Alert archive / Arkansas / Special Weather Statements in 2011

Special Weather Statement, NWS Tulsa, OK

July 29, 2011Crawford County, Arkansas

NWS Tulsa, OK issued this special weather statement at Jul 29, 2011, 2:18 PM CDT for Crawford County, Arkansas. 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 29, 2011, 2:18 PM CDT (19:18 UTC)
Expired
Jul 29, 2011, 2:45 PM CDT
In force
27 min
Issued by
NWS Tulsa, OK

County Crawford County, AR

The radar

The Western Arkansas radar (KSRX), 55 km from the middle of the area, began a volume at 19:19 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 12:00Z, 7.3 hours before the alert went out and 133 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, Springfield, MO at 12:00Z on 2011-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1783 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, Springfield, MO at 12:00Z on 2011-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 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
1783 J/kg
Mixed-layer CIN
-61 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
204 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 29, 12:36 PM CDT, 1 hour 42 minutes earlier.

Area forecast discussion, Jul 29, 12:36 PM CDT, 1 hour 42 minutes before
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</head>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Hazardous weather outlook, Jul 29, 1:06 PM CDT, 1 hour 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
106 PM CDT FRI JUL 29 2011

ARZ001-002-010-011-019-020-029-OKZ049-053>076-301000-
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-
100 PM CDT FRI JUL 29 2011

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...SOUTHEAST OKLAHOMA WEST CENTRAL AND NORTHWEST ARKANSAS.
	ONSET...MID AFTERNOON.

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

	AREA AT GREATEST RISK...URBAN AREAS.

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

DISCUSSION...
HEAT WILL PERSIST TODAY AS AN UPPER LEVEL RIDGE PREVAILS.
HIGH TEMPERATURES THIS AFTERNOON WILL BE IN THE 95 TO 105
RANGE WITH HEAT INDEX VALUES FROM AROUND 100 TO 110 DEGREES.

THE ONLY RELIEF FROM THE HEAT WILL BE SCATTERED SHOWERS AND
THUNDERSTORMS. THOSE WILL BE MOST NUMEROUS OVER SOUTHEAST
OKLAHOMA AND WEST CENTRAL AND NORTHWEST ARKANSAS THIS AFTERNOON
INTO EARLY EVENING. A FEW ISOLATED STORMS MAY HAVE THE POTENTIAL
TO GENERATE 70 MPH DOWNBURST WINDS.

DROUGHT CONDITIONS OVER MUCH OF THE AREA HAVE RESULTED IN
CURED VEGETATION...WHICH IGNITES VERY EASILY. AREAS OF EASTERN
OKLAHOMA ALONG AND NORTH OF I-44 WILL BE MOST VULNERABLE FOR
FIRES THIS AFTERNOON AND EARLY EVENING AS RELATIVE HUMIDITY
VALUES SINK TO NEAR 20 PERCENT AND SOUTHEAST WINDS REACH 10
TO 15 MPH.

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

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

EXTENDED DISCUSSION...
THE HEAT WAVE WILL CONTINUE INTO NEXT WEEK AS THE UPPER LEVEL
RIDGE LINGERS OVER THE PLAINS. CURRENT INDICATIONS ARE THAT
NEXT WEEK WILL BE AS HOT...IF NOT HOTTER...THAN THE PAST FEW DAYS.
THE ONLY RELIEF FROM THE HEAT WILL BE ISOLATED AFTERNOON AND EVENING
THUNDERSTORMS OVER THE WEEKEND.

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

In the hours before

Special weather statement, Jul 29, 2:18 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
218 PM CDT FRI JUL 29 2011

ARZ010-019-OKZ069-291945-
ADAIR OK-CRAWFORD AR-WASHINGTON AR-
218 PM CDT FRI JUL 29 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
     NORTHWESTERN CRAWFORD AND SOUTHWESTERN WASHINGTON

IN NORTHEAST OKLAHOMA
     SOUTHEASTERN ADAIR

AT 218 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 3 MILES EAST OF
ODELL...MOVING SOUTH AT 5 MPH. SOME LOCATIONS THAT WILL BE AFFECTED
BY THIS STORM INCLUDE...ODELL...BLACKBURN...STRICKLER...MORROW...
CLYDE...CANEHILL...NATURAL DAM...LEE CREEK AND DEVILS DEN STATE PARK.

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 3583 9414 3559 9434 3574 9459 3592 9441
TIME...MOT...LOC 1918Z 013DEG 3KT 3578 9436

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 4:06 AM CDTExcessive Heat WatchTSAAdair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more11 days
Jul 29, 3:23 PM CDTSpecial Weather StatementTSANowata37 min
Jul 29, 3:25 PM CDTSpecial Weather StatementTSAWashington35 min
Jul 29, 3:26 PM CDTSpecial Weather StatementTSAMayes34 min
Jul 29, 3:50 PM CDTSpecial Weather StatementTSAWashington25 min
Jul 29, 4:21 PM CDTSpecial Weather StatementTSACherokee24 min
Jul 29, 4:33 PM CDTSevere Thunderstorm WarningTSACherokee, Mayes42 min
Jul 29, 5:05 PM CDTSpecial Weather StatementTSADelaware25 min
Jul 29, 5:17 PM CDTSpecial Weather StatementTSARogers28 min
Jul 29, 5:23 PM CDTSpecial Weather StatementTSALeFlore67 min
Jul 29, 5:38 PM CDTSpecial Weather StatementTSACherokee52 min
Jul 29, 5:41 PM CDTSpecial Weather StatementTSAOttawa34 min
Jul 29, 6:02 PM CDTSpecial Weather StatementTSAPittsburg28 min
Jul 29, 6:21 PM CDTSpecial Weather StatementTSALatimer24 min
Jul 29, 5:14 PM CDTSpecial Weather StatementTSAJohnson31 min
Jul 29, 5:40 PM CDTSpecial Weather StatementTSABenton35 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.