Alert archive / Arkansas / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

October 11, 2011Benton County, Arkansas

NWS Tulsa, OK issued this special weather statement at Oct 11, 2011, 4:44 PM CDT for Benton County, Arkansas. 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: Oct 11, 2011, 4:44 PM CDT (21:44 UTC)
Expired: Oct 11, 2011, 5:30 PM CDT
In force: 46 min
Issued by: NWS Tulsa, OK

County Benton County, AR

The radar

The Western Arkansas radar (KSRX), 110 km from the middle of the area, began a volume at 21:45 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 12:00Z, 9.7 hours before the alert went out and 78 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: 644 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 755 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 96 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

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 Tulsa, OK wrote its last area forecast discussion before this special weather statement went out at Oct 11, 3:29 PM CDT, 1 hour 15 minutes earlier.

Area forecast discussion, Oct 11, 3:29 PM CDT, 1 hour 15 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
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   58  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.
&&

SHORT TERM...06
LONG TERM....14

Hazardous weather outlook, Oct 11, 11:16 AM CDT, 5 hours 28 minutes before

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In the hours before

Special weather statement, Oct 11, 3:04 PM CDT, 1 hour 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
304 PM CDT TUE OCT 11 2011

OKZ072-076-112030-
LE FLORE OK-SEQUOYAH OK-
304 PM CDT TUE OCT 11 2011

...SIGNIFICANT WEATHER ADVISORY...

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

IN SOUTHEAST OKLAHOMA
     NORTHEASTERN LE FLORE

IN EAST CENTRAL OKLAHOMA
     EASTERN SEQUOYAH

AT 304 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER GANS...MOVING
NORTHEAST AT 25 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...GANS...
MULDROW...ROLAND...ARKOMA AND SHORT.

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

LAT...LON 3563 9448 3534 9444 3525 9473 3541 9485
TIME...MOT...LOC 2004Z 239DEG 23KT 3537 9470

Special weather statement, Oct 11, 3:26 PM CDT, 1 hour 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
326 PM CDT TUE OCT 11 2011

ARZ019-029-OKZ072-076-112100-
CRAWFORD AR-LE FLORE OK-SEBASTIAN AR-SEQUOYAH OK-
326 PM CDT TUE OCT 11 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 400 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     SOUTHWESTERN CRAWFORD

IN WEST CENTRAL ARKANSAS
     NORTHWESTERN SEBASTIAN

IN SOUTHEAST OKLAHOMA
     NORTHEASTERN LE FLORE

IN EAST CENTRAL OKLAHOMA
     EASTERN SEQUOYAH

AT 326 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 3 MILES WEST OF
MOFFETT...MOVING EAST AT 25 MPH.

SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...ARKOMA...
MOFFETT...SHORT...FORT SMITH...VAN BUREN...FIGURE FIVE...CEDARVILLE
AND NATURAL DAM.

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

LAT...LON 3569 9439 3537 9417 3528 9458 3547 9470
TIME...MOT...LOC 2026Z 248DEG 21KT 3538 9449

Special weather statement, Oct 11, 4:44 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
444 PM CDT TUE OCT 11 2011

ARZ001-010-112230-
BENTON AR-WASHINGTON AR-
444 PM CDT TUE OCT 11 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 530 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     CENTRAL BENTON AND NORTHERN WASHINGTON

AT 444 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 2 MILES SOUTH OF
TONTITOWN...MOVING NORTHEAST AT 20 MPH.

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

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

LAT...LON 3639 9423 3632 9395 3610 9420 3612 9427
TIME...MOT...LOC 2144Z 204DEG 16KT 3617 9421

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 3:04 PM CDT	Special Weather Statement	TSA	Sequoyah	26 min
Oct 11, 3:26 PM CDT	Special Weather Statement	TSA	Crawford	34 min
Oct 11, 5:31 PM CDT	Special Weather Statement	TSA	Franklin	44 min
Oct 11, 6:00 PM CDT	Special Weather Statement	TSA	Carroll	45 min
Oct 11, 6:07 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	53 min
Oct 11, 6:57 PM CDT	Severe Thunderstorm Warning	TSA	Carroll	33 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.