Alert archive / Oklahoma / Flash Flood Warnings in 1994

Flash Flood Warning 15, NWS Norman, OK

June 8, 1994McClain County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jun 8, 1994, 3:55 PM CDT for McClain County, Oklahoma. It was in force for 110 min.

The area

The counties it named.

The facts

Issued
Jun 8, 1994, 3:55 PM CDT (20:55 UTC)
Expired
Jun 8, 1994, 5:45 PM CDT
In force
110 min
Issued by
NWS Norman, OK
Area
Whole counties

County McClain County, OK

The radar

The Norman radar (KTLX), 39 km from the middle of the area, began a volume at 20:59 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.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 8.9 hours before the alert went out and 24 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-pSkew-T log-p diagram, Norman, OK at 12:00Z on 1994-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1937 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 1994-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 444 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1937 J/kg
Mixed-layer CIN
-497 J/kg
Mixed-layer LCL
1514 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
444 m²/s²
0-3 km storm-relative helicity
462 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 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 Jun 8, 3:49 PM CDT, 6 minutes earlier.

Area forecast discussion, Jun 8, 3:49 PM CDT, 6 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>

In the hours before

Special weather statement, Jun 8, 12:30 PM CDT, 3 hours 25 minutes before
OKZ004>053-TXZ083>090-091200-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
1230 PM CDT WED JUN 8 1994

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS TONIGHT ACROSS PORTIONS
OF NORTH-CENTRAL AND EAST-CENTRAL OKLAHOMA TO THE EAST OF A LINE FROM
CHEROKEE TO GUTHRIE TO SEMINOLE. THERE IS ALSO A SLIGHT RISK OF SEVERE
THUNDERSTORMS THIS AFTERNOON AND TONIGHT FROM NORTHWESTERN OKLAHOMA
THROUGH CENTRAL INTO SOUTHEASTERN OKLAHOMA. THE SLIGHT RISK AREA IS EAST
OF A LINE FROM SHATTUCK TO ANADARKO TO WAURIKA.

A COMPLICATED WEATHER PATTERN HAS DEVELOPED ACROSS OKLAHOMA THIS
AFTERNOON WITH SEVERAL FEATURES THAT MAY SUPPORT SEVERE THUNDERSTORMS.
AN OUTFLOW BOUNDARY FROM THUNDERSTORMS EARLIER THIS MORNING IN
NORTHEASTERN OKLAHOMA EXTENDS FROM SOUTH OF TULSA TO NEAR KINGFISHER.
THIS BOUNDARY INTERSECTS WITH A DRYLINE THAT EXTENDS FROM NORTHERN
BLAINE COUNTY SOUTHWARD TO NEAR HOBART. THUNDERSTORMS MAY DEVELOP LATE
THIS AFTERNOON ALONG THESE BOUNDARIES...BUT DEVELOPMENT IS UNCERTAIN
BECAUSE OF A STRONG CAP OVER THE AREA. IF WIND CONVERGENCE ALONG THESE
BOUNDARIES IS SUFFICIENT TO BREAK THE CAP...THEN THE RESULTING
THUNDERSTORMS WILL QUICKLY BECOME SEVERE. IN ADDITION...AN EXTREMELY
UNSTABLE ATMOSPHERE AND FAVOURABLE WIND SHEAR WILL LEAD TO THE
POSSIBILITY OF SUPERCELLS AND TORNADOES.

THUNDERSTORM DEVELOPMENT IS MORE LIKELY IN WESTERN AND CENTRAL KANSAS
THIS AFTERNOON WHERE THE CAP IS WEAKER. THESE THUNDERSTORMS WILL LIKELY
MOVE SOUTHEASTWARD INTO NORTH-CENTRAL AND EAST-CENTRAL OKLAHOMA TONIGHT.
THE AREA MOST LIKELY TO EXPERIENCE THIS ACTIVITY IS ACROSS THE MODERATE
RISK AREA. STRONG WINDS AND VERY LARGE HAIL WILL BE THE MAIN WEATHER
THREAT FROM THESE STORMS...BUT THE POSSIBILITY OF WEAK TORNADOES ALSO
EXISTS.

IN SOUTHWESTERN OKLAHOMA AND THE WESTERN PARTS OF NORTH TEXAS...SEVERE
THUNDERSTORM DEVELOPMENT IS NOT LIKELY DUE TO DRY AIR BEHIND THE DRYLINE
AND A STRONGER CAP ALOFT.

STORM SPOTTER AND EMERGENCY MANAGEMENT GROUPS SHOULD STAY UP-TO-DATE ON
WEATHER DEVELOPMENTS TODAY AND BE PREPARED FOR POSSIBLE ACTIVATION THIS
AFTERNOON AND TONIGHT.

BSC
Special weather statement, Jun 8, 12:32 PM CDT, 3 hours 23 minutes before
OKZ004>053-TXZ083>090-091200-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
1230 PM CDT WED JUN 8 1994

THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS TONIGHT ACROSS PORTIONS
OF NORTH-CENTRAL AND EAST-CENTRAL OKLAHOMA TO THE EAST OF A LINE FROM
CHEROKEE TO GUTHRIE TO SEMINOLE. THERE IS ALSO A SLIGHT RISK OF SEVERE
THUNDERSTORMS THIS AFTERNOON AND TONIGHT FROM NORTHWESTERN OKLAHOMA
THROUGH CENTRAL INTO SOUTHEASTERN OKLAHOMA. THE SLIGHT RISK AREA IS EAST
OF A LINE FROM SHATTUCK TO ANADARKO TO WAURIKA.

A COMPLICATED WEATHER PATTERN HAS DEVELOPED ACROSS OKLAHOMA THIS
AFTERNOON WITH SEVERAL FEATURES THAT MAY SUPPORT SEVERE THUNDERSTORMS.
AN OUTFLOW BOUNDARY FROM THUNDERSTORMS EARLIER THIS MORNING IN
NORTHEASTERN OKLAHOMA EXTENDS FROM SOUTH OF TULSA TO NEAR KINGFISHER.
THIS BOUNDARY INTERSECTS WITH A DRYLINE THAT EXTENDS FROM NORTHERN
BLAINE COUNTY SOUTHWARD TO NEAR HOBART. THUNDERSTORMS MAY DEVELOP LATE
THIS AFTERNOON ALONG THESE BOUNDARIES...BUT DEVELOPMENT IS UNCERTAIN
BECAUSE OF A STRONG CAP OVER THE AREA. IF WIND CONVERGENCE ALONG THESE
BOUNDARIES IS SUFFICIENT TO BREAK THE CAP...THEN THE RESULTING
THUNDERSTORMS WILL QUICKLY BECOME SEVERE. IN ADDITION...AN EXTREMELY
UNSTABLE ATMOSPHERE AND FAVOURABLE WIND SHEAR WILL LEAD TO THE
POSSIBILITY OF SUPERCELLS AND TORNADOES.

THUNDERSTORM DEVELOPMENT IS MORE LIKELY IN WESTERN AND CENTRAL KANSAS
THIS AFTERNOON WHERE THE CAP IS WEAKER. THESE THUNDERSTORMS WILL LIKELY
MOVE SOUTHEASTWARD INTO NORTH-CENTRAL AND EAST-CENTRAL OKLAHOMA TONIGHT.
THE AREA MOST LIKELY TO EXPERIENCE THIS ACTIVITY IS ACROSS THE MODERATE
RISK AREA. STRONG WINDS AND VERY LARGE HAIL WILL BE THE MAIN WEATHER
THREAT FROM THESE STORMS...BUT THE POSSIBILITY OF WEAK TORNADOES ALSO
EXISTS.

IN SOUTHWESTERN OKLAHOMA AND THE WESTERN PARTS OF NORTH TEXAS...SEVERE
THUNDERSTORM DEVELOPMENT IS NOT LIKELY DUE TO DRY AIR BEHIND THE DRYLINE
AND A STRONGER CAP ALOFT.

STORM SPOTTER AND E<MERGENCY MANAGEMENT GROUPS SHOULD STAY UP-TO-DATE ON
WEATHER DEVELOPMENTS TODAY AND BE PREPARED FOR POSSIBLE ACTIVATION THIS
AFTERNOON AND TONIGHT.

BSC

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 2:15 PM CDTFlash Flood WarningOUNGrady2 hr
Jun 8, 3:55 PM CDTFlash Flood WarningOUNGrady, Stephens110 min

Nearby

Flash Flood Warnings in Oklahoma, 1994Every flash flood warning in 1994

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; radar from the NEXRAD Level II archive.