Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 119, NWS Tulsa, OK

May 16, 1991Delaware County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 16, 1991, 11:09 PM CDT for Delaware County, Oklahoma. It was in force for 66 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 16, 1991, 11:09 PM CDT (04:09 UTC)
Expired: May 17, 1991, 12:15 AM CDT
In force: 66 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Delaware County, OK

What was reported inside it

Time	Report	Where	Remark
May 16, 11:24 PM CDT	Hail 0.88	Delaware, 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

Springfield, MO (KUMN), launched 00:00Z, 4.2 hours before the alert went out and 105 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: 2446 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 920 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 6.8

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 16, 5:15 PM CDT, 5 hours 54 minutes before

OKZ029-030-031-162315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
514 PM CDT THU MAY 16 1991

AT 510 PM RADAR INDICATED A DEVELOPING THUNDERSTORM IN WESTERN
OKMULGEE COUNTY. CONDITIONS ARE FAVORABLE FOR THIS THUNDERSTORM TO
INTENSIFY.

PERSONS IN NORTHERN OKMULGEE COUNTY SHOULD BE ALERT FOR RAPIDLY
CHANGING WEATHER CONDITIONS AND LISTEN FOR FURTHER INFORMATION FROM
THE NATIONAL WEATHER SERVICE.

Local storm report, May 16, 9:51 PM CDT, 1 hour 18 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 16, 10:46 PM CDT, 23 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 16, 11:00 PM CDT, 9 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 Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 16, 7:03 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Wagoner	57 min
May 16, 7:15 PM CDT	Tornado Warning	TSA	Creek	30 min
May 16, 7:18 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	42 min
May 16, 7:42 PM CDT	Tornado Warning	TSA	Tulsa	33 min
May 16, 7:58 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Wagoner	62 min
May 16, 8:10 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	50 min
May 16, 8:37 PM CDT	Tornado Warning	TSA	Rogers	53 min
May 16, 9:26 PM CDT	Tornado Warning	TSA	Mayes, Rogers	49 min
May 16, 10:16 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes	44 min
May 16, 11:09 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	51 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1991 Every severe thunderstorm warning in 1991

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.