Alert archive / Louisiana / Special Weather Statements in 2017

Special Weather Statement, NWS Jackson, MS

July 29, 2017Madison Parish, Louisiana

NWS Jackson, MS issued this special weather statement at Jul 29, 2017, 5:12 AM CDT for Madison Parish, Louisiana. It was in force for 48 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
Jul 29, 2017, 5:12 AM CDT (10:12 UTC)
Expired
Jul 29, 2017, 6:00 AM CDT
In force
48 min
Issued by
NWS Jackson, MS

County Madison Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 116 km from the middle of the area, began a volume at 10:13 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.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 10.2 hours before the alert went out and 107 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 00:00Z on 2017-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2496 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2017-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.1939Sfc1 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
2496 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1038 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this special weather statement went out at Jul 29, 4:43 AM CDT, 29 minutes earlier.

Area forecast discussion, Jul 29, 4:43 AM CDT, 29 minutes before
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Hazardous weather outlook, Jul 29, 3:59 AM CDT, 1 hour 13 minutes before
Hazardous Weather Outlook
National Weather Service Jackson MS
359 AM CDT Sat Jul 29 2017

ARZ074-075-LAZ007>009-MSZ018-019-025>046-051-300900-
Ashley-Chicot-Morehouse-West Carroll-East Carroll-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-
Newton-
359 AM CDT Sat Jul 29 2017

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

.DAY ONE...Today and Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Sunday 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 is not expected through next Friday.

LAZ015-023>026-MSZ052-060-061-300900-
Richland-Franklin LA-Catahoula-Tensas-Concordia-Lauderdale-Adams-
Franklin MS-
359 AM CDT Sat Jul 29 2017

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

.DAY ONE...Today and Tonight

FLOODING
THREAT...Limited
TIMING...Today

Heavy rain and localized flash flooding will be possible this morning.

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

.DAYS TWO THROUGH SEVEN...Sunday 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 is not expected through next Friday.

LAZ016-MSZ047>050-053>059-062>066-072>074-300900-
Madison LA-Warren-Hinds-Rankin-Scott-Claiborne-Copiah-Simpson-
Smith-Jasper-Clarke-Jefferson-Lincoln-Lawrence-Jefferson Davis-
Covington-Jones-Marion-Lamar-Forrest-
359 AM CDT Sat Jul 29 2017

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

.DAY ONE...Today and Tonight

FLOODING
THREAT...Elevated
TIMING...Today

Heavy rain and flash flooding will be possible, especially early
this morning. A flash flood watch remains in effect.

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

.DAYS TWO THROUGH SEVEN...Sunday 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 is not expected through next Friday.

21

&&

...HAZARD LEGEND...

*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...
   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

Tropical page...
   www.weather.gov/jan/tropical
National Hurricane Center Home Page...
   www.nhc.noaa.gov/
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 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, Jul 29, 3:37 AM CDT, 1 hour 35 minutes before
Special Weather Statement
National Weather Service Jackson MS
337 AM CDT SAT JUL 29 2017

MSZ047-053-290915-
Warren MS-Claiborne MS-
337 AM CDT SAT JUL 29 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL WARREN AND
CLAIBORNE COUNTIES UNTIL 415 AM CDT...

At 337 AM CDT, Meteorologists were tracking a strong thunderstorm 7
miles west of Rocky Springs, or 18 miles south of Vicksburg, moving
southeast at 20 mph.

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

This strong thunderstorm will be near...
  Port Gibson and Rocky Springs around 350 AM CDT.
  Hermanville around 405 AM CDT.
  Pattison around 410 AM CDT.
  Peyton around 415 AM CDT.

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.

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 3201 9108 3202 9108 3221 9095 3213 9072
      3184 9072 3183 9073 3179 9074 3178 9075
      3179 9085 3180 9084 3183 9084 3184 9092
      3199 9110
TIME...MOT...LOC 0837Z 316DEG 17KT 3206 9093

19
Special weather statement, Jul 29, 3:41 AM CDT, 1 hour 31 minutes before
Special Weather Statement
National Weather Service Jackson MS
341 AM CDT SAT JUL 29 2017

MSZ073-074-290930-
Lamar MS-Forrest MS-
341 AM CDT SAT JUL 29 2017

...A STRONG THUNDERSTORM WILL AFFECT FORREST AND NORTHERN LAMAR
COUNTIES UNTIL 430 AM CDT...

At 341 AM CDT, Meteorologists were tracking a strong thunderstorm
over Rawls Springs, or near West Hattiesburg, moving southeast at 20
mph.

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

This strong thunderstorm will be near...
  Hattiesburg around 345 AM CDT.
  West Hattiesburg around 350 AM CDT.
  Petal around 400 AM CDT.
  Sunrise around 410 AM CDT.
  Mclaurin around 430 AM CDT.

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.

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 3099 8932 3141 8965 3143 8965 3143 8915
      3105 8915
TIME...MOT...LOC 0841Z 316DEG 17KT 3137 8938

19
Special weather statement, Jul 29, 3:47 AM CDT, 1 hour 25 minutes before
Special Weather Statement
National Weather Service Jackson MS
347 AM CDT SAT JUL 29 2017

LAZ016-025-290945-
Tensas LA-Madison LA-
347 AM CDT SAT JUL 29 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN TENSAS AND
SOUTHWESTERN MADISON PARISHES UNTIL 445 AM CDT...

At 347 AM CDT, Meteorologists were tracking a strong thunderstorm 8
miles southeast of Bakers, or 16 miles southwest of Tallulah, moving
southeast at 20 mph.

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

This strong thunderstorm will be near...
  Somerset around 425 AM CDT.
  Newellton around 440 AM CDT.
  Lake Bruin around 445 AM CDT.

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.

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 3223 9151 3224 9154 3230 9152 3232 9147
      3235 9150 3236 9145 3240 9148 3243 9135
      3221 9113 3214 9117 3211 9103 3205 9108
      3207 9116 3201 9108 3198 9118 3192 9118
      3184 9126 3215 9150 3220 9149 3221 9155
TIME...MOT...LOC 0847Z 316DEG 16KT 3226 9140

19
Special weather statement, Jul 29, 4:14 AM CDT, 58 minutes before
Special Weather Statement
National Weather Service Jackson MS
414 AM CDT SAT JUL 29 2017

MSZ047-053-291000-
Warren MS-Claiborne MS-
414 AM CDT SAT JUL 29 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN WARREN AND
CLAIBORNE COUNTIES UNTIL 500 AM CDT...

At 414 AM CDT, Meteorologists were tracking a strong thunderstorm 7
miles east of Somerset, or 18 miles south of Tallulah, moving
southeast at 35 mph.

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

This strong thunderstorm will be near...
  Yokena around 425 AM CDT.
  Port Gibson around 440 AM CDT.
  Rocky Springs around 445 AM CDT.
  Hermanville and Pattison around 450 AM CDT.
  Peyton around 500 AM CDT.

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.

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 3221 9114 3224 9105 3222 9100 3219 9100
      3222 9098 3213 9072 3178 9074 3179 9084
      3183 9084 3184 9091 3199 9111 3203 9108
      3207 9116 3205 9108 3216 9100 3218 9106
      3213 9105 3212 9112 3213 9116 3216 9117
TIME...MOT...LOC 0914Z 305DEG 29KT 3214 9111

19
Special weather statement, Jul 29, 4:36 AM CDT, 36 minutes before
Special Weather Statement
National Weather Service Jackson MS
436 AM CDT SAT JUL 29 2017

MSZ055-291000-
Simpson MS-
436 AM CDT SAT JUL 29 2017

...A STRONG THUNDERSTORM WILL AFFECT SIMPSON COUNTY UNTIL 500 AM
CDT...

At 436 AM CDT, Meteorologists were tracking strong thunderstorms
along a line extending from near Magee to near Mendenhall to near
Harrisville. Movement was southeast at 30 mph.

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

Strong thunderstorms will be near...
  Sanatorium around 455 AM CDT.
  Magee around 500 AM CDT.

Other locations impacted by these storms include D'Lo and Braxton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3191 9017 3193 9017 3194 9019 3195 9019
      3205 9023 3200 8966 3178 8965 3176 8998
TIME...MOT...LOC 0936Z 307DEG 25KT 3190 8968 3195 8994 3200 9006

19
Special weather statement, Jul 29, 5:12 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service Jackson MS
512 AM CDT SAT JUL 29 2017

LAZ016-025-MSZ047-291100-
Tensas LA-Madison LA-Warren MS-
512 AM CDT SAT JUL 29 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN TENSAS...CENTRAL
MADISON PARISHES IN NORTHEASTERN LOUISIANA AND SOUTHWESTERN WARREN
COUNTIES UNTIL 600 AM CDT...

At 511 AM CDT, Meteorologists were tracking strong thunderstorms
along a line extending from 6 miles south of Tendal to near Afton.
Movement was southeast at 30 mph.

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

Strong thunderstorms will be near...
  Afton around 515 AM CDT.
  Somerset and Yokena around 540 AM CDT.
  Newellton around 555 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 3237 9110 3214 9091 3210 9101 3211 9103
      3210 9104 3207 9112 3208 9113 3208 9115
      3206 9116 3201 9130 3236 9146 3236 9145
      3238 9147 3243 9149 3243 9148
TIME...MOT...LOC 1011Z 324DEG 25KT 3234 9138 3230 9115

19

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 9:10 PM CDTSpecial Weather StatementJANMadison35 min
Jul 28, 9:34 PM CDTSpecial Weather StatementJANRankin26 min
Jul 28, 9:58 PM CDTSpecial Weather StatementJANNewton, Rankin, Scott47 min
Jul 28, 10:50 PM CDTSpecial Weather StatementJANLauderdale, Newton40 min
Jul 29, 1:18 AM CDTFlash Flood WarningJANChoctaw, Winston4 hr
Jul 29, 1:23 AM CDTSpecial Weather StatementJANRankin52 min
Jul 29, 1:26 AM CDTSpecial Weather StatementJANMadison34 min
Jul 29, 1:59 AM CDTSpecial Weather StatementJANLeake46 min
Jul 29, 2:07 AM CDTSpecial Weather StatementJANJasper, Newton, Smith53 min
Jul 29, 2:44 AM CDTSpecial Weather StatementJANClarke, Jasper, Lauderdale61 min
Jul 29, 3:06 AM CDTSpecial Weather StatementJANCovington, Jefferson Davis, Jones54 min
Jul 29, 3:37 AM CDTSpecial Weather StatementJANClaiborne38 min
Jul 29, 3:41 AM CDTSpecial Weather StatementJANForrest49 min
Jul 29, 4:14 AM CDTSpecial Weather StatementJANClaiborne46 min
Jul 29, 4:18 AM CDTSevere Thunderstorm WarningJANClaiborne, Warren57 min
Jul 29, 4:36 AM CDTSpecial Weather StatementJANSimpson24 min
Jul 29, 3:47 AM CDTSpecial Weather StatementJANTensas58 min

Nearby

Special Weather Statements in Louisiana, 2017Every special weather statement in 2017

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.