Alert archive / Texas / Special Weather Statements in 2012

Special Weather Statement, NWS Norman, OK

April 10, 2012Wichita County, Texas

NWS Norman, OK issued this special weather statement at Apr 10, 2012, 2:40 AM CDT for Wichita County, Texas. 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 outline as issued.

The facts

Issued: Apr 10, 2012, 2:40 AM CDT (07:40 UTC)
Expired: Apr 10, 2012, 3:15 AM CDT
In force: 35 min
Issued by: NWS Norman, OK

County Wichita County, TX

The radar

The Altus AFB radar (KFDR), 61 km from the middle of the area, began a volume at 07:42 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

Norman, OK (KOUN), launched 00:00Z, 7.7 hours before the alert went out and 201 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: 900 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 726 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 10, 12:50 AM CDT, 1 hour 50 minutes earlier.

Area forecast discussion, Apr 10, 12:50 AM CDT, 1 hour 50 minutes before

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Hazardous weather outlook, Apr 9, 8:35 PM CDT, 6 hours 5 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE NORMAN OK
835 PM CDT MON APR 9 2012

OKZ004>048-050>052-TXZ083>090-101000-
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-
835 PM CDT MON APR 9 2012

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

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
ISOLATED SEVERE THUNDERSTORMS WILL OCCUR.

LOCATION...
SEVERE STORMS ARE EXPECTED WEST OF A LINE EXTENDING FROM FAIRVIEW...
TO WATONGA...CHICKASHA...AND WAURIKA.

TIMING...
SEVERE THUNDERSTORMS WILL BE MOST LIKELY THROUGH MIDNIGHT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THROUGH MIDNIGHT.

DISCUSSION...
ISOLATED SEVERE STORMS WILL CONTINUE TO MOVE SOUTH OVER WESTERN
OKLAHOMA AND WESTERN NORTH TEXAS THROUGH LATE THIS EVENING. ALTHOUGH
HAIL TWO-INCHES IN DIAMETER AND WIND GUSTS TO 70 MPH ARE STILL
POSSIBLE AT 830 PM...INCREASING STABILITY WILL ALLOW THE OVERALL
SEVERE WEATHER IMPACTS TO DECREASE WITH TIME.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT TUESDAY APR 10.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...100 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORM CHANCES WILL CONTINUE THROUGH MOST OF THE WEEK. THERE
IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TUESDAY AFTERNOON AND
EVENING ACROSS EXTREME WESTERN OKLAHOMA AND EXTREME WESTERN NORTH
TEXAS. THE MAIN THREATS WILL BE LARGE HAIL AND DAMAGING WINDS. THERE
IS ALSO A SIGNIFICANT RISK OF SEVERE WEATHER AGAIN ON
THURSDAY...FRIDAY...AND SATURDAY ACROSS MOST OF OKLAHOMA...AND
NEAR THE RED RIVER IN WESTERN NORTH TEXAS.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 5 AM TUESDAY.

In the hours before

Special weather statement, Apr 9, 9:21 PM CDT, 5 hours 19 minutes before

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Special weather statement, Apr 9, 10:00 PM CDT, 4 hours 40 minutes before

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Local storm report, Apr 9, 10:41 PM CDT, 3 hours 59 minutes before

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Special weather statement, Apr 9, 11:39 PM CDT, 3 hours 1 minute before

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Special weather statement, Apr 10, 12:59 AM CDT, 1 hour 41 minutes before

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Special weather statement, Apr 10, 2:40 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 7:17 PM CDT	Special Weather Statement	OUN	Kay	28 min
Apr 9, 7:27 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	63 min
Apr 9, 8:30 PM CDT	Special Weather Statement	OUN	Custer	45 min
Apr 9, 8:59 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Washita	25 min
Apr 9, 10:00 PM CDT	Special Weather Statement	OUN	Cotton, Jefferson	30 min
Apr 9, 11:39 PM CDT	Special Weather Statement	OUN	Harmon	51 min
Apr 10, 12:59 AM CDT	Special Weather Statement	OUN	Kiowa	31 min
Apr 10, 8:01 AM CDT	Dense Fog Advisory	OUN	Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 22 more	119 min
Apr 9, 7:36 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	54 min
Apr 9, 8:29 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	27 min
Apr 9, 9:21 PM CDT	Special Weather Statement	OUN	Hardeman	24 min

Nearby

Special Weather Statements in Texas, 2012 Every special weather statement in 2012

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.