Alert archive / Louisiana / Tornado Watches in 1999
Tornado Watch 30
The Storm Prediction Center issued this tornado watch at Jan 22, 1999, 9:45 AM CST for 42 parishes in Louisiana; 8 counties in Mississippi. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 22, 1999, 9:45 AM CST (15:45 UTC)
- Expired
- Jan 22, 1999, 4:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 50 counties
Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Jefferson Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, LaSalle Parish, LA, Livingston Parish, LA, Natchitoches Parish, LA, Orleans Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Sabine 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, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Franklin County, MS, Lawrence County, MS, Lincoln County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS
The radar
The Ft Polk radar (KPOE), 97 km from the middle of the area, began a volume at 15:46 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.
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 22, 10:26 AM CST | Tornado Warning | LCH | Beauregard, Vernon | 64 min |
| Jan 22, 11:27 AM CST | Tornado Warning | SHV | Natchitoches | 58 min |
| Jan 22, 11:31 AM CST | Severe Thunderstorm Warning | LCH | Rapides, Vernon | 64 min |
| Jan 22, 11:37 AM CST | Severe Thunderstorm Warning | LCH | Avoyelles | 63 min |
| Jan 22, 11:51 AM CST | Severe Thunderstorm Warning | JAN | Catahoula, Concordia | 49 min |
| Jan 22, 11:51 AM CST | Tornado Warning | SHV | Grant | 44 min |
| Jan 22, 12:10 PM CST | Tornado Warning | JAN | Catahoula | 50 min |
| Jan 22, 12:27 PM CST | Severe Thunderstorm Warning | LCH | Saint Landry | 63 min |
| Jan 22, 12:48 PM CST | Tornado Warning | JAN | Concordia | 47 min |
| Jan 22, 1:00 PM CST | Severe Thunderstorm Warning | LCH | Acadia | 65 min |
| Jan 22, 1:07 PM CST | Tornado Warning | JAN | Adams | 48 min |
| Jan 22, 1:44 PM CST | Severe Thunderstorm Warning | LCH | Saint Landry | 61 min |
| Jan 22, 1:53 PM CST | Tornado Warning | JAN | Adams, Jefferson | 47 min |
| Jan 22, 2:36 PM CST | Tornado Warning | LCH | Lafayette | 64 min |
| Jan 22, 2:50 PM CST | Severe Thunderstorm Warning | LIX | West Feliciana | 30 min |
| Jan 22, 2:56 PM CST | Severe Thunderstorm Warning | JAN | Adams, Jefferson | 49 min |
| Jan 22, 2:58 PM CST | Severe Thunderstorm Warning | LCH | Iberia | 62 min |
| Jan 22, 3:06 PM CST | Tornado Warning | LIX | Wilkinson | 34 min |
| Jan 22, 3:33 PM CST | Severe Thunderstorm Warning | LIX | Iberville | 32 min |
| Jan 22, 3:36 PM CST | Tornado Warning | JAN | Franklin | 49 min |
| Jan 22, 3:51 PM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge, West Baton Rouge | 49 min |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 3.8 hours before the alert went out and 122 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
- 2024 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 561 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 214 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 9.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 21, 8:30 PM CST | Tornado Watch | SPC | Avoyelles, Bienville, Bossier, Caddo, Caldwell, Catahoula and 26 more | 7 hr |
| Jan 22, 3:00 AM CST | Tornado Watch | SPC | Allen, Avoyelles, Beauregard, Bienville, Bossier, Caddo and 29 more | 6 hr |
| Jan 22, 3:00 PM CST | Tornado Watch | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 19 more | 6 hr |
| Jan 21, 9:00 PM CST | Tornado Watch | SPC | Bolivar, Coahoma, DeSoto, Humphreys, Leflore, Marshall and 7 more | 6 hr |
| Jan 22, 3:00 AM CST | Tornado Watch | SPC | Alcorn, Benton, Bolivar, Calhoun, Carroll, Coahoma and 22 more | 6 hr |
| Jan 22, 9:00 AM CST | Tornado Watch | SPC | Alcorn, Amite, Attala, Benton, Bolivar, Calhoun and 69 more | 6 hr |
| Jan 22, 12:45 PM CST | Tornado Watch | SPC | Tishomingo | 6 hr |
| Jan 22, 2:15 PM CST | Tornado Watch | SPC | Adams, Amite, Attala, Carroll, Choctaw, Claiborne and 45 more | 6 hr |
Nearby
Tornado Watches in Louisiana, 1999Tornado Watches in Mississippi, 1999Every tornado watch in 1999
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.