Alert archive / Arkansas / Flash Flood Warnings in 2011

Flash Flood Warning 114, NWS Little Rock, AR

June 21, 2011Scott County, Arkansas

NWS Little Rock, AR issued this flash flood warning at Jun 21, 2011, 10:27 PM CDT for Scott County, Arkansas. It was in force for 3 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: Jun 21, 2011, 10:27 PM CDT (03:27 UTC)
Expired: Jun 22, 2011, 1:30 AM CDT
In force: 3 hr
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Flood severity: None

County Scott County, AR

The radar

The Western Arkansas radar (KSRX), 55 km from the middle of the area, began a volume at 03:27 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

Springfield, MO (KSGF), launched 00:00Z, 3.5 hours before the alert went out and 228 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: 174 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 1626 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Jun 21, 8:30 PM CDT, 1 hour 57 minutes earlier.

Area forecast discussion, Jun 21, 8:30 PM CDT, 1 hour 57 minutes before

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Hazardous weather outlook, Jun 21, 8:00 PM CDT, 2 hours 27 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE LITTLE ROCK AR
800 PM CDT TUE JUN 21 2011

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-221015-
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-
800 PM CDT TUE JUN 21 2011

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

.DAY ONE...TODAY AND TONIGHT

A COLD FRONT WILL SLOWLY SAG INTO ARKANSAS TONIGHT...AND DEVELOP
SCATTERED SHOWERS AND THUNDERSTORMS. A FEW ISOLATED STRONG TO SEVERE
STORMS WILL BE POSSIBLE...WITH DAMAGING WINDS AND LARGE HAIL THE
PRIMARY CONCERNS. THE THREAT OF SEVERE STORMS IS EXPECTED TO LOWER
AFTER MIDNIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

ONCE THE COLD FRONT MOVES INTO THE STATE IT WILL MEANDER ABOUT
ARKANSAS THROUGH THE END OF THE WEEK. THIS WILL ACT AS A TRIGGERING
MECHANISM FOR MAINLY AFTERNOON SHOWERS AND THUNDERSTORMS EACH DAY.
THE OVERALL THREAT FOR ANY SEVERE STORMS WILL BE QUITE LOW...WITH
ONLY AN ISOLATED PULSE STRONG TO SEVERE STORM POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED TONIGHT DUE TO THE LIMITED
POTENTIAL FOR SEVERE STORMS.

&&

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

59

In the hours before

Special weather statement, Jun 21, 6:37 PM CDT, 3 hours 50 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
637 PM CDT TUE JUN 21 2011

ARZ037-220020-
SCOTT AR-
637 PM CDT TUE JUN 21 2011

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN SCOTT COUNTY UNTIL 715 PM
CDT...

AT 635 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR WEEKS...OR 9 MILES SOUTH OF HARTFORD.  THIS
STORM WAS NEARLY STATIONARY.

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

* LOCATIONS IMPACTED INCLUDE...
  OLIVER...             MORGAN SPRINGS...     LAKE HINKLE...
  BEAUCHAMP...          CAUTHRON...           BATES...
  WEEKS...              WALKER MTN...
  LITTLE PINES REC AREA...                    GIPSON...
  COALDALE...           BRAWLEY...

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

LAT...LON 3495 9439 3496 9437 3496 9431 3497 9428
      3497 9424 3499 9423 3499 9420 3479 9424
      3481 9446 3492 9446
TIME...MOT...LOC 2337Z 280DEG 2KT 3489 9440

58

Local storm report, Jun 21, 8:33 PM CDT, 1 hour 54 minutes before

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Local storm report, Jun 21, 9:13 PM CDT, 1 hour 14 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
Jun 21, 7:29 PM CDT	Severe Thunderstorm Warning	LZK	Scott	46 min
Jun 21, 7:31 PM CDT	Flash Flood Warning	LZK	Scott	3 hr
Jun 21, 8:26 PM CDT	Severe Thunderstorm Warning	LZK	Polk, Scott	49 min
Jun 21, 8:48 PM CDT	Severe Thunderstorm Warning	LZK	Montgomery, Polk, Scott	42 min
Jun 22, 11:08 AM CDT	River Flood Advisory	LZK	Arkansas, Monroe	36 hr

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.