Alert archive / Arkansas / Flash Flood Warnings in 2008

Flash Flood Warning 37, NWS Little Rock, AR

March 31, 2008Logan County, Yell County, Arkansas

NWS Little Rock, AR issued this flash flood warning at Mar 31, 2008, 6:49 PM CDT for Logan County, Yell 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: Mar 31, 2008, 6:49 PM CDT (23:49 UTC)
Expired: Mar 31, 2008, 9:45 PM CDT
In force: 3 hr
Issued by: NWS Little Rock, AR
Area: Storm-based polygon
Flood severity: None

Counties Logan County, AR, Yell County, AR

The radar

The Western Arkansas radar (KSRX), 75 km from the middle of the area, began a volume at 23:52 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 12:00Z, 11.8 hours before the alert went out and 200 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: 640 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 596 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 336 m²/s²
0-3 km storm-relative helicity: 354 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 10.7

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 Mar 31, 6:37 PM CDT, 12 minutes earlier.

Area forecast discussion, Mar 31, 6:37 PM CDT, 12 minutes before

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Hazardous weather outlook, Mar 31, 2:50 PM CDT, 3 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
250 PM CDT MON MAR 31 2008

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-011000-
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-
250 PM CDT MON MAR 31 2008

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

EXCESSIVE RUNOFF FROM HEAVY RAIN LAST WEEK WILL CONTINUE TO CAUSE
FLOODING OF RIVERS...STREAMS AND LOW WATER CROSSINGS...MAINLY IN
EASTERN ARKANSAS. THIS INCLUDES THE BLACK RIVER...THE LOWER WHITE
RIVER AND THE CACHE RIVER.

A COLD FRONT OVER THE SOUTHERN PLAINS WILL MOVE INTO ARKANSAS THIS
AFTERNOON AND EVENING...AND INTERACT WITH THE MOISTURE OVER THE
STATE. WITH PLENTIFUL MOISTURE OVER THE STATE...THE POTENTIAL FOR
LOCALLY HEAVY RAINFALL WILL EXIST. WITH THE GROUND STILL SATURATED
FROM RECENT RAINS...IT WILL NOT TAKE MUCH RAIN FOR FLASH FLOODING TO
OCCUR. AS SUCH...A FLASH FLOOD WATCH IS IN EFFECT FOR THE NORTHERN
TWO THIRDS OF THE STATE.

SEVERE WEATHER WILL BE POSSIBLE THIS AFTERNOON THROUGH TONIGHT AS
THE COLD FRONT MOVES THROUGH THE AREA. STRONG TO SEVERE
THUNDERSTORMS WILL BE POSSIBLE WITH DAMAGING WINDS AND LARGE HAIL
THE PRIMARY CONCERNS. HOWEVER...THERE IS SOME TURNING OF WIND WITH
HEIGHT...WITH ISOLATED TORNADOES POSSIBLE. THE AREA UNDER MOST
CONCERN WILL BE THE WESTERN HALF OF THE STATE. HOWEVER...SEVERE
WEATHER WILL BE POSSIBLE ACROSS THE ENTIRE STATE LATER TONIGHT.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

FLOODING WILL CONTINUE FOR SEVERAL MORE DAYS ALONG THE BLACK AND
CACHE RIVERS...AND THE LOWER REACHES OF THE WHITE RIVER.

ANOTHER COLD FRONT IS EXPECTED TO PASS THROUGH THE AREA THURSDAY AND
THURSDAY NIGHT. SEVERE WEATHER LOOKS POSSIBLE WITH THE PASSAGE OF
THIS COLD FRONT THURSDAY AFTERNOON. THE MAIN CONCERN AT THIS TIME IS
DAMAGING WINDS...HAIL AND FLASH FLOODING. THIS POTENTIAL SEVERE
WEATHER EVENT IS STILL SEVERAL DAYS OUT BUT WILL BE MONITORED
CLOSELY OVER THE NEXT FEW DAYS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND TONIGHT.

&&

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

58

In the hours before

Local storm report, Mar 31, 6:22 PM CDT, 27 minutes before

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Local storm report, Mar 31, 6:23 PM CDT, 26 minutes before

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Local storm report, Mar 31, 6:29 PM CDT, 20 minutes before

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Local storm report, Mar 31, 6:36 PM CDT, 13 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
Mar 31, 12:27 PM CDT	River Flood Advisory	LZK	Fulton, Sharp	19 hr
Mar 31, 12:27 PM CDT	River Flood Advisory	LZK	Lawrence, Randolph	19 hr
Mar 31, 12:27 PM CDT	River Flood Advisory	LZK	Randolph	19 hr
Mar 31, 4:13 PM CDT	Severe Thunderstorm Warning	LZK	Boone	47 min
Mar 31, 4:20 PM CDT	Flash Flood Warning	LZK	Boone, Newton	4 hr
Mar 31, 4:44 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Marion	46 min
Mar 31, 5:35 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Fulton	40 min
Mar 31, 5:55 PM CDT	Severe Thunderstorm Warning	LZK	Johnson, Logan, Pope, Scott, Yell	65 min
Mar 31, 5:58 PM CDT	Flash Flood Warning	LZK	Baxter, Marion	3 hr
Mar 31, 6:08 PM CDT	Flash Flood Warning	LZK	Searcy	4 hr
Mar 31, 6:19 PM CDT	Severe Thunderstorm Warning	LZK	Fulton, Sharp	56 min
Mar 31, 6:30 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Marion, Searcy	45 min
Mar 31, 6:31 PM CDT	Severe Thunderstorm Warning	LZK	Polk	59 min
Mar 31, 6:32 PM CDT	Flash Flood Warning	LZK	Fulton	4 hr

Nearby

Flash Flood Warnings in Arkansas, 2008 Every flash flood warning in 2008

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.