Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 376, NWS Norman, OK

June 18, 1998Carter County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 18, 1998, 9:15 PM CDT for Carter County, Oklahoma. It was in force for 45 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: Jun 18, 1998, 9:15 PM CDT (02:15 UTC)
Expired: Jun 18, 1998, 10:00 PM CDT
In force: 45 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Carter County, OK

The radar

The Norman radar (KTLX), 120 km from the middle of the area, began a volume at 02:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jun 18, 9:20 PM CDT	Hail 0.88	Wilson, 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.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.3 hours before the alert went out and 108 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3904 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 224 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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 3:55 PM CDT, 5 hours 20 minutes earlier.

Area forecast discussion, Jun 18, 3:55 PM CDT, 5 hours 20 minutes before

FPUS3 KOKC 182100
AFDOKC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
355 PM CDT THU JUN 18 1998

FRONTAL BOUNDARY SHOWS UP WELL ON VISIBLE IMAGERY...EXTENDING FROM
NEAR KSWO TO KTIK TO KFDR. IT APPEARS THAT SURFACE BASED CONVECTION
MAY BE UNDERWAY IN LINCOLN/ERN PAYNE COUNTY AS RAPIDLY DEVELOPING
STORMS ARE SHOWING UP ON KTLX. WILL BE A CLOSE CALL AS TO WHETHER OR
NOT THEY GO SEVERE IN OUR AREA OR WAIT UNTIL THEY GET INTO THE TULSA
CWA.

THICKER AREA OF CU AND WEAK ECHOES ARE ALSO SHOWING UP OVER THE
WICHITA FALLS AREA. INSTABILITY WILL LIKELY HAVE TO BATTLE CAP A BIT
LONGER BEFORE STORMS START FIRING IN THIS AREA...HOWEVER...THINK THE
STORMS WILL DEVELOP WITHIN THE NEXT FEW HOURS. EXPECT PRECIP TO
BECOME MORE WIDESPREAD ACROSS THE E CNTRL ZONES TONIGHT AS CAP
CONTINUES TO WEAKEN.

FOR THE ZONES WILL KEEP POPS NEAR AND EAST OF CURRENT FRONTAL
POSITION. ALTHOUGH MODELS DISAGREE ON LOCATION WHERE FRONT WILL
STALL AND WASH OUT...THEY ALL AGREE THAT IT WILL STALL AND WASH OUT
THROUGH TOMORROW AFTERNOON. WINDS WILL BE KIND OF SQUIRRELLY
TONIGHT...BUT EXPECT THEM TO GO LIGHT AND VARIABLE OVER MOST OF THE
AREA AFTER MIDNIGHT. LEE TROF DEVELOPS DURING THE AFTERNOON
FRIDAY...GRADUALLY BRINGING SLY FLOW AREAWIDE. WILL CARRY LOW POPS
TOMORROW OVER THE SOUTHEAST FOR LINGERING ACTIVITY FROM
TONIGHT...AND WILL ALSO CARRY LOW POPS IN THE WEST FOR LATE TOMORROW
AFTERNOON FOR POSSIBLE TSTM DEVELOPMENT ALONG DRYLINE.

EXTENDED MODELS SHOW CHANCE OF PRECIP THROUGH TUESDAY AS ANOTHER
FRONT STALLS ACROSS THE AREA AND SLOWLY LIFTS NWD AS A WARM FRONT.
LOW CONFIDENCE IN DRASTIC CHANGES IN NOGAPS 850 TEMPS WITH LATEST
RUN...SO WILL NOT CHANGE TEMPS TOO MUCH FROM PREVIOUS FORECAST.

FCSTID = 17/MMT
OKC   70  95  72  96 /  20  10  20  20
HBR   65  99  73 100 /   0  20  20  20
SPS   72  97  74  99 /  20  20  20  20
GAG   58  95  67  97 /   0  20  20  20
PNC   68  95  72  97 /  10  10  20  20
DUA   75  92  76  95 /  40  20  20  20

.OUN...
OK...SVR TSTM WATCH UNTIL 10 PM ZONES 20-26-28>32.
TX...NONE.

In the hours before

Local storm report, Jun 18, 5:55 PM CDT, 3 hours 20 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, Jun 18, 5:55 PM CDT, 3 hours 20 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, Jun 18, 8:24 PM CDT, 51 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, Jun 18, 8:24 PM CDT, 51 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, Jun 18, 9:15 PM CDT, 0 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, Jun 18, 9:15 PM CDT, 0 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
Jun 18, 7:28 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson, Stephens	47 min
Jun 18, 7:43 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	47 min
Jun 18, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	48 min
Jun 18, 8:26 PM CDT	Severe Thunderstorm Warning	OUN	Carter	49 min
Jun 18, 8:30 PM CDT	Flash Flood Warning	OUN	Carter, Jefferson	2 hr
Jun 18, 8:45 PM CDT	Severe Thunderstorm Warning	OUN	Love	45 min
Jun 18, 8:59 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	46 min
Jun 18, 9:31 PM CDT	Severe Thunderstorm Warning	OUN	Love	44 min
Jun 18, 9:45 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	45 min
Jun 18, 9:50 PM CDT	Flash Flood Warning	OUN	Love	115 min
Jun 18, 10:14 PM CDT	Severe Thunderstorm Warning	OUN	Love	46 min
Jun 18, 10:29 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	46 min
Jun 18, 10:30 PM CDT	Flash Flood Warning	OUN	Jefferson	2 hr
Jun 18, 11:16 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	44 min
Jun 19, 12:00 AM CDT	Severe Thunderstorm Warning	OUN	Stephens	45 min
Jun 19, 12:42 AM CDT	Severe Thunderstorm Warning	OUN	Stephens	48 min
Jun 19, 5:22 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	38 min
Jun 19, 5:43 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	47 min
Jun 19, 5:52 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	58 min
Jun 19, 6:15 PM CDT	Severe Thunderstorm Warning	OUN	Kay	45 min
Jun 19, 6:26 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian	49 min
Jun 19, 6:30 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant	30 min
Jun 19, 6:54 PM CDT	Tornado Warning	OUN	Garfield	36 min
Jun 19, 6:59 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	31 min
Jun 18, 9:28 PM CDT	Severe Thunderstorm Warning	OUN	Clay	32 min
Jun 18, 9:57 PM CDT	Severe Thunderstorm Warning	OUN	Clay	33 min
Jun 19, 5:15 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Wilbarger	45 min
Jun 19, 5:52 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Wichita, Wilbarger	58 min
Jun 19, 6:19 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	41 min
Jun 19, 6:55 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Wilbarger	50 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1998 Every severe thunderstorm warning in 1998

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; radar from the NEXRAD Level II archive.