Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS Jackson, MS

July 19, 2021Tensas Parish, Louisiana

NWS Jackson, MS issued this special weather statement at Jul 19, 2021, 12:15 PM CDT for Tensas Parish, Louisiana. It was in force for 45 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 19, 2021, 12:15 PM CDT (17:15 UTC)
Expired: Jul 19, 2021, 1:00 PM CDT
In force: 45 min
Issued by: NWS Jackson, MS

County Tensas Parish, LA

The radar

The Jackson/Brandon,MS radar (KDGX), 129 km from the middle of the area, began a volume at 17:14 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, 5.3 hours before the alert went out and 122 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1706 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 608 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 24 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 19, 10:08 AM CDT, 2 hours 7 minutes earlier.

Area forecast discussion, Jul 19, 10:08 AM CDT, 2 hours 7 minutes before

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Hazardous weather outlook, Jul 19, 3:10 AM CDT, 9 hours 5 minutes before

Hazardous Weather Outlook
National Weather Service Jackson MS
310 AM CDT Mon Jul 19 2021

ARZ074-075-LAZ007>009-015-016-023-025-MSZ019-034>053-055>058-
200815-
Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland-
Madison LA-Franklin LA-Tensas-Sunflower-Washington-Humphreys-
Holmes-Attala-Winston-Noxubee-Issaquena-Sharkey-Yazoo-Madison MS-
Leake-Neshoba-Kemper-Warren-Hinds-Rankin-Scott-Newton-Lauderdale-
Claiborne-Simpson-Smith-Jasper-Clarke-
310 AM CDT Mon Jul 19 2021

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

.DAY ONE...Today and Tonight

FLOODING
THREAT...Limited
TIMING...Through midday

Slow moving showers and thunderstorms early today may produce
localized rainfall amounts of 3-5 inches. As a result, localized
flash flooding especially in urban and low lying areas.

(https://www.weather.gov/images/jan/graphicast/1.png)

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

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 Sunday.

LAZ024-026-MSZ018-025>033-054-059>066-072>074-200815-
Catahoula-Concordia-Bolivar-Leflore-Grenada-Carroll-Montgomery-
Webster-Clay-Lowndes-Choctaw-Oktibbeha-Copiah-Jefferson-Adams-
Franklin MS-Lincoln-Lawrence-Jefferson Davis-Covington-Jones-
Marion-Lamar-Forrest-
310 AM CDT Mon Jul 19 2021

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

.DAY ONE...Today and Tonight

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

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 Sunday.

DL

&&

...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...
   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 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

Special weather statement, Jul 19, 7:15 AM CDT, 5 hours before

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Local storm report, Jul 19, 9:25 AM CDT, 2 hours 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
925 AM CDT MON JUL 19 2021

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

0822 AM     FLASH FLOOD      UNION                   32.57N 89.12W
07/19/2021                   NEWTON             MS   NWS EMPLOYEE

            W WALNUT STREET IMPASSABLE FROM HWY 492 TO
            GUM STREET.

&&

AJ

Local storm report, Jul 19, 10:11 AM CDT, 2 hours 4 minutes before

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Local storm report, Jul 19, 10:12 AM CDT, 2 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
1012 AM CDT MON JUL 19 2021

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

0700 AM     HEAVY RAIN       2 W UNION               32.57N 89.14W
07/19/2021  M5.11 INCH       NEWTON             MS   COCORAHS

            5.11 INCHES MEASURED AS OF 7AM. ALSO,
            SEVERAL FLOODED ROADS IN AND AROUND UNION.

&&

CE

Local storm report, Jul 19, 10:37 AM CDT, 1 hour 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
1037 AM CDT MON JUL 19 2021

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

0600 AM     FLASH FLOOD      1 SSW NESHOBA           32.61N 89.15W
07/19/2021                   NESHOBA            MS   EMERGENCY MNGR

            PART OF CR 317 IMPASSIBLE.

&&

CE

Special weather statement, Jul 19, 12:15 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Jackson MS
1215 PM CDT Mon Jul 19 2021

LAZ025-191800-
Tensas LA-
1215 PM CDT Mon Jul 19 2021

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL TENSAS PARISH UNTIL 100
PM CDT...

At 1215 PM CDT, Meteorologists were tracking a strong thunderstorm
over Helena, or 18 miles northeast of Ferriday, moving northeast at
20 mph.

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

This strong thunderstorm will be near...
  St. Joseph around 1250 PM CDT.
  Lake Bruin around 1255 PM CDT.
  Newellton around 100 PM 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.

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 3212 9120 3199 9112 3198 9117 3194 9119
      3192 9118 3187 9124 3186 9127 3185 9127
      3183 9124 3182 9125 3181 9128 3186 9130
      3185 9133 3184 9135 3179 9136 3175 9148
      3193 9151
TIME...MOT...LOC 1715Z 240DEG 16KT 3187 9141

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:56 PM CDT	Special Weather Statement	JAN	Simpson	49 min
Jul 19, 3:18 AM CDT	Special Weather Statement	JAN	Sharkey	57 min
Jul 19, 4:01 AM CDT	Special Weather Statement	JAN	Yazoo	59 min
Jul 19, 4:15 AM CDT	Flash Flood Warning	JAN	Washington	3 hr
Jul 19, 4:44 AM CDT	Special Weather Statement	JAN	Lauderdale	61 min
Jul 19, 5:07 AM CDT	Flash Flood Warning	JAN	Kemper, Lauderdale, Neshoba, Newton	3 hr
Jul 19, 7:15 AM CDT	Special Weather Statement	JAN	Lauderdale	45 min
Jul 19, 9:00 AM CDT	Flash Flood Warning	JAN	Scott	2 hr
Jul 19, 9:30 AM CDT	River Flood Warning	JAN	Leake	4 days
Jul 19, 9:53 AM CDT	River Flood Warning	JAN	Clarke	4 days
Jul 19, 2:49 PM CDT	Special Weather Statement	JAN	Lincoln	26 min

Nearby

Special Weather Statements in Louisiana, 2021 Every special weather statement in 2021

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.