Alert archive / Arkansas / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

July 1, 2011Sebastian County, Arkansas

NWS Tulsa, OK issued this special weather statement at Jul 1, 2011, 6:42 PM CDT for Sebastian County, Arkansas. It was in force for 33 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 1, 2011, 6:42 PM CDT (23:42 UTC)
Expired
Jul 1, 2011, 7:15 PM CDT
In force
33 min
Issued by
NWS Tulsa, OK

County Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 21 km from the middle of the area, began a volume at 23:45 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

Shreveport, LA (KSHV), launched 12:00Z, 11.7 hours before the alert went out and 300 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 12:00Z on 2011-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 628 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 12:00Z on 2011-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 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
628 J/kg
Mixed-layer CIN
-171 J/kg
Mixed-layer LCL
1390 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
38 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 1, 6:15 PM CDT, 27 minutes earlier.

Area forecast discussion, Jul 1, 6:15 PM CDT, 27 minutes before
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Hazardous weather outlook, Jul 1, 4:05 PM CDT, 2 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
405 PM CDT FRI JUL 1 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-021000-
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-
405 PM CDT FRI JUL 1 2011

...DANGEROUS HEAT WILL CONTINUE INTO THE 4TH OF JULY WEEKEND...

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

.DAY ONE...LATE AFTERNOON THROUGH AND TONIGHT.

THUNDERSTORMS WITH DANGEROUS LIGHTNING.
	RISK...LIMITED.
	AREA...SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS.
	ONSET...ONGOING.

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

FIRE WEATHER DANGER.
	RISK...LIMITED.
	AREA...NORTHEAST OKLAHOMA.
	ONSET...ONGOING.

DISCUSSION...
ISOLATED THUNDERSTORMS WILL BE POSSIBLE INTO THE EARLY EVENING
ACROSS SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. BRIEF GUSTY
WINDS MAY OCCUR AS INDIVIDUAL STORMS DISSIPATE.

HEAT INDEX VALUES WILL TOP OUT IN THE 100 TO 105 DEGREE RANGE LATE
THIS AFTERNOON. AN EXCESSIVE HEAT WARNING AND HEAT ADVISORY REMAINS
IN EFFECT ACROSS MOST OF THE AREA THROUGH MID-EVENING.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
DUE TO THE ISOLATED NATURE OF THUNDERSTORMS...SPOTTER ACTIVATION NOT
EXPECTED.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
SATURDAY THROUGH MONDAY...THUNDERSTORM POTENTIAL...DANGEROUS HEAT
POTENTIAL.
TUESDAY...DANGEROUS HEAT POTENTIAL.
WEDNESDAY AND THURSDAY...THUNDERSTORM POTENTIAL...DANGEROUS HEAT
POTENTIAL.

EXTENDED DISCUSSION...
HOT TEMPERATURES ARE EXPECTED TO CONTINUE ACROSS THE REGION THROUGH
THE HOLIDAY WEEKEND AND INTO NEXT WEEK. HEAT INDEX VALUES IN THE RANGE
OF AROUND 100 TO NEAR 105 DEGREES WILL BE CAPABLE THROUGHOUT EASTERN
OKLAHOMA AND NORTHWEST ARKANSAS.

A SERIES OF SMALL DISTURBANCES LOOK TO TRY TO PUSH THROUGH THE
REGION UNDERNEATH THE RIDGE ALOFT. SLIGHT CHANCES FOR
THUNDERSTORMS WILL BE POSSIBLE...THOUGH THE MAJORITY OF ANY PRECIP
LOOKS TO REMAIN NORTH OF THE REGION.

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

In the hours before

Local storm report, Jul 1, 5:52 PM CDT, 50 minutes before
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Special weather statement, Jul 1, 6:10 PM CDT, 32 minutes before
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Special weather statement, Jul 1, 6:42 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
Jun 30, 9:37 PM CDTHeat AdvisoryTSACherokee, Choctaw, Delaware, Haskell, Latimer, McIntosh and 6 more23 hr
Jul 1, 6:10 PM CDTSpecial Weather StatementTSAOkfuskee35 min

Nearby

Special Weather Statements in Arkansas, 2011Every 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.