Alert archive / Oklahoma / Special Weather Statements in 2012

Special Weather Statement, NWS Tulsa, OK

July 12, 2012LeFlore County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Jul 12, 2012, 8:16 PM CDT for LeFlore County, Oklahoma. It was in force for 59 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
Jul 12, 2012, 8:16 PM CDT (01:16 UTC)
Expired
Jul 12, 2012, 9:15 PM CDT
In force
59 min
Issued by
NWS Tulsa, OK

County LeFlore County, OK

The radar

The Western Arkansas radar (KSRX), 58 km from the middle of the area, began a volume at 01:17 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

Shreveport, LA (KSHV), launched 00:00Z, 1.3 hours before the alert went out and 278 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2012-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 823 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2012-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
823 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
725 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
55 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.

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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 Jul 12, 3:30 PM CDT, 4 hours 46 minutes earlier.

Area forecast discussion, Jul 12, 3:30 PM CDT, 4 hours 46 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
330 PM CDT THU JUL 12 2012

.DISCUSSION...
A FEW POP UP SHOWERS OVER THE TERRAIN OF SOUTHEAST OK ARE ABOUT
ALL WE CAN MUSTER THIS AFTERNOON...AND THIS SHOULD BE GONE PRIOR
TO 00Z. ANOTHER WEAK DISTURBANCE IN NNW FLOW ALOFT CAN BE SEEN IN
WATER VAPOR AND HAS SPARKED A FEW THUNDERSTORMS ACROSS NE KANSAS.
THIS WILL NEED TO BE MONITORED THIS EVENING FOR POSSIBLE ISOLATED
DEVELOPMENT OVER FAR NE OKLAHOMA AND NW ARKANSAS...RIGHT NOW WILL
KEEP A DRY FORECAST FOR THE EVENING PERIOD.

OTHER THAN THAT NO MAJOR CHANGES ANTICIPATED THROUGH THE NEXT
SEVERAL DAYS WITH ANY PRECIP CHANCES TIED MAINLY TO TERRAIN
INFLUENCES AND ANY SHORTWAVE ENERGY THAT DROPS SOUTH ALONG THE
EASTERN SIDE OF THE UPPER RIDGE. WEAK UPPER TROUGH WILL GRADUALLY
PUSH WEST ACROSS TEXAS THIS WEEKEND AND SHOULD OFFER A BIT BETTER
CHANCES OF SHOWERS AND THUNDERSTORMS IN SOUTHEAST AREAS THIS
WEEKEND.

OTHERWISE...SUMMER DRONES ON. TEMPS LIKELY TO INCH UP
NEXT WEEK WITH AFTERNOON HEAT INDICES IN MANY AREAS NEAR OR A
LITTLE ABOVE 105...HOWEVER OUTSIDE OF URBAN LOCATIONS THE
OVERNIGHT TEMPS SHOULD REMAIN BELOW THE 75 DEGREE THRESHOLD FOR
HEAT ADVISORIES. MAV/MEX NUMBERS REMAIN SIGNIFICANTLY TOO COOL.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   75 100  75 101 /  10  10  10  10
FSM   75  98  75  98 /  10  10  10  20
MLC   70  97  70  98 /  10  10  10  10
BVO   65  99  65 101 /  10  10  10  10
FYV   65  96  65  96 /  10  10  10  20
BYV   68  96  68  95 /  10  10  10  20
MKO   71  99  71 100 /  10  10  10  10
MIO   69  98  69  99 /  10  10  10  10
F10   69 100  69 101 /  10  10  10  10
HHW   71  95  71  96 /  10  10  10  20

&&

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

SHORT TERM...14
LONG TERM....23
Hazardous weather outlook, Jul 12, 5:03 PM CDT, 3 hours 13 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
503 PM CDT THU JUL 12 2012

ARZ001-002-010-011-019-020-029-OKZ049-053>076-131000-
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-
503 PM CDT THU JUL 12 2012

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

.DAY ONE...THROUGH TONIGHT.

THUNDERSTORMS WITH DANGEROUS LIGHTNING.
        RISK...LIMITED.
        AREA...SOUTHEAST OKLAHOMA.
        ONSET...ONGOING INTO EARLY EVENING.

DANGEROUS HEAT.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
        ONSET...ONGOING INTO THE EARLY EVENING.

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

DISCUSSION...
ISOLATED THUNDERSTORMS CONTINUE TO DEVELOP ACROSS PARTS OF FAR
SOUTHEAST OKLAHOMA WITHIN THE PERIOD OF PEAK HEATING...AND WILL
CONTINUE INTO THE EARLY EVENING HOURS. SEVERE WEATHER IS NOT
ANTICIPATED...HOWEVER...DECAYING STORMS MAY PRODUCE BRIEF WIND GUSTS
BETWEEN 40 AND 50 MPH.

A LIMITED FIRE DANGER WILL ALSO CONTINUE INTO THE EVENING...BUT
WILL BE MITIGATED DURING THE OVERNIGHT HOURS BY INCREASED RELATIVE
HUMIDITY VALUES.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
SPOTTER ACTIVATION NOT EXPECTED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.
FRIDAY...NO HAZARDS.
SATURDAY THROUGH MONDAY...THUNDERSTORM POTENTIAL...DANGEROUS HEAT POTENTIAL.
TUESDAY AND WEDNESDAY...DANGEROUS HEAT POTENTIAL.

EXTENDED DISCUSSION...
ISOLATED THUNDERSTORMS WILL REMAIN POSSIBLE IN THE HIGHER TERRAIN
AREAS OF SOUTHEAST OKLAHOMA AND NORTHWEST ARKANSAS OVER THE
WEEKEND AND INTO EARLY NEXT WEEK...AS AN UPPER LEVEL DISTURBANCE
LINGERS OVER THE LOWER MISSISSIPPI VALLEY. OTHERWISE...HOT
CONDITIONS ARE EXPECTED TO PREVAIL AS AN UPPER LEVEL RIDGE BUILDS
INTO THE PLAINS FROM THE WEST. FIRE WEATHER CONCERNS WILL REMAIN ONGOING AS
THE VEGETATION CONTINUES TO DRY OUT AND EXPECTED AREAL COVERAGE
OF RAINFALL REMAINS LOW.

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

In the hours before

Special weather statement, Jul 12, 5:06 PM CDT, 3 hours 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
506 PM CDT THU JUL 12 2012

OKZ049-053-122300-
CHOCTAW OK-PUSHMATAHA OK-
506 PM CDT THU JUL 12 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 600 PM CDT
FOR THE FOLLOWING COUNTIES...

IN SOUTHEAST OKLAHOMA
     NORTHERN CHOCTAW AND SOUTHWESTERN PUSHMATAHA

AT 506 PM CDT...STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM MOYERS TO 3 MILES SOUTH OF DELA...MOVING WEST AT 10
MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY THESE STORMS INCLUDE...
KENT...SPEER...ANTLERS...DELA...MOYERS...KOSOMA AND KELLOND.

THESE STORMS 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 3416 9586 3417 9578 3440 9579 3440 9559
      3414 9539 3405 9582
TIME...MOT...LOC 2206Z 071DEG 7KT 3434 9565 3416 9552
Special weather statement, Jul 12, 6:29 PM CDT, 1 hour 47 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
629 PM CDT THU JUL 12 2012

ARZ029-OKZ076-130030-
LE FLORE OK-SEBASTIAN AR-
629 PM CDT THU JUL 12 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 730 PM CDT
FOR THE FOLLOWING COUNTIES...

IN WEST CENTRAL ARKANSAS
     WESTERN SEBASTIAN

IN SOUTHEAST OKLAHOMA
     NORTHEASTERN LE FLORE

AT 630 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER JENNY LIND...
MOVING SOUTHWEST AT 10 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY
THIS STORM INCLUDE...ROCK ISLAND...HACKETT...JENSON...BONANZA...JENNY
LIND AND RYE HILL.

THIS STORM WILL BE CAPABLE OF PRODUCING DIME SIZE HAIL AND WIND
GUSTS TO 40 MPH. RESIDENTS IN THESE AREAS SHOULD REMAIN ALERT IN CASE
THE SIGNIFICANT WEATHER ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3509 9448 3519 9455 3530 9433 3524 9426
TIME...MOT...LOC 2330Z 060DEG 10KT 3524 9432
Special weather statement, Jul 12, 7:17 PM CDT, 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
717 PM CDT THU JUL 12 2012

OKZ072-130115-
SEQUOYAH OK-
717 PM CDT THU JUL 12 2012

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 815 PM CDT
FOR THE FOLLOWING COUNTY...

IN EAST CENTRAL OKLAHOMA
     EASTERN SEQUOYAH

AT 717 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 7 MILES NORTH OF
MULDROW...MOVING SOUTHWEST AT 10 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THIS STORM INCLUDE...SALLISAW...GANS...MULDROW...MC KEY
AND BRUSHY.

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

LAT...LON 3535 9475 3535 9477 3534 9479 3533 9481
      3549 9490 3562 9455 3546 9446
TIME...MOT...LOC 0017Z 065DEG 10KT 3550 9461
Special weather statement, Jul 12, 8:16 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:17 PM CDTSpecial Weather StatementTSASequoyah58 min
Jul 12, 9:13 PM CDTSpecial Weather StatementTSALeFlore62 min
Jul 12, 9:54 PM CDTSpecial Weather StatementTSAPushmataha66 min
Jul 13, 3:46 PM CDTSpecial Weather StatementTSANowata29 min
Jul 13, 3:59 PM CDTSpecial Weather StatementTSAWashington31 min
Jul 13, 4:14 PM CDTSpecial Weather StatementTSAWashington61 min
Jul 13, 4:38 PM CDTSpecial Weather StatementTSAMayes, Rogers37 min
Jul 13, 5:00 PM CDTSpecial Weather StatementTSAOsage45 min
Jul 13, 5:07 PM CDTSpecial Weather StatementTSAMayes38 min
Jul 13, 5:35 PM CDTSpecial Weather StatementTSATulsa40 min
Jul 13, 5:39 PM CDTSevere Thunderstorm WarningTSACreek, Tulsa36 min
Jul 13, 5:50 PM CDTSpecial Weather StatementTSAPawnee25 min
Jul 13, 5:57 PM CDTSpecial Weather StatementTSAMuskogee33 min
Jul 13, 6:16 PM CDTSpecial Weather StatementTSAMcIntosh, Muskogee44 min
Jul 13, 6:17 PM CDTSpecial Weather StatementTSACreek28 min
Jul 13, 6:49 PM CDTSpecial Weather StatementTSAMcIntosh, Muskogee56 min
Jul 13, 6:50 PM CDTSpecial Weather StatementTSAOkfuskee55 min

Nearby

Special Weather Statements in Oklahoma, 2012Every 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.