Alert archive / Mississippi / Special Weather Statements in 2018

Special Weather Statement, NWS Jackson, MS

February 24, 2018Yazoo County, Mississippi

NWS Jackson, MS issued this special weather statement at Feb 24, 2018, 5:21 PM CST for Yazoo County, Mississippi. It was in force for 24 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
Feb 24, 2018, 5:21 PM CST (23:21 UTC)
Expired
Feb 24, 2018, 5:45 PM CST
In force
24 min
Issued by
NWS Jackson, MS

County Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 64 km from the middle of the area, began a volume at 23:24 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

Little Rock, AR (KBYH), launched 12:00Z, 11.4 hours before the alert went out and 222 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, Little Rock, AR at 12:00Z on 2018-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 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, Little Rock, AR at 12:00Z on 2018-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 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
42 J/kg
Mixed-layer CIN
-186 J/kg
Mixed-layer LCL
568 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
196 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 Feb 24, 3:58 PM CST, 1 hour 23 minutes earlier.

Area forecast discussion, Feb 24, 3:58 PM CST, 1 hour 23 minutes before
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Hazardous weather outlook, Feb 24, 2:42 PM CST, 2 hours 39 minutes before
Hazardous Weather Outlook
National Weather Service Jackson MS
242 PM CST Sat Feb 24 2018

ARZ074-075-LAZ007-MSZ018-019-025-034-251200-
Ashley-Chicot-Morehouse-Bolivar-Sunflower-Leflore-Washington-
242 PM CST Sat Feb 24 2018

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

.DAY ONE...Tonight and Sunday...

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

FLOODING
THREAT...Elevated
TIMING...Tonight

NON-THUNDERSTORM WINDS
THREAT...Elevated
TIMING...Tonight

A wind advisory is in effect for southerly winds gusting up to 45
mph this afternoon and evening.

For tonight, a squall line containing damaging winds and potential
tornadoes will move across the area late this evening. Brief, but
intense rainfall rates could also result in flash flooding, and
further aggrevate ongoing river flooding.

(www.weather.gov/images/jan/graphicast/image1.png)
(www.weather.gov/images/jan/graphicast/image2.png)
(www.weather.gov/images/jan/graphicast/image3.png)

.DAYS TWO THROUGH SEVEN...Sunday night through Friday...

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.

LAZ025-MSZ030>033-036>039-042>045-047-048-251200-
Tensas-Clay-Lowndes-Choctaw-Oktibbeha-Holmes-Attala-Winston-
Noxubee-Yazoo-Madison MS-Leake-Neshoba-Warren-Hinds-
242 PM CST Sat Feb 24 2018

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

.DAY ONE...Tonight and Sunday...

FLOODING
THREAT...Limited
TIMING...Tonight through Sunday

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

NON-THUNDERSTORM WINDS
THREAT...Limited
TIMING...Tonight

Southerly winds will gust up to 35 mph this afternoon and
evening.

For tonight, a squall line containing the potential for damaging
winds and perhaps a tornado will move across the area, mainly from
late evening into the early morning hours on Sunday. Brief, but
intense rainfall rates could result in flash flooding, and further
aggrevate ongoing river flooding.

(www.weather.gov/images/jan/graphicast/image1.png)
(www.weather.gov/images/jan/graphicast/image2.png)
(www.weather.gov/images/jan/graphicast/image3.png)

.DAYS TWO THROUGH SEVEN...Sunday night through Friday...

There is limited threat for flash flooding as another round of
potentially heavy rainfall is expected from late Sunday through
Sunday night.

(www.weather.gov/images/jan/graphicast/image4.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 tonight.

MSZ028-029-251200-
Montgomery-Webster-
242 PM CST Sat Feb 24 2018

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

.DAY ONE...Tonight and Sunday...

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

FLOODING
THREAT...Limited
TIMING...Tonight

NON-THUNDERSTORM WINDS
THREAT...Limited
TIMING...Tonight

Southerly winds will gust up to 35 mph this afternoon and
evening.

For tonight, a squall line containing the potential for damaging
winds and perhaps a tornado will move across the area, mainly from
late evening into the early morning hours on Sunday. Brief, but
intense rainfall rates could result in flash flooding, and further
aggrevate ongoing river flooding.

(www.weather.gov/images/jan/graphicast/image1.png)
(www.weather.gov/images/jan/graphicast/image2.png)
(www.weather.gov/images/jan/graphicast/image3.png)

.DAYS TWO THROUGH SEVEN...Sunday night through Friday...

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.

LAZ008-009-015-016-023-MSZ035-040-041-251200-
West Carroll-East Carroll-Richland-Madison LA-Franklin LA-
Humphreys-Issaquena-Sharkey-
242 PM CST Sat Feb 24 2018

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

.DAY ONE...Tonight and Sunday...

FLOODING
THREAT...Elevated
TIMING...Mainly Tonight

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

NON-THUNDERSTORM WINDS
THREAT...Elevated
TIMING...Tonight

A wind advisory is in effect for southerly winds gusting up to 45
mph this afternoon and evening.

For tonight, a squall line containing the potential for damaging
winds and perhaps a tornado will move across the area, mainly from
late evening into the early morning. Brief, but intense rainfall
rates could cause flash flooding.

(www.weather.gov/images/jan/graphicast/image1.png)
(www.weather.gov/images/jan/graphicast/image2.png)
(www.weather.gov/images/jan/graphicast/image3.png)

.DAYS TWO THROUGH SEVEN...Sunday night through Friday...

There is limited threat for flash flooding as another round of
potentially heavy rainfall is expected from late Sunday through
Sunday night.

(www.weather.gov/images/jan/graphicast/image4.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 tonight.

LAZ024-026-MSZ046-049>066-072>074-251200-
Catahoula-Concordia-Kemper-Rankin-Scott-Newton-Lauderdale-
Claiborne-Copiah-Simpson-Smith-Jasper-Clarke-Jefferson-Adams-
Franklin MS-Lincoln-Lawrence-Jefferson Davis-Covington-Jones-
Marion-Lamar-Forrest-
242 PM CST Sat Feb 24 2018

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

.DAY ONE...Tonight and Sunday...

FLOODING
THREAT...Limited
TIMING...Tonight through Sunday

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

NON-THUNDERSTORM WINDS
THREAT...Limited
TIMING...Tonight

Southerly winds will gust up to 30 to 35 mph this afternoon and
evening.

For tonight, a squall line containing the potential for damaging
winds will move across the area, mainly from late evening into
the early morning. Brief, but intense rainfall rates could cause
flash flooding.

(www.weather.gov/images/jan/graphicast/image1.png)
(www.weather.gov/images/jan/graphicast/image2.png)
(www.weather.gov/images/jan/graphicast/image3.png)

.DAYS TWO THROUGH SEVEN...Sunday night through Friday...

There is limited threat for flash flooding as another round of
potentially heavy rainfall is expected from late Sunday through
Sunday night.

(www.weather.gov/images/jan/graphicast/image4.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 tonight.

MSZ026-027-251200-
Grenada-Carroll-
242 PM CST Sat Feb 24 2018

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

.DAY ONE...Tonight and Sunday...

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

FLOODING
THREAT...Elevated
TIMING...Tonight

NON-THUNDERSTORM WINDS
THREAT...Elevated
TIMING...Tonight

A wind advisory is in effect for southerly winds gusting up to 45
mph this afternoon and evening.

For tonight, a squall line containing the potential for damaging
winds and perhaps a tornado will move across the area, mainly from
late evening into the early morning. Brief, but intense rainfall
rates could cause flash flooding.

(www.weather.gov/images/jan/graphicast/image1.png)
(www.weather.gov/images/jan/graphicast/image2.png)
(www.weather.gov/images/jan/graphicast/image3.png)

.DAYS TWO THROUGH SEVEN...Sunday night through Friday...

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.

19

&&

...HAZARD LEGEND...

*SEVERE THUNDERSTORMS*
High...Significant severe thunderstorms are expected.
Moderate...Severe storms expected with significant
 severe weather possible.
Enhanced...Severe storms expected.
Slight...Severe storms possible.
Marginal...Isolated severe storms possible.

*FLOODING*
Extreme...Confident in significant flooding.
Significant...Significant flooding possible.
Elevated...Confident in flooding.
Limited...Flooding possible.

*NON-THUNDERSTORM WINDS*
Extreme...Sustained winds 50 mph or greater or wind gusts 65 mph
 or greater.
Significant...Sustained winds 40-49 mph or wind gusts 58-64 mph.
Elevated...Sustained winds 30-39 mph or wind gusts 45-57 mph.
Limited...Sustained winds 20-29 mph or wind gusts 30 to 44 mph.

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

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

Find NWS JAN on Facebook...
   www.facebook.com/NWSJacksonMS
Follow NWS JAN on Twitter...
   @NWSJacksonMS
Follow NWS JAN on Youtube...
   www.youtube.com/user/NWSJacksonMiss

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

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

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

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

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

In the hours before

Special weather statement, Feb 24, 5:19 PM CST, 2 minutes before
Special Weather Statement
National Weather Service Jackson MS
519 PM CST SAT FEB 24 2018

MSZ027-036-242345-
Carroll MS-Holmes MS-
519 PM CST SAT FEB 24 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN HOLMES AND
SOUTHWESTERN CARROLL COUNTIES UNTIL 545 PM CST...

At 519 PM CST, Meteorologists were tracking a strong thunderstorm
near Tchula, or 12 miles northeast of Thornton, moving northeast at
45 mph.

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

This strong thunderstorm will be near...
  Black Hawk and Seven Pines around 535 PM CST.
  Emory around 540 PM CST.
  Coila around 545 PM CST.

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.

This storm 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 3312 9017 3320 9025 3345 9002 3324 8977
TIME...MOT...LOC 2319Z 227DEG 37KT 3318 9016

NF
Special weather statement, Feb 24, 5:21 PM CST, 0 minutes before
Special Weather Statement
National Weather Service Jackson MS
521 PM CST SAT FEB 24 2018

MSZ042-242345-
Yazoo MS-
521 PM CST SAT FEB 24 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN YAZOO COUNTY UNTIL
545 PM CST...

At 521 PM CST, Meteorologists were tracking a strong thunderstorm
over Little Yazoo, or 9 miles south of Yazoo City, moving northeast
at 40 mph.

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

This strong thunderstorm will be near...
  Benton around 535 PM CST.

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.

This storm 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 3289 9000 3288 8997 3286 8998 3285 8999
      3266 9036 3272 9044 3298 9025
TIME...MOT...LOC 2321Z 224DEG 35KT 3273 9035

NF

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 24, 8:08 AM CSTRiver Flood WarningJANMadison, Yazoo25 days
Feb 24, 8:17 AM CSTRiver Flood WarningJANNeshoba6 days
Feb 24, 5:19 PM CSTSpecial Weather StatementJANHolmes26 min
Feb 24, 5:38 PM CSTSpecial Weather StatementJANCarroll37 min
Feb 24, 5:47 PM CSTSpecial Weather StatementJANHolmes28 min

Nearby

Special Weather Statements in Mississippi, 2018Every special weather statement 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.