Alert archive / Mississippi / Special Weather Statements in 2018

Special Weather Statement, NWS Jackson, MS

April 22, 2018Noxubee County, Mississippi

NWS Jackson, MS issued this special weather statement at Apr 22, 2018, 3:39 PM CDT for Noxubee County, Mississippi. It was in force for 36 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 22, 2018, 3:39 PM CDT (20:39 UTC)
Expired
Apr 22, 2018, 4:15 PM CDT
In force
36 min
Issued by
NWS Jackson, MS

County Noxubee County, MS

The radar

The Columbus AFB radar (KGWX), 104 km from the middle of the area, began a volume at 20:38 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

Birmingham, AL (KBMX), launched 12:00Z, 8.7 hours before the alert went out and 162 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, Birmingham, AL at 12:00Z on 2018-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 29 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, Birmingham, AL at 12:00Z on 2018-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 286 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
29 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
562 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
286 m²/s²
0-3 km storm-relative helicity
264 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 Apr 22, 12:30 PM CDT, 3 hours 9 minutes earlier.

Area forecast discussion, Apr 22, 12:30 PM CDT, 3 hours 9 minutes before
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Hazardous weather outlook, Apr 22, 12:35 PM CDT, 3 hours 4 minutes before
Hazardous Weather Outlook
National Weather Service Jackson MS
1235 PM CDT Sun Apr 22 2018

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025-034>036-
040>043-047-048-053-054-059>062-231745-
Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland-
Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar-
Sunflower-Leflore-Washington-Humphreys-Holmes-Issaquena-Sharkey-
Yazoo-Madison MS-Warren-Hinds-Claiborne-Copiah-Jefferson-Adams-
Franklin MS-Lincoln-
1235 PM CDT Sun Apr 22 2018

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

.DAY ONE...The rest of Today and Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

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 is not expected through next Saturday.

MSZ029>033-037>039-044>046-050>052-055>058-063>066-072>074-231745-
Webster-Clay-Lowndes-Choctaw-Oktibbeha-Attala-Winston-Noxubee-
Leake-Neshoba-Kemper-Scott-Newton-Lauderdale-Simpson-Smith-Jasper-
Clarke-Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar-
Forrest-
1235 PM CDT Sun Apr 22 2018

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

.DAY ONE...The rest of Today and Tonight

SEVERE THUNDERSTORMS
THREAT...Marginal
TIMING...through 5 PM

FLOODING
THREAT...Limited
TIMING...through 5 PM

Isolated severe storms capable of producing damaging wind gusts
and a tornado or two are possible through early evening.

(https://www.weather.gov/images/jan/graphicast/image2.png)

Localized rainfall amounts of up to 1 to 3 inches are possible
through early this evening. This could result in localized flash
flooding.

(https://www.weather.gov/images/jan/graphicast/image1.png)

.DAYS TWO THROUGH SEVEN...Monday through Saturday

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 the rest
of today.

MSZ026>028-049-231745-
Grenada-Carroll-Montgomery-Rankin-
1235 PM CDT Sun Apr 22 2018

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

.DAY ONE...The rest of Today and Tonight

FLOODING
THREAT...Limited
TIMING...through early this afternoon

Localized rainfall amounts of up to 1 to 3 inches are possible
through late this afternoon. This could result in localized flash
flooding.

(https://www.weather.gov/images/jan/graphicast/image1.png)

.DAYS TWO THROUGH SEVEN...Monday through Saturday

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 is not expected through next Saturday.

DL

&&

...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.

...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)...
   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...
   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...
   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, Apr 22, 10:50 AM CDT, 4 hours 49 minutes before
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Special weather statement, Apr 22, 11:04 AM CDT, 4 hours 35 minutes before
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Special weather statement, Apr 22, 11:23 AM CDT, 4 hours 16 minutes before
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Special weather statement, Apr 22, 11:47 AM CDT, 3 hours 52 minutes before
Special Weather Statement
National Weather Service Jackson MS
1147 AM CDT SUN APR 22 2018

MSZ055-063-064-221730-
Lawrence MS-Jefferson Davis MS-Simpson MS-
1147 AM CDT SUN APR 22 2018

...GUSTY SHOWERS WILL AFFECT SOUTH SIMPSON...NORTHEASTERN LAWRENCE
AND NORTHWESTERN JEFFERSON DAVIS COUNTIES THROUGH 1230 PM CDT...

At 1146 AM CDT, Meteorologists were tracking a showers with gusty
wind near Hebron, or 14 miles south of Pinola, moving northeast at
25 mph.

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

Locations impacted include...
Shivers, Clem, New Hebron and Silver Creek.

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.

&&

LAT...LON 3172 9011 3191 8986 3175 8976 3166 8976
      3157 9004
TIME...MOT...LOC 1646Z 241DEG 21KT 3167 9002

DL
Special weather statement, Apr 22, 12:34 PM CDT, 3 hours 5 minutes before
Special Weather Statement
National Weather Service Jackson MS
1234 PM CDT SUN APR 22 2018

MSZ055-056-221815-
Smith MS-Simpson MS-
1234 PM CDT SUN APR 22 2018

...A GUSTY THUNDERSTORM WILL AFFECT EASTERN SIMPSON AND CENTRAL
SMITH COUNTIES UNTIL 115 PM CDT...

At 1233 PM CDT, Meteorologists were tracking a gusty thunderstorm
near Sanatorium, or near Magee, moving northeast at 30 mph.

Winds in excess of 40 mph will be possible with this storm.

This strong thunderstorm will be near...
  Sanatorium around 1240 PM CDT.
  Magee around 1245 PM CDT.
  Martinville around 1250 PM CDT.
  Raleigh and Center Ridge around 115 PM CDT.

Other locations impacted by this storm include Sylvarena and Mize.

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 3186 8994 3205 8976 3205 8973 3208 8973
      3220 8962 3198 8932 3178 8969 3177 8986
TIME...MOT...LOC 1733Z 232DEG 25KT 3184 8981

BYB
Special weather statement, Apr 22, 3:39 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Jackson MS
339 PM CDT SUN APR 22 2018

MSZ039-046-222115-
Kemper MS-Noxubee MS-
339 PM CDT SUN APR 22 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN NOXUBEE AND NORTH
CENTRAL KEMPER COUNTIES UNTIL 415 PM CDT...

At 338 PM CDT, Meteorologists were tracking a strong thunderstorm
near Gholson, or 12 miles east of Preston, moving northeast at 45
mph.

Winds in excess of 40 mph will be possible with this storm.

This strong thunderstorm will be near...
  Macon and Paulette around 355 PM CDT.

Other locations impacted by this storm include Shuqualak.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3295 8835 3279 8859 3289 8877 3320 8861
      3307 8833
TIME...MOT...LOC 2038Z 218DEG 39KT 3291 8862

17

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 9:35 AM CDTSpecial Weather StatementJANJefferson Davis40 min
Apr 22, 9:42 AM CDTSevere Thunderstorm WarningJANJefferson Davis, Lawrence, Simpson20 min
Apr 22, 10:04 AM CDTSpecial Weather StatementJANLincoln41 min
Apr 22, 10:11 AM CDTSevere Thunderstorm WarningJANLincoln64 min
Apr 22, 10:25 AM CDTSevere Thunderstorm WarningJANLincoln43 min
Apr 22, 10:50 AM CDTSpecial Weather StatementJANSmith25 min
Apr 22, 11:04 AM CDTSpecial Weather StatementJANLawrence41 min
Apr 22, 11:23 AM CDTSpecial Weather StatementJANSmith52 min
Apr 22, 11:47 AM CDTSpecial Weather StatementJANSimpson43 min
Apr 22, 12:34 PM CDTSpecial Weather StatementJANSmith41 min
Apr 22, 12:59 PM CDTTornado WarningJANRankin, Simpson, Smith19 min
Apr 22, 3:54 PM CDTSpecial Weather StatementJANJones36 min
Apr 22, 4:30 PM CDTSpecial Weather StatementJANNoxubee15 min
Apr 22, 4:32 PM CDTSpecial Weather StatementJANClarke58 min
Apr 22, 4:52 PM CDTSevere Thunderstorm WarningJANClarke23 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.