Alert archive / Oklahoma / Flash Flood Warnings in 1999

Flash Flood Warning 7, NWS Norman, OK

April 3, 1999Bryan County, Oklahoma

NWS Norman, OK issued this flash flood warning at Apr 3, 1999, 9:30 AM CST for Bryan County, Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 3, 1999, 9:30 AM CST (15:30 UTC)
Expired: Apr 3, 1999, 12:00 PM CST
In force: 3 hr
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Bryan County, OK

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 3.5 hours before the alert went out and 158 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: 841 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 918 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

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 flash flood 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 flash flood warning went out at Apr 3, 2:50 AM CST, 6 hours 40 minutes earlier.

Area forecast discussion, Apr 3, 2:50 AM CST, 6 hours 40 minutes before

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In the hours before

Special weather statement, Apr 3, 6:30 AM CST, 3 hours before

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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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Special weather statement, Apr 3, 6:30 AM CST, 3 hours 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.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 2, 6:09 PM CST	Tornado Warning	OUN	Beckham, Roger Mills	36 min
Apr 2, 6:15 PM CST	Severe Thunderstorm Warning	OUN	Kay, Noble	45 min
Apr 2, 6:45 PM CST	Tornado Warning	OUN	Beckham, Roger Mills	15 min
Apr 2, 6:48 PM CST	Severe Thunderstorm Warning	OUN	Greer, Harmon	27 min
Apr 2, 6:51 PM CST	Severe Thunderstorm Warning	OUN	Beckham	24 min
Apr 2, 6:54 PM CST	Severe Thunderstorm Warning	OUN	Kay	51 min
Apr 2, 6:57 PM CST	Tornado Warning	OUN	Custer	33 min
Apr 2, 7:05 PM CST	Flash Flood Warning	OUN	Kay	3 hr
Apr 2, 7:13 PM CST	Tornado Warning	OUN	Greer, Harmon	47 min
Apr 2, 7:29 PM CST	Severe Thunderstorm Warning	OUN	Custer	46 min
Apr 2, 7:45 PM CST	Severe Thunderstorm Warning	OUN	Kay	45 min
Apr 2, 7:56 PM CST	Tornado Warning	OUN	Beckham, Greer	49 min
Apr 2, 8:04 PM CST	Severe Thunderstorm Warning	OUN	Dewey	41 min
Apr 2, 8:35 PM CST	Tornado Warning	OUN	Washita	40 min
Apr 2, 8:37 PM CST	Severe Thunderstorm Warning	OUN	Roger Mills	53 min
Apr 2, 8:47 PM CST	Severe Thunderstorm Warning	OUN	Dewey	43 min
Apr 2, 9:11 PM CST	Tornado Warning	OUN	Custer, Washita	49 min
Apr 2, 9:15 PM CST	Severe Thunderstorm Warning	OUN	Major	45 min
Apr 2, 9:27 PM CST	Severe Thunderstorm Warning	OUN	Roger Mills	48 min
Apr 2, 9:56 PM CST	Tornado Warning	OUN	Custer	49 min
Apr 2, 9:57 PM CST	Severe Thunderstorm Warning	OUN	Dewey	48 min
Apr 2, 10:03 PM CST	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	42 min
Apr 2, 10:42 PM CST	Severe Thunderstorm Warning	OUN	Dewey	33 min
Apr 2, 10:58 PM CST	Severe Thunderstorm Warning	OUN	Greer, Harmon	47 min
Apr 2, 11:02 PM CST	Severe Thunderstorm Warning	OUN	Blaine	43 min
Apr 2, 11:11 PM CST	Severe Thunderstorm Warning	OUN	Major	49 min
Apr 2, 11:36 PM CST	Severe Thunderstorm Warning	OUN	Woodward	24 min
Apr 2, 11:44 PM CST	Severe Thunderstorm Warning	OUN	Jackson	46 min
Apr 2, 11:57 PM CST	Severe Thunderstorm Warning	OUN	Tillman	48 min
Apr 2, 11:57 PM CST	Severe Thunderstorm Warning	OUN	Kiowa, Washita	48 min
Apr 3, 12:07 AM CST	Severe Thunderstorm Warning	OUN	Garfield	38 min
Apr 3, 12:44 AM CST	Severe Thunderstorm Warning	OUN	Major	31 min
Apr 3, 12:51 AM CST	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	39 min
Apr 3, 1:13 AM CST	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	47 min
Apr 3, 1:58 AM CST	Severe Thunderstorm Warning	OUN	Logan, Noble, Payne	32 min
Apr 3, 6:39 AM CST	Severe Thunderstorm Warning	OUN	Bryan	51 min
Apr 3, 7:24 AM CST	Flash Flood Warning	OUN	Atoka	3 hr
Apr 3, 7:46 AM CST	Flash Flood Warning	OUN	Bryan	119 min
Apr 3, 8:36 AM CST	Severe Thunderstorm Warning	OUN	Atoka, Bryan	39 min
Apr 2, 6:15 PM CST	Severe Thunderstorm Warning	OUN	Knox	30 min
Apr 2, 6:30 PM CST	Tornado Warning	OUN	Knox	30 min
Apr 2, 6:55 PM CST	Tornado Warning	OUN	Baylor, Knox	50 min
Apr 2, 7:02 PM CST	Severe Thunderstorm Warning	OUN	Foard, Hardeman	28 min
Apr 2, 7:45 PM CST	Severe Thunderstorm Warning	OUN	Baylor, Wilbarger	45 min
Apr 2, 11:44 PM CST	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Knox	46 min

Nearby

Flash Flood Warnings in Oklahoma, 1999 Every flash flood 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; the sounding from the Mesonet's radiosonde archive.