Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 493, NWS Tulsa, OK

September 10, 1999Tulsa County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Sep 10, 1999, 1:54 PM CDT for Tulsa County, Oklahoma. It was in force for 36 min. 3 reports 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: Sep 10, 1999, 1:54 PM CDT (18:54 UTC)
Expired: Sep 10, 1999, 2:30 PM CDT
In force: 36 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Tulsa County, OK

What was reported inside it

Time	Report	Where	Remark
Sep 10, 1:55 PM CDT	Hail 0.88	Tulsa, OK	There were several reports of large hail from near downtown Tulsa to the midtown area...they are:Time (CDT) Location Size155 PM Harvard and BA Expwy .75"200 PM 31st St. S. and Yale .88"220 PM 11th St. S. and Yale .88"
Sep 10, 2:04 PM CDT	Thunderstorm Wind 61	Tulsa, OK	There were numerous reports of strong winds in southcentral and southeast Tulsa. The worst damage was centered near 91st Street South and Memorial. Following is a summary of individual reports...At 200 PM CDT, there was a gust to 70 mph at 71st Street South
Sep 10, 2:12 PM CDT	Hail 0.88	Tulsa, OK	There were several reports of large hail along the 81st Street corridor in southeast Tulsa and western Broken Arrow. At 212 PM CDT, there was a report of nickel-sized hail at 81st Street South and Memorial in Tulsa. At 220 PM CDT, there was a report of dime-

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.

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 6.9 hours before the alert went out and 149 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: 73 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2530 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 10, 10:25 AM CDT, 3 hours 29 minutes earlier.

Area forecast discussion, Sep 10, 10:25 AM CDT, 3 hours 29 minutes before

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In the hours before

Special weather statement, Sep 10, 1:00 PM CDT, 54 minutes before

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Special weather statement, Sep 10, 1:00 PM CDT, 54 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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 10, 2:13 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Wagoner	47 min
Sep 10, 2:57 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee, Wagoner	48 min
Sep 10, 3:21 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	54 min
Sep 10, 3:45 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee	45 min
Sep 10, 3:59 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Sequoyah	61 min
Sep 10, 4:09 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	36 min
Sep 10, 4:11 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	49 min
Sep 10, 4:19 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	41 min
Sep 10, 4:45 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore	60 min
Sep 10, 4:50 PM CDT	Severe Thunderstorm Warning	TSA	Creek	40 min
Sep 10, 4:55 PM CDT	Severe Thunderstorm Warning	TSA	Haskell	35 min
Sep 10, 5:29 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	46 min
Sep 10, 5:29 PM CDT	Severe Thunderstorm Warning	TSA	Creek	46 min
Sep 10, 6:04 PM CDT	Tornado Warning	TSA	Okfuskee	26 min
Sep 10, 6:10 PM CDT	Severe Thunderstorm Warning	TSA	Creek	50 min
Sep 10, 6:27 PM CDT	Tornado Warning	TSA	Okfuskee	33 min
Sep 10, 6:39 PM CDT	Tornado Warning	TSA	Okfuskee	36 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1999 Every severe thunderstorm warning in 1999

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.