Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 783, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 10, 2017, 11:53 PM CDT for 4 counties in Oklahoma. It was in force for 52 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, 2017, 11:53 PM CDT (04:53 UTC)
- Expired
- Aug 11, 2017, 12:45 AM CDT
- In force
- 52 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Beckham County, OK, Custer County, OK, Roger Mills County, OK, Washita County, OK
The radar
The Altus AFB radar (KFDR), 128 km from the middle of the area, began a volume at 04:53 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 00:00Z, 4.9 hours before the alert went out and 178 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
- 721 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 1487 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 66 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, 6:37 PM CDT, 5 hours 16 minutes earlier.
Area forecast discussion, Aug 10, 6:37 PM CDT, 5 hours 16 minutes before
Area Forecast Discussion...UPDATED National Weather Service Norman OK 637 PM CDT Thu Aug 10 2017 .AVIATION... 11/00Z TAFs. Primarily VFR conditions expected outside of TSRA. For the first 3 to 6 hours of the forecast, main impacts from TSRA will be brief from KPNC to KOKC/KOUN to KSPS. More in the way of widespread and longer lasting shower and storm activity still appears possible overnight so will keep TEMPO and prevailing MVFR conditions going into tomorrow morning. Outside of convective strong wind gusts, prevailing winds will be light through the period. && .PREV DISCUSSION... /issued 229 PM CDT Thu Aug 10 2017/ DISCUSSION... Will keep this short as strong storms are already ongoing. In the broad sense, it is likely that we will experience a couple of rounds of thunderstorms today and overnight. But the specifics are still a little in question. The current storms in northwest Oklahoma have lost a little punch as they moved in from the Oklahoma panhandle. But they are moving into an area of much higher surface based CAPE, so we expect some regeneration. Meanwhile, additional storms are in the process of developing in western Kansas, which may evolve into the main show tonight. And now the last few runs of the HRRR have also been signaling the possibility of storms in the southwest this evening as well. Will not get too tricky on timing but have kept broad high POPs across much of the area, and expanded them farther south with the HRRR trends. Meanwhile, it appears we will remain in a relatively active pattern with west-northwest flow aloft and waves moving into the upper Midwest and the northern and central Plains. Highest rain chances will be northeast, while still generally drier and warmer southwest. && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 72 85 71 85 / 80 60 60 60 Hobart OK 72 89 73 89 / 50 30 40 50 Wichita Falls TX 75 97 76 95 / 30 20 20 40 Gage OK 67 81 68 83 / 70 30 60 60 Ponca City OK 69 84 69 83 / 80 60 40 50 Durant OK 74 95 74 90 / 20 40 40 40 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && 25/09/11
Hazardous weather outlook, Aug 10, 10:30 PM CDT, 1 hour 23 minutes before
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Special weather statement, Aug 10, 10:14 PM CDT, 1 hour 39 minutes before
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</html>Special weather statement, Aug 10, 10:51 PM CDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 1051 PM CDT THU AUG 10 2017 OKZ004-009-110430- Harper OK-Ellis OK- 1051 PM CDT THU AUG 10 2017 ...SIGNIFICANT WEATHER ADVISORY FOR southwestern Harper and northwestern Ellis Counties Until 1130 PM CDT... AT 1050 PM CDT, a strong thunderstorm was located 5 miles south of Slapout, moving east at 15 MPH. HAZARDS INCLUDE... Hail up to the size of nickels... Wind gusts to 50 MPH... Minor flooding in areas of poor drainage... Locations impacted include... Catesby. LAT...LON 3666 10000 3669 9985 3643 9981 3643 10000 TIME...MOT...LOC 0350Z 263DEG 11KT 3654 10013 WR
Special weather statement, Aug 10, 11:31 PM CDT, 22 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 1131 PM CDT THU AUG 10 2017 OKZ014>016-021-022-110500- Roger Mills OK-Washita OK-Dewey OK-Beckham OK-Custer OK- 1131 PM CDT THU AUG 10 2017 ...SIGNIFICANT WEATHER ADVISORY FOR southeastern Roger Mills... northwestern Washita...south central Dewey...northeastern Beckham and northwestern Custer Counties Until midnight CDT... AT 1128 PM CDT, a strong thunderstorm was located 7 miles north of Sayre, moving east at 30 MPH. HAZARDS INCLUDE... Hail up to the size of nickels... Wind gusts to 40 MPH... Minor flooding in areas of poor drainage... LAT...LON 3529 9963 3546 9974 3589 9894 3565 9877 TIME...MOT...LOC 0428Z 260DEG 27KT 3541 9962 SIX
Special weather statement, Aug 10, 11:39 PM CDT, 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1139 PM CDT THU AUG 10 2017
OKZ009-110515-
Ellis OK-
1139 PM CDT THU AUG 10 2017
...SIGNIFICANT WEATHER ADVISORY FOR northwestern Ellis County Until
1215 AM CDT...
AT 1136 PM CDT, a strong thunderstorm was located 7 miles northwest
of Shattuck, moving east at 30 MPH.
HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...
LAT...LON 3648 10000 3659 9972 3659 9966 3628 9961
3626 10000
TIME...MOT...LOC 0436Z 260DEG 26KT 3636 9996
SIXThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 7:03 PM CDT | Special Weather Statement | OUN | Kay | 27 min |
| Aug 10, 7:10 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 50 min |
| Aug 10, 7:23 PM CDT | Severe Thunderstorm Warning | OUN | McClain | 32 min |
| Aug 10, 7:31 PM CDT | Special Weather Statement | OUN | Kay | 29 min |
| Aug 10, 9:13 PM CDT | Special Weather Statement | OUN | Greer | 32 min |
| Aug 10, 9:19 PM CDT | Special Weather Statement | OUN | Roger Mills | 26 min |
| Aug 10, 10:00 PM CDT | Special Weather Statement | OUN | Beckham | 45 min |
| Aug 10, 10:14 PM CDT | Special Weather Statement | OUN | Beckham | 46 min |
| Aug 10, 10:44 PM CDT | Special Weather Statement | OUN | Custer | 46 min |
| Aug 10, 10:45 PM CDT | Special Weather Statement | OUN | Beckham | 45 min |
| Aug 10, 10:51 PM CDT | Special Weather Statement | OUN | Harper | 39 min |
| Aug 10, 11:31 PM CDT | Special Weather Statement | OUN | Custer | 29 min |
| Aug 10, 11:39 PM CDT | Special Weather Statement | OUN | Ellis | 36 min |
| Aug 10, 11:52 PM CDT | Areal Flood Advisory | OUN | Ellis, Harper, Woodward | 3 hr |
| Aug 10, 11:53 PM CDT | Areal Flood Advisory | OUN | Ellis, Harper, Woodward | 3 hr |
| Aug 11, 12:08 AM CDT | Areal Flood Advisory | OUN | Beckham, Roger Mills | 3 hr |
| Aug 11, 12:25 AM CDT | Special Weather Statement | OUN | Roger Mills | 35 min |
| Aug 11, 12:30 AM CDT | Special Weather Statement | OUN | Woodward | 30 min |
| Aug 11, 12:57 AM CDT | Areal Flood Advisory | OUN | Woods | 3 hr |
| Aug 11, 1:03 AM CDT | Special Weather Statement | OUN | Alfalfa | 27 min |
| Aug 11, 1:13 AM CDT | Flash Flood Warning | OUN | Beckham, Custer, Roger Mills, Washita | 3 hr |
| Aug 11, 1:18 AM CDT | Special Weather Statement | OUN | Beckham | 27 min |
| Aug 11, 1:22 AM CDT | Flood Watch | OUN | Alfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 42 more | 54 hr |
| Aug 11, 1:26 AM CDT | Areal Flood Advisory | OUN | Blaine | 3 hr |
| Aug 11, 1:31 AM CDT | Special Weather Statement | OUN | Alfalfa | 29 min |
| Aug 11, 1:43 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Grant | 47 min |
| Aug 11, 1:48 AM CDT | Flash Flood Warning | OUN | Alfalfa, Grant, Woods, Woodward | 3 hr |
| Aug 11, 2:29 AM CDT | Areal Flood Advisory | OUN | Blaine, Caddo, Canadian, Custer, Washita | 3 hr |
| Aug 11, 2:44 AM CDT | Flash Flood Warning | OUN | Caddo, Canadian, Grady | 4 hr |
| Aug 11, 2:46 AM CDT | Flash Flood Warning | OUN | Grant, Kay | 3 hr |
| Aug 11, 3:25 AM CDT | Special Weather Statement | OUN | Grady | 35 min |
| Aug 11, 3:49 AM CDT | Special Weather Statement | OUN | Garvin | 26 min |
| Aug 11, 4:06 AM CDT | Areal Flood Advisory | OUN | Canadian, Cleveland, Grady, McClain | 3 hr |
| Aug 11, 4:32 AM CDT | Special Weather Statement | OUN | Carter, Murray, Pontotoc, Seminole | 28 min |
| Aug 11, 6:00 AM CDT | Areal Flood Advisory | OUN | Comanche, Cotton, Garvin, Grady, Stephens | 3 hr |
| Aug 10, 7:49 PM CDT | Special Weather Statement | OUN | Wichita | 26 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2017Every severe thunderstorm warning in 2017
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.