Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS Jackson, MS

August 11, 2021Jones County, Mississippi

NWS Jackson, MS issued this special weather statement at Aug 11, 2021, 3:01 PM CDT for Jones County, Mississippi. It was in force for 29 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 11, 2021, 3:01 PM CDT (20:01 UTC)
Expired: Aug 11, 2021, 3:30 PM CDT
In force: 29 min
Issued by: NWS Jackson, MS
Hail: 0.00 in
Wind: 40

County Jones County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 120 km from the middle of the area, began a volume at 20:05 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 12:00Z, 8.0 hours before the alert went out and 130 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: 1448 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1031 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -5 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 Jackson, MS wrote its last area forecast discussion before this special weather statement went out at Aug 11, 1:07 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, Aug 11, 1:07 PM CDT, 1 hour 54 minutes before

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<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>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Aug 11, 2:43 PM CDT, 18 minutes before

Hazardous Weather Outlook
National Weather Service Jackson MS
243 PM CDT Wed Aug 11 2021

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>049-053-054-
059>062-121945-
Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland-
Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar-
Sunflower-Leflore-Grenada-Carroll-Montgomery-Webster-Clay-Lowndes-
Choctaw-Oktibbeha-Washington-Humphreys-Holmes-Attala-Winston-
Noxubee-Issaquena-Sharkey-Yazoo-Madison MS-Leake-Neshoba-Kemper-
Warren-Hinds-Rankin-Claiborne-Copiah-Jefferson-Adams-Franklin MS-
Lincoln-
243 PM CDT Wed Aug 11 2021

This hazardous weather outlook is for portions of southeast
Arkansas, northeast Louisiana, central Mississippi, north central
Mississippi, south central Mississippi, and southwest
Mississippi.

.DAY ONE...Tonight and Thursday

DANGEROUS HEAT
THREAT...Elevated
TIMING...Thursday

Thursday, dangerous heat is likely with heat index readings
between 105 to 110 degrees. Heat exhaustion will be likely with
outdoor activity.

(https://www.weather.gov/images/jan/graphicast/1.png)

.DAYS TWO THROUGH SEVEN...Thursday night through Tuesday

Heat stress will continue to be a concern through Friday as
moisture will combine with temperatures in the mid to upper 90s.
This will result in heat indices between 105 to 110 degrees.

(https://www.weather.gov/images/jan/graphicast/1.png)

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations is not expected through next Tuesday.

MSZ050>052-055>058-063>066-072>074-121945-
Scott-Newton-Lauderdale-Simpson-Smith-Jasper-Clarke-Lawrence-
Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest-
243 PM CDT Wed Aug 11 2021

This hazardous weather outlook is for portions of central
Mississippi, east central Mississippi, south central Mississippi,
and southeast Mississippi.

.DAY ONE...Tonight and Thursday

DANGEROUS HEAT
THREAT...Limited
TIMING...Thursday

Thursday, temperatures in the low to mid 90s will combine with
ample moisture. This will lead to heat indices around 105
degrees. Heat exhaustion will be possible with outdoor activity.

(https://www.weather.gov/images/jan/graphicast/1.png)

.DAYS TWO THROUGH SEVEN...Thursday night through Tuesday

Heat stress will continue to be a concern through Friday as
moisture will combine with temperatures in the low to mid 90s.
This will result in heat indices around 105 degrees.

(https://www.weather.gov/images/jan/graphicast/1.png)

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations is not expected through next Tuesday.

23

&&

...HAZARD LEGEND...

*DANGEROUS HEAT*
Extreme...Extreme heat is expected with peak heat index values
 in excess of 110 degrees for multiple days. Heat stroke continues
 to be a major concern.
Significant...Dangerous heat expected with peak heat index values
 in excess of 110 degrees. Heat stroke will be a significant
 concern.
Elevated...Dangerous heat likely with peak heat index values
 ranging from 106 to 110 degrees. Heat exhaustion will be likely.
Limited...Caution is advised for possible dangerous heat as
 heat index values peak near 105 degrees. Heat exhaustion will
 be possible.

...USEFUL WEATHER WEB PAGES (URLS)...

NWS JAN Home page...
   https://www.weather.gov/jan
Stay Aware, Stay Safe NWS JAN Briefing Page...
   https://www.weather.gov/jan/safe
Latest Weather Briefing...
   https://www.weather.gov/jan/weather_briefing

Tropical page...
   https://www.weather.gov/srh/tropical?office=jan
National Hurricane Center Home Page...
   https://www.nhc.noaa.gov/
Find NWS JAN on Facebook...
   https://www.facebook.com/NWSJacksonMS
Follow NWS JAN on Twitter...
   @NWSJacksonMS
Follow NWS JAN on Youtube...
   https://www.youtube.com/user/NWSJacksonMiss

In the hours before

Special weather statement, Aug 11, 2:16 PM CDT, 45 minutes before

Special Weather Statement
National Weather Service Jackson MS
216 PM CDT Wed Aug 11 2021

MSZ058-111945-
Clarke MS-
216 PM CDT Wed Aug 11 2021

...A strong thunderstorm will impact portions of eastern Clarke
County through 245 PM CDT...

At 215 PM CDT, Doppler radar was tracking a strong thunderstorm near
Sykes, or 7 miles east of Quitman, moving west at 5 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Middleton, Sykes and De Soto.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3214 8845 3189 8859 3194 8874 3220 8862
TIME...MOT...LOC 1915Z 107DEG 5KT 3203 8859

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

TW

Special weather statement, Aug 11, 3:01 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Jackson MS
301 PM CDT Wed Aug 11 2021

MSZ066-112030-
Jones MS-
301 PM CDT Wed Aug 11 2021

...Strong thunderstorms will impact portions of southeastern Jones
County through 330 PM CDT...

At 300 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles west of Waynesboro to near Ovett to 6
miles north of New Augusta. Movement was northwest at 10 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Mill Creek and Ovett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3160 8909 3171 8894 3143 8894 3143 8913
TIME...MOT...LOC 2000Z 119DEG 9KT 3172 8879 3156 8900 3130 8906

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

TW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 2:16 PM CDT	Special Weather Statement	JAN	Clarke	29 min
Aug 11, 3:24 PM CDT	Special Weather Statement	JAN	Jones	51 min
Aug 11, 3:32 PM CDT	Special Weather Statement	JAN	Jasper	43 min
Aug 11, 3:53 PM CDT	Special Weather Statement	JAN	Lowndes	67 min
Aug 11, 4:05 PM CDT	Severe Thunderstorm Warning	JAN	Jasper	37 min
Aug 11, 4:32 PM CDT	Special Weather Statement	JAN	Smith	28 min
Aug 11, 4:36 PM CDT	Special Weather Statement	JAN	Simpson	24 min
Aug 11, 4:46 PM CDT	Special Weather Statement	JAN	Simpson	29 min
Aug 11, 4:46 PM CDT	Special Weather Statement	JAN	Smith	29 min
Aug 11, 4:47 PM CDT	Special Weather Statement	JAN	Kemper	28 min
Aug 11, 5:18 PM CDT	Special Weather Statement	JAN	Rankin	42 min
Aug 11, 5:22 PM CDT	Special Weather Statement	JAN	Oktibbeha	38 min
Aug 11, 5:49 PM CDT	Special Weather Statement	JAN	Noxubee	26 min
Aug 11, 5:50 PM CDT	Special Weather Statement	JAN	Noxubee	25 min
Aug 11, 6:49 PM CDT	Special Weather Statement	JAN	Choctaw	26 min
Aug 11, 6:59 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw	46 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.