Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 460, NWS Norman, OK

August 13, 2006Alfalfa County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 13, 2006, 7:40 PM CDT for Alfalfa County, Oklahoma. It was in force for 35 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 13, 2006, 7:40 PM CDT (00:40 UTC)
Expired
Aug 13, 2006, 8:15 PM CDT
In force
35 min
Issued by
NWS Norman, OK
Area
Counties, with a storm outline in the text

County Alfalfa County, OK

The radar

The Vance AFB radar (KVNX), 18 km from the middle of the area, began a volume at 00:42 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

Dodge City, (KDDC), launched 00:00Z, 0.7 hours before the alert went out and 181 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, Dodge City, at 00:00Z on 2006-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1217 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, Dodge City, at 00:00Z on 2006-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
1217 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
1530 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
56 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 13, 1:59 PM CDT, 5 hours 41 minutes earlier.

Area forecast discussion, Aug 13, 1:59 PM CDT, 5 hours 41 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
159 PM CDT SUN AUG 13 2006

.DISCUSSION...
THE COLD FRONT THAT RANGED FROM NORTHEAST NM INTO SOUTHEAST NE AT
MID-AFTERNOON SHOULD APPROACH NORTHWEST OK LATE THIS EVENING. THE
LOW-LEVEL JET, EXPECTED TO ESTABLISH ITSELF ACROSS THE EASTERN TX
PAN HANDLE TONIGHT WILL PROVIDE MORE LIFT OVER THE FRONT TO BRING
RAIN CHANCES TO LIKELY IN NORTHWEST OK OVERNIGHT. SEASONALLY
SIGNIFICANTLY COOLER AIR AND OVERNIGHT SHOWERS/THUNDERSTORMS ALONG
THE FRONT SHOULD DRIVE IT INTO CENTRAL OK BY MID-DAY MONDAY AND
INTO THE SOUTHERN 1/3 OF OK MONDAY EVENING. A GOOD CHANCE FOR RAIN
SHOULD EXIST ACROSS SOUTHWEST OK AND ADJACENT PARTS OF NORTH TX
MONDAY NIGHT AS A WEAKER LOW-LEVEL JET SHOULD ENHANCE LIFT ALONG
THE FRONT THERE.

LESSER CHANCES FOR RAIN EXIST TUESDAY AS THE FRONT MOVES SOUTH AND
WEAKENS. HIGH TEMPERATURES MONDAY IN NORTHWEST OK BEHIND THE FRONT
SHOULD BE 15 DEGREES COOLER THAN TODAY. MUCH OF THE STATE WILL SEE
COOLER AIR TUESDAY BEFORE A GRADUAL WARM UP STARTS WEDNESDAY. BY
THE END OF THE WEEK, THE UPPER RIDGE IS EXPECTED TO BE CLOSE TO
THE SOUTHERN PLAINS WITH TEMPERATURES ONCE AGAIN ABOVE NORMALS.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  75  93  68  90 /  20  40  40  20
HOBART OK         74  91  69  90 /  30  50  40  30
WICHITA FALLS TX  77  99  72  97 /  20  30  40  30
GAGE OK           67  84  63  87 /  70  60  20  30
PONCA CITY OK     73  88  66  89 /  40  50  30  20
DURANT OK         77 100  73  97 /  20  30  40  30

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.
&&

99/99
Hazardous weather outlook, Aug 13, 7:32 PM CDT, 8 minutes before
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In the hours before

Special weather statement, Aug 13, 7:03 PM CDT, 37 minutes before
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Special weather statement, Aug 13, 7:09 PM CDT, 31 minutes before
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Local storm report, Aug 13, 7:14 PM CDT, 26 minutes before
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Local storm report, Aug 13, 7:22 PM CDT, 18 minutes before
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Special weather statement, Aug 13, 7:25 PM CDT, 15 minutes before
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Special weather statement, Aug 13, 7:33 PM CDT, 7 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 7:04 PM CDTSevere Thunderstorm WarningOUNGrant41 min
Aug 14, 3:34 PM CDTSevere Thunderstorm WarningOUNCleveland41 min
Aug 14, 3:38 PM CDTSevere Thunderstorm WarningOUNLincoln23 min
Aug 14, 4:18 PM CDTSevere Thunderstorm WarningOUNOklahoma42 min
Aug 14, 4:47 PM CDTSevere Thunderstorm WarningOUNWashita28 min
Aug 14, 5:18 PM CDTSevere Thunderstorm WarningOUNCuster, Washita42 min
Aug 14, 5:57 PM CDTSevere Thunderstorm WarningOUNGrady48 min
Aug 14, 6:15 PM CDTSevere Thunderstorm WarningOUNCanadian45 min
Aug 14, 6:20 PM CDTSevere Thunderstorm WarningOUNCaddo25 min
Aug 14, 6:31 PM CDTSevere Thunderstorm WarningOUNMcClain29 min
Aug 14, 6:49 PM CDTSevere Thunderstorm WarningOUNCleveland, Oklahoma41 min
Aug 14, 6:56 PM CDTSevere Thunderstorm WarningOUNCanadian49 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.