Alert archive / Arkansas / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

October 12, 2011Benton County, Arkansas

NWS Tulsa, OK issued this special weather statement at Oct 12, 2011, 3:53 AM CDT for Benton County, Arkansas. It was in force for 37 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: Oct 12, 2011, 3:53 AM CDT (08:53 UTC)
Expired: Oct 12, 2011, 4:30 AM CDT
In force: 37 min
Issued by: NWS Tulsa, OK

County Benton County, AR

The radar

The Western Arkansas radar (KSRX), 106 km from the middle of the area, began a volume at 08:55 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

Springfield, MO (KSGF), launched 00:00Z, 8.9 hours before the alert went out and 85 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: 276 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1250 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

364 
WWUS84 KTSA 120853
SPSTSA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
353 AM CDT WED OCT 12 2011

ARZ001-010-120930-
BENTON AR-WASHINGTON AR-
353 AM CDT WED OCT 12 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 430 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     WESTERN BENTON AND NORTHERN WASHINGTON

AT 353 AM CDT...THE CENTER OF A CLUSTER OF STRONG THUNDERSTORMS WAS 
LOCATED OVER FAIRMOUNT...MOVING EAST AT 20 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
SPRINGTOWN...HIGHFILL...TONTITOWN...CAVE SPRINGS...SPRINGDALE...
LOWELL...ROGERS AND BENTONVILLE.

THESE STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH.

LAT...LON 3614 9410 3611 9455 3634 9457 3646 9408
TIME...MOT...LOC 0853Z 265DEG 18KT 3623 9443

$$

LACY

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 Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Oct 11, 11:28 PM CDT, 4 hours 25 minutes earlier.

Area forecast discussion, Oct 11, 11:28 PM CDT, 4 hours 25 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1128 PM CDT TUE OCT 11 2011

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
EVENING CONVECTION ACROSS WESTERN ARKANSAS HAS FINALLY SHIFTED
EAST OF TERMINAL SITES...WHILE THE NEXT ROUND OF PRECIP CONTINUES
TO EXPAND ACROSS CENTRAL OKLAHOMA. THESE SHOWERS AND THUNDERSTORMS
WILL SPREAD EASTWARD OVERNIGHT...AND WITH AMPLE ELEVATED
INSTABILITY IN PLACE...BRIEF PERIODS OF HEAVY RAIN AND LOWER
CEILINGS ARE LIKELY. THE PRECIP WILL LIKELY END ACROSS OK SITES BY
LATE MORNING...THOUGH LINGER IN A LIGHTER FASHION ACROSS WESTERN
ARKANSAS INTO THE MID AFTERNOON. VFR CONDITIONS RETURN TO ALL
SITES BY LATE WEDNESDAY AFTERNOON.

&&

.PREV DISCUSSION... /ISSUED 907 PM CDT TUE OCT 11 2011/

..UPDATE...

DISCUSSION...
HAVE MADE SEVERAL ADJUSTMENTS TO AREA POPS THIS EVENING AS
PRECIPITATION LINGERS ACROSS FAR EASTERN OKLAHOMA AND NORTHWEST
ARKANSAS. WE CONTINUE TO EXPECT ANOTHER ROUND OF CONVECTION TO
MOVE IN FROM THE WEST AFTER MIDNIGHT. HAVE ALREADY SENT ALL
UPDATED FORECAST PRODUCTS.

PREV DISCUSSION... /ISSUED 635 PM CDT TUE OCT 11 2011/

AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM.
ONGOING CONVECTION WILL CONTINUE EAST OF AR SITES THIS
EVENING...WITH INCREASING MID LEVEL CLOUD OVERNIGHT. SHOWERS AND
THUNDERSTORMS WILL DEVELOP FURTHER WEST AND SPREAD EASTWARD INTO
EASTERN OK BY EARLY WEDNESDAY MORNING...AND CONTINUE EASTWARD INTO
WESTERN ARKANSAS THROUGH THE MORNING INTO MID AFTERNOON HOURS.
GENERALLY MVFR/VFR CEILINGS ARE EXPECTED WITH PERIODIC LOWER
IMPACTS WITH THE HEAVIEST STORMS.

PREV DISCUSSION... /ISSUED 329 PM CDT TUE OCT 11 2011/

DISCUSSION...
SCATTERED THUNDERSTORMS HAVE DEVELOPED THIS AFTERNOON WITHIN THE
MOISTURE AXIS AND DECAYING FRONTAL ZONE OVER FAR EASTERN OKLAHOMA
AND NORTHWEST ARKANSAS...WHERE LI/S OF -4 TO -6 OBSERVED. SHEAR
DOES NOT LOOK OVERLY IMPRESSIVE AND THUS NOT MUCH SEVERE THREAT
THOUGH A BRIEF HAILER POSSIBLE THROUGH THE EVENING. WILL CARRY A
SWATH OF LOW CHANCE POPS THIS EVENING TO ACCOUNT FOR THIS BUT A
GOOD DEAL OF IT EXPECTED TO DECREASE AFTER SUNSET. MOIST AIR WILL
REMAIN IN PLACE WITH A LIGHT SOUTH WIND AND INCREASING CLOUDS...
AND THIS SHOULD KEEP OVERNIGHT LOWS MILDER IN MOST AREAS.

ATTENTION LATER TONIGHT WILL TURN TO CONVECTIVE DEVELOPMENT FROM
TX PANHANDLE INTO WESTERN KS LATER THIS AFTERNOON AND ITS
EVOLUTION OVERNIGHT AS A FAST MOVING AND STRONG SHORTWAVE DIGS
THOUGH THE PLAINS. MODELS ALL IN VARYING DEGREES CONTINUE THE IDEA
OF ORGANIZING THIS ACTIVITY INTO ONE OR MORE CLUSTERS LATE TONIGHT
WHICH WILL LIKELY MAKE A RUN AT EASTERN OK BY EARLY MORNING. GIVEN
THE AMOUNT OF UPPER LEVEL SUPPORT LATE TONIGHT AND EARLY WED
MORNING WITH THE SHORTWAVE PASSAGE...FEEL THAT LIKELY POPS REMAIN
JUSTIFIED FOR EASTERN OK THROUGH THE MORNING...AND POINTS FARTHER
EAST IN THE AFTERNOON AS WEAK FRONTAL BOUNDARY PUSHES EAST. AGAIN
THE SEVERE WEATHER THREAT DOES NOT LOOK THAT GREAT BUT UPPER
DYNAMICS MAY ENHANCE THREAT COMPARED TO THIS AFTERNOON.

FRONT WILL SWEEP THROUGH LATE IN THE DAY AND USHER IN MUCH DRIER
AIR WED NIGHT AND THURSDAY. GUSTY NORTHWEST WINDS WILL RAISE THE
FIRE WEATHER THREAT THURSDAY AFTERNOON AS A RESULT WITH TEMPS
SHOWING VERY LITTLE COOLING BEHIND THIS FRONT. A NICE STRETCH OF
WEATHER WILL ENSUE UNDER A BENIGN WNW FLOW ALOFT THAT WILL
CONTINUE THROUGH THE WEEKEND AS UPPER RIDGE BUILDS OVER THE
SOUTHERN STATES AND WINDS RETURN FROM THE SOUTH. TEMPERATURES WILL
ONCE AGAIN BE WELL ABOVE NORMAL SAT/SUN AND MOST LIKELY MONDAY
AHEAD OF WHAT LOOKS TO BE A SIGNIFICANT COLD FRONT. TIMING OF THIS
FRONTAL PASSAGE REMAINS QUESTIONABLE AND VERY LITTLE MOISTURE
RETURN IS EVIDENT AHEAD OF IT...THUS WILL STICK WITH THE DRY
FORECAST THROUGH TUESDAY AND BRING DAYTIME TEMPS DOWN QUITE A BIT
FOR TUESDAY. GFS FORECAST SFC TEMPS QUITE CHILLY BY MID WEEK.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   63  81  55  79 /  50  60  10   0
FSM   62  79  53  78 /  30  70  10   0
MLC   62  81  52  79 /  30  70  10   0
BVO   57  83  50  79 /  50  30  10   0
FYV   58  78  49  72 /  40  70  10   0
BYV   58  76  52  74 /  40  70  20   0
MKO   61  80  52  78 /  30  70  10   0
MIO   60  81  54  77 /  30  50  10   0
F10   61  80  53  78 /  40  70  10   0
HHW   62  80  53  82 /  20  60  10   0

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
AR...NONE.
&&

AVIATION...07

Hazardous weather outlook, Oct 11, 5:06 PM CDT, 10 hours 47 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
506 PM CDT TUE OCT 11 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-121000-
ADAIR OK-BENTON AR-CARROLL AR-CHEROKEE OK-CHOCTAW OK-CRAIG OK-
CRAWFORD AR-CREEK OK-DELAWARE OK-FRANKLIN AR-HASKELL OK-LATIMER OK-
LE FLORE OK-MADISON AR-MAYES OK-MCINTOSH OK-MUSKOGEE OK-NOWATA OK-
OKFUSKEE OK-OKMULGEE OK-OSAGE OK-OTTAWA OK-PAWNEE OK-PITTSBURG OK-
PUSHMATAHA OK-ROGERS OK-SEBASTIAN AR-SEQUOYAH OK-TULSA OK-WAGONER OK-
WASHINGTON OK-WASHINGTON AR-
506 PM CDT TUE OCT 11 2011

THIS OUTLOOK IS FOR NORTHWEST AND WEST CENTRAL ARKANSAS AS WELL AS
MUCH OF EASTERN OKLAHOMA.

.DAY ONE...TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...NORTHWEST ARKANSAS EARLY AND EASTERN OKLAHOMA LATER.
	ONSET...ONGOING.

DISCUSSION...
ONGOING THUNDERSTORMS ACROSS NORTHWEST ARKANSAS MAY BRIEFLY
APPROACH SEVERE LIMITS THIS EVENING BEFORE MOVING OUT OF THE
AREA. A BETTER CHANCE FOR SEVERE STORMS WILL EXIST LATER OVERNIGHT
AS A COLD FRONT APPROACHES FROM THE WEST.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
LOCAL SPOTTER ACTIVATION MAY BE NEEDED.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.
WEDNESDAY...THUNDERSTORM POTENTIAL.
THURSDAY...HIGH WIND POTENTIAL.
FRIDAY...NO HAZARDS.
SATURDAY...NO HAZARDS.
SUNDAY...NO HAZARDS.
MONDAY...NO HAZARDS.

EXTENDED DISCUSSION...
THUNDERSTORMS ARE EXPECTED TO BE ONGOING EARLY WEDNESDAY MORNING
AS A COLD FRONT MOVES ACROSS THE REGION. SOME STORMS COULD BE
SEVERE. THIS ACTIVITY WILL START AT THE WESTERN EDGE OF THE AREA
EARLY IN THE MORNING... AND MOVE EASTWARD AS THE DAY PROGRESSES.
PRECIPITATION IS EXPECTED TO MOVE OUT OF THE AREA BY WEDNESDAY
AFTERNOON.

WWW.SRH.NOAA.GOV/TULSA CONTAINS ADDITIONAL INFORMATION.

In the hours before

Special weather statement, Oct 12, 2:34 AM CDT, 1 hour 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
234 AM CDT WED OCT 12 2011

OKZ054-059-120800-
OSAGE OK-PAWNEE OK-
234 AM CDT WED OCT 12 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 300 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     OSAGE AND PAWNEE

AT 233 AM CDT...A CLUSTER OF RAIN SHOWERS WAS CENTERED OVER SOUTHERN
OSAGE AND NORTHERN PAWNEE COUNTIES...MOVING EAST AT 30 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...SHIDLER...
CLEVELAND...OSAGE...FORAKER...HOMINY...WESTPORT...WALNUT CREEK STATE
PARK...OSAGE HILLS STATE PARK...SKIATOOK...HULAH...BIGHEART...
PEARSONIA...OKESA...BARNSDALL...WYNONA...AVANT AND PAWHUSKA.

THIS CLUSTER OF SHOWERS HAS HAD A HISTORY OF PRODUCING 40 TO 45 MPH
WINDS.

LAT...LON 3694 9600 3621 9601 3619 9677 3674 9692
      3675 9689 3675 9683 3677 9682 3677 9680
      3679 9678 3679 9676 3685 9676
TIME...MOT...LOC 0733Z 258DEG 25KT 3657 9665

LACY

Special weather statement, Oct 12, 2:47 AM CDT, 1 hour 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
247 AM CDT WED OCT 12 2011

OKZ062-063-068-120815-
CHEROKEE OK-DELAWARE OK-MAYES OK-
247 AM CDT WED OCT 12 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 315 AM CDT
FOR THE FOLLOWING COUNTIES...

IN EAST CENTRAL OKLAHOMA
     NORTHERN CHEROKEE

IN NORTHEAST OKLAHOMA
     SOUTHWESTERN DELAWARE AND EASTERN MAYES

AT 247 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 2 MILES SOUTH OF
LOCUST GROVE...MOVING NORTHEAST AT 20 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...LOCUST
GROVE AND ROSE.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH.

LAT...LON 3643 9501 3627 9482 3610 9514 3619 9526
TIME...MOT...LOC 0747Z 228DEG 19KT 3617 9516

LACY

Special weather statement, Oct 12, 2:59 AM CDT, 54 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
259 AM CDT WED OCT 12 2011

OKZ063-068-120830-
CHEROKEE OK-DELAWARE OK-
259 AM CDT WED OCT 12 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 330 AM CDT
FOR THE FOLLOWING COUNTIES...

IN EAST CENTRAL OKLAHOMA
     NORTHERN CHEROKEE

IN NORTHEAST OKLAHOMA
     SOUTHERN DELAWARE

AT 259 AM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER PEGGS...MOVING
EAST AT 30 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...LEACH...
SCRAPER...OAKS...TWIN OAKS...KANSAS AND COLCORD.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH.

LAT...LON 3616 9464 3616 9480 3607 9480 3600 9514
      3607 9517 3608 9512 3616 9512 3616 9501
      3623 9501 3633 9471
TIME...MOT...LOC 0759Z 252DEG 28KT 3611 9507

LACY

Special weather statement, Oct 12, 3:10 AM CDT, 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
310 AM CDT WED OCT 12 2011

OKZ068-069-120845-
ADAIR OK-CHEROKEE OK-
310 AM CDT WED OCT 12 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 345 AM CDT
FOR THE FOLLOWING COUNTIES...

IN EAST CENTRAL OKLAHOMA
     EASTERN CHEROKEE

IN NORTHEAST OKLAHOMA
     NORTHWESTERN ADAIR

AT 310 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 6 MILES SOUTHWEST
OF ELDON...MOVING NORTHEAST AT 30 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ELDON...
PROCTOR AND CHRISTIE.

THIS STORM WILL BE CAPABLE OF PRODUCING PEA TO PENNY SIZE HAIL AND
WIND GUSTS TO 40 MPH.

LAT...LON 3615 9472 3590 9461 3578 9488 3587 9500
TIME...MOT...LOC 0810Z 227DEG 24KT 3588 9487

LACY

Special weather statement, Oct 12, 3:17 AM CDT, 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
317 AM CDT WED OCT 12 2011

ARZ001-OKZ063-120845-
BENTON AR-DELAWARE OK-
317 AM CDT WED OCT 12 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 345 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     WESTERN BENTON

IN NORTHEAST OKLAHOMA
     SOUTHEASTERN DELAWARE

AT 317 AM CDT...A CLUSTER OF STRONG THUNDERSTORMS WAS CENTERED 3
MILES NORTHEAST OF KANSAS...MOVING EAST AT 30 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...COLCORD...
WEST SILOAM SPRINGS...SILOAM SPRINGS...GENTRY AND DECATUR.

THIS CLUSTER OF STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50
MPH.

LAT...LON 3639 9441 3617 9443 3616 9486 3634 9488
TIME...MOT...LOC 0817Z 265DEG 28KT 3624 9473

LACY

Special weather statement, Oct 12, 3:53 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
353 AM CDT WED OCT 12 2011

ARZ001-010-120930-
BENTON AR-WASHINGTON AR-
353 AM CDT WED OCT 12 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 430 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     WESTERN BENTON AND NORTHERN WASHINGTON

AT 353 AM CDT...THE CENTER OF A CLUSTER OF STRONG THUNDERSTORMS WAS
LOCATED OVER FAIRMOUNT...MOVING EAST AT 20 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
SPRINGTOWN...HIGHFILL...TONTITOWN...CAVE SPRINGS...SPRINGDALE...
LOWELL...ROGERS AND BENTONVILLE.

THESE STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH.

LAT...LON 3614 9410 3611 9455 3634 9457 3646 9408
TIME...MOT...LOC 0853Z 265DEG 18KT 3623 9443

LACY

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 12, 2:25 AM CDT	Special Weather Statement	TSA	Mayes	35 min
Oct 12, 2:34 AM CDT	Special Weather Statement	TSA	Osage, Pawnee	26 min
Oct 12, 2:47 AM CDT	Special Weather Statement	TSA	Mayes	28 min
Oct 12, 2:59 AM CDT	Special Weather Statement	TSA	Delaware	31 min
Oct 12, 3:10 AM CDT	Special Weather Statement	TSA	Adair	35 min
Oct 12, 3:17 AM CDT	Special Weather Statement	TSA	Delaware	28 min
Oct 12, 12:15 AM CDT	Special Weather Statement	TSA	Madison	30 min
Oct 12, 6:20 PM CDT	Special Weather Statement	TSA	Carroll	25 min
Oct 12, 6:51 PM CDT	Special Weather Statement	TSA	Carroll	24 min
Oct 12, 6:53 PM CDT	Special Weather Statement	TSA	Benton	37 min

Nearby

Special Weather Statements in Arkansas, 2011 Every special weather statement in 2011

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.