Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 326, NWS Little Rock, AR

August 8, 2012Polk County, Scott County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Aug 8, 2012, 1:41 PM CDT for Polk County, Scott County, Arkansas. It was in force for 34 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: Aug 8, 2012, 1:41 PM CDT (18:41 UTC)
Expired: Aug 8, 2012, 2:15 PM CDT
In force: 34 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Polk County, AR, Scott County, AR

The radar

The Western Arkansas radar (KSRX), 71 km from the middle of the area, began a volume at 18:42 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 (KBAD), launched 12:00Z, 6.7 hours before the alert went out and 247 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2782 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 818 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 19 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 Aug 8, 12:42 PM CDT, 59 minutes earlier.

Area forecast discussion, Aug 8, 12:42 PM CDT, 59 minutes before

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Hazardous weather outlook, Aug 8, 9:23 AM CDT, 4 hours 18 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
923 AM CDT WED AUG 8 2012

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-091000-
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-
923 AM CDT WED AUG 8 2012

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

.DAY ONE...TODAY AND TONIGHT

ISOLATED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS THE
WESTERN HALF OF THE STATE TODAY...AS A WEAK DISTURBANCE MOVES ACROSS
THE REGION. MOST STORMS WILL REMAIN BELOW SEVERE LIMITS.
HOWEVER...THERE IS THE POTENTIAL FOR AN ISOLATED SEVERE STORM OR
TWO. IN SUCH A CASE...DAMAGING WINDS AND SEVERE HAIL WILL BE THE
MAIN HAZARDS.

HIGHS TODAY WILL BE NEAR 100 DEGREES...WITH HEAT INDEX VALUES
RANGING FROM 100 TO 105 DEGREES.

FIRE DANGER REMAINS EXTREME ACROSS MUCH OF THE STATE DUE TO THE
ONGOING DROUGHT CONDITIONS. BURN BANS ARE IN PLACE IN MANY COUNTIES
OF ARKANSAS...AND ANY UNCONTROLLED OR ACCIDENTAL FIRE COULD QUICKLY
GROW OUT OF CONTROL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A COLD FRONT WILL MOVE INTO THE STATE THURSDAY...WITH SCATTERED
SHOWERS AND THUNDERSTORMS ACCOMPANYING IT. AGAIN...MOST STORMS WILL
REMAIN BELOW SEVERE LIMITS BUT AN ISOLATED SEVERE STORM OR TWO
CANNOT BE RULED OUT. DAMAGING WINDS AND SOME LARGE HAIL WOULD BE THE
MAIN THREATS FROM SUCH STORMS.

WIDESPREAD RAINFALL IS NOT LIKELY...SO EXTREME WILDFIRE DANGER WILL
CONTINUE.

AFTER THE FRONT MOVES THROUGH THE STATE FRIDAY...COOLER AND DRIER
AIR WILL MOVE INTO THE REGION. THE NEXT CHANCE FOR RAIN WILL BE
EARLY NEXT WEEK...AS ANOTHER DISTURBANCE MOVES INTO THE REGION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

&&

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

58

In the hours before

Special weather statement, Aug 8, 9:53 AM CDT, 3 hours 48 minutes before

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Special weather statement, Aug 8, 11:46 AM CDT, 1 hour 55 minutes before

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Special weather statement, Aug 8, 12:37 PM CDT, 1 hour 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1237 PM CDT WED AUG 8 2012

ARZ037-040-041-081820-
MONTGOMERY AR-POLK AR-SCOTT AR-
1237 PM CDT WED AUG 8 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SCOTT...NORTHEASTERN
POLK AND NORTHWESTERN MONTGOMERY COUNTIES UNTIL 115 PM CDT...

AT 1234 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 10 MILES NORTHWEST OF ODEN...OR 17 MILES
SOUTHEAST OF WALDRON...MOVING EAST AT 10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  ODEN...               MIMOSA...             SIMS...
  PINE RIDGE...         PENCIL BLUFF...       WHITETOWN...
  ROCKY SHOALS REC AREA...                    POSEY HOLLOW...
  NORTH FORK LAKE...    MILL CREEK REC AREA...
  LAMB MTN...           IRONS FORK MTN...     HUDDLESTON...
  HOG JAW...            GRAPEVINE MTN...      GOLDSBERRY MTN...
  GASTON...             BUCK KNOB...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3473 9364 3450 9373 3463 9407 3480 9400
TIME...MOT...LOC 1737Z 289DEG 7KT 3468 9393

56

Special weather statement, Aug 8, 12:45 PM CDT, 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1245 PM CDT WED AUG 8 2012

ARZ030-037-038-081830-
LOGAN AR-SCOTT AR-YELL AR-
1245 PM CDT WED AUG 8 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN YELL...NORTHEASTERN
SCOTT AND EXTREME SOUTHERN LOGAN COUNTIES UNTIL 130 PM CDT...

AT 1242 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 7 MILES SOUTHWEST OF STONEHOUSE REC AREA...OR
16 MILES SOUTHEAST OF BOONEVILLE...MOVING EAST AT 10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  STONEHOUSE REC AREA...                      MUDDY CREEK WMA...
  FOURCHE VALLEY...     WALTREAK...           UNION HILL...
  OLIO...               NOLA...               HARVEY...
  GRAVELLY...           CHULA...              BLUFFTON...
  BLUE BALL...          PLEASANT HILL...      LITTLE TEXAS...
  FREEDOM MTN...        DUTCH CREEK MTN...    CHALYBEATE SPGS...
  CALLAHAN KNOB...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3499 9346 3475 9356 3488 9389 3505 9382
TIME...MOT...LOC 1745Z 289DEG 7KT 3494 9375

56

Special weather statement, Aug 8, 1:14 PM CDT, 27 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
114 PM CDT WED AUG 8 2012

ARZ003-012-081900-
BOONE AR-NEWTON AR-
114 PM CDT WED AUG 8 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN BOONE AND NORTHERN
NEWTON COUNTIES UNTIL 200 PM CDT...

AT 112 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 4 MILES WEST OF ERBIE...OR 5 MILES NORTHEAST OF
LOST VALLEY SP...MOVING SOUTHEAST AT 10 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  LOST VALLEY SP...     JASPER...             PRUITT...
  PIERCETOWN...         ERBIE...              WAYTON...
  VENDOR...             PONCA...              PARTHENON...
  MT SHERMAN...         MARBLE FALLS...       LOW GAP...
  HASTY...              CROSSROAD...          COMPTON...
  THE BASIN...          STOVERVILLE...        STEEL CREEK...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

LAT...LON 3607 9307 3604 9301 3584 9318 3604 9346
      3606 9344 3613 9338 3613 9331 3618 9331
TIME...MOT...LOC 1814Z 305DEG 7KT 3606 9331

56

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 7:25 PM CDT	Special Weather Statement	LZK	Clark	30 min
Aug 7, 7:31 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Pike	29 min
Aug 8, 9:53 AM CDT	Special Weather Statement	LZK	Perry	47 min
Aug 8, 11:46 AM CDT	Special Weather Statement	LZK	Logan	44 min
Aug 8, 12:37 PM CDT	Special Weather Statement	LZK	Montgomery	43 min
Aug 8, 12:45 PM CDT	Special Weather Statement	LZK	Yell	45 min
Aug 8, 1:08 PM CDT	Severe Thunderstorm Warning	LZK	Montgomery, Scott, Yell	37 min
Aug 8, 1:14 PM CDT	Special Weather Statement	LZK	Newton	46 min
Aug 8, 1:43 PM CDT	Special Weather Statement	LZK	Johnson	47 min
Aug 8, 1:48 PM CDT	Severe Thunderstorm Warning	LZK	Johnson	42 min
Aug 8, 2:18 PM CDT	Special Weather Statement	LZK	Scott	47 min
Aug 8, 2:19 PM CDT	Severe Thunderstorm Warning	LZK	Montgomery, Pike, Polk	26 min
Aug 8, 2:40 PM CDT	Special Weather Statement	LZK	Logan	30 min
Aug 8, 2:57 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Hot Spring	33 min
Aug 8, 3:15 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Hot Spring	15 min
Aug 8, 3:30 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Hot Spring, Montgomery, Pike	30 min
Aug 8, 3:40 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Hot Spring	35 min
Aug 8, 3:41 PM CDT	Special Weather Statement	LZK	Polk	44 min
Aug 8, 3:53 PM CDT	Special Weather Statement	LZK	Conway	32 min
Aug 8, 4:04 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Dallas, Ouachita	26 min
Aug 8, 4:21 PM CDT	Special Weather Statement	LZK	Faulkner	29 min
Aug 8, 4:22 PM CDT	Special Weather Statement	LZK	Calhoun	48 min
Aug 8, 4:36 PM CDT	Special Weather Statement	LZK	Dallas	29 min
Aug 8, 4:46 PM CDT	Special Weather Statement	LZK	Perry	29 min
Aug 8, 4:47 PM CDT	Special Weather Statement	LZK	Faulkner	28 min
Aug 8, 5:13 PM CDT	Severe Thunderstorm Warning	LZK	Faulkner, Pulaski	32 min
Aug 8, 5:15 PM CDT	Special Weather Statement	LZK	Pulaski	30 min
Aug 8, 5:18 PM CDT	Severe Thunderstorm Warning	LZK	Bradley, Calhoun	27 min
Aug 8, 5:35 PM CDT	Special Weather Statement	LZK	Calhoun	60 min
Aug 8, 5:41 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, Pulaski, Saline	34 min
Aug 8, 6:33 PM CDT	Special Weather Statement	LZK	Desha	27 min
Aug 8, 6:42 PM CDT	Special Weather Statement	LZK	Drew	23 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2012 Every severe thunderstorm warning in 2012

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.