Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 510, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 10, 2018, 6:40 PM CDT for 4 counties in Oklahoma. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 10, 2018, 6:40 PM CDT (23:40 UTC)
- Expired
- Aug 10, 2018, 7:30 PM CDT
- In force
- 50 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Caddo County, OK, Canadian County, OK, Grady County, OK, Oklahoma County, OK
The radar
The Norman radar (KTLX), 58 km from the middle of the area, began a volume at 23:43 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.7 hours before the alert went out and 48 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1864 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1104 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Aug 10, 5:45 PM CDT, 55 minutes earlier.
Area forecast discussion, Aug 10, 5:45 PM CDT, 55 minutes before
Area Forecast Discussion National Weather Service Norman OK 545 PM CDT Fri Aug 10 2018 .DISCUSSION... No changes to current forecast/grids, as isolated to scattered convection persists across the area with localized reports of damaging wind gusts. && .AVIATION... Thunderstorms are impacting the KWWR and KLAW terminals at this time. Thunderstorm prospects at/near KOKC will increase within the next hour with the passage of a northerly wind shift. Downbursts and localized strong/variable winds may accompany storms. Otherwise... convection will wane after sunset with lingering scattered to broken ceilings above aviation thresholds and persistently light/variable winds. && .PREV DISCUSSION... /issued 347 PM CDT Fri Aug 10 2018/ DISCUSSION... Scattered showers and storms are expected over the next few days as a cutoff upper low waddles over west Texas through the weekend before the models finally show enough it wandering far enough north to get nudged out by the weak northern stream by mid-week next week. The most widespread precipitation chances currently look to be Sunday through Tuesday. With precipitable water values approaching or exceeding two inches (especially in the southeast half of the area) and weak flow, there could be some localized heavy rain potential, especially Sunday/Monday. With the exit of this system dependent on the subtle movement of the cutoff low center and the weak flow in the pattern, do not have a lot of confidence in the later time periods, although the models currently are relatively consistent with this scenario. && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 71 91 69 83 / 20 30 30 60 Hobart OK 70 91 70 85 / 30 40 30 60 Wichita Falls TX 71 92 72 85 / 30 30 40 60 Gage OK 65 90 67 85 / 20 10 20 40 Ponca City OK 68 93 70 87 / 20 20 20 50 Durant OK 71 89 71 86 / 20 30 40 60 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && 25/20
Hazardous weather outlook, Aug 10, 4:06 PM CDT, 2 hours 34 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 406 PM CDT Fri Aug 10 2018 OKZ004>048-050>052-TXZ083>090-112115- 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- 406 PM CDT Fri Aug 10 2018 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Through Tonight... .Thunderstorms... Isolated to scattered thunderstorms will continue to develop and move across portions of the area through tonight. Brief strong wind gusts, heavy rain, and lightning are the main concerns with any storms that occur. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... .Thunderstorms... Thunderstorms will be possible through the middle of next week with the greatest coverage of storms occurring Sunday through Tuesday. Severe storms are unlikely. Some storms may produce heavy rainfall amounts. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook.
In the hours before
Special weather statement, Aug 10, 4:56 PM CDT, 1 hour 44 minutes before
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</html>Special weather statement, Aug 10, 6:36 PM CDT, 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
636 PM CDT FRI AUG 10 2018
OKZ024-025-027-029-110000-
Grady OK-Oklahoma OK-Canadian OK-Cleveland OK-
636 PM CDT FRI AUG 10 2018
...SIGNIFICANT WEATHER ADVISORY FOR northeastern Grady...southwestern
Oklahoma...southeastern Canadian and northwestern Cleveland Counties
Until 700 PM CDT....
AT 634 PM CDT, a strong thunderstorm was located over southwestern
Oklahoma City, moving south at 15 MPH.
HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...
LAT...LON 3546 9762 3537 9763 3532 9765 3532 9766
3534 9767 3531 9767 3529 9776 3535 9781
3548 9775
TIME...MOT...LOC 2334Z 17DEG 11KT 3542 9771
MADThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:30 PM CDT | Special Weather Statement | OUN | Garfield | 30 min |
| Aug 10, 1:30 PM CDT | Special Weather Statement | OUN | Garfield | 30 min |
| Aug 10, 1:53 PM CDT | Special Weather Statement | OUN | Caddo | 37 min |
| Aug 10, 1:56 PM CDT | Special Weather Statement | OUN | Custer | 34 min |
| Aug 10, 2:19 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Dewey | 26 min |
| Aug 10, 2:25 PM CDT | Special Weather Statement | OUN | Noble | 35 min |
| Aug 10, 2:31 PM CDT | Special Weather Statement | OUN | Greer | 29 min |
| Aug 10, 2:40 PM CDT | Severe Thunderstorm Warning | OUN | Custer | 50 min |
| Aug 10, 3:08 PM CDT | Special Weather Statement | OUN | Woods | 52 min |
| Aug 10, 3:21 PM CDT | Special Weather Statement | OUN | Payne | 24 min |
| Aug 10, 3:28 PM CDT | Severe Thunderstorm Warning | OUN | Payne | 32 min |
| Aug 10, 3:30 PM CDT | Special Weather Statement | OUN | Custer | 30 min |
| Aug 10, 3:35 PM CDT | Special Weather Statement | OUN | Beckham | 25 min |
| Aug 10, 3:47 PM CDT | Special Weather Statement | OUN | Kay | 28 min |
| Aug 10, 3:52 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer | 38 min |
| Aug 10, 3:56 PM CDT | Special Weather Statement | OUN | Beckham | 34 min |
| Aug 10, 3:58 PM CDT | Special Weather Statement | OUN | Alfalfa | 32 min |
| Aug 10, 4:00 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Washita | 30 min |
| Aug 10, 4:07 PM CDT | Special Weather Statement | OUN | Woods | 23 min |
| Aug 10, 4:16 PM CDT | Severe Thunderstorm Warning | OUN | Woods, Woodward | 44 min |
| Aug 10, 4:30 PM CDT | Special Weather Statement | OUN | Logan | 30 min |
| Aug 10, 4:54 PM CDT | Special Weather Statement | OUN | Logan | 36 min |
| Aug 10, 4:56 PM CDT | Special Weather Statement | OUN | Woodward | 34 min |
| Aug 10, 4:57 PM CDT | Severe Thunderstorm Warning | OUN | Woodward | 48 min |
| Aug 10, 5:24 PM CDT | Special Weather Statement | OUN | Greer | 36 min |
| Aug 10, 5:30 PM CDT | Special Weather Statement | OUN | Logan | 30 min |
| Aug 10, 5:36 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 39 min |
| Aug 10, 6:13 PM CDT | Special Weather Statement | OUN | Oklahoma | 32 min |
| Aug 10, 6:21 PM CDT | Special Weather Statement | OUN | Canadian | 24 min |
| Aug 10, 6:36 PM CDT | Special Weather Statement | OUN | Canadian | 24 min |
| Aug 10, 2:47 PM CDT | Special Weather Statement | OUN | Knox | 43 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2018Every severe thunderstorm warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.