Alert archive / Arkansas / Special Weather Statements in 2018

Special Weather Statement, NWS Memphis, TN

August 7, 2018Randolph County, Arkansas

NWS Memphis, TN issued this special weather statement at Aug 7, 2018, 2:37 PM CDT for Randolph County, Arkansas. It was in force for 38 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: Aug 7, 2018, 2:37 PM CDT (19:37 UTC)
Expired: Aug 7, 2018, 3:15 PM CDT
In force: 38 min
Issued by: NWS Memphis, TN

County Randolph County, AR

The radar

The Memphis radar (KNQA), 177 km from the middle of the area, began a volume at 19:39 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 12:00Z, 7.6 hours before the alert went out and 217 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: 282 J/kg
Mixed-layer CIN: -101 J/kg
Mixed-layer LCL: 1343 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: -21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

NWS Memphis, TN wrote its last area forecast discussion before this special weather statement went out at Aug 7, 12:01 PM CDT, 2 hours 36 minutes earlier.

Area forecast discussion, Aug 7, 12:01 PM CDT, 2 hours 36 minutes before

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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <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.
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Hazardous weather outlook, Aug 7, 12:15 PM CDT, 2 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Memphis TN
1215 PM CDT Tue Aug 7 2018

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>022-048>055-088>092-081915-
Alcorn-Benton MS-Benton TN-Calhoun-Carroll-Chester-Chickasaw-Clay-
Coahoma-Craighead-Crittenden-Crockett-Cross-DeSoto-Decatur-
Dunklin-Dyer-Fayette-Gibson-Greene-Hardeman-Hardin-Haywood-
Henderson-Henry-Itawamba-Lafayette-Lake-Lauderdale-Lawrence-
Lee AR-Lee MS-Madison-Marshall-McNairy-Mississippi-Monroe-Obion-
Panola-Pemiscot-Phillips-Poinsett-Pontotoc-Prentiss-Quitman-
Randolph-Shelby-St. Francis-Tallahatchie-Tate-Tippah-Tipton-
Tishomingo-Tunica-Union-Weakley-Yalobusha-
1215 PM CDT Tue Aug 7 2018

This hazardous weather outlook is for portions of East Arkansas...
the Missouri Bootheel...North Mississippi...and West Tennessee.

.DAY ONE...This Afternoon and Tonight

There is a Marginal Risk for severe thunderstorms through
tonight over areas north of Interstate 40. Damaging winds and
excessive rainfall will be the primary threats. Isolated strong
thunderstorms will be possible over the remainder of the Midsouth
through tonight.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

A few strong to severe thunderstorms will be possible Wednesday
and Wednesday night. Damaging winds and excessive rainfall may be
associated with the strongest storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

PWB

In the hours before

Special weather statement, Aug 7, 2:37 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Memphis TN
237 PM CDT TUE AUG 7 2018

ARZ008-072015-
Randolph AR-
237 PM CDT TUE AUG 7 2018

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 315 PM CDT
FOR...

Northwestern Randolph County in eastern Arkansas...

At 237 PM CDT...a strong thunderstorm producing winds at least 40 mph
was located 7 miles southeast of Mammoth Spring, moving northeast at
25 mph.

Very heavy rain along with continuous cloud to ground lightning are
also possible with this thunderstorm.

People in northwestern Randolph County should monitor this storm
closely.

LAT...LON 3650 9096 3639 9130 3639 9131 3642 9131
      3642 9135 3644 9135 3647 9136 3647 9138
      3648 9138 3648 9140 3650 9141
TIME...MOT...LOC 1937Z 241DEG 23KT 3644 9141

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 7, 3:45 PM CDT	Special Weather Statement	MEG	Clay	45 min
Aug 7, 4:10 PM CDT	Special Weather Statement	MEG	Lawrence	50 min
Aug 7, 4:23 PM CDT	Special Weather Statement	MEG	Clay	52 min
Aug 7, 4:40 PM CDT	Special Weather Statement	MEG	Poinsett	50 min
Aug 7, 4:53 PM CDT	Special Weather Statement	MEG	Craighead, Greene	67 min
Aug 7, 5:02 PM CDT	Severe Thunderstorm Warning	MEG	Craighead, Greene	27 min

Nearby

Special Weather Statements in Arkansas, 2018 Every special weather statement in 2018

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.