Alert archive / Mississippi / Freeze Warnings in 2018

Freeze Warning 5, NWS Jackson, MS

April 7, 201817 counties in Mississippi; Ashley County, Chicot County, Arkansas

NWS Jackson, MS issued this freeze warning at Apr 7, 2018, 3:45 AM CDT for 17 counties in Mississippi; Ashley County, Chicot County, Arkansas. It took effect at Apr 8, 2018, 1:00 AM CDT. It was in force for 7 hr. 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 7, 2018, 3:45 AM CDT (08:45 UTC)
In effect from: Apr 8, 2018, 1:00 AM CDT
Expired: Apr 8, 2018, 8:00 AM CDT
In force: 7 hr
Issued by: NWS Jackson, MS

Counties Ashley County, AR, Chicot County, AR, Attala County, MS, Bolivar County, MS, Carroll County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Leflore County, MS, Lowndes County, MS, Montgomery County, MS, Noxubee County, MS, Oktibbeha County, MS, Sunflower County, MS, Washington County, MS, Webster County, MS, Winston County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 124 km from the middle of the area, began a volume at 08:47 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

Jackson, MS (KJAN), launched 00:00Z, 8.8 hours before the alert went out and 121 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: 877 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 706 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 369 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze warning 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 freeze warning went out at Apr 7, 12:39 AM CDT, 3 hours 6 minutes earlier.

Area forecast discussion, Apr 7, 12:39 AM CDT, 3 hours 6 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 7, 12:44 AM CDT, 3 hours 1 minute 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

Local storm report, Apr 7, 1:25 AM CDT, 2 hours 20 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>

Local storm report, Apr 7, 1:36 AM CDT, 2 hours 9 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>

Special weather statement, Apr 7, 1:38 AM CDT, 2 hours 7 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>

Special weather statement, Apr 7, 1:48 AM CDT, 1 hour 57 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>

Local storm report, Apr 7, 2:34 AM CDT, 1 hour 11 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>

Local storm report, Apr 7, 3:24 AM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
324 AM CDT SAT APR 7 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0729 PM     FLASH FLOOD      4 SW YAZOO CITY         32.81N 90.45W
04/06/2018                   YAZOO              MS   911 CALL CENTER

            FLOODING REPORTED ALONG HWY 3.

&&

TW

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 7:18 PM CDT	Flash Flood Warning	JAN	Issaquena, Warren	3 hr
Apr 6, 7:52 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Newton, Rankin, Scott, Smith	53 min
Apr 6, 8:00 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Copiah, Hinds, Jefferson, Warren	60 min
Apr 6, 8:03 PM CDT	Tornado Warning	JAN	Rankin	15 min
Apr 6, 8:09 PM CDT	Tornado Warning	JAN	Claiborne, Warren	36 min
Apr 6, 8:13 PM CDT	Flash Flood Warning	JAN	Hinds, Madison, Rankin, Warren	3 hr
Apr 6, 8:48 PM CDT	Special Weather Statement	JAN	Newton, Smith	57 min
Apr 6, 8:51 PM CDT	Flash Flood Warning	JAN	Leake, Neshoba, Newton, Scott	3 hr
Apr 6, 8:54 PM CDT	Severe Thunderstorm Warning	JAN	Adams, Claiborne, Copiah, Hinds, Jefferson, Simpson	66 min
Apr 6, 9:19 PM CDT	Tornado Warning	JAN	Claiborne, Copiah	41 min
Apr 6, 9:25 PM CDT	Tornado Warning	JAN	Copiah, Hinds	35 min
Apr 6, 9:29 PM CDT	Severe Thunderstorm Warning	JAN	Clarke, Jasper, Lauderdale, Newton	46 min
Apr 6, 9:37 PM CDT	Severe Thunderstorm Warning	JAN	Adams	68 min
Apr 6, 9:45 PM CDT	Flash Flood Warning	JAN	Clarke, Kemper, Lauderdale	3 hr
Apr 6, 9:55 PM CDT	River Flood Warning	JAN	Leake	4 days
Apr 6, 9:57 PM CDT	Tornado Warning	JAN	Copiah	48 min
Apr 6, 10:05 PM CDT	Severe Thunderstorm Warning	JAN	Simpson	55 min
Apr 6, 10:07 PM CDT	River Flood Warning	JAN	Sharkey	69 hr
Apr 6, 10:13 PM CDT	Flash Flood Warning	JAN	Hinds, Rankin	3 hr
Apr 6, 10:35 PM CDT	Tornado Warning	JAN	Jefferson Davis, Lawrence, Simpson	55 min
Apr 6, 10:43 PM CDT	Severe Thunderstorm Warning	JAN	Lawrence, Lincoln	46 min
Apr 6, 10:51 PM CDT	Severe Thunderstorm Warning	JAN	Adams, Franklin, Jefferson	39 min
Apr 6, 11:02 PM CDT	Areal Flood Warning	JAN	Hinds, Madison, Rankin, Warren	6 hr
Apr 6, 11:10 PM CDT	Flash Flood Warning	JAN	Clarke, Jasper, Smith	4 hr
Apr 6, 11:13 PM CDT	Tornado Warning	JAN	Covington	47 min
Apr 6, 11:17 PM CDT	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence, Marion	38 min
Apr 6, 11:36 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Lincoln	54 min
Apr 6, 11:46 PM CDT	Severe Thunderstorm Warning	JAN	Jones	59 min
Apr 7, 12:08 AM CDT	Flash Flood Warning	JAN	Jones	4 hr
Apr 7, 12:48 AM CDT	Special Weather Statement	JAN	Lamar, Marion	57 min
Apr 7, 1:26 AM CDT	Areal Flood Warning	JAN	Rankin	6 hr
Apr 7, 1:38 AM CDT	Special Weather Statement	JAN	Forrest	52 min
Apr 7, 1:48 AM CDT	Special Weather Statement	JAN	Lamar	27 min
Apr 7, 9:01 AM CDT	River Flood Warning	JAN	Leake	5 days
Apr 7, 9:02 AM CDT	River Flood Warning	JAN	Leake	5 days
Apr 7, 9:03 AM CDT	River Flood Warning	JAN	Leake	50 hr
Apr 6, 7:32 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Madison, Morehouse, Richland	58 min
Apr 6, 7:51 PM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Concordia, Franklin, Tensas	54 min
Apr 6, 8:04 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Madison, Tensas	56 min
Apr 6, 10:28 PM CDT	Flash Flood Warning	JAN	Franklin, Madison, Richland, Tensas	3 hr
Apr 6, 11:33 PM CDT	Special Weather Statement	JAN	Concordia	42 min

Nearby

Freeze Warnings in Mississippi, 2018 Freeze Warnings in Arkansas, 2018 Every freeze warning 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.