Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 920, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Oct 20, 2019, 8:28 PM CDT for Cleveland County, McClain County, Pottawatomie County, Oklahoma. It was in force for 31 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 20, 2019, 8:28 PM CDT (01:28 UTC)
- Expired
- Oct 20, 2019, 8:59 PM CDT
- In force
- 31 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cleveland County, OK, McClain County, OK, Pottawatomie County, OK
The radar
The Norman radar (KTLX), 22 km from the middle of the area, began a volume at 01:30 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 20, 8:27 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 1.5 hours before the alert went out and 17 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
- 760 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 1785 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 302 m²/s²
- 0-3 km storm-relative helicity
- 425 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.8
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 20, 6:09 PM CDT, 2 hours 19 minutes earlier.
Area forecast discussion, Oct 20, 6:09 PM CDT, 2 hours 19 minutes before
Area Forecast Discussion National Weather Service Norman OK 609 PM CDT Sun Oct 20 2019 .AVIATION... A wind shift from the NNW will accompany a cold front over the next several hours for all terminals. In addition, thunderstorms are expected to develop along this cold front mainly near OKC/OUN and PNC. Some hail will be possible and will monitor closely for amendments. Most of the showers and storms should move out of the terminals after 04Z. Some LLWS will also be possible behind the front around 08-12Z early Mon morning. && .PRELIMINARY POINT TEMPS/POPS... Oklahoma City OK 48 69 41 71 / 40 0 0 0 Hobart OK 46 72 39 73 / 10 0 0 0 Wichita Falls TX 50 74 43 75 / 40 0 0 0 Gage OK 41 68 35 71 / 10 0 0 0 Ponca City OK 47 67 38 67 / 20 0 0 0 Durant OK 53 74 44 74 / 90 0 0 0 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...None. TX...None. && 99/99/03
Hazardous weather outlook, Oct 20, 12:01 PM CDT, 8 hours 27 minutes before
Hazardous Weather Outlook National Weather Service Norman OK 1201 PM CDT Sun Oct 20 2019 OKZ004>048-050>052-TXZ083>090-211715- 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- 1201 PM CDT Sun Oct 20 2019 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 an enhanced risk of severe thunderstorms this evening and tonight across east-central and southeast Oklahoma, including the area southeast of a line from Seminole to Ada and Sulphur to Ardmore. There is a slight risk extending northwest to a line from Chandler and Pauls Valley to Waurika with a marginal risk northwest to a Ripley and Choctaw to Norman and Wichita Falls line. Strong to severe thunderstorms are expected ahead of a cold front this evening and tonight, mainly after 7 pm, across portions of east-central and southeast Oklahoma. Significant hail (greater than 2 inches in diameter), damaging wind gusts, and isolated tornadoes are possible with these storms. The greatest tornado potential will be in the enhanced risk area. .SPOTTER AND EMERGENCY MANAGEMENT STATEMENT... Storm spotter groups and emergency management personnel should prepare for severe weather operations after 7 PM. .Fire Weather... Low relative humidity (15-30 percent) and breezy southerly winds (15-25 miles per hour) will create an elevated fire weather environment day across western Oklahoma and western north Texas today. .DAYS TWO THROUGH SEVEN...Monday through Saturday... .Thunderstorms... There is a chance for isolated thunderstorms on Thursday. Storms are not expected to be severe. .Fire Weather... Elevated fire weather conditions are expected across western Oklahoma and western sections of north Texas on Monday afternoon. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook. Thompson
In the hours before
Special weather statement, Oct 20, 7:52 PM CDT, 36 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Oct 20, 8:00 PM CDT, 28 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Oct 20, 8:11 PM CDT, 17 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Oct 20, 8:13 PM CDT, 15 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Oct 20, 8:17 PM CDT, 11 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Oct 20, 8:21 PM CDT, 7 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 20, 7:10 PM CDT | Special Weather Statement | OUN | Oklahoma | 35 min |
| Oct 20, 7:12 PM CDT | Special Weather Statement | OUN | Stephens | 33 min |
| Oct 20, 7:13 PM CDT | Special Weather Statement | OUN | Jefferson | 32 min |
| Oct 20, 7:37 PM CDT | Special Weather Statement | OUN | Logan | 23 min |
| Oct 20, 7:38 PM CDT | Special Weather Statement | OUN | Garvin | 37 min |
| Oct 20, 7:41 PM CDT | Special Weather Statement | OUN | Canadian | 34 min |
| Oct 20, 7:46 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Logan, Payne | 44 min |
| Oct 20, 7:47 PM CDT | Special Weather Statement | OUN | Grady | 28 min |
| Oct 20, 7:52 PM CDT | Special Weather Statement | OUN | Grant | 38 min |
| Oct 20, 8:00 PM CDT | Special Weather Statement | OUN | Payne | 30 min |
| Oct 20, 8:03 PM CDT | Severe Thunderstorm Warning | OUN | Grant, Kay | 42 min |
| Oct 20, 8:09 PM CDT | Severe Thunderstorm Warning | OUN | Payne | 22 min |
| Oct 20, 8:11 PM CDT | Special Weather Statement | OUN | Garvin | 34 min |
| Oct 20, 8:13 PM CDT | Special Weather Statement | OUN | Cleveland, McClain | 32 min |
| Oct 20, 8:17 PM CDT | Special Weather Statement | OUN | McClain | 28 min |
| Oct 20, 8:18 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, McClain, Murray, Pontotoc, Pottawatomie, Seminole | 42 min |
| Oct 20, 8:21 PM CDT | Special Weather Statement | OUN | Stephens | 24 min |
| Oct 20, 8:23 PM CDT | Severe Thunderstorm Warning | OUN | Bryan, Johnston, Marshall | 52 min |
| Oct 20, 8:26 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Garvin, Grady, Stephens | 34 min |
| Oct 20, 8:38 PM CDT | Special Weather Statement | OUN | Cleveland, Lincoln | 52 min |
| Oct 20, 8:43 PM CDT | Special Weather Statement | OUN | Logan, Noble, Payne | 47 min |
| Oct 20, 8:44 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 20 min |
| Oct 20, 8:51 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Garvin, Grady, McClain, Stephens | 39 min |
| Oct 20, 8:54 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal, Hughes, Johnston | 51 min |
| Oct 20, 8:55 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Pottawatomie, Seminole | 50 min |
| Oct 20, 8:58 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Pottawatomie, Seminole | 32 min |
| Oct 20, 9:10 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Logan, Oklahoma, Payne | 50 min |
| Oct 20, 9:13 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, Oklahoma, Pottawatomie, Seminole | 47 min |
| Oct 20, 9:23 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Garvin, McClain, Murray, Pottawatomie, Stephens | 52 min |
| Oct 20, 9:28 PM CDT | Special Weather Statement | OUN | Noble | 32 min |
| Oct 20, 9:36 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, McClain, Oklahoma, Pottawatomie | 39 min |
| Oct 20, 9:36 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, McClain, Oklahoma, Pottawatomie | 39 min |
| Oct 20, 9:47 PM CDT | Tornado Warning | OUN | Cleveland, McClain, Pottawatomie | 28 min |
| Oct 20, 9:57 PM CDT | Special Weather Statement | OUN | Atoka | 33 min |
| Oct 20, 9:59 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Hughes, McClain, Murray, Pontotoc, Pottawatomie and 1 more | 46 min |
| Oct 20, 10:01 PM CDT | Tornado Warning | OUN | McClain, Pontotoc, Pottawatomie, Seminole | 29 min |
| Oct 20, 10:17 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, Oklahoma, Pottawatomie, Seminole | 28 min |
| Oct 20, 10:19 PM CDT | Special Weather Statement | OUN | McClain | 26 min |
| Oct 20, 10:19 PM CDT | Tornado Warning | OUN | Hughes, Seminole | 26 min |
| Oct 20, 10:33 PM CDT | Special Weather Statement | OUN | Carter, Murray | 42 min |
| Oct 20, 10:36 PM CDT | Special Weather Statement | OUN | Garvin | 24 min |
| Oct 20, 10:36 PM CDT | Severe Thunderstorm Warning | OUN | Hughes, Pontotoc, Seminole | 39 min |
| Oct 20, 10:44 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Hughes, Johnston, McClain, Murray and 3 more | 46 min |
| Oct 20, 10:46 PM CDT | Special Weather Statement | OUN | Love | 29 min |
| Oct 20, 10:48 PM CDT | Special Weather Statement | OUN | Okfuskee | 27 min |
| Oct 20, 10:53 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Johnston, Love, Marshall | 52 min |
| Oct 20, 11:10 PM CDT | Severe Thunderstorm Warning | OUN | Hughes | 50 min |
| Oct 20, 11:13 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Johnston, Love, Marshall | 47 min |
| Oct 20, 11:16 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Hughes, Pontotoc, Seminole | 44 min |
| Oct 20, 11:24 PM CDT | Tornado Warning | OUN | Bryan, Johnston, Marshall | 14 min |
| Oct 20, 11:44 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Bryan | 46 min |
| Oct 21, 12:24 AM CDT | Severe Thunderstorm Warning | OUN | Bryan | 21 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2019Every severe thunderstorm warning in 2019
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.