Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Norman, OK

August 9, 2012Atoka County, Oklahoma

NWS Norman, OK issued this special weather statement at Aug 9, 2012, 3:29 PM CDT for Atoka County, Oklahoma. It was in force for 46 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: Aug 9, 2012, 3:29 PM CDT (20:29 UTC)
Expired: Aug 9, 2012, 4:15 PM CDT
In force: 46 min
Issued by: NWS Norman, OK

County Atoka County, OK

The radar

The Norman radar (KTLX), 169 km from the middle of the area, began a volume at 20:29 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 12:00Z, 8.5 hours before the alert went out and 169 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: 538 J/kg
Mixed-layer CIN: -280 J/kg
Mixed-layer LCL: 1618 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 191 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Aug 9, 12:18 PM CDT, 3 hours 11 minutes earlier.

Area forecast discussion, Aug 9, 12:18 PM CDT, 3 hours 11 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
1218 PM CDT THU AUG 9 2012

.AVIATION...
N WINDS BEHIND A COLD FRONT WILL PERSIST THROUGH THE PERIOD. SOME
DIRECTIONAL VARIATION IS LIKELY THIS AFTERNOON...ESPECIALLY IN W
OK AND KSPS. A FEW TSRA MAY FROM NEAR THE FRONT IN SE OK THIS
AFTERNOON...BUT SHOULD BE FAR FROM OUR TAF SITES.
OTHERWISE...EXPECT ONLY HIGH CLOUDS AND GOOD VISIBILITY THROUGH
MIDDAY TOMORROW.

&&

.PREV DISCUSSION... /ISSUED 704 AM CDT THU AUG 9 2012/

AVIATION...
COLD FRONT OVER NORTHWEST OKLAHOMA WILL MOVE THROUGH THE TAF SITES
THIS MORNING. WINDS WILL BECOME NORTH BEHIND THE FRONT WITH
RELATIVELY GUSTY WINDS IN THE AFTERNOON. NO SIGNIFICANT WEATHER IS
EXPECTED.

PREV DISCUSSION... /ISSUED 451 AM CDT THU AUG 9 2012/

DISCUSSION...
COLD FRONT CURRENTLY IN NORTHWESTERN OKLAHOMA WILL CONTINUE TO
ADVANCE SOUTHEAST TODAY EXITING THE SOUTHEAST CORNER OF THE
FORECAST AREA EARLY THIS AFTERNOON. SLIGHTLY COOLER TEMPERATURES
ARE EXPECTED TODAY IN MANY AREAS /ALTHOUGH THIS COMPARISON IS
SOMEWHAT COMPLICATED IN LOCATIONS THAT HAD STORMS NEARBY
YESTERDAY/... BUT THE SOMEWHAT LOWER TEMPERATURES WILL BE MORE
APPARENT BEGINNING TOMORROW AS TEMPERATURES FINALLY RETURN TO
VALUES CLOSER TO AVERAGE FOR THIS TIME OF YEAR. THE FRONT WILL
LIKELY BE SOUTH OF THE AREA BY THE TIME AFTERNOON STORMS
DEVELOP... BUT WILL KEEP SLIGHT CHANCE POPS IN THE SOUTH FOR
TODAY.

MEDIUM RANGE MODELS ARE GENERALLY ON THE SAME PAGE IN THE BROAD
TERMS WITH THE LARGE SCALE WEATHER PATTERN AND WITH A FRONT
MOVING THROUGH ON SUNDAY/MONDAY STILL SHOW BIG DIFFERENCES IN HOW
MUCH COOLING WILL COME WITH THIS FRONT. HAVE KEPT FORECAST CLOSER
TO THE WARMER ECMWF.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK 100  68  94  65 /   0   0   0   0
HOBART OK        102  67  96  65 /   0   0   0   0
WICHITA FALLS TX 106  71  99  68 /  10   0   0   0
GAGE OK           96  61  94  61 /   0   0   0   0
PONCA CITY OK     94  65  93  63 /   0   0   0   0
DURANT OK        100  71  96  67 /  20  10   0   0

&&

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

06/23/23

Hazardous weather outlook, Aug 9, 11:30 AM CDT, 3 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1130 AM CDT THU AUG 9 2012

OKZ004>048-050>052-TXZ083>090-101200-
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-
1130 AM CDT THU AUG 9 2012

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

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

THUNDERSTORM OUTLOOK...
ISOLATED THUNDERSTORMS WILL BE POSSIBLE ACROSS FAR SOUTHERN
OKLAHOMA MAINLY AFTER 3 OR 4 PM.

DISCUSSION...
A FEW THUNDERSTORMS MAY DEVELOP ALONG OR NEAR A COLD FRONT
THIS AFTERNOON AS IT MOVES ACROSS SOUTH CENTRAL AND SOUTHEAST
OKLAHOMA.  IF STORMS DO FORM...A FEW MAY PRODUCE DAMAGING WIND
GUSTS OVER 60 MPH...ALONG WITH BRIEF BUT HEAVY RAINFALL.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT FRIDAY AUG 10.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...25 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...60 PERCENT.

OTHER HAZARDOUS WEATHER...
THE WILDFIRE DANGER WILL CONTINUE TO BE A CONCERN ACROSS THE REGION.
GUSTY NORTH WINDS BEHIND THE COLD FRONT WILL KEEP THE WILDFIRE
DANGER VERY HIGH TO EXTREME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

THUNDERSTORM OUTLOOK...
ISOLATED THUNDERSTORMS WILL BE POSSIBLE ALONG ANOTHER COLD
FRONT THAT WILL PASS OVER THE REGION LATE SATURDAY AND SUNDAY.

OTHER HAZARDOUS WEATHER...
THE WILDFIRE DANGER WILL REMAIN VERY HIGH DUE TO SIGNIFICANT DROUGHT
CONDITIONS.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM
FRIDAY.

In the hours before

Special weather statement, Aug 9, 3:29 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
329 PM CDT THU AUG 9 2012

OKZ048-092115-
ATOKA OK-
329 PM CDT THU AUG 9 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ATOKA COUNTY
UNTIL 415 PM CDT...

AT 320 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES EAST OF
ATOKA...MOVING SOUTHEAST AT 25 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 50 MPH...

LOCATIONS IMPACTED INCLUDE...
LANE...DARWIN...MCGEE CREEK LAKE AND BENTLEY.

LAT...LON 3415 9599 3416 9602 3429 9616 3447 9604
      3438 9578 3419 9578
TIME...MOT...LOC 2020Z 299DEG 23KT 3436 9606

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 7:00 PM CDT	Severe Thunderstorm Warning	OUN	Atoka	15 min
Aug 8, 7:18 PM CDT	Special Weather Statement	OUN	Atoka, Coal	42 min
Aug 8, 7:43 PM CDT	Special Weather Statement	OUN	Atoka	32 min
Aug 9, 1:43 PM CDT	Red Flag Warning	OUN	Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 23 more	5 hr
Aug 9, 3:34 PM CDT	Severe Thunderstorm Warning	OUN	Atoka	41 min
Aug 9, 3:53 PM CDT	Severe Thunderstorm Warning	OUN	Bryan	52 min
Aug 9, 4:49 PM CDT	Special Weather Statement	OUN	Bryan	26 min

Nearby

Special Weather Statements in Oklahoma, 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.