Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 117, NWS Little Rock, AR

July 4, 20115 counties in Arkansas

NWS Little Rock, AR issued this flash flood warning at Jul 4, 2011, 4:58 PM CDT for 5 counties in Arkansas. It was in force for 2 hr. 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 4, 2011, 4:58 PM CDT (21:58 UTC)
Expired: Jul 4, 2011, 7:00 PM CDT
In force: 2 hr
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Flood severity: None

Counties Arkansas County, AR, Cleveland County, AR, Desha County, AR, Drew County, AR, Lincoln County, AR

The radar

The Little Rock radar (KLZK), 117 km from the middle of the area, began a volume at 22:00 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 nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 10.0 hours before the alert went out and 187 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: 1502 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 1238 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 119 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 flash flood 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 flash flood warning went out at Jul 4, 3:02 PM CDT, 1 hour 56 minutes earlier.

Area forecast discussion, Jul 4, 3:02 PM CDT, 1 hour 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LITTLE ROCK AR
302 PM CDT MON JUL 4 2011

.SHORT TERM...TONIGHT THROUGH THURSDAY NIGHT
LATEST OBSERVATIONS INDICATE THAT THE STRONGEST CONCENTRATION OF
CONVECTION EXTENDS FROM NEAR MENA...TO NEAR LAKE OUACHITA...IN AN
AREA OF STRONGEST...YET MODEST LOW LEVEL FORCING. SLOW MOVING
CELLS...CELL MERGERS...AND A MOIST ATMOSPHERIC COLUMN HAS PROMOTED
EFFICIENT RAINFALL PRODUCING STORMS. THIS ACTIVITY IS EXPECTED TO
SLOWLY DECREASE THROUGH 00Z...THEN MORE QUICKLY DIMINISH SHORTLY
AFTER SUNSET.

EXPECT SIMILAR CONVECTIVE DEVELOPMENT FOR THE NEXT SEVERAL DAYS.
WEAK NORTHWESTERLY FLOW...MOIST CONDITIONS...AND MODERATE SURFACE
BASED INSTABILITY PROMOTE SCATTERED...DIURNALLY ENHANCED...
MULTICELLUAR CONVECTION.

&&

.LONG TERM...FRIDAY THROUGH MONDAY
VERY FEW CHGS WERE MADE TO THE GOING FCST FOR DURG THE LONG TERM.
MODELS RMN IN FAIRLY GOOD AGREEMENT WITH OVERALL TRENDS HEADING INTO
NEXT WEEKEND. THE UPR RDG...CURRENTLY CENTERED OVR THE CNTRL
ROCKIES...WL SHIFT EWD ONCE AGAIN AND BLD INTO THE REGION DURG THE
PD. BASICALLY LOOKING AT A CONTD SUMMERTIME PATTERN LIKE WE HAVE
SEEN RECENTLY...WITH HIGHS IN THE 90S AND LOWS MAINLY IN THE 70S.
CONTD TO MENTION LOW CHC POPS MOST DAYS...WITH MAINLY A DIURNAL
TREND EXPECTED.
&&

.PRELIMINARY POINT TEMPS/POPS...
BATESVILLE AR     72  95  69  94 /  40  20  20  10
CAMDEN AR         72  97  69  97 /  40  30  30  20
HARRISON AR       69  93  66  93 /  30  20  20  10
HOT SPRINGS AR    72  97  69  96 /  40  20  20  20
LITTLE ROCK   AR  72  96  71  96 /  40  20  30  20
MONTICELLO AR     72  97  71  96 /  40  30  30  30
MOUNT IDA AR      71  97  69  96 /  40  20  20  10
MOUNTAIN HOME AR  71  94  66  93 /  40  20  20  10
NEWPORT AR        73  95  71  94 /  40  20  20  10
PINE BLUFF AR     73  97  72  96 /  40  30  30  20
RUSSELLVILLE AR   71  95  69  95 /  40  20  20  10
SEARCY AR         72  96  71  95 /  40  20  20  20
STUTTGART AR      73  96  73  95 /  40  30  30  20
&&

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

SHORT TERM...55 / LONG TERM...44

Hazardous weather outlook, Jul 4, 1:01 PM CDT, 3 hours 57 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LITTLE ROCK AR
101 PM CDT MON JUL 4 2011

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-
101 PM CDT MON JUL 4 2011

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

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON
AND EVENING. WHILE WIDESPREAD SEVERE WEATHER IS NOT EXPECTED...A FEW
STORMS ARE EXPECTED TO APPROACH SEVERE LIMITS. BRIEF...DAMAGING WIND
GUSTS CAN BE EXPECTED WITH THE STRONGEST STORMS.

THE SLOW MOVEMENT OF THESE STORMS...ACTING ON ABUNDANT
MOISTURE...WILL ALLOW FOR AREAS OF LOCALIZED...HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

ISOLATED AND SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE
OVER THE NEXT SEVERAL DAYS...MAINLY DURING THE AFTERNOON AND EARLY
EVENING HOURS EACH DAY. WHILE WIDESPREAD AND ORGANIZED SEVERE
WEATHER IS NOT EXPECTED AT THIS TIME...ANY STORM THAT DOES FORM COULD
BECOME STRONG TO SEVERE. THE MAIN THREAT WITH ANY SEVERE STORM
WILL BE HIGH WINDS.

WITH TEMPERATURES REMAINING IN THE 90S TO AROUND 100...AND WITH
HUMIDITY LEVELS REMAIN ELEVATED...HEAT INDEX VALUES WILL ALSO REMAIN
HIGH. EXPECT AFTERNOON HEAT INDICES TO RANGE FROM THE UPPER 90S TO
AROUND 105 DURING THE PEAK HEAT OF THE AFTERNOON EACH DAY.

.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.

55

In the hours before

Local storm report, Jul 4, 3:25 PM CDT, 1 hour 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
325 PM CDT MON JUL 04 2011

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

0220 PM     TSTM WND DMG     BONNERDALE              34.38N 93.38W
07/04/2011                   HOT SPRING         AR   PUBLIC

            ESTIMATED 50-60 MPH WINDS HAVE BLOWN DOWN SEVERAL SMALL
            TREES.

&&

57

Special weather statement, Jul 4, 3:28 PM CDT, 1 hour 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
328 PM CDT MON JUL 4 2011

ARZ042-042115-
GARLAND AR-
328 PM CDT MON JUL 4 2011

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL GARLAND COUNTY UNTIL 415
PM CDT...

AT 323 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR BLOWOUT MTN...OR 5 MILES NORTH OF HOT
SPRINGS...MOVING SOUTHWEST AT 5 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

* LOCATIONS IMPACTED INCLUDE...
  MOUNTAIN PINE...      MOUNTAIN VALLEY...    RICKS LAKE...
  OZARK LITHIA...       NORTH MTN...          HAWES...
  BLOWOUT MTN...

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

LAT...LON 3450 9300 3456 9319 3468 9306 3461 9293
TIME...MOT...LOC 2028Z 026DEG 6KT 3456 9304

64

Special weather statement, Jul 4, 3:53 PM CDT, 1 hour 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
353 PM CDT MON JUL 4 2011

ARZ063-064-042140-
CLEVELAND AR-LINCOLN AR-
353 PM CDT MON JUL 4 2011

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN LINCOLN AND EASTERN
CLEVELAND COUNTIES UNTIL 445 PM CDT...

AT 349 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 6 MILES EAST OF TOLEDO...OR 8 MILES EAST OF
RISON...MOVING EAST AT 15 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

* LOCATIONS IMPACTED INCLUDE...
  HERBINE...            FEENYVILLE...         ROWELL...
  PALMYRA...            GLENDALE...           CORNERVILLE...
  CALMER...             STAR CITY MUNI ARPT...
  GLOVER LAKE...        BRANCHVILLE...

THIS STORM MAY INTENSIFY...SO 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 3398 9196 3402 9188 3385 9184 3379 9212
      3399 9214
TIME...MOT...LOC 2053Z 248DEG 12KT 3392 9204

/44

Local storm report, Jul 4, 4:19 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
419 PM CDT MON JUL 04 2011

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

0355 PM     TSTM WND DMG     MALVERN                 34.37N 92.82W
07/04/2011                   HOT SPRING         AR   LAW ENFORCEMENT

            TREE LIMBS AND POWER LINES WERE BLOWN DOWN.

&&

57

Special weather statement, Jul 4, 4:29 PM CDT, 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
429 PM CDT MON JUL 4 2011

ARZ062-042215-
DALLAS AR-
429 PM CDT MON JUL 4 2011

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN DALLAS COUNTY UNTIL 515
PM CDT...

AT 422 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 4 MILES WEST OF WAVE...OR 20 MILES EAST OF
ARKADELPHIA...MOVING SOUTH AT 10 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

* LOCATIONS IMPACTED INCLUDE...
  SPARKMAN...           MANNING...            WAVE...

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

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 3385 9267 3392 9291 3411 9284 3407 9262
TIME...MOT...LOC 2129Z 012DEG 7KT 3400 9275

64

Local storm report, Jul 4, 4:37 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
437 PM CDT MON JUL 04 2011

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

0254 PM     TSTM WND DMG     3 S CADDO VALLEY        34.14N 93.07W
07/04/2011                   CLARK              AR   PUBLIC

            TREES DOWN BETWEEN CADDO VALLEY AND ARKADELPHIA.

&&

57

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 9:45 PM CDT	Special Weather Statement	LZK	Baxter, Boone, Marion	45 min
Jul 4, 12:45 PM CDT	Special Weather Statement	LZK	Pike	60 min
Jul 4, 1:22 PM CDT	Severe Thunderstorm Warning	LZK	Montgomery, Pike	38 min
Jul 4, 1:35 PM CDT	Special Weather Statement	LZK	Clark	45 min
Jul 4, 1:44 PM CDT	Special Weather Statement	LZK	Polk	46 min
Jul 4, 1:52 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Hot Spring	38 min
Jul 4, 1:59 PM CDT	Special Weather Statement	LZK	Montgomery	46 min
Jul 4, 2:01 PM CDT	Special Weather Statement	LZK	Faulkner	44 min
Jul 4, 2:07 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Hot Spring, Montgomery, Pike	23 min
Jul 4, 2:08 PM CDT	Flash Flood Warning	LZK	Clark, Hot Spring, Montgomery, Pike, Polk	112 min
Jul 4, 2:09 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Faulkner, Perry	51 min
Jul 4, 2:11 PM CDT	Severe Thunderstorm Warning	LZK	Polk, Scott	49 min
Jul 4, 2:24 PM CDT	Special Weather Statement	LZK	Dallas	46 min
Jul 4, 2:30 PM CDT	Severe Thunderstorm Warning	LZK	Clark	45 min
Jul 4, 2:32 PM CDT	Special Weather Statement	LZK	Jefferson	43 min
Jul 4, 2:41 PM CDT	Special Weather Statement	LZK	Montgomery	44 min
Jul 4, 2:46 PM CDT	Flash Flood Warning	LZK	Clark, Garland, Hot Spring, Montgomery, Pike, Polk and 1 more	2 hr
Jul 4, 2:46 PM CDT	Severe Thunderstorm Warning	LZK	Cleveland, Jefferson, Lincoln	44 min
Jul 4, 2:53 PM CDT	Special Weather Statement	LZK	Faulkner	47 min
Jul 4, 2:57 PM CDT	Special Weather Statement	LZK	Dallas	48 min
Jul 4, 3:05 PM CDT	Severe Thunderstorm Warning	LZK	Garland, Saline	25 min
Jul 4, 3:10 PM CDT	Special Weather Statement	LZK	Cleveland	45 min
Jul 4, 3:12 PM CDT	Severe Thunderstorm Warning	LZK	Cleveland, Grant, Jefferson	48 min
Jul 4, 3:17 PM CDT	Special Weather Statement	LZK	Hot Spring	43 min
Jul 4, 3:19 PM CDT	Special Weather Statement	LZK	Hot Spring	46 min
Jul 4, 3:23 PM CDT	Special Weather Statement	LZK	Calhoun	47 min
Jul 4, 3:26 PM CDT	Severe Thunderstorm Warning	LZK	Garland, Hot Spring	49 min
Jul 4, 3:28 PM CDT	Special Weather Statement	LZK	Garland	47 min
Jul 4, 3:46 PM CDT	Severe Thunderstorm Warning	LZK	Garland, Saline	29 min
Jul 4, 3:48 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Jefferson	42 min
Jul 4, 3:51 PM CDT	Severe Thunderstorm Warning	LZK	Hot Spring	39 min
Jul 4, 3:53 PM CDT	Special Weather Statement	LZK	Cleveland	47 min
Jul 4, 3:58 PM CDT	Severe Thunderstorm Warning	LZK	Desha	47 min
Jul 4, 3:58 PM CDT	Severe Thunderstorm Warning	LZK	Drew, Lincoln	32 min
Jul 4, 4:16 PM CDT	Severe Thunderstorm Warning	LZK	Desha, Drew, Lincoln	29 min
Jul 4, 4:27 PM CDT	Severe Thunderstorm Warning	LZK	Dallas, Grant, Jefferson	33 min
Jul 4, 4:29 PM CDT	Special Weather Statement	LZK	Dallas	46 min
Jul 4, 4:43 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Desha, Drew, Lincoln	28 min
Jul 4, 4:56 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Jefferson	17 min
Jul 4, 5:17 PM CDT	Special Weather Statement	LZK	Lincoln	48 min

Nearby

Flash Flood Warnings in Arkansas, 2011 Every flash flood 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.