Alert archive / Arkansas / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 89, NWS Little Rock, AR

April 9, 20154 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Apr 9, 2015, 7:01 PM CDT for 4 counties in Arkansas. It was in force for 29 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 9, 2015, 7:01 PM CDT (00:01 UTC)
Expired: Apr 9, 2015, 7:30 PM CDT
In force: 29 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cleburne County, AR, Jackson County, AR, White County, AR, Woodruff County, AR

The radar

The Little Rock radar (KLZK), 89 km from the middle of the area, began a volume at 00:00 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 9, 3:17 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Little Rock, AR (KBYH), launched 00:00Z, 0.0 hours before the alert went out and 159 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: 928 J/kg
Mixed-layer CIN: -88 J/kg
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 232 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 7.1

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 9, 6:40 PM CDT, 21 minutes earlier.

Area forecast discussion, Apr 9, 6:40 PM CDT, 21 minutes before

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Hazardous weather outlook, Apr 9, 4:00 PM CDT, 3 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LITTLE ROCK AR
400 PM CDT THU APR 9 2015

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-101000-
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-
400 PM CDT THU APR 9 2015

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A STORM SYSTEM IN THE CENTRAL PLAINS CONTINUES TO MOVE EAST AND WILL
DRAG A COLD FRONT INTO ARKANSAS. SHOWERS AND THUNDERSTORMS CONTINUE
TO DEVELOP AND WILL INCREASE THROUGH THE EVENING HOURS.

STORMS THAT BECOME SEVERE WILL BE CAPABLE OF PRODUCING DAMAGING
STRAIGHT LINE WINDS...LARGE HAIL AND ISOLATED TORNADOES. THE BEST
CHANCES OF TORNADOES WILL BE OVER SOUTHEAST ARKANSAS.

THERE WILL BE A LOT OF MOISTURE AVAILABLE...WHICH WILL MAKE STORMS
MORE EFFICIENT RAINMAKERS. ONE TO TWO INCH AMOUNTS ARE POSSIBLE
SOUTH OF LITTLE ROCK.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE FRONT WILL EXIT THE REGION TOWARD THE GULF COAST ON FRIDAY...
BUT WILL MOVE BACK TO THE NORTH LATE IN THE WEEKEND. THE RETURN OF
THE FRONT WILL RESULT IN MORE SHOWERS AND THUNDERSTORMS SUNDAY NIGHT
AND MONDAY...AND THE POSSIBILITY OF HEAVY TO EXCESSIVE RAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NECESSARY TODAY...ESPECIALLY THIS
AFTERNOON AND EVENING.

&&

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

46/56

In the hours before

Special weather statement, Apr 9, 5:35 PM CDT, 1 hour 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
535 PM CDT THU APR 9 2015

ARZ063-064-067>069-092320-
BRADLEY AR-CALHOUN AR-CLEVELAND AR-DREW AR-LINCOLN AR-
535 PM CDT THU APR 9 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN LINCOLN...DREW...
SOUTHEASTERN CLEVELAND...SOUTHEASTERN CALHOUN AND BRADLEY COUNTIES
UNTIL 615 PM CDT...

AT 534 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 2 MILES EAST OF
WEEKS TO 4 MILES NORTHEAST OF HERMITAGE TO 4 MILES NORTH OF MORO
BAY...AND MOVING EAST AT 35 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
  WARREN...             MONTICELLO...         WILMAR...
  WEEKS...              PLANTERSVILLE...      MORO BAY...
  MORO BAY STATE PARK...                      LANARK...
  LAKE MONTICELLO...    LADELLE...            INGALLS...
  HILO...               HERMITAGE...          HARRELL...
  GREEN HILL...         BRANDON...            VICK...
  VALLEY...

THESE STORMS MAY INTENSIFY....AND A TORNADO WATCH IS IN EFFECT FOR
THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS
WELL AS LOCAL CABLE TV OUTLETS....FOR ADDITIONAL INFORMATION AND
POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY...TURN AROUND DONT DROWN!

LAT...LON 3320 9219 3321 9223 3325 9224 3327 9230
      3325 9232 3328 9236 3327 9243 3332 9248
      3332 9253 3378 9229 3388 9159 3342 9155
      3338 9159 3339 9197 3331 9197 3321 9208
      3320 9213 3317 9212 3315 9216
TIME...MOT...LOC 2235Z 279DEG 29KT 3367 9216 3350 9213
          3336 9235

62

Local storm report, Apr 9, 5:52 PM CDT, 1 hour 9 minutes before

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Local storm report, Apr 9, 6:07 PM CDT, 54 minutes before

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Local storm report, Apr 9, 6:24 PM CDT, 37 minutes before

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Local storm report, Apr 9, 6:37 PM CDT, 24 minutes before

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Local storm report, Apr 9, 6:59 PM CDT, 2 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 9, 7:13 PM CDT	Special Weather Statement	LZK	Desha	47 min
Apr 9, 7:16 PM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Independence	29 min
Apr 9, 7:39 PM CDT	Flash Flood Warning	LZK	Bradley, Calhoun, Drew, Ouachita	3 hr
Apr 9, 7:49 PM CDT	Special Weather Statement	LZK	Lawrence	21 min
Apr 9, 7:57 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Faulkner, Garland, Perry, Pulaski, Saline	33 min
Apr 9, 8:06 PM CDT	Special Weather Statement	LZK	Cleburne, Stone	29 min
Apr 9, 8:29 PM CDT	Special Weather Statement	LZK	Sharp	16 min
Apr 9, 8:50 PM CDT	Special Weather Statement	LZK	Cleburne, Independence	45 min
Apr 9, 9:15 PM CDT	Flash Flood Warning	LZK	Cleburne, Independence, Jackson, Sharp, Stone, White	105 min
Apr 9, 9:26 PM CDT	Severe Thunderstorm Warning	LZK	Independence, Jackson	34 min
Apr 9, 10:12 PM CDT	Flash Flood Warning	LZK	Bradley, Calhoun, Desha, Drew, Ouachita	108 min
Apr 9, 11:35 PM CDT	Flash Flood Warning	LZK	Arkansas, Dallas, Grant, Jefferson	3 hr
Apr 10, 1:45 AM CDT	Flash Flood Warning	LZK	Bradley, Drew	105 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2015 Every severe thunderstorm warning in 2015

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.