Alert archive / Arkansas / Special Weather Statements in 2012

Special Weather Statement, NWS Little Rock, AR

July 19, 2012Pulaski County, Arkansas

NWS Little Rock, AR issued this special weather statement at Jul 19, 2012, 7:35 PM CDT for Pulaski County, Arkansas. It was in force for 30 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 19, 2012, 7:35 PM CDT (00:35 UTC)
Expired
Jul 19, 2012, 8:05 PM CDT
In force
30 min
Issued by
NWS Little Rock, AR

County Pulaski County, AR

The radar

The Little Rock radar (KLZK), 17 km from the middle of the area, began a volume at 00:36 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 00:00Z, 0.6 hours before the alert went out and 200 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 00:00Z on 2012-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2260 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2012-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
2260 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
2244 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
88 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 Little Rock, AR wrote its last area forecast discussion before this special weather statement went out at Jul 19, 6:59 PM CDT, 36 minutes earlier.

Area forecast discussion, Jul 19, 6:59 PM CDT, 36 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LITTLE ROCK AR
659 PM CDT THU JUL 19 2012

.AVIATION...20/00Z TAF CYCLE

SCTD/NUMEROUS SHRA/TSRA CONTS TO DROP SLOLY SWD ACRS NRN AR ATTM.
EXPECT OVERALL WEAKENING TREND IN THE NEXT FEW HRS WITH THE LOSS
OF DAYTIME HEATING. A FEW STORMS STILL LINGER ACRS CNTRL AR...WITH
VCTS MENTIONED AT KLIT EARLY THIS EVENING. MOST OTHER FCST SITES
SHLD NOT BE IMPACTED BY CONVECTION...SO VFR CONDS WL CONT THRU
MUCH OF THE PD. ADDITIONAL STORMS ARE EXPECTED TO REFORM ON FRI...
MAINLY ACRS CNTRL AND SRN AR...AS A FNTL BNDRY DROPS SWD INTO AR
AND INTERACTS WITH RESIDUAL OUTFLOW BNDRY/S. /44/
&&

.PREV DISCUSSION... /ISSUED 237 PM CDT THU JUL 19 2012/

SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT
IN THE NEXT FEW HOURS...THE BIG STORY WILL BE THE PULSE-TYPE
STORMS. SOME OF THE STRONGER ONES WILL BE CAPABLE OF PRODUCING
DAMAGING WINDS...ESPECIALLY AS THEY COLLAPSE. THE STORMS WILL
DIMINISH AFTER SUNSET.

UPPER RIDGING CENTERED OVER THE PLAINS WILL PUSH A FRONTAL
BOUNDARY TOWARD THE REGION TONIGHT AND FRIDAY. ADDITIONAL SHOWERS
AND THUNDERSTORMS WILL BE POSSIBLE AS THE BOUNDARY MOVES INTO
ARKANSAS BY FRIDAY MORNING. PRE-FRONTAL HEATING AND MOISTURE/
INSTABILITY POOLING AHEAD OF THE BOUNDARY WILL BE ENOUGH TO
PRODUCE A THREAT OF STRONG TO SEVERE THUNDERSTORMS...PARTICULARLY
ALONG AND SOUTH OF INTERSTATE 40. SIMILAR TO TODAY/S SETUP...
DAMAGING WINDS WILL BE THE PRIMARY THREAT FROM ANY STRONG/SEVERE
STORMS...AND COVERAGE WILL BE ISOLATED OR SCATTERED.

DRIER AIR WILL ACCOMPANY THE FRONT...WHICH WILL MOVE IN AND
STALL/WASH OUT OVER THE AREA. THE DRIER AIR WILL HANG ON THROUGH
THE WEEKEND...WHICH SHOULD BE ENOUGH TO KEEP HEAT INDEX VALUES
BELOW ADVISORY CRITERIA.

LONG TERM...MONDAY THROUGH THURSDAY
UPPER LEVEL RIDGE WILL BE FIRMLY IN PLACE ACROSS THE CENTRAL
CONUS...WITH AR JUST ON THE SRN PERIPHERY OF THE CENTER OF THIS
RIDGE EARLY IN THE PERIOD. AS A RESULT...KEEP SLIGHT CHANCE POPS
ACROSS THE SRN THIRD OF THE CWA FOR DIURNALLY DRIVEN CONVECTION ON
MON. BEYOND THAT...THE UPPER RIDGE WILL BROADEN ENOUGH THAT POPS
WILL BE LOW ENOUGH TO KEEP MENTION OF OUT FORECAST THROUGH THE END
OF THE FORECAST. WHILE SOME ISOLATED DIURNALLY DRIVEN CONVECTION
WILL STILL BE POSSIBLE...CHANCES TOO LIMITED TO MENTION PRECIP AT
THIS TIME. TEMPS WILL ALSO BE ABOVE AVERAGE...WITH HIGHS GENERALLY
IN THE MID 90S TO LOW 100S. LOWS WILL BE IN THE UPPER 60S TO UPPER
70S.
&&

.LZK WATCHES/WARNINGS/ADVISORIES...
HEAT ADVISORY UNTIL 7 PM CDT FRIDAY FOR ARKANSAS-BRADLEY-CALHOUN-
CLARK-CLEBURNE-CLEVELAND-CONWAY-DALLAS-DESHA-DREW-FAULKNER-
FULTON-GARLAND-GRANT-HOT SPRING-INDEPENDENCE-IZARD-JACKSON-
JEFFERSON-LINCOLN-LONOKE-MONROE-MONTGOMERY-OUACHITA-PERRY-PIKE-
POPE-PRAIRIE-PULASKI-SALINE-SHARP-STONE-VAN BUREN-WHITE-WOODRUFF-
YELL.
&&
Hazardous weather outlook, Jul 19, 6:25 PM CDT, 1 hour 10 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
625 PM CDT THU JUL 19 2012

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-201000-
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-
625 PM CDT THU JUL 19 2012

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

.DAY ONE...TONIGHT

SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE TO
AFFECT PORTIONS OF NORTH ARKANSAS THIS EVENING AS A WEAK UPPER
DISTURBANCE DROPS SLOWLY SOUTHWARD. SOME STRONG AND SEVERE STORMS
WILL BE POSSIBLE THROUGH THE EVENING HOURS...WITH DAMAGING WINDS THE
MAIN THREAT.

ELSEWHERE ACROSS THE AREA...ISOLATED THUNDERSTORMS WILL BE POSSIBLE
THIS EVENING...BUT WILL REMAIN SPOTTY IN NATURE. HOWEVER...
WIDESPREAD SEVERE WEATHER IS NOT EXPECTED. MOST OF THE ACTIVITY IS
EXPECTED TO GRADUALLY DECREASE LATER THIS EVENING WITH THE LOSS OF
DAYTIME HEATING.

THERE IS A HIGH WILDFIRE DANGER DUE TO CONTINUING DROUGHT CONDITIONS
AND DRY VEGETATION. MOST COUNTIES HAVE BURN BANS IN PLACE. OUTDOOR
BURNING OF ANY KIND IS STRONGLY DISCOURAGED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE AFOREMENTIONED WEAK UPPER DISTURBANCE WILL CONTINUE TO SLOWLY
DROP SOUTH THROUGH TOMORROW AFTERNOON...WITH ISOLATED TO SCATTERED
WILL SHOWERS AND THUNDERSTORMS POSSIBLE ACROSS THE SOUTHERN
HALF OF THE AREA. SOME OF THESE STORMS COULD BECOME BRIEFLY SEVERE
DURING THE AFTERNOON HOURS ON FRIDAY...WITH DAMAGING WINDS THE MAIN
THREAT.

SOMEWHAT DRIER AIR WILL FILTER INTO THE STATE FROM THE NORTH
BEHIND A WEAK FRONT ASSOCIATED WITH THIS UPPER DISTURBANCE. THIS
WILL LIMIT THE POTENTIAL FOR AFTERNOON SHOWERS AND THUNDERSTORMS
FOR A GOOD PORTION OF THE STATE THIS WEEKEND. HOWEVER...PORTIONS
OF SOUTHERN ARKANSAS WILL REMAIN IN HIGHER MOISTURE...WITH
AFTERNOON ISOLATED SHOWERS AND THUNDERSTORM MORE POSSIBLE.

THE OPPRESSIVE HEAT WILL CONTINUE TO BE A SIGNIFICANT THREAT
THROUGH EARLY NEXT WEEK AS TEMPERATURES HOVER AROUND 100 DEGREES.
HEAT INDICES WILL RANGE FROM 100 TO 110 THIS WEEKEND...WITH THE
HIGHEST VALUES ACROSS THE SOUTHERN SECTIONS OF THE STATE WHERE
HIGHER HUMIDITY LEVELS WILL REMAIN.

.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.

56/62/44

In the hours before

Special weather statement, Jul 19, 5:24 PM CDT, 2 hours 11 minutes before
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Special weather statement, Jul 19, 5:44 PM CDT, 1 hour 51 minutes before
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Special weather statement, Jul 19, 5:51 PM CDT, 1 hour 44 minutes before
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Special weather statement, Jul 19, 6:08 PM CDT, 1 hour 27 minutes before
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Local storm report, Jul 19, 6:25 PM CDT, 1 hour 10 minutes before
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Special weather statement, Jul 19, 7:35 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 7:44 PM CDTSpecial Weather StatementLZKSaline46 min
Jul 19, 8:01 PM CDTSpecial Weather StatementLZKNewton44 min
Jul 19, 8:28 PM CDTSpecial Weather StatementLZKSaline47 min
Jul 19, 11:21 PM CDTSpecial Weather StatementLZKNewton44 min
Jul 19, 11:33 PM CDTSpecial Weather StatementLZKOuachita47 min
Jul 20, 12:00 AM CDTSpecial Weather StatementLZKNewton45 min
Jul 20, 4:00 PM CDTSevere Thunderstorm WarningLZKClark, Pike45 min
Jul 20, 4:42 PM CDTSevere Thunderstorm WarningLZKDallas33 min
Jul 20, 5:14 PM CDTSevere Thunderstorm WarningLZKClark, Dallas31 min
Jul 20, 6:08 PM CDTSpecial Weather StatementLZKCalhoun42 min
Jul 20, 6:49 PM CDTSpecial Weather StatementLZKOuachita31 min

Nearby

Special Weather Statements in Arkansas, 2012Every special weather statement 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.