Scattered storms formed from Kansas down into northern Oklahoma late on the 9th as an upper level trough made it's way overhead, with a few of the storms producing severe winds.
Every event with a place to put it. Tap one for its entry below.
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.
Scattered storms formed from Kansas down into northern Oklahoma late on the 9th as an upper level trough made it's way overhead, with a few of the storms producing severe winds.
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, 7:12 PM CST, 1 hour 13 minutes earlier.
Area Forecast Discussion...UPDATED National Weather Service Norman OK 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 70 92 72 88 / 30 20 60 50 Hobart OK 71 96 74 94 / 20 20 40 30 Wichita Falls TX 71 97 76 98 / 10 10 20 20 Gage OK 67 92 68 85 / 40 30 70 30 Ponca City OK 69 88 70 85 / 70 30 70 40 Durant OK 70 92 75 93 / 10 10 20 40 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && 25/25
Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 748 PM CDT Wed Aug 9 2017 OKZ004>048-050>052-TXZ083>090-110100- 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- 748 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... .Heavy rain/flooding... Showers and thunderstorms may produce locally heavy rainfall and flooding tonight, mainly across northern Oklahoma. .Thunderstorms... Scattered thunderstorms will remain possible across portions of northern and central Oklahoma tonight. A few of the storms, mainly in northern Oklahoma, this evening could become strong to severe with hail up to the size of half dollars and wind gusts to 60 mph possible. .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
737 PM CDT WED AUG 9 2017
OKZ010-100100-
Woodward OK-
737 PM CDT WED AUG 9 2017
...SIGNIFICANT WEATHER ADVISORY FOR west central Woodward County
Until 800 PM CDT...
AT 735 PM CDT, a strong thunderstorm was located 6 miles northwest of
Woodward, moving southeast at 25 MPH.
HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 40 MPH...
Minor flooding in areas of poor drainage...
Locations impacted include...
Woodward.
LAT...LON 3646 9920 3634 9935 3652 9956 3660 9949
3660 9938
TIME...MOT...LOC 0035Z 308DEG 24KT 3651 9946
WRSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 757 PM CDT WED AUG 9 2017 OKZ007-008-012-013-100130- Garfield OK-Kay OK-Grant OK-Noble OK- 757 PM CDT WED AUG 9 2017 ...SIGNIFICANT WEATHER ADVISORY FOR northeastern Garfield... southwestern Kay...southeastern Grant and northwestern Noble Counties Until 830 PM CDT... AT 756 PM CDT, a strong thunderstorm was located 6 miles west of Lamont, moving southeast at 25 MPH. HAZARDS INCLUDE... Hail up to the size of nickels... Wind gusts to 40 MPH... Minor flooding in areas of poor drainage... Locations impacted include... Lamont and Hunter. This includes Interstate 35 between mile markers 207 and 208. LAT...LON 3664 9780 3677 9765 3658 9730 3650 9765 TIME...MOT...LOC 0056Z 311DEG 21KT 3666 9766 WR
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
758 PM CDT WED AUG 9 2017
OKZ007-100130-
Grant OK-
758 PM CDT WED AUG 9 2017
...SIGNIFICANT WEATHER ADVISORY FOR northeastern Grant County Until
830 PM CDT...
AT 756 PM CDT, a strong thunderstorm was located 6 miles north of
Wakita, moving southeast at 25 MPH.
HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 40 MPH...
Minor flooding in areas of poor drainage...
Frequent cloud to ground lightning...
Locations impacted include...
Medford, Wakita and Renfrow.
LAT...LON 3690 9753 3678 9782 3695 9800 3700 9797
3700 9773
TIME...MOT...LOC 0056Z 309DEG 20KT 3697 9789
WRSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 829 PM CDT WED AUG 9 2017 OKZ006-007-012-100200- Garfield OK-Alfalfa OK-Grant OK- 829 PM CDT WED AUG 9 2017 ...SIGNIFICANT WEATHER ADVISORY FOR northwestern Garfield...east central Alfalfa and southwestern Grant Counties Until 900 PM CDT... AT 827 PM CDT, a strong thunderstorm was located 4 miles east of Great Salt Plains Lake, moving southeast at 40 MPH. HAZARDS INCLUDE... Wind gusts to 50 MPH... Minor flooding in areas of poor drainage... Locations impacted include... Jet, Nash and Great Salt Plains Lake. LAT...LON 3671 9825 3685 9811 3660 9777 3657 9816 TIME...MOT...LOC 0127Z 309DEG 35KT 3674 9811 WR
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
835 PM CDT WED AUG 9 2017
OKZ006-100200-
Alfalfa OK-
835 PM CDT WED AUG 9 2017
...SIGNIFICANT WEATHER ADVISORY FOR northern Alfalfa County Until 900
PM CDT...
AT 833 PM CDT, a strong thunderstorm was located near Kiowa, moving
southeast at 25 MPH.
HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 40 MPH...
Minor flooding in areas of poor drainage...
Locations impacted include...
Burlington, Amorita, Byron and Driftwood.
LAT...LON 3700 9822 3687 9812 3680 9840 3694 9854
3700 9854
TIME...MOT...LOC 0133Z 310DEG 23KT 3700 9844
WRSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 903 PM CDT WED AUG 9 2017 OKZ007-008-100245- Kay OK-Grant OK- 903 PM CDT WED AUG 9 2017 ...SIGNIFICANT WEATHER ADVISORY FOR southwestern Kay and southeastern Grant Counties Until 945 PM CDT... AT 902 PM CDT, a strong thunderstorm was located 4 miles southeast of Medford, moving southeast at 25 MPH. HAZARDS INCLUDE... Wind gusts to 50 MPH... Minor flooding in areas of poor drainage... Locations impacted include... Medford and Lamont. This includes Interstate 35 near mile marker 210. LAT...LON 3689 9766 3662 9734 3659 9766 3675 9780 TIME...MOT...LOC 0202Z 311DEG 21KT 3677 9766 WR
The Vance AFB radar (KVNX), 41 km away, was scanning. The volume nearest the first event began at 02:27 UTC.
2 thunderstorm wind. Local standard time, as filed.
Power lines were downed by strong winds near the 5500 block of Chestnut avenue.
No damage reported.
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: 719769, 719770.