Alert archive / Louisiana / Tornado Watches in 2016
Tornado Watch 19
The Storm Prediction Center issued this tornado watch at Feb 23, 2016, 11:08 AM CST for 29 parishes in Louisiana; 8 counties in Mississippi. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 23, 2016, 11:08 AM CST (17:08 UTC)
- Expired
- Feb 23, 2016, 6:00 PM CST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 37 counties
Acadia Parish, LA, Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
36 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 23, 11:11 AM CST | Tornado Warning | LIX | Saint Charles, Saint John the Baptist | 19 min |
| Feb 23, 11:13 AM CST | Tornado Warning | LIX | Jefferson | 17 min |
| Feb 23, 11:45 AM CST | Tornado Warning | LIX | Ascension, East Baton Rouge, Iberville | 30 min |
| Feb 23, 11:58 AM CST | Tornado Warning | LIX | Saint Tammany | 32 min |
| Feb 23, 12:11 PM CST | Tornado Warning | LIX | Ascension, East Baton Rouge, Livingston | 34 min |
| Feb 23, 12:26 PM CST | Tornado Warning | LIX | Saint Tammany | 34 min |
| Feb 23, 12:40 PM CST | Tornado Warning | LIX | Livingston, Saint Helena, Tangipahoa | 35 min |
| Feb 23, 12:54 PM CST | Severe Thunderstorm Warning | LCH | Acadia, Lafayette, Saint Landry, Saint Martin, Vermilion | 30 min |
| Feb 23, 12:59 PM CST | Tornado Warning | LIX | Saint Tammany | 31 min |
| Feb 23, 1:03 PM CST | Tornado Warning | LIX | Ascension, Livingston, Saint James, Saint John the Baptist | 27 min |
| Feb 23, 1:11 PM CST | Tornado Warning | LIX | Saint Helena, Tangipahoa | 34 min |
| Feb 23, 1:14 PM CST | Severe Thunderstorm Warning | LIX | Ascension, Assumption, Iberville, Saint James | 46 min |
| Feb 23, 1:30 PM CST | Severe Thunderstorm Warning | LIX | Ascension, Assumption, Iberville, Livingston, Saint James, Saint John the Baptist | 30 min |
| Feb 23, 1:30 PM CST | Severe Thunderstorm Warning | LIX | Pearl River | 45 min |
| Feb 23, 1:51 PM CST | Tornado Warning | LIX | Washington | 24 min |
| Feb 23, 2:28 PM CST | Flash Flood Warning | LCH | St. Mary | 3 hr |
| Feb 23, 2:35 PM CST | Severe Thunderstorm Warning | LIX | Ascension, Livingston, Saint James, Saint John the Baptist, Tangipahoa | 25 min |
| Feb 23, 3:03 PM CST | Severe Thunderstorm Warning | LIX | Ascension, Assumption, Iberville, Lafourche, Saint James | 27 min |
| Feb 23, 3:11 PM CST | Tornado Warning | LIX | Ascension, East Baton Rouge, Iberville | 18 min |
| Feb 23, 3:19 PM CST | Tornado Warning | LIX | Ascension, Assumption, Iberville, Saint James | 26 min |
| Feb 23, 3:27 PM CST | Tornado Warning | LIX | Plaquemines | 48 min |
| Feb 23, 3:38 PM CST | Tornado Warning | LIX | Ascension, Livingston, Saint James, Saint John the Baptist | 37 min |
| Feb 23, 3:42 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 33 min |
| Feb 23, 3:52 PM CST | Tornado Warning | LIX | Pearl River | 8 min |
| Feb 23, 3:54 PM CST | Severe Thunderstorm Warning | LIX | Harrison, Jackson | 36 min |
| Feb 23, 3:56 PM CST | Tornado Warning | LIX | Pearl River | 17 min |
| Feb 23, 4:01 PM CST | Tornado Warning | LIX | Saint John the Baptist, Saint Tammany, Tangipahoa | 29 min |
| Feb 23, 4:15 PM CST | Severe Thunderstorm Warning | LIX | Pearl River | 30 min |
| Feb 23, 4:27 PM CST | Tornado Warning | LIX | Saint Tammany, Tangipahoa | 33 min |
| Feb 23, 4:34 PM CST | Tornado Warning | LIX | Saint John the Baptist | 26 min |
| Feb 23, 4:48 PM CST | Tornado Warning | LIX | Saint Tammany | 27 min |
| Feb 23, 5:09 PM CST | Tornado Warning | LIX | Saint Tammany | 36 min |
| Feb 23, 5:13 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 47 min |
| Feb 23, 5:22 PM CST | Severe Thunderstorm Warning | LCH | Allen, Avoyelles, Evangeline, Saint Landry | 40 min |
| Feb 23, 5:42 PM CST | Tornado Warning | LIX | Saint Tammany | 33 min |
| Feb 23, 5:50 PM CST | Tornado Warning | LIX | Jackson | 25 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
Slidell Radar S, LA (KSIL), launched 12:00Z, 5.1 hours before the alert went out and 128 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
- 42 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 667 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
875 WWUS20 KWNS 231706 SEL9 SPC WW 231706 LAZ000-MSZ000-CWZ000-232300- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 19 NWS STORM PREDICTION CENTER NORMAN OK 1110 AM CST TUE FEB 23 2016 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF SOUTH CENTRAL AND SOUTHEAST LOUISIANA EXTREME SOUTHERN MISSISSIPPI COASTAL WATERS * EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 1110 AM UNTIL 500 PM CST. * PRIMARY THREATS INCLUDE... A FEW TORNADOES POSSIBLE ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE SUMMARY...SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP AND SPREAD NORTHEASTWARD ACROSS SOUTH CENTRAL AND SOUTHEAST LOUISIANA THROUGH THE AFTERNOON...AS THE STORM ENVIRONMENT GRADUALLY BECOMES MORE FAVORABLE FOR TORNADOES. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHEAST OF BATON ROUGE LOUISIANA TO 45 MILES SOUTHWEST OF HOUMA LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. && AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 24035. ...THOMPSON
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 23, 10:44 AM CST | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, Iberia, Iberville, Jefferson and 13 more | 91 min |
| Feb 23, 12:25 PM CST | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 19 more | 65 min |
| Feb 23, 1:15 PM CST | Mesoscale Discussion | SPC | East Feliciana, Saint Helena, Saint Tammany, Tangipahoa, Washington | 2 hr |
| Feb 23, 2:13 PM CST | Tornado Watch | SPC | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 4 more | 8 hr |
| Feb 23, 3:08 PM CST | Mesoscale Discussion | SPC | Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 4 more | 97 min |
| Feb 23, 5:18 PM CST | Mesoscale Discussion | SPC | Saint Tammany | 117 min |
| Feb 23, 2:20 PM CST | Tornado Watch | SPC | Adams, Attala, Carroll, Choctaw, Claiborne, Clay and 26 more | 6 hr |
| Feb 23, 3:30 PM CST | Mesoscale Discussion | SPC | Claiborne, Copiah, Hinds, Madison, Rankin, Yazoo | 90 min |
Nearby
Tornado Watches in Louisiana, 2016Tornado Watches in Mississippi, 2016Every tornado 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.