Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS Jackson, MS

July 13, 2021Lowndes County, Mississippi

NWS Jackson, MS issued this special weather statement at Jul 13, 2021, 11:48 AM CDT for Lowndes County, Mississippi. It was in force for 42 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: Jul 13, 2021, 11:48 AM CDT (16:48 UTC)
Expired: Jul 13, 2021, 12:30 PM CDT
In force: 42 min
Issued by: NWS Jackson, MS

County Lowndes County, MS

The radar

The Columbus AFB radar (KGWX), 43 km from the middle of the area, began a volume at 16:48 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

Birmingham, AL (KBMX), launched 12:00Z, 4.8 hours before the alert went out and 183 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: 15 J/kg
Mixed-layer CIN: -155 J/kg
Mixed-layer LCL: 865 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!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>

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 Jackson, MS wrote its last area forecast discussion before this special weather statement went out at Jul 13, 9:58 AM CDT, 1 hour 50 minutes earlier.

Area forecast discussion, Jul 13, 9:58 AM CDT, 1 hour 50 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, Jul 13, 4:32 AM CDT, 7 hours 16 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>

In the hours before

Special weather statement, Jul 13, 11:48 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Jackson MS
1148 AM CDT Tue Jul 13 2021

MSZ030-031-033-131730-
Lowndes MS-Oktibbeha MS-Clay MS-
1148 AM CDT Tue Jul 13 2021

...STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN OKTIBBEHA...CENTRAL
CLAY AND CENTRAL LOWNDES COUNTIES UNTIL 1230 PM CDT...

At 1148 AM CDT, Meteorologists were tracking strong thunderstorms
along a line extending from near Trebloc to near Pala Alto to near
Muldrow. Movement was northeast at 25 mph.

Winds in excess of 40 mph will be possible with these storms.

Strong thunderstorms will be near...
  Waverly around 1220 PM CDT.
  Columbus AFB and Kolola Springs around 1230 PM CDT.

Other locations impacted by these storms include Artesia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High winds can bring down trees and large limbs resulting in serious
injury or property damage. Exercise extreme caution when outdoors
during such strong winds...and be especially aware of older trees.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3335 8874 3365 8875 3375 8896 3376 8893
      3381 8893 3381 8872 3368 8872 3367 8849
      3366 8852 3365 8851 3368 8838 3348 8832
TIME...MOT...LOC 1648Z 226DEG 21KT 3377 8885 3370 8870 3349 8870

NF

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 12, 7:43 PM CDT	Special Weather Statement	JAN	Claiborne	47 min
Jul 12, 9:12 PM CDT	Special Weather Statement	JAN	Claiborne, Copiah	33 min
Jul 13, 4:55 PM CDT	Special Weather Statement	JAN	Newton	50 min
Jul 13, 5:06 PM CDT	Special Weather Statement	JAN	Jones	24 min
Jul 13, 5:29 PM CDT	Special Weather Statement	JAN	Clarke	46 min
Jul 13, 5:46 PM CDT	Special Weather Statement	JAN	Jones	44 min
Jul 13, 6:17 PM CDT	Special Weather Statement	JAN	Covington	28 min
Jul 13, 6:30 PM CDT	Special Weather Statement	JAN	Clarke	45 min
Jul 13, 3:09 PM CDT	Special Weather Statement	JAN	Tensas	51 min
Jul 13, 5:48 PM CDT	Special Weather Statement	JAN	Concordia	42 min

Nearby

Special Weather Statements in Mississippi, 2021 Every special weather statement in 2021

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.