Alert archive / Louisiana / Tornado Watches in 2023
Tornado Watch 70
The Storm Prediction Center issued this tornado watch at Mar 16, 2023, 10:35 PM CDT for 18 parishes in Louisiana; 4 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 16, 2023, 10:35 PM CDT (03:35 UTC)
- Expired
- Mar 17, 2023, 3:51 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 22 counties
Allen Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Vernon Parish, LA, Winn Parish, LA, Jasper County, TX, Newton County, TX, Sabine County, TX, Tyler County, TX
The radar
The Ft Polk radar (KPOE), 73 km from the middle of the area, began a volume at 03:34 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 16, 10:41 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Jackson, Natchitoches, Red River, Winn | 35 min |
| Mar 16, 11:07 PM CDT | Severe Thunderstorm Warning | SHV | De Soto, Sabine | 38 min |
| Mar 16, 11:09 PM CDT | Severe Thunderstorm Warning | SHV | Jackson, Natchitoches, Ouachita, Winn | 51 min |
| Mar 17, 12:08 AM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Jackson, Natchitoches, Ouachita, Red River, Sabine and 1 more | 52 min |
| Mar 17, 12:40 AM CDT | Severe Thunderstorm Warning | SHV | Grant, LaSalle, Natchitoches, Sabine, Winn | 65 min |
| Mar 17, 12:56 AM CDT | Severe Thunderstorm Warning | LCH | Vernon | 34 min |
| Mar 17, 1:08 AM CDT | Tornado Warning | LCH | Vernon | 23 min |
| Mar 17, 1:38 AM CDT | Severe Thunderstorm Warning | SHV | Grant, LaSalle | 46 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 3.6 hours before the alert went out and 103 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
- 41 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 602 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 441 m²/s²
- 0-3 km storm-relative helicity
- 591 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 16, 7:38 PM CDT | Mesoscale Discussion | SPC | Grant, Natchitoches, Sabine, Winn | 97 min |
| Mar 16, 10:06 PM CDT | Mesoscale Discussion | SPC | Caddo, De Soto, Natchitoches, Red River, Sabine, Vernon | 84 min |
| Mar 16, 11:42 PM CDT | Mesoscale Discussion | SPC | Bienville, Caldwell, Catahoula, De Soto, Franklin, Grant and 13 more | 93 min |
| Mar 17, 1:52 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Catahoula and 8 more | 53 min |
| Mar 16, 8:19 PM CDT | Mesoscale Discussion | SPC | Anderson, Bowie, Camp, Cass, Cherokee, Falls and 18 more | 86 min |
| Mar 16, 10:44 PM CDT | Mesoscale Discussion | SPC | Austin, Bastrop, Brazos, Burleson, Caldwell, Colorado and 8 more | 91 min |
| Mar 17, 1:23 AM CDT | Mesoscale Discussion | SPC | Atascosa, Bee, Dimmit, Frio, La Salle, Live Oak and 2 more | 3 hr |
Nearby
Tornado Watches in Louisiana, 2023Tornado Watches in Texas, 2023Every tornado watch in 2023
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.