Alert archive / Arkansas / Flash Flood Warnings in 2004

Flash Flood Warning 11, NWS Little Rock, AR

April 22, 2004Johnson County, Arkansas

NWS Little Rock, AR issued this flash flood warning at Apr 22, 2004, 12:12 AM CDT for Johnson 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: Apr 22, 2004, 12:12 AM CDT (05:12 UTC)
Expired: Apr 22, 2004, 3:10 AM CDT
In force: 3 hr
Issued by: NWS Little Rock, AR
Area: Counties, with a storm outline in the text

County Johnson County, AR

The radar

The Western Arkansas radar (KSRX), 87 km from the middle of the area, began a volume at 05:12 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, 5.2 hours before the alert went out and 151 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: 91 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1996 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 152 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 Apr 21, 9:30 PM CDT, 2 hours 42 minutes earlier.

Area forecast discussion, Apr 21, 9:30 PM CDT, 2 hours 42 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
930 PM CDT WED APR 21 2004

.DISCUSSION...
QUICK UPDATE TO REMOVE TORNADO WATCH. MAIN THREAT OF SEVERE
THUNDERSTORMS HAS DIMINISHED...HOWEVER FLOODING WILL BE THE NEXT
CONCERN. REPORTS OF FLOODING ALREADY RECEIVED IN FAULKNER AND WHITE
COUNTIES...AS WELL AS THE LITTLE ROCK METRO AREA EARLIER THIS
AFTERNOON. WITH THE NEXT SYSTEM APPROACHING FOR THURSDAY
NIGHT...THERE IS A POSSIBILITY FOR ANOTHER ROUND OF FLOODING. WILL
CONTINUE TO EVALUATE FOR POTENTIAL FLASH FLOOD WATCH FOR THE NORTH.
&&

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

58

Hazardous weather outlook, Apr 21, 9:50 PM CDT, 2 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
950 PM CDT WED APR 21 2004

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-221000-
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-
950 PM CDT WED APR 21 2004

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

.DAY ONE...TONIGHT

SCATTERED TO NUMEROUS SHOWERS...WITH ISOLATED THUNDERSTORMS...WILL
CONTINUE OVER THE NORTHERN TWO THIRDS OF ARKANSAS OVERNIGHT. A
STALLED FRONTAL BOUNDARY OVER CENTRAL ARKANSAS WILL ACT AS A
FOCUSING MECHANISM FOR STORM DEVELOPMENT. WITH ABUNDANT MOISTURE IN
THE AREA...HEAVY RAINFALL IS A CONCERN...ESPECIALLY OVER NORTHERN
ARKANSAS. ONE TO TWO INCHES OF RAIN MAY OCCUR...WITH LOCALLY HEAVIER
AMOUNTS. ISOLATED SEVERE STORMS ARE POSSIBLE THROUGH MIDNIGHT...BUT
WILL DIMINISH IN THE EARLY MORNING HOURS.

IN SOUTHERN ARKANSAS...THUNDERSTORMS WILL BE MORE ISOLATED WITH LESS
OF A POTENTIAL FOR SEVERE WEATHER AND HEAVY RAIN. HOWEVER...ISOLATED
SEVERE STORMS MAY STILL OCCUR...WITH MAINLY LARGE HAIL POSSIBLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

STORMS THAT DEVELOP TONIGHT WILL EXIT THE STATE INTO MISSOURI
THURSDAY MORNING. THERE WILL BE ANOTHER LULL THURSDAY
AFTERNOON...WITH MORE STORMS IN THE FORECAST THURSDAY NIGHT.

THE WEATHER PATTERN WILL NOT CHANGE THROUGH AT LEAST SATURDAY. A
FRONTAL BOUNDARY WILL REMAIN STALLED ACROSS NORTHERN ARKANSAS. GIVEN
THIS...STORMS THAT DEVELOP THE REMAINDER OF THE WEEK WILL BE MOST
LIKELY ACROSS THE NORTHERN HALF OF THE STATE.

THE STORMS THAT ARE EXPECTED WILL OCCUR MAINLY AT NIGHT...WITH
STORMS MENTIONED THURSDAY NIGHT AND FRIDAY NIGHT. SEVERE WEATHER
WILL REMAIN A POSSIBILITY...WITH AREAS OF HEAVY TO EXCESSIVE
RAINFALL. FLASH FLOODING MAY OCCUR IN SOME LOCALES.

THE PATTERN WILL FINALLY CHANGE THIS WEEKEND. A COLD FRONT WILL PUSH
THROUGH THE REGION FROM THE WEST SATURDAY NIGHT AND SUNDAY...WITH
COOLER AND DRIER AIR TO FOLLOW MONDAY AND TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE REQUIRED THROUGH MIDNIGHT IN
NORTHERN AND WESTERN ARKANSAS.

58

In the hours before

Local storm report, Apr 21, 7:19 PM CDT, 4 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
719 PM CDT WED APR 21 2004

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

0712 PM     HAIL             1 NE MAYFLOWER          34.98N 92.41W
04/21/2004  0.75 INCH        FAULKNER           AR   AMATEUR RADIO

&&

28

Local storm report, Apr 21, 7:40 PM CDT, 4 hours 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
740 PM CDT WED APR 21 2004

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

0727 PM     HAIL             7 E MAYFLOWER           34.97N 92.30W
04/21/2004  1.00 INCH        FAULKNER           AR   AMATEUR RADIO

0730 PM     FLASH FLOOD      CONWAY                  35.09N 92.45W
04/21/2004                   FAULKNER           AR   AMATEUR RADIO

            SEVERAL HOUSES FLOODED.

&&

28

Local storm report, Apr 21, 8:03 PM CDT, 4 hours 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
803 PM CDT WED APR 21 2004

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

0750 PM     HAIL             5 N MACON               34.99N 92.17W
04/21/2004  1.00 INCH        PULASKI            AR   TRAINED SPOTTER

            NICKEL TO OCCASIONAL QUARTER SIZE HAIL AT INTERSECTION OF
            HIGHWAYS 89 AND 107.

0759 PM     HAIL             CABOT                   34.97N 92.02W
04/21/2004  0.88 INCH        LONOKE             AR   PUBLIC

&&

28

Local storm report, Apr 21, 8:23 PM CDT, 3 hours 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
823 PM CDT WED APR 21 2004

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

0800 PM     HAIL             3 S EL PASO             35.12N 92.08W
04/21/2004  0.75 INCH        WHITE              AR   FIRE DEPT/RESCUE

&&

28

Local storm report, Apr 21, 8:32 PM CDT, 3 hours 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
832 PM CDT WED APR 21 2004

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

0742 PM     HAIL             6 N CABOT               35.06N 92.02W
04/21/2004  0.75 INCH        LONOKE             AR   FIRE DEPT/RESCUE

&&

28

Local storm report, Apr 21, 9:04 PM CDT, 3 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
904 PM CDT WED APR 21 2004

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

0858 PM     HAIL             2 SE HUNT               35.51N 93.64W
04/21/2004  1.75 INCH        JOHNSON            AR   TRAINED SPOTTER

&&

28

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 7:16 PM CDT	Flash Flood Warning	LZK	Faulkner	3 hr
Apr 21, 7:17 PM CDT	Severe Thunderstorm Warning	LZK	Faulkner, Pulaski	43 min
Apr 21, 7:57 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, White	43 min
Apr 21, 8:19 PM CDT	Flash Flood Warning	LZK	White	116 min
Apr 21, 8:46 PM CDT	Severe Thunderstorm Warning	LZK	Johnson	29 min
Apr 21, 8:59 PM CDT	Severe Thunderstorm Warning	LZK	Prairie	31 min
Apr 21, 9:04 PM CDT	Severe Thunderstorm Warning	LZK	Lincoln	46 min
Apr 21, 9:13 PM CDT	Severe Thunderstorm Warning	LZK	Johnson	47 min
Apr 21, 10:23 PM CDT	Flash Flood Warning	LZK	Faulkner, White, Woodruff	3 hr
Apr 22, 12:28 AM CDT	Flash Flood Warning	LZK	Conway, Pope	3 hr
Apr 22, 12:44 AM CDT	Flash Flood Warning	LZK	Logan	3 hr
Apr 22, 1:45 AM CDT	Severe Thunderstorm Warning	LZK	Yell	35 min
Apr 22, 2:45 AM CDT	Severe Thunderstorm Warning	LZK	Scott	30 min
Apr 22, 3:28 AM CDT	Flash Flood Warning	LZK	Scott, Yell	2 hr
Apr 22, 3:30 AM CDT	Flash Flood Warning	LZK	Conway, Perry	2 hr
Apr 22, 3:43 AM CDT	Severe Thunderstorm Warning	LZK	Yell	42 min
Apr 22, 5:54 AM CDT	Flash Flood Warning	LZK	Faulkner, Perry, White, Yell	2 hr
Apr 22, 6:09 AM CDT	Flash Flood Warning	LZK	Scott	111 min

Nearby

Flash Flood Warnings in Arkansas, 2004 Every flash flood warning in 2004

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.