderate to heavy showers persisted for long enough during the morning of the 27th across portions of southwest Oklahoma to cause some localized flooding. One report of flooding was received between Lawton and Cache.
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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 OUN wrote it up.
Moderate to heavy showers persisted for long enough during the morning of the 27th across portions of southwest Oklahoma to cause some localized flooding. One report of flooding was received between Lawton and Cache. The intersection of NW Cache Rd and NW Airport Rd was reported to be flooded and impassible.
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 Norman, OK wrote its last area forecast discussion before the first event at Sep 27, 4:31 AM CST, 19 minutes earlier.
Area Forecast Discussion National Weather Service Norman OK 531 AM CDT Wed Sep 27 2017 ...Aviation Discussion... && .AVIATION... For the 12z TAFs: VFR conditions will be limited to north-central Oklahoma airports (including PNC), but all other areas will see at least MVFR conditions lasting for much of the day. Widespread rain is occurring with a narrow band of enhanced rainfall rates causing reduced visibilities roughly near/parallel Interstate 44. Visibility reductions due to heavy rain could persist for much of the morning near and north of I-44, mainly across southwest Oklahoma. Ceilings may vary but should generally improve from MVFR/IFR to VFR by this evening. && .PREV DISCUSSION... /issued 349 AM CDT Wed Sep 27 2017/ DISCUSSION... Widespread rain continues across portions of the area early this morning. Some higher rates were observed overnight in the vicinity of Wichita Falls and Fredrick prompting a few Flood Advisories, but overall flooding has probably been minor based on amounts estimated by radar and duration. Up to an inch of additional rain will be possible today, primarily across a small section of southwest Oklahoma where deepest moisture best aligns with strongest ascent seen on 300-310K isentropic surfaces. This should not cause significant flooding concerns. Current plans are to let the Flood Watch continue for a little while longer and then as heavier rainfall rates shift northward, we may be able to cancel all or at least part of the watch early. We have categorical/definite probabilities of light/moderate rain across a fairly large area this morning from western north Texas through southwest Oklahoma into portions of central Oklahoma. There is enough isentropic ascent to keep light rain going through much of the morning before gradually decreasing later this afternoon and evening as low level flow relaxes and veers slightly. The large scale pattern doesn't change much through the end of the week. Anomalous moisture will remain over the area within a band of southwesterly flow aloft ahead of Southwest closed low. Models handle the northeastward movement of this low up into the central Rockies by Friday. Slight enhancement of upper jet at the base of eastern Canada trough and some weakening on its western end as Rockies low fills slightly may position the jet's right entrance in a favorable position for subtle lift and additional precipitation Thursday. There are hints of a weak shortwave trough within the southwesterly flow aloft as well. We have raised precipitation probabilities across western portions of the area Thursday/Thursday night, and then spread low probabilities eastward into central Oklahoma on Friday. Dry weather is expected Saturday and and Sunday. There are still consistency and agreement issued in medium range guidance that leads to a below average confidence forecast from late Sunday into early next week. Showers and storms should mostly stay north of our area in Kansas Sunday/Monday considering a mean position/amplification of mid-upper trough. ECMWF is quicker with the lead wave and overall less amplified with the main trough, while GFS and most of its ensembles are more amplified and thus more aggressive with southward push of the cold front and convective chances into our area. All models generally strengthen upper ridging by mid week bringing an above normal but dry pattern to the area. BRB && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 65 58 73 58 / 100 10 10 10 Hobart OK 64 58 70 58 / 100 30 20 20 Wichita Falls TX 68 60 73 60 / 90 30 50 50 Gage OK 64 52 67 52 / 50 20 20 20 Ponca City OK 68 56 75 55 / 70 10 10 0 Durant OK 81 64 80 61 / 30 20 20 20 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...Flood Watch through this evening for OKZ035>038-044. TX...Flood Watch through this evening for TXZ083>089. && 03/12
Hazardous Weather Outlook National Weather Service Norman OK 455 AM CDT Wed Sep 27 2017 OKZ004>048-050>052-TXZ083>090-281000- Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield- Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne- Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain- Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson- Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton- Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman- Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay- 455 AM CDT Wed Sep 27 2017 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Through Tonight... .Heavy Rain/Flooding... Heavy rainfall may lead to flooding across portions of northern Texas and southwest Oklahoma today. A Flood Watch is in effect for this area. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... .Thunderstorms... Low thunderstorm chances are expected Thursday and Friday across portions of western Oklahoma and north Texas. Severe weather is not expected. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook.
The Altus AFB radar (KFDR), 45 km away, was scanning. The volume nearest the first event began at 10:48 UTC.
2 flash flood. Local standard time, as filed.
A report was relayed by broadcast media that the intersection of NW Cache Rd and NW Airport Rd was flooded and impassible.
A report was relayed by broadcast media of flooding at the intersection of 53rd and Gore Blvd. Water was reported to be coming into a vehicle at this intersection.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oklahoma in 2017Every state in 2017This day in weather historyWarnings in Oklahoma, 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: 722812, 722813.