Alert archive / Mississippi / Special Weather Statements in 2021

Special Weather Statement, NWS Jackson, MS

April 23, 2021Marion County, Mississippi

NWS Jackson, MS issued this special weather statement at Apr 23, 2021, 10:04 PM CDT for Marion County, Mississippi. It was in force for 26 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 23, 2021, 10:04 PM CDT (03:04 UTC)
Expired
Apr 23, 2021, 10:30 PM CDT
In force
26 min
Issued by
NWS Jackson, MS

County Marion County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.1 hours before the alert went out and 102 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-pSkew-T log-p diagram, Slidell Radar S, LA at 00:00Z on 2021-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2021-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 156 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
873 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
156 m²/s²
0-3 km storm-relative helicity
263 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 Apr 23, 9:14 PM CDT, 50 minutes earlier.

Area forecast discussion, Apr 23, 9:14 PM CDT, 50 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Jackson MS
914 PM CDT Fri Apr 23 2021

.UPDATE...
Updated for evening discussion.

&&

.DISCUSSION...
Local radars are lit up with a large area of moderate rain with
embedded thunderstorms, the greatest coverage of which is south of
Interstate 20. Surface analysis suggests a warm front from just
south of Winnsboro, Louisiana To just south of Hattiesburg. The
warm front may not move much farther north until later tonight as
the shortwave trough comes closer to our CWA. Thus the area south
of Interstate 20 will see the greatest chance for severe storms
and potential for flash flooding tonight. A Tornado Watch has been
issued for this area until 4 AM and a Flash Flood Watch remains in
effect until 9 AM.

Prior discussion below:

Tonight through Saturday...Surface high pressure continues to
steadily slide off the East Coast this afternoon, allowing
moisture to subtly return to the region. As both moisture and flow
increase throughout the various levels of the atmosphere, ahead
of a developing storm system to the west, showers will likewise
continue to increase across the CWA through the remainder of the
day, with an isolated thunderstorm possible.

Tonight, a shortwave embedded in zonal flow aloft will shift west to
east across the region.  A surface low associated with this trough
will shift east northeast from out of Texas and across North
Mississippi in the process.  A warm front will begin lifting
northward into the CWA this evening into tonight, with a cold front
eventually dragging east through the CWA late Saturday afternoon.

Increasing wind shear across the forecast area tonight, in addition
to increasingly instability, mainly south of the interstate 20
corridor, could result in some severe storms across portions of the
CWA tonight into Saturday morning.  Locations along the Highway 84
corridor will see the better threat of severe storms.  There, the
better conglomeration of shear, moisture, and forcing will exist.
Damaging wind gusts of 70 mph will be the primary concern with the
most intense storms, but a tornado will also be possible.  As
convection departs, models indicate a wake low developing across
central or southern portions of the CWA early Saturday morning. This
could result in some breezy winds first things Saturday.

Heavy rainfall in a short amount of time and training of convection
will also result in the potential for flash flooding, especially
across southern portions of the CWA tonight through Saturday
morning.  There, amounts ranging from 2-6 inches will be possible
through Saturday morning, as convection could potentially train
along the boundary and across the same locations.  As a result, a
Flash Flood Watch will be issued for much of the southern half of
the CWA through early Saturday morning.

Another potential for severe storms could exist across eastern
portions of the CWA late Saturday morning into Saturday afternoon.
Much of this pends on whether our airmass can recover fast enough,
before the cold front itself pushes through.  If instability can
recover fast enough, this along with remaining adequate shear, and
steep mid-level lapse rates, could result in some severe storms
across eastern portions of the CWA.  Up to golf ball size hail, and
damaging winds of 60 mph will be the main concerns with these
storms. This activity will exit east into Alabama by late afternoon.
/19/

Saturday night through Thursday...Dry weather looks to return to the
region Saturday night as the frontal system moves off to the east
and high pressure begins moving in. Dry weather continues Sunday and
Monday as high pressure settles in across the region. Temperatures
will be warming up, with highs Sunday mainly in the middle to upper
70s, then lower to middle 80s on Monday. Chances for showers and
storms look to return late Tuesday in the west well out ahead of an
approaching frontal system. Chances for showers and storms will
exist area wide Wednesday and Thursday as the frontal system
approaches and moves through the area. Highs Tuesday and Wednesday
will mainly be in the lower to middle 80s, then cooling to the 70s
by Thursday. /27/

&&

.AVIATION...
00Z TAF discussion:
VFR conditions were still observed areawide at 2330Z but a large
area of TSRA were noted on radar just west of the MS river.
Widespread TSRA tonight and Saturday morning will lead to poor
flying conditions with MVFR/IFR cigs and vsbys prevailing until
Saturday aftn before improving. A south wind with gusts to 20kts
is expected to develop later tonight followed by a wind shift to
the nw with gusts to 25KTs with the passage of a cold front
Saturday as well. /22/

&&

.PRELIMINARY POINT TEMPS/POPS...
Jackson       58  80  53  77 / 100  38   2   0
Meridian      58  80  52  78 / 100  57   4   0
Vicksburg     61  80  54  78 / 100  22   1   0
Hattiesburg   63  82  56  80 / 100  54   2   0
Natchez       61  81  55  79 / 100  15   1   0
Greenville    56  75  51  75 / 100  30   1   1
Greenwood     57  75  52  76 / 100  43   2   1

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Flash Flood Watch until 9 AM CDT Saturday for MSZ047>066-072>074.

LA...Flash Flood Watch until 9 AM CDT Saturday for LAZ023>026.

AR...None.

&&

19/22/27
Hazardous weather outlook, Apr 23, 3:41 PM CDT, 6 hours 23 minutes before
Hazardous Weather Outlook
National Weather Service Jackson MS
341 PM CDT Fri Apr 23 2021

ARZ074-LAZ007>009-015-MSZ040-041-241100-
Ashley-Morehouse-West Carroll-East Carroll-Richland-Issaquena-
Sharkey-
341 PM CDT Fri Apr 23 2021

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

.DAY ONE...Tonight and Saturday...

SEVERE THUNDERSTORMS
THREAT...Slight
TIMING...Tonight

FLOODING
THREAT...Limited
TIMING...Tonight

Severe thunderstorms are possible. Some thunderstorms could
produce damaging winds of 60 to 70 mph, and possibly a tornado.

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

Localized flash flooding is possible, particularly in low lying
and urban areas. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

.DAYS TWO THROUGH SEVEN...Saturday Night through Thursday

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight.

ARZ075-MSZ018-034-241100-
Chicot-Bolivar-Washington-
341 PM CDT Fri Apr 23 2021

This hazardous weather outlook is for portions of southeast
Arkansas, and northwest Mississippi.

.DAY ONE...Tonight and Saturday...

SEVERE THUNDERSTORMS
THREAT...Marginal
TIMING...Tonight

FLOODING
THREAT...Limited
TIMING...Tonight

Isolated severe thunderstorms are possible. Some thunderstorms
could produce damaging wind gusts up to 60 mph.

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

Localized flash flooding is possible, particularly in low lying
and urban areas. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight.

MSZ019-025-027-028-035>037-241100-
Sunflower-Leflore-Carroll-Montgomery-Humphreys-Holmes-Attala-
341 PM CDT Fri Apr 23 2021

This hazardous weather outlook is for portions of central
Mississippi, north central Mississippi, and northwest
Mississippi.

.DAY ONE...Tonight and Saturday...

SEVERE THUNDERSTORMS
THREAT...Marginal
TIMING...Tonight through Saturday

FLOODING
THREAT...Limited
TIMING...Tonight

Isolated severe thunderstorms are possible. Some thunderstorms
could produce damaging wind gusts up to 60 mph.

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

Localized flash flooding is possible, particularly in low lying
and urban areas. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight
through Saturday.

MSZ032-033-038-039-044>046-241100-
Choctaw-Oktibbeha-Winston-Noxubee-Leake-Neshoba-Kemper-
341 PM CDT Fri Apr 23 2021

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

.DAY ONE...Tonight and Saturday...

FLOODING
THREAT...Limited
TIMING...Tonight

SEVERE THUNDERSTORMS
THREAT...Slight
TIMING...Mainly Saturday

Localized flash flooding is possible, particularly in low lying
and urban areas. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

Severe thunderstorms are possible mainly Saturday. Some
thunderstorms could produce damaging winds of 60 mph, and hail up to
the size of golf balls.

(https://www.weather.gov/images/jan/graphicast/1.png)
(https://www.weather.gov/images/jan/graphicast/3.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight
through Saturday.

MSZ029>031-241100-
Webster-Clay-Lowndes-
341 PM CDT Fri Apr 23 2021

This hazardous weather outlook is for portions of north central
Mississippi, and northeast Mississippi.

.DAY ONE...Tonight and Saturday...

FLOODING
THREAT...Limited
TIMING...Tonight

SEVERE THUNDERSTORMS
THREAT...Slight
TIMING...Saturday

Localized flash flooding is possible, particularly in low lying
and urban areas. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

Severe thunderstorms are possible Saturday. Some thunderstorms
could produce damaging winds of 60, and hail up to the size of
golf balls.

(https://www.weather.gov/images/jan/graphicast/3.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region Saturday.

MSZ042-043-241100-
Yazoo-Madison MS-
341 PM CDT Fri Apr 23 2021

This hazardous weather outlook is for portions of central
Mississippi.

.DAY ONE...Tonight and Saturday

SEVERE THUNDERSTORMS
THREAT...Slight
TIMING...Mainly Tonight

FLOODING
THREAT...Limited
TIMING...Tonight

Severe thunderstorms are possible. Some thunderstorms could
produce damaging winds of 60 to 70 mph, and possibly a tornado.

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

Localized flash flooding is possible, particularly in low lying
and urban areas. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight
through Saturday.

LAZ016-023-025-MSZ047-241100-
Madison LA-Franklin LA-Tensas-Warren-
341 PM CDT Fri Apr 23 2021

This hazardous weather outlook is for portions of northeast
Louisiana, and west central Mississippi.

.DAY ONE...Tonight and Saturday

SEVERE THUNDERSTORMS
THREAT...Slight
TIMING...Tonight

FLOODING
THREAT...Elevated
TIMING...Tonight

Severe thunderstorms are possible. Some thunderstorms could
produce damaging winds of 60 to 70 mph, and possibly a tornado.

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

Areas of flash flooding likely and some roads could be flooded or
closed. Some structures may be potentially threatened by high
water. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight.

MSZ048-049-241100-
Hinds-Rankin-
341 PM CDT Fri Apr 23 2021

This hazardous weather outlook is for portions of central
Mississippi.

.DAY ONE...Tonight and Saturday

SEVERE THUNDERSTORMS
THREAT...Slight
TIMING...Mainly Tonight

FLOODING
THREAT...Elevated
TIMING...Tonight

Severe thunderstorms are possible. Some thunderstorms could
produce damaging winds of 60 to 70 mph, and possibly a tornado.

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

Areas of flash flooding likely and some roads could be flooded or
closed. Some structures may be potentially threatened by high
water. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight
through Saturday.

MSZ050>052-056>058-241100-
Scott-Newton-Lauderdale-Smith-Jasper-Clarke-
341 PM CDT Fri Apr 23 2021

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

.DAY ONE...Tonight and Saturday

SEVERE THUNDERSTORMS
THREAT...Slight
TIMING...Tonight through Saturday

FLOODING
THREAT...Elevated
TIMING...Tonight

Severe thunderstorms are possible. Some thunderstorms could
produce damaging winds of 60 to 70 mph, and possibly a tornado.

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

Areas of flash flooding likely and some roads could be flooded or
closed. Some structures may be potentially threatened by high
water. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight
through Saturday.

LAZ024-026-MSZ059>061-241100-
Catahoula-Concordia-Jefferson-Adams-Franklin MS-
341 PM CDT Fri Apr 23 2021

This hazardous weather outlook is for portions of northeast
Louisiana, and southwest Mississippi.

.DAY ONE...Tonight and Saturday

SEVERE THUNDERSTORMS
THREAT...Enhanced
TIMING...Tonight

FLOODING
THREAT...Significant
TIMING...Tonight

Severe thunderstorms are likely. Some thunderstorms may produce
damaging winds of 70 mph, and possibly a tornado.

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

Widespread flash flooding is likely and significant flooding is
possible. Many roads could be flooded or closed and some
structural flooding and water rescues are likely. Moderate river
flooding will also be likely.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight.

MSZ053-241100-
Claiborne-
341 PM CDT Fri Apr 23 2021

This hazardous weather outlook is for portions of southwest
Mississippi.

.DAY ONE...Tonight and Saturday

SEVERE THUNDERSTORMS
THREAT...Enhanced
TIMING...Tonight

FLOODING
THREAT...Elevated
TIMING...Tonight

Severe thunderstorms are likely. Some thunderstorms may produce
damaging winds of 70 mph, and possibly a tornado.

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

Areas of flash flooding likely and some roads could be flooded or
closed. Some structures may be potentially threatened by high
water. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight.

MSZ054-055-062>066-241100-
Copiah-Simpson-Lincoln-Lawrence-Jefferson Davis-Covington-Jones-
341 PM CDT Fri Apr 23 2021

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

.DAY ONE...Tonight and Saturday

SEVERE THUNDERSTORMS
THREAT...Enhanced
TIMING...Mainly Tonight

FLOODING
THREAT...Significant
TIMING...Tonight

Severe thunderstorms are likely. Some thunderstorms may produce
damaging winds of 70 mph, and possibly a tornado.

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

Widespread flash flooding is likely and significant flooding is
possible. Many roads could be flooded or closed and some
structural flooding and water rescues are likely. Moderate river
flooding will also be likely.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight
through Saturday.

MSZ072>074-241100-
Marion-Lamar-Forrest-
341 PM CDT Fri Apr 23 2021

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

.DAY ONE...Tonight and Saturday

SEVERE THUNDERSTORMS
THREAT...Enhanced
TIMING...Mainly Tonight

FLOODING
THREAT...Elevated
TIMING...Tonight

Severe thunderstorms are likely. Some thunderstorms may produce
damaging winds of 70 mph, and possibly a tornado.

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

Areas of flash flooding likely and some roads could be flooded or
closed. Some structures may be potentially threatened by high
water. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region tonight
through Saturday.

MSZ026-241100-
Grenada-
341 PM CDT Fri Apr 23 2021

This hazardous weather outlook is for portions of north central
Mississippi.

.DAY ONE...Tonight and Saturday

FLOODING
THREAT...Limited
TIMING...Tonight

SEVERE THUNDERSTORMS
THREAT...Marginal
TIMING...Saturday

Localized flash flooding is possible, particularly in low lying
and urban areas. Minor river flooding is also possible.

(https://www.weather.gov/images/jan/graphicast/2.png)

Isolated severe thunderstorms are possible. Some thunderstorms
could produce damaging wind gusts up to 60 mph.

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

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

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations may be needed for portions of the region Saturday.

19

&&

...HAZARD LEGEND...

*SEVERE THUNDERSTORMS*
High...Significant severe thunderstorms and tornadoes are
 likely with strong or violent tornadoes possible.
Moderate...Significant severe thunderstorms and tornadoes are
 likely with strong tornadoes possible.
Enhanced...Severe thunderstorms are likely and tornadoes are
 possible.
Slight...Severe thunderstorms and tornadoes are possible.
Marginal...Isolated severe thunderstorms are possible.

*FLOODING*
Extreme...Widespread and significant flooding is likely.
Significant...Widespread flash flooding is likely
 and significant flooding is possible.
Elevated...Areas of flash flooding likely.
Limited...Localized flash flooding is 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

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

...ADDITIONAL URLS FOR SEVERE WEATHER ISSUES...

Storm Prediction Center (SPC)...
   https://www.spc.noaa.gov/
Meso Analysis...
   https://www.spc.noaa.gov/exper/mesoanalysis/
Day 1 through 3 Outlooks...
   https://www.spc.noaa.gov/products/outlook/
Storm Reports...
   https://www.spc.noaa.gov/climo/online/
...ADDITIONAL URLS FOR FLOODING ISSUES...

Current Watches and Warnings...
   https://www.weather.gov/jan/safe_HeavyRain

Observed Precipitation Images...
   https://www.weather.gov/jan/precipmaps

River Forecast Center...
   https://www.weather.gov/lmrfc/
Significant River Flood Outlook...
   https://www.wpc.ncep.noaa.gov/nationalfloodoutlook/index.html
Day 1 through 3 Excessive Rainfall...
   https://www.wpc.ncep.noaa.gov/qpf/excess_rain.shtml
Excessive Rainfall Discussion...
   https://www.wpc.ncep.noaa.gov/discussions/qpferd.html
Day 1 through 7 QPF...
   https://www.wpc.ncep.noaa.gov/qpf/qpf2.shtml
QPF Discussion...
   https://www.wpc.ncep.noaa.gov/discussions/qpfpfd.html

In the hours before

Special weather statement, Apr 23, 8:39 PM CDT, 1 hour 25 minutes before
Special Weather Statement
National Weather Service Jackson MS
839 PM CDT Fri Apr 23 2021

LAZ026-MSZ060-240215-
Concordia LA-Adams MS-
839 PM CDT Fri Apr 23 2021

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL CONCORDIA PARISH IN
NORTHEASTERN LOUISIANA AND SOUTHERN ADAMS COUNTIES UNTIL 915 PM
CDT...

At 839 PM CDT, Meteorologists were tracking a strong thunderstorm
near Slocum, or 13 miles southeast of Monterey, moving northeast at
60 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Sibley around 850 PM CDT.
  Kingston around 900 PM CDT.

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.

&&

A Tornado Watch remains in effect until 400 AM CDT for northeastern
Louisiana...and southwestern Mississippi.

LAT...LON 3131 9170 3155 9133 3141 9119 3136 9128
      3136 9131 3131 9143 3132 9147 3129 9147
      3129 9149 3128 9150 3126 9148 3123 9149
      3121 9153 3124 9154 3124 9156 3122 9158
      3119 9159
TIME...MOT...LOC 0139Z 231DEG 54KT 3129 9157

TW
Local storm report, Apr 23, 9:00 PM CDT, 1 hour 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
900 PM CDT FRI APR 23 2021

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

0735 PM     HAIL             7 N LARTO               31.48N 91.90W
04/23/2021  E1.75 INCH       CATAHOULA          LA   LAW ENFORCEMENT

            HAIL UP TO THE SIZE OF GOLF BALLS FELL NORTH
            OF THE LARTO AREA. REPORT RELAYED VIA
            SHERIFFS OFFICE. TIME ESTIMATED FROM RADAR.

&&

NF
Special weather statement, Apr 23, 9:08 PM CDT, 56 minutes before
Special Weather Statement
National Weather Service Jackson MS
908 PM CDT Fri Apr 23 2021

MSZ072>074-240300-
Lamar MS-Marion MS-Forrest MS-
908 PM CDT Fri Apr 23 2021

...A STRONG THUNDERSTORM WILL AFFECT MARION...NORTHERN FORREST AND
NORTHERN LAMAR COUNTIES UNTIL 1000 PM CDT...

At 908 PM CDT, Meteorologists were tracking a strong thunderstorm
near Pickwick, or near Columbia, moving northeast at 55 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Improve around 920 PM CDT.
  Hattiesburg and Sumrall around 930 PM CDT.
  Oak Grove around 935 PM CDT.
  West Hattiesburg and Rawls Springs around 940 PM CDT.
  Petal around 945 PM CDT.
  Macedonia around 950 PM CDT.

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.

&&

A Tornado Watch remains in effect until 400 AM CDT for south central
and southeastern Mississippi.

LAT...LON 3123 8996 3144 8960 3143 8915 3139 8915
      3106 8983
TIME...MOT...LOC 0208Z 238DEG 47KT 3117 8978

TW
Special weather statement, Apr 23, 9:14 PM CDT, 50 minutes before
Special Weather Statement
National Weather Service Jackson MS
914 PM CDT Fri Apr 23 2021

MSZ053-054-059-061-062-240300-
Jefferson MS-Copiah MS-Lincoln MS-Franklin MS-Claiborne MS-
914 PM CDT Fri Apr 23 2021

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN CLAIBORNE...
NORTHWESTERN LINCOLN...EASTERN JEFFERSON...FRANKLIN AND WESTERN
COPIAH COUNTIES UNTIL 1000 PM CDT...

At 914 PM CDT, Meteorologists were tracking strong thunderstorms
along a line extending from near Blue Hill to Kirby to 9 miles
northeast of Woodville. Movement was east at 40 mph.

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

Strong thunderstorms will be near...
  Peyton, Pattison, Mcbride and Blue Hill around 920 PM CDT.
  Bude around 925 PM CDT.
  New Hope and Garden City around 930 PM CDT.
  Barlow around 935 PM CDT.
  Mccall Creek around 940 PM CDT.
  Dentville and Caseyville around 950 PM CDT.

Other locations impacted by these storms include Roxie and Meadville.

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.

&&

A Tornado Watch remains in effect until 400 AM CDT for central, south
central and southwestern Mississippi.

LAT...LON 3135 9115 3143 9116 3152 9111 3189 9102
      3202 9045 3161 9061 3135 9084 3135 9098
      3134 9099 3135 9102 3133 9106 3134 9107
      3133 9108 3132 9112
TIME...MOT...LOC 0214Z 251DEG 33KT 3182 9088 3150 9100 3122 9122

TW
Local storm report, Apr 23, 9:19 PM CDT, 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
919 PM CDT FRI APR 23 2021

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

0807 PM     HAIL             FERRIDAY                31.64N 91.56W
04/23/2021  E0.70 INCH       CONCORDIA          LA   PUBLIC

            HAIL TO AROUND THE SIZE OF DIMES FELL AT THE
            CIRCLE K IN FERRIDAY. TIME ESTIMATED FROM
            RADAR.

&&

NF
Special weather statement, Apr 23, 10:04 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Jackson MS
1004 PM CDT Fri Apr 23 2021

MSZ072-240330-
Marion MS-
1004 PM CDT Fri Apr 23 2021

...A STRONG THUNDERSTORM WILL AFFECT MARION COUNTY UNTIL 1030 PM
CDT...

At 1004 PM CDT, Meteorologists were tracking a strong thunderstorm
near Dexter, or near Kokomo, moving northeast at 50 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Pickwick around 1015 PM CDT.
  Columbia around 1020 PM CDT.
  Pinebur around 1025 PM CDT.
  Improve around 1030 PM CDT.

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.

&&

A Tornado Watch remains in effect until 400 AM CDT for south central
and southeastern Mississippi.

LAT...LON 3109 8992 3109 8993 3111 8993 3111 8994
      3113 8994 3113 8999 3125 9004 3138 8966
      3136 8965 3110 8966 3107 8989 3107 8992
TIME...MOT...LOC 0304Z 245DEG 45KT 3113 9001

TW

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 7:55 PM CDTSevere Thunderstorm WarningJANAdams, Jefferson29 min
Apr 23, 8:39 PM CDTSpecial Weather StatementJANAdams36 min
Apr 23, 9:08 PM CDTSpecial Weather StatementJANMarion52 min
Apr 23, 9:14 PM CDTSpecial Weather StatementJANFranklin, Jefferson46 min
Apr 23, 9:31 PM CDTRiver Flood WarningJANJones36 hr
Apr 23, 10:35 PM CDTSpecial Weather StatementJANForrest, Lamar55 min
Apr 24, 12:50 AM CDTSpecial Weather StatementJANWilkinson25 min
Apr 24, 12:55 AM CDTSpecial Weather StatementJANForrest50 min
Apr 24, 1:01 AM CDTSevere Thunderstorm WarningJANForrest, Lamar44 min
Apr 24, 1:30 AM CDTSevere Thunderstorm WarningJANFranklin, Lincoln39 min
Apr 24, 1:43 AM CDTSpecial Weather StatementJANJefferson Davis, Lawrence62 min
Apr 24, 1:56 AM CDTSevere Thunderstorm WarningJANCovington, Jefferson Davis, Lawrence64 min
Apr 24, 2:00 AM CDTSpecial Weather StatementJANForrest30 min
Apr 24, 2:05 AM CDTSevere Thunderstorm WarningJANLawrence25 min
Apr 24, 2:35 AM CDTSpecial Weather StatementJANHinds, Rankin55 min
Apr 24, 2:47 AM CDTSevere Thunderstorm WarningJANJasper, Jones, Smith47 min
Apr 24, 2:58 AM CDTSevere Thunderstorm WarningJANHinds, Madison, Rankin, Scott, Smith51 min
Apr 24, 3:44 AM CDTSpecial Weather StatementJANForrest31 min
Apr 24, 3:55 AM CDTSevere Thunderstorm WarningJANForrest6 min
Apr 24, 4:27 AM CDTSpecial Weather StatementJANWashington48 min
Apr 24, 6:23 AM CDTSpecial Weather StatementJANMadison, Rankin, Scott52 min
Apr 24, 8:56 AM CDTRiver Flood WarningJANLeake25 hr
Apr 24, 9:00 AM CDTRiver Flood WarningJANLawrence4 days
Apr 24, 9:00 AM CDTRiver Flood WarningJANCopiah, Simpson3 days
Apr 24, 9:00 AM CDTRiver Flood WarningJANMarion3 days
Apr 23, 7:20 PM CDTSpecial Weather StatementJANCatahoula, Concordia40 min
Apr 23, 7:30 PM CDTSevere Thunderstorm WarningJANCatahoula, Concordia45 min
Apr 23, 8:03 PM CDTSpecial Weather StatementJANConcordia27 min
Apr 23, 9:35 PM CDTSevere Thunderstorm WarningJANCatahoula, Concordia36 min
Apr 23, 11:38 PM CDTSpecial Weather StatementJANWest Feliciana22 min

Nearby

Special Weather Statements in Mississippi, 2021Every 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.