Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 25, NWS Little Rock, AR

March 8, 20115 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Mar 8, 2011, 9:03 PM CST for 5 counties in Arkansas. It was in force for 42 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
Mar 8, 2011, 9:03 PM CST (03:03 UTC)
Expired
Mar 8, 2011, 9:45 PM CST
In force
42 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon

Counties Clark County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Saline County, AR

The radar

The Little Rock radar (KLZK), 76 km from the middle of the area, began a volume at 03:03 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 (KSHV), launched 00:00Z, 3.1 hours before the alert went out and 226 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, Shreveport, LA at 00:00Z on 2011-03-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2021 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, Shreveport, LA at 00:00Z on 2011-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 261 square meters per square second.19395878Sfc1 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
2021 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
557 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
261 m²/s²
0-3 km storm-relative helicity
247 m²/s²
Significant tornado parameter
2.4
Supercell composite
12.7

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 Mar 8, 5:30 PM CST, 3 hours 33 minutes earlier.

Area forecast discussion, Mar 8, 5:30 PM CST, 3 hours 33 minutes before
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Hazardous weather outlook, Mar 8, 10:25 AM CST, 10 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1025 AM CST TUE MAR 8 2011

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-091100-
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-
1025 AM CST TUE MAR 8 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A STORM SYSTEM WILL APPROACH ARKANSAS FROM THE SOUTHERN PLAINS THIS
AFTERNOON AND TONIGHT. AHEAD OF THE SYSTEM...SHOWERS AND SCATTERED
THUNDERSTORMS WILL CONTINUE DEVELOPING...AND SOME STORMS COULD BE
SEVERE.

AS OF LATE THIS MORNING...TEMPERATURES ACROSS THE REGION WERE ONLY
IN THE 40S TO LOWER 50S. WARMTH AND MOISTURE WAS TRYING TO INCREASE
FROM THE GULF COAST...BUT WAS HAVING SOME DIFFICULTY.

THROUGH THIS AFTERNOON...WARMTH AND MOISTURE WILL TEND TO RIDE OVER
COOLER CONDITIONS IN ARKANSAS...WITH PRECIPITATION FORMING ABOVE
THE COOL LAYER. MEANWHILE...THERE WILL BE FAIRLY DRY AIR ALOFT.
MOISTURE WILL SURGE INTO THIS DRY AIR MASS...WITH SOME EVAPORATION
OCCURRING. THIS WILL CREATE COOLING...AND WILL MAKE IT EASIER FOR
HAIL TO FORM. SOME OF THE HAIL COULD BE QUARTER SIZE OR LARGER.

HEADING INTO TONIGHT...THE CONCERN FOR LARGE HAIL WILL CONTINUE IN
NORTHERN AND CENTRAL ARKANSAS. STORMS IN THESE AREAS WILL REMAIN
ELEVATED...OR ABOVE COOL AIR NEAR THE GROUND. ACROSS THE
SOUTH...SOME WARMING IS EXPECTED. STORMS WILL BE LESS ELEVATED...
MAKING IT EASIER FOR STRONG TO DAMAGING WINDS TO MAKE IT TO THE
GROUND.

AT THIS POINT...IT APPEARS SIGNIFICANT WARMING WILL BE CONFINED TO
ABOUT THE SOUTHERN TWO ROWS OF COUNTIES. IN ADDITION TO A CONCERN
FOR DAMAGING WINDS ACROSS THE FAR SOUTH...WINDS WILL TURN WITH
HEIGHT. THIS WILL MAKE IT POSSIBLE FOR ISOLATED TORNADOES. WARMING
IS MORE OF A GUARANTEE ALONG THE GULF COAST...WITH DAMAGING WINDS
AND TORNADOES MORE LIKELY FROM LOUISIANA INTO MISSISSIPPI.

OTHER THAN SEVERE WEATHER...THERE WILL BE AREAS OF HEAVY
RAIN...ESPECIALLY IN THE EASTERN HALF OF THE STATE. FROM LITTLE ROCK
EASTWARD...RAINFALL TOTALS COULD REACH ONE TO TWO INCHES.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THE SYSTEM IN THE SOUTHERN PLAINS WILL DRAG A COLD FRONT THROUGH THE
REGION. THE FRONT WILL BE EAST OF THE FORECAST AREA BY WEDNESDAY
MORNING. IT WILL BE BREEZY AND COOLER AS HIGH PRESSURE BUILDS BEHIND
THE FRONT.

THE NEXT CHANCE OF PRECIPITATION WILL NOT OCCUR UNTIL SUNDAY NIGHT
AND MONDAY WHEN ANOTHER STORM SYSTEM APPROACHES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON INTO THE OVERNIGHT
HOURS.

&&

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

56/46

In the hours before

Special weather statement, Mar 8, 4:25 PM CST, 4 hours 38 minutes before
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Special weather statement, Mar 8, 4:48 PM CST, 4 hours 15 minutes before
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Special weather statement, Mar 8, 5:02 PM CST, 4 hours 1 minute before
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Special weather statement, Mar 8, 5:47 PM CST, 3 hours 16 minutes before
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Local storm report, Mar 8, 5:52 PM CST, 3 hours 11 minutes before
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Special weather statement, Mar 8, 5:56 PM CST, 3 hours 7 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Mar 8, 6:12 PM CSTSpecial Weather StatementLZKIndependence43 min
Mar 8, 6:12 PM CSTSevere Thunderstorm WarningLZKNewton, Pope, Searcy33 min
Mar 8, 6:15 PM CSTSpecial Weather StatementLZKPrairie45 min
Mar 8, 6:36 PM CSTSpecial Weather StatementLZKPope44 min
Mar 8, 7:04 PM CSTSpecial Weather StatementLZKWoodruff46 min
Mar 8, 7:11 PM CSTSpecial Weather StatementLZKIndependence29 min
Mar 8, 7:14 PM CSTSpecial Weather StatementLZKSearcy41 min
Mar 8, 7:47 PM CSTSpecial Weather StatementLZKMontgomery, Pike58 min
Mar 8, 8:50 PM CSTSpecial Weather StatementLZKClark, Hot Spring60 min
Mar 8, 9:35 PM CSTSevere Thunderstorm WarningLZKPulaski, Saline31 min
Mar 8, 10:01 PM CSTSpecial Weather StatementLZKCalhoun44 min
Mar 9, 3:28 AM CSTLake Wind AdvisoryLZKArkansas, Baxter, Bradley, Calhoun, Clark, Cleburne and 28 more15 hr
Mar 9, 10:50 AM CSTRiver Flood AdvisoryLZKIndependence, Jackson, Lawrence3 days

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.