Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 894, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Nov 20, 2023, 3:30 PM CST for Atoka County, Oklahoma. It was in force for 30 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
- Nov 20, 2023, 3:30 PM CST (21:30 UTC)
- Expired
- Nov 20, 2023, 4:00 PM CST
- In force
- 30 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Atoka County, OK
The radar
The Norman radar (KTLX), 155 km from the middle of the area, began a volume at 21:32 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
Shreveport, LA (KSHV), launched 12:00Z, 9.5 hours before the alert went out and 299 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 770 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 366 m²/s²
- 0-3 km storm-relative helicity
- 313 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 Nov 20, 12:40 PM CST, 2 hours 50 minutes earlier.
Area forecast discussion, Nov 20, 12:40 PM CST, 2 hours 50 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>Hazardous weather outlook, Nov 20, 7:14 AM CST, 8 hours 16 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>In the hours before
Special weather statement, Nov 20, 2:35 PM CST, 55 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 |
|---|---|---|---|---|
| Nov 19, 10:25 PM CST | Special Weather Statement | OUN | Oklahoma | 35 min |
| Nov 19, 10:45 PM CST | Special Weather Statement | OUN | Pottawatomie | 30 min |
| Nov 19, 11:16 PM CST | Special Weather Statement | OUN | Seminole | 29 min |
| Nov 19, 11:55 PM CST | Special Weather Statement | OUN | McClain | 35 min |
| Nov 20, 12:08 AM CST | Severe Thunderstorm Warning | OUN | Cleveland, McClain, Pottawatomie | 25 min |
| Nov 20, 1:21 AM CST | Special Weather Statement | OUN | Hughes | 39 min |
| Nov 20, 1:52 AM CST | Special Weather Statement | OUN | Love | 38 min |
| Nov 20, 2:30 AM CST | Severe Thunderstorm Warning | OUN | Carter, Johnston, Marshall | 45 min |
| Nov 20, 3:12 AM CST | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Johnston | 48 min |
| Nov 20, 4:00 AM CST | Special Weather Statement | OUN | Atoka | 15 min |
| Nov 20, 5:44 AM CST | Special Weather Statement | OUN | Hughes | 16 min |
| Nov 20, 7:19 AM CST | Special Weather Statement | OUN | Hughes | 26 min |
| Nov 20, 2:35 PM CST | Special Weather Statement | OUN | Coal | 25 min |
| Nov 20, 2:48 PM CST | Severe Thunderstorm Warning | OUN | Atoka, Coal | 42 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2023Every severe thunderstorm warning in 2023
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.