Alert archive / Arkansas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 235, NWS Little Rock, AR

July 14, 2012Logan County, Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Jul 14, 2012, 2:14 PM CDT for Logan County, Arkansas. It was in force for 12 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 14, 2012, 2:14 PM CDT (19:14 UTC)
Expired
Jul 14, 2012, 2:26 PM CDT
In force
12 min
Issued by
NWS Little Rock, AR
Area
Storm-based polygon

County Logan County, AR

The radar

The Western Arkansas radar (KSRX), 59 km from the middle of the area, began a volume at 19:17 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

Norman, OK (KOUN), launched 12:00Z, 7.2 hours before the alert went out and 335 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, Norman, OK at 12:00Z on 2012-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 932 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, Norman, OK at 12:00Z on 2012-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 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
932 J/kg
Mixed-layer CIN
-183 J/kg
Mixed-layer LCL
1416 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
48 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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 14, 1:30 PM CDT, 44 minutes earlier.

Area forecast discussion, Jul 14, 1:30 PM CDT, 44 minutes before
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Hazardous weather outlook, Jul 14, 10:55 AM CDT, 3 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
1055 AM CDT SAT JUL 14 2012

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-151000-
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-
1055 AM CDT SAT JUL 14 2012

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS WILL OCCUR TODAY AND
TONIGHT...AS UPPER LEVEL LOW PRESSURE MOVES THROUGH THE REGION.
WHILE WIDESPREAD SEVERE WEATHER IS NOT ANTICIPATED...THERE COULD BE
SOME STRONG STORMS...PRODUCING WIND GUSTS TO 40 MPH...SMALL
HAIL...FREQUENT LIGHTNING...AND LOCALLY HEAVY DOWNPOURS.

EVEN WITH RAINFALL IN THE FORECAST...EXTREME WILDFIRE DANGER
CONTINUES ACROSS THE NATURAL STATE...AND MOST COUNTIES HAVE BURN
BANS IN PLACE. ANY FIRE THAT STARTS COULD SPREAD RAPIDLY AND QUICKLY
GET OUT OF CONTROL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

SHOWER AND THUNDERSTORM CHANCES WILL CONTINUE THROUGH THE WEEKEND
AND INTO NEXT WEEK...AS MOISTURE INTERACTS WITH DISTURBANCES MOVING
THROUGH IN THE FLOW ALOFT. WHILE WIDESPREAD SEVERE WEATHER IS NOT
ANTICIPATED...AN ISOLATED STRONG STORM WILL BE POSSIBLE.

WHATEVER RAIN MATERIALIZES...IT WILL LIKELY HAVE LITTLE IMPACT ON
THE ONGOING DROUGHT. OUTDOOR BURNING OF ANY KIND IS STRONGLY
DISCOURAGED.

.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.

28

In the hours before

Special weather statement, Jul 14, 9:46 AM CDT, 4 hours 28 minutes before
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Special weather statement, Jul 14, 9:54 AM CDT, 4 hours 20 minutes before
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Local storm report, Jul 14, 9:57 AM CDT, 4 hours 17 minutes before
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Special weather statement, Jul 14, 10:49 AM CDT, 3 hours 25 minutes before
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Special weather statement, Jul 14, 11:39 AM CDT, 2 hours 35 minutes before
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Special weather statement, Jul 14, 1:30 PM CDT, 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
130 PM CDT SAT JUL 14 2012

ARZ030-037-141900-
LOGAN AR-SCOTT AR-
130 PM CDT SAT JUL 14 2012

...SIGNIFICANT WEATHER ADVISORY FOR EXTREME NORTHERN SCOTT AND
WESTERN LOGAN COUNTIES UNTIL 200 PM CDT...

AT 128 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 3 MILES SOUTH OF BRANCH...OR 9 MILES NORTH OF
BOONEVILLE...MOVING SOUTHWEST AT 15 MPH.

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

* LOCATIONS IMPACTED INCLUDE...
  BOONEVILLE...         RATCLIFF...           ECHO...
  IONE...               CHISMVILLE...         CAULKSVILLE...
  CAROLAN...            BARBER...             WATSON LAKE...
  TATE...               HEWITT LAKE...        CANEY LAKE...
  BOY SCOUTS LAKE...

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

LAT...LON 3511 9415 3515 9414 3515 9404 3523 9404
      3524 9402 3524 9393 3532 9392 3533 9390
      3531 9383 3501 9396 3510 9418
TIME...MOT...LOC 1830Z 023DEG 13KT 3526 9398

58

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 9:54 AM CDTSpecial Weather StatementLZKBaxter, Boone, Marion, Newton, Searcy56 min
Jul 14, 10:49 AM CDTSpecial Weather StatementLZKNewton46 min
Jul 14, 11:39 AM CDTSpecial Weather StatementLZKJohnson, Van Buren46 min
Jul 14, 1:30 PM CDTSpecial Weather StatementLZKSebastian30 min
Jul 14, 1:50 PM CDTSevere Thunderstorm WarningLZKLogan25 min
Jul 14, 5:44 PM CDTSpecial Weather StatementLZKCleveland46 min
Jul 14, 6:01 PM CDTSevere Thunderstorm WarningLZKCleveland, Jefferson44 min
Jul 14, 6:28 PM CDTSevere Thunderstorm WarningLZKCleveland, Jefferson, Lincoln38 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2012Every 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.