Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 81, NWS Little Rock, AR

April 4, 2012Conway County, Faulkner County, Perry County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Apr 4, 2012, 9:56 PM CDT for Conway County, Faulkner County, Perry County, Arkansas. It was in force for 19 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: Apr 4, 2012, 9:56 PM CDT (02:56 UTC)
Expired: Apr 4, 2012, 10:15 PM CDT
In force: 19 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Conway County, AR, Faulkner County, AR, Perry County, AR

The radar

The Little Rock radar (KLZK), 48 km from the middle of the area, began a volume at 02:56 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 00:00Z, 2.9 hours before the alert went out and 223 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: 211 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 1374 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: -32 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 Apr 4, 6:55 PM CDT, 3 hours 1 minute earlier.

Area forecast discussion, Apr 4, 6:55 PM CDT, 3 hours 1 minute before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LITTLE ROCK AR
655 PM CDT WED APR 4 2012

.AVIATION...05/00Z TAF CYCLE

MAIN FCST CONCERN DURG THE PD WL BE THE UPR LOW OVR CNTRL OK THAT
WL MOVE EWD AND PASS ACRS AR LATER TNGT AND ON THU. CIGS ASSOCD
WITH THE UPR LOW ARE EXPECTED TO RMN AT VFR LVLS...WITH A FEW SHRA
POSSIBLE VCNTY OF THE LOW CENTER. LOW CONFIDENCE WITH PRECIP CHCS...
SO WENT WITH VCSH AT MOST SITES LATER TNGT. LINGER PRECIP CHCS
POSSIBLE THU MRNG OVR ERN AR. W/SWLY SFC WINDS WL SHIFT TO THE NW
LATE THU MRNG/THU AFTN WITH SPEEDS OF 5 TO 10 MPH COMMON. /44/
&&

.PREV DISCUSSION... /ISSUED 242 PM CDT WED APR 4 2012/

SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT
FRONTAL BOUNDARY OVER WESTERN ARKANSAS WILL MOVE EAST TONIGHT...AS
AN UPPER LEVEL LOW PRESSURE SYSTEM PUSHES IN BEHIND IT. SCATTERED
SHOWERS/ISOLATED THUNDERSTORMS WILL BE POSSIBLE TONIGHT AND
THURSDAY AS THE SYSTEM PUSHES ACROSS. ANY LINGERING PRECIPITATION
WILL COME TO AN END BY LATE THURSDAY AFTERNOON.

NORTHWEST FLOW ALOFT WILL BRING HIGH PRESSURE ACROSS THE REGION
FRIDAY AND FRIDAY NIGHT. WITH A MOSTLY CLEAR SKY...AND LIGHT EAST WINDS...
TEMPERATURES HAVE A GOOD SHOT AT DIPPING DOWN INTO THE 40S IN MOST
AREAS FRIDAY NIGHT/EARLY SATURDAY MORNING.

THE HIGH PRESSURE WILL SHIFT EAST SATURDAY...WITH A GRADUAL
WARMING TREND ENSUING. A COLD FRONT WILL MOVE INTO THE STATE LATE
SATURDAY...BRINGING A CHANCE OF SHOWERS AND THUNDERSTORMS BACK TO
THE FORECAST.

TEMPERATURES WILL END THE PERIOD MOSTLY WITHIN FIVE DEGREES OF
SEASONAL AVERAGES.

LONG TERM...SUNDAY THROUGH WEDNESDAY
AN UPPER RIDGE WILL BE OVER THE CENTRAL PART OF THE U.S. TO BEGIN
THE PERIOD WITH AN UPPER LOW MOVING THROUGH THE GREAT LAKES. AS THE
LOW MOVES EAST ANOTHER RIDGE BUILDS OVER THE ROCKIES MONDAY...AND
NORTHWEST FLOW ALOFT DEVELOPS OVER ARKANSAS. THIS RIDGE REMAINS IN
PLACE TUESDAY AND BEGINS MOVING EAST WEDNESDAY.

A COLD FRONT SHOULD BE EXITING SOUTH AND EAST ARKANSAS SUNDAY
MORNING. WILL KEEP A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
MAINLY SUNDAY MORNING. A SHORT WAVE WILL BRING ANOTHER CHANCE OF
SHOWERS AND THUNDERSTORMS MONDAY. MUCH DRIER AIR SETTLES IN FOR
TUESDAY AND WEDNESDAY. ABOVE NORMAL TEMPERATURES ARE EXPECTED
MONDAY...THEN NEAR TO BELOW NORMAL FOR TUESDAY AND WEDNESDAY.
&&

.LZK WATCHES/WARNINGS/ADVISORIES...NONE.
&&

Hazardous weather outlook, Apr 4, 7:30 PM CDT, 2 hours 26 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
730 PM CDT WED APR 4 2012

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-051000-
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-
730 PM CDT WED APR 4 2012

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

.DAY ONE...TONIGHT

AN UPPER LEVEL LOW PRESSURE SYSTEM WILL CONTINUE MOVING EASTWARD
ACROSS OKLAHOMA AND EVENTUALLY WORK INTO WESTERN ARKANSAS LATER
TONIGHT. A SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS WILL ACCOMPANY
THIS FEATURE...BUT THE CHANCES OF ORGANIZED SEVERE WEATHER WILL BE
LIMITED.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SMALL CHANCES OF SHOWERS AND THUNDERSTORMS WILL LINGER OVER THE
REGION EARLY ON THURSDAY AS THE AFOREMENTIONED UPPER LOW CONTINUES
MOVING EASTWARD. RAIN CHANCES WILL DIMINISH THURSDAY AFTERNOON AS
THE UPPER LOW MOVES EAST OF ARKANSAS.

ANOTHER COLD FRONT WILL MOVE INTO THE STATE ON SATURDAY AND SUNDAY.
SLIGHT CHANCES OF SHOWERS AND THUNDERSTORMS WILL ACCOMPANY THE
FRONT. SEVERE WEATHER IS NOT EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

&&

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

64/44

In the hours before

Local storm report, Apr 4, 8:38 PM CDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
838 PM CDT WED APR 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0832 PM     HAIL             GILKEY                  35.00N 93.36W
04/04/2012  E1.50 INCH       YELL               AR   LAW ENFORCEMENT

&&

BJS

Local storm report, Apr 4, 8:46 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
846 PM CDT WED APR 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0844 PM     HAIL             2 E PLAINVIEW           34.49N 91.29W
04/04/2012  E2.00 INCH       ARKANSAS           AR   TRAINED SPOTTER

&&

BJS

Local storm report, Apr 4, 8:49 PM CDT, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
849 PM CDT WED APR 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0844 PM     HAIL             2 E PLAINVIEW           34.99N 93.26W
04/04/2012  E2.00 INCH       YELL               AR   TRAINED SPOTTER

&&

BJS

Local storm report, Apr 4, 8:53 PM CDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
853 PM CDT WED APR 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0844 PM     HAIL             PLAINVIEW               34.99N 93.30W
04/04/2012  E1.75 INCH       YELL               AR   LAW ENFORCEMENT

            GOLF BALL SIZE HAIL COVERING THE GROUND IN PLAINVIEW

&&

BJS

Local storm report, Apr 4, 9:02 PM CDT, 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
902 PM CDT WED APR 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0855 PM     HAIL             1 E OLA                 35.03N 93.21W
04/04/2012  E1.75 INCH       YELL               AR   TRAINED SPOTTER

&&

44

Special weather statement, Apr 4, 9:38 PM CDT, 18 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 7:57 PM CDT	Special Weather Statement	LZK	Yell	28 min
Apr 4, 8:07 PM CDT	Severe Thunderstorm Warning	LZK	Perry, Yell	38 min
Apr 4, 8:41 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Perry, Pope, Yell	49 min
Apr 4, 9:23 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Perry	37 min
Apr 4, 9:38 PM CDT	Special Weather Statement	LZK	Yell	47 min
Apr 4, 10:00 PM CDT	Special Weather Statement	LZK	Pope	30 min
Apr 4, 10:15 PM CDT	Special Weather Statement	LZK	Faulkner	30 min
Apr 4, 10:38 PM CDT	Special Weather Statement	LZK	Cleburne	32 min
Apr 4, 10:44 PM CDT	Special Weather Statement	LZK	Van Buren	31 min
Apr 4, 10:59 PM CDT	Special Weather Statement	LZK	Searcy	31 min
Apr 4, 11:17 PM CDT	Special Weather Statement	LZK	Independence	28 min
Apr 5, 12:56 AM CDT	Severe Thunderstorm Warning	LZK	Bradley	22 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.