Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 244, NWS Norman, OK

May 19, 1990Lincoln County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 19, 1990, 6:25 PM CDT for Lincoln County, Oklahoma. It was in force for 50 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 19, 1990, 6:25 PM CDT (23:25 UTC)
Expired: May 19, 1990, 7:15 PM CDT
In force: 50 min
Issued by: NWS Norman, OK
Area: Whole counties

County Lincoln County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
May 19, 6:44 PM CDT	Hail 1.75	Lincoln, OK

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.4 hours before the alert went out and 71 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2806 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 613 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 366 m²/s²
0-3 km storm-relative helicity: 529 m²/s²
Significant tornado parameter: 4.9
Supercell composite: 23.4

Open this sounding in Storm Lab

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.

In the hours before

Special weather statement, May 19, 1:06 PM CDT, 5 hours 19 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, May 19, 1:12 PM CDT, 5 hours 13 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>

Local storm report, May 19, 5:13 PM CDT, 1 hour 12 minutes before

LOCAL STORM REPORT...DELAYED
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
510 PM CDT SAT MAY 19 1990

TIME(CDT)     COUNTY          EVENT
840 PM (18TH) HARPER          DIME SIZED HAIL 13 MILES SOUTH OF REYDON
900 PM (18TH) ROGER MILLS     QUARTER TO GOLFBALL SIZED HAIL 6 MILES
                              SOUTH OF REYDON
1245AM (19TH) PONTOTOC        DIME SIZED HAIL 3 MILES EAST OF ROFF

Special weather statement, May 19, 5:32 PM CDT, 53 minutes before

TXZ020-192300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WICHITA FALLS TX
530 PM CDT SAT MAY 19 1990

...UNSTABLE WEATHER CONDITIONS PREVAIL IN THE RED RIVER VALLEY...

LATE AFTERNOON TEMPERATURES WERE SOARING INTO THE MID TO UPPER 90S
ACROSS THE REGION.

A SURFACE LOW PRESSURE AREA WAS LOCARED BETWEEN WICHITA FALLS AND
CHILDRESS. ALSO...A DRY LINE/DEW POINT LINE WAS LOCATED BETWEEN
WICHITA FALLS AND CHILDRESS.

POTENTUALLY SEVERE THUNDERSTORMS WERE FORMING EAST OF DALLAS WHILE
SEVERE THUNDERSTORMS HAVE BEEN IN PROGRESS FOR SEVERAL HOURS IN
NORTHEAST OKLAHOMA.

A TORNADO WATCH AREA IS IN EFFECT FOR MUCH OF SOUTH CENTRAL...
CENTRAL AND EASTERN OKLAHOMMA UNTIL 11PM CDT TONIGHT.v

AREA RESIDENTS SHOULD BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS
IN THIS SECTION OF NORTH CENTRAL TEXAS THIS EVENING.

Local storm report, May 19, 5:37 PM CDT, 48 minutes before

LOCAL STORM REPORT...DELAYED    CORRECTION TO 1ST LISTING
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
510 PM CDT SAT MAY 19 1990

TIME(CDT)     COUNTY          EVENT
840 PM (18TH) ROGER MILLS     DIME SIZED HAIL 13 MILES SOUTH OF REYDON
900 PM (18TH) ROGER MILLS     QUARTER TO GOLFBALL SIZED HAIL 6 MILES
                              SOUTH OF REYDON
1245AM (19TH) PONTOTOC        DIME SIZED HAIL 3 MILES EAST OF ROFF

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 8:05 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	40 min
May 18, 8:35 PM CDT	Severe Thunderstorm Warning	OUN	Harper	55 min
May 18, 8:44 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	46 min
May 18, 8:58 PM CDT	Tornado Warning	OUN	Harper	32 min
May 19, 12:38 AM CDT	Severe Thunderstorm Warning	OUN	Pontotoc	52 min
May 19, 6:47 PM CDT	Severe Thunderstorm Warning	OUN	Payne	28 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1990 Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.