Alert archive / Oklahoma / Special Weather Statements in 2015

Special Weather Statement, NWS Tulsa, OK

July 20, 2015Washington County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Jul 20, 2015, 2:33 PM CDT for Washington County, Oklahoma. It was in force for 27 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 20, 2015, 2:33 PM CDT (19:33 UTC)
Expired
Jul 20, 2015, 3:00 PM CDT
In force
27 min
Issued by
NWS Tulsa, OK

County Washington County, OK

The radar

The Tulsa radar (KINX), 46 km from the middle of the area, began a volume at 19:34 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, 7.6 hours before the alert went out and 192 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 2015-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 680 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 2015-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
680 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
1488 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
34 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 20, 12:43 PM CDT, 1 hour 50 minutes earlier.

Area forecast discussion, Jul 20, 12:43 PM CDT, 1 hour 50 minutes before
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Hazardous weather outlook, Jul 20, 1:04 PM CDT, 1 hour 29 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
104 PM CDT MON JUL 20 2015

ARZ001-002-010-011-019-020-029-OKZ049-053>076-211030-
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-
104 PM CDT MON JUL 20 2015

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

.DAY ONE...TODAY AND TONIGHT.

SEVERE THUNDERSTORM.
	RISK...LIMITED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS NORTH OF I40.
	ONSET...LATE AFTERNOON OR EARLY EVENING.

FLASH FLOOD.
	RISK...ELEVATED.
	AREA...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS NORTH OF I40 .
	ONSET...EVENING.

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

	AREA AT GREATEST RISK...URBAN AREAS.

DISCUSSION...
EASTERN OKLAHOMA AND WEST CENTRAL ARKANSAS WILL SEE HEAT
INDEX VALUES OF 105 TO 110 TODAY...WITH ISOLATED VALUES
NEAR 112.

A WEST TO EAST FRONTAL BOUNDARY WILL SAG SOUTH FROM KANSAS
INTO NORTHEAST OKLAHOMA  AND NORTHWEST ARKANSAS OVERNIGHT.
SCATTERED THUNDERSTORMS MAY DEVELOP AS EARLY AS LATE AFTERNOON
IN NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS. THUNDERSTORMS
ARE MORE LIKELY THIS EVENING AND OVERNIGHT. INSTABILITY WILL
BE ADEQUATE FOR STRONG TO MARGINALLY SEVERE STORMS WITH DAMAGING
WIND AND LOCALLY HEAVY RAINFALL THE PRIMARY THREATS.

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

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.
TUESDAY...THROUGH THURSDAY...THUNDERSTORM POTENTIAL...DANGEROUS HEAT POTENTIAL.
FRIDAY...DANGEROUS HEAT POTENTIAL.
SATURDAY...DANGEROUS HEAT POTENTIAL.
SUNDAY...THUNDERSTORM POTENTIAL...DANGEROUS HEAT POTENTIAL.

EXTENDED DISCUSSION...
THUNDERSTORM CHANCES WILL CONTINUE THROUGH WEDNESDAY WITH A
THREAT FOR LOCALLY HEAVY RAINFALL. THIS WILL BRING SOME RELIEF
FROM THE HEAT BEFORE VERY HOT WEATHER RETURNS BY THE END OF THE
WEEK THROUGH NEXT WEEKEND.

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

In the hours before

Special weather statement, Jul 20, 2:33 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 20, 2:56 PM CDTSpecial Weather StatementTSARogers34 min
Jul 20, 3:20 PM CDTSpecial Weather StatementTSAWagoner25 min
Jul 20, 3:37 PM CDTSpecial Weather StatementTSAMayes23 min
Jul 20, 3:44 PM CDTSpecial Weather StatementTSAWagoner31 min
Jul 20, 4:01 PM CDTSpecial Weather StatementTSAMayes29 min
Jul 20, 4:09 PM CDTSpecial Weather StatementTSATulsa36 min
Jul 20, 4:12 PM CDTSpecial Weather StatementTSAWagoner33 min
Jul 20, 4:16 PM CDTSevere Thunderstorm WarningTSAWagoner29 min
Jul 20, 4:46 PM CDTSpecial Weather StatementTSAWagoner44 min
Jul 20, 4:53 PM CDTAreal Flood AdvisoryTSARogers, Tulsa, Wagoner112 min
Jul 20, 4:55 PM CDTSevere Thunderstorm WarningTSACreek, Okmulgee, Tulsa35 min
Jul 20, 5:08 PM CDTSpecial Weather StatementTSADelaware37 min
Jul 20, 5:09 PM CDTSevere Thunderstorm WarningTSAMuskogee, Okmulgee, Wagoner36 min
Jul 20, 5:26 PM CDTSpecial Weather StatementTSAOkmulgee34 min
Jul 20, 5:31 PM CDTSpecial Weather StatementTSAOkfuskee29 min
Jul 20, 6:30 PM CDTSpecial Weather StatementTSACarroll45 min

Nearby

Special Weather Statements in Oklahoma, 2015Every special weather statement in 2015

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.