Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 66, NWS Little Rock, AR

April 4, 20114 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Apr 4, 2011, 11:11 AM CDT for 4 counties in Arkansas. It was in force for 34 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 4, 2011, 11:11 AM CDT (16:11 UTC)
Expired: Apr 4, 2011, 11:45 AM CDT
In force: 34 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Arkansas County, AR, Desha County, AR, Drew County, AR, Monroe County, AR

The radar

The Little Rock radar (KLZK), 115 km from the middle of the area, began a volume at 16:13 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 4, 7:22 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 4.2 hours before the alert went out and 155 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: 1771 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 2.5

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 4, 10:37 AM CDT, 34 minutes earlier.

Area forecast discussion, Apr 4, 10:37 AM CDT, 34 minutes before

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Hazardous weather outlook, Apr 4, 5:00 AM CDT, 6 hours 11 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LITTLE ROCK AR
500 AM CDT MON APR 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-
500 AM CDT MON APR 4 2011

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

.DAY ONE...TODAY AND TONIGHT

A STORM SYSTEM AND COLD FRONT WILL PUSH THROUGH ARKANSAS TODAY AND
BRING SHOWERS AND THUNDERSTORMS. ISOLATED SEVERE STORMS ARE
POSSIBLE OVER MUCH OF THE STATE...WITH LARGE HAIL AND DAMAGING
WINDS THE MAIN THREATS. AN ISOLATED TORNADO WILL ALSO BE
POSSIBLE...ESPECIALLY THIS AFTERNOON OVER SOUTHEAST ARKANSAS WHERE
ADDITIONAL INSTABILITY WILL BE SEEN AS DAYTIME HEATING
DESTABILIZES THE ATMOSPHERE.

GUSTY SOUTH TO SOUTHWEST WINDS AT 20 TO 30 MPH ARE EXPECTED AHEAD
OF THE COLD FRONT...WITH GUSTS AROUND 30 TO 35 MPH. A LAKE WIND
ADVISORY WILL BE IN EFFECT MUCH OF ARKANSAS TODAY. GUSTY SOUTHWEST
WINDS WILL SHIFT TO THE NORTHWEST BEHIND THE FRONT...WITH WIND
SPEEDS FROM 10 TO 25 MPH WITH ISOLATED HIGHER GUSTS.

EARLY TONIGHT THE COLD FRONT WILL PUSH OUT OF ARKANSAS AND TAKE
THE RAIN WITH IT. MUCH COOLER AIR WILL FILTER IN BEHIND THE FRONT
AND LOWER TEMPERATURES TO THE 30S STATEWIDE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE NEXT CHANCE OF RAIN WILL MAINLY BE IN THE AFTERNOON TO EVENING
ON THURSDAY THROUGH SUNDAY...BUT THE THREAT OF ANY SEVERE STORMS
WILL BE LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEED LATER TODAY TO THE EVENING FOR
SOUTHERN PARTS OF THE STATE.

&&

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

59

In the hours before

Local storm report, Apr 4, 10:35 AM CDT, 36 minutes before

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Local storm report, Apr 4, 10:37 AM CDT, 34 minutes before

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Local storm report, Apr 4, 10:39 AM CDT, 32 minutes before

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Local storm report, Apr 4, 10:54 AM CDT, 17 minutes before

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Local storm report, Apr 4, 10:55 AM CDT, 16 minutes before

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Local storm report, Apr 4, 10:58 AM 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
Apr 4, 3:12 AM CDT	Special Weather Statement	LZK	Montgomery, Polk	43 min
Apr 4, 3:26 AM CDT	Severe Thunderstorm Warning	LZK	Montgomery, Pike, Polk, Scott	49 min
Apr 4, 4:02 AM CDT	Special Weather Statement	LZK	Garland	43 min
Apr 4, 4:36 AM CDT	Severe Thunderstorm Warning	LZK	Cleburne, Conway, Faulkner, Van Buren	39 min
Apr 4, 4:46 AM CDT	Severe Thunderstorm Warning	LZK	Conway, Pope	29 min
Apr 4, 5:04 AM CDT	Severe Thunderstorm Warning	LZK	Garland, Montgomery, Perry, Scott, Yell	26 min
Apr 4, 5:34 AM CDT	Special Weather Statement	LZK	Conway, Faulkner, Perry	46 min
Apr 4, 5:49 AM CDT	Special Weather Statement	LZK	Marion	46 min
Apr 4, 6:17 AM CDT	Special Weather Statement	LZK	Hot Spring, Pulaski, Saline	83 min
Apr 4, 6:18 AM CDT	Severe Thunderstorm Warning	LZK	Baxter, Fulton, Izard, Johnson, Marion, Newton and 4 more	42 min
Apr 4, 6:53 AM CDT	Special Weather Statement	LZK	Baxter, Fulton, Izard, Sharp	57 min
Apr 4, 6:57 AM CDT	Severe Thunderstorm Warning	LZK	Baxter, Searcy, Stone, Van Buren	33 min
Apr 4, 7:05 AM CDT	Severe Thunderstorm Warning	LZK	Fulton, Izard, Sharp, Stone	55 min
Apr 4, 7:29 AM CDT	Severe Thunderstorm Warning	LZK	Conway, Pope, Yell	46 min
Apr 4, 7:33 AM CDT	Special Weather Statement	LZK	Lonoke, Prairie, Woodruff	47 min
Apr 4, 8:24 AM CDT	Areal Flood Advisory	LZK	Baxter, Marion, Searcy, Stone	2 hr
Apr 4, 8:35 AM CDT	Severe Thunderstorm Warning	LZK	Clark, Hot Spring, Pike	25 min
Apr 4, 8:55 AM CDT	Severe Thunderstorm Warning	LZK	Cleveland, Dallas, Grant, Jefferson, Ouachita	35 min
Apr 4, 8:58 AM CDT	Severe Thunderstorm Warning	LZK	Clark, Dallas, Hot Spring, Ouachita, Pike	32 min
Apr 4, 9:08 AM CDT	Tornado Warning	LZK	Clark, Cleveland, Dallas, Grant, Hot Spring, Ouachita	22 min
Apr 4, 9:26 AM CDT	Severe Thunderstorm Warning	LZK	Bradley, Calhoun, Clark, Cleveland, Dallas, Drew and 8 more	49 min
Apr 4, 9:32 AM CDT	Areal Flood Advisory	LZK	Lonoke, Pulaski	118 min
Apr 4, 10:00 AM CDT	Severe Thunderstorm Warning	LZK	Bradley, Calhoun, Cleveland, Drew, Ouachita	45 min
Apr 4, 10:09 AM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Bradley, Cleveland, Desha, Drew, Jefferson and 5 more	36 min
Apr 4, 10:41 AM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Desha, Drew, Jefferson, Lincoln, Monroe and 1 more	34 min
Apr 4, 10:45 AM CDT	Severe Thunderstorm Warning	LZK	Bradley, Desha, Drew	45 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2011 Every severe thunderstorm 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.