Alert archive / Oklahoma / Flash Flood Warnings in 1999

Flash Flood Warning 38, NWS Norman, OK

June 9, 19994 counties in Oklahoma

NWS Norman, OK issued this flash flood warning at Jun 9, 1999, 7:30 PM CDT for 4 counties in 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
Jun 9, 1999, 7:30 PM CDT (00:30 UTC)
Expired
Jun 9, 1999, 10:30 PM CDT
In force
3 hr
Issued by
NWS Norman, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Alfalfa County, OK, Garfield County, OK, Grant County, OK, Major County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.5 hours before the alert went out and 161 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 00:00Z on 1999-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1143 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 00:00Z on 1999-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.1939Sfc1 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
1143 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1477 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
87 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 9, 3:50 PM CDT, 3 hours 40 minutes earlier.

Area forecast discussion, Jun 9, 3:50 PM CDT, 3 hours 40 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
350 PM CDT WED JUN 9 1999

NOT MUCH CHANGE IN THE BIG PICTURE NEXT COUPLE DAYS, WITH TROPICAL
AIR MASS RESULTING IN SCATTERED MAINLY DIURNAL CONVECTION. BEST
LOCATIONS FOR CONVECTIVE DEVELOPMENT WILL LIKELY BE DETERMINED BY
MESOSCALE FACTORS, INCLUDING BUT NOT LIMITED TO RESIDUAL OUTFLOW
BOUNDARIES FROM ANY ACTIVITY THAT ORGANIZES SUFFICIENTLY. CURRENT
ACTIVITY IN NORTHERN OK IS ASSOCIATED WITH A SURFACE CONFLUENCE ZONE
THAT SHOWS UP NICELY ON MESONET. EXPECT ADDITIONAL STORMS TO DEVELOP
LATER THIS AFTERNOON/EVENING OVER HIGH PLAINS, IN VICINITY OF
DRYLINE AND FAVORABLE LEFT EXIT REGION OF PERSISTENT SUBTROPICAL
JET. THESE MAY DRIFT INTO WESTERN ZONES OVERNIGHT. ADDITIONAL
DEVELOPMENT LIKELY FARTHER N IN VICINITY OF SURFACE FRONT OVER
SOUTHEAST CO AND WESTERN KS. BOUNDARIES FROM ANY OF THESE COULD MOVE
INTO OUR CWA AND PROVIDE A FOCUS FOR REDEVELOPMENT THU, BUT
KNOT KNOWING WHERE THESE BOUNDARIES MIGHT BE, WE WILL SHOTGUN LOW
POPS OVER ENTIRE CWA THU AFTERNOON.

SOME POTENTIAL FOR MORE WIDESPREAD ACTIVITY THU NIGHT INTO SAT.
POTENTIAL EXISTS FOR MCS THU EVE OVER NE/KS AREA NEAR SURFACE FRONT
PER LATEST QPFPFD. THIS COULD NUDGE THE EFFECTIVE SURFACE BOUNDARY
FARTHER SE, CLOSER TO NW OK THU NIGHT INTO FRI. COMPLEX ALSO COULD
BACKBUILD TO THE SW AND APPROACH NW CORNER OF OK. THUS HIGHER POPS
ACROSS NORTHERN ZONES, AS WELL AS ACROSS WESTERN ZONES WHERE ANOTHER
ROUND APPEARS LIKELY NEAR DRYLINE THU EVENING.

PATTERN CHANGE WILL RESULT IN FRONT SAGGING SE ACROSS AREA FRI NIGHT
AND SAT WITH CORRESPONDING CHANCES OF SHOWERS/T-STORMS. EXPECT
MOSTLY CLEAR CONDITIONS SUN-MON AS SHORTWAVE RIDGE SETS UP OVER
PLAINS, WHILE SURFACE HIGH OVER CO/KS PROVIDES DRIER AND SLIGHTLY
COOLER AIR.

FCSTID = 24
OKC   69  87  69  87 /  20  20  20  20
HBR   68  89  67  90 /  30  20  30  30
SPS   70  90  69  91 /  20  20  20  20
GAG   66  88  65  087 /  30  20  30  30
PNC   70  88  69  89 /  20  20  20  30
DUA   71  87  70  87 /  20  20  20  20

.OUN...
OK...NONE.
TX...NONE.

In the hours before

Local storm report, Jun 9, 3:18 PM CDT, 4 hours 12 minutes before
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Special weather statement, Jun 9, 3:24 PM CDT, 4 hours 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.
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Local storm report, Jun 9, 4:47 PM CDT, 2 hours 43 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
443 PM CDT WED JUN  9 1999

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0435 PM    2 N FAIRMONT              OK   .75 INCH HAIL
06/09/99   GARFIELD                       REPORTED BY PUBLIC

0440 PM    3 W HENNESSEY             OK   1.00 INCH HAIL
06/09/99   KINGFISHER                     REPORTED BY HENHNESSEY PD.

TL
Local storm report, Jun 9, 5:07 PM CDT, 2 hours 23 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
504 PM CDT WED JUN  9 1999

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0346 PM    DRUMMOND                  OK   1.00 INCH HAIL
06/09/99   GARFIELD                       REPORTED BY PUBLIC RELAYED
                                          BY EOC.

TL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 9, 7:04 PM CDTSevere Thunderstorm WarningOUNBlaine46 min
Jun 9, 7:15 PM CDTSevere Thunderstorm WarningOUNMajor45 min
Jun 9, 9:00 PM CDTSevere Thunderstorm WarningOUNGarfield45 min
Jun 9, 9:30 PM CDTFlash Flood WarningOUNBlaine, Kingfisher3 hr
Jun 9, 11:35 PM CDTFlash Flood WarningOUNGarfield, Kingfisher8 hr
Jun 10, 5:31 AM CDTFlash Flood WarningOUNMajor4 hr
Jun 10, 7:28 AM CDTFlash Flood WarningOUNBlaine3 hr
Jun 10, 7:35 AM CDTFlash Flood WarningOUNGarfield, Kingfisher3 hr
Jun 10, 10:35 AM CDTFlash Flood WarningOUNBlaine, Garfield, Kingfisher, Logan, Major6 hr
Jun 10, 1:40 PM CDTSevere Thunderstorm WarningOUNKiowa, Tillman50 min
Jun 10, 2:24 PM CDTFlash Flood WarningOUNKiowa, Tillman3 hr
Jun 10, 5:52 PM CDTSevere Thunderstorm WarningOUNWilbarger38 min
Jun 10, 6:29 PM CDTSevere Thunderstorm WarningOUNWilbarger46 min
Jun 10, 6:42 PM CDTSevere Thunderstorm WarningOUNKnox48 min

Nearby

Flash Flood Warnings in Oklahoma, 1999Every 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.