Alert archive / Arkansas / Special Weather Statements in 2017

Special Weather Statement, NWS Little Rock, AR

April 21, 2017Lonoke County, Arkansas

NWS Little Rock, AR issued this special weather statement at Apr 21, 2017, 11:30 PM CDT for Lonoke County, Arkansas. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 21, 2017, 11:30 PM CDT (04:30 UTC)
Expired: Apr 22, 2017, 12:15 AM CDT
In force: 45 min
Issued by: NWS Little Rock, AR

County Lonoke County, AR

The radar

The Little Rock radar (KLZK), 60 km from the middle of the area, began a volume at 04:31 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

Little Rock, AR (KBYH), launched 00:00Z, 4.5 hours before the alert went out and 168 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 889 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 312 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Apr 21, 10:05 PM CDT, 1 hour 25 minutes before

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Special weather statement, Apr 21, 10:07 PM CDT, 1 hour 23 minutes before

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Special weather statement, Apr 21, 11:30 PM CDT, 0 minutes before

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<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.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 21, 9:07 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Marion, Searcy	38 min
Apr 21, 9:36 PM CDT	Severe Thunderstorm Warning	LZK	Baxter, Izard, Stone	39 min
Apr 21, 10:06 PM CDT	Severe Thunderstorm Warning	LZK	Izard, Sharp	39 min
Apr 21, 10:07 PM CDT	Special Weather Statement	LZK	Polk	38 min
Apr 21, 10:30 PM CDT	Severe Thunderstorm Warning	LZK	Polk, Scott	45 min
Apr 21, 11:42 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Jefferson, Lonoke, Prairie	48 min
Apr 21, 11:47 PM CDT	Special Weather Statement	LZK	White	43 min
Apr 21, 11:47 PM CDT	Severe Thunderstorm Warning	LZK	Clark, Garland, Hot Spring, Montgomery, Pike	32 min
Apr 22, 12:32 AM CDT	Special Weather Statement	LZK	Monroe	28 min
Apr 22, 12:36 AM CDT	Special Weather Statement	LZK	White	39 min
Apr 22, 12:48 AM CDT	Special Weather Statement	LZK	Grant, Hot Spring, Saline	42 min
Apr 22, 1:33 AM CDT	Special Weather Statement	LZK	Grant, Jefferson	42 min
Apr 22, 2:17 AM CDT	Special Weather Statement	LZK	Arkansas, Cleveland, Jefferson, Lincoln	43 min
Apr 22, 2:48 AM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Cleveland, Desha, Jefferson, Lincoln	42 min
Apr 22, 3:29 AM CDT	Special Weather Statement	LZK	Desha	46 min
Apr 22, 9:32 AM CDT	River Flood Advisory	LZK	Searcy	24 hr
Apr 22, 10:09 AM CDT	River Flood Warning	LZK	Randolph	32 days
Apr 22, 10:22 AM CDT	River Flood Warning	LZK	White, Woodruff	60 days

Nearby

Special Weather Statements in Arkansas, 2017 Every special weather statement in 2017

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.