Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 245, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Jul 27, 2021, 2:08 PM CDT for Catahoula Parish, Louisiana. It was in force for 52 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 27, 2021, 2:08 PM CDT (19:08 UTC)
- Expired
- Jul 27, 2021, 3:00 PM CDT
- In force
- 52 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Catahoula Parish, LA
The radar
The Ft Polk radar (KPOE), 135 km from the middle of the area, began a volume at 19:07 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, 7.1 hours before the alert went out and 173 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
- 863 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 917 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -40 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
633
WUUS54 KJAN 271908
SVRJAN
LAC025-272000-
/O.NEW.KJAN.SV.W.0245.210727T1908Z-210727T2000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
208 PM CDT Tue Jul 27 2021
The National Weather Service in Jackson has issued a
* Severe Thunderstorm Warning for...
Northwestern Catahoula Parish in northeastern Louisiana...
* Until 300 PM CDT.
* At 208 PM CDT, a severe thunderstorm was located near Enterprise,
or 21 miles southeast of Columbia, moving southwest at 5 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Sherwood around 230 PM CDT.
Aimwell, Manifest and Wallace Ridge around 300 PM CDT.
Other locations impacted by this severe thunderstorm include
Harrisonburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3193 9201 3193 9191 3197 9190 3197 9189
3195 9185 3194 9185 3192 9182 3192 9180
3189 9180 3189 9178 3187 9178 3188 9176
3188 9173 3190 9170 3189 9168 3164 9185
3172 9201
TIME...MOT...LOC 1908Z 036DEG 6KT 3184 9187
HAIL...<.75IN
WIND...60MPH
$$
NF2 follow-up statements
805
WWUS54 KJAN 271920
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
220 PM CDT Tue Jul 27 2021
LAC025-272000-
/O.CON.KJAN.SV.W.0245.000000T0000Z-210727T2000Z/
Catahoula LA-
220 PM CDT Tue Jul 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CDT
FOR NORTHWESTERN CATAHOULA PARISH...
At 220 PM CDT, a severe thunderstorm was located near Enterprise, or
22 miles southeast of Columbia, and is nearly stationary.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Wallace Ridge, Enterprise, Rosefield, Aimwell, Manifest, Sherwood and
Harrisonburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3193 9201 3193 9191 3197 9190 3197 9189
3195 9185 3194 9185 3192 9182 3192 9180
3189 9180 3189 9178 3187 9178 3188 9176
3188 9173 3190 9170 3189 9168 3164 9185
3172 9201
TIME...MOT...LOC 1920Z 029DEG 2KT 3184 9187
HAIL...<.75IN
WIND...60MPH
$$
NF564
WWUS54 KJAN 271958
SVSJAN
Severe Weather Statement
National Weather Service Jackson MS
258 PM CDT Tue Jul 27 2021
LAC025-272008-
/O.EXP.KJAN.SV.W.0245.000000T0000Z-210727T2000Z/
Catahoula LA-
258 PM CDT Tue Jul 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CATAHOULA PARISH
WILL EXPIRE AT 300 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with thunderstorms in this
area.
LAT...LON 3193 9201 3193 9191 3197 9190 3197 9189
3195 9185 3194 9185 3192 9182 3192 9180
3189 9180 3189 9178 3187 9178 3188 9176
3188 9173 3190 9170 3189 9168 3164 9185
3172 9201
TIME...MOT...LOC 1958Z 036DEG 6KT 3179 9191
$$
NFThe office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 2:54 PM CDT | Excessive Heat Warning | JAN | Catahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more | 4 days |
| Jul 27, 2:54 PM CDT | Heat Advisory | JAN | Catahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more | 5 days |
| Jul 27, 3:02 PM CDT | Special Weather Statement | JAN | Catahoula | 28 min |
| Jul 27, 3:19 PM CDT | Flash Flood Warning | JAN | Catahoula | 3 hr |
| Jul 27, 5:34 PM CDT | Severe Thunderstorm Warning | JAN | Madison | 41 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.