As the previous evening's storm system made it's way southward, heavy rain rates resulted in some minor flooding early on the 10th.
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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.
As the previous evening's storm system made it's way southward, heavy rain rates resulted in some minor flooding early on the 10th.
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 Aug 9, 11:20 PM CST, 3 hours 58 minutes earlier.
Area Forecast Discussion National Weather Service Norman OK 1220 AM CDT Thu Aug 10 2017 ...Aviation Discussion... && .AVIATION... For the 06z TAFs: A band of convection is moving southeast through northern Oklahoma as of this writing (shortly before 06z). A weakening trend has been noted and this is a result of decreasing instability. Occasional lightning strikes have been observed, particularly on its western end, near Kingfisher and Watonga. Further weakening is expected as these storms approach airports in/around OKC, although the convection may maintain its intensity long enough for brief visibility reduction due to heavy downpours and possibly an occasional lightning strikes. Despite weakening instability, veering low level flow and advection of greater moisture from the west toward dawn may support showers near OKC/OUN for several more hours. Some diurnal re-development is expected across about the northern half of Oklahoma during the afternoon, but showers/storms should be isolated/scattered. Toward the very end of the TAF period an MCS with heavy rain and potentially strong winds is expected impact several TAF sites. Outside of strong gusty winds and temporary vis/ceiling reduction in/near storms, VFR conditions and light winds should prevail. && .PREV DISCUSSION... /issued 812 PM CDT Wed Aug 9 2017/ UPDATE... Area of showers/storms in N OK and S KS is expected to continue to move SE across portions of the area this evening. Increased PoPs to account for this activity. A few of the storms in N OK could be strong to severe. PREV DISCUSSION... /issued 634 PM CDT Wed Aug 9 2017/ AVIATION... 0Z TAFs - Several rounds of scattered showers/storms are possible across portions of the area during this TAF period with the highest chances in northern Oklahoma. Chances are currently too low at some sites for mention in TAF. Gusty winds and heavy rain will be possible with the storms. PREV DISCUSSION... /issued 347 PM CDT Wed Aug 9 2017/ DISCUSSION... Thunderstorms persist over northern Oklahoma and will continue into the early evening. This is the first of what may be at least two waves of storms. HRRR suggests the possibility of another round of storms moving into northwest Oklahoma this evening, although other models aren't as aggressive with this. Then there is a higher chance of storms in the morning hours with storms moving in from Colorado and/or western Kansas. An even higher chance of storms returns late tomorrow afternoon or tomorrow evening as a storm complex is expected to develop in southern Kansas or near the Oklahoma border and moving south/southeast through the area with the highest precipitation chances northeast. With the surface boundary lurking north of the area, west- northwest flow aloft, and various shortwaves moving into the upper Midwest and central Plains, it looks like we will be in a pattern of multiple rounds of convection over the next few days with storm complexes moving into Oklahoma from the north. It is still tricky to determine specific geography too far in advance, but we do appear to be in a wet pattern, especially by August standards. && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 92 72 88 73 / 20 60 50 60 Hobart OK 96 74 94 75 / 20 40 30 40 Wichita Falls TX 97 76 98 78 / 10 20 20 20 Gage OK 92 68 85 70 / 30 70 30 60 Ponca City OK 88 70 85 70 / 30 70 40 60 Durant OK 92 75 93 75 / 10 20 40 40 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && 17/12
Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 1100 PM CDT Wed Aug 9 2017 OKZ004>048-050>052-TXZ083>090-110400- 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- 1100 PM CDT Wed Aug 9 2017 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Rest of Tonight... .Thunderstorms... Showers and thunderstorms will continue to move across portions of northern and central Oklahoma overnight into early Thursday. Heavy rain and cloud to ground lightning will be the main concerns. However, wind gusts up to 50 mph could be possible with some of the strongest storms. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... .Heavy Rain/Flooding... Thunderstorms may produce heavy rainfall across the area Thursday through early next week. Several inches of rainfall may occur across parts of Oklahoma which may result in flooding. .Thunderstorms... Thunderstorms will be possible each day. A few strong to severe thunderstorms with damaging winds will be possible at times, especially Thursday night across northern Oklahoma, but widespread significant severe weather is not expected. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1040 PM CDT WED AUG 9 2017
OKZ018-100415-
Kingfisher OK-
1040 PM CDT WED AUG 9 2017
...SIGNIFICANT WEATHER ADVISORY FOR northwestern Kingfisher County
Until 1115 PM CDT...
AT 1037 PM CDT, a strong thunderstorm was located 9 miles south of
Ames, moving southeast at 15 MPH.
HAZARDS INCLUDE...
Wind gusts to 40 MPH...
Locations impacted include...
Loyal and Lacey.
LAT...LON 3601 9791 3595 9817 3609 9821 3612 9821
3617 9810 3617 9804
TIME...MOT...LOC 0337Z 322DEG 15KT 3611 9814
WRSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1104 PM CDT WED AUG 9 2017
OKZ011-015-017-100430-
Major OK-Dewey OK-Blaine OK-
1104 PM CDT WED AUG 9 2017
...SIGNIFICANT WEATHER ADVISORY FOR south central Major...
northeastern Dewey and northern Blaine Counties Until 1130 PM CDT...
AT 1104 PM CDT, a strong thunderstorm was located near Longdale,
moving southeast at 30 MPH.
HAZARDS INCLUDE...
Wind gusts to 40 MPH...
Minor flooding in areas of poor drainage...
Locations impacted include...
Fairview, Okeene, Canton, Longdale, Oakwood, Canton Lake, Eagle City,
Homestead and Southard.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Severe weather is not expected and no warnings are anticipated at
this time.
&&
LAT...LON 3617 9830 3607 9821 3603 9821 3587 9876
3614 9873 3627 9856
TIME...MOT...LOC 0403Z 314DEG 25KT 3616 9857
MBSSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1125 PM CDT WED AUG 9 2017
OKZ017-100500-
Blaine OK-
1125 PM CDT WED AUG 9 2017
...SIGNIFICANT WEATHER ADVISORY FOR Blaine County Until midnight
CDT...
AT 1125 PM CDT, a strong thunderstorm was located 7 miles west of
Hitchcock, moving southeast at 35 MPH.
HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...
Locations impacted include...
Watonga, Okeene, Canton, Hitchcock, Greenfield, Eagle City, Homestead
and Southard.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Severe weather is not expected and no warnings are anticipated at
this time.
&&
LAT...LON 3616 9825 3578 9821 3565 9863 3604 9864
3617 9846
TIME...MOT...LOC 0422Z 327DEG 30KT 3599 9847
MBSSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1159 PM CDT WED AUG 9 2017
OKZ017-018-023-024-100530-
Kingfisher OK-Canadian OK-Caddo OK-Blaine OK-
1159 PM CDT WED AUG 9 2017
...SIGNIFICANT WEATHER ADVISORY FOR southwestern Kingfisher...
northwestern Canadian...north central Caddo and southeastern Blaine
Counties Until 1230 AM CDT...
AT 1158 PM CDT, a strong thunderstorm was located near Greenfield,
moving southeast at 30 MPH.
HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...
Locations impacted include...
Watonga, Hinton, Geary, Calumet, Bridgeport, Greenfield and Omega.
This includes Interstate 40 between mile markers 96 and 113.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Severe weather is not expected and no warnings are anticipated at
this time.
&&
LAT...LON 3586 9849 3591 9820 3570 9800 3555 9809
3541 9846
TIME...MOT...LOC 0458Z 335DEG 26KT 3575 9835
MBSThe Norman radar (KTLX), 68 km away, was scanning. The volume nearest the first event began at 09:19 UTC.
1 flash flood. Local standard time, as filed.
Car stalled out from excessive water on roads at the intersection of Dakota Ave and highway 81/277.
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, August 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: 719771.