Dissipating supercell originating from a pyrocumulus wildfire across the Texas Panhandle produced heat burst severe wind gusts as it dissipated across western Oklahoma.
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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.
Dissipating supercell originating from a pyrocumulus wildfire across the Texas Panhandle produced heat burst severe wind gusts as it dissipated across western Oklahoma.
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 May 11, 5:43 PM CST, 2 hours 37 minutes earlier.
Area Forecast Discussion
National Weather Service Norman OK
643 PM CDT Fri May 11 2018
.DISCUSSION...
Please see the 00Z aviation discussion below.
&&
.AVIATION...
VFR will apply through the forecast period. Wind speeds will
decrease slightly after sunset. Mid to high clouds will increase
over central OK, thanks to smoke and a thunderstorm in the TX
panhandle. Some lower cigs around 035-050 are expected after 14Z.
&&
.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK 68 87 69 89 / 0 0 0 0
Hobart OK 68 93 70 92 / 10 0 0 20
Wichita Falls TX 68 91 70 91 / 0 0 0 0
Gage OK 69 96 68 94 / 10 10 10 30
Ponca City OK 70 90 69 92 / 10 0 0 10
Durant OK 69 85 68 88 / 0 0 0 0
&&
.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Wind Advisory until 7 PM CDT this evening for OKZ004>020-022>031-
035-038.
TX...None.
&&
99/99/03Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 750 PM CDT Fri May 11 2018 OKZ004>048-050>052-TXZ083>090-130100- 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- 750 PM CDT Fri May 11 2018 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Through Tonight... .Thunderstorms... There is a Marginal Risk for severe thunderstorms, mainly along and west of a Woodward to Hollis line. The most likely time for storms will be between 5 and 9 pm. If storms form, hail to the size of golf balls and damaging winds to 70 mph would be possible. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... .Thunderstorms... A few strong to severe thunderstorms with large hail and damaging winds are possible Saturday through Monday across parts of western Oklahoma. Thunderstorm chances are expected to increase across all of Oklahoma and north Texas Tuesday through Thursday. Some storms Tuesday through Thursday may be strong to severe with large hail and damaging winds. Locally heavy rainfall may cause flooding in a few areas Tuesday through Thursday due to slow moving storms. 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
724 PM CDT FRI MAY 11 2018
OKZ014-021-120045-
Roger Mills OK-Beckham OK-
724 PM CDT FRI MAY 11 2018
...SIGNIFICANT WEATHER ADVISORY FOR southwestern Roger Mills and
northwestern Beckham Counties Until 745 PM CDT...
AT 719 PM CDT, severe thunderstorms were located in Wheeler County
Texas along a line extending from near Allison to north of Shamrock,
moving northeast at 35 MPH.
These thunderstorms will move into western Roger Mills and
northwestern Beckham Counties before 800 pm. Severe weather will be
possible with these storms if they maintain their current intensity.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the situation closely. Be ready to act quickly if a warning
is issued or if storms threaten you.
&&
LAT...LON 3574 10000 3587 9973 3585 9967 3528 9988
3522 10000
TIME...MOT...LOC 0019Z 230DEG 32KT 3552 10012 3529 10024
..speg.SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 906 PM CDT FRI MAY 11 2018 OKZ014>016-021-022-120300- Washita OK-Roger Mills OK-Dewey OK-Beckham OK-Custer OK- 906 PM CDT FRI MAY 11 2018 ...SIGNIFICANT WEATHER ADVISORY FOR northern Washita...eastern Roger Mills...southern Dewey...northern Beckham and Custer Counties Until 1000 PM CDT... AT 903 PM CDT, dissipating thunderstorms over west central Oklahoma can produce localized strong winds to around 50 mph this evening. HAZARDS INCLUDE... Wind gusts to 50 MPH... LAT...LON 3595 9945 3604 9864 3539 9863 3529 9998 TIME...MOT...LOC 0203Z 228DEG 21KT 3561 9927 ..speg.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
916 PM CDT FRI MAY 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0905 PM TSTM WND GST 4 WNW CAMARGO 36.04N 99.35W
05/11/2018 M57 MPH DEWEY OK MESONET
HEAT BURST FROM DECAYING STORM.
&&
JPThe national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
Associated with a heat burst. Measured by Putnam Mesonet.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oklahoma in 2018Every state in 2018This day in weather historyWarnings in Oklahoma, May 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: 763243.