Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 50, NWS Little Rock, AR

April 4, 20114 counties in Arkansas

NWS Little Rock, AR issued this severe thunderstorm warning at Apr 4, 2011, 3:26 AM CDT for 4 counties in Arkansas. It was in force for 49 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, 3:26 AM CDT (08:26 UTC)
Expired: Apr 4, 2011, 4:15 AM CDT
In force: 49 min
Issued by: NWS Little Rock, AR
Area: Storm-based polygon

Counties Montgomery County, AR, Pike County, AR, Polk County, AR, Scott County, AR

The radar

The Western Arkansas radar (KSRX), 96 km from the middle of the area, began a volume at 08:25 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

Shreveport, LA (KSHV), launched 00:00Z, 8.4 hours before the alert went out and 226 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: 504 J/kg
Mixed-layer CIN: -318 J/kg
Mixed-layer LCL: 1389 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 258 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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, 12:45 AM CDT, 2 hours 41 minutes earlier.

Area forecast discussion, Apr 4, 12:45 AM CDT, 2 hours 41 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Apr 3, 2:15 PM CDT, 13 hours 11 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LITTLE ROCK AR
215 PM CDT SUN APR 3 2011

ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-041000-
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-
215 PM CDT SUN APR 3 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT

A COLD FRONT WILL PUSH THROUGH THE PLAINS THIS AFTERNOON AND
TONIGHT. THE FRONT WILL TRIGGER SCATTERED SEVERE THUNDERSTORMS
IN EASTERN KANSAS AND WESTERN MISSOURI THIS EVENING...WITH STORMS
BUILDING TOWARD ARKANSAS TONIGHT. THERE IS AT LEAST A CHANCE OF
SEVERE WEATHER IN NORTHWEST SECTIONS OF THE STATE BY DAWN MONDAY.

GUSTY SOUTH TO SOUTHWEST WINDS AT 20 TO 30 MPH ARE EXPECTED THIS
AFTERNOON...WITH GUSTS FROM 30 TO 40 MPH. GUSTS COULD EXCEED 40 MPH
IN SOME AREAS. SPEEDS WILL DECREASE SOMEWHAT TONIGHT TO 15 TO 25
MPH. A WIND ADVISORY HAS BEEN POSTED FOR MUCH OF ARKANSAS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

THE FRONT WILL PUSH THROUGH THE REGION ON MONDAY. ISOLATED SEVERE
STORMS ARE POSSIBLE IN THE NORTHWEST HALF OF THE STATE DURING THE
MORNING. SEVERE WEATHER IS MORE LIKELY FARTHER SOUTHEAST IN THE
AFTERNOON AS DAYTIME HEATING DESTABILIZES THE ATMOSPHERE. THIS
INCLUDES AREAS SOUTH AND EAST OF BRINKLEY...PINE BLUFF AND CAMDEN.

THE MAIN CONCERN WITH SEVERE STORMS ON MONDAY WILL BE DAMAGING WINDS
AND QUARTER SIZE HAIL OR LARGER. GIVEN STRONG WINDS TURNING WITH
HEIGHT...AN ISOLATED TORNADO OR TWO CANNOT BE RULED OUT.

GUSTY SOUTHWEST WINDS WILL SHIFT TO THE NORTHWEST BEHIND THE
FRONT...WITH A WIND ADVISORY REMAINING IN EFFECT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT AND MONDAY.

&&

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

59/46

In the hours before

Special weather statement, Apr 4, 3:12 AM CDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
312 AM CDT MON APR 4 2011

ARZ037-040-041-052-040855-
MONTGOMERY AR-PIKE AR-POLK AR-SCOTT AR-
312 AM CDT MON APR 4 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SCOTT...WESTERN
MONTGOMERY...POLK AND NORTHERN PIKE COUNTIES UNTIL 400 AM CDT...

AT 310 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN
AREA OF THUNDERSTORMS WAS RAPIDLY DEVELOPING OVER FAR WESTERN POLK
COUNTY...NEAR VANDERVOORT...OR 16 MILES SOUTH OF MENA...MOVING
NORTHEAST AT 50 MPH.

SMALL HAIL TO PEA SIZE AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH
THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING AND BRIEF HEAVY
RAIN.

* LOCATIONS IMPACTED INCLUDE...
  MENA...               LAKE GREESON...       WICKES...
  VANDERVOORT...        POLK CNTY FAIRGNDS... OPAL...
  ODEN...               NORMAN...             MOUNTAIN FORK...
  MIMOSA...             MCCAULEY...
  LITTLE MISSOURI FALLS REC AREA...           LAKE WILHELMINA...
  LAKE MENA...          HATFIELD...           HARTLEY...
  GRANNIS...            GAP MTN...

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

LAT...LON 3465 9445 3484 9379 3420 9351 3420 9393
      3426 9392 3435 9394 3435 9425 3419 9424
      3419 9446
TIME...MOT...LOC 0810Z 242DEG 58KT 3438 9431

59

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, 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
Apr 4, 11:11 AM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Desha, Drew, Monroe	34 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.