Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 484, NWS Norman, OK

August 15, 2006Cotton County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 15, 2006, 7:13 PM CDT for Cotton County, Oklahoma. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 15, 2006, 7:13 PM CDT (00:13 UTC)
Expired
Aug 15, 2006, 8:00 PM CDT
In force
47 min
Issued by
NWS Norman, OK
Area
Counties, with a storm outline in the text

County Cotton County, OK

The radar

The Altus AFB radar (KFDR), 56 km from the middle of the area, began a volume at 00:14 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.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.2 hours before the alert went out and 136 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 2006-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 666 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 2006-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 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
666 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
1662 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Aug 15, 3:29 PM CDT, 3 hours 44 minutes earlier.

Area forecast discussion, Aug 15, 3:29 PM CDT, 3 hours 44 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
329 PM CDT TUE AUG 15 2006

.DISCUSSION...
SURFACE FRONT IS SOMEWHAT DIFFUSE THIS AFTERNOON BUT EXTENDS FROM
ROUGHLY MCALESTER TO PAULS VALLEY INTO SOUTHWEST OKLAHOMA.
TEMPERATURES HIT NEAR TRIPLE DIGITS IN SOUTHEAST OKLAHOMA SOUTH OF
THE FRONT WHILE TEMPERATURES STAYED IN THE 80S IN NORTHWEST
OKLAHOMA NORTH OF THE FRONT AND UNDER PERSISTENT CLOUDS. THE AREA
WILL SEE NUMEROUS THUNDERSTORMS AGAIN THIS EVENING. VISIBLE
SATELLITE EARLIER TODAY SHOWED HINTS OF AN MCV MOVING NORTH THROUGH
TEXAS... BUT THAT IS NOT AS APPARENT ANYMORE. STILL MAY SEE SOME
ENHANCEMENT OF COVERAGE IN THAT AREA IF THERE IS STILL ANYTHING
THERE. AT LEAST PRELIMINARILY PUT THE HIGHEST POPS IN THE WESTERN
SECTIONS... BUT MAY REVISE JUST BEFORE ZONE TIME DEPENDING ON
RADAR TRENDS.

THUNDERSTORM CHANCES DECREASE TOMORROW AS MODELS SHOW LESS MID-
LEVEL MOISTURE TO WORK WITH... BUT STILL EXPECT TO SEE AT LEAST
ISOLATED THUNDERSTORMS. HAVE EXPANDED THE GEOGRAPHY OF THE POPS
FOR TOMORROW AND TOMORROW NIGHT ALTHOUGH HAVE KEPT THE POPS LOW.
OTHERWISE WARMING TREND WILL COMMENCE AGAIN WITH TRIPLE-DIGIT
TEMPERATURES RETURNING TO MANY AREAS ON THURSDAY. FRIDAY HAS THE
POTENTIAL TO BE VERY WARM IF LOW-LEVEL TEMPERATURE PROGS FROM THE
NAM AND DGEX VERIFY... BUT ECMWF IS ALREADY FILTERING COOLER AIR
INTO THE AREA ON FRIDAY. HAVE KEPT TEMPERATURES STEADY THURSDAY TO
FRIDAY IN THE NORTH WHILE WARMING A FEW DEGREES IN THE SOUTH IN
THE CURRENT PACKAGE BUT WILL WATCH MODEL TRENDS. REGARDLESS OF
MODEL CHOICE... SOME COOLING IS EXPECTED IN PORTIONS OF THE AREA
THIS WEEKEND.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  72  98  76 101 /  50  20  10  10
HOBART OK         72  97  75 100 /  60  20  20  10
WICHITA FALLS TX  75 101  77 104 /  30  20  10  10
GAGE OK           67  92  71  96 /  60  20  20  10
PONCA CITY OK     71  96  73 100 /  50  20  20  10
DURANT OK         76 102  77 104 /  30  10  10   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.
&&
Hazardous weather outlook, Aug 15, 2:18 PM CDT, 4 hours 55 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
218 PM CDT TUE AUG 15 2006

OKZ004>048-050>052-TXZ083>090-161200-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-NOBLE-
ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-BECKHAM-
WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-CLEVELAND-
POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-JEFFERSON-
CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-FOARD-WILBARGER-
WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
218 PM CDT TUE AUG 15 2006

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THROUGH SUNSET.

DISCUSSION...
SCATTERED SHOWERS AND A FEW THUNDERSTORMS WILL CONTINUE ACROSS
WESTERN NORTH TEXAS AND WESTERN OKLAHOMA AS MOIST AIR IS LIFTED OVER
A WEAK WARM FRONT. THUNDERSTORMS WILL LIKELY BE MORE NUMEROUS IN
WESTERN OKLAHOMA WHERE UPSLOPE LOW LEVEL FLOW AND A WEAK UPPER LEVEL
DISTURBANCE PROVIDE INCREASED LIFT. SEVERE WEATHER WILL BE ISOLATED.
MODERATE INSTABILITY AND HIGH TEMPERATURES THIS AFTERNOON MAY ALLOW
A FEW STORMS TO PRODUCE WIND NEAR 60 MPH WITH HEAVY RAINFALL.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT WEDNESDAY AUG 16.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...15 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THUNDERSTORM OUTLOOK...
SCATTERED THUNDERSTORMS WILL BE POSSIBLE WEDNESDAY MAINLY ACROSS
NORTHERN OKLAHOMA AS THE OLD FRONT CONTINUES TO WEAKEN AND LIFT
NORTHWARD. HIGH PRESSURE WILL THEN REGAIN ITS HOLD... KEEPING THE
REGION DRY UNTIL THE NEXT FRONT APPROACHES FRIDAY NIGHT INTO
SATURDAY BRINGING ANOTHER CHANCE OF THUNDERSTORMS.

OTHER HAZARDOUS WEATHER...
AFTERNOON HEAT INDICES WILL CONTINUE TO RANGE BETWEEN 100 AND 105...
ESPECIALLY ACROSS CENTRAL AND SOUTHERN OKLAHOMA AND WESTERN NORTH
TEXAS... THROUGHOUT THE REMAINDER OF THE WEEK. PEOPLE WITH OUTDOOR
ACTIVITIES SHOULD CONTINUE TO USE CAUTION.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT NOON
TODAY.

In the hours before

Special weather statement, Aug 15, 6:32 PM CDT, 41 minutes before
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Special weather statement, Aug 15, 6:46 PM CDT, 27 minutes before
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Special weather statement, Aug 15, 6:46 PM CDT, 27 minutes before
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Special weather statement, Aug 15, 6:54 PM CDT, 19 minutes before
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Special weather statement, Aug 15, 6:57 PM CDT, 16 minutes before
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Local storm report, Aug 15, 7:07 PM CDT, 6 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 7:23 PM CDTSevere Thunderstorm WarningOUNCaddo52 min
Aug 16, 1:39 PM CDTSevere Thunderstorm WarningOUNCleveland, Pottawatomie36 min
Aug 16, 2:13 PM CDTSevere Thunderstorm WarningOUNCleveland32 min
Aug 16, 2:55 PM CDTSevere Thunderstorm WarningOUNLincoln50 min
Aug 16, 5:36 PM CDTSevere Thunderstorm WarningOUNGarfield, Major39 min
Aug 16, 5:02 PM CDTSevere Thunderstorm WarningOUNBaylor, Knox43 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2006Every severe thunderstorm warning in 2006

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.