Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 101, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 28, 1993, 11:45 PM CDT for Jefferson County, Oklahoma; Clay County, Texas. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Apr 28, 1993, 11:45 PM CDT (04:45 UTC)
- Expired
- Apr 29, 1993, 12:30 AM CDT
- In force
- 45 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Jefferson County, OK, Clay County, TX
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 4.8 hours before the alert went out and 152 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
- 338 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 587 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 0.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Apr 28, 3:42 PM CDT, 8 hours 3 minutes earlier.
Area forecast discussion, Apr 28, 3:42 PM CDT, 8 hours 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 345 PM CDT WED APR 28 1993 OUTFLO FM PREV CONVECTION HAS MADE FNT/INVERTED TROF DIFFICULT TO FIND THIS AFTN...IN ANY CASE EXPECT THIS FEATURE...WHICH IS NOW SOMEWHERE ACRS NRN OK TO WORK SWD AND BE IN THE XTRM SERN PTN OF THE FA BY THU AFTN. MOISTURE STILL STREAMING NWD ATTM AND FNT WL NOT MOV AS FAST AS MOST OF THE PROGS SHOW...THUS HIGH POPS FOR TONIGHT AND SPCLY FOR THE S ON THU. FOR FRI WL CONFINE MENTION OF PCPN TO XTRM SERN ZONES. FPC AND FWC TEMPS IN GOOD AGREEMENT AND WL BE FOLLOWED CLOSELY...THO GUID MINS FOR TNGT LIKELY TOO LOW. PAYNE COUNTY HAS RCVD SOME SUBSTANTIAL RAINFALL TDA...BUT FOR THE SHORT RANGE PCPN HAS NOT MOVD EWD FM THE STILLWATER AREA...RAINFALL TOTALS MUST BE WATCHED CLOSELY IN PAYNE COUNTY SHOULD ADDNL PCPN MOVE IN THIS EVE. OKC 56/68/52/72 7631 GAG 55/65/49/72 4321 PNC 54/65/51/70 7421 SPS 60/72/55/75 5742 .OK...NONE. .TX...NONE.
In the hours before
Local storm report, Apr 28, 6:47 PM CDT, 4 hours 58 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 |
|---|---|---|---|---|
| Apr 28, 7:18 PM CDT | Severe Thunderstorm Warning | OUN | Custer | 42 min |
| Apr 28, 7:28 PM CDT | Tornado Warning | OUN | Tillman | 32 min |
| Apr 28, 7:36 PM CDT | Severe Thunderstorm Warning | OUN | Washita | 39 min |
| Apr 28, 7:52 PM CDT | Flash Flood Warning | OUN | Payne | 5 hr |
| Apr 28, 8:07 PM CDT | Severe Thunderstorm Warning | OUN | Ellis | 68 min |
| Apr 28, 8:12 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 63 min |
| Apr 28, 8:38 PM CDT | Severe Thunderstorm Warning | OUN | Roger Mills | 52 min |
| Apr 28, 9:32 PM CDT | Severe Thunderstorm Warning | OUN | Harmon | 43 min |
| Apr 28, 9:35 PM CDT | Severe Thunderstorm Warning | OUN | Roger Mills | 40 min |
| Apr 28, 9:37 PM CDT | Severe Thunderstorm Warning | OUN | Greer | 68 min |
| Apr 28, 9:56 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Kiowa | 64 min |
| Apr 28, 9:58 PM CDT | Severe Thunderstorm Warning | OUN | Jackson | 62 min |
| Apr 28, 10:15 PM CDT | Severe Thunderstorm Warning | OUN | Beckham | 45 min |
| Apr 28, 10:27 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 63 min |
| Apr 28, 10:35 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 70 min |
| Apr 28, 11:03 PM CDT | Severe Thunderstorm Warning | OUN | Cotton | 42 min |
| Apr 29, 12:25 AM CDT | Flash Flood Warning | OUN | Payne | 6 hr |
| Apr 28, 8:49 PM CDT | Severe Thunderstorm Warning | OUN | Wichita | 41 min |
| Apr 28, 9:12 PM CDT | Severe Thunderstorm Warning | OUN | Knox | 63 min |
| Apr 28, 9:16 PM CDT | Severe Thunderstorm Warning | OUN | Foard | 59 min |
| Apr 28, 9:44 PM CDT | Severe Thunderstorm Warning | OUN | Hardeman | 31 min |
| Apr 28, 10:13 PM CDT | Severe Thunderstorm Warning | OUN | Wilbarger | 47 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1993Severe Thunderstorm Warnings in Texas, 1993Every severe thunderstorm warning in 1993
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.