Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 284, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Oct 27, 2021, 2:30 PM CDT for Catahoula Parish, Concordia Parish, Louisiana; Adams County, Mississippi. It was in force for 75 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Oct 27, 2021, 2:30 PM CDT (19:30 UTC)
- Expired
- Oct 27, 2021, 3:45 PM CDT
- In force
- 75 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Catahoula Parish, LA, Concordia Parish, LA, Adams County, MS
The radar
The Ft Polk radar (KPOE), 127 km from the middle of the area, began a volume at 19:31 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 27, 2:56 PM CDT | TORNADO | 22 Se Acme, LA | A BRIEF EF-0 TORNADO MOVED ALONG LA HIGHWAY 15, WHERE SEVERAL LARGE LIMBS WERE SNAPPED AND TREES WERE UPROOTED. A TORNADO DEBRIS SIGNATURE (TDS) WAS NOTED FROM THE FORT POLK (KPOE) RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Oct 27, 1:53 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 7.5 hours before the alert went out and 183 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2345 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
714
WUUS54 KJAN 271930
SVRJAN
LAC025-029-MSC001-272045-
/O.NEW.KJAN.SV.W.0284.211027T1930Z-211027T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
230 PM CDT Wed Oct 27 2021
The National Weather Service in Jackson has issued a
* Severe Thunderstorm Warning for...
Concordia Parish in northeastern Louisiana...
Catahoula Parish in northeastern Louisiana...
Adams County in southwestern Mississippi...
* Until 345 PM CDT.
* At 230 PM CDT, severe thunderstorms were located along a line
extending from near Olla to near Simmesport, moving northeast at 40
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Natchez, Vidalia, Ferriday, Larto, Monterey, Jonesville, Clayton,
Lee Bayou, Acme, New Era, Rosefield, Kingston, Wildsville, Spokane,
Mayna, Deer Park, Walters, Black Hawk, Aimwell and Sibley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Louisiana...and southwestern Mississippi.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3104 9165 3104 9172 3120 9168 3130 9191
3122 9198 3128 9202 3193 9201 3197 9190
3187 9178 3197 9160 3175 9154 3175 9132
3135 9118 3132 9147 3123 9149 3121 9159
3111 9163 3104 9156 3097 9166
TIME...MOT...LOC 1930Z 234DEG 35KT 3185 9220 3094 9187
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DL3 follow-up statements
126
WWUS54 KJAN 271939
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
239 PM CDT Wed Oct 27 2021
LAC025-029-MSC001-272045-
/O.CON.KJAN.SV.W.0284.000000T0000Z-211027T2045Z/
Concordia LA-Catahoula LA-Adams MS-
239 PM CDT Wed Oct 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR CONCORDIA...CATAHOULA PARISHES IN NORTHEASTERN LOUISIANA AND
ADAMS COUNTIES...
At 238 PM CDT, severe thunderstorms were located along a line
extending from near Olla to Simmesport, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Natchez, Vidalia, Ferriday, Larto, Monterey, Jonesville, Clayton, Lee
Bayou, Acme, New Era, Rosefield, Kingston, Wildsville, Spokane,
Mayna, Deer Park, Walters, Black Hawk, Aimwell and Sibley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Louisiana...and southwestern Mississippi.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3104 9165 3104 9172 3120 9168 3130 9191
3122 9198 3128 9202 3193 9201 3197 9190
3187 9178 3197 9160 3175 9154 3175 9132
3135 9118 3132 9147 3123 9149 3121 9159
3111 9163 3104 9156 3097 9166
TIME...MOT...LOC 1938Z 234DEG 35KT 3188 9215 3097 9183
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DL365
WWUS54 KJAN 272002
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
302 PM CDT Wed Oct 27 2021
LAC025-029-MSC001-272045-
/O.CON.KJAN.SV.W.0284.000000T0000Z-211027T2045Z/
Concordia LA-Catahoula LA-Adams MS-
302 PM CDT Wed Oct 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR CONCORDIA...EASTERN CATAHOULA PARISHES IN NORTHEASTERN LOUISIANA
AND ADAMS COUNTIES...
At 302 PM CDT, severe thunderstorms were located along a line
extending from 8 miles northwest of Enterprise to near Black Hawk,
moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Natchez, Vidalia, Ferriday, Monterey, Jonesville, Clayton, Lee Bayou,
New Era, Kingston, Black Hawk, Wildsville, Sibley, Slocum, Spokane,
Wallace Ridge, West Ferriday, Deer Park, Enterprise, Frogmore and
Ridgecrest.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Louisiana...and southwestern Mississippi.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3109 9168 3120 9168 3137 9185 3163 9184
3193 9197 3197 9190 3187 9178 3197 9160
3175 9154 3175 9132 3135 9118 3132 9147
3123 9149 3121 9159 3111 9163 3104 9156
3097 9166 3104 9165 3104 9167
TIME...MOT...LOC 2002Z 234DEG 35KT 3201 9195 3109 9163
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DL530
WWUS54 KJAN 272016
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
316 PM CDT Wed Oct 27 2021
LAC025-029-MSC001-272045-
/O.CON.KJAN.SV.W.0284.000000T0000Z-211027T2045Z/
Concordia LA-Catahoula LA-Adams MS-
316 PM CDT Wed Oct 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR NORTHEASTERN CONCORDIA...NORTHEASTERN CATAHOULA PARISHES IN
NORTHEASTERN LOUISIANA AND ADAMS COUNTIES...
At 316 PM CDT, severe thunderstorms were located along a line
extending from near Liddieville to near Fort Adams, moving northeast
at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Natchez, Vidalia, Ferriday, Clayton, Lee Bayou, Kingston, Sibley,
Spokane, West Ferriday, Deer Park, Frogmore, Ridgecrest and Sicily
Island.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Louisiana...and southwestern Mississippi.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3143 9169 3167 9176 3187 9178 3197 9160
3175 9154 3175 9132 3135 9118 3132 9147
3123 9149 3121 9159
TIME...MOT...LOC 2016Z 234DEG 35KT 3208 9183 3116 9151
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DLThe office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 27, 2:11 PM CDT | Special Weather Statement | JAN | Concordia | 34 min |
| Oct 27, 2:52 PM CDT | Tornado Warning | JAN | Concordia | 16 min |
| Oct 27, 3:01 PM CDT | Special Weather Statement | JAN | Franklin, Morehouse, Richland | 44 min |
| Oct 27, 3:38 PM CDT | Severe Thunderstorm Warning | JAN | Adams, Franklin, Jefferson | 67 min |
| Oct 27, 4:16 PM CDT | Severe Thunderstorm Warning | JAN | Claiborne | 44 min |
| Oct 27, 4:45 PM CDT | Severe Thunderstorm Warning | JAN | Lincoln | 45 min |
| Oct 27, 5:16 PM CDT | Special Weather Statement | JAN | Copiah, Hinds, Jefferson Davis, Lawrence, Rankin, Simpson | 74 min |
| Oct 27, 6:08 PM CDT | Special Weather Statement | JAN | Forrest, Lamar, Marion | 67 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2021Severe Thunderstorm Warnings in Mississippi, 2021Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.