Alert archive / Oklahoma / Excessive Heat Watches in 2011

Excessive Heat Watch 2, NWS Tulsa, OK

July 13, 201121 counties in Oklahoma

NWS Tulsa, OK issued this excessive heat watch at Jul 13, 2011, 3:59 PM CDT for 21 counties in Oklahoma. It took effect at Jul 17, 2011, 9:00 PM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
Jul 13, 2011, 3:59 PM CDT (20:59 UTC)
In effect from
Jul 17, 2011, 9:00 PM CDT
Expired
Jul 16, 2011, 3:45 AM CDT
In force
Issued by
NWS Tulsa, OK
All 21 counties

Cherokee County, OK, Choctaw County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pawnee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 41 km from the middle of the area, began a volume at 20:59 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, 9.0 hours before the alert went out and 178 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, Norman, OK at 12:00Z on 2011-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1440 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, Norman, OK at 12:00Z on 2011-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 82 square meters per square second.1939Sfc1 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
1440 J/kg
Mixed-layer CIN
-158 J/kg
Mixed-layer LCL
1656 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
82 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this excessive heat watch 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 excessive heat watch went out at Jul 13, 3:10 PM CDT, 49 minutes earlier.

Area forecast discussion, Jul 13, 3:10 PM CDT, 49 minutes before
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Hazardous weather outlook, Jul 13, 12:45 PM CDT, 3 hours 14 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
1245 PM CDT WED JUL 13 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-141000-
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-
1245 PM CDT WED JUL 13 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

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

DANGEROUS HEAT.
	RISK...ELEVATED.
	AREA...SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS.
	ONSET...ONGOING.

DISCUSSION...
SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS AFTERNOON ACROSS
PARTS OF NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS. ADDITIONAL
THUNDERSTORM DEVELOPMENT IS EXPECTED AS WELL. WIDESPREAD SEVERE
WEATHER IS NOT ANTICIPATED...BUT A FEW STORMS MAY PRODUCE DAMAGING
WIND GUSTS AND BRIEF HEAVY RAINFALL.

OUTSIDE OF THE RAIN AREAS...IN SOUTHEAST OKLAHOMA AND WEST CENTRAL
ARKANSAS...HOT AND HUMID CONDITIONS WILL CONTINUE THIS AFTERNOON
AND INTO THE EVENING. AFTERNOON HEAT INDEX VALUES WILL REACH THE
105 TO 110 RANGE ACROSS MUCH OF THAT AREA. EXCESSIVE HEAT WARNINGS
AND HEAT ADVISORIES /OKCNPWTSA/ REMAIN IN EFFECT.

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...DANGEROUS HEAT POTENTIAL.
SUNDAY...THUNDERSTORM POTENTIAL...DANGEROUS HEAT POTENTIAL.
MONDAY AND TUESDAY...DANGEROUS HEAT POTENTIAL.

EXTENDED DISCUSSION...
HOT AFTERNOON TEMPERATURES...WITH HEAT INDEX VALUES IN THE 100 TO
AROUND 110 DEGREE RANGE...ARE EXPECTED TO CONTINUE FOR THE NEXT
SEVERAL DAYS WITH LITTLE RELIEF. ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS WILL REMAIN POSSIBLE THE REMAINDER OF THE
WEEK...MAINLY ACROSS FAR EASTERN OKLAHOMA AND NORTHWEST ARKANSAS.
HIGH PRESSURE ALOFT THEN BUILDS BACK INTO THE REGION FOR THE
WEEKEND AND INTO EARLY NEXT WEEK...ALLOWING FOR THE DANGEROUS HEAT
TO CONTINUE.

EMERGENCY MANAGEMENT PLANNING STATEMENT...
REMAIN ALERT FOR ADDITIONAL EXCESSIVE HEAT WARNINGS AND HEAT
ADVISORIES INTO NEXT WEEK...AS THE HEAT BUILDS BACK INTO THE REGION.

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

In the hours before

Special weather statement, Jul 13, 2:14 PM CDT, 1 hour 45 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
214 PM CDT WED JUL 13 2011

ARZ029-131945-
SEBASTIAN AR-
214 PM CDT WED JUL 13 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 245 PM CDT
FOR THE FOLLOWING COUNTY...

IN WEST CENTRAL ARKANSAS
     SOUTHEASTERN SEBASTIAN

AT 215 PM CDT...STRONG THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 3 MILES WEST OF WITCHERVILLE TO 6 MILES SOUTHWEST OF
LIBERTY...MOVING SOUTHEAST AT 15 MPH. SOME LOCATIONS THAT WILL BE
AFFECTED BY THESE STORMS INCLUDE...LIBERTY...CROSSROADS...MILLTOWN...
ARKOLA...HUNTINGTON...DAYTON...WITCHERVILLE...WASHBURN AND MANSFIELD.

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 3513 9403 3514 9413 3510 9413 3510 9414
      3507 9423 3497 9422 3496 9423 3495 9426
      3494 9435 3517 9435 3519 9402
TIME...MOT...LOC 1915Z 297DEG 15KT 3513 9430 3495 9427
Special weather statement, Jul 13, 2:17 PM CDT, 1 hour 42 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
217 PM CDT WED JUL 13 2011

ARZ019-020-131945-
CRAWFORD AR-FRANKLIN AR-
217 PM CDT WED JUL 13 2011

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 245 PM CDT
FOR THE FOLLOWING COUNTIES...

IN NORTHWEST ARKANSAS
     NORTHEASTERN CRAWFORD

IN WEST CENTRAL ARKANSAS
     NORTHERN FRANKLIN

AT 218 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER PINEY...MOVING
EAST AT 20 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY THIS STORM
INCLUDE...PLEASANT HILL...PARADISE...PINEY...BIDVILLE...LONELM...
CRAVENS...WATALULA...JETHRO...MOUNTAIN TOP...FERN...BARNES...TURNERS
BEND...CASS...REDDING AND LOCKE.

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 3551 9407 3572 9412 3578 9385 3577 9378
      3557 9371
TIME...MOT...LOC 1918Z 254DEG 16KT 3562 9403
Special weather statement, Jul 13, 2:46 PM CDT, 1 hour 13 minutes before
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Special weather statement, Jul 13, 2:55 PM CDT, 1 hour 4 minutes before
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Special weather statement, Jul 13, 3:23 PM CDT, 36 minutes before
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Local storm report, Jul 13, 3:39 PM CDT, 20 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:00 PM CDTSpecial Weather StatementTSAMcIntosh60 min
Jul 12, 7:35 PM CDTSpecial Weather StatementTSAMuskogee40 min
Jul 12, 7:37 PM CDTSpecial Weather StatementTSAMcIntosh, Muskogee53 min
Jul 12, 8:02 PM CDTSevere Thunderstorm WarningTSAHaskell, Muskogee, Sequoyah58 min
Jul 12, 8:15 PM CDTSpecial Weather StatementTSACherokee45 min
Jul 12, 8:48 PM CDTSpecial Weather StatementTSASequoyah57 min
Jul 12, 11:22 PM CDTSpecial Weather StatementTSAOsage38 min
Jul 13, 5:24 AM CDTAreal Flood AdvisoryTSAOsage3 hr
Jul 13, 1:28 PM CDTSpecial Weather StatementTSASequoyah47 min
Jul 13, 1:31 PM CDTSevere Thunderstorm WarningTSALeFlore, Sequoyah44 min
Jul 13, 2:06 PM CDTSevere Thunderstorm WarningTSALeFlore, Sequoyah39 min
Jul 13, 2:55 PM CDTSpecial Weather StatementTSAPittsburg35 min
Jul 13, 3:23 PM CDTSpecial Weather StatementTSAPittsburg37 min
Jul 13, 4:21 PM CDTSpecial Weather StatementTSALeFlore24 min
Jul 13, 4:44 PM CDTSpecial Weather StatementTSAOkfuskee31 min
Jul 12, 8:40 PM CDTSpecial Weather StatementTSACrawford35 min
Jul 12, 9:07 PM CDTSpecial Weather StatementTSACrawford23 min
Jul 12, 9:40 PM CDTSpecial Weather StatementTSACrawford65 min
Jul 12, 11:07 PM CDTSpecial Weather StatementTSACarroll38 min
Jul 13, 2:14 PM CDTSpecial Weather StatementTSASebastian31 min
Jul 13, 2:17 PM CDTSpecial Weather StatementTSAFranklin28 min
Jul 13, 2:38 PM CDTSevere Thunderstorm WarningTSAFranklin, Sebastian26 min
Jul 13, 2:46 PM CDTSpecial Weather StatementTSAFranklin29 min

Nearby

Excessive Heat Watches in Oklahoma, 2011Excessive Heat Watches in Arkansas, 2011Every excessive heat watch 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.