Alert archive / Louisiana / Severe Thunderstorm Watches in 2016
Severe Thunderstorm Watch 114
The Storm Prediction Center issued this severe thunderstorm watch at Apr 27, 2016, 4:56 AM CDT for 15 parishes in Louisiana; 10 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2016, 4:56 AM CDT (09:56 UTC)
- Expired
- Apr 27, 2016, 9:55 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 55 kt
All 25 counties
Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, De Soto Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Jefferson Davis Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vernon Parish, LA, Winn Parish, LA, Angelina County, TX, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Newton County, TX, Orange County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Tyler County, TX
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 5:17 AM CDT | Severe Thunderstorm Warning | LCH | Hardin, Jasper, Jefferson, Tyler | 58 min |
| Apr 27, 5:31 AM CDT | Severe Thunderstorm Warning | SHV | De Soto, Sabine | 59 min |
| Apr 27, 6:14 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, Natchitoches | 61 min |
| Apr 27, 6:15 AM CDT | Severe Thunderstorm Warning | LCH | Hardin, Jasper, Jefferson, Newton, Orange, Tyler | 60 min |
| Apr 27, 6:33 AM CDT | Tornado Warning | SHV | Bienville, Jackson, Lincoln, Natchitoches, Winn | 42 min |
| Apr 27, 6:39 AM CDT | Severe Thunderstorm Warning | SHV | Sabine | 66 min |
| Apr 27, 6:43 AM CDT | Severe Thunderstorm Warning | SHV | De Soto, Natchitoches, Red River | 62 min |
| Apr 27, 6:47 AM CDT | Severe Thunderstorm Warning | LCH | Allen, Beauregard, Calcasieu, Cameron, Jefferson Davis, Vernon | 58 min |
| Apr 27, 7:40 AM CDT | Tornado Warning | LCH | Vernon | 35 min |
| Apr 27, 7:46 AM CDT | Severe Thunderstorm Warning | LCH | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 4 more | 59 min |
| Apr 27, 8:14 AM CDT | Tornado Warning | LCH | Vernon | 16 min |
| Apr 27, 8:20 AM CDT | Severe Thunderstorm Warning | SHV | Grant, Natchitoches, Winn | 55 min |
| Apr 27, 8:38 AM CDT | Severe Thunderstorm Warning | LCH | Acadia, Cameron, Jefferson Davis, Lafayette, Vermilion | 52 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
Lake Charles Mun, LA (KLCH), launched 00:00Z, 9.9 hours before the alert went out and 131 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
- 1519 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 858 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -62 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- -0.2
- Supercell composite
- -2.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 9:36 PM CDT | Mesoscale Discussion | SPC | Bossier, Caddo | 114 min |
| Apr 26, 10:21 PM CDT | Severe Thunderstorm Watch | SPC | Bossier, Caddo, De Soto, Red River, Sabine, Webster | 9 hr |
| Apr 27, 1:35 AM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Lincoln and 3 more | 115 min |
| Apr 27, 4:28 AM CDT | Mesoscale Discussion | SPC | Beauregard, Natchitoches, Red River, Sabine, Vernon | 92 min |
| Apr 27, 7:30 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 19 more | 2 hr |
| Apr 27, 7:54 AM CDT | Severe Thunderstorm Watch | SPC | Acadia, Ascension, Assumption, Avoyelles, Catahoula, Concordia and 29 more | 7 hr |
| Apr 26, 8:52 PM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Callahan, Clay, Coleman, Collin and 34 more | 53 min |
Nearby
Severe Thunderstorm Watches in Louisiana, 2016Severe Thunderstorm Watches in Texas, 2016Every severe thunderstorm watch in 2016
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.