Alert archive / Louisiana / Severe Thunderstorm Watches in 2016
Severe Thunderstorm Watch 46
The Storm Prediction Center issued this severe thunderstorm watch at Mar 17, 2016, 1:19 PM CDT for 4 states. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 17, 2016, 1:19 PM CDT (18:19 UTC)
- Expired
- Mar 17, 2016, 10:00 PM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 83 counties
Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Mobile County, AL, Washington County, AL, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, De Soto Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Livingston Parish, LA, Madison Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Saint Helena Parish, LA, Saint Landry Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Hinds County, MS, Jackson County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Warren County, MS, Wayne County, MS, Wilkinson County, MS, Angelina County, TX, Cherokee County, TX, Jasper County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Tyler County, TX
The radar
The Ft Polk radar (KPOE), 124 km from the middle of the area, began a volume at 18:20 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
73 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 1:43 PM CDT | Severe Thunderstorm Warning | MOB | Mobile | 47 min |
| Mar 17, 1:44 PM CDT | Severe Thunderstorm Warning | LIX | Saint Helena, Tangipahoa | 31 min |
| Mar 17, 1:45 PM CDT | Severe Thunderstorm Warning | JAN | Claiborne, Copiah, Jefferson, Lincoln | 60 min |
| Mar 17, 1:48 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee | 12 min |
| Mar 17, 1:51 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 24 min |
| Mar 17, 1:52 PM CDT | Severe Thunderstorm Warning | JAN | Catahoula, Concordia, Tensas | 53 min |
| Mar 17, 1:59 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Red River, Winn | 46 min |
| Mar 17, 2:09 PM CDT | Severe Thunderstorm Warning | MOB | Mobile | 51 min |
| Mar 17, 2:13 PM CDT | Severe Thunderstorm Warning | LIX | Saint Helena, Tangipahoa | 21 min |
| Mar 17, 2:15 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 9 min |
| Mar 17, 2:24 PM CDT | Severe Thunderstorm Warning | JAN | Copiah, Lincoln | 66 min |
| Mar 17, 2:26 PM CDT | Tornado Warning | SHV | Natchitoches, Winn | 34 min |
| Mar 17, 2:30 PM CDT | Severe Thunderstorm Warning | SHV | Caldwell, LaSalle | 30 min |
| Mar 17, 2:37 PM CDT | Severe Thunderstorm Warning | JAN | Catahoula, Franklin | 53 min |
| Mar 17, 2:46 PM CDT | Severe Thunderstorm Warning | SHV | Grant, Natchitoches, Winn | 30 min |
| Mar 17, 2:55 PM CDT | Severe Thunderstorm Warning | LIX | Pike, Walthall | 35 min |
| Mar 17, 2:57 PM CDT | Severe Thunderstorm Warning | JAN | Copiah, Lawrence, Lincoln | 63 min |
| Mar 17, 2:58 PM CDT | Severe Thunderstorm Warning | JAN | Madison | 47 min |
| Mar 17, 3:02 PM CDT | Severe Thunderstorm Warning | JAN | Jefferson Davis, Lawrence, Marion | 58 min |
| Mar 17, 3:07 PM CDT | Severe Thunderstorm Warning | JAN | Adams, Claiborne, Jefferson | 53 min |
| Mar 17, 3:24 PM CDT | Severe Thunderstorm Warning | JAN | Concordia, Tensas | 51 min |
| Mar 17, 3:26 PM CDT | Severe Thunderstorm Warning | JAN | Hinds, Madison, Warren | 48 min |
| Mar 17, 3:32 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Sabine | 43 min |
| Mar 17, 3:34 PM CDT | Severe Thunderstorm Warning | MOB | Greene, Wayne | 41 min |
| Mar 17, 3:39 PM CDT | Severe Thunderstorm Warning | LCH | Rapides, Vernon | 66 min |
| Mar 17, 3:42 PM CDT | Severe Thunderstorm Warning | JAN | Concordia | 48 min |
| Mar 17, 3:47 PM CDT | Severe Thunderstorm Warning | JAN | Copiah, Franklin, Jefferson, Lincoln | 58 min |
| Mar 17, 3:53 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin | 37 min |
| Mar 17, 3:53 PM CDT | Severe Thunderstorm Warning | JAN | Covington, Jefferson Davis | 38 min |
| Mar 17, 4:08 PM CDT | Severe Thunderstorm Warning | MOB | Washington | 39 min |
| Mar 17, 4:09 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin | 36 min |
| Mar 17, 4:09 PM CDT | Severe Thunderstorm Warning | JAN | Franklin, Lincoln | 66 min |
| Mar 17, 4:12 PM CDT | Severe Thunderstorm Warning | JAN | Concordia | 29 min |
| Mar 17, 4:12 PM CDT | Severe Thunderstorm Warning | JAN | Lawrence | 63 min |
| Mar 17, 4:21 PM CDT | Severe Thunderstorm Warning | MOB | Wayne | 24 min |
| Mar 17, 4:25 PM CDT | Severe Thunderstorm Warning | LIX | Harrison | 35 min |
| Mar 17, 4:26 PM CDT | Flash Flood Warning | JAN | Copiah, Lawrence, Lincoln | 2 hr |
| Mar 17, 4:28 PM CDT | Severe Thunderstorm Warning | LCH | Beauregard, Vernon | 47 min |
| Mar 17, 4:38 PM CDT | Tornado Warning | LIX | Harrison | 37 min |
| Mar 17, 5:00 PM CDT | Severe Thunderstorm Warning | JAN | Jefferson Davis, Lawrence, Marion | 30 min |
| Mar 17, 5:03 PM CDT | Severe Thunderstorm Warning | LIX | East Feliciana, West Feliciana | 42 min |
| Mar 17, 5:03 PM CDT | Tornado Warning | LIX | Harrison, Jackson | 27 min |
| Mar 17, 5:09 PM CDT | Severe Thunderstorm Warning | LIX | Amite, Pike, Walthall | 51 min |
| Mar 17, 5:12 PM CDT | Severe Thunderstorm Warning | JAN | Jones | 48 min |
| Mar 17, 5:21 PM CDT | Tornado Warning | LIX | Pearl River | 24 min |
| Mar 17, 5:26 PM CDT | Severe Thunderstorm Warning | JAN | Lamar, Marion | 49 min |
| Mar 17, 5:28 PM CDT | Severe Thunderstorm Warning | LIX | East Feliciana, Saint Helena | 47 min |
| Mar 17, 5:29 PM CDT | Severe Thunderstorm Warning | LIX | Harrison, Jackson | 31 min |
| Mar 17, 5:36 PM CDT | Severe Thunderstorm Warning | JAN | Marion | 39 min |
| Mar 17, 5:39 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 66 min |
| Mar 17, 5:44 PM CDT | Severe Thunderstorm Warning | MOB | Greene, Perry, Wayne | 61 min |
| Mar 17, 5:56 PM CDT | Severe Thunderstorm Warning | JAN | Forrest, Lamar | 64 min |
| Mar 17, 5:59 PM CDT | Severe Thunderstorm Warning | MOB | Perry, Stone | 47 min |
| Mar 17, 6:07 PM CDT | Severe Thunderstorm Warning | MOB | George | 68 min |
| Mar 17, 6:14 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 31 min |
| Mar 17, 6:20 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, East Baton Rouge, East Feliciana, Iberville, Livingston, Saint Helena and 2 more | 40 min |
| Mar 17, 6:22 PM CDT | Severe Thunderstorm Warning | LIX | Pearl River | 23 min |
| Mar 17, 6:25 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 65 min |
| Mar 17, 6:43 PM CDT | Severe Thunderstorm Warning | LIX | Hancock, Harrison, Pearl River | 32 min |
| Mar 17, 6:44 PM CDT | Severe Thunderstorm Warning | MOB | George | 31 min |
| Mar 17, 7:05 PM CDT | Severe Thunderstorm Warning | MOB | Stone | 25 min |
| Mar 17, 7:23 PM CDT | Severe Thunderstorm Warning | MOB | Mobile | 37 min |
| Mar 17, 7:23 PM CDT | Severe Thunderstorm Warning | MOB | George, Stone | 37 min |
| Mar 17, 7:37 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Mobile | 23 min |
| Mar 17, 7:38 PM CDT | Tornado Warning | LIX | Jackson | 37 min |
| Mar 17, 7:55 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Escambia | 65 min |
| Mar 17, 8:00 PM CDT | Severe Thunderstorm Warning | MOB | Mobile | 45 min |
| Mar 17, 8:00 PM CDT | Flash Flood Warning | JAN | Forrest | 3 hr |
| Mar 17, 8:02 PM CDT | Severe Thunderstorm Warning | MOB | Mobile | 58 min |
| Mar 17, 8:16 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin | 29 min |
| Mar 17, 8:41 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin | 38 min |
| Mar 17, 8:45 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin, Mobile | 45 min |
| Mar 17, 9:30 PM CDT | Severe Thunderstorm Warning | MOB | Baldwin | 37 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
Jackson, MS (KJAN), launched 12:00Z, 6.3 hours before the alert went out and 180 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
- 1748 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 7:44 AM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Coffee, Conecuh, Covington and 7 more | 2 hr |
| Mar 17, 11:14 AM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 2 hr |
| Mar 17, 5:01 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Coffee, Conecuh, Covington, Crenshaw and 7 more | 89 min |
| Mar 17, 6:22 PM CDT | Mesoscale Discussion | SPC | Baldwin, Choctaw, Clarke, Mobile, Washington | 53 min |
| Mar 17, 9:37 AM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Caldwell, Catahoula, Claiborne and 16 more | 83 min |
| Mar 17, 12:58 PM CDT | Mesoscale Discussion | SPC | Allen, Avoyelles, Caldwell, Catahoula, Concordia, East Feliciana and 12 more | 92 min |
| Mar 17, 3:48 PM CDT | Mesoscale Discussion | SPC | Avoyelles, Catahoula, Concordia, East Feliciana, Franklin, Grant and 12 more | 87 min |
| Mar 17, 2:13 AM CDT | Mesoscale Discussion | SPC | Collin, Cooke, Dallas, Denton, Grayson, Jack and 6 more | 3 hr |
| Mar 17, 5:57 AM CDT | Mesoscale Discussion | SPC | Collin, Cooke, Dallas, Delta, Denton, Ellis and 13 more | 3 hr |
| Mar 17, 6:22 PM CDT | Mesoscale Discussion | SPC | Atascosa, Austin, Bandera, Bastrop, Bexar, Brazos and 43 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Louisiana, 2016Severe Thunderstorm Watches in Mississippi, 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; radar from the NEXRAD Level II archive.