Alert archive / Arkansas / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

August 4, 2011Franklin County, Sebastian County, Arkansas

NWS Tulsa, OK issued this special weather statement at Aug 4, 2011, 4:45 AM CDT for Franklin County, Sebastian County, Arkansas. It was in force for 30 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 4, 2011, 4:45 AM CDT (09:45 UTC)
Expired: Aug 4, 2011, 5:15 AM CDT
In force: 30 min
Issued by: NWS Tulsa, OK

Counties Franklin County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 59 km from the middle of the area, began a volume at 09:47 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, 9.8 hours before the alert went out and 141 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: 3561 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 2210 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

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

201 
WWUS84 KTSA 040945
SPSTSA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
445 AM CDT THU AUG 4 2011

ARZ011-019-020-029-OKZ076-041015-
CRAWFORD AR-FRANKLIN AR-LE FLORE OK-MADISON AR-SEBASTIAN AR-
445 AM CDT THU AUG 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 515 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     SOUTHEASTERN CRAWFORD AND SOUTHERN MADISON

IN WEST CENTRAL ARKANSAS
     FRANKLIN AND NORTHERN SEBASTIAN

IN SOUTHEAST OKLAHOMA
     NORTHEASTERN LE FLORE

AT 444 AM CDT...STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM NEAR FORT SMITH TO CASS TO SAINT PAUL ARKANSAS. THE 
STORMS WERE MOVING EAST AT 10 MPH.

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

LAT...LON 3576 9361 3576 9369 3565 9369 3539 9392
      3517 9426 3527 9455 3567 9401 3596 9380
      3591 9350
TIME...MOT...LOC 0944Z 281DEG 6KT 3587 9375 3565 9390
          3542 9420 3529 9445

$$

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 Aug 4, 3:35 AM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Aug 4, 3:35 AM CDT, 1 hour 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
335 AM CDT THU AUG 4 2011

.DISCUSSION...
ONGOING MCS WHICH SKIRTED ACROSS FAR NE OKLAHOMA OVERNIGHT HAS
PUSHED AN EXTENSIVE OUTFLOW JUST SOUTH OF THE INTERSTATE 44
CORRIDOR...AND THIS BOUNDARY MAY MAKE IT A BIT FURTHER SOUTH
THROUGH THE EARLY MORNING HOURS. MODELS HAVE ALL CAPTURED THE MID
LEVEL WAVE NOTED IN PROFILER DATA CURRENTLY EXTENDING THROUGH
CENTRAL KANSAS...WITH THIS WAVE LIKELY ENHANCED BY THE THE
EXTENSIVE OVERNIGHT CONVECTION. THIS WAVE WILL CONTINUE EASTWARD
TODAY WITH SUBSIDENCE EXPECTED IN ITS WAKE...AND WITH DEEP MIXING
DEVELOPING TO OUR SOUTHWEST...THE AFOREMENTIONED OUTFLOW IS LIKELY
TO MIX NORTHWARD WITH EXCESSIVE TEMPS ONCE AGAIN ALONG AND SOUTH
OF THE BOUNDARY. CONDITIONS NORTH OF THE BOUNDARY WILL BE JUST AS
OPPRESSIVE GIVEN POOLING DEWPOINTS AND RESULTANT IMPACTS ON HEAT
INDEX READINGS. REGARDING ADDITIONAL AFTERNOON STORMS...THE
BOUNDARY WILL AGAIN SERVE AS A FOCUS BUT CONFIDENCE REMAINS LOW ON
EVENTUAL COVERAGE. SO...WHEN IN A DROUGHT FORECAST A DROUGHT.

THE BOUNDARY WILL REMAIN NEAR THE NORTHERN PORTIONS OF THE AREA
THROUGH THE WEEKEND WITH EXTENT OF CONVECTION DETERMINING THE
DEGREE OF ANY SOUTHWARD SURGE. GIVEN THE EXISTING AIRMASS WILL
CONTINUE WITH RECORD TO NEAR RECORD TEMPERATURES THROUGH THE
WEEKEND INTO EARLY NEXT WEEK. THESE CONDITIONS WILL CONTINUE TO
SUPPORT A RISK OF AGGRESSIVE WILDFIRES ESPECIALLY SHOULD LOCALLY
HIGHER WIND SPEEDS DEVELOP ON ANY ONE DAY. FURTHER INTO THE
EXTENDED...WE WILL WAIT WITH BATED BREATH FOR A POTENTIAL MID WEEK
COLD FRONT WHICH THE 00Z SUITE OF MODELS DOES CURRENTLY AGREE
UPON.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL  110  84 107  84 /  20  20  20  10
FSM  115  83 109  83 /  10  10  20  10
MLC  113  81 112  81 /  10  10  10  10
BVO  105  77 105  76 /  20  20  20  20
FYV  110  77 103  78 /  20  20  20  10
BYV  106  78 102  76 /  30  20  20  10
MKO  112  81 109  80 /  10  10  20  10
MIO  102  78 102  76 /  30  20  20  20
F10  112  81 112  82 /  10  10  10  10
HHW  112  81 111  81 /   0  10   0  10

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...EXCESSIVE HEAT WARNING UNTIL 7 PM SATURDAY FOR OKZ049-OKZ053-
     OKZ054-OKZ055-OKZ056-OKZ057-OKZ058-OKZ059-OKZ060-OKZ061-
     OKZ062-OKZ063-OKZ064-OKZ065-OKZ066-OKZ067-OKZ068-OKZ069-
     OKZ070-OKZ071-OKZ072-OKZ073-OKZ074-OKZ075-OKZ076.

     EXCESSIVE HEAT WATCH FROM 7 PM SATURDAY TO 9 PM MONDAY FOR
     OKZ049-OKZ053-OKZ054-OKZ055-OKZ056-OKZ057-OKZ058-OKZ059-
     OKZ060-OKZ061-OKZ062-OKZ063-OKZ064-OKZ065-OKZ066-OKZ067-
     OKZ068-OKZ069-OKZ070-OKZ071-OKZ072-OKZ073-OKZ074-OKZ075-
     OKZ076.

AR...EXCESSIVE HEAT WARNING UNTIL 7 PM SATURDAY FOR ARZ001-ARZ002-
     ARZ010-ARZ011-ARZ019-ARZ020-ARZ029.

     EXCESSIVE HEAT WATCH FROM 7 PM SATURDAY TO 9 PM MONDAY FOR
     ARZ001-ARZ002-ARZ010-ARZ011-ARZ019-ARZ020-ARZ029.

&&

LONG TERM....07

Hazardous weather outlook, Aug 3, 9:41 PM CDT, 7 hours 4 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
941 PM CDT WED AUG 3 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-041445-
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-
941 PM CDT WED AUG 3 2011

...CHANCES FOR SHOWERS AND THUNDERSTORMS OVERNIGHT TONIGHT...

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

.DAY ONE...TONIGHT.

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

DANGEROUS HEAT.
RISK...LIMITED.
AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ONGOING.

FIRE WEATHER DANGER.
RISK...LIMITED.
AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
ONSET...ONGOING.

DISCUSSION...
A WEAK FRONTAL BOUNDARY REMAINED OVER NORTHEAST OKLAHOMA
AND NORTHWEST ARKANSAS THIS EVENING. CHANCES FOR SCATTERED
SHOWERS AND THUNDERSTORMS WILL REMAIN POSSIBLE OVERNIGHT...WITH
THE HIGHER CHANCES NORTH OF THE BOUNDARY. SOME OF THESE
THUNDERSTORMS WILL BE CAPABLE OF BECOMING STRONG TO SEVERE WITH
DAMAGING WINDS AND LARGE HAIL BEING THE MAIN THREATS.

HOT TEMPERATURES WITH HEAT INDEX VALUES IN THE MID TO UPPER 90S
NORTH OF THE BOUNDARY TO 100 TO AROUND 108 DEGREES SOUTH OF THE
BOUNDARY CONTINUED THIS EVENING. TEMPERATURES OVERNIGHT WILL
CONTINUE TO BE SLOW FALL AS LOWS ARE EXPECTED TO STAY IN THE MID 70S
TO LOW 80S...PROVIDING LITTLE TO NO RELIEF FROM THE HEAT.

A LIMITED FIRE WEATHER DANGER ALSO REMAINS OVER THE REGION THIS
EVENING...MAINLY SOUTH OF THE FRONTAL BOUNDARY AS SOUTHERLY WINDS
AND RELATIVE HUMIDITY VALUES IN UPPER 20S TO UPPER 30S WERE
COMMON. THIS LIMITED FIRE DANGER WILL CONTINUE INTO THE OVERNIGHT
HOURS BEFORE RELATIVE HUMIDITY VALUES RECOVER ENOUGH.

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

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
THURSDAY AND FRIDAY...THUNDERSTORM POTENTIAL...DANGEROUS HEAT POTENTIAL.
SATURDAY...THUNDERSTORM POTENTIAL...VERY HIGH FIRE WEATHER POTENTIAL...DANGEROUS HEAT POTENTIAL.
SUNDAY...THUNDERSTORM POTENTIAL...DANGEROUS HEAT POTENTIAL.
MONDAY...THUNDERSTORM POTENTIAL...VERY HIGH FIRE WEATHER POTENTIAL...DANGEROUS HEAT POTENTIAL.
TUESDAY...THUNDERSTORM POTENTIAL...VERY HIGH FIRE WEATHER POTENTIAL...DANGEROUS HEAT POTENTIAL.

EXTENDED DISCUSSION...
THE UPPER RIDGE IS EXPECTED TO SHIFT WESTWARD THIS WEEKEND...ALLOWING
FOR CONTINUED THUNDERSTORM CHANCES MAINLY ACROSS NORTHEAST
OKLAHOMA AND NORTHWEST ARKANSAS. THE RIDGE LOOKS TO FLATTEN OUT
SOME WITH A FRONTAL BOUNDARY POSSIBLY PUSHING INTO THE REGION
DURING THE FIRST HALF OF NEXT WEEK. THIS WILL ALLOW FOR CONTINUED
CHANCES FOR SHOWERS AND THUNDERSTORMS.

AFTERNOON HEAT INDICES WILL CONTINUE TO BE IN THE 105 TO 115 RANGE
THROUGH THE END OF THE WEEK...WITH A SLIGHT DOWNWARD TREND INTO
THE 105 TO 110 RANGE BY LATE IN THE WEEKEND AND EARLY NEXT WEEK.
THE EXCESSIVE HEAT WARNINGS HAVE BEEN EXTENDED THROUGH SATURDAY
FOR THE REGION.

ONGOING SEVERE TO EXTREME DROUGHT CONDITIONS AND VERY HOT
TEMPERATURES WILL CONTINUE TO YIELD ELEVATED FIRE DANGER ACROSS
MUCH OF THE AREA UNTIL SUBSTANTIAL RAINFALL OCCURS.

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

In the hours before

Special weather statement, Aug 4, 12:32 AM CDT, 4 hours 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1232 AM CDT THU AUG 4 2011

OKZ054>056-040600-
NOWATA OK-OSAGE OK-WASHINGTON OK-
1232 AM CDT THU AUG 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 100 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     NORTHWESTERN NOWATA...NORTHEASTERN OSAGE AND WASHINGTON

AT 1232 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES NORTHWEST
OF DEWEY...MOVING NORTHEAST AT 20 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...WANN...HULAH...BARTLESVILLE...DEWEY
AND COPAN.

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

LAT...LON 3694 9564 3673 9597 3685 9612 3701 9595
      3701 9572
TIME...MOT...LOC 0532Z 226DEG 16KT 3685 9596

Special weather statement, Aug 4, 12:56 AM CDT, 3 hours 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1256 AM CDT THU AUG 4 2011

OKZ055-056-040630-
NOWATA OK-WASHINGTON OK-
1256 AM CDT THU AUG 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 130 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     NORTHWESTERN NOWATA AND WASHINGTON

AT 1257 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 3 MILES EAST OF
COPAN...MOVING NORTH AT 20 MPH. SOME LOCATIONS THAT WILL BE AFFECTED
BY THIS STORM INCLUDE...WANN AND COPAN.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT
WEATHER ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3700 9567 3681 9580 3684 9594 3700 9598
TIME...MOT...LOC 0557Z 186DEG 18KT 3690 9587

Special weather statement, Aug 4, 1:36 AM CDT, 3 hours 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
136 AM CDT THU AUG 4 2011

OKZ056-057-040700-
CRAIG OK-NOWATA OK-
136 AM CDT THU AUG 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 200 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     NORTHWESTERN CRAIG AND NORTHEASTERN NOWATA

AT 137 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 6 MILES EAST OF
SOUTH COFFEYVILLE...MOVING NORTH AT 10 MPH. SOME LOCATIONS THAT WILL
BE AFFECTED BY THIS STORM INCLUDE...SOUTH COFFEYVILLE.

THIS STORM WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH.
RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT
WEATHER ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3685 9544 3692 9565 3701 9562 3701 9536
      3700 9536
TIME...MOT...LOC 0637Z 201DEG 10KT 3697 9551

Special weather statement, Aug 4, 1:53 AM CDT, 2 hours 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
153 AM CDT THU AUG 4 2011

OKZ056-057-040730-
CRAIG OK-NOWATA OK-
153 AM CDT THU AUG 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 230 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHEAST OKLAHOMA
     NORTHWESTERN CRAIG AND NORTHEASTERN NOWATA

AT 154 AM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER EXTREME
NORTHEASTERN NOWATA COUNTY...MOVING NORTH AT 30 MPH..

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

LAT...LON 3690 9537 3692 9551 3700 9551 3701 9532
      3700 9531
TIME...MOT...LOC 0654Z 191DEG 27KT 3699 9542

Special weather statement, Aug 4, 4:45 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
445 AM CDT THU AUG 4 2011

ARZ011-019-020-029-OKZ076-041015-
CRAWFORD AR-FRANKLIN AR-LE FLORE OK-MADISON AR-SEBASTIAN AR-
445 AM CDT THU AUG 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 515 AM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     SOUTHEASTERN CRAWFORD AND SOUTHERN MADISON

IN WEST CENTRAL ARKANSAS
     FRANKLIN AND NORTHERN SEBASTIAN

IN SOUTHEAST OKLAHOMA
     NORTHEASTERN LE FLORE

AT 444 AM CDT...STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR FORT SMITH TO CASS TO SAINT PAUL ARKANSAS. THE
STORMS WERE MOVING EAST AT 10 MPH.

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

LAT...LON 3576 9361 3576 9369 3565 9369 3539 9392
      3517 9426 3527 9455 3567 9401 3596 9380
      3591 9350
TIME...MOT...LOC 0944Z 281DEG 6KT 3587 9375 3565 9390
          3542 9420 3529 9445

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 3, 7:03 PM CDT	Special Weather Statement	TSA	Washington	27 min
Aug 3, 7:07 PM CDT	Special Weather Statement	TSA	Pushmataha	23 min
Aug 3, 7:42 PM CDT	Special Weather Statement	TSA	Haskell	33 min
Aug 3, 9:25 PM CDT	Special Weather Statement	TSA	McIntosh	35 min
Aug 4, 12:32 AM CDT	Special Weather Statement	TSA	Washington	28 min
Aug 4, 12:56 AM CDT	Special Weather Statement	TSA	Nowata	34 min
Aug 4, 1:36 AM CDT	Special Weather Statement	TSA	Nowata	24 min
Aug 4, 1:40 AM CDT	Severe Thunderstorm Warning	TSA	Nowata	12 min
Aug 4, 1:53 AM CDT	Special Weather Statement	TSA	Nowata	37 min
Aug 4, 5:08 PM CDT	Special Weather Statement	TSA	LeFlore	22 min
Aug 4, 5:13 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	32 min
Aug 4, 5:45 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	30 min
Aug 4, 6:07 PM CDT	Special Weather Statement	TSA	LeFlore	38 min
Aug 4, 6:49 PM CDT	Special Weather Statement	TSA	Latimer	26 min
Aug 4, 6:59 PM CDT	Severe Thunderstorm Warning	TSA	Latimer	36 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.