Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 38, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at Mar 27, 2021, 10:23 PM CDT for Union County, Arkansas; Claiborne Parish, Union Parish, Louisiana. It was in force for 67 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
- Mar 27, 2021, 10:23 PM CDT (03:23 UTC)
- Expired
- Mar 27, 2021, 11:30 PM CDT
- In force
- 67 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Union County, AR, Claiborne Parish, LA, Union Parish, LA
The radar
The Shreveport radar (KSHV), 161 km from the middle of the area, began a volume at 03:23 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 27, 3:25 PM CDT | Tornado Watch | SPC | 10 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 3.4 hours before the alert went out and 152 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
- 1297 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 953 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 8.1
The text
As transmitted.
632
WUUS54 KSHV 280323
SVRSHV
ARC139-LAC027-111-280430-
/O.NEW.KSHV.SV.W.0038.210328T0323Z-210328T0430Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Shreveport LA
1023 PM CDT Sat Mar 27 2021
The National Weather Service in Shreveport has issued a
* Severe Thunderstorm Warning for...
Southern Union County in south central Arkansas...
Northern Union Parish in north central Louisiana...
Northern Claiborne Parish in northwestern Louisiana...
* Until 1130 PM CDT.
* At 1023 PM CDT, severe thunderstorms were located along a line
extending from 8 miles southwest of Wesson to 10 miles southwest of
Junction City to near Homer, moving east northeast at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Homer, Huttig, Junction City, Bernice, Strong, Wesson, Urbana,
Lawson, Cooley, Lapile, Marion, Lisbon, Felsenthal, Spearsville,
Lillie, New London, Oakland, Cecil, Litroe and Catesville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 1100 PM CDT for south central
Arkansas...and north central and northwestern Louisiana.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3297 9208 3292 9207 3287 9208 3272 9322
3292 9302 3308 9295 3327 9229 3325 9223
3323 9223 3322 9222 3321 9223 3320 9221
3321 9218 3316 9217 3316 9211 3310 9214
3303 9211 3303 9209 3301 9207
TIME...MOT...LOC 0323Z 251DEG 38KT 3304 9289 3292 9286 3277 9308
HAIL...1.00IN
WIND...60MPH
$$
152 follow-up statements
014
WWUS54 KSHV 280404
SVSSHV
Severe Weather Statement
National Weather Service Shreveport LA
1104 PM CDT Sat Mar 27 2021
ARC139-LAC027-111-280430-
/O.CON.KSHV.SV.W.0038.000000T0000Z-210328T0430Z/
Union AR-Union LA-Claiborne LA-
1104 PM CDT Sat Mar 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT
FOR SOUTHEASTERN UNION COUNTY...NORTHERN UNION AND EASTERN CLAIBORNE
PARISHES...
At 1103 PM CDT, severe thunderstorms were located along a line
extending from near Moro Bay State Park to near Strong to near
Cooley, moving east at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Huttig, Bernice, Strong, Urbana, Lawson, Cooley, Lapile, Marion,
Felsenthal, Spearsville, Lillie, New London, Aurelle, Oakland,
Taylorville, Hillsboro, Lockhart, Cecil and Litroe.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 100 AM CDT for south central
Arkansas...and north central and northwestern Louisiana.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3297 9208 3292 9207 3287 9208 3283 9283
3305 9257 3321 9249 3327 9229 3325 9223
3323 9223 3322 9222 3321 9223 3320 9221
3321 9218 3316 9217 3316 9211 3310 9214
3303 9211 3303 9209 3301 9207
TIME...MOT...LOC 0403Z 250DEG 40KT 3322 9230 3306 9236 3290 9262
HAIL...1.00IN
WIND...60MPH
$$
15197
WWUS54 KSHV 280424
SVSSHV
Severe Weather Statement
National Weather Service Shreveport LA
1124 PM CDT Sat Mar 27 2021
ARC139-LAC027-111-280432-
/O.EXP.KSHV.SV.W.0038.000000T0000Z-210328T0430Z/
Union AR-Union LA-Claiborne LA-
1124 PM CDT Sat Mar 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN UNION COUNTY...
NORTHERN UNION AND EASTERN CLAIBORNE PARISHES WILL EXPIRE AT 1130 PM
CDT...
The storms which prompted the warning will be exiting the warned
area shortly. Therefore, the warning will be allowed to expire.
However gusty winds and heavy rain are still possible with these
thunderstorms.
A Tornado Watch remains in effect until 100 AM CDT for south central
Arkansas...and north central and northwestern Louisiana.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Shreveport.
LAT...LON 3297 9208 3292 9207 3287 9208 3283 9283
3305 9257 3321 9249 3327 9229 3325 9223
3323 9223 3322 9222 3321 9223 3320 9221
3321 9218 3316 9217 3316 9211 3310 9214
3303 9211 3303 9209 3301 9207
TIME...MOT...LOC 0422Z 251DEG 38KT 3327 9208 3311 9214 3295 9240
$$
15The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 7:20 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Lafayette, Miller | 40 min |
| Mar 27, 7:56 PM CDT | Severe Thunderstorm Warning | SHV | Columbia, Hempstead, Lafayette, Miller, Nevada | 49 min |
| Mar 27, 7:39 PM CDT | Tornado Warning | SHV | Caddo, De Soto | 51 min |
| Mar 27, 8:04 PM CDT | Tornado Warning | SHV | Bossier, Caddo | 41 min |
| Mar 27, 8:11 PM CDT | Tornado Warning | SHV | Caddo, De Soto | 49 min |
| Mar 27, 8:46 PM CDT | Tornado Warning | SHV | Bienville, Bossier, Caddo, Webster | 19 min |
| Mar 27, 10:39 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 51 min |
| Mar 27, 11:30 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Claiborne, Webster | 45 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2021Severe Thunderstorm Warnings in Arkansas, 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.