Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 707, NWS Little Rock, AR

July 24, 20114 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Jul 24, 2011, 2:00 PM CDT for 4 counties in Arkansas. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 24, 2011, 2:00 PM CDT (19:00 UTC)
Expired
Jul 24, 2011, 2:45 PM CDT
In force
45 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon

Counties Cleburne County, AR, Faulkner County, AR, Van Buren County, AR, White County, AR

The radar

The Little Rock radar (KLZK), 61 km from the middle of the area, began a volume at 19:00 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

Little Rock, AR (KLZK), launched 12:00Z, 7.0 hours before the alert went out and 210 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, Little Rock, AR at 12:00Z on 2011-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2983 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, Little Rock, AR at 12:00Z on 2011-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 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
2983 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
942 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
80 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 24, 12:36 PM CDT, 1 hour 24 minutes earlier.

Area forecast discussion, Jul 24, 12:36 PM CDT, 1 hour 24 minutes before
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Hazardous weather outlook, Jul 24, 5:00 AM CDT, 9 hours before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LITTLE ROCK AR
500 AM CDT SUN JUL 24 2011

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-251000-
ARKANSAS-BAXTER-BOONE-BRADLEY-CALHOUN-CLARK-CLEBURNE-CLEVELAND-
CONWAY-DALLAS-DESHA-DREW-FAULKNER-FULTON-GARLAND-GRANT-HOT SPRING-
INDEPENDENCE-IZARD-JACKSON-JEFFERSON-JOHNSON-LINCOLN-LOGAN-LONOKE-
MARION-MONROE-MONTGOMERY-NEWTON-OUACHITA-PERRY-PIKE-POLK-POPE-
PRAIRIE-PULASKI-SALINE-SCOTT-SEARCY-SHARP-STONE-VAN BUREN-WHITE-
WOODRUFF-YELL-
500 AM CDT SUN JUL 24 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR A LARGE PART OF ARKANSAS.

.DAY ONE...TODAY AND TONIGHT

A HEAT ADVISORY IS IN EFFECT FOR THE FORECAST AREA TODAY DUE TO
CONTINUED HOT AND HUMID CONDITIONS. AFTERNOON HIGH TEMPERATURES
WILL BE IN THE UPPER 90S TO AROUND 100...AND HEAT INDEX VALUES OF
AROUND 105 DEGREES ARE EXPECTED.

ISOLATED TO SCATTERED THUNDERSTORMS WILL AGAIN BE SEEN ACROSS THE
STATE TODAY. WHILE WIDESPREAD SEVERE STORMS ARE NOT EXPECTED...A FEW
STORMS COULD BECOME SEVERE. DAMAGING WINDS WOULD BE THE GREATEST
THREAT FROM ANY STRONG TO SEVERE STORMS TODAY.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THE HOT AND HUMID WEATHER CONDITIONS WILL CONTINUE THROUGH AT LEAST
WEDNESDAY. DURING THIS TIME AFTERNOON HIGH TEMPERATURES WILL BE IN
THE MID TO UPPER 90S...WITH SOME LOCATIONS SEEING HIGHS OVER 100.
THIS WILL CREATE DANGEROUS HEAT CONDITIONS...AND AFTERNOON HEAT
INDEX VALUES WILL REACH AROUND 105 DEGREES AND ABOVE IN MANY
LOCATIONS ACROSS THE STATE EACH DAY.

ALSO...ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL BE
POSSIBLE...MAINLY IN THE AFTERNOON TO EARLY EVENING HOURS. WHILE
WIDESPREAD SEVERE WEATHER IS NOT EXPECTED...SOME STORMS COULD
BECOME STRONG TO SEVERE...WITH DAMAGING WINDS THE MAIN THREAT.

A SLIGHT BREAK IN THE HEAT MAY BE SEEN BY THE END OF THE WORK WEEK
AS THE STRONG UPPER LEVEL RIDGE MOVES EAST.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

&&

VISIT NWS LITTLE ROCK ON THE WEB. GO TO HTTP://WEATHER.GOV AND
CLICK ON CENTRAL ARKANSAS.

63

In the hours before

Special weather statement, Jul 24, 1:26 PM CDT, 34 minutes before
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Special weather statement, Jul 24, 1:41 PM CDT, 19 minutes before
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Special weather statement, Jul 24, 1:52 PM CDT, 8 minutes before
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Special weather statement, Jul 24, 1:55 PM CDT, 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
155 PM CDT SUN JUL 24 2011

ARZ025-033-034-241940-
JACKSON AR-WHITE AR-WOODRUFF AR-
155 PM CDT SUN JUL 24 2011

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN WHITE...NORTHWESTERN
WOODRUFF AND SOUTHWESTERN JACKSON COUNTIES UNTIL 245 PM CDT...

AT 151 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 2 MILES NORTHEAST OF RUSSELL...OR 9 MILES
NORTHWEST OF AUGUSTA...MOVING SOUTH AT 5 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
  AUGUSTA...            RUSSELL...            BALD KNOB...
  WORDEN...             VELVET RIDGE...       HEFFINGTON...
  BRADFORD...           THREE SISTERS LAKE... THREE PRONG LAKE...
  TEAGUE LAKE...        RUSSELL MTN...        RIO VISTA...
  LONG LAKE...          LITTLE JORDAN LAKE... LIBERTY VALLEY...
  LAKE BALD KNOB...     BIG HURRICANE LAKE...
  BALD KNOB WILDLIFE REFUGE...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY...TURN AROUND DONT DROWN!

LAT...LON 3522 9136 3523 9163 3546 9159 3545 9136
TIME...MOT...LOC 1855Z 010DEG 6KT 3537 9148

/44
Special weather statement, Jul 24, 1:57 PM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
157 PM CDT SUN JUL 24 2011

ARZ007-016-241945-
INDEPENDENCE AR-SHARP AR-
157 PM CDT SUN JUL 24 2011

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN INDEPENDENCE AND
SOUTHERN SHARP COUNTIES UNTIL 245 PM CDT...

AT 155 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 6 MILES SOUTH OF CAVE CITY...OR 7 MILES NORTH OF
BATESVILLE...MOVING SOUTH AT 10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
  BATESVILLE...         SALADO...             NEWARK...
  MOOREFIELD...         MAGNESS...            CAVE CITY...
  SULPHUR ROCK...       SANDTOWN...           PFEIFFER...
  GAINESBORO...         DESHA...              CURIA...
  CHARLOTTE...          RAMSEY HILL...        MT ZION...
  MCHUE...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY...TURN AROUND DONT DROWN!

LAT...LON 3571 9138 3566 9168 3592 9171 3596 9150
TIME...MOT...LOC 1858Z 347DEG 10KT 3585 9158

/44

The office that day

Everything else NWS Little Rock, AR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 23, 7:12 PM CDTSpecial Weather StatementLZKGarland28 min
Jul 24, 1:21 PM CDTSevere Thunderstorm WarningLZKCleburne27 min
Jul 24, 1:26 PM CDTSpecial Weather StatementLZKPike44 min
Jul 24, 1:33 PM CDTSevere Thunderstorm WarningLZKClark, Montgomery, Pike27 min
Jul 24, 1:41 PM CDTSpecial Weather StatementLZKVan Buren44 min
Jul 24, 1:52 PM CDTSpecial Weather StatementLZKWhite48 min
Jul 24, 1:55 PM CDTSpecial Weather StatementLZKWhite45 min
Jul 24, 1:57 PM CDTSpecial Weather StatementLZKIndependence48 min
Jul 24, 2:16 PM CDTSevere Thunderstorm WarningLZKIndependence, Jackson28 min
Jul 24, 2:28 PM CDTSpecial Weather StatementLZKScott47 min
Jul 24, 2:33 PM CDTSpecial Weather StatementLZKWhite47 min
Jul 24, 2:36 PM CDTSpecial Weather StatementLZKPolk44 min
Jul 24, 2:38 PM CDTSpecial Weather StatementLZKJackson47 min
Jul 24, 2:51 PM CDTSevere Thunderstorm WarningLZKPolk24 min
Jul 24, 3:06 PM CDTSevere Thunderstorm WarningLZKClark, Ouachita24 min
Jul 24, 3:14 PM CDTSpecial Weather StatementLZKPolk31 min
Jul 24, 3:26 PM CDTSevere Thunderstorm WarningLZKClark38 min
Jul 24, 3:49 PM CDTSpecial Weather StatementLZKOuachita46 min
Jul 24, 3:50 PM CDTSpecial Weather StatementLZKPolk45 min
Jul 24, 3:56 PM CDTSevere Thunderstorm WarningLZKOuachita34 min
Jul 24, 4:11 PM CDTSevere Thunderstorm WarningLZKOuachita19 min
Jul 24, 4:29 PM CDTSevere Thunderstorm WarningLZKOuachita31 min
Jul 24, 4:30 PM CDTSpecial Weather StatementLZKOuachita30 min
Jul 24, 4:40 PM CDTSevere Thunderstorm WarningLZKDallas35 min
Jul 24, 4:58 PM CDTSpecial Weather StatementLZKOuachita32 min
Jul 24, 5:01 PM CDTSevere Thunderstorm WarningLZKDallas14 min
Jul 24, 5:15 PM CDTSpecial Weather StatementLZKDallas30 min
Jul 24, 6:31 PM CDTSpecial Weather StatementLZKLincoln29 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2011Every severe thunderstorm warning 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.