Alert archive / Louisiana / Special Weather Statements in 2018
Special Weather Statement, NWS Jackson, MS
NWS Jackson, MS issued this special weather statement at Aug 7, 2018, 4:16 PM CDT for Richland Parish, Louisiana. It was in force for 44 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
- Aug 7, 2018, 4:16 PM CDT (21:16 UTC)
- Expired
- Aug 7, 2018, 5:00 PM CDT
- In force
- 44 min
- Issued by
- NWS Jackson, MS
County Richland Parish, LA
The radar
The Ft Polk radar (KPOE), 178 km from the middle of the area, began a volume at 21:16 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 12:00Z, 9.3 hours before the alert went out and 169 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.
- Mixed-layer CAPE
- 1202 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 956 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</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 Aug 7, 3:35 PM CDT, 41 minutes earlier.
Area forecast discussion, Aug 7, 3:35 PM CDT, 41 minutes before
Area Forecast Discussion National Weather Service Jackson MS 335 PM CDT Tue Aug 7 2018 .DISCUSSION... Tonight and tomorrow...Scattered showers and storms have developed this afternoon and will continue through the rest of the afternoon and evening. These will diminish with the loss of daytime heating. THe heat advisory hasn't really panned out today and have canceled this early. However heat indices in the east have reached around 100-103 degrees. A pattern change will occur starting tomorrow through the rest of the week as the upper ridge that had been in place over the region begins to break down. It will be replaced by an upper trough that will perch itself across the Ohio Valley region. This will allow a front to begin to sag south across the area beginning tomorrow. Rain chances will be on the increase tomorrow with this but likely not as high as will be the case later in the week. Highs will still get warm ahead of this front with readings in the lower to mid 90s expected. /28/ Thursday to Tuesday...The overall pattern will be on the wetter side with an opportunity for some heavy rainfall (mainly NW) Thu night into parts of Fri. Models are in good agreement on the mid/upper level ridge to amplify over the Rockies for late week with a resulting trough taking shape over the MS/Lower MS River Valley. The low level response to this will be a surface pressure trough that will linger across the Red River Valley and into the Mid-South. This will help focus low level convergence during the Thu-Sat periods and promote increased rain/storm chances. A signal that has been evident, but now becoming more persistent, is that a better short wave will interact with the surface boundary later on Thu into early Fri. The Euro/GFS/NAM all capture this feature and each show a low level response in the form of 850mb theta e convergence and increased moisture transport. This signal is one that often supports locally heavy rainfall during the summer months during the early morning period when the low level jet gets established. Corfidi vectors indicating training of storms as well. Additionally, the airmass will be quite moist with PWs 2.0 to 2.2 inches which will support efficient rainfall rates. Right now the focus for this looks to be over the NW part of the forecast area. The location for this could be adjusted with time and as more hi-res data captures the time period in question. Right now, pockets of 2-3 inches are possible with locally higher not out of the question. WPC is agreement on this potential with our NW/N in a Slight/Marginal risk for excessive rain. Based off this, will add a Limited threat for flooding in the HWO across our NW for Thu night into Fri. Concerning temps, lows will be around normal (70-73) while the humid airmass is in place. Highs will be below avg due to increased precip/clouds. Will have to watch temps on Fri as if precip/clouds linger, readings could hold more in the lower 80s for a good portion of the area. Right now, confidence and details in the precip evolution won't allow for that sort of aggressive temp forecast adjustment. For Sat int Tue...the trend should be fore less in the way of precip chances each day as we see mid level heights build and more subsidence do to ridging. As that occurs, look for temps to steadily warm and return to more season conditions for early next week. /CME/ && .AVIATION... 18Z TAF discussion: VFR conditions will prevail for most areas today. Some showers and storms are developing this afternoon and could affect a TAF site. Did not include this for now and will rely on future amendments. Any storms will diminish through the evening. /28/ && .PRELIMINARY POINT TEMPS/POPS... Jackson 73 92 73 90 / 16 27 27 62 Meridian 74 93 73 91 / 17 31 23 51 Vicksburg 74 93 74 90 / 12 24 45 61 Hattiesburg 73 93 73 92 / 16 30 6 43 Natchez 73 93 73 91 / 12 22 16 49 Greenville 74 92 73 86 / 18 39 66 74 Greenwood 73 92 73 87 / 18 41 65 74 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...None. LA...None. AR...None. && 28/CME
Hazardous weather outlook, Aug 7, 3:06 PM CDT, 1 hour 10 minutes before
Hazardous Weather Outlook National Weather Service Jackson MS 306 PM CDT Tue Aug 7 2018 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 082015- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-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-Claiborne-Copiah- Simpson-Smith-Jasper-Clarke-Jefferson-Adams-Franklin MS-Lincoln- Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest- 306 PM CDT Tue Aug 7 2018 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, north central Mississippi, and south central Mississippi. .DAY ONE...Tonight and Wednesday The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Wednesday night through Monday There is potential for flooding later this week as a front sags into the region and could result in heavy rain. (https://www.weather.gov/images/jan/graphicast/1.png) .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 Monday. 28 && ...HAZARD LEGEND... No short term hazards expected. ...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/jan/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
In the hours before
Special weather statement, Aug 7, 1:45 PM CDT, 2 hours 31 minutes before
Special Weather Statement
National Weather Service Jackson MS
145 PM CDT TUE AUG 7 2018
LAZ024-026-MSZ060-071915-
Catahoula LA-Concordia LA-Adams MS-
145 PM CDT TUE AUG 7 2018
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL CONCORDIA...SOUTHWESTERN
CATAHOULA PARISHES IN NORTHEASTERN LOUISIANA AND SOUTHWESTERN ADAMS
COUNTIES UNTIL 215 PM CDT...
At 144 PM CDT, Meteorologists were tracking a strong thunderstorm
near Acme, or 11 miles southeast of Larto, moving north at 30 mph.
Winds in excess of 40 mph will be possible with this storm.
This strong thunderstorm will be near...
New Era around 150 PM CDT.
Monterey and Deer Park around 210 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.
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.
&&
LAT...LON 3104 9165 3104 9172 3116 9170 3118 9168
3120 9170 3130 9191 3127 9195 3123 9192
3124 9201 3151 9201 3143 9143 3132 9145
3128 9150 3124 9148 3121 9152 3124 9154
3123 9157 3113 9163 3104 9156 3098 9166
TIME...MOT...LOC 1844Z 198DEG 25KT 3128 9174
DCSpecial weather statement, Aug 7, 2:58 PM CDT, 1 hour 18 minutes before
Special Weather Statement
National Weather Service Jackson MS
258 PM CDT TUE AUG 7 2018
LAZ024-072030-
Catahoula LA-
258 PM CDT TUE AUG 7 2018
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN CATAHOULA PARISH
UNTIL 330 PM CDT...
At 258 PM CDT, Meteorologists were tracking a strong thunderstorm
near Sherwood, or 22 miles southeast of Columbia, moving north at 25
mph.
Winds in excess of 40 mph will be possible with this storm.
This strong thunderstorm will be near...
Sherwood around 305 PM CDT.
Enterprise around 310 PM CDT.
Rosefield around 315 PM CDT.
Other locations impacted by this storm include Harrisonburg.
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.
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.
&&
LAT...LON 3193 9201 3193 9191 3197 9190 3195 9184
3194 9185 3192 9182 3192 9180 3189 9180
3189 9178 3188 9178 3171 9174 3167 9182
3165 9201
TIME...MOT...LOC 1958Z 163DEG 21KT 3181 9191
DCSpecial weather statement, Aug 7, 3:29 PM CDT, 47 minutes before
Special Weather Statement National Weather Service Jackson MS 329 PM CDT TUE AUG 7 2018 MSZ030-072100- Clay MS- 329 PM CDT TUE AUG 7 2018 ...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL CLAY COUNTY UNTIL 400 PM CDT... At 329 PM CDT, Meteorologists were tracking a strong thunderstorm near Trebloc, or 10 miles northeast of Montpelier, moving northeast at 5 mph. Winds in excess of 40 mph will be possible with this storm. This storm will remain over mainly rural areas of north central Clay County. 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. 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. && LAT...LON 3379 8872 3376 8883 3381 8886 3381 8872 TIME...MOT...LOC 2029Z 241DEG 6KT 3380 8880 DC
Special weather statement, Aug 7, 4:16 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Jackson MS
416 PM CDT TUE AUG 7 2018
LAZ007-015-072200-
Morehouse LA-Richland LA-
416 PM CDT TUE AUG 7 2018
...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL MOREHOUSE AND
CENTRAL RICHLAND PARISHES UNTIL 500 PM CDT...
At 416 PM CDT, Meteorologists were tracking a strong thunderstorm
over Rayville, moving north at 15 mph.
Winds in excess of 40 mph will be possible with this storm.
This strong thunderstorm will be near...
Rayville around 425 PM CDT.
Start around 430 PM CDT.
Other locations impacted by this storm include Oak Ridge.
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.
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.
&&
LAT...LON 3240 9199 3245 9194 3246 9195 3249 9193
3252 9190 3255 9192 3260 9193 3266 9168
3239 9165 3239 9167 3238 9168 3233 9201
3236 9201
TIME...MOT...LOC 2116Z 168DEG 15KT 3245 9175
DCThe office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 8:50 PM CDT | Special Weather Statement | JAN | Franklin | 40 min |
| Aug 7, 4:18 AM CDT | Heat Advisory | JAN | Clarke, Kemper, Lauderdale, Lowndes, Noxubee | 11 hr |
| Aug 7, 3:29 PM CDT | Special Weather Statement | JAN | Clay | 31 min |
| Aug 7, 5:59 PM CDT | Special Weather Statement | JAN | Marion | 31 min |
| Aug 7, 6:02 PM CDT | Special Weather Statement | JAN | Rankin | 43 min |
| Aug 7, 6:07 PM CDT | Severe Thunderstorm Warning | JAN | Marion | 28 min |
| Aug 7, 6:12 PM CDT | Special Weather Statement | JAN | Lincoln | 33 min |
| Aug 7, 1:45 PM CDT | Special Weather Statement | JAN | Concordia | 30 min |
| Aug 7, 2:58 PM CDT | Special Weather Statement | JAN | Catahoula | 32 min |
| Aug 7, 5:48 PM CDT | Special Weather Statement | JAN | Chicot | 27 min |
Nearby
Special Weather Statements in Louisiana, 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.