Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 874, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Oct 14, 2017, 10:47 PM CDT for Canadian County, Grady County, Oklahoma. It was in force for 43 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
- Oct 14, 2017, 10:47 PM CDT (03:47 UTC)
- Expired
- Oct 14, 2017, 11:30 PM CDT
- In force
- 43 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Canadian County, OK, Grady County, OK
The radar
The Norman radar (KTLX), 60 km from the middle of the area, began a volume at 03:50 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, 3.8 hours before the alert went out and 49 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
- 946 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 1648 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 210 m²/s²
- 0-3 km storm-relative helicity
- 307 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 12.1
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 Oct 14, 6:21 PM CDT, 4 hours 26 minutes earlier.
Area forecast discussion, Oct 14, 6:21 PM CDT, 4 hours 26 minutes before
Area Forecast Discussion
National Weather Service Norman OK
621 PM CDT Sat Oct 14 2017
.DISCUSSION...
Please see the 00Z aviation discussion below.
&&
.AVIATION...
Some minor adjustments were made for the timing of TSRA tonight.
It appears 1-2 hours later than previously thought. Still expect
gusty north winds behind the front in addition to thunderstorms.
Some locations could exceed 40 kt gusts. The showers and storms
will quickly move SE overnight and skies will begin to clear near
sunrise. However, gusty north winds around 20 to 30 kt will
persist for a few hours during Sun morning.
&&
.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK 50 63 42 69 / 90 0 0 0
Hobart OK 49 64 40 69 / 80 0 0 0
Wichita Falls TX 54 66 43 69 / 80 10 0 0
Gage OK 42 63 36 71 / 20 0 0 0
Ponca City OK 47 63 38 69 / 90 0 0 0
Durant OK 56 68 47 72 / 90 20 0 0
&&
.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Wind Advisory until 7 AM CDT Sunday for OKZ004>007-009>012-
014>019-021>025-027>029-033>041-044>046-050.
TX...Wind Advisory until 7 AM CDT Sunday for TXZ083>090.
&&
99/03/03Hazardous weather outlook, Oct 14, 8:39 PM CDT, 2 hours 8 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 839 PM CDT Sat Oct 14 2017 OKZ004>048-050>052-TXZ083>090-151230- 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- 839 PM CDT Sat Oct 14 2017 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 slight risk of severe storms in far north central Oklahoma. A marginal risk includes much of the rest of the area. Location... The slight risk just covers an area along and north of a line from Tonkawa to medford to Renfrow, Oklahoma. The marginal risk is east of a line from Cherokee to Camargo to Sweetwater up to a line running from Chockie to Wapanucka to Burneyville. Timing... Through 2 AM. Impacts... Damaging wind gusts up to 70 mph and damaging hail, to the size of half dollars, are the main concerns. Locally heavy rain is also possible. Discussion... The cold front is currently pushing east southeast into northern Oklahoma, with elevated scattered thunderstorms continuing to develop behind it. Some of these storms will become strong to severe. Damaging wind gusts and damaging hail are the primary concerns overnight. The chance for severe storms will decrease overnight into the early Sunday morning hours. .SPOTTER AND EMERGENCY MANAGEMENT STATEMENT... Storm spotter groups and emergency management personnel across the risk areas should be prepared for severe weather operations into the overnight hours. .Strong Winds... Strong northerly winds are expected behind the cold front as it moves across the area. Wind gusts up to 45 mph will be possible in some areas this evening and overnight. A wind advisory is in effect through early Sunday for areas along and west of I-35. .DAYS TWO THROUGH SEVEN...Sunday through Friday... .Thunderstorms... There is a slight chance that showers and thunderstorms will linger across southeast Oklahoma early Sunday morning before moving out of the area. After these storms exit, no thunderstorms are expected through Friday. .Frost... Patchy frost will be possible across parts of northern Oklahoma on Monday morning. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook. Kurtz
In the hours before
Special weather statement, Oct 14, 8:37 PM CDT, 2 hours 10 minutes before
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</html>Special weather statement, Oct 14, 9:04 PM CDT, 1 hour 43 minutes before
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</html>Local storm report, Oct 14, 9:28 PM CDT, 1 hour 19 minutes before
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</html>Local storm report, Oct 14, 10:00 PM CDT, 47 minutes before
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</html>Special weather statement, Oct 14, 10:31 PM CDT, 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
1031 PM CDT SAT OCT 14 2017
OKZ016>019-022>025-027-150415-
Grady OK-Kingfisher OK-Oklahoma OK-Logan OK-Washita OK-Canadian OK-
Caddo OK-Custer OK-Blaine OK-
1031 PM CDT SAT OCT 14 2017
...SIGNIFICANT WEATHER ADVISORY FOR northwestern Grady...
Kingfisher...northwestern Oklahoma...western Logan...eastern
Washita...Canadian...northern Caddo...southeastern Custer and
southern Blaine Counties Until 1115 PM CDT...
AT 1026 PM CDT, strong thunderstorms were along a line extending from
5 miles west of Hennessey to 8 miles west of Okarche to near Hinton
to 5 miles north of Mountain View, moving east at 50 MPH.
HAZARDS INCLUDE...
Hail up to the size of dimes...
Wind gusts over 50 MPH...
Minor flooding in areas of poor drainage...
Frequent cloud to ground lightning...
Locations impacted include...
El Reno, Weatherford, Guthrie, Kingfisher, Yukon, Piedmont, Hinton,
Hennessey, Union City, Minco, Crescent, Geary, Okarche, Hydro,
Cashion, Binger, Calumet, Dover, Eakly and Gracemont.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 3616 9742 3584 9747 3555 9774 3511 9809
3512 9881 3555 9866 3583 9821 3616 9821
TIME...MOT...LOC 0326Z 258DEG 43KT 3609 9799 3574 9813 3545 9840 3518
9873
03The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 14, 8:26 PM CDT | Special Weather Statement | OUN | Kay | 49 min |
| Oct 14, 8:37 PM CDT | Special Weather Statement | OUN | Beckham | 38 min |
| Oct 14, 9:04 PM CDT | Special Weather Statement | OUN | Dewey | 41 min |
| Oct 14, 9:14 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Washita | 46 min |
| Oct 14, 9:52 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Caddo, Custer, Washita | 38 min |
| Oct 14, 10:31 PM CDT | Special Weather Statement | OUN | Caddo, Canadian, Kingfisher | 44 min |
| Oct 14, 11:04 PM CDT | Special Weather Statement | OUN | Logan, Oklahoma | 26 min |
| Oct 14, 11:05 PM CDT | Special Weather Statement | OUN | Kiowa | 40 min |
| Oct 14, 11:07 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Oklahoma | 38 min |
| Oct 14, 11:18 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Grady, McClain | 27 min |
| Oct 14, 11:22 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Logan, Oklahoma, Payne | 38 min |
| Oct 14, 11:43 PM CDT | Special Weather Statement | OUN | Comanche, Tillman | 32 min |
| Oct 14, 11:44 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, McClain, Oklahoma, Pottawatomie | 46 min |
| Oct 14, 11:58 PM CDT | Special Weather Statement | OUN | Payne | 32 min |
| Oct 15, 12:16 AM CDT | Severe Thunderstorm Warning | OUN | Hughes, Pottawatomie, Seminole | 44 min |
| Oct 15, 12:32 AM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Cotton, Jackson, Kiowa, Tillman | 43 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.