Alert archive / Oklahoma / Flash Flood Warnings in 1999

Flash Flood Warning 65, NWS Norman, OK

June 30, 1999Noble County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jun 30, 1999, 3:20 AM CDT for Noble 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: Jun 30, 1999, 3:20 AM CDT (08:20 UTC)
Expired: Jun 30, 1999, 6:15 AM CDT
In force: 3 hr
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Noble County, OK

The radar

The Vance AFB radar (KVNX), 89 km from the middle of the area, began a volume at 08:20 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 00:00Z, 8.3 hours before the alert went out and 131 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: 567 J/kg
Mixed-layer CIN: -317 J/kg
Mixed-layer LCL: 1460 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 Jun 30, 3:20 AM CDT, 0 minutes earlier.

Area forecast discussion, Jun 30, 3:20 AM CDT, 0 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
320 AM CDT WED JUN 30 1999

SITUATION SETTING UP LATER TODAY AND TONIGHT MUCH LIKE THIS MORNING.
ANOTHER WAVE MOVES SE IN STRONG WEST-NORTHWEST UPPER FLOW. UPPER JET
STREAKING ACROSS CENTRAL ROCKIES INTO THE PLAINS IN EXCESS OF 100
KTS WILL HELP INDUCE PRESSURE FALLS IN LEE OF ROCKIES WITH SFC LOW
REDEVELOPING IN SOUTHEAST CO. WARM FRONT SHOULD TRY AGAIN TO PUSH
NORTH ACROSS PORTIONS OF THE STATE TODAY KEEPING VERY MOIST AND
UNSTABLE AIR PRESENT. NORTHWARD MOVEMENT OF FRONT COULD BE HINDERED
BY ONGOING CONVECTION...WHICH WILL BE SLOW TO MOVE ACROSS THE AREA
THIS MORNING. COULD SEE SOME ADDITIONAL ACTIVITY DURING THE DAY WITH
SURFACE HEATING...ESPECIALLY WHERE SUN IS ABLE TO BREAK THRU AND
WITH NUMEROUS BOUNDARIES FROM THIS MORNING STORMS. MORE WIDESPREAD
ACTIVITY SHOULD DEVELOP IN THE HIGH PLAINS OF EASTERN CO THIS
AFTERNOON AND EVENING AS UPPER WAVE COMES OUT OF ROCKIES. WITH
EASTERLY SFC FLOW NORTH OF FRONT AND GOOD TURNING OF THE WIND
FIELDS...ALONG WITH CAPES IN EXCESS OF 3000 TO 4000 K/KG STORMS
SHOULD BE SUPERCELLULAR IN NATURE THRU THE EVENING. THEN DEVELOP
INTO A MCS ACCOMPANIED BY PRIMARILY HAIL AND STRONG WINDS. THIS
COMPLEX SHOULD THEN MOVE SOUTHEAST ACROSS THE STATE OVERNIGHT AND
EARLY ON THURSDAY. BECAUSE OF THIS WILL PUT A CHANCE OF
THUNDERSTORMS BACK IN FOR THURSDAY MOST AREAS.

STILL APPEARS THAT RIDGE SHOULD BUILD IN OVER THE HOLIDAY WEEKEND
SHUTTING DOWN THE PRECIP AND HEATING THINGS UP. STILL THINK MOST
AREA WILL HAVE A HARD TIME REACHING THE CENTURY MARK WITH ALL THE
PRECIP THAT HAS FALLEN ACROSS THE AREA THE PAST FEW WEEKS. LAST TWO
RUNS OF MRF...NOT INCLUDING TONIGHT...SHOW SOME ENERGY UNDERCUTTING
THE RIDGE AS AN EASTERLY WAVE AND MOVING ACROSS BY LATE IN THE
WEEKEND WHICH COULD PROVIDE SOME PRECIP TO SOUTHERN SECTIONS BY
SUNDAY...BUT FOR NOW WILL LEAVE THE 4TH DRY.

FCSTID = 30
OKC   86  73  91  73 /  50  40  30  10
HBR   90  73  93  73 /  40  40  20  10
SPS   90  75  95  75 /  50  40  20  10
GAG   88  71  93  70 /  30  40  20  10
PNC   86  73  92  71 /  50  40  30  10
DUA   88  74  91  74 /  50  30  30  10

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

In the hours before

Local storm report, Jun 30, 12:42 AM CDT, 2 hours 38 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1242 AM CDT WED JUN 30 1999

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

1237 AM    I-40 AND CUSTER CITY EXIT OK   1.00 INCH HAIL
06/30/99   CUSTER

CW

Local storm report, Jun 30, 12:42 AM CDT, 2 hours 38 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1242 AM CDT WED JUN 30 1999

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

1237 AM    I-40 AND CUSTER CITY EXIT OK   1.00 INCH HAIL
06/30/99   CUSTER

CW

Local storm report, Jun 30, 2:29 AM CDT, 51 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
229 AM CDT WED JUN 30 1999

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

0230 AM    3 W BUFFALO               OK   FLOODING
06/30/99   HARPER                         WATER OVER ROAD ON HWY 64

Local storm report, Jun 30, 2:29 AM CDT, 51 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
229 AM CDT WED JUN 30 1999

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

0230 AM    3 W BUFFALO               OK   FLOODING
06/30/99   HARPER                         WATER OVER ROAD ON HWY 64

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 10:43 PM CDT	Severe Thunderstorm Warning	OUN	Custer	47 min
Jun 29, 10:54 PM CDT	Tornado Warning	OUN	Custer	36 min
Jun 29, 11:30 PM CDT	Tornado Warning	OUN	Custer, Washita	30 min
Jun 29, 11:57 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Washita	48 min
Jun 30, 1:24 AM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	51 min
Jun 30, 2:16 AM CDT	Flash Flood Warning	OUN	Harper	3 hr
Jun 30, 2:21 AM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	39 min
Jun 30, 3:00 AM CDT	Severe Thunderstorm Warning	OUN	Ellis, Woodward	45 min
Jun 30, 4:05 AM CDT	Severe Thunderstorm Warning	OUN	Ellis	40 min
Jun 30, 5:51 AM CDT	Severe Thunderstorm Warning	OUN	Ellis	54 min
Jun 30, 5:55 AM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	65 min
Jun 30, 7:46 AM CDT	Severe Thunderstorm Warning	OUN	Beckham	44 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; radar from the NEXRAD Level II archive.