Alert archive / Mississippi / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 421, NWS Jackson, MS

June 18, 20234 counties in Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jun 18, 2023, 8:09 AM CDT for 4 counties in Mississippi. It was in force for 27 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
Jun 18, 2023, 8:09 AM CDT (13:09 UTC)
Expired
Jun 18, 2023, 8:36 AM CDT
In force
27 min
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Claiborne County, MS, Copiah County, MS, Jefferson County, MS, Lincoln County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 89 km from the middle of the area, began a volume at 13:13 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 18, 2:27 AM CDTSevere Thunderstorm WatchSPC10 hr
Jun 18, 6:11 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 1.2 hours before the alert went out and 86 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, Jackson, MS at 12:00Z on 2023-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1451 joules per kilogram.LCLLFCEL10008507005003002001001 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, Jackson, MS at 12:00Z on 2023-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.19395878Sfc1 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
1451 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
796 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
251 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

387 
WUUS54 KJAN 181309
SVRJAN
MSC021-029-063-085-181415-
/O.NEW.KJAN.SV.W.0421.230618T1309Z-230618T1415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
809 AM CDT Sun Jun 18 2023

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Southeastern Claiborne County in southwestern Mississippi...
  Northwestern Lincoln County in south central Mississippi...
  Eastern Jefferson County in southwestern Mississippi...
  Southwestern Copiah County in central Mississippi...

* Until 915 AM CDT.

* At 809 AM CDT, a severe thunderstorm was located over Mcbride, or
  17 miles southeast of Port Gibson, moving east at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Pleasant Hill around 815 AM CDT.
  Allen, Barlow and Caseyville around 830 AM CDT.
  Glancy around 855 AM CDT.
  Wesson and Martinsville around 915 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3166 9087 3187 9085 3189 9041 3162 9039
TIME...MOT...LOC 1309Z 274DEG 17KT 3178 9077 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CR
4 follow-up statements
568 
WWUS54 KJAN 181319
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
819 AM CDT Sun Jun 18 2023

MSC021-029-063-085-181415-
/O.CON.KJAN.SV.W.0421.000000T0000Z-230618T1415Z/
Claiborne MS-Lincoln MS-Jefferson MS-Copiah MS-
819 AM CDT Sun Jun 18 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM CDT
FOR SOUTHEASTERN CLAIBORNE...NORTHWESTERN LINCOLN...EAST CENTRAL
JEFFERSON AND SOUTHWESTERN COPIAH COUNTIES...

At 819 AM CDT, a severe thunderstorm was located near Allen, or 19
miles west of Hazlehurst, moving east at 20 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

This severe storm will be near...
  Allen, Barlow and Caseyville around 830 AM CDT.
  Glancy around 900 AM CDT.
  Hazlehurst around 910 AM CDT.
  Wesson and Martinsville around 915 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3166 9084 3187 9083 3189 9041 3162 9039
TIME...MOT...LOC 1319Z 274DEG 17KT 3178 9071 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CR
043 
WWUS54 KJAN 181327
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
827 AM CDT Sun Jun 18 2023

MSC021-029-063-085-181415-
/O.CON.KJAN.SV.W.0421.000000T0000Z-230618T1415Z/
Claiborne MS-Lincoln MS-Jefferson MS-Copiah MS-
827 AM CDT Sun Jun 18 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM CDT
FOR SOUTHEASTERN CLAIBORNE...NORTHWESTERN LINCOLN...EAST CENTRAL
JEFFERSON AND SOUTHWESTERN COPIAH COUNTIES...

At 826 AM CDT, a severe thunderstorm was located near Allen, or 14
miles southwest of Hazlehurst, moving east at 25 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

This severe storm will be near...
  Glancy around 840 AM CDT.
  Hazlehurst and Martinsville around 855 AM CDT.
  Wesson around 900 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3165 9078 3186 9079 3189 9041 3162 9039
TIME...MOT...LOC 1326Z 274DEG 22KT 3177 9061 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CR
485 
WWUS54 KJAN 181329
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
829 AM CDT Sun Jun 18 2023

MSC021-063-181339-
/O.CAN.KJAN.SV.W.0421.000000T0000Z-230618T1415Z/
Claiborne MS-Jefferson MS-
829 AM CDT Sun Jun 18 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLAIBORNE AND
EAST CENTRAL JEFFERSON COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 AM CDT for
central Mississippi. A Severe Thunderstorm Watch also remains in
effect until noon CDT for south central Mississippi.

LAT...LON 3164 9071 3187 9071 3189 9041 3162 9039
TIME...MOT...LOC 1329Z 274DEG 31KT 3177 9059 

$$

MSC029-085-181415-
/O.CON.KJAN.SV.W.0421.000000T0000Z-230618T1415Z/
Lincoln MS-Copiah MS-
829 AM CDT Sun Jun 18 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 AM CDT
FOR NORTHWESTERN LINCOLN AND SOUTHWESTERN COPIAH COUNTIES...

At 829 AM CDT, a severe thunderstorm was located near Allen, or 13
miles southwest of Hazlehurst, moving east at 35 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

This severe storm will be near...
  Glancy around 840 AM CDT.
  Martinsville around 845 AM CDT.
  Wesson around 850 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3164 9071 3187 9071 3189 9041 3162 9039
TIME...MOT...LOC 1329Z 274DEG 31KT 3177 9059 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CR
316 
WWUS54 KJAN 181336
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
836 AM CDT Sun Jun 18 2023

MSC029-085-181345-
/O.CAN.KJAN.SV.W.0421.000000T0000Z-230618T1415Z/
Lincoln MS-Copiah MS-
836 AM CDT Sun Jun 18 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LINCOLN AND
SOUTHWESTERN COPIAH COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 AM CDT for
central Mississippi. A Severe Thunderstorm Watch also remains in
effect until noon CDT for south central Mississippi.

LAT...LON 3164 9071 3187 9071 3189 9041 3162 9039
TIME...MOT...LOC 1333Z 274DEG 17KT 3177 9055 

$$

CR

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 18, 6:42 AM CDT, 1 hour 27 minutes earlier.

Area forecast discussion, Jun 18, 6:42 AM CDT, 1 hour 27 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Jackson MS
642 AM CDT Sun Jun 18 2023

...New AVIATION...

.DISCUSSION...
Issued at 450 AM CDT Sun Jun 18 2023

Today and Tonight...Quite a challenging forecast exists across the
forecast area today into tonight.  Currently, several perturbations
embedded in west northwest flow aloft are lined up from southeast
Arkansas back into east Oklahoma ahead of a closed low pressure
system over south central Kansas. These have sparked several
complexes of showers and storms across those areas overnight.  As
this low tracks east into the Mid-Mississippi River Valley through
the course of the day and into the Ohio River Valley tonight, these
perturbations/disturbances and any subsequent or associated east
southeast advancing outflow boundaries will all aid in the
development of showers and storm across the region, with multiple
rounds of storms possible from early this morning into late tonight.

While the overall synoptic pattern hasn't changed, high-res models
are currently struggling with the placement and propagation of these
boundaries and such. Therefore, it's making exact timing of these
multiple rounds of storms very difficult to nail down during the
period.  That said, because it's now moving into the far northwest
portions of the Delta region, the first round of severe storms is
now moving through the northern half of the CWA as I type. As the
comnplex exist the CWA here in a few hours, the question is will
it leave a boundary in it's wake, and if, so where will it reside
for possible storm development later today. Therefore, attention
will need to strongly be paid locally as well as upstream to real
time satellite, observations, of course radar, and other mesoanalysis
to better depict the timing of these rounds of storms as well as
the areas affected.

With the airmass over the region becoming strongly unstable through
the day with at least 3500-4500 J/kg of SBCAPE forecast, coupled
with very steep mid-level lapse rates on the order of 7.5-8.5 C/km
and 29-32 vertical totals, and strong deep layer wind shear around
60 knots, severe storms are expected across the forecast area.  This
includes the potential for super cells as well as fast-moving
organized bowing lines of storms.  Damaging winds of 70 mph and
large hail up to tennis ball size are possible, with the largest
hail threat expected this afternoon and evening.  Also, a tornado
cannot be ruled out. In addition, near constant lightning strikes
are expected with storms, along with very heavy downpours.  With
several rounds of storms forecast, and thus the training of storms
possible, up to 3 inches of rain in a short amount of time is
possible and could result in flash flooding.  The severe threat will
continue into late tonight, with activity currently forecast to exit
the forecast area by day break Monday morning.

Lastly, if widespread cirrus debris from convection to the north is
able to vacate the area this afternoon, highs will warm into the
middle 90s across mainly east central Louisiana and southwest
Mississippi.  These hot temperatures combined with the humid
conditions, could result in dangerous heat stress conditions across
mainly the southwest half of the CWA. /19/

Monday into Saturday...Synoptic pattern will consist of building
subtropical ridge from Mexico through the Southern Plains up into
the Mid West to Great Lakes. This will help drive the upper low to
cutoff & become closed off over the southeast states & gradually
build southward & retrograde by mid- late week. This will help
drier profiles closer to an inch & a quarter PWs will build in
Monday into Tuesday. There will be some residual shear &
instability for isolated but more diurnal severe convection to
start the week on Monday & another round into Tuesday. Kept
mention of "Marginal" for areas southeast of the Natchez Trace
corridor for Monday & south of Interstate 20 into Tuesday. Main
concerns are wind & hail, with bulk shear slightly relaxing (i.e.
30-35kts) & profiles becoming more unidirectional, favoring single
& multicell. Highest rain & storm chances will be east of
Interstate 55, with less coverage in the Mississippi River
corridor. Some lingering jet dynamics help some redevelopment
before midday Tuesday.

Heat will build south of Interstate 20 & kept same areal
configuration of heat stress concerns into Monday & "Limited"
potential into Tuesday for extreme southwest Mississippi & northeast
Louisiana. With scattered rain coverage but likely less cloud cover
than Sunday, an advisory may be needed in future updates. With the
retrograding closed low, moisture build from east to west & best
convergence & diurnal rain/storm chances to be southeast of the
Natchez Trace corridor & especially east of Interstate 55. Thermo
profiles become slightly less oppressive & highs peak below normal
in the mid-upper 80s, with heat stress concerns much less as heat
indices only peak into the mid-upper 90s. Highs gradually moderate
back near normal in the low 90s into next weekend. Rain & storm
chances will unfortunately persist into next weekend as closed low
becomes more open trough & sits over the southeast states &
convergence persists. /DC/

&&

.AVIATION...
(12Z TAFS)
Issued at 641 AM CDT Sun Jun 18 2023

Widespread convection and patchy fog/low stratus across the area
this morning is resulting in a flight categories ranging from
VFR/IFR. Scattered to widespread convection will remain possible
across the area throughout most of the forecast period. Some of
the storms will be severe and capable of producing wind gusts of
61 knots and large hail up to the size of tennis balls or larger.
Near continuous lightning strikes and heavy downpours are expected
to accompany all of today's convection as well. Away from
convection, winds will be southerly between 5-10 knots. /19/

&&

.PRELIMINARY POINT TEMPS/POPS...
Jackson       90  72  90  71 /  80  70  40  20
Meridian      87  71  90  69 /  70  60  60  30
Vicksburg     92  72  92  73 /  70  60  20  20
Hattiesburg   91  74  92  73 /  70  40  70  40
Natchez       94  74  94  73 /  40  50  30  30
Greenville    86  71  89  70 /  90  60  10  10
Greenwood     88  71  90  70 /  90  80  20  10

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...None.
LA...None.
AR...None.
&&

19
Hazardous weather outlook, Jun 18, 4:48 AM CDT, 3 hours 21 minutes before
Hazardous Weather Outlook
National Weather Service Jackson MS
448 AM CDT Sun Jun 18 2023

ARZ074-075-LAZ007>009-015-016-MSZ018-019-025>052-056>058-182000-
Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland-
Madison LA-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-Scott-Newton-Lauderdale-
Smith-Jasper-Clarke-
448 AM CDT Sun Jun 18 2023

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

.DAY ONE...Today and Tonight...

SEVERE THUNDERSTORMS
THREAT...Enhanced
TIMING...Today through Tonight

FLOODING
THREAT...Limited
TIMING...Today through Tonight

Severe thunderstorms are likely . Some thunderstorms may produce
damaging winds up to 70 mph and large hail up to tennis ball
size.  A tornado cannot be ruled out.

(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...Monday through Saturday...

Isolated severe thunderstorms are possible for portions of the
outlook area Monday afternoon and evening.

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

Isolated severe thunderstorms are possible again over portions of
the outlook area Tuesday afternoon and evening.

(https://www.weather.gov/images/jan/graphicast/4.png)

Dangerous heat with maximum heat index values of 106 to
110 degrees is expected over southwest portions of the outlook
area again Monday.

(https://www.weather.gov/images/jan/graphicast/5.png)

Dangerous heat with maximum heat index values near 105 degrees is
possible for portions of the outlook area again Monday.

(https://www.weather.gov/images/jan/graphicast/5.png)

.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 Tuesday
night and today through Monday night.

LAZ023-025-MSZ053>055-059-061>066-072>074-182000-
Franklin LA-Tensas-Claiborne-Copiah-Simpson-Jefferson-Franklin MS-
Lincoln-Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar-
Forrest-
448 AM CDT Sun Jun 18 2023

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

.DAY ONE...Today and Tonight...

SEVERE THUNDERSTORMS
THREAT...Enhanced
TIMING...Today through Tonight

FLOODING
THREAT...Limited
TIMING...Today through Tonight

DANGEROUS HEAT
THREAT...Limited
TIMING...Today

Severe thunderstorms are likely . Some thunderstorms may produce
damaging winds up to 70 mph and large hail up to tennis ball
size.  A tornado cannot be ruled out.

(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)

Caution is advised for possible dangerous heat as heat index
values peak near 105 degrees. Heat exhaustion will be possible
with outdoor activity.

(https://www.weather.gov/images/jan/graphicast/5.png)

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

Isolated severe thunderstorms are possible for portions of the
outlook area Monday afternoon and evening.

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

Isolated severe thunderstorms are possible again over portions of
the outlook area Tuesday afternoon and evening.

(https://www.weather.gov/images/jan/graphicast/4.png)

Dangerous heat with maximum heat index values of 106 to
110 degrees is expected over southwest portions of the outlook
area again Monday.

(https://www.weather.gov/images/jan/graphicast/5.png)

Dangerous heat with maximum heat index values near 105 degrees is
possible for portions of the outlook area again Monday.

(https://www.weather.gov/images/jan/graphicast/5.png)

.

.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 Tuesday
night and today through Monday night.

LAZ024-026-MSZ060-182000-
Catahoula-Concordia-Adams-
448 AM CDT Sun Jun 18 2023

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

.DAY ONE...Today and Tonight...

SEVERE THUNDERSTORMS
THREAT...Enhanced
TIMING...Today through Tonight

FLOODING
THREAT...Limited
TIMING...Today through Tonight

DANGEROUS HEAT
THREAT...Elevated
TIMING...Today

Severe thunderstorms are likely . Some thunderstorms may produce
damaging winds up to 70 mph and large hail up to tennis ball
size.  A tornado cannot be ruled out.

(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)

Dangerous heat likely with peak heat index values ranging from
106 to 110 degrees. Heat exhaustion will be likely with outdoor
activity.

(https://www.weather.gov/images/jan/graphicast/5.png)

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

Isolated severe thunderstorms are possible for portions of the
outlook area Monday afternoon and evening.

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

Isolated severe thunderstorms are possible again over portions of
the outlook area Tuesday afternoon and evening.

(https://www.weather.gov/images/jan/graphicast/4.png)

Dangerous heat with maximum heat index values of 106 to
110 degrees is expected over southwest portions of the  outlook
area again Monday.

(https://www.weather.gov/images/jan/graphicast/5.png)

Dangerous heat with maximum heat index values near 105 degrees is
possible for portions of the outlook area again Monday.

(https://www.weather.gov/images/jan/graphicast/5.png)

.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 Tuesday
night and today through tonight.

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.

*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

...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

Local storm report, Jun 18, 7:47 AM CDT, 22 minutes before
Preliminary Local Storm Report
National Weather Service Jackson MS
747 AM CDT Sun Jun 18 2023

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

0620 AM     Tstm Wnd Dmg     3 SSW Boon              33.07N 88.97W
06/18/2023                   Winston            MS   Emergency Mngr

            trees down.

&&

CE
Special weather statement, Jun 18, 7:47 AM CDT, 22 minutes before
Special Weather Statement
National Weather Service Jackson MS
747 AM CDT Sun Jun 18 2023

MSZ053-054-059-181315-
Jefferson MS-Copiah MS-Claiborne MS-
747 AM CDT Sun Jun 18 2023

...A strong thunderstorm will impact portions of southern Claiborne,
central Jefferson and western Copiah Counties through 815 AM CDT...

At 747 AM CDT, Doppler radar was tracking a strong thunderstorm over
Lorman, or near Fayette, moving east at 30 mph.

HAZARD...Penny size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to outdoor objects is possible.

This strong thunderstorm will be near...
  Pattison and Blue Hill around 805 AM CDT.
  Peyton and Mcbride around 810 AM CDT.
  Hermanville around 815 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A Severe Thunderstorm Watch remains in effect until 1000 AM CDT for
central and southwestern Mississippi. A Severe Thunderstorm Watch
also remains in effect until noon CDT for south central Mississippi.

&&

LAT...LON 3165 9108 3188 9121 3205 9069 3205 9052
      3174 9043
TIME...MOT...LOC 1247Z 251DEG 27KT 3181 9102

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<40 MPH

CR
Local storm report, Jun 18, 7:48 AM CDT, 21 minutes before
Preliminary Local Storm Report
National Weather Service Jackson MS
748 AM CDT Sun Jun 18 2023

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

0617 AM     Tstm Wnd Dmg     3 W Vernon              32.98N 88.98W
06/18/2023                   Winston            MS   Emergency Mngr

            Trees down along Hwy 490.

&&

CE
Local storm report, Jun 18, 7:50 AM CDT, 19 minutes before
Preliminary Local Storm Report
National Weather Service Jackson MS
750 AM CDT Sun Jun 18 2023

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

0620 AM     Tstm Wnd Dmg     1 WSW Ellison Ridge     33.06N 88.90W
06/18/2023                   Winston            MS   Emergency Mngr

            Tree on a home along Eaves Road, no
            injuries.

&&

CE
Local storm report, Jun 18, 8:03 AM CDT, 6 minutes before
Preliminary Local Storm Report
National Weather Service Jackson MS
803 AM CDT Sun Jun 18 2023

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

0632 AM     Hail             Prentiss                31.60N 89.87W
06/18/2023  E2.00 inch       Jefferson Davis    MS   Public

            Social media post via twitter show 2 inch
            hail in Crystal Springs.

&&

CR
Local storm report, Jun 18, 8:04 AM CDT, 5 minutes before
Preliminary Local Storm Report
National Weather Service Jackson MS
804 AM CDT Sun Jun 18 2023

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

0505 AM     Tstm Wnd Dmg     1 SW Dunn               32.45N 91.59W
06/18/2023                   Richland           LA   Law Enforcement

            A couple lines down and power out on the E
            side of the parish.

&&

CE

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 8:09 PM CDTSpecial Weather StatementJANForrest66 min
Jun 18, 3:32 AM CDTSevere Thunderstorm WarningJANHumphreys, Issaquena, Sharkey, Washington73 min
Jun 18, 3:55 AM CDTSevere Thunderstorm WarningJANHumphreys, Issaquena, Sharkey, Washington, Yazoo65 min
Jun 18, 4:35 AM CDTSpecial Weather StatementJANCarroll, Montgomery55 min
Jun 18, 4:56 AM CDTSevere Thunderstorm WarningJANClaiborne, Copiah, Hinds, Issaquena, Madison, Sharkey and 2 more64 min
Jun 18, 5:04 AM CDTSpecial Weather StatementJANLeake56 min
Jun 18, 5:04 AM CDTSpecial Weather StatementJANLeake41 min
Jun 18, 5:04 AM CDTSevere Thunderstorm WarningJANWarren56 min
Jun 18, 5:38 AM CDTSevere Thunderstorm WarningJANClaiborne, Copiah, Jefferson67 min
Jun 18, 5:49 AM CDTSevere Thunderstorm Warning Considerable damage threatJANCopiah, Hinds, Rankin, Scott, Simpson, Smith71 min
Jun 18, 5:53 AM CDTSevere Thunderstorm WarningJANAttala, Choctaw, Leake, Neshoba, Winston52 min
Jun 18, 5:57 AM CDTSevere Thunderstorm WarningJANHinds33 min
Jun 18, 6:17 AM CDTSpecial Weather StatementJANKemper43 min
Jun 18, 6:29 AM CDTSevere Thunderstorm WarningJANClay, Kemper, Lowndes, Noxubee, Oktibbeha50 min
Jun 18, 6:41 AM CDTSevere Thunderstorm Warning Destructive damage threatJANCopiah, Jefferson Davis, Lawrence, Lincoln, Simpson64 min
Jun 18, 7:38 AM CDTSevere Thunderstorm WarningJANCovington, Jefferson Davis, Jones67 min
Jun 18, 7:47 AM CDTSpecial Weather StatementJANClaiborne, Jefferson28 min
Jun 18, 8:14 AM CDTSevere Thunderstorm WarningJANJones46 min
Jun 18, 8:38 AM CDTSevere Thunderstorm WarningJANJones18 min
Jun 18, 8:45 AM CDTSpecial Weather StatementJANHinds45 min
Jun 18, 8:49 AM CDTSevere Thunderstorm Warning Considerable damage threatJANHinds41 min
Jun 18, 9:40 AM CDTSpecial Weather StatementJANScott50 min
Jun 18, 9:49 AM CDTSevere Thunderstorm WarningJANJasper, Newton, Scott, Smith56 min
Jun 18, 10:24 AM CDTSpecial Weather StatementJANJones51 min
Jun 18, 10:33 AM CDTSevere Thunderstorm Warning Considerable damage threatJANClarke, Lauderdale42 min
Jun 18, 10:39 AM CDTSevere Thunderstorm WarningJANClarke, Jasper, Jones40 min
Jun 18, 10:53 AM CDTTornado WarningJANClarke22 min
Jun 18, 1:45 PM CDTFlood WatchJANAttala, Carroll, Choctaw, Clarke, Clay, Copiah and 29 more17 hr
Jun 18, 4:07 PM CDTRiver Flood WarningJANLeake3 days
Jun 18, 4:07 PM CDTRiver Flood WarningJANNeshoba5 days
Jun 18, 4:07 PM CDTRiver Flood WarningJANLeake21 days
Jun 18, 4:11 PM CDTRiver Flood WarningJANJones18 hr
Jun 18, 4:11 PM CDTRiver Flood WarningJANClarke4 days
Jun 18, 4:12 PM CDTRiver Flood WarningJANAttala, Holmes7 days
Jun 18, 6:44 PM CDTSevere Thunderstorm WarningJANClaiborne, Hinds, Warren61 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2023Every severe thunderstorm warning in 2023

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.